Merge 6e7e5d5fd5 into a56243075a

.gitignore

@@ -6,6 +6,7 @@
 
 /tmp
 */**/*un~
+*/**/*.test
 *un~
 .DS_Store
 */**/.DS_Store

Godeps/Godeps.json

@@ -15,6 +15,11 @@
 			"Comment": "null-15",
 			"Rev": "12e4b4183793ac4b061921e7980845e750679fd0"
 		},
+		{
+			"ImportPath": "github.com/ethereum/ethash",
+			"Comment": "v17-23-g2561e13",
+			"Rev": "2561e1322a7e8e3d4a2cc903c44b1e96340bcb27"
+		},
 		{
 			"ImportPath": "github.com/ethereum/serpent-go",
 			"Rev": "5767a0dbd759d313df3f404dadb7f98d7ab51443"

Godeps/_workspace/src/github.com/ethereum/ethash/.gitignore

@@ -0,0 +1,5 @@
+.idea/
+.DS_Store
+*/**/*un~
+.vagrant/
+cpp-build/

Godeps/_workspace/src/github.com/ethereum/ethash/CMakeLists.txt

@@ -0,0 +1,14 @@
+cmake_minimum_required(VERSION 2.8.2)
+project(ethash)
+
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_SOURCE_DIR}/cmake/Modules/")
+set(ETHHASH_LIBS ethash)
+
+if (WIN32 AND WANT_CRYPTOPP)
+	add_subdirectory(cryptopp)
+endif()
+
+add_subdirectory(libethash)
+add_subdirectory(libethash-cl EXCLUDE_FROM_ALL)
+add_subdirectory(benchmark EXCLUDE_FROM_ALL)
+add_subdirectory(test EXCLUDE_FROM_ALL)

Godeps/_workspace/src/github.com/ethereum/ethash/benchmark/CMakeLists.txt

@@ -0,0 +1,53 @@
+include_directories(..)
+
+set(CMAKE_BUILD_TYPE Release)
+
+if (MSVC)
+	add_definitions("/openmp")
+endif()
+
+if (NOT MPI_FOUND)
+    find_package(MPI)
+endif()
+
+if (NOT CRYPTOPP_FOUND)
+	find_package(CryptoPP 5.6.2)
+endif()
+
+if (CRYPTOPP_FOUND)
+	add_definitions(-DWITH_CRYPTOPP)
+endif()
+
+if (NOT OpenCL_FOUND)
+	find_package(OpenCL)
+endif()
+if (OpenCL_FOUND)
+	add_definitions(-DWITH_OPENCL)
+	include_directories(${OpenCL_INCLUDE_DIRS})
+	list(APPEND FILES ethash_cl_miner.cpp ethash_cl_miner.h)
+endif()
+
+if (MPI_FOUND)
+    include_directories(${MPI_INCLUDE_PATH})
+    add_executable (Benchmark_MPI_FULL benchmark.cpp)
+    target_link_libraries (Benchmark_MPI_FULL ${ETHHASH_LIBS} ${MPI_LIBRARIES})
+    SET_TARGET_PROPERTIES(Benchmark_MPI_FULL PROPERTIES COMPILE_FLAGS "${COMPILE_FLAGS} ${MPI_COMPILE_FLAGS} -DFULL -DMPI")
+
+    add_executable (Benchmark_MPI_LIGHT benchmark.cpp)
+    target_link_libraries (Benchmark_MPI_LIGHT ${ETHHASH_LIBS} ${MPI_LIBRARIES})
+    SET_TARGET_PROPERTIES(Benchmark_MPI_LIGHT PROPERTIES COMPILE_FLAGS "${COMPILE_FLAGS} ${MPI_COMPILE_FLAGS} -DMPI")
+endif()
+
+add_executable (Benchmark_FULL benchmark.cpp)
+target_link_libraries (Benchmark_FULL ${ETHHASH_LIBS})
+SET_TARGET_PROPERTIES(Benchmark_FULL PROPERTIES COMPILE_FLAGS "${COMPILE_FLAGS} -DFULL")
+
+add_executable (Benchmark_LIGHT benchmark.cpp)
+target_link_libraries (Benchmark_LIGHT ${ETHHASH_LIBS})
+
+if (OpenCL_FOUND)
+	add_executable (Benchmark_CL benchmark.cpp)
+	target_link_libraries (Benchmark_CL ${ETHHASH_LIBS} ethash-cl)
+	SET_TARGET_PROPERTIES(Benchmark_CL PROPERTIES COMPILE_FLAGS "${COMPILE_FLAGS} -DOPENCL")
+endif()
+

Godeps/_workspace/src/github.com/ethereum/ethash/benchmark/benchmark.cpp

@@ -0,0 +1,260 @@
+/*
+  This file is part of cpp-ethereum.
+
+  cpp-ethereum is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  cpp-ethereum is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file benchmark.cpp
+ * @author Tim Hughes <tim@twistedfury.com>
+ * @date 2015
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <libethash/ethash.h>
+#include <libethash/util.h>
+#ifdef OPENCL
+#include <libethash-cl/ethash_cl_miner.h>
+#endif
+#include <vector>
+#include <algorithm>
+
+#ifdef WITH_CRYPTOPP
+#include <libethash/SHA3_cryptopp.h>
+#include <string>
+
+#else
+#include "libethash/sha3.h"
+#endif // WITH_CRYPTOPP
+
+#undef min
+#undef max
+
+#if defined(OPENCL)
+const unsigned trials = 1024*1024*32;
+#elif defined(FULL)
+const unsigned trials = 1024*1024/8;
+#else
+const unsigned trials = 1024*1024/1024;
+#endif
+uint8_t g_hashes[1024*32];
+
+static char nibbleToChar(unsigned nibble)
+{
+	return (char) ((nibble >= 10 ? 'a'-10 : '0') + nibble);
+}
+
+static uint8_t charToNibble(char chr)
+{
+	if (chr >= '0' && chr <= '9')
+	{
+		return (uint8_t) (chr - '0');
+	}
+	if (chr >= 'a' && chr <= 'z')
+	{
+		return (uint8_t) (chr - 'a' + 10);
+	}
+	if (chr >= 'A' && chr <= 'Z')
+	{
+		return (uint8_t) (chr - 'A' + 10);
+	}
+	return 0;
+}
+
+static std::vector<uint8_t> hexStringToBytes(char const* str)
+{
+	std::vector<uint8_t> bytes(strlen(str) >> 1);
+	for (unsigned i = 0; i != bytes.size(); ++i)
+	{
+		bytes[i] = charToNibble(str[i*2 | 0]) << 4;
+		bytes[i] |= charToNibble(str[i*2 | 1]);
+	}
+	return bytes;
+}
+
+static std::string bytesToHexString(uint8_t const* bytes, unsigned size)
+{
+	std::string str;
+	for (unsigned i = 0; i != size; ++i)
+	{
+		str += nibbleToChar(bytes[i] >> 4);
+		str += nibbleToChar(bytes[i] & 0xf);
+	}
+	return str;
+}
+
+extern "C" int main(void)
+{
+	// params for ethash
+	ethash_params params;
+	ethash_params_init(&params, 0);
+	//params.full_size = 262147 * 4096;	// 1GBish;
+	//params.full_size = 32771 * 4096;	// 128MBish;
+	//params.full_size = 8209 * 4096;	// 8MBish;
+	//params.cache_size = 8209*4096;
+	//params.cache_size = 2053*4096;
+	uint8_t seed[32], previous_hash[32];
+
+	memcpy(seed, hexStringToBytes("9410b944535a83d9adf6bbdcc80e051f30676173c16ca0d32d6f1263fc246466").data(), 32);
+	memcpy(previous_hash, hexStringToBytes("c5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470").data(), 32);
+	
+	// allocate page aligned buffer for dataset
+#ifdef FULL
+	void* full_mem_buf = malloc(params.full_size + 4095);
+	void* full_mem = (void*)((uintptr_t(full_mem_buf) + 4095) & ~4095);
+#endif
+	void* cache_mem_buf = malloc(params.cache_size + 63);
+	void* cache_mem = (void*)((uintptr_t(cache_mem_buf) + 63) & ~63);
+
+	ethash_cache cache;
+	cache.mem = cache_mem;
+	
+	// compute cache or full data
+	{
+		clock_t startTime = clock();
+		ethash_mkcache(&cache, &params, seed);
+		clock_t time = clock() - startTime;
+
+		uint8_t cache_hash[32];
+		SHA3_256(cache_hash, (uint8_t const*)cache_mem, params.cache_size);
+		debugf("ethash_mkcache: %ums, sha3: %s\n", (unsigned)((time*1000)/CLOCKS_PER_SEC), bytesToHexString(cache_hash,sizeof(cache_hash)).data());
+
+		// print a couple of test hashes
+		{
+			const clock_t startTime = clock();
+			ethash_return_value hash;
+			ethash_light(&hash, &cache, &params, previous_hash, 0);
+			const clock_t time = clock() - startTime;
+			debugf("ethash_light test: %ums, %s\n", (unsigned)((time*1000)/CLOCKS_PER_SEC), bytesToHexString(hash.result, 32).data());
+		}
+
+		#ifdef FULL
+			startTime = clock();
+			ethash_compute_full_data(full_mem, &params, &cache);
+			time = clock() - startTime;
+			debugf("ethash_compute_full_data: %ums\n", (unsigned)((time*1000)/CLOCKS_PER_SEC));
+		#endif // FULL
+	}
+
+#ifdef OPENCL
+	ethash_cl_miner miner;
+	{
+		const clock_t startTime = clock();
+		if (!miner.init(params, seed))
+			exit(-1);
+		const clock_t time = clock() - startTime;
+        debugf("ethash_cl_miner init: %ums\n", (unsigned)((time*1000)/CLOCKS_PER_SEC));
+	}
+#endif
+
+
+#ifdef FULL
+    {
+        const clock_t startTime = clock();
+		ethash_return_value hash;
+        ethash_full(&hash, full_mem, &params, previous_hash, 0);
+        const clock_t time = clock() - startTime;
+        debugf("ethash_full test: %uns, %s\n", (unsigned)((time*1000000)/CLOCKS_PER_SEC), bytesToHexString(hash.result, 32).data());
+    }
+#endif
+
+#ifdef OPENCL
+	// validate 1024 hashes against CPU
+	miner.hash(g_hashes, previous_hash, 0, 1024);
+	for (unsigned i = 0; i != 1024; ++i)
+	{
+		ethash_return_value hash;
+		ethash_light(&hash, &cache, &params, previous_hash, i);
+		if (memcmp(hash.result, g_hashes + 32*i, 32) != 0)
+		{
+			debugf("nonce %u failed: %s %s\n", i, bytesToHexString(g_hashes + 32*i, 32).c_str(), bytesToHexString(hash.result, 32).c_str());
+			static unsigned c = 0;
+			if (++c == 16)
+			{
+				exit(-1);
+			}
+		}
+	}
+#endif
+
+
+	clock_t startTime = clock();
+	unsigned hash_count = trials;
+	
+	#ifdef OPENCL
+	{
+		struct search_hook : ethash_cl_miner::search_hook
+		{
+			unsigned hash_count;
+			std::vector<uint64_t> nonce_vec;
+
+			virtual bool found(uint64_t const* nonces, uint32_t count)
+			{
+				nonce_vec.assign(nonces, nonces + count);
+				return false;
+			}
+
+			virtual bool searched(uint64_t start_nonce, uint32_t count)
+			{
+				// do nothing
+				hash_count += count;
+				return hash_count >= trials;
+			}
+		};
+		search_hook hook;
+		hook.hash_count = 0;
+
+		miner.search(previous_hash, 0x000000ffffffffff, hook);
+
+		for (unsigned i = 0; i != hook.nonce_vec.size(); ++i)
+		{
+			uint64_t nonce = hook.nonce_vec[i];
+			ethash_return_value hash;
+			ethash_light(&hash, &cache, &params, previous_hash, nonce);
+			debugf("found: %.8x%.8x -> %s\n", unsigned(nonce>>32), unsigned(nonce), bytesToHexString(hash.result, 32).c_str());
+		}
+
+		hash_count = hook.hash_count;
+	}
+	#else
+	{
+		//#pragma omp parallel for
+		for (int nonce = 0; nonce < trials; ++nonce)
+		{
+			ethash_return_value hash;
+			#ifdef FULL
+				ethash_full(&hash, full_mem, &params, previous_hash, nonce);
+			#else
+				ethash_light(&hash, &cache, &params, previous_hash, nonce);
+			#endif // FULL
+		}
+	}
+	#endif
+	
+	clock_t time = std::max((clock_t)1u, clock() - startTime);
+	
+	unsigned read_size = ACCESSES * MIX_BYTES;
+	debugf(			
+		"hashrate: %8u, bw: %6u MB/s\n",
+		(unsigned)(((uint64_t)hash_count*CLOCKS_PER_SEC)/time),
+		(unsigned)((((uint64_t)hash_count*read_size*CLOCKS_PER_SEC)/time) / (1024*1024))
+		);
+
+	free(cache_mem_buf);
+#ifdef FULL
+	free(full_mem_buf);
+#endif
+
+	return 0;
+}

Godeps/_workspace/src/github.com/ethereum/ethash/cmake/modules/FindCryptoPP.cmake

@@ -0,0 +1,108 @@
+# Module for locating the Crypto++ encryption library.
+#
+# Customizable variables:
+#   CRYPTOPP_ROOT_DIR
+#     This variable points to the CryptoPP root directory. On Windows the
+#     library location typically will have to be provided explicitly using the
+#     -D command-line option. The directory should include the include/cryptopp,
+#     lib and/or bin sub-directories.
+#
+# Read-only variables:
+#   CRYPTOPP_FOUND
+#     Indicates whether the library has been found.
+#
+#   CRYPTOPP_INCLUDE_DIRS
+#     Points to the CryptoPP include directory.
+#
+#   CRYPTOPP_LIBRARIES
+#     Points to the CryptoPP libraries that should be passed to
+#     target_link_libararies.
+#
+#
+# Copyright (c) 2012 Sergiu Dotenco
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in all
+# copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+# SOFTWARE.
+
+INCLUDE (FindPackageHandleStandardArgs)
+
+FIND_PATH (CRYPTOPP_ROOT_DIR
+  NAMES cryptopp/cryptlib.h include/cryptopp/cryptlib.h
+  PATHS ENV CRYPTOPPROOT
+  DOC "CryptoPP root directory")
+
+# Re-use the previous path:
+FIND_PATH (CRYPTOPP_INCLUDE_DIR
+  NAMES cryptopp/cryptlib.h
+  HINTS ${CRYPTOPP_ROOT_DIR}
+  PATH_SUFFIXES include
+  DOC "CryptoPP include directory")
+
+FIND_LIBRARY (CRYPTOPP_LIBRARY_DEBUG
+  NAMES cryptlibd cryptoppd
+  HINTS ${CRYPTOPP_ROOT_DIR}
+  PATH_SUFFIXES lib
+  DOC "CryptoPP debug library")
+
+FIND_LIBRARY (CRYPTOPP_LIBRARY_RELEASE
+  NAMES cryptlib cryptopp
+  HINTS ${CRYPTOPP_ROOT_DIR}
+  PATH_SUFFIXES lib
+  DOC "CryptoPP release library")
+
+IF (CRYPTOPP_LIBRARY_DEBUG AND CRYPTOPP_LIBRARY_RELEASE)
+  SET (CRYPTOPP_LIBRARY
+    optimized ${CRYPTOPP_LIBRARY_RELEASE}
+    debug ${CRYPTOPP_LIBRARY_DEBUG} CACHE DOC "CryptoPP library")
+ELSEIF (CRYPTOPP_LIBRARY_RELEASE)
+  SET (CRYPTOPP_LIBRARY ${CRYPTOPP_LIBRARY_RELEASE} CACHE DOC
+    "CryptoPP library")
+ENDIF (CRYPTOPP_LIBRARY_DEBUG AND CRYPTOPP_LIBRARY_RELEASE)
+
+IF (CRYPTOPP_INCLUDE_DIR)
+  SET (_CRYPTOPP_VERSION_HEADER ${CRYPTOPP_INCLUDE_DIR}/cryptopp/config.h)
+
+  IF (EXISTS ${_CRYPTOPP_VERSION_HEADER})
+    FILE (STRINGS ${_CRYPTOPP_VERSION_HEADER} _CRYPTOPP_VERSION_TMP REGEX
+      "^#define CRYPTOPP_VERSION[ \t]+[0-9]+$")
+
+    STRING (REGEX REPLACE
+      "^#define CRYPTOPP_VERSION[ \t]+([0-9]+)" "\\1" _CRYPTOPP_VERSION_TMP
+      ${_CRYPTOPP_VERSION_TMP})
+
+    STRING (REGEX REPLACE "([0-9]+)[0-9][0-9]" "\\1" CRYPTOPP_VERSION_MAJOR
+      ${_CRYPTOPP_VERSION_TMP})
+    STRING (REGEX REPLACE "[0-9]([0-9])[0-9]" "\\1" CRYPTOPP_VERSION_MINOR
+      ${_CRYPTOPP_VERSION_TMP})
+    STRING (REGEX REPLACE "[0-9][0-9]([0-9])" "\\1" CRYPTOPP_VERSION_PATCH
+      ${_CRYPTOPP_VERSION_TMP})
+
+    SET (CRYPTOPP_VERSION_COUNT 3)
+    SET (CRYPTOPP_VERSION
+      ${CRYPTOPP_VERSION_MAJOR}.${CRYPTOPP_VERSION_MINOR}.${CRYPTOPP_VERSION_PATCH})
+  ENDIF (EXISTS ${_CRYPTOPP_VERSION_HEADER})
+ENDIF (CRYPTOPP_INCLUDE_DIR)
+
+SET (CRYPTOPP_INCLUDE_DIRS ${CRYPTOPP_INCLUDE_DIR})
+SET (CRYPTOPP_LIBRARIES ${CRYPTOPP_LIBRARY})
+
+MARK_AS_ADVANCED (CRYPTOPP_INCLUDE_DIR CRYPTOPP_LIBRARY CRYPTOPP_LIBRARY_DEBUG
+  CRYPTOPP_LIBRARY_RELEASE)
+
+FIND_PACKAGE_HANDLE_STANDARD_ARGS (CryptoPP REQUIRED_VARS CRYPTOPP_ROOT_DIR
+  CRYPTOPP_INCLUDE_DIR CRYPTOPP_LIBRARY VERSION_VAR CRYPTOPP_VERSION)

Godeps/_workspace/src/github.com/ethereum/ethash/cmake/modules/FindOpenCL.cmake

@@ -0,0 +1,91 @@
+#
+#  This file taken from FindOpenCL project @ http://gitorious.com/findopencl
+#
+# - Try to find OpenCL
+# This module tries to find an OpenCL implementation on your system. It supports
+# AMD / ATI, Apple and NVIDIA implementations, but shoudl work, too.
+#
+# Once done this will define
+#  OPENCL_FOUND        - system has OpenCL
+#  OPENCL_INCLUDE_DIRS  - the OpenCL include directory
+#  OPENCL_LIBRARIES    - link these to use OpenCL
+#
+# WIN32 should work, but is untested
+
+FIND_PACKAGE( PackageHandleStandardArgs )
+
+SET (OPENCL_VERSION_STRING "0.1.0")
+SET (OPENCL_VERSION_MAJOR 0)
+SET (OPENCL_VERSION_MINOR 1)
+SET (OPENCL_VERSION_PATCH 0)
+
+IF (APPLE)
+
+  FIND_LIBRARY(OPENCL_LIBRARIES OpenCL DOC "OpenCL lib for OSX")
+  FIND_PATH(OPENCL_INCLUDE_DIRS OpenCL/cl.h DOC "Include for OpenCL on OSX")
+  FIND_PATH(_OPENCL_CPP_INCLUDE_DIRS OpenCL/cl.hpp DOC "Include for OpenCL CPP bindings on OSX")
+
+ELSE (APPLE)
+
+	IF (WIN32)
+	
+	    FIND_PATH(OPENCL_INCLUDE_DIRS CL/cl.h)
+	    FIND_PATH(_OPENCL_CPP_INCLUDE_DIRS CL/cl.hpp)
+	
+	    # The AMD SDK currently installs both x86 and x86_64 libraries
+	    # This is only a hack to find out architecture
+	    IF( ${CMAKE_SYSTEM_PROCESSOR} STREQUAL "AMD64" )
+	    	SET(OPENCL_LIB_DIR "$ENV{ATISTREAMSDKROOT}/lib/x86_64")
+			SET(OPENCL_LIB_DIR "$ENV{ATIINTERNALSTREAMSDKROOT}/lib/x86_64")
+	    ELSE (${CMAKE_SYSTEM_PROCESSOR} STREQUAL "AMD64")
+	    	SET(OPENCL_LIB_DIR "$ENV{ATISTREAMSDKROOT}/lib/x86")
+	   		SET(OPENCL_LIB_DIR "$ENV{ATIINTERNALSTREAMSDKROOT}/lib/x86")
+	    ENDIF( ${CMAKE_SYSTEM_PROCESSOR} STREQUAL "AMD64" )
+
+	    # find out if the user asked for a 64-bit build, and use the corresponding 
+	    # 64 or 32 bit NVIDIA library paths to the search:
+	    STRING(REGEX MATCH "Win64" ISWIN64 ${CMAKE_GENERATOR})
+	    IF("${ISWIN64}" STREQUAL "Win64") 
+	    	FIND_LIBRARY(OPENCL_LIBRARIES OpenCL.lib ${OPENCL_LIB_DIR} $ENV{CUDA_LIB_PATH} $ENV{CUDA_PATH}/lib/x64)
+	    ELSE("${ISWIN64}" STREQUAL "Win64") 
+	    	FIND_LIBRARY(OPENCL_LIBRARIES OpenCL.lib ${OPENCL_LIB_DIR} $ENV{CUDA_LIB_PATH} $ENV{CUDA_PATH}/lib/Win32)
+	    ENDIF("${ISWIN64}" STREQUAL "Win64") 
+
+	    GET_FILENAME_COMPONENT(_OPENCL_INC_CAND ${OPENCL_LIB_DIR}/../../include ABSOLUTE)
+	    
+	    # On Win32 search relative to the library
+	    FIND_PATH(OPENCL_INCLUDE_DIRS CL/cl.h PATHS "${_OPENCL_INC_CAND}" $ENV{CUDA_INC_PATH} $ENV{CUDA_PATH}/include)
+	    FIND_PATH(_OPENCL_CPP_INCLUDE_DIRS CL/cl.hpp PATHS "${_OPENCL_INC_CAND}" $ENV{CUDA_INC_PATH} $ENV{CUDA_PATH}/include)
+	
+	ELSE (WIN32)
+
+            # Unix style platforms
+            FIND_LIBRARY(OPENCL_LIBRARIES OpenCL
+              ENV LD_LIBRARY_PATH
+            )
+
+            GET_FILENAME_COMPONENT(OPENCL_LIB_DIR ${OPENCL_LIBRARIES} PATH)
+            GET_FILENAME_COMPONENT(_OPENCL_INC_CAND ${OPENCL_LIB_DIR}/../../include ABSOLUTE)
+
+            # The AMD SDK currently does not place its headers
+            # in /usr/include, therefore also search relative
+            # to the library
+            FIND_PATH(OPENCL_INCLUDE_DIRS CL/cl.h PATHS ${_OPENCL_INC_CAND} "/usr/local/cuda/include")
+            FIND_PATH(_OPENCL_CPP_INCLUDE_DIRS CL/cl.hpp PATHS ${_OPENCL_INC_CAND} "/usr/local/cuda/include")
+
+	ENDIF (WIN32)
+
+ENDIF (APPLE)
+
+FIND_PACKAGE_HANDLE_STANDARD_ARGS( OpenCL DEFAULT_MSG OPENCL_LIBRARIES OPENCL_INCLUDE_DIRS )
+
+IF( _OPENCL_CPP_INCLUDE_DIRS )
+	SET( OPENCL_HAS_CPP_BINDINGS TRUE )
+	LIST( APPEND OPENCL_INCLUDE_DIRS ${_OPENCL_CPP_INCLUDE_DIRS} )
+	# This is often the same, so clean up
+	LIST( REMOVE_DUPLICATES OPENCL_INCLUDE_DIRS )
+ENDIF( _OPENCL_CPP_INCLUDE_DIRS )
+
+MARK_AS_ADVANCED(
+  OPENCL_INCLUDE_DIRS
+)

Godeps/_workspace/src/github.com/ethereum/ethash/cryptopp/CMakeLists.txt

@@ -0,0 +1,13 @@
+set(LIBRARY cryptopp)
+
+include_directories(../../cryptopp)
+
+# todo, subset
+file(GLOB HEADERS "../../cryptopp/*.h")
+file(GLOB SOURCE "../../cryptopp/*.cpp")
+
+add_library(${LIBRARY} ${HEADERS} ${SOURCE})
+
+set(CRYPTOPP_INCLUDE_DIRS "../.." PARENT_SCOPE)
+set(CRYPTOPP_LIBRARIES ${LIBRARY} PARENT_SCOPE)
+set(CRYPTOPP_FOUND TRUE PARENT_SCOPE)

Godeps/_workspace/src/github.com/ethereum/ethash/ethash.go

@@ -0,0 +1,296 @@
+package ethash
+
+/*
+#cgo CFLAGS: -std=gnu99 -Wall
+#include "libethash/ethash.h"
+#include "libethash/util.c"
+#include "libethash/internal.c"
+#include "libethash/sha3.c"
+*/
+import "C"
+
+import (
+	"bytes"
+	"encoding/binary"
+	"log"
+	"math/big"
+	"math/rand"
+	"sync"
+	"time"
+	"unsafe"
+
+	"github.com/ethereum/go-ethereum/logger"
+	"github.com/ethereum/go-ethereum/pow"
+)
+
+var powlogger = logger.NewLogger("POW")
+
+type DAG struct {
+	SeedBlockNum uint64
+	dag          unsafe.Pointer // full GB of memory for dag
+}
+
+type ParamsAndCache struct {
+	params       *C.ethash_params
+	cache        *C.ethash_cache
+	SeedBlockNum uint64
+}
+
+type Ethash struct {
+	turbo          bool
+	HashRate       int64
+	chainManager   pow.ChainManager
+	dag            *DAG
+	paramsAndCache *ParamsAndCache
+	nextdag        unsafe.Pointer
+	ret            *C.ethash_return_value
+	dagMutex       *sync.Mutex
+	cacheMutex     *sync.Mutex
+}
+
+func parseNonce(nonce []byte) (uint64, error) {
+	nonceBuf := bytes.NewBuffer(nonce)
+	nonceInt, err := binary.ReadUvarint(nonceBuf)
+	if err != nil {
+		return 0, err
+	}
+	return nonceInt, nil
+}
+
+const epochLength uint64 = 30000
+
+func getSeedBlockNum(blockNum uint64) uint64 {
+	var seedBlockNum uint64 = 0
+	if blockNum >= 2*epochLength {
+		seedBlockNum = ((blockNum / epochLength) - 1) * epochLength
+	}
+	return seedBlockNum
+}
+
+func makeParamsAndCache(chainManager pow.ChainManager, blockNum uint64) *ParamsAndCache {
+	seedBlockNum := getSeedBlockNum(blockNum)
+	paramsAndCache := &ParamsAndCache{
+		params:       new(C.ethash_params),
+		cache:        new(C.ethash_cache),
+		SeedBlockNum: seedBlockNum,
+	}
+	C.ethash_params_init(paramsAndCache.params, C.uint32_t(seedBlockNum))
+	paramsAndCache.cache.mem = C.malloc(paramsAndCache.params.cache_size)
+	seedHash := chainManager.GetBlockByNumber(seedBlockNum).Header().Hash()
+	log.Println("Params", paramsAndCache.params)
+
+	log.Println("Making Cache")
+	start := time.Now()
+	C.ethash_mkcache(paramsAndCache.cache, paramsAndCache.params, (*C.uint8_t)((unsafe.Pointer)(&seedHash[0])))
+	log.Println("Took:", time.Since(start))
+	return paramsAndCache
+}
+
+func (pow *Ethash) updateCache() {
+	pow.cacheMutex.Lock()
+	seedNum := getSeedBlockNum(pow.chainManager.CurrentBlock().NumberU64())
+	if pow.paramsAndCache.SeedBlockNum != seedNum {
+		pow.paramsAndCache = makeParamsAndCache(pow.chainManager, pow.chainManager.CurrentBlock().NumberU64())
+	}
+	pow.cacheMutex.Unlock()
+}
+
+func makeDAG(p *ParamsAndCache) *DAG {
+	d := &DAG{
+		dag:          C.malloc(p.params.full_size),
+		SeedBlockNum: p.SeedBlockNum,
+	}
+	C.ethash_compute_full_data(d.dag, p.params, p.cache)
+	return d
+}
+
+func (pow *Ethash) updateDAG() {
+	pow.cacheMutex.Lock()
+	pow.dagMutex.Lock()
+
+	seedNum := getSeedBlockNum(pow.chainManager.CurrentBlock().NumberU64())
+	if pow.dag == nil || pow.dag.SeedBlockNum != seedNum {
+		pow.dag = nil
+		log.Println("Making Dag")
+		start := time.Now()
+		pow.dag = makeDAG(pow.paramsAndCache)
+		log.Println("Took:", time.Since(start))
+	}
+
+	pow.dagMutex.Unlock()
+	pow.cacheMutex.Unlock()
+}
+
+func New(chainManager pow.ChainManager) *Ethash {
+	return &Ethash{
+		turbo:          false,
+		paramsAndCache: makeParamsAndCache(chainManager, chainManager.CurrentBlock().NumberU64()),
+		chainManager:   chainManager,
+		dag:            nil,
+		ret:            new(C.ethash_return_value),
+		cacheMutex:     new(sync.Mutex),
+		dagMutex:       new(sync.Mutex),
+	}
+}
+
+func (pow *Ethash) DAGSize() uint64 {
+	return uint64(pow.paramsAndCache.params.full_size)
+}
+
+func (pow *Ethash) CacheSize() uint64 {
+	return uint64(pow.paramsAndCache.params.cache_size)
+}
+
+func (pow *Ethash) GetSeedHash(blockNum uint64) []byte {
+	return pow.chainManager.GetBlockByNumber(getSeedBlockNum(blockNum)).Header().Hash()
+}
+
+func (pow *Ethash) Stop() {
+	pow.cacheMutex.Lock()
+	pow.dagMutex.Lock()
+	if pow.paramsAndCache.cache != nil {
+		C.free(pow.paramsAndCache.cache.mem)
+	}
+	if pow.dag != nil {
+		C.free(pow.dag.dag)
+	}
+	pow.dagMutex.Unlock()
+	pow.cacheMutex.Unlock()
+}
+
+func (pow *Ethash) Search(block pow.Block, stop <-chan struct{}) ([]byte, []byte, []byte) {
+	pow.updateDAG()
+
+	// Not very elegant, multiple mining instances are not supported
+	pow.dagMutex.Lock()
+	pow.cacheMutex.Lock()
+	defer pow.cacheMutex.Unlock()
+	defer pow.dagMutex.Unlock()
+
+	r := rand.New(rand.NewSource(time.Now().UnixNano()))
+	miningHash := block.HashNoNonce()
+	diff := block.Difficulty()
+	log.Println("difficulty", diff)
+	i := int64(0)
+	start := time.Now().UnixNano()
+	t := time.Now()
+
+	nonce := uint64(r.Int63())
+
+	for {
+		select {
+		case <-stop:
+			powlogger.Infoln("Breaking from mining")
+			pow.HashRate = 0
+			pow.dagMutex.Unlock()
+			return nil, nil, nil
+		default:
+			i++
+
+			if time.Since(t) > (1 * time.Second) {
+				elapsed := time.Now().UnixNano() - start
+				hashes := ((float64(1e9) / float64(elapsed)) * float64(i)) / 1000
+				pow.HashRate = int64(hashes)
+				powlogger.Infoln("Hashing @", pow.HashRate, "khash")
+
+				t = time.Now()
+			}
+
+			cMiningHash := (*C.uint8_t)(unsafe.Pointer(&miningHash))
+			cnonce := C.uint64_t(nonce)
+			log.Printf("seed hash, nonce: %x %x\n", miningHash, nonce)
+			// pow.hash is the output/return of ethash_full
+			C.ethash_full(pow.ret, pow.dag.dag, pow.paramsAndCache.params, cMiningHash, cnonce)
+			res := C.ethash_check_difficulty((*C.uint8_t)(&pow.ret.result[0]), (*C.uint8_t)(unsafe.Pointer(&diff.Bytes()[0])))
+			if res == 1 {
+				mixDigest := C.GoBytes(unsafe.Pointer(&pow.ret.mix_hash[0]), 32)
+				// We don't really nead 32 bytes here
+				buf := make([]byte, 32)
+				binary.PutUvarint(buf, nonce)
+				return buf, mixDigest, pow.GetSeedHash(block.NumberU64())
+			}
+			nonce += 1
+		}
+
+		if !pow.turbo {
+			time.Sleep(20 * time.Microsecond)
+		}
+	}
+}
+
+func (pow *Ethash) Verify(block pow.Block) bool {
+	// Make sure the SeedHash is set correctly
+	if bytes.Compare(block.SeedHash(), pow.GetSeedHash(block.NumberU64())) != 0 {
+		log.Println("Block had wrong SeedHash")
+		log.Println("Expected: ", pow.GetSeedHash(block.NumberU64()))
+		log.Println("Actual: ", block.SeedHash())
+		return false
+	}
+
+	nonceInt, err := parseNonce(block.Nonce())
+	if err != nil {
+		log.Println("nonce to int err:", err)
+		return false
+	}
+	return pow.verify(block.HashNoNonce(), block.MixDigest(), block.Difficulty(), block.NumberU64(), nonceInt)
+}
+
+func (pow *Ethash) verify(hash []byte, mixDigest []byte, difficulty *big.Int, blockNum uint64, nonce uint64) bool {
+	// First check: make sure header, mixDigest, nonce are correct without hitting the DAG
+	// This is to prevent DOS attacks
+	chash := (*C.uint8_t)(unsafe.Pointer(&hash))
+	cnonce := C.uint64_t(nonce)
+	cmixDigest := (*C.uint8_t)(unsafe.Pointer(&mixDigest))
+	cdifficulty := (*C.uint8_t)(unsafe.Pointer(&difficulty.Bytes()[0]))
+	if C.ethash_quick_check_difficulty(chash, cnonce, cmixDigest, cdifficulty) != 1 {
+		log.Println("Failed to pass quick check.  Are you sure that the mix digest is correct?")
+		return false
+	}
+
+	var pAc *ParamsAndCache
+	// If its an old block (doesn't use the current cache)
+	// get the cache for it but don't update (so we don't need the mutex)
+	// Otherwise, it's the current block or a future.
+	// If current, updateCache will do nothing.
+	if getSeedBlockNum(blockNum) < pow.paramsAndCache.SeedBlockNum {
+		pAc = makeParamsAndCache(pow.chainManager, blockNum)
+	} else {
+		pow.updateCache()
+		pow.cacheMutex.Lock()
+		defer pow.cacheMutex.Unlock()
+		pAc = pow.paramsAndCache
+	}
+
+	C.ethash_light(pow.ret, pAc.cache, pAc.params, chash, cnonce)
+	res := C.ethash_check_difficulty((*C.uint8_t)(unsafe.Pointer(&pow.ret.result[0])), cdifficulty)
+	return res == 1
+}
+
+func (pow *Ethash) GetHashrate() int64 {
+	return pow.HashRate
+}
+
+func (pow *Ethash) Turbo(on bool) {
+	pow.turbo = on
+}
+
+func (pow *Ethash) FullHash(nonce uint64, miningHash []byte) []byte {
+	pow.updateDAG()
+	pow.dagMutex.Lock()
+	defer pow.dagMutex.Unlock()
+	cMiningHash := (*C.uint8_t)(unsafe.Pointer(&miningHash))
+	cnonce := C.uint64_t(nonce)
+	log.Println("seed hash, nonce:", miningHash, nonce)
+	// pow.hash is the output/return of ethash_full
+	C.ethash_full(pow.ret, pow.dag.dag, pow.paramsAndCache.params, cMiningHash, cnonce)
+	ghash_full := C.GoBytes(unsafe.Pointer(&pow.ret.result[0]), 32)
+	return ghash_full
+}
+
+func (pow *Ethash) LightHash(nonce uint64, miningHash []byte) []byte {
+	cMiningHash := (*C.uint8_t)(unsafe.Pointer(&miningHash))
+	cnonce := C.uint64_t(nonce)
+	C.ethash_light(pow.ret, pow.paramsAndCache.cache, pow.paramsAndCache.params, cMiningHash, cnonce)
+	ghash_light := C.GoBytes(unsafe.Pointer(&pow.ret.result[0]), 32)
+	return ghash_light
+}

Godeps/_workspace/src/github.com/ethereum/ethash/libethash-cl/CMakeLists.txt

@@ -0,0 +1,12 @@
+set(LIBRARY ethash-cl)
+set(CMAKE_BUILD_TYPE Release)
+
+if (NOT OPENCL_FOUND)
+	find_package(OpenCL)
+endif()
+if (OPENCL_FOUND)
+	include_directories(${OPENCL_INCLUDE_DIRS})
+	include_directories(..)
+	add_library(${LIBRARY} ethash_cl_miner.cpp ethash_cl_miner.h)
+	TARGET_LINK_LIBRARIES(${LIBRARY} ${OPENCL_LIBRARIES} ethash)
+endif()

Godeps/_workspace/src/github.com/ethereum/ethash/libethash-cl/ethash_cl_miner.cpp

@@ -0,0 +1,754 @@
+/*
+  This file is part of c-ethash.
+
+  c-ethash is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  c-ethash is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file ethash_cl_miner.cpp
+* @author Tim Hughes <tim@twistedfury.com>
+* @date 2015
+*/
+
+
+#define _CRT_SECURE_NO_WARNINGS
+
+#include <assert.h>
+#include <queue>
+#include "ethash_cl_miner.h"
+#include <libethash/util.h>
+
+#undef min
+#undef max
+
+#define HASH_BYTES 32
+
+static char const ethash_inner_code[] = R"(
+
+// author Tim Hughes <tim@twistedfury.com>
+// Tested on Radeon HD 7850
+// Hashrate: 15940347 hashes/s
+// Bandwidth: 124533 MB/s
+// search kernel should fit in <= 84 VGPRS (3 wavefronts)
+
+#define THREADS_PER_HASH (128 / 16)
+#define HASHES_PER_LOOP (GROUP_SIZE / THREADS_PER_HASH)
+
+#define FNV_PRIME	0x01000193
+
+__constant uint2 const Keccak_f1600_RC[24] = {
+	(uint2)(0x00000001, 0x00000000),
+	(uint2)(0x00008082, 0x00000000),
+	(uint2)(0x0000808a, 0x80000000),
+	(uint2)(0x80008000, 0x80000000),
+	(uint2)(0x0000808b, 0x00000000),
+	(uint2)(0x80000001, 0x00000000),
+	(uint2)(0x80008081, 0x80000000),
+	(uint2)(0x00008009, 0x80000000),
+	(uint2)(0x0000008a, 0x00000000),
+	(uint2)(0x00000088, 0x00000000),
+	(uint2)(0x80008009, 0x00000000),
+	(uint2)(0x8000000a, 0x00000000),
+	(uint2)(0x8000808b, 0x00000000),
+	(uint2)(0x0000008b, 0x80000000),
+	(uint2)(0x00008089, 0x80000000),
+	(uint2)(0x00008003, 0x80000000),
+	(uint2)(0x00008002, 0x80000000),
+	(uint2)(0x00000080, 0x80000000),
+	(uint2)(0x0000800a, 0x00000000),
+	(uint2)(0x8000000a, 0x80000000),
+	(uint2)(0x80008081, 0x80000000),
+	(uint2)(0x00008080, 0x80000000),
+	(uint2)(0x80000001, 0x00000000),
+	(uint2)(0x80008008, 0x80000000),
+};
+
+void keccak_f1600_round(uint2* a, uint r, uint out_size)
+{
+   #if !__ENDIAN_LITTLE__
+	for (uint i = 0; i != 25; ++i)
+		a[i] = a[i].yx;
+   #endif
+
+	uint2 b[25];
+	uint2 t;
+
+	// Theta
+	b[0] = a[0] ^ a[5] ^ a[10] ^ a[15] ^ a[20];
+	b[1] = a[1] ^ a[6] ^ a[11] ^ a[16] ^ a[21];
+	b[2] = a[2] ^ a[7] ^ a[12] ^ a[17] ^ a[22];
+	b[3] = a[3] ^ a[8] ^ a[13] ^ a[18] ^ a[23];
+	b[4] = a[4] ^ a[9] ^ a[14] ^ a[19] ^ a[24];
+	t = b[4] ^ (uint2)(b[1].x << 1 | b[1].y >> 31, b[1].y << 1 | b[1].x >> 31);
+	a[0] ^= t;
+	a[5] ^= t;
+	a[10] ^= t;
+	a[15] ^= t;
+	a[20] ^= t;
+	t = b[0] ^ (uint2)(b[2].x << 1 | b[2].y >> 31, b[2].y << 1 | b[2].x >> 31);
+	a[1] ^= t;
+	a[6] ^= t;
+	a[11] ^= t;
+	a[16] ^= t;
+	a[21] ^= t;
+	t = b[1] ^ (uint2)(b[3].x << 1 | b[3].y >> 31, b[3].y << 1 | b[3].x >> 31);
+	a[2] ^= t;
+	a[7] ^= t;
+	a[12] ^= t;
+	a[17] ^= t;
+	a[22] ^= t;
+	t = b[2] ^ (uint2)(b[4].x << 1 | b[4].y >> 31, b[4].y << 1 | b[4].x >> 31);
+	a[3] ^= t;
+	a[8] ^= t;
+	a[13] ^= t;
+	a[18] ^= t;
+	a[23] ^= t;
+	t = b[3] ^ (uint2)(b[0].x << 1 | b[0].y >> 31, b[0].y << 1 | b[0].x >> 31);
+	a[4] ^= t;
+	a[9] ^= t;
+	a[14] ^= t;
+	a[19] ^= t;
+	a[24] ^= t;
+
+	// Rho Pi
+	b[0] = a[0];
+	b[10] = (uint2)(a[1].x << 1 | a[1].y >> 31, a[1].y << 1 | a[1].x >> 31);
+	b[7] = (uint2)(a[10].x << 3 | a[10].y >> 29, a[10].y << 3 | a[10].x >> 29);
+	b[11] = (uint2)(a[7].x << 6 | a[7].y >> 26, a[7].y << 6 | a[7].x >> 26);
+	b[17] = (uint2)(a[11].x << 10 | a[11].y >> 22, a[11].y << 10 | a[11].x >> 22);
+	b[18] = (uint2)(a[17].x << 15 | a[17].y >> 17, a[17].y << 15 | a[17].x >> 17);
+	b[3] = (uint2)(a[18].x << 21 | a[18].y >> 11, a[18].y << 21 | a[18].x >> 11);
+	b[5] = (uint2)(a[3].x << 28 | a[3].y >> 4, a[3].y << 28 | a[3].x >> 4);
+	b[16] = (uint2)(a[5].y << 4 | a[5].x >> 28, a[5].x << 4 | a[5].y >> 28);
+	b[8] = (uint2)(a[16].y << 13 | a[16].x >> 19, a[16].x << 13 | a[16].y >> 19);
+	b[21] = (uint2)(a[8].y << 23 | a[8].x >> 9, a[8].x << 23 | a[8].y >> 9);
+	b[24] = (uint2)(a[21].x << 2 | a[21].y >> 30, a[21].y << 2 | a[21].x >> 30);
+	b[4] = (uint2)(a[24].x << 14 | a[24].y >> 18, a[24].y << 14 | a[24].x >> 18);
+	b[15] = (uint2)(a[4].x << 27 | a[4].y >> 5, a[4].y << 27 | a[4].x >> 5);
+	b[23] = (uint2)(a[15].y << 9 | a[15].x >> 23, a[15].x << 9 | a[15].y >> 23);
+	b[19] = (uint2)(a[23].y << 24 | a[23].x >> 8, a[23].x << 24 | a[23].y >> 8);
+	b[13] = (uint2)(a[19].x << 8 | a[19].y >> 24, a[19].y << 8 | a[19].x >> 24);
+	b[12] = (uint2)(a[13].x << 25 | a[13].y >> 7, a[13].y << 25 | a[13].x >> 7);
+	b[2] = (uint2)(a[12].y << 11 | a[12].x >> 21, a[12].x << 11 | a[12].y >> 21);
+	b[20] = (uint2)(a[2].y << 30 | a[2].x >> 2, a[2].x << 30 | a[2].y >> 2);
+	b[14] = (uint2)(a[20].x << 18 | a[20].y >> 14, a[20].y << 18 | a[20].x >> 14);
+	b[22] = (uint2)(a[14].y << 7 | a[14].x >> 25, a[14].x << 7 | a[14].y >> 25);
+	b[9] = (uint2)(a[22].y << 29 | a[22].x >> 3, a[22].x << 29 | a[22].y >> 3);
+	b[6] = (uint2)(a[9].x << 20 | a[9].y >> 12, a[9].y << 20 | a[9].x >> 12);
+	b[1] = (uint2)(a[6].y << 12 | a[6].x >> 20, a[6].x << 12 | a[6].y >> 20);
+
+	// Chi
+	a[0] = bitselect(b[0] ^ b[2], b[0], b[1]);
+	a[1] = bitselect(b[1] ^ b[3], b[1], b[2]);
+	a[2] = bitselect(b[2] ^ b[4], b[2], b[3]);
+	a[3] = bitselect(b[3] ^ b[0], b[3], b[4]);
+	if (out_size >= 4)
+	{
+		a[4] = bitselect(b[4] ^ b[1], b[4], b[0]);
+		a[5] = bitselect(b[5] ^ b[7], b[5], b[6]);
+		a[6] = bitselect(b[6] ^ b[8], b[6], b[7]);
+		a[7] = bitselect(b[7] ^ b[9], b[7], b[8]);
+		a[8] = bitselect(b[8] ^ b[5], b[8], b[9]);
+		if (out_size >= 8)
+		{
+			a[9] = bitselect(b[9] ^ b[6], b[9], b[5]);
+			a[10] = bitselect(b[10] ^ b[12], b[10], b[11]);
+			a[11] = bitselect(b[11] ^ b[13], b[11], b[12]);
+			a[12] = bitselect(b[12] ^ b[14], b[12], b[13]);
+			a[13] = bitselect(b[13] ^ b[10], b[13], b[14]);
+			a[14] = bitselect(b[14] ^ b[11], b[14], b[10]);
+			a[15] = bitselect(b[15] ^ b[17], b[15], b[16]);
+			a[16] = bitselect(b[16] ^ b[18], b[16], b[17]);
+			a[17] = bitselect(b[17] ^ b[19], b[17], b[18]);
+			a[18] = bitselect(b[18] ^ b[15], b[18], b[19]);
+			a[19] = bitselect(b[19] ^ b[16], b[19], b[15]);
+			a[20] = bitselect(b[20] ^ b[22], b[20], b[21]);
+			a[21] = bitselect(b[21] ^ b[23], b[21], b[22]);
+			a[22] = bitselect(b[22] ^ b[24], b[22], b[23]);
+			a[23] = bitselect(b[23] ^ b[20], b[23], b[24]);
+			a[24] = bitselect(b[24] ^ b[21], b[24], b[20]);
+		}
+	}
+
+	// Iota
+	a[0] ^= Keccak_f1600_RC[r];
+
+   #if !__ENDIAN_LITTLE__
+	for (uint i = 0; i != 25; ++i)
+		a[i] = a[i].yx;
+   #endif
+}
+
+void keccak_f1600_no_absorb(ulong* a, uint in_size, uint out_size, uint isolate)
+{
+	for (uint i = in_size; i != 25; ++i)
+	{
+		a[i] = 0;
+	}
+#if __ENDIAN_LITTLE__
+	a[in_size] ^= 0x0000000000000001;
+	a[24-out_size*2] ^= 0x8000000000000000;
+#else
+	a[in_size] ^= 0x0100000000000000;
+	a[24-out_size*2] ^= 0x0000000000000080;
+#endif
+
+	// Originally I unrolled the first and last rounds to interface
+	// better with surrounding code, however I haven't done this
+	// without causing the AMD compiler to blow up the VGPR usage.
+	uint r = 0;
+	do
+	{
+		// This dynamic branch stops the AMD compiler unrolling the loop
+		// and additionally saves about 33% of the VGPRs, enough to gain another
+		// wavefront. Ideally we'd get 4 in flight, but 3 is the best I can
+		// massage out of the compiler. It doesn't really seem to matter how
+		// much we try and help the compiler save VGPRs because it seems to throw
+		// that information away, hence the implementation of keccak here
+		// doesn't bother.
+		if (isolate) 
+		{
+			keccak_f1600_round((uint2*)a, r++, 25);
+		}
+	}
+	while (r < 23);
+	
+	// final round optimised for digest size
+	keccak_f1600_round((uint2*)a, r++, out_size);
+}
+
+#define copy(dst, src, count) for (uint i = 0; i != count; ++i) { (dst)[i] = (src)[i]; }
+
+#define countof(x) (sizeof(x) / sizeof(x[0]))
+
+uint fnv(uint x, uint y)
+{
+	return x * FNV_PRIME ^ y;
+}
+
+uint4 fnv4(uint4 x, uint4 y)
+{
+	return x * FNV_PRIME ^ y;
+}
+
+uint fnv_reduce(uint4 v)
+{
+	return fnv(fnv(fnv(v.x, v.y), v.z), v.w);
+}
+
+typedef union
+{
+	ulong ulongs[32 / sizeof(ulong)];
+	uint uints[32 / sizeof(uint)];
+} hash32_t;
+
+typedef union
+{
+	ulong ulongs[64 / sizeof(ulong)];
+	uint4 uint4s[64 / sizeof(uint4)];
+} hash64_t;
+
+typedef union
+{
+	uint uints[128 / sizeof(uint)];
+	uint4 uint4s[128 / sizeof(uint4)];
+} hash128_t;
+
+hash64_t init_hash(__constant hash32_t const* header, ulong nonce, uint isolate)
+{
+	hash64_t init;
+	uint const init_size = countof(init.ulongs);
+	uint const hash_size = countof(header->ulongs);
+	
+	// sha3_512(header .. nonce)
+	ulong state[25];
+	copy(state, header->ulongs, hash_size);
+	state[hash_size] = nonce;
+	keccak_f1600_no_absorb(state, hash_size + 1, init_size, isolate);
+
+	copy(init.ulongs, state, init_size);
+	return init;
+}
+
+uint inner_loop(uint4 init, uint thread_id, __local uint* share, __global hash128_t const* g_dag, uint isolate)
+{
+	uint4 mix = init;
+
+	// share init0
+	if (thread_id == 0)
+		*share = mix.x;
+	barrier(CLK_LOCAL_MEM_FENCE);
+	uint init0 = *share;
+
+	uint a = 0;
+	do
+	{
+		bool update_share = thread_id == (a/4) % THREADS_PER_HASH;
+
+		#pragma unroll
+		for (uint i = 0; i != 4; ++i)
+		{
+			if (update_share)
+			{
+				uint m[4] = { mix.x, mix.y, mix.z, mix.w };
+				*share = fnv(init0 ^ (a+i), m[i]) % DAG_SIZE;
+			}
+			barrier(CLK_LOCAL_MEM_FENCE);
+
+			mix = fnv4(mix, g_dag[*share].uint4s[thread_id]);
+		}
+	}
+	while ((a += 4) != (ACCESSES & isolate));
+
+	return fnv_reduce(mix);
+}
+
+hash32_t final_hash(hash64_t const* init, hash32_t const* mix, uint isolate)
+{
+	ulong state[25];
+
+	hash32_t hash;
+	uint const hash_size = countof(hash.ulongs);
+	uint const init_size = countof(init->ulongs);
+	uint const mix_size = countof(mix->ulongs);
+
+	// keccak_256(keccak_512(header..nonce) .. mix);
+	copy(state, init->ulongs, init_size);
+	copy(state + init_size, mix->ulongs, mix_size);
+	keccak_f1600_no_absorb(state, init_size+mix_size, hash_size, isolate);
+
+	// copy out
+	copy(hash.ulongs, state, hash_size);
+	return hash;
+}
+
+hash32_t compute_hash_simple(
+	__constant hash32_t const* g_header,
+	__global hash128_t const* g_dag,
+	ulong nonce,
+	uint isolate
+	)
+{
+	hash64_t init = init_hash(g_header, nonce, isolate);
+
+	hash128_t mix;
+	for (uint i = 0; i != countof(mix.uint4s); ++i)
+	{
+		mix.uint4s[i] = init.uint4s[i % countof(init.uint4s)];
+	}
+	
+	uint mix_val = mix.uints[0];
+	uint init0 = mix.uints[0];
+	uint a = 0;
+	do
+	{
+		uint pi = fnv(init0 ^ a, mix_val) % DAG_SIZE;
+		uint n = (a+1) % countof(mix.uints);
+
+		#pragma unroll
+		for (uint i = 0; i != countof(mix.uints); ++i)
+		{
+			mix.uints[i] = fnv(mix.uints[i], g_dag[pi].uints[i]);
+			mix_val = i == n ? mix.uints[i] : mix_val;
+		}
+	}
+	while (++a != (ACCESSES & isolate));
+
+	// reduce to output
+	hash32_t fnv_mix;
+	for (uint i = 0; i != countof(fnv_mix.uints); ++i)
+	{
+		fnv_mix.uints[i] = fnv_reduce(mix.uint4s[i]);
+	}
+	
+	return final_hash(&init, &fnv_mix, isolate);
+}
+
+typedef union
+{
+	struct
+	{
+		hash64_t init;
+		uint pad; // avoid lds bank conflicts
+	};
+	hash32_t mix;
+} compute_hash_share;
+
+hash32_t compute_hash(
+	__local compute_hash_share* share,
+	__constant hash32_t const* g_header,
+	__global hash128_t const* g_dag,
+	ulong nonce,
+	uint isolate
+	)
+{
+	uint const gid = get_global_id(0);
+
+	// Compute one init hash per work item.
+	hash64_t init = init_hash(g_header, nonce, isolate);
+
+	// Threads work together in this phase in groups of 8.
+	uint const thread_id = gid % THREADS_PER_HASH;
+	uint const hash_id = (gid % GROUP_SIZE) / THREADS_PER_HASH;
+
+	hash32_t mix;
+	uint i = 0;
+	do
+	{
+		// share init with other threads
+		if (i == thread_id)
+			share[hash_id].init = init;
+		barrier(CLK_LOCAL_MEM_FENCE);
+
+		uint4 thread_init = share[hash_id].init.uint4s[thread_id % (64 / sizeof(uint4))];
+		barrier(CLK_LOCAL_MEM_FENCE);
+
+		uint thread_mix = inner_loop(thread_init, thread_id, share[hash_id].mix.uints, g_dag, isolate);
+
+		share[hash_id].mix.uints[thread_id] = thread_mix;
+		barrier(CLK_LOCAL_MEM_FENCE);
+
+		if (i == thread_id)
+			mix = share[hash_id].mix;
+		barrier(CLK_LOCAL_MEM_FENCE);
+	}
+	while (++i != (THREADS_PER_HASH & isolate));
+
+	return final_hash(&init, &mix, isolate);
+}
+
+__attribute__((reqd_work_group_size(GROUP_SIZE, 1, 1)))
+__kernel void ethash_hash_simple(
+	__global hash32_t* g_hashes,
+	__constant hash32_t const* g_header,
+	__global hash128_t const* g_dag,
+	ulong start_nonce,
+	uint isolate
+	)
+{
+	uint const gid = get_global_id(0);
+	g_hashes[gid] = compute_hash_simple(g_header, g_dag, start_nonce + gid, isolate);
+}
+
+__attribute__((reqd_work_group_size(GROUP_SIZE, 1, 1)))
+__kernel void ethash_search_simple(
+	__global volatile uint* restrict g_output,
+	__constant hash32_t const* g_header,
+	__global hash128_t const* g_dag,
+	ulong start_nonce,
+	ulong target,
+	uint isolate
+	)
+{
+	uint const gid = get_global_id(0);
+	hash32_t hash = compute_hash_simple(g_header, g_dag, start_nonce + gid, isolate);
+
+	if (hash.ulongs[countof(hash.ulongs)-1] < target)
+	{
+		uint slot = min(MAX_OUTPUTS, atomic_inc(&g_output[0]) + 1);
+		g_output[slot] = gid;
+	}
+}
+
+__attribute__((reqd_work_group_size(GROUP_SIZE, 1, 1)))
+__kernel void ethash_hash(
+	__global hash32_t* g_hashes,
+	__constant hash32_t const* g_header,
+	__global hash128_t const* g_dag,
+	ulong start_nonce,
+	uint isolate
+	)
+{
+	__local compute_hash_share share[HASHES_PER_LOOP];
+
+	uint const gid = get_global_id(0);
+	g_hashes[gid] = compute_hash(share, g_header, g_dag, start_nonce + gid, isolate);
+}
+
+__attribute__((reqd_work_group_size(GROUP_SIZE, 1, 1)))
+__kernel void ethash_search(
+	__global volatile uint* restrict g_output,
+	__constant hash32_t const* g_header,
+	__global hash128_t const* g_dag,
+	ulong start_nonce,
+	ulong target,
+	uint isolate
+	)
+{
+	__local compute_hash_share share[HASHES_PER_LOOP];
+
+	uint const gid = get_global_id(0);
+	hash32_t hash = compute_hash(share, g_header, g_dag, start_nonce + gid, isolate);
+
+	if (hash.ulongs[countof(hash.ulongs)-1] < target)
+	{
+		uint slot = min(MAX_OUTPUTS, atomic_inc(&g_output[0]) + 1);
+		g_output[slot] = gid;
+	}
+}
+
+)";
+
+static void add_definition(std::string& source, char const* id, unsigned value)
+{
+	char buf[256];
+	sprintf(buf, "#define %s %uu\n", id, value);
+	source.insert(source.begin(), buf, buf + strlen(buf));
+}
+
+ethash_cl_miner::ethash_cl_miner()
+{
+}
+
+bool ethash_cl_miner::init(ethash_params const& params, const uint8_t seed[32], unsigned workgroup_size)
+{
+	// store params
+	m_params = params;
+
+	// get all platforms
+    std::vector<cl::Platform> platforms;
+    cl::Platform::get(&platforms);
+	if (platforms.empty())
+	{
+		debugf("No OpenCL platforms found.\n");
+		return false;
+	}
+
+	// use default platform
+	debugf("Using platform: %s\n", platforms[0].getInfo<CL_PLATFORM_NAME>().c_str());
+
+    // get GPU device of the default platform
+    std::vector<cl::Device> devices;
+    platforms[0].getDevices(CL_DEVICE_TYPE_ALL, &devices);
+    if (devices.empty())
+	{
+		debugf("No OpenCL devices found.\n");
+		return false;
+	}
+
+	// use default device
+	cl::Device& device = devices[0];
+	debugf("Using device: %s\n", device.getInfo<CL_DEVICE_NAME>().c_str());
+
+	// create context
+	m_context = cl::Context({device});
+	m_queue = cl::CommandQueue(m_context, device);
+
+	// use requested workgroup size, but we require multiple of 8
+	m_workgroup_size = ((workgroup_size + 7) / 8) * 8;
+
+	// patch source code
+	std::string code = ethash_inner_code;
+	add_definition(code, "GROUP_SIZE", m_workgroup_size);
+	add_definition(code, "DAG_SIZE", (unsigned)(params.full_size / MIX_BYTES));
+	add_definition(code, "ACCESSES", ACCESSES);
+	add_definition(code, "MAX_OUTPUTS", c_max_search_results);
+	//debugf("%s", code.c_str());
+
+	// create miner OpenCL program
+	cl::Program::Sources sources;
+	sources.push_back({code.c_str(), code.size()});
+
+	cl::Program program(m_context, sources);
+	try
+	{
+		program.build({device});
+	}
+	catch (cl::Error err)
+	{
+		debugf("%s\n", program.getBuildInfo<CL_PROGRAM_BUILD_LOG>(device).c_str());
+		return false;
+	}
+	m_hash_kernel = cl::Kernel(program, "ethash_hash");
+	m_search_kernel = cl::Kernel(program, "ethash_search");
+
+	// create buffer for dag
+	m_dag = cl::Buffer(m_context, CL_MEM_READ_ONLY, params.full_size);
+	
+	// create buffer for header
+	m_header = cl::Buffer(m_context, CL_MEM_READ_ONLY, 32);
+
+	// compute dag on CPU
+	{
+		void* cache_mem = malloc(params.cache_size + 63);
+		ethash_cache cache;
+		cache.mem = (void*)(((uintptr_t)cache_mem + 63) & ~63);
+		ethash_mkcache(&cache, &params, seed);
+
+		// if this throws then it's because we probably need to subdivide the dag uploads for compatibility
+		void* dag_ptr = m_queue.enqueueMapBuffer(m_dag, true, CL_MAP_WRITE_INVALIDATE_REGION, 0, params.full_size);
+		ethash_compute_full_data(dag_ptr, &params, &cache);
+		m_queue.enqueueUnmapMemObject(m_dag, dag_ptr);
+
+		free(cache_mem);
+	}
+
+	// create mining buffers
+	for (unsigned i = 0; i != c_num_buffers; ++i)
+	{
+		m_hash_buf[i] = cl::Buffer(m_context, CL_MEM_WRITE_ONLY | CL_MEM_HOST_READ_ONLY, 32*c_hash_batch_size);
+		m_search_buf[i] = cl::Buffer(m_context, CL_MEM_WRITE_ONLY, (c_max_search_results + 1) * sizeof(uint32_t));
+	}
+	return true;
+}
+
+void ethash_cl_miner::hash(uint8_t* ret, uint8_t const* header, uint64_t nonce, unsigned count)
+{
+	struct pending_batch
+	{
+		unsigned base;
+		unsigned count;
+		unsigned buf;
+	};
+	std::queue<pending_batch> pending;
+	
+	// update header constant buffer
+	m_queue.enqueueWriteBuffer(m_header, true, 0, 32, header);
+
+	/*
+	__kernel void ethash_combined_hash(
+		__global hash32_t* g_hashes,
+		__constant hash32_t const* g_header,
+		__global hash128_t const* g_dag,
+		ulong start_nonce,
+		uint isolate
+		)
+	*/
+	m_hash_kernel.setArg(1, m_header);
+	m_hash_kernel.setArg(2, m_dag);
+	m_hash_kernel.setArg(3, nonce);
+	m_hash_kernel.setArg(4, ~0u); // have to pass this to stop the compile unrolling the loop
+
+	unsigned buf = 0;
+	for (unsigned i = 0; i < count || !pending.empty(); )
+	{
+		// how many this batch
+		if (i < count)
+		{
+			unsigned const this_count = std::min(count - i, c_hash_batch_size);
+			unsigned const batch_count = std::max(this_count, m_workgroup_size);
+
+			// supply output hash buffer to kernel
+			m_hash_kernel.setArg(0, m_hash_buf[buf]);
+
+			// execute it!
+			clock_t start_time = clock();
+			m_queue.enqueueNDRangeKernel(
+				m_hash_kernel,
+				cl::NullRange,
+				cl::NDRange(batch_count),
+				cl::NDRange(m_workgroup_size)
+				);
+			m_queue.flush();
+		
+			pending.push({i, this_count, buf});
+			i += this_count;
+			buf = (buf + 1) % c_num_buffers;
+		}
+
+		// read results
+		if (i == count || pending.size() == c_num_buffers)
+		{
+			pending_batch const& batch = pending.front();
+
+			// could use pinned host pointer instead, but this path isn't that important.
+			uint8_t* hashes = (uint8_t*)m_queue.enqueueMapBuffer(m_hash_buf[batch.buf], true, CL_MAP_READ, 0, batch.count * HASH_BYTES);
+			memcpy(ret + batch.base*HASH_BYTES, hashes, batch.count*HASH_BYTES);
+			m_queue.enqueueUnmapMemObject(m_hash_buf[batch.buf], hashes);
+
+			pending.pop();
+		}
+	}
+}
+
+
+void ethash_cl_miner::search(uint8_t const* header, uint64_t target, search_hook& hook)
+{
+	struct pending_batch
+	{
+		uint64_t start_nonce;
+		unsigned buf;
+	};
+	std::queue<pending_batch> pending;
+
+	static uint32_t const c_zero = 0;
+
+	// update header constant buffer
+	m_queue.enqueueWriteBuffer(m_header, false, 0, 32, header);
+	for (unsigned i = 0; i != c_num_buffers; ++i)
+	{
+		m_queue.enqueueWriteBuffer(m_search_buf[i], false, 0, 4, &c_zero);
+	}
+	cl::Event pre_return_event;
+	m_queue.enqueueBarrierWithWaitList(NULL, &pre_return_event);
+
+	/*
+	__kernel void ethash_combined_search(
+		__global hash32_t* g_hashes,			// 0
+		__constant hash32_t const* g_header,	// 1
+		__global hash128_t const* g_dag,		// 2
+		ulong start_nonce,						// 3
+		ulong target,							// 4
+		uint isolate							// 5
+	)
+	*/
+	m_search_kernel.setArg(1, m_header);
+	m_search_kernel.setArg(2, m_dag);
+
+	// pass these to stop the compiler unrolling the loops
+	m_search_kernel.setArg(4, target);
+	m_search_kernel.setArg(5, ~0u);
+
+
+	unsigned buf = 0;
+	for (uint64_t start_nonce = 0; ; start_nonce += c_search_batch_size)
+	{
+		// supply output buffer to kernel
+		m_search_kernel.setArg(0, m_search_buf[buf]);
+		m_search_kernel.setArg(3, start_nonce);
+
+		// execute it!
+		m_queue.enqueueNDRangeKernel(m_search_kernel, cl::NullRange, c_search_batch_size, m_workgroup_size);
+		
+		pending.push({start_nonce, buf});
+		buf = (buf + 1) % c_num_buffers;
+
+		// read results
+		if (pending.size() == c_num_buffers)
+		{
+			pending_batch const& batch = pending.front();
+
+			// could use pinned host pointer instead
+			uint32_t* results = (uint32_t*)m_queue.enqueueMapBuffer(m_search_buf[batch.buf], true, CL_MAP_READ, 0, (1+c_max_search_results) * sizeof(uint32_t));
+			unsigned num_found = std::min(results[0], c_max_search_results);
+
+			uint64_t nonces[c_max_search_results];
+			for (unsigned i = 0; i != num_found; ++i)
+			{
+				nonces[i] = batch.start_nonce + results[i+1];
+			}
+			
+			m_queue.enqueueUnmapMemObject(m_search_buf[batch.buf], results);
+			
+			bool exit = num_found && hook.found(nonces, num_found);
+			exit |= hook.searched(batch.start_nonce, c_search_batch_size); // always report searched before exit
+			if (exit)
+				break;
+
+			pending.pop();
+		}
+	}
+
+	// not safe to return until this is ready
+	pre_return_event.wait();
+}
+

Godeps/_workspace/src/github.com/ethereum/ethash/libethash-cl/ethash_cl_miner.h

@@ -0,0 +1,43 @@
+#pragma once
+
+#define __CL_ENABLE_EXCEPTIONS 
+#define CL_USE_DEPRECATED_OPENCL_2_0_APIS
+#include "cl.hpp"
+#include <time.h>
+#include <libethash/ethash.h>
+
+class ethash_cl_miner
+{
+public:
+	struct search_hook
+	{
+		// reports progress, return true to abort
+		virtual bool found(uint64_t const* nonces, uint32_t count) = 0;
+		virtual bool searched(uint64_t start_nonce, uint32_t count) = 0;
+	};
+
+public:
+	ethash_cl_miner();
+
+	bool init(ethash_params const& params, const uint8_t seed[32], unsigned workgroup_size = 64);
+
+	void hash(uint8_t* ret, uint8_t const* header, uint64_t nonce, unsigned count);
+	void search(uint8_t const* header, uint64_t target, search_hook& hook);
+
+private:
+	static unsigned const c_max_search_results = 63;
+	static unsigned const c_num_buffers = 2;
+	static unsigned const c_hash_batch_size = 1024;
+	static unsigned const c_search_batch_size = 1024*256;
+
+	ethash_params m_params;
+	cl::Context m_context;
+	cl::CommandQueue m_queue;
+	cl::Kernel m_hash_kernel;
+	cl::Kernel m_search_kernel;
+	cl::Buffer m_dag;
+	cl::Buffer m_header;
+	cl::Buffer m_hash_buf[c_num_buffers];
+	cl::Buffer m_search_buf[c_num_buffers];
+	unsigned m_workgroup_size;
+};

Godeps/_workspace/src/github.com/ethereum/ethash/libethash-cuda/CMakeLists.txt

@@ -0,0 +1,15 @@
+find_package(CUDA)
+ 
+# Pass options to NVCC
+
+ 
+if (CUDA_FOUND)
+set(CUDA_NVCC_FLAGS "   -gencode;arch=compute_30,code=sm_30;
+                        -gencode;arch=compute_20,code=sm_20;
+                        -gencode;arch=compute_11,code=sm_11;
+                        -gencode;arch=compute_12,code=sm_12;
+                        -gencode;arch=compute_13,code=sm_13;")
+cuda_add_executable(
+    ethash-cuda
+    libethash.cu)
+endif()

Godeps/_workspace/src/github.com/ethereum/ethash/libethash-cuda/cuPrintf.cu

@@ -0,0 +1,879 @@
+/*
+	Copyright 2009 NVIDIA Corporation.  All rights reserved.
+
+	NOTICE TO LICENSEE:   
+
+	This source code and/or documentation ("Licensed Deliverables") are subject 
+	to NVIDIA intellectual property rights under U.S. and international Copyright 
+	laws.  
+
+	These Licensed Deliverables contained herein is PROPRIETARY and CONFIDENTIAL 
+	to NVIDIA and is being provided under the terms and conditions of a form of 
+	NVIDIA software license agreement by and between NVIDIA and Licensee ("License 
+	Agreement") or electronically accepted by Licensee.  Notwithstanding any terms 
+	or conditions to the contrary in the License Agreement, reproduction or 
+	disclosure of the Licensed Deliverables to any third party without the express 
+	written consent of NVIDIA is prohibited.     
+
+	NOTWITHSTANDING ANY TERMS OR CONDITIONS TO THE CONTRARY IN THE LICENSE AGREEMENT, 
+	NVIDIA MAKES NO REPRESENTATION ABOUT THE SUITABILITY OF THESE LICENSED 
+	DELIVERABLES FOR ANY PURPOSE.  IT IS PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED 
+	WARRANTY OF ANY KIND. NVIDIA DISCLAIMS ALL WARRANTIES WITH REGARD TO THESE 
+	LICENSED DELIVERABLES, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY, 
+	NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE.   NOTWITHSTANDING ANY 
+	TERMS OR CONDITIONS TO THE CONTRARY IN THE LICENSE AGREEMENT, IN NO EVENT SHALL 
+	NVIDIA BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, 
+	OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,	WHETHER 
+	IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,  ARISING OUT OF 
+	OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THESE LICENSED DELIVERABLES.  
+
+	U.S. Government End Users. These Licensed Deliverables are a "commercial item" 
+	as that term is defined at  48 C.F.R. 2.101 (OCT 1995), consisting  of 
+	"commercial computer  software"  and "commercial computer software documentation" 
+	as such terms are  used in 48 C.F.R. 12.212 (SEPT 1995) and is provided to the 
+	U.S. Government only as a commercial end item.  Consistent with 48 C.F.R.12.212 
+	and 48 C.F.R. 227.7202-1 through 227.7202-4 (JUNE 1995), all U.S. Government 
+	End Users acquire the Licensed Deliverables with only those rights set forth 
+	herein. 
+
+	Any use of the Licensed Deliverables in individual and commercial software must 
+	include, in the user documentation and internal comments to the code, the above 
+	Disclaimer and U.S. Government End Users Notice.
+ */
+
+/*
+ *	cuPrintf.cu
+ *
+ *	This is a printf command callable from within a kernel. It is set
+ *	up so that output is sent to a memory buffer, which is emptied from
+ *	the host side - but only after a cudaThreadSynchronize() on the host.
+ *
+ *	Currently, there is a limitation of around 200 characters of output
+ *	and no more than 10 arguments to a single cuPrintf() call. Issue
+ *	multiple calls if longer format strings are required.
+ *
+ *	It requires minimal setup, and is *NOT* optimised for performance.
+ *	For example, writes are not coalesced - this is because there is an
+ *	assumption that people will not want to printf from every single one
+ *	of thousands of threads, but only from individual threads at a time.
+ *
+ *	Using this is simple - it requires one host-side call to initialise
+ *	everything, and then kernels can call cuPrintf at will. Sample code
+ *	is the easiest way to demonstrate:
+ *
+	#include "cuPrintf.cu"
+ 	
+	__global__ void testKernel(int val)
+	{
+		cuPrintf("Value is: %d\n", val);
+	}
+
+	int main()
+	{
+		cudaPrintfInit();
+		testKernel<<< 2, 3 >>>(10);
+		cudaPrintfDisplay(stdout, true);
+		cudaPrintfEnd();
+        return 0;
+	}
+ *
+ *	See the header file, "cuPrintf.cuh" for more info, especially
+ *	arguments to cudaPrintfInit() and cudaPrintfDisplay();
+ */
+
+#ifndef CUPRINTF_CU
+#define CUPRINTF_CU
+
+#include "cuPrintf.cuh"
+#if __CUDA_ARCH__ > 100      // Atomics only used with > sm_10 architecture
+#include <sm_11_atomic_functions.h>
+#endif
+
+// This is the smallest amount of memory, per-thread, which is allowed.
+// It is also the largest amount of space a single printf() can take up
+const static int CUPRINTF_MAX_LEN = 256;
+
+// This structure is used internally to track block/thread output restrictions.
+typedef struct __align__(8) {
+	int threadid;				// CUPRINTF_UNRESTRICTED for unrestricted
+	int blockid;				// CUPRINTF_UNRESTRICTED for unrestricted
+} cuPrintfRestriction;
+
+// The main storage is in a global print buffer, which has a known
+// start/end/length. These are atomically updated so it works as a
+// circular buffer.
+// Since the only control primitive that can be used is atomicAdd(),
+// we cannot wrap the pointer as such. The actual address must be
+// calculated from printfBufferPtr by mod-ing with printfBufferLength.
+// For sm_10 architecture, we must subdivide the buffer per-thread
+// since we do not even have an atomic primitive.
+__constant__ static char *globalPrintfBuffer = NULL;         // Start of circular buffer (set up by host)
+__constant__ static int printfBufferLength = 0;              // Size of circular buffer (set up by host)
+__device__ static cuPrintfRestriction restrictRules;         // Output restrictions
+__device__ volatile static char *printfBufferPtr = NULL;     // Current atomically-incremented non-wrapped offset
+
+// This is the header preceeding all printf entries.
+// NOTE: It *must* be size-aligned to the maximum entity size (size_t)
+typedef struct __align__(8) {
+    unsigned short magic;                   // Magic number says we're valid
+    unsigned short fmtoffset;               // Offset of fmt string into buffer
+    unsigned short blockid;                 // Block ID of author
+    unsigned short threadid;                // Thread ID of author
+} cuPrintfHeader;
+
+// Special header for sm_10 architecture
+#define CUPRINTF_SM10_MAGIC   0xC810        // Not a valid ascii character
+typedef struct __align__(16) {
+    unsigned short magic;                   // sm_10 specific magic number
+    unsigned short unused;
+    unsigned int thread_index;              // thread ID for this buffer
+    unsigned int thread_buf_len;            // per-thread buffer length
+    unsigned int offset;                    // most recent printf's offset
+} cuPrintfHeaderSM10;
+
+
+// Because we can't write an element which is not aligned to its bit-size,
+// we have to align all sizes and variables on maximum-size boundaries.
+// That means sizeof(double) in this case, but we'll use (long long) for
+// better arch<1.3 support
+#define CUPRINTF_ALIGN_SIZE      sizeof(long long)
+
+// All our headers are prefixed with a magic number so we know they're ready
+#define CUPRINTF_SM11_MAGIC  (unsigned short)0xC811        // Not a valid ascii character
+
+
+//
+//  getNextPrintfBufPtr
+//
+//  Grabs a block of space in the general circular buffer, using an
+//  atomic function to ensure that it's ours. We handle wrapping
+//  around the circular buffer and return a pointer to a place which
+//  can be written to.
+//
+//  Important notes:
+//      1. We always grab CUPRINTF_MAX_LEN bytes
+//      2. Because of 1, we never worry about wrapping around the end
+//      3. Because of 1, printfBufferLength *must* be a factor of CUPRINTF_MAX_LEN
+//
+//  This returns a pointer to the place where we own.
+//
+__device__ static char *getNextPrintfBufPtr()
+{
+    // Initialisation check
+    if(!printfBufferPtr)
+        return NULL;
+
+	// Thread/block restriction check
+	if((restrictRules.blockid != CUPRINTF_UNRESTRICTED) && (restrictRules.blockid != (blockIdx.x + gridDim.x*blockIdx.y)))
+		return NULL;
+	if((restrictRules.threadid != CUPRINTF_UNRESTRICTED) && (restrictRules.threadid != (threadIdx.x + blockDim.x*threadIdx.y + blockDim.x*blockDim.y*threadIdx.z)))
+		return NULL;
+
+	// Conditional section, dependent on architecture
+#if __CUDA_ARCH__ == 100
+    // For sm_10 architectures, we have no atomic add - this means we must split the
+    // entire available buffer into per-thread blocks. Inefficient, but what can you do.
+    int thread_count = (gridDim.x * gridDim.y) * (blockDim.x * blockDim.y * blockDim.z);
+    int thread_index = threadIdx.x + blockDim.x*threadIdx.y + blockDim.x*blockDim.y*threadIdx.z +
+                       (blockIdx.x + gridDim.x*blockIdx.y) * (blockDim.x * blockDim.y * blockDim.z);
+    
+    // Find our own block of data and go to it. Make sure the per-thread length
+	// is a precise multiple of CUPRINTF_MAX_LEN, otherwise we risk size and
+	// alignment issues! We must round down, of course.
+    unsigned int thread_buf_len = printfBufferLength / thread_count;
+	thread_buf_len &= ~(CUPRINTF_MAX_LEN-1);
+
+	// We *must* have a thread buffer length able to fit at least two printfs (one header, one real)
+	if(thread_buf_len < (CUPRINTF_MAX_LEN * 2))
+		return NULL;
+
+	// Now address our section of the buffer. The first item is a header.
+    char *myPrintfBuffer = globalPrintfBuffer + (thread_buf_len * thread_index);
+    cuPrintfHeaderSM10 hdr = *(cuPrintfHeaderSM10 *)(void *)myPrintfBuffer;
+    if(hdr.magic != CUPRINTF_SM10_MAGIC)
+    {
+        // If our header is not set up, initialise it
+        hdr.magic = CUPRINTF_SM10_MAGIC;
+        hdr.thread_index = thread_index;
+        hdr.thread_buf_len = thread_buf_len;
+        hdr.offset = 0;         // Note we start at 0! We pre-increment below.
+        *(cuPrintfHeaderSM10 *)(void *)myPrintfBuffer = hdr;       // Write back the header
+
+        // For initial setup purposes, we might need to init thread0's header too
+        // (so that cudaPrintfDisplay() below will work). This is only run once.
+        cuPrintfHeaderSM10 *tophdr = (cuPrintfHeaderSM10 *)(void *)globalPrintfBuffer;
+        tophdr->thread_buf_len = thread_buf_len;
+    }
+
+    // Adjust the offset by the right amount, and wrap it if need be
+    unsigned int offset = hdr.offset + CUPRINTF_MAX_LEN;
+    if(offset >= hdr.thread_buf_len)
+        offset = CUPRINTF_MAX_LEN;
+
+    // Write back the new offset for next time and return a pointer to it
+    ((cuPrintfHeaderSM10 *)(void *)myPrintfBuffer)->offset = offset;
+    return myPrintfBuffer + offset;
+#else
+    // Much easier with an atomic operation!
+    size_t offset = atomicAdd((unsigned int *)&printfBufferPtr, CUPRINTF_MAX_LEN) - (size_t)globalPrintfBuffer;
+    offset %= printfBufferLength;
+    return globalPrintfBuffer + offset;
+#endif
+}
+
+
+//
+//  writePrintfHeader
+//
+//  Inserts the header for containing our UID, fmt position and
+//  block/thread number. We generate it dynamically to avoid
+//	issues arising from requiring pre-initialisation.
+//
+__device__ static void writePrintfHeader(char *ptr, char *fmtptr)
+{
+    if(ptr)
+    {
+        cuPrintfHeader header;
+        header.magic = CUPRINTF_SM11_MAGIC;
+        header.fmtoffset = (unsigned short)(fmtptr - ptr);
+        header.blockid = blockIdx.x + gridDim.x*blockIdx.y;
+        header.threadid = threadIdx.x + blockDim.x*threadIdx.y + blockDim.x*blockDim.y*threadIdx.z;
+        *(cuPrintfHeader *)(void *)ptr = header;
+    }
+}
+
+
+//
+//  cuPrintfStrncpy
+//
+//  This special strncpy outputs an aligned length value, followed by the
+//  string. It then zero-pads the rest of the string until a 64-aligned
+//  boundary. The length *includes* the padding. A pointer to the byte
+//  just after the \0 is returned.
+//
+//  This function could overflow CUPRINTF_MAX_LEN characters in our buffer.
+//  To avoid it, we must count as we output and truncate where necessary.
+//
+__device__ static char *cuPrintfStrncpy(char *dest, const char *src, int n, char *end)
+{
+    // Initialisation and overflow check
+    if(!dest || !src || (dest >= end))
+        return NULL;
+
+    // Prepare to write the length specifier. We're guaranteed to have
+    // at least "CUPRINTF_ALIGN_SIZE" bytes left because we only write out in
+    // chunks that size, and CUPRINTF_MAX_LEN is aligned with CUPRINTF_ALIGN_SIZE.
+    int *lenptr = (int *)(void *)dest;
+    int len = 0;
+    dest += CUPRINTF_ALIGN_SIZE;
+
+    // Now copy the string
+    while(n--)
+    {
+        if(dest >= end)     // Overflow check
+            break;
+
+        len++;
+        *dest++ = *src;
+        if(*src++ == '\0')
+            break;
+    }
+
+    // Now write out the padding bytes, and we have our length.
+    while((dest < end) && (((long)dest & (CUPRINTF_ALIGN_SIZE-1)) != 0))
+    {
+        len++;
+        *dest++ = 0;
+    }
+    *lenptr = len;
+    return (dest < end) ? dest : NULL;        // Overflow means return NULL
+}
+
+
+//
+//  copyArg
+//
+//  This copies a length specifier and then the argument out to the
+//  data buffer. Templates let the compiler figure all this out at
+//  compile-time, making life much simpler from the programming
+//  point of view. I'm assuimg all (const char *) is a string, and
+//  everything else is the variable it points at. I'd love to see
+//  a better way of doing it, but aside from parsing the format
+//  string I can't think of one.
+//
+//  The length of the data type is inserted at the beginning (so that
+//  the display can distinguish between float and double), and the
+//  pointer to the end of the entry is returned.
+//
+__device__ static char *copyArg(char *ptr, const char *arg, char *end)
+{
+    // Initialisation check
+    if(!ptr || !arg)
+        return NULL;
+
+    // strncpy does all our work. We just terminate.
+    if((ptr = cuPrintfStrncpy(ptr, arg, CUPRINTF_MAX_LEN, end)) != NULL)
+        *ptr = 0;
+
+    return ptr;
+}
+
+template <typename T>
+__device__ static char *copyArg(char *ptr, T &arg, char *end)
+{
+    // Initisalisation and overflow check. Alignment rules mean that
+    // we're at least CUPRINTF_ALIGN_SIZE away from "end", so we only need
+    // to check that one offset.
+    if(!ptr || ((ptr+CUPRINTF_ALIGN_SIZE) >= end))
+        return NULL;
+
+    // Write the length and argument
+    *(int *)(void *)ptr = sizeof(arg);
+    ptr += CUPRINTF_ALIGN_SIZE;
+    *(T *)(void *)ptr = arg;
+    ptr += CUPRINTF_ALIGN_SIZE;
+    *ptr = 0;
+
+    return ptr;
+}
+
+
+//
+//  cuPrintf
+//
+//  Templated printf functions to handle multiple arguments.
+//  Note we return the total amount of data copied, not the number
+//  of characters output. But then again, who ever looks at the
+//  return from printf() anyway?
+//
+//  The format is to grab a block of circular buffer space, the
+//  start of which will hold a header and a pointer to the format
+//  string. We then write in all the arguments, and finally the
+//  format string itself. This is to make it easy to prevent
+//  overflow of our buffer (we support up to 10 arguments, each of
+//  which can be 12 bytes in length - that means that only the
+//  format string (or a %s) can actually overflow; so the overflow
+//  check need only be in the strcpy function.
+//
+//  The header is written at the very last because that's what
+//  makes it look like we're done.
+//
+//  Errors, which are basically lack-of-initialisation, are ignored
+//  in the called functions because NULL pointers are passed around
+//
+
+// All printf variants basically do the same thing, setting up the
+// buffer, writing all arguments, then finalising the header. For
+// clarity, we'll pack the code into some big macros.
+#define CUPRINTF_PREAMBLE \
+    char *start, *end, *bufptr, *fmtstart; \
+    if((start = getNextPrintfBufPtr()) == NULL) return 0; \
+    end = start + CUPRINTF_MAX_LEN; \
+    bufptr = start + sizeof(cuPrintfHeader);
+
+// Posting an argument is easy
+#define CUPRINTF_ARG(argname) \
+	bufptr = copyArg(bufptr, argname, end);
+
+// After args are done, record start-of-fmt and write the fmt and header
+#define CUPRINTF_POSTAMBLE \
+    fmtstart = bufptr; \
+    end = cuPrintfStrncpy(bufptr, fmt, CUPRINTF_MAX_LEN, end); \
+    writePrintfHeader(start, end ? fmtstart : NULL); \
+    return end ? (int)(end - start) : 0;
+
+__device__ int cuPrintf(const char *fmt)
+{
+	CUPRINTF_PREAMBLE;
+
+	CUPRINTF_POSTAMBLE;
+}
+template <typename T1> __device__ int cuPrintf(const char *fmt, T1 arg1)
+{
+	CUPRINTF_PREAMBLE;
+	    
+	CUPRINTF_ARG(arg1);
+
+	CUPRINTF_POSTAMBLE;
+}
+template <typename T1, typename T2> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2)
+{
+	CUPRINTF_PREAMBLE;
+	    
+	CUPRINTF_ARG(arg1);
+	CUPRINTF_ARG(arg2);
+
+	CUPRINTF_POSTAMBLE;
+}
+template <typename T1, typename T2, typename T3> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3)
+{
+	CUPRINTF_PREAMBLE;
+	    
+	CUPRINTF_ARG(arg1);
+	CUPRINTF_ARG(arg2);
+	CUPRINTF_ARG(arg3);
+
+	CUPRINTF_POSTAMBLE;
+}
+template <typename T1, typename T2, typename T3, typename T4> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4)
+{
+	CUPRINTF_PREAMBLE;
+	    
+	CUPRINTF_ARG(arg1);
+	CUPRINTF_ARG(arg2);
+	CUPRINTF_ARG(arg3);
+	CUPRINTF_ARG(arg4);
+
+	CUPRINTF_POSTAMBLE;
+}
+template <typename T1, typename T2, typename T3, typename T4, typename T5> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5)
+{
+	CUPRINTF_PREAMBLE;
+	    
+	CUPRINTF_ARG(arg1);
+	CUPRINTF_ARG(arg2);
+	CUPRINTF_ARG(arg3);
+	CUPRINTF_ARG(arg4);
+	CUPRINTF_ARG(arg5);
+
+	CUPRINTF_POSTAMBLE;
+}
+template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6)
+{
+	CUPRINTF_PREAMBLE;
+	    
+	CUPRINTF_ARG(arg1);
+	CUPRINTF_ARG(arg2);
+	CUPRINTF_ARG(arg3);
+	CUPRINTF_ARG(arg4);
+	CUPRINTF_ARG(arg5);
+	CUPRINTF_ARG(arg6);
+	CUPRINTF_POSTAMBLE;
+}
+template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7)
+{
+	CUPRINTF_PREAMBLE;
+	    
+	CUPRINTF_ARG(arg1);
+	CUPRINTF_ARG(arg2);
+	CUPRINTF_ARG(arg3);
+	CUPRINTF_ARG(arg4);
+	CUPRINTF_ARG(arg5);
+	CUPRINTF_ARG(arg6);
+	CUPRINTF_ARG(arg7);
+
+	CUPRINTF_POSTAMBLE;
+}
+template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7, typename T8> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8)
+{
+	CUPRINTF_PREAMBLE;
+
+	CUPRINTF_ARG(arg1);
+	CUPRINTF_ARG(arg2);
+	CUPRINTF_ARG(arg3);
+	CUPRINTF_ARG(arg4);
+	CUPRINTF_ARG(arg5);
+	CUPRINTF_ARG(arg6);
+	CUPRINTF_ARG(arg7);
+	CUPRINTF_ARG(arg8);
+
+	CUPRINTF_POSTAMBLE;
+}
+template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7, typename T8, typename T9> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8, T9 arg9)
+{
+	CUPRINTF_PREAMBLE;
+	    
+	CUPRINTF_ARG(arg1);
+	CUPRINTF_ARG(arg2);
+	CUPRINTF_ARG(arg3);
+	CUPRINTF_ARG(arg4);
+	CUPRINTF_ARG(arg5);
+	CUPRINTF_ARG(arg6);
+	CUPRINTF_ARG(arg7);
+	CUPRINTF_ARG(arg8);
+	CUPRINTF_ARG(arg9);
+
+	CUPRINTF_POSTAMBLE;
+}
+template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7, typename T8, typename T9, typename T10> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8, T9 arg9, T10 arg10)
+{
+	CUPRINTF_PREAMBLE;
+	    
+	CUPRINTF_ARG(arg1);
+	CUPRINTF_ARG(arg2);
+	CUPRINTF_ARG(arg3);
+	CUPRINTF_ARG(arg4);
+	CUPRINTF_ARG(arg5);
+	CUPRINTF_ARG(arg6);
+	CUPRINTF_ARG(arg7);
+	CUPRINTF_ARG(arg8);
+	CUPRINTF_ARG(arg9);
+	CUPRINTF_ARG(arg10);
+
+	CUPRINTF_POSTAMBLE;
+}
+#undef CUPRINTF_PREAMBLE
+#undef CUPRINTF_ARG
+#undef CUPRINTF_POSTAMBLE
+
+
+//
+//	cuPrintfRestrict
+//
+//	Called to restrict output to a given thread/block.
+//	We store the info in "restrictRules", which is set up at
+//	init time by the host. It's not the cleanest way to do this
+//	because it means restrictions will last between
+//	invocations, but given the output-pointer continuity,
+//	I feel this is reasonable.
+//
+__device__ void cuPrintfRestrict(int threadid, int blockid)
+{
+    int thread_count = blockDim.x * blockDim.y * blockDim.z;
+	if(((threadid < thread_count) && (threadid >= 0)) || (threadid == CUPRINTF_UNRESTRICTED))
+		restrictRules.threadid = threadid;
+
+	int block_count = gridDim.x * gridDim.y;
+	if(((blockid < block_count) && (blockid >= 0)) || (blockid == CUPRINTF_UNRESTRICTED))
+		restrictRules.blockid = blockid;
+}
+
+
+///////////////////////////////////////////////////////////////////////////////
+// HOST SIDE
+
+#include <stdio.h>
+static FILE *printf_fp;
+
+static char *printfbuf_start=NULL;
+static char *printfbuf_device=NULL;
+static int printfbuf_len=0;
+
+
+//
+//  outputPrintfData
+//
+//  Our own internal function, which takes a pointer to a data buffer
+//  and passes it through libc's printf for output.
+//
+//  We receive the formate string and a pointer to where the data is
+//  held. We then run through and print it out.
+//
+//  Returns 0 on failure, 1 on success
+//
+static int outputPrintfData(char *fmt, char *data)
+{
+    // Format string is prefixed by a length that we don't need
+    fmt += CUPRINTF_ALIGN_SIZE;
+
+    // Now run through it, printing everything we can. We must
+    // run to every % character, extract only that, and use printf
+    // to format it.
+    char *p = strchr(fmt, '%');
+    while(p != NULL)
+    {
+        // Print up to the % character
+        *p = '\0';
+        fputs(fmt, printf_fp);
+        *p = '%';           // Put back the %
+
+        // Now handle the format specifier
+        char *format = p++;         // Points to the '%'
+        p += strcspn(p, "%cdiouxXeEfgGaAnps");
+        if(*p == '\0')              // If no format specifier, print the whole thing
+        {
+            fmt = format;
+            break;
+        }
+
+        // Cut out the format bit and use printf to print it. It's prefixed
+        // by its length.
+        int arglen = *(int *)data;
+        if(arglen > CUPRINTF_MAX_LEN)
+        {
+            fputs("Corrupt printf buffer data - aborting\n", printf_fp);
+            return 0;
+        }
+
+        data += CUPRINTF_ALIGN_SIZE;
+        
+        char specifier = *p++;
+        char c = *p;        // Store for later
+        *p = '\0';
+        switch(specifier)
+        {
+            // These all take integer arguments
+            case 'c':
+            case 'd':
+            case 'i':
+            case 'o':
+            case 'u':
+            case 'x':
+            case 'X':
+            case 'p':
+                fprintf(printf_fp, format, *((int *)data));
+                break;
+
+            // These all take double arguments
+            case 'e':
+            case 'E':
+            case 'f':
+            case 'g':
+            case 'G':
+            case 'a':
+            case 'A':
+                if(arglen == 4)     // Float vs. Double thing
+                    fprintf(printf_fp, format, *((float *)data));
+                else
+                    fprintf(printf_fp, format, *((double *)data));
+                break;
+
+            // Strings are handled in a special way
+            case 's':
+                fprintf(printf_fp, format, (char *)data);
+                break;
+
+            // % is special
+            case '%':
+                fprintf(printf_fp, "%%");
+                break;
+
+            // Everything else is just printed out as-is
+            default:
+                fprintf(printf_fp, format);
+                break;
+        }
+        data += CUPRINTF_ALIGN_SIZE;         // Move on to next argument
+        *p = c;                     // Restore what we removed
+        fmt = p;                    // Adjust fmt string to be past the specifier
+        p = strchr(fmt, '%');       // and get the next specifier
+    }
+
+    // Print out the last of the string
+    fputs(fmt, printf_fp);
+    return 1;
+}
+
+
+//
+//  doPrintfDisplay
+//
+//  This runs through the blocks of CUPRINTF_MAX_LEN-sized data, calling the
+//  print function above to display them. We've got this separate from
+//  cudaPrintfDisplay() below so we can handle the SM_10 architecture
+//  partitioning.
+//
+static int doPrintfDisplay(int headings, int clear, char *bufstart, char *bufend, char *bufptr, char *endptr)
+{
+    // Grab, piece-by-piece, each output element until we catch
+    // up with the circular buffer end pointer
+    int printf_count=0;
+    char printfbuf_local[CUPRINTF_MAX_LEN+1];
+    printfbuf_local[CUPRINTF_MAX_LEN] = '\0';
+
+    while(bufptr != endptr)
+    {
+        // Wrap ourselves at the end-of-buffer
+        if(bufptr == bufend)
+            bufptr = bufstart;
+
+        // Adjust our start pointer to within the circular buffer and copy a block.
+        cudaMemcpy(printfbuf_local, bufptr, CUPRINTF_MAX_LEN, cudaMemcpyDeviceToHost);
+
+        // If the magic number isn't valid, then this write hasn't gone through
+        // yet and we'll wait until it does (or we're past the end for non-async printfs).
+        cuPrintfHeader *hdr = (cuPrintfHeader *)printfbuf_local;
+        if((hdr->magic != CUPRINTF_SM11_MAGIC) || (hdr->fmtoffset >= CUPRINTF_MAX_LEN))
+        {
+            //fprintf(printf_fp, "Bad magic number in printf header\n");
+            break;
+        }
+
+        // Extract all the info and get this printf done
+        if(headings)
+            fprintf(printf_fp, "[%d, %d]: ", hdr->blockid, hdr->threadid);
+        if(hdr->fmtoffset == 0)
+            fprintf(printf_fp, "printf buffer overflow\n");
+        else if(!outputPrintfData(printfbuf_local+hdr->fmtoffset, printfbuf_local+sizeof(cuPrintfHeader)))
+            break;
+        printf_count++;
+
+        // Clear if asked
+        if(clear)
+            cudaMemset(bufptr, 0, CUPRINTF_MAX_LEN);
+
+        // Now advance our start location, because we're done, and keep copying
+        bufptr += CUPRINTF_MAX_LEN;
+    }
+
+    return printf_count;
+}
+
+
+//
+//  cudaPrintfInit
+//
+//  Takes a buffer length to allocate, creates the memory on the device and
+//  returns a pointer to it for when a kernel is called. It's up to the caller
+//  to free it.
+//
+extern "C" cudaError_t cudaPrintfInit(size_t bufferLen)
+{
+    // Fix up bufferlen to be a multiple of CUPRINTF_MAX_LEN
+    bufferLen = (bufferLen < CUPRINTF_MAX_LEN) ? CUPRINTF_MAX_LEN : bufferLen;
+    if((bufferLen % CUPRINTF_MAX_LEN) > 0)
+        bufferLen += (CUPRINTF_MAX_LEN - (bufferLen % CUPRINTF_MAX_LEN));
+    printfbuf_len = (int)bufferLen;
+
+    // Allocate a print buffer on the device and zero it
+    if(cudaMalloc((void **)&printfbuf_device, printfbuf_len) != cudaSuccess)
+		return cudaErrorInitializationError;
+    cudaMemset(printfbuf_device, 0, printfbuf_len);
+    printfbuf_start = printfbuf_device;         // Where we start reading from
+
+	// No restrictions to begin with
+	cuPrintfRestriction restrict;
+	restrict.threadid = restrict.blockid = CUPRINTF_UNRESTRICTED;
+	cudaMemcpyToSymbol(restrictRules, &restrict, sizeof(restrict));
+
+    // Initialise the buffer and the respective lengths/pointers.
+    cudaMemcpyToSymbol(globalPrintfBuffer, &printfbuf_device, sizeof(char *));
+    cudaMemcpyToSymbol(printfBufferPtr, &printfbuf_device, sizeof(char *));
+    cudaMemcpyToSymbol(printfBufferLength, &printfbuf_len, sizeof(printfbuf_len));
+
+    return cudaSuccess;
+}
+
+
+//
+//  cudaPrintfEnd
+//
+//  Frees up the memory which we allocated
+//
+extern "C" void cudaPrintfEnd()
+{
+    if(!printfbuf_start || !printfbuf_device)
+        return;
+
+    cudaFree(printfbuf_device);
+    printfbuf_start = printfbuf_device = NULL;
+}
+
+
+//
+//  cudaPrintfDisplay
+//
+//  Each call to this function dumps the entire current contents
+//	of the printf buffer to the pre-specified FILE pointer. The
+//	circular "start" pointer is advanced so that subsequent calls
+//	dumps only new stuff.
+//
+//  In the case of async memory access (via streams), call this
+//  repeatedly to keep trying to empty the buffer. If it's a sync
+//  access, then the whole buffer should empty in one go.
+//
+//	Arguments:
+//		outputFP     - File descriptor to output to (NULL => stdout)
+//		showThreadID - If true, prints [block,thread] before each line
+//
+extern "C" cudaError_t cudaPrintfDisplay(void *outputFP, bool showThreadID)
+{
+	printf_fp = (FILE *)((outputFP == NULL) ? stdout : outputFP);
+
+    // For now, we force "synchronous" mode which means we're not concurrent
+	// with kernel execution. This also means we don't need clearOnPrint.
+	// If you're patching it for async operation, here's where you want it.
+    bool sync_printfs = true;
+	bool clearOnPrint = false;
+
+    // Initialisation check
+    if(!printfbuf_start || !printfbuf_device || !printf_fp)
+        return cudaErrorMissingConfiguration;
+
+    // To determine which architecture we're using, we read the
+    // first short from the buffer - it'll be the magic number
+    // relating to the version.
+    unsigned short magic;
+    cudaMemcpy(&magic, printfbuf_device, sizeof(unsigned short), cudaMemcpyDeviceToHost);
+
+    // For SM_10 architecture, we've split our buffer into one-per-thread.
+    // That means we must do each thread block separately. It'll require
+    // extra reading. We also, for now, don't support async printfs because
+    // that requires tracking one start pointer per thread.
+    if(magic == CUPRINTF_SM10_MAGIC)
+    {
+        sync_printfs = true;
+	    clearOnPrint = false;
+        int blocklen = 0;
+        char *blockptr = printfbuf_device;
+        while(blockptr < (printfbuf_device + printfbuf_len))
+        {
+            cuPrintfHeaderSM10 hdr;
+            cudaMemcpy(&hdr, blockptr, sizeof(hdr), cudaMemcpyDeviceToHost);
+
+            // We get our block-size-step from the very first header
+            if(hdr.thread_buf_len != 0)
+                blocklen = hdr.thread_buf_len;
+
+            // No magic number means no printfs from this thread
+            if(hdr.magic != CUPRINTF_SM10_MAGIC)
+            {
+                if(blocklen == 0)
+                {
+                    fprintf(printf_fp, "No printf headers found at all!\n");
+                    break;                              // No valid headers!
+                }
+                blockptr += blocklen;
+                continue;
+            }
+
+            // "offset" is non-zero then we can print the block contents
+            if(hdr.offset > 0)
+            {
+                // For synchronous printfs, we must print from endptr->bufend, then from start->end
+                if(sync_printfs)
+                    doPrintfDisplay(showThreadID, clearOnPrint, blockptr+CUPRINTF_MAX_LEN, blockptr+hdr.thread_buf_len, blockptr+hdr.offset+CUPRINTF_MAX_LEN, blockptr+hdr.thread_buf_len);
+                doPrintfDisplay(showThreadID, clearOnPrint, blockptr+CUPRINTF_MAX_LEN, blockptr+hdr.thread_buf_len, blockptr+CUPRINTF_MAX_LEN, blockptr+hdr.offset+CUPRINTF_MAX_LEN);
+            }
+
+            // Move on to the next block and loop again
+            blockptr += hdr.thread_buf_len;
+        }
+    }
+    // For SM_11 and up, everything is a single buffer and it's simple
+    else if(magic == CUPRINTF_SM11_MAGIC)
+    {
+	    // Grab the current "end of circular buffer" pointer.
+        char *printfbuf_end = NULL;
+        cudaMemcpyFromSymbol(&printfbuf_end, printfBufferPtr, sizeof(char *));
+
+        // Adjust our starting and ending pointers to within the block
+        char *bufptr = ((printfbuf_start - printfbuf_device) % printfbuf_len) + printfbuf_device;
+        char *endptr = ((printfbuf_end - printfbuf_device) % printfbuf_len) + printfbuf_device;
+
+        // For synchronous (i.e. after-kernel-exit) printf display, we have to handle circular
+        // buffer wrap carefully because we could miss those past "end".
+        if(sync_printfs)
+            doPrintfDisplay(showThreadID, clearOnPrint, printfbuf_device, printfbuf_device+printfbuf_len, endptr, printfbuf_device+printfbuf_len);
+        doPrintfDisplay(showThreadID, clearOnPrint, printfbuf_device, printfbuf_device+printfbuf_len, bufptr, endptr);
+
+        printfbuf_start = printfbuf_end;
+    }
+    else
+        ;//printf("Bad magic number in cuPrintf buffer header\n");
+
+    // If we were synchronous, then we must ensure that the memory is cleared on exit
+    // otherwise another kernel launch with a different grid size could conflict.
+    if(sync_printfs)
+        cudaMemset(printfbuf_device, 0, printfbuf_len);
+
+    return cudaSuccess;
+}
+
+// Cleanup
+#undef CUPRINTF_MAX_LEN
+#undef CUPRINTF_ALIGN_SIZE
+#undef CUPRINTF_SM10_MAGIC
+#undef CUPRINTF_SM11_MAGIC
+
+#endif

Godeps/_workspace/src/github.com/ethereum/ethash/libethash-cuda/cuPrintf.cuh

@@ -0,0 +1,162 @@
+/*
+	Copyright 2009 NVIDIA Corporation.  All rights reserved.
+
+	NOTICE TO LICENSEE:   
+
+	This source code and/or documentation ("Licensed Deliverables") are subject 
+	to NVIDIA intellectual property rights under U.S. and international Copyright 
+	laws.  
+
+	These Licensed Deliverables contained herein is PROPRIETARY and CONFIDENTIAL 
+	to NVIDIA and is being provided under the terms and conditions of a form of 
+	NVIDIA software license agreement by and between NVIDIA and Licensee ("License 
+	Agreement") or electronically accepted by Licensee.  Notwithstanding any terms 
+	or conditions to the contrary in the License Agreement, reproduction or 
+	disclosure of the Licensed Deliverables to any third party without the express 
+	written consent of NVIDIA is prohibited.     
+
+	NOTWITHSTANDING ANY TERMS OR CONDITIONS TO THE CONTRARY IN THE LICENSE AGREEMENT, 
+	NVIDIA MAKES NO REPRESENTATION ABOUT THE SUITABILITY OF THESE LICENSED 
+	DELIVERABLES FOR ANY PURPOSE.  IT IS PROVIDED "AS IS" WITHOUT EXPRESS OR IMPLIED 
+	WARRANTY OF ANY KIND. NVIDIA DISCLAIMS ALL WARRANTIES WITH REGARD TO THESE 
+	LICENSED DELIVERABLES, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY, 
+	NONINFRINGEMENT, AND FITNESS FOR A PARTICULAR PURPOSE.   NOTWITHSTANDING ANY 
+	TERMS OR CONDITIONS TO THE CONTRARY IN THE LICENSE AGREEMENT, IN NO EVENT SHALL 
+	NVIDIA BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES, 
+	OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,	WHETHER 
+	IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,  ARISING OUT OF 
+	OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THESE LICENSED DELIVERABLES.  
+
+	U.S. Government End Users. These Licensed Deliverables are a "commercial item" 
+	as that term is defined at  48 C.F.R. 2.101 (OCT 1995), consisting  of 
+	"commercial computer  software"  and "commercial computer software documentation" 
+	as such terms are  used in 48 C.F.R. 12.212 (SEPT 1995) and is provided to the 
+	U.S. Government only as a commercial end item.  Consistent with 48 C.F.R.12.212 
+	and 48 C.F.R. 227.7202-1 through 227.7202-4 (JUNE 1995), all U.S. Government 
+	End Users acquire the Licensed Deliverables with only those rights set forth 
+	herein. 
+
+	Any use of the Licensed Deliverables in individual and commercial software must 
+	include, in the user documentation and internal comments to the code, the above 
+	Disclaimer and U.S. Government End Users Notice.
+ */
+
+#ifndef CUPRINTF_H
+#define CUPRINTF_H
+
+/*
+ *	This is the header file supporting cuPrintf.cu and defining both
+ *	the host and device-side interfaces. See that file for some more
+ *	explanation and sample use code. See also below for details of the
+ *	host-side interfaces.
+ *
+ *  Quick sample code:
+ *
+	#include "cuPrintf.cu"
+ 	
+	__global__ void testKernel(int val)
+	{
+		cuPrintf("Value is: %d\n", val);
+	}
+
+	int main()
+	{
+		cudaPrintfInit();
+		testKernel<<< 2, 3 >>>(10);
+		cudaPrintfDisplay(stdout, true);
+		cudaPrintfEnd();
+        return 0;
+	}
+ */
+
+///////////////////////////////////////////////////////////////////////////////
+// DEVICE SIDE
+// External function definitions for device-side code
+
+// Abuse of templates to simulate varargs
+__device__ int cuPrintf(const char *fmt);
+template <typename T1> __device__ int cuPrintf(const char *fmt, T1 arg1);
+template <typename T1, typename T2> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2);
+template <typename T1, typename T2, typename T3> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3);
+template <typename T1, typename T2, typename T3, typename T4> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4);
+template <typename T1, typename T2, typename T3, typename T4, typename T5> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5);
+template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6);
+template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7);
+template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7, typename T8> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8);
+template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7, typename T8, typename T9> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8, T9 arg9);
+template <typename T1, typename T2, typename T3, typename T4, typename T5, typename T6, typename T7, typename T8, typename T9, typename T10> __device__ int cuPrintf(const char *fmt, T1 arg1, T2 arg2, T3 arg3, T4 arg4, T5 arg5, T6 arg6, T7 arg7, T8 arg8, T9 arg9, T10 arg10);
+
+
+//
+//	cuPrintfRestrict
+//
+//	Called to restrict output to a given thread/block. Pass
+//	the constant CUPRINTF_UNRESTRICTED to unrestrict output
+//	for thread/block IDs. Note you can therefore allow
+//	"all printfs from block 3" or "printfs from thread 2
+//	on all blocks", or "printfs only from block 1, thread 5".
+//
+//	Arguments:
+//		threadid - Thread ID to allow printfs from
+//		blockid - Block ID to allow printfs from
+//
+//	NOTE: Restrictions last between invocations of
+//	kernels unless cudaPrintfInit() is called again.
+//
+#define CUPRINTF_UNRESTRICTED	-1
+__device__ void cuPrintfRestrict(int threadid, int blockid);
+
+
+
+///////////////////////////////////////////////////////////////////////////////
+// HOST SIDE
+// External function definitions for host-side code
+
+//
+//	cudaPrintfInit
+//
+//	Call this once to initialise the printf system. If the output
+//	file or buffer size needs to be changed, call cudaPrintfEnd()
+//	before re-calling cudaPrintfInit().
+//
+//	The default size for the buffer is 1 megabyte. For CUDA
+//	architecture 1.1 and above, the buffer is filled linearly and
+//	is completely used;	however for architecture 1.0, the buffer
+//	is divided into as many segments are there are threads, even
+//	if some threads do not call cuPrintf().
+//
+//	Arguments:
+//		bufferLen - Length, in bytes, of total space to reserve
+//		            (in device global memory) for output.
+//
+//	Returns:
+//		cudaSuccess if all is well.
+//
+extern "C" cudaError_t cudaPrintfInit(size_t bufferLen=1048576);   // 1-meg - that's enough for 4096 printfs by all threads put together
+
+//
+//	cudaPrintfEnd
+//
+//	Cleans up all memories allocated by cudaPrintfInit().
+//	Call this at exit, or before calling cudaPrintfInit() again.
+//
+extern "C" void cudaPrintfEnd();
+
+//
+//	cudaPrintfDisplay
+//
+//	Dumps the contents of the output buffer to the specified
+//	file pointer. If the output pointer is not specified,
+//	the default "stdout" is used.
+//
+//	Arguments:
+//		outputFP     - A file pointer to an output stream.
+//		showThreadID - If "true", output strings are prefixed
+//		               by "[blockid, threadid] " at output.
+//
+//	Returns:
+//		cudaSuccess if all is well.
+//
+extern "C" cudaError_t cudaPrintfDisplay(void *outputFP=NULL, bool showThreadID=false);
+
+#endif  // CUPRINTF_H

Godeps/_workspace/src/github.com/ethereum/ethash/libethash-cuda/libethash.cu

@@ -0,0 +1,27 @@
+#include "cuPrintf.cu"
+#include <stdio.h>
+
+__global__ void device_greetings(void)
+{
+	cuPrintf("Hello, world from the device!\n");
+}
+
+int main(void)
+{
+	// greet from the host
+	printf("Hello, world from the host!\n");
+
+	// initialize cuPrintf
+	cudaPrintfInit();
+
+	// launch a kernel with a single thread to greet from the device
+	device_greetings<<<1,1>>>();
+
+	// display the device's greeting
+	cudaPrintfDisplay();
+
+	// clean up after cuPrintf
+	cudaPrintfEnd();
+
+	return 0;
+}

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/CMakeLists.txt

@@ -0,0 +1,33 @@
+set(LIBRARY ethash)
+set(CMAKE_BUILD_TYPE Release)
+
+if (NOT MSVC)
+	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99")
+endif()
+
+set(FILES 	util.c
+          	util.h
+          	internal.c
+          	ethash.h
+          	endian.h
+          	compiler.h
+          	fnv.h
+          	data_sizes.h)
+
+if (NOT CRYPTOPP_FOUND)
+	find_package(CryptoPP 5.6.2)
+endif()
+
+if (CRYPTOPP_FOUND)
+	add_definitions(-DWITH_CRYPTOPP)
+	include_directories( ${CRYPTOPP_INCLUDE_DIRS} )
+	list(APPEND FILES sha3_cryptopp.cpp sha3_cryptopp.h)
+else()
+	list(APPEND FILES sha3.c sha3.h)
+endif()
+
+add_library(${LIBRARY} ${FILES})
+
+if (CRYPTOPP_FOUND)
+	TARGET_LINK_LIBRARIES(${LIBRARY} ${CRYPTOPP_LIBRARIES})
+endif()

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/compiler.h

@@ -0,0 +1,33 @@
+/*
+  This file is part of cpp-ethereum.
+
+  cpp-ethereum is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  cpp-ethereum is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file compiler.h
+ * @date 2014
+ */
+#pragma once
+
+// Visual Studio doesn't support the inline keyword in C mode
+#if defined(_MSC_VER) && !defined(__cplusplus)
+#define inline __inline
+#endif
+
+// pretend restrict is a standard keyword
+#if defined(_MSC_VER)
+#define restrict __restrict
+#else
+#define restrict __restrict__
+#endif
+

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/data_sizes.h

@@ -0,0 +1,248 @@
+/*
+  This file is part of cpp-ethereum.
+
+  cpp-ethereum is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software FoundationUUU,either version 3 of the LicenseUUU,or
+  (at your option) any later version.
+
+  cpp-ethereum is distributed in the hope that it will be usefulU,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with cpp-ethereum.  If notUUU,see <http://www.gnu.org/licenses/>.
+*/
+
+/** @file nth_prime.h
+* @author Matthew Wampler-Doty <negacthulhu@gmail.com>
+* @date 2015
+*/
+
+// TODO: Update this after ~7 years
+
+#pragma once
+
+#include <stdint.h>
+//#include <Security/Security.h>
+#include "compiler.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <stdint.h>
+
+// 500 Epochs worth of tabulated DAG sizes (~3.5 Years)
+
+// Generated with the following Mathematica Code:
+// GetDataSizes[n_] := Module[{
+//        DAGSizeBytesInit = 2^30,
+//        MixBytes = 128,
+//        DAGGrowth = 113000000,
+//        j = 0},
+//        Reap[
+//          While[j < n,
+//            Module[{i =
+//              Floor[(DAGSizeBytesInit + DAGGrowth * j) / MixBytes]},
+//              While[! PrimeQ[i], i--];
+//              Sow[i*MixBytes]; j++]]]][[2]][[1]]
+
+static const size_t dag_sizes[] = {
+        1073739904U, 1186739584U, 1299741568U, 1412741248U, 1525741696U,
+        1638736768U, 1751741312U, 1864740736U, 1977740672U, 2090740864U,
+        2203740544U, 2316741248U, 2429739392U, 2542740352U, 2655741824U,
+        2768739712U, 2881740416U, 2994741632U, 3107740544U, 3220741504U,
+        3333738112U, 3446741632U, 3559741312U, 3672740224U, 3785740928U,
+        3898738304U, 4011741824U, 4124739712U, 4237735808U, 4350740864U,
+        4463741824U, 4576741504U, 4689741184U, 4802739328U, 4915741568U,
+        5028740224U, 5141740672U, 5254738304U, 5367741824U, 5480737664U,
+        5593738112U, 5706741632U, 5819740544U, 5932734592U, 6045739904U,
+        6158740096U, 6271740032U, 6384731776U, 6497732992U, 6610740352U,
+        6723741056U, 6836741504U, 6949740416U, 7062740096U, 7175741824U,
+        7288740224U, 7401741184U, 7514741632U, 7627741568U, 7740739712U,
+        7853739136U, 7966740352U, 8079741568U, 8192739712U, 8305738624U,
+        8418740864U, 8531740288U, 8644740736U, 8757735808U, 8870738816U,
+        8983739264U, 9096740992U, 9209740928U, 9322739584U, 9435741824U,
+        9548741504U, 9661739392U, 9774738304U, 9887741312U, 10000738688U,
+        10113739136U, 10226741632U, 10339739776U, 10452741248U, 10565740928U,
+        10678736512U, 10791734656U, 10904741248U, 11017738112U, 11130741632U,
+        11243741312U, 11356739456U, 11469740416U, 11582734976U, 11695739008U,
+        11808741248U, 11921734784U, 12034739072U, 12147741568U, 12260737408U,
+        12373741696U, 12486738304U, 12599740544U, 12712740224U, 12825741184U,
+        12938736256U, 13051741312U, 13164737408U, 13277738368U, 13390738048U,
+        13503741824U, 13616741504U, 13729737088U, 13842740096U, 13955741312U,
+        14068741504U, 14181740416U, 14294741632U, 14407739776U, 14520740224U,
+        14633740928U, 14746736512U, 14859741824U, 14972740736U, 15085740928U,
+        15198738304U, 15311732096U, 15424740736U, 15537739904U, 15650741632U,
+        15763741568U, 15876737152U, 15989741696U, 16102740608U, 16215741056U,
+        16328741248U, 16441740416U, 16554737792U, 16667740288U, 16780740992U,
+        16893738112U, 17006741632U, 17119739008U, 17232735616U, 17345739392U,
+        17458740352U, 17571736192U, 17684739712U, 17797739392U, 17910740096U,
+        18023741312U, 18136740736U, 18249738112U, 18362738816U, 18475735424U,
+        18588740224U, 18701738368U, 18814736768U, 18927737216U, 19040739968U,
+        19153739648U, 19266736768U, 19379737984U, 19492739456U, 19605738368U,
+        19718740352U, 19831741312U, 19944736384U, 20057741696U, 20170741376U,
+        20283741824U, 20396737408U, 20509741696U, 20622741376U, 20735739008U,
+        20848741504U, 20961740672U, 21074739328U, 21187740032U, 21300739456U,
+        21413741696U, 21526740608U, 21639741824U, 21752737408U, 21865741696U,
+        21978741376U, 22091741824U, 22204738432U, 22317740672U, 22430740096U,
+        22543736704U, 22656741248U, 22769739904U, 22882739584U, 22995740288U,
+        23108740736U, 23221740928U, 23334741376U, 23447737216U, 23560740992U,
+        23673741184U, 23786740864U, 23899737728U, 24012741248U, 24125734784U,
+        24238736512U, 24351741824U, 24464740736U, 24577737088U, 24690741632U,
+        24803739776U, 24916740736U, 25029740416U, 25142740864U, 25255741568U,
+        25368741248U, 25481740672U, 25594741376U, 25707741568U, 25820741504U,
+        25933730432U, 26046739072U, 26159741824U, 26272741504U, 26385740672U,
+        26498740096U, 26611741568U, 26724740992U, 26837739904U, 26950735232U,
+        27063738496U, 27176741248U, 27289741184U, 27402740864U, 27515740544U,
+        27628737152U, 27741740672U, 27854741632U, 27967740544U, 28080739712U,
+        28193738368U, 28306741376U, 28419737728U, 28532739968U, 28645739648U,
+        28758740096U, 28871741312U, 28984739456U, 29097740416U, 29210740864U,
+        29323741312U, 29436740224U, 29549741696U, 29662738304U, 29775741568U,
+        29888741504U, 30001740928U, 30114737024U, 30227735168U, 30340737664U,
+        30453738368U, 30566737024U, 30679733632U, 30792740224U, 30905740928U,
+        31018740352U, 31131740032U, 31244738944U, 31357737344U, 31470741376U,
+        31583740544U, 31696740224U, 31809738112U, 31922739328U, 32035737472U,
+        32148740992U, 32261741696U, 32374740352U, 32487741824U, 32600740736U,
+        32713739648U, 32826740608U, 32939729792U, 33052740992U, 33165740672U,
+        33278739584U, 33391741312U, 33504739712U, 33617740928U, 33730740608U,
+        33843738496U, 33956739968U, 34069741696U, 34182739328U, 34295741824U,
+        34408739968U, 34521740672U, 34634736512U, 34747741568U, 34860741248U,
+        34973739392U, 35086738304U, 35199741056U, 35312736896U, 35425741184U,
+        35538741376U, 35651740288U, 35764737152U, 35877741184U, 35990739584U,
+        36103740544U, 36216740992U, 36329739392U, 36442737536U, 36555741568U,
+        36668740736U, 36781741184U, 36894737024U, 37007741312U, 37120739456U,
+        37233741184U, 37346736256U, 37459736192U, 37572734336U, 37685739904U,
+        37798740352U, 37911737728U, 38024741504U, 38137739648U, 38250740608U,
+        38363741824U, 38476740992U, 38589741184U, 38702740096U, 38815741312U,
+        38928741248U, 39041738368U, 39154739584U, 39267741824U, 39380739712U,
+        39493735808U, 39606741632U, 39719741312U, 39832741504U, 39945739648U,
+        40058740352U, 40171740032U, 40284740992U, 40397740672U, 40510740352U,
+        40623740288U, 40736738176U, 40849737856U, 40962741376U, 41075739776U,
+        41188737664U, 41301735808U, 41414738048U, 41527741312U, 41640740992U,
+        41753739904U, 41866739072U, 41979738496U, 42092740736U, 42205739648U,
+        42318740608U, 42431741312U, 42544738688U, 42657741184U, 42770738048U,
+        42883741568U, 42996741248U, 43109740928U, 43222736512U, 43335741056U,
+        43448730496U, 43561740416U, 43674741632U, 43787740544U, 43900741504U,
+        44013739648U, 44126740864U, 44239740544U, 44352741248U, 44465738368U,
+        44578735232U, 44691739264U, 44804741504U, 44917741696U, 45030741376U,
+        45143741824U, 45256740992U, 45369739136U, 45482740096U, 45595739776U,
+        45708739712U, 45821740672U, 45934741376U, 46047741056U, 46160741248U,
+        46273737088U, 46386740864U, 46499739008U, 46612739968U, 46725735296U,
+        46838740864U, 46951741568U, 47064737152U, 47177741696U, 47290741376U,
+        47403738752U, 47516741248U, 47629739648U, 47742741632U, 47855737984U,
+        47968740224U, 48081738368U, 48194741632U, 48307739264U, 48420739712U,
+        48533739136U, 48646738304U, 48759741824U, 48872741504U, 48985739392U,
+        49098741376U, 49211741056U, 49324740992U, 49437738368U, 49550740864U,
+        49663735424U, 49776737408U, 49889740672U, 50002738816U, 50115738752U,
+        50228739712U, 50341741696U, 50454736768U, 50567738752U, 50680739968U,
+        50793736832U, 50906734976U, 51019741568U, 51132739456U, 51245741696U,
+        51358741376U, 51471741056U, 51584738944U, 51697734272U, 51810739072U,
+        51923736448U, 52036740736U, 52149741184U, 52262737024U, 52375738496U,
+        52488740992U, 52601739136U, 52714740352U, 52827736448U, 52940738176U,
+        53053741696U, 53166740864U, 53279741824U, 53392741504U, 53505739136U,
+        53618739584U, 53731741312U, 53844741248U, 53957741696U, 54070741376U,
+        54183740288U, 54296741504U, 54409741696U, 54522739072U, 54635737472U,
+        54748741504U, 54861736064U, 54974740096U, 55087741568U, 55200733568U,
+        55313741696U, 55426734464U, 55539741056U, 55652741504U, 55765741184U,
+        55878741376U, 55991730304U, 56104740992U, 56217740672U, 56330731648U,
+        56443737472U, 56556724352U, 56669740672U, 56782739072U, 56895740032U,
+        57008741248U, 57121741696U, 57234740096U, 57347741312U, 57460741504U
+};
+
+// 500 Epochs worth of tabulated DAG sizes (~3.5 Years)
+
+// Generated with the following Mathematica Code:
+// GetCacheSizes[n_] := Module[{
+//        DAGSizeBytesInit = 2^30,
+//        MixBytes = 128,
+//        DAGGrowth = 113000000,
+//        HashBytes = 64,
+//        DAGParents = 1024,
+//        j = 0},
+//    Reap[
+//      While[j < n,
+//       Module[{i = Floor[(DAGSizeBytesInit + DAGGrowth * j) / (DAGParents * HashBytes)]},
+//        While[! PrimeQ[i], i--];
+//        Sow[i*HashBytes]; j++]]]][[2]][[1]]
+
+const size_t cache_sizes[] = {
+        1048384U, 1158208U, 1268416U, 1377856U, 1489856U, 1599296U, 1710656U,
+        1820608U, 1930816U, 2041024U, 2151872U, 2261696U, 2371904U, 2482624U,
+        2593216U, 2703296U, 2814016U, 2924224U, 3034816U, 3144896U, 3255488U,
+        3365312U, 3475904U, 3586624U, 3696064U, 3806272U, 3917504U, 4027456U,
+        4138304U, 4248512U, 4359104U, 4469312U, 4579264U, 4689728U, 4797376U,
+        4909888U, 5020096U, 5131328U, 5241664U, 5351744U, 5461312U, 5572544U,
+        5683264U, 5793472U, 5903552U, 6014144U, 6121664U, 6235072U, 6344896U,
+        6454592U, 6565952U, 6675904U, 6786112U, 6896704U, 7006784U, 7117888U,
+        7228096U, 7338304U, 7448768U, 7557952U, 7669184U, 7779776U, 7889216U,
+        8000192U, 8110912U, 8220736U, 8331712U, 8441536U, 8552384U, 8662592U,
+        8772928U, 8883136U, 8993728U, 9103168U, 9214528U, 9323968U, 9434816U,
+        9545152U, 9655616U, 9766336U, 9876544U, 9986624U, 10097344U, 10207424U,
+        10316864U, 10427968U, 10538432U, 10649152U, 10758976U, 10869568U, 10979776U,
+        11089472U, 11200832U, 11309632U, 11420608U, 11531584U, 11641792U, 11751104U,
+        11862976U, 11973184U, 12083264U, 12193856U, 12304064U, 12414656U, 12524608U,
+        12635072U, 12745792U, 12855616U, 12965824U, 13076416U, 13187008U, 13297216U,
+        13407808U, 13518016U, 13627072U, 13738688U, 13848256U, 13959488U, 14069696U,
+        14180288U, 14290624U, 14399552U, 14511424U, 14621504U, 14732096U, 14841664U,
+        14951744U, 15062336U, 15172672U, 15283264U, 15393088U, 15504448U, 15614272U,
+        15723712U, 15834944U, 15945152U, 16055744U, 16165696U, 16277056U, 16387136U,
+        16494784U, 16607936U, 16718272U, 16828736U, 16938176U, 17048384U, 17159872U,
+        17266624U, 17380544U, 17490496U, 17600192U, 17711296U, 17821376U, 17931968U,
+        18041152U, 18152896U, 18261952U, 18373568U, 18483392U, 18594112U, 18703936U,
+        18814912U, 18924992U, 19034944U, 19145408U, 19256128U, 19366208U, 19477184U,
+        19587136U, 19696576U, 19808192U, 19916992U, 20028352U, 20137664U, 20249024U,
+        20358848U, 20470336U, 20580544U, 20689472U, 20801344U, 20911424U, 21020096U,
+        21130688U, 21242176U, 21352384U, 21462208U, 21573824U, 21683392U, 21794624U,
+        21904448U, 22013632U, 22125248U, 22235968U, 22344512U, 22456768U, 22566848U,
+        22677056U, 22786496U, 22897984U, 23008064U, 23118272U, 23228992U, 23338816U,
+        23449408U, 23560256U, 23670464U, 23780672U, 23891264U, 24001216U, 24110656U,
+        24221888U, 24332608U, 24442688U, 24552512U, 24662464U, 24773696U, 24884032U,
+        24994496U, 25105216U, 25215296U, 25324864U, 25435712U, 25546432U, 25655744U,
+        25767232U, 25876672U, 25986368U, 26098112U, 26207936U, 26318912U, 26428736U,
+        26539712U, 26650048U, 26760256U, 26869184U, 26979776U, 27091136U, 27201728U,
+        27311552U, 27422272U, 27532352U, 27642304U, 27752896U, 27863744U, 27973952U,
+        28082752U, 28194752U, 28305344U, 28415168U, 28524992U, 28636352U, 28746304U,
+        28857152U, 28967104U, 29077184U, 29187904U, 29298496U, 29408576U, 29518912U,
+        29628992U, 29739968U, 29850176U, 29960512U, 30070336U, 30180544U, 30290752U,
+        30398912U, 30512192U, 30622784U, 30732992U, 30842176U, 30953536U, 31063744U,
+        31174336U, 31284544U, 31395136U, 31504448U, 31615552U, 31725632U, 31835072U,
+        31946176U, 32057024U, 32167232U, 32277568U, 32387008U, 32497984U, 32608832U,
+        32719168U, 32829376U, 32939584U, 33050048U, 33160768U, 33271232U, 33381184U,
+        33491648U, 33601856U, 33712576U, 33822016U, 33932992U, 34042816U, 34153024U,
+        34263104U, 34373824U, 34485056U, 34594624U, 34704832U, 34816064U, 34926272U,
+        35036224U, 35146816U, 35255104U, 35367104U, 35478208U, 35588416U, 35698496U,
+        35808832U, 35918656U, 36029888U, 36139456U, 36250688U, 36360512U, 36471104U,
+        36581696U, 36691136U, 36802112U, 36912448U, 37022912U, 37132864U, 37242944U,
+        37354048U, 37464512U, 37574848U, 37684928U, 37794752U, 37904704U, 38015552U,
+        38125888U, 38236864U, 38345792U, 38457152U, 38567744U, 38678336U, 38787776U,
+        38897216U, 39009088U, 39117632U, 39230144U, 39340352U, 39450304U, 39560384U,
+        39671488U, 39781312U, 39891392U, 40002112U, 40112704U, 40223168U, 40332608U,
+        40443968U, 40553792U, 40664768U, 40774208U, 40884416U, 40993984U, 41105984U,
+        41215424U, 41326528U, 41436992U, 41546048U, 41655872U, 41768128U, 41878336U,
+        41988928U, 42098752U, 42209344U, 42319168U, 42429248U, 42540352U, 42649792U,
+        42761024U, 42871616U, 42981824U, 43092032U, 43201856U, 43312832U, 43423552U,
+        43533632U, 43643584U, 43753792U, 43864384U, 43974976U, 44084032U, 44195392U,
+        44306368U, 44415296U, 44526016U, 44637248U, 44746816U, 44858048U, 44967872U,
+        45078848U, 45188288U, 45299264U, 45409216U, 45518272U, 45630272U, 45740224U,
+        45850432U, 45960896U, 46069696U, 46182208U, 46292416U, 46402624U, 46512064U,
+        46623296U, 46733888U, 46843712U, 46953664U, 47065024U, 47175104U, 47285696U,
+        47395904U, 47506496U, 47615296U, 47726912U, 47837632U, 47947712U, 48055232U,
+        48168128U, 48277952U, 48387392U, 48499648U, 48609472U, 48720064U, 48830272U,
+        48940096U, 49050944U, 49160896U, 49271744U, 49381568U, 49492288U, 49602752U,
+        49712576U, 49822016U, 49934272U, 50042816U, 50154304U, 50264128U, 50374336U,
+        50484416U, 50596288U, 50706752U, 50816704U, 50927168U, 51035456U, 51146944U,
+        51258176U, 51366976U, 51477824U, 51589568U, 51699776U, 51809728U, 51920576U,
+        52030016U, 52140736U, 52251328U, 52361152U, 52470592U, 52582592U, 52691776U,
+        52803136U, 52912576U, 53020736U, 53132224U, 53242688U, 53354816U, 53465536U,
+        53575232U, 53685568U, 53796544U, 53906752U, 54016832U, 54126656U, 54236992U,
+        54347456U, 54457408U, 54569024U, 54679232U, 54789184U, 54899776U, 55008832U,
+        55119296U, 55231168U, 55341248U, 55451584U, 55562048U, 55672256U, 55782208U,
+        55893184U, 56002112U, 56113216U
+};
+
+#ifdef __cplusplus
+}
+#endif

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/endian.h

@@ -0,0 +1,74 @@
+#pragma once
+
+#include <stdint.h>
+#include "compiler.h"
+
+static const uint8_t BitReverseTable256[] =
+        {
+                0x00, 0x80, 0x40, 0xC0, 0x20, 0xA0, 0x60, 0xE0, 0x10, 0x90, 0x50, 0xD0, 0x30, 0xB0, 0x70, 0xF0,
+                0x08, 0x88, 0x48, 0xC8, 0x28, 0xA8, 0x68, 0xE8, 0x18, 0x98, 0x58, 0xD8, 0x38, 0xB8, 0x78, 0xF8,
+                0x04, 0x84, 0x44, 0xC4, 0x24, 0xA4, 0x64, 0xE4, 0x14, 0x94, 0x54, 0xD4, 0x34, 0xB4, 0x74, 0xF4,
+                0x0C, 0x8C, 0x4C, 0xCC, 0x2C, 0xAC, 0x6C, 0xEC, 0x1C, 0x9C, 0x5C, 0xDC, 0x3C, 0xBC, 0x7C, 0xFC,
+                0x02, 0x82, 0x42, 0xC2, 0x22, 0xA2, 0x62, 0xE2, 0x12, 0x92, 0x52, 0xD2, 0x32, 0xB2, 0x72, 0xF2,
+                0x0A, 0x8A, 0x4A, 0xCA, 0x2A, 0xAA, 0x6A, 0xEA, 0x1A, 0x9A, 0x5A, 0xDA, 0x3A, 0xBA, 0x7A, 0xFA,
+                0x06, 0x86, 0x46, 0xC6, 0x26, 0xA6, 0x66, 0xE6, 0x16, 0x96, 0x56, 0xD6, 0x36, 0xB6, 0x76, 0xF6,
+                0x0E, 0x8E, 0x4E, 0xCE, 0x2E, 0xAE, 0x6E, 0xEE, 0x1E, 0x9E, 0x5E, 0xDE, 0x3E, 0xBE, 0x7E, 0xFE,
+                0x01, 0x81, 0x41, 0xC1, 0x21, 0xA1, 0x61, 0xE1, 0x11, 0x91, 0x51, 0xD1, 0x31, 0xB1, 0x71, 0xF1,
+                0x09, 0x89, 0x49, 0xC9, 0x29, 0xA9, 0x69, 0xE9, 0x19, 0x99, 0x59, 0xD9, 0x39, 0xB9, 0x79, 0xF9,
+                0x05, 0x85, 0x45, 0xC5, 0x25, 0xA5, 0x65, 0xE5, 0x15, 0x95, 0x55, 0xD5, 0x35, 0xB5, 0x75, 0xF5,
+                0x0D, 0x8D, 0x4D, 0xCD, 0x2D, 0xAD, 0x6D, 0xED, 0x1D, 0x9D, 0x5D, 0xDD, 0x3D, 0xBD, 0x7D, 0xFD,
+                0x03, 0x83, 0x43, 0xC3, 0x23, 0xA3, 0x63, 0xE3, 0x13, 0x93, 0x53, 0xD3, 0x33, 0xB3, 0x73, 0xF3,
+                0x0B, 0x8B, 0x4B, 0xCB, 0x2B, 0xAB, 0x6B, 0xEB, 0x1B, 0x9B, 0x5B, 0xDB, 0x3B, 0xBB, 0x7B, 0xFB,
+                0x07, 0x87, 0x47, 0xC7, 0x27, 0xA7, 0x67, 0xE7, 0x17, 0x97, 0x57, 0xD7, 0x37, 0xB7, 0x77, 0xF7,
+                0x0F, 0x8F, 0x4F, 0xCF, 0x2F, 0xAF, 0x6F, 0xEF, 0x1F, 0x9F, 0x5F, 0xDF, 0x3F, 0xBF, 0x7F, 0xFF
+        };
+
+static inline uint32_t bitfn_swap32(uint32_t a) {
+    return (BitReverseTable256[a & 0xff] << 24) |
+            (BitReverseTable256[(a >> 8) & 0xff] << 16) |
+            (BitReverseTable256[(a >> 16) & 0xff] << 8) |
+            (BitReverseTable256[(a >> 24) & 0xff]);
+}
+
+static inline uint64_t bitfn_swap64(uint64_t a) {
+    return ((uint64_t) bitfn_swap32((uint32_t) (a >> 32))) |
+            (((uint64_t) bitfn_swap32((uint32_t) a)) << 32);
+}
+
+#if defined(__MINGW32__) || defined(_WIN32)
+  # define LITTLE_ENDIAN 1234
+  # define BYTE_ORDER    LITTLE_ENDIAN
+#elif defined(__FreeBSD__) || defined(__DragonFly__) || defined(__NetBSD__)
+  # include <sys/endian.h>
+#elif defined(__OpenBSD__) || defined(__SVR4)
+  # include <sys/types.h>
+#elif defined(__APPLE__)
+# include <machine/endian.h>
+#elif defined( BSD ) && (BSD >= 199103)
+  # include <machine/endian.h>
+#elif defined( __QNXNTO__ ) && defined( __LITTLEENDIAN__ )
+  # define LITTLE_ENDIAN 1234
+  # define BYTE_ORDER    LITTLE_ENDIAN
+#elif defined( __QNXNTO__ ) && defined( __BIGENDIAN__ )
+  # define BIG_ENDIAN 1234
+  # define BYTE_ORDER    BIG_ENDIAN
+#else
+
+# include <endian.h>
+
+#endif
+
+
+#if LITTLE_ENDIAN == BYTE_ORDER
+
+#define fix_endian32(x) (x)
+#define fix_endian64(x) (x)
+
+#elif BIG_ENDIAN == BYTE_ORDER
+
+#define fix_endian32(x) bitfn_swap32(x)
+#define fix_endian64(x) bitfn_swap64(x)
+
+#else
+# error "endian not supported"
+#endif // BYTE_ORDER

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/ethash.h

@@ -0,0 +1,88 @@
+/*
+  This file is part of cpp-ethereum.
+
+  cpp-ethereum is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  cpp-ethereum is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file ethash.h
+* @date 2015
+*/
+#pragma once
+
+#include <stdint.h>
+#include <stdbool.h>
+#include <string.h>
+#include <stddef.h>
+#include "compiler.h"
+
+#define REVISION 18
+#define DAGSIZE_BYTES_INIT 1073741824U
+#define DAG_GROWTH 113000000U
+#define EPOCH_LENGTH 30000U
+#define MIX_BYTES 128
+#define DAG_PARENTS 256
+#define CACHE_ROUNDS 3
+#define ACCESSES 64
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+typedef struct ethash_params {
+    size_t full_size;               // Size of full data set (in bytes, multiple of mix size (128)).
+    size_t cache_size;              // Size of compute cache (in bytes, multiple of node size (64)).
+} ethash_params;
+
+typedef struct ethash_return_value {
+    uint8_t result[32];
+    uint8_t mix_hash[32];
+} ethash_return_value;
+
+size_t const ethash_get_datasize(const uint32_t block_number);
+size_t const ethash_get_cachesize(const uint32_t block_number);
+
+// initialize the parameters
+static inline void ethash_params_init(ethash_params *params, const uint32_t block_number) {
+    params->full_size = ethash_get_datasize(block_number);
+    params->cache_size = ethash_get_cachesize(block_number);
+}
+
+typedef struct ethash_cache {
+    void *mem;
+} ethash_cache;
+
+void ethash_mkcache(ethash_cache *cache, ethash_params const *params, const uint8_t seed[32]);
+void ethash_compute_full_data(void *mem, ethash_params const *params, ethash_cache const *cache);
+void ethash_full(ethash_return_value *ret, void const *full_mem, ethash_params const *params, const uint8_t header_hash[32], const uint64_t nonce);
+void ethash_light(ethash_return_value *ret, ethash_cache const *cache, ethash_params const *params, const uint8_t header_hash[32], const uint64_t nonce);
+
+static inline int ethash_check_difficulty(
+        const uint8_t hash[32],
+        const uint8_t difficulty[32]) {
+    // Difficulty is big endian
+    for (int i = 0; i < 32; i++) {
+        if (hash[i] == difficulty[i]) continue;
+        return hash[i] < difficulty[i];
+    }
+    return 0;
+}
+
+int ethash_quick_check_difficulty(
+        const uint8_t header_hash[32],
+        const uint64_t nonce,
+        const uint8_t mix_hash[32],
+        const uint8_t difficulty[32]);
+
+#ifdef __cplusplus
+}
+#endif

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/fnv.h

@@ -0,0 +1,38 @@
+/*
+  This file is part of cpp-ethereum.
+
+  cpp-ethereum is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  cpp-ethereum is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file fnv.h
+* @author Matthew Wampler-Doty <negacthulhu@gmail.com>
+* @date 2015
+*/
+
+#pragma once
+#include <stdint.h>
+#include "compiler.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define FNV_PRIME 0x01000193
+
+static inline uint32_t fnv_hash(const uint32_t x, const uint32_t y) {
+	return x*FNV_PRIME ^ y;
+}
+
+#ifdef __cplusplus
+}
+#endif

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/internal.c

@@ -0,0 +1,297 @@
+/*
+  This file is part of cpp-ethereum.
+
+  cpp-ethereum is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  cpp-ethereum is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file dash.cpp
+* @author Tim Hughes <tim@twistedfury.com>
+* @author Matthew Wampler-Doty
+* @date 2015
+*/
+
+#include <assert.h>
+#include <inttypes.h>
+#include <stddef.h>
+#include "ethash.h"
+#include "fnv.h"
+#include "endian.h"
+#include "internal.h"
+#include "data_sizes.h"
+
+#ifdef WITH_CRYPTOPP
+
+#include "SHA3_cryptopp.h"
+
+#else
+#include "sha3.h"
+#endif // WITH_CRYPTOPP
+
+size_t const ethash_get_datasize(const uint32_t block_number) {
+    assert(block_number / EPOCH_LENGTH < 500);
+    return dag_sizes[block_number / EPOCH_LENGTH];
+}
+
+size_t const ethash_get_cachesize(const uint32_t block_number) {
+    assert(block_number / EPOCH_LENGTH < 500);
+    return cache_sizes[block_number / EPOCH_LENGTH];
+}
+
+// Follows Sergio's "STRICT MEMORY HARD HASHING FUNCTIONS" (2014)
+// https://bitslog.files.wordpress.com/2013/12/memohash-v0-3.pdf
+// SeqMemoHash(s, R, N)
+void static ethash_compute_cache_nodes(
+        node *const nodes,
+        ethash_params const *params,
+        const uint8_t seed[32]) {
+    assert((params->cache_size % sizeof(node)) == 0);
+    uint32_t const num_nodes = (uint32_t)(params->cache_size / sizeof(node));
+
+    SHA3_512(nodes[0].bytes, seed, 32);
+
+    for (unsigned i = 1; i != num_nodes; ++i) {
+        SHA3_512(nodes[i].bytes, nodes[i - 1].bytes, 64);
+    }
+
+    for (unsigned j = 0; j != CACHE_ROUNDS; j++) {
+        for (unsigned i = 0; i != num_nodes; i++) {
+            uint32_t const idx = nodes[i].words[0] % num_nodes;
+            node data;
+            data = nodes[(num_nodes - 1 + i) % num_nodes];
+			for (unsigned w = 0; w != NODE_WORDS; ++w)
+			{
+				data.words[w] ^= nodes[idx].words[w];
+			}
+            SHA3_512(nodes[i].bytes, data.bytes, sizeof(data));
+        }
+    }
+
+    // now perform endian conversion
+#if BYTE_ORDER != LITTLE_ENDIAN
+    for (unsigned w = 0; w != (num_nodes*NODE_WORDS); ++w)
+    {
+        nodes->words[w] = fix_endian32(nodes->words[w]);
+    }
+#endif
+}
+
+void ethash_mkcache(
+  ethash_cache *cache,
+        ethash_params const *params,
+        const uint8_t seed[32]) {
+    node *nodes = (node *) cache->mem;
+    ethash_compute_cache_nodes(nodes, params, seed);
+}
+
+void ethash_calculate_dag_item(
+        node *const ret,
+        const unsigned node_index,
+        const struct ethash_params *params,
+        const struct ethash_cache *cache) {
+
+    uint32_t num_parent_nodes = (uint32_t)(params->cache_size / sizeof(node));
+    node const *cache_nodes = (node const *) cache->mem;
+    node const *init = &cache_nodes[node_index % num_parent_nodes];
+
+	memcpy(ret, init, sizeof(node));
+	ret->words[0] ^= node_index;
+	SHA3_512(ret->bytes, ret->bytes, sizeof(node));
+
+#if defined(_M_X64) && ENABLE_SSE
+    __m128i const fnv_prime = _mm_set1_epi32(FNV_PRIME);
+    __m128i xmm0 = ret->xmm[0];
+    __m128i xmm1 = ret->xmm[1];
+    __m128i xmm2 = ret->xmm[2];
+    __m128i xmm3 = ret->xmm[3];
+#endif
+
+    for (unsigned i = 0; i != DAG_PARENTS; ++i)
+	{
+        uint32_t parent_index = ((node_index ^ i)*FNV_PRIME ^ ret->words[i % NODE_WORDS]) % num_parent_nodes;
+        node const *parent = &cache_nodes[parent_index];
+
+		#if defined(_M_X64) && ENABLE_SSE
+        {
+            xmm0 = _mm_mullo_epi32(xmm0, fnv_prime);
+            xmm1 = _mm_mullo_epi32(xmm1, fnv_prime);
+            xmm2 = _mm_mullo_epi32(xmm2, fnv_prime);
+            xmm3 = _mm_mullo_epi32(xmm3, fnv_prime);
+            xmm0 = _mm_xor_si128(xmm0, parent->xmm[0]);
+            xmm1 = _mm_xor_si128(xmm1, parent->xmm[1]);
+            xmm2 = _mm_xor_si128(xmm2, parent->xmm[2]);
+            xmm3 = _mm_xor_si128(xmm3, parent->xmm[3]);
+
+            // have to write to ret as values are used to compute index
+            ret->xmm[0] = xmm0;
+            ret->xmm[1] = xmm1;
+            ret->xmm[2] = xmm2;
+            ret->xmm[3] = xmm3;
+        }
+        #else
+        {
+            for (unsigned w = 0; w != NODE_WORDS; ++w) {
+                ret->words[w] = fnv_hash(ret->words[w], parent->words[w]);
+            }
+        }
+		#endif
+    }
+
+	SHA3_512(ret->bytes, ret->bytes, sizeof(node));
+}
+
+void ethash_compute_full_data(
+        void *mem,
+        ethash_params const *params,
+        ethash_cache const *cache) {
+    assert((params->full_size % (sizeof(uint32_t) * MIX_WORDS)) == 0);
+    assert((params->full_size % sizeof(node)) == 0);
+    node *full_nodes = mem;
+
+    // now compute full nodes
+    for (unsigned n = 0; n != (params->full_size / sizeof(node)); ++n) {
+        ethash_calculate_dag_item(&(full_nodes[n]), n, params, cache);
+    }
+}
+
+static void ethash_hash(
+        ethash_return_value * ret,
+        node const *full_nodes,
+        ethash_cache const *cache,
+        ethash_params const *params,
+        const uint8_t header_hash[32],
+        const uint64_t nonce) {
+
+    assert((params->full_size % MIX_WORDS) == 0);
+
+    // pack hash and nonce together into first 40 bytes of s_mix
+    assert(sizeof(node)*8 == 512);
+    node s_mix[MIX_NODES + 1];
+    memcpy(s_mix[0].bytes, header_hash, 32);
+
+#if BYTE_ORDER != LITTLE_ENDIAN
+    s_mix[0].double_words[4] = fix_endian64(nonce);
+#else
+    s_mix[0].double_words[4] = nonce;
+#endif
+
+    // compute sha3-512 hash and replicate across mix
+    SHA3_512(s_mix->bytes, s_mix->bytes, 40);
+
+#if BYTE_ORDER != LITTLE_ENDIAN
+    for (unsigned w = 0; w != 16; ++w) {
+        s_mix[0].words[w] = fix_endian32(s_mix[0].words[w]);
+    }
+#endif
+
+    node* const mix = s_mix + 1;
+    for (unsigned w = 0; w != MIX_WORDS; ++w) {
+        mix->words[w] = s_mix[0].words[w % NODE_WORDS];
+    }
+
+    unsigned const
+            page_size = sizeof(uint32_t) * MIX_WORDS,
+            num_full_pages = (unsigned)(params->full_size / page_size);
+
+
+    for (unsigned i = 0; i != ACCESSES; ++i)
+	{
+        uint32_t const index = ((s_mix->words[0] ^ i)*FNV_PRIME ^ mix->words[i % MIX_WORDS]) % num_full_pages;
+
+        for (unsigned n = 0; n != MIX_NODES; ++n)
+		{
+            const node * dag_node = &full_nodes[MIX_NODES * index + n];
+
+            if (!full_nodes) {
+                node tmp_node;
+                ethash_calculate_dag_item(&tmp_node, index * MIX_NODES + n, params, cache);
+                dag_node = &tmp_node;
+            }
+
+			#if defined(_M_X64) && ENABLE_SSE
+            {
+                __m128i fnv_prime = _mm_set1_epi32(FNV_PRIME);
+                __m128i xmm0 = _mm_mullo_epi32(fnv_prime, mix[n].xmm[0]);
+                __m128i xmm1 = _mm_mullo_epi32(fnv_prime, mix[n].xmm[1]);
+                __m128i xmm2 = _mm_mullo_epi32(fnv_prime, mix[n].xmm[2]);
+                __m128i xmm3 = _mm_mullo_epi32(fnv_prime, mix[n].xmm[3]);
+                mix[n].xmm[0] = _mm_xor_si128(xmm0, dag_node->xmm[0]);
+                mix[n].xmm[1] = _mm_xor_si128(xmm1, dag_node->xmm[1]);
+                mix[n].xmm[2] = _mm_xor_si128(xmm2, dag_node->xmm[2]);
+                mix[n].xmm[3] = _mm_xor_si128(xmm3, dag_node->xmm[3]);
+            }
+            #else
+            {
+                for (unsigned w = 0; w != NODE_WORDS; ++w) {
+                    mix[n].words[w] = fnv_hash(mix[n].words[w], dag_node->words[w]);
+                }
+            }
+            #endif
+        }
+
+    }
+
+	// compress mix
+	for (unsigned w = 0; w != MIX_WORDS; w += 4)
+	{
+		uint32_t reduction = mix->words[w+0];
+		reduction = reduction*FNV_PRIME ^ mix->words[w+1];
+		reduction = reduction*FNV_PRIME ^ mix->words[w+2];
+		reduction = reduction*FNV_PRIME ^ mix->words[w+3];
+		mix->words[w/4] = reduction;
+	}
+
+#if BYTE_ORDER != LITTLE_ENDIAN
+    for (unsigned w = 0; w != MIX_WORDS/4; ++w) {
+        mix->words[w] = fix_endian32(mix->words[w]);
+    }
+#endif
+
+    memcpy(ret->mix_hash, mix->bytes, 32);
+    // final Keccak hash
+    SHA3_256(ret->result, s_mix->bytes, 64+32);	// Keccak-256(s + compressed_mix)
+}
+
+void ethash_quick_hash(
+        uint8_t return_hash[32],
+        const uint8_t header_hash[32],
+        const uint64_t nonce,
+        const uint8_t mix_hash[32]) {
+
+    uint8_t buf[64+32];
+    memcpy(buf, header_hash, 32);
+#if BYTE_ORDER != LITTLE_ENDIAN
+    nonce = fix_endian64(nonce);
+#endif
+    memcpy(&(buf[32]), &nonce, 8);
+    SHA3_512(buf, buf, 40);
+    memcpy(&(buf[64]), mix_hash, 32);
+    SHA3_256(return_hash, buf, 64+32);
+}
+
+int ethash_quick_check_difficulty(
+        const uint8_t header_hash[32],
+        const uint64_t nonce,
+        const uint8_t mix_hash[32],
+        const uint8_t difficulty[32]) {
+    uint8_t return_hash[32];
+    ethash_quick_hash(return_hash, header_hash, nonce, mix_hash);
+    return ethash_check_difficulty(return_hash, difficulty);
+}
+
+void ethash_full(ethash_return_value * ret, void const *full_mem, ethash_params const *params, const uint8_t previous_hash[32], const uint64_t nonce) {
+    ethash_hash(ret, (node const *) full_mem, NULL, params, previous_hash, nonce);
+}
+
+void ethash_light(ethash_return_value * ret, ethash_cache const *cache, ethash_params const *params, const uint8_t previous_hash[32], const uint64_t nonce) {
+    ethash_hash(ret, NULL, cache, params, previous_hash, nonce);
+}

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/internal.h

@@ -0,0 +1,48 @@
+#pragma once
+#include "compiler.h"
+#include "endian.h"
+#include "ethash.h"
+
+#define ENABLE_SSE 1
+
+#if defined(_M_X64) && ENABLE_SSE
+#include <smmintrin.h>
+#endif
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// compile time settings
+#define NODE_WORDS (64/4)
+#define MIX_WORDS (MIX_BYTES/4)
+#define MIX_NODES (MIX_WORDS / NODE_WORDS)
+#include <stdint.h>
+
+typedef union node {
+    uint8_t bytes[NODE_WORDS * 4];
+    uint32_t words[NODE_WORDS];
+    uint64_t double_words[NODE_WORDS / 2];
+
+#if defined(_M_X64) && ENABLE_SSE
+	__m128i xmm[NODE_WORDS/4];
+#endif
+
+} node;
+
+void ethash_calculate_dag_item(
+        node *const ret,
+        const unsigned node_index,
+        ethash_params const *params,
+        ethash_cache const *cache
+);
+
+void ethash_quick_hash(
+        uint8_t return_hash[32],
+        const uint8_t header_hash[32],
+        const uint64_t nonce,
+        const uint8_t mix_hash[32]);
+
+#ifdef __cplusplus
+}
+#endif

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/sha3.c

@@ -0,0 +1,151 @@
+/** libkeccak-tiny
+*
+* A single-file implementation of SHA-3 and SHAKE.
+*
+* Implementor: David Leon Gil
+* License: CC0, attribution kindly requested. Blame taken too,
+* but not liability.
+*/
+#include "sha3.h"
+
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+/******** The Keccak-f[1600] permutation ********/
+
+/*** Constants. ***/
+static const uint8_t rho[24] = \
+  { 1,  3,   6, 10, 15, 21,
+        28, 36, 45, 55,  2, 14,
+        27, 41, 56,  8, 25, 43,
+        62, 18, 39, 61, 20, 44};
+static const uint8_t pi[24] = \
+  {10,  7, 11, 17, 18, 3,
+        5, 16,  8, 21, 24, 4,
+        15, 23, 19, 13, 12, 2,
+        20, 14, 22,  9, 6,  1};
+static const uint64_t RC[24] = \
+  {1ULL, 0x8082ULL, 0x800000000000808aULL, 0x8000000080008000ULL,
+        0x808bULL, 0x80000001ULL, 0x8000000080008081ULL, 0x8000000000008009ULL,
+        0x8aULL, 0x88ULL, 0x80008009ULL, 0x8000000aULL,
+        0x8000808bULL, 0x800000000000008bULL, 0x8000000000008089ULL, 0x8000000000008003ULL,
+        0x8000000000008002ULL, 0x8000000000000080ULL, 0x800aULL, 0x800000008000000aULL,
+        0x8000000080008081ULL, 0x8000000000008080ULL, 0x80000001ULL, 0x8000000080008008ULL};
+
+/*** Helper macros to unroll the permutation. ***/
+#define rol(x, s) (((x) << s) | ((x) >> (64 - s)))
+#define REPEAT6(e) e e e e e e
+#define REPEAT24(e) REPEAT6(e e e e)
+#define REPEAT5(e) e e e e e
+#define FOR5(v, s, e) \
+  v = 0;            \
+  REPEAT5(e; v += s;)
+
+/*** Keccak-f[1600] ***/
+static inline void keccakf(void* state) {
+    uint64_t* a = (uint64_t*)state;
+    uint64_t b[5] = {0};
+    uint64_t t = 0;
+    uint8_t x, y;
+
+    for (int i = 0; i < 24; i++) {
+        // Theta
+        FOR5(x, 1,
+                b[x] = 0;
+                FOR5(y, 5,
+                        b[x] ^= a[x + y]; ))
+        FOR5(x, 1,
+                FOR5(y, 5,
+                        a[y + x] ^= b[(x + 4) % 5] ^ rol(b[(x + 1) % 5], 1); ))
+        // Rho and pi
+        t = a[1];
+        x = 0;
+        REPEAT24(b[0] = a[pi[x]];
+                a[pi[x]] = rol(t, rho[x]);
+                t = b[0];
+                x++; )
+        // Chi
+        FOR5(y,
+                5,
+                FOR5(x, 1,
+                        b[x] = a[y + x];)
+                FOR5(x, 1,
+                a[y + x] = b[x] ^ ((~b[(x + 1) % 5]) & b[(x + 2) % 5]); ))
+        // Iota
+        a[0] ^= RC[i];
+    }
+}
+
+/******** The FIPS202-defined functions. ********/
+
+/*** Some helper macros. ***/
+
+#define _(S) do { S } while (0)
+#define FOR(i, ST, L, S) \
+  _(for (size_t i = 0; i < L; i += ST) { S; })
+#define mkapply_ds(NAME, S)                                          \
+  static inline void NAME(uint8_t* dst,                              \
+                          const uint8_t* src,                        \
+                          size_t len) {                              \
+    FOR(i, 1, len, S);                                               \
+  }
+#define mkapply_sd(NAME, S)                                          \
+  static inline void NAME(const uint8_t* src,                        \
+                          uint8_t* dst,                              \
+                          size_t len) {                              \
+    FOR(i, 1, len, S);                                               \
+  }
+
+mkapply_ds(xorin, dst[i] ^= src[i])  // xorin
+mkapply_sd(setout, dst[i] = src[i])  // setout
+
+#define P keccakf
+#define Plen 200
+
+// Fold P*F over the full blocks of an input.
+#define foldP(I, L, F) \
+  while (L >= rate) {  \
+    F(a, I, rate);     \
+    P(a);              \
+    I += rate;         \
+    L -= rate;         \
+  }
+
+/** The sponge-based hash construction. **/
+static inline int hash(uint8_t* out, size_t outlen,
+        const uint8_t* in, size_t inlen,
+        size_t rate, uint8_t delim) {
+    if ((out == NULL) || ((in == NULL) && inlen != 0) || (rate >= Plen)) {
+        return -1;
+    }
+    uint8_t a[Plen] = {0};
+    // Absorb input.
+    foldP(in, inlen, xorin);
+    // Xor in the DS and pad frame.
+    a[inlen] ^= delim;
+    a[rate - 1] ^= 0x80;
+    // Xor in the last block.
+    xorin(a, in, inlen);
+    // Apply P
+    P(a);
+    // Squeeze output.
+    foldP(out, outlen, setout);
+    setout(a, out, outlen);
+    memset(a, 0, 200);
+    return 0;
+}
+
+#define defsha3(bits)                                             \
+  int sha3_##bits(uint8_t* out, size_t outlen,                    \
+                  const uint8_t* in, size_t inlen) {              \
+    if (outlen > (bits/8)) {                                      \
+      return -1;                                                  \
+    }                                                             \
+    return hash(out, outlen, in, inlen, 200 - (bits / 4), 0x01);  \
+  }
+
+/*** FIPS202 SHA3 FOFs ***/
+defsha3(256)
+defsha3(512)

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/sha3.h

@@ -0,0 +1,27 @@
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include "compiler.h"
+#include <stdint.h>
+#include <stdlib.h>
+
+#define decsha3(bits) \
+  int sha3_##bits(uint8_t*, size_t, const uint8_t*, size_t);
+
+decsha3(256)
+decsha3(512)
+
+static inline void SHA3_256(uint8_t * const ret, uint8_t const *data, const size_t size) {
+    sha3_256(ret, 32, data, size);
+}
+
+static inline void SHA3_512(uint8_t * const ret, uint8_t const *data, const size_t size) {
+    sha3_512(ret, 64, data, size);
+}
+
+#ifdef __cplusplus
+}
+#endif

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/sha3_cryptopp.cpp

@@ -0,0 +1,34 @@
+/*
+  This file is part of cpp-ethereum.
+
+  cpp-ethereum is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  cpp-ethereum is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/** @file sha3.cpp
+* @author Tim Hughes <tim@twistedfury.com>
+* @date 2015
+*/
+
+#include <stdint.h>
+#include <cryptopp/sha3.h>
+
+extern "C" {
+void SHA3_256(uint8_t *const ret, const uint8_t *data, size_t size) {
+  CryptoPP::SHA3_256().CalculateDigest(ret, data, size);
+}
+
+void SHA3_512(uint8_t *const ret, const uint8_t *data, size_t size) {
+  CryptoPP::SHA3_512().CalculateDigest(ret, data, size);
+}
+}

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/sha3_cryptopp.h

@@ -0,0 +1,15 @@
+#pragma once
+
+#include "compiler.h"
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void SHA3_256(uint8_t *const ret, const uint8_t *data, size_t size);
+void SHA3_512(uint8_t *const ret, const uint8_t *data, size_t size);
+
+#ifdef __cplusplus
+}
+#endif

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/util.c

@@ -0,0 +1,41 @@
+/*
+  This file is part of cpp-ethereum.
+
+  cpp-ethereum is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  cpp-ethereum is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file util.c
+ * @author Tim Hughes <tim@twistedfury.com>
+ * @date 2015
+ */
+#include <stdarg.h>
+#include <stdio.h>
+#include "util.h"
+
+#ifdef _MSC_VER
+
+// foward declare without all of Windows.h
+__declspec(dllimport) void __stdcall OutputDebugStringA(const char* lpOutputString);
+
+void debugf(const char *str, ...)
+{
+	va_list args;
+    va_start(args, str);
+
+	char buf[1<<16];
+	_vsnprintf_s(buf, sizeof(buf), sizeof(buf), str, args);
+	buf[sizeof(buf)-1] = '\0';
+	OutputDebugStringA(buf);
+}
+
+#endif

Godeps/_workspace/src/github.com/ethereum/ethash/libethash/util.h

@@ -0,0 +1,47 @@
+/*
+  This file is part of cpp-ethereum.
+
+  cpp-ethereum is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or
+  (at your option) any later version.
+
+  cpp-ethereum is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/** @file util.h
+ * @author Tim Hughes <tim@twistedfury.com>
+ * @date 2015
+ */
+#pragma once
+#include <stdint.h>
+#include "compiler.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef _MSC_VER
+void debugf(const char *str, ...);
+#else
+#define debugf printf
+#endif
+
+static inline uint32_t min_u32(uint32_t a, uint32_t b)
+{
+	return a < b ? a : b;
+}
+
+static inline uint32_t clamp_u32(uint32_t x, uint32_t min_, uint32_t max_)
+{
+	return x < min_ ? min_ : (x > max_ ? max_ : x);
+}
+
+#ifdef __cplusplus
+}
+#endif

Godeps/_workspace/src/github.com/ethereum/ethash/node-ethash/binding.gyp

@@ -0,0 +1,29 @@
+{
+  "targets":
+    [{
+      "target_name": "ethash",
+        "sources": [
+            './ethash.cc',
+            '../libethash/ethash.h',
+            '../libethash/util.c',
+            '../libethash/util.h',
+            '../libethash/blum_blum_shub.h',
+            '../libethash/blum_blum_shub.c',
+            '../libethash/sha3.h',
+            '../libethash/sha3.c',
+            '../libethash/internal.h',
+            '../libethash/internal.c'
+          ],
+        "include_dirs": [
+          "../",
+          "<!(node -e \"require('nan')\")"
+        ],
+        "cflags": [
+        "-Wall",
+        "-Wno-maybe-uninitialized",
+        "-Wno-uninitialized",
+        "-Wno-unused-function",
+        "-Wextra"
+          ]
+    }]
+}

Godeps/_workspace/src/github.com/ethereum/ethash/node-ethash/ethash.cc

@@ -0,0 +1,587 @@
+#include <nan.h>
+#include <iostream>
+#include <node.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include "../libethash/ethash.h"
+
+using namespace v8;
+
+class EthashValidator : public NanAsyncWorker {
+ public:
+  // Constructor
+  EthashValidator(NanCallback *callback, const unsigned blocknumber, const unsigned char * seed)
+    : NanAsyncWorker(callback), blocknumber(blocknumber), seed(seed) {}
+  // Destructor
+  ~EthashValidator() {
+  	free(this->cache);
+	free(this->params);
+  }
+
+  // Executed inside the worker-thread.
+  // It is not safe to access V8, or V8 data structures
+  // here, so everything we need for input and output
+  // should go on `this`.
+  void Execute () {
+	
+    /* this->result = secp256k1_ecdsa_sign(this->msg, this->sig , &this->sig_len, this->pk, NULL, NULL); */
+  }
+
+  // Executed when the async work is complete
+  // this function will be run inside the main event loop
+  // so it is safe to use V8 again
+  void HandleOKCallback () {
+    NanScope();
+    Handle<Value> argv[] = {
+      NanNew<Number>(this->result)
+    };
+    callback->Call(2, argv);
+  }
+
+ protected:
+  const unsigned blocknumber; 
+  const unsigned char * seed;
+  ethash_params * params;
+  ethash_cache * cache;
+  bool result;
+  bool ready = 0;
+};
+
+/* class CompactSignWorker : public SignWorker { */
+/*  public: */
+/*   CompactSignWorker(NanCallback *callback, const unsigned char *msg, const unsigned char *pk ) */
+/*     : SignWorker(callback, msg, pk){} */
+
+/*   void Execute () { */
+/*     this->result = secp256k1_ecdsa_sign_compact(this->msg, this->sig , this->pk, NULL, NULL,  &this->sig_len); */
+/*   } */
+
+/*   void HandleOKCallback () { */
+/*     NanScope(); */
+/*     Handle<Value> argv[] = { */
+/*       NanNew<Number>(this->result), */
+/*       NanNewBufferHandle((char *)this->sig, 64), */
+/*       NanNew<Number>(this->sig_len) */
+/*     }; */
+/*     callback->Call(3, argv); */
+/*   } */
+/* }; */
+
+/* class RecoverWorker : public NanAsyncWorker { */
+/*  public: */
+/*   // Constructor */
+/*   RecoverWorker(NanCallback *callback, const unsigned char *msg, const unsigned char *sig, int compressed, int rec_id) */
+/*     : NanAsyncWorker(callback), msg(msg), sig(sig), compressed(compressed), rec_id(rec_id) {} */
+/*   // Destructor */
+/*   ~RecoverWorker() {} */
+
+/*   void Execute () { */
+/*     if(this->compressed == 1){ */
+/*       this->pubkey = new unsigned char[33]; */ 
+/*     }else{ */
+/*       this->pubkey = new unsigned char[65]; */ 
+/*     } */
+
+/*     this->result = secp256k1_ecdsa_recover_compact(this->msg, this->sig, this->pubkey, &this->pubkey_len, this->compressed, this->rec_id); */
+/*   } */
+
+/*   void HandleOKCallback () { */
+/*     NanScope(); */
+/*     Handle<Value> argv[] = { */
+/*       NanNew<Number>(this->result), */
+/*       NanNewBufferHandle((char *)this->pubkey, this->pubkey_len) */
+/*     }; */
+/*     callback->Call(2, argv); */
+/*   } */
+
+/*  protected: */
+/*   const unsigned char * msg; */
+/*   const unsigned char * sig; */ 
+/*   int compressed; */
+/*   int rec_id; */
+/*   int result; */
+/*   unsigned char * pubkey; */
+/*   int pubkey_len; */
+/* }; */
+
+/* class VerifyWorker : public NanAsyncWorker { */
+/*  public: */
+/*   // Constructor */
+/*   VerifyWorker(NanCallback *callback, const unsigned char *msg, const unsigned char *sig, int sig_len, const unsigned char *pub_key, int pub_key_len) */
+/*     : NanAsyncWorker(callback), msg(msg), sig(sig), sig_len(sig_len), pub_key(pub_key), pub_key_len(pub_key_len) {} */
+/*   // Destructor */
+/*   ~VerifyWorker() {} */
+
+/*   void Execute () { */
+/*     this->result = secp256k1_ecdsa_verify(this->msg, this->sig, this->sig_len,  this->pub_key, this->pub_key_len); */
+/*   } */
+
+/*   void HandleOKCallback () { */
+/*     NanScope(); */
+/*     Handle<Value> argv[] = { */
+/*       NanNew<Number>(this->result), */
+/*     }; */
+/*     callback->Call(1, argv); */
+/*   } */
+
+/*  protected: */
+/*   int result; */
+/*   const unsigned char * msg; */
+/*   const unsigned char * sig; */
+/*   int sig_len; */ 
+/*   const unsigned char * pub_key; */
+/*   int pub_key_len; */
+/* }; */
+
+/* NAN_METHOD(Verify){ */
+/*   NanScope(); */
+
+/*   Local<Object> pub_buf = args[0].As<Object>(); */
+/*   const unsigned char *pub_data = (unsigned char *) node::Buffer::Data(pub_buf); */
+/*   int pub_len = node::Buffer::Length(args[0]); */
+
+/*   Local<Object> msg_buf = args[1].As<Object>(); */
+/*   const unsigned char *msg_data = (unsigned char *) node::Buffer::Data(msg_buf); */
+
+/*   Local<Object> sig_buf = args[2].As<Object>(); */
+/*   const unsigned char *sig_data = (unsigned char *) node::Buffer::Data(sig_buf); */
+/*   int sig_len = node::Buffer::Length(args[2]); */
+
+/*   int result = secp256k1_ecdsa_verify(msg_data, sig_data, sig_len, pub_data, pub_len ); */ 
+
+/*   NanReturnValue(NanNew<Number>(result)); */
+/* } */
+
+/* NAN_METHOD(Verify_Async){ */
+/*   NanScope(); */
+
+/*   Local<Object> pub_buf = args[0].As<Object>(); */
+/*   const unsigned char *pub_data = (unsigned char *) node::Buffer::Data(pub_buf); */
+/*   int pub_len = node::Buffer::Length(args[0]); */
+
+/*   Local<Object> msg_buf = args[1].As<Object>(); */
+/*   const unsigned char *msg_data = (unsigned char *) node::Buffer::Data(msg_buf); */
+
+/*   Local<Object> sig_buf = args[2].As<Object>(); */
+/*   const unsigned char *sig_data = (unsigned char *) node::Buffer::Data(sig_buf); */
+/*   int sig_len = node::Buffer::Length(args[2]); */
+
+/*   Local<Function> callback = args[3].As<Function>(); */
+/*   NanCallback* nanCallback = new NanCallback(callback); */
+
+/*   VerifyWorker* worker = new VerifyWorker(nanCallback, msg_data, sig_data, sig_len, pub_data, pub_len); */
+/*   NanAsyncQueueWorker(worker); */
+
+/*   NanReturnUndefined(); */
+/* } */
+
+/* NAN_METHOD(Sign){ */
+/*   NanScope(); */
+
+/*   //the first argument should be the private key as a buffer */
+/*   Local<Object> pk_buf = args[0].As<Object>(); */
+/*   const unsigned char *pk_data = (unsigned char *) node::Buffer::Data(pk_buf); */
+/*   int sec_len = node::Buffer::Length(args[0]); */
+/*   //the second argument is the message that we are signing */
+/*   Local<Object> msg_buf = args[1].As<Object>(); */
+/*   const unsigned char *msg_data = (unsigned char *) node::Buffer::Data(msg_buf); */
+
+/*   unsigned char sig[72]; */
+/*   int sig_len = 72; */
+/*   int msg_len = node::Buffer::Length(args[1]); */
+
+/*   if(sec_len != 32){ */
+/*     return NanThrowError("the secret key needs tobe 32 bytes"); */
+/*   } */
+
+/*   if(msg_len == 0){ */
+/*     return NanThrowError("messgae cannot be null"); */ 
+/*   } */
+
+/*   int result = secp256k1_ecdsa_sign(msg_data, sig , &sig_len, pk_data, NULL, NULL); */
+
+/*   if(result == 1){ */
+/*     NanReturnValue(NanNewBufferHandle((char *)sig, sig_len)); */
+/*   }else{ */
+/*     return NanThrowError("nonce invalid, try another one"); */
+/*   } */
+/* } */
+
+/* NAN_METHOD(Sign_Async){ */
+
+/*   NanScope(); */
+/*   //the first argument should be the private key as a buffer */
+/*   Local<Object> sec_buf = args[0].As<Object>(); */
+/*   const unsigned char *sec_data = (unsigned char *) node::Buffer::Data(sec_buf); */
+/*   int sec_len = node::Buffer::Length(args[0]); */
+/*   //the second argument is the message that we are signing */
+/*   Local<Object> msg_buf = args[1].As<Object>(); */
+/*   const unsigned char *msg_data = (unsigned char *) node::Buffer::Data(msg_buf); */
+
+/*   Local<Function> callback = args[2].As<Function>(); */
+/*   NanCallback* nanCallback = new NanCallback(callback); */
+
+/*   int msg_len = node::Buffer::Length(args[1]); */
+
+/*   if(sec_len != 32){ */
+/*     return NanThrowError("the secret key needs tobe 32 bytes"); */
+/*   } */
+
+/*   if(msg_len == 0){ */
+/*     return NanThrowError("messgae cannot be null"); */ 
+/*   } */
+
+/*   SignWorker* worker = new SignWorker(nanCallback, msg_data, sec_data); */
+/*   NanAsyncQueueWorker(worker); */
+
+/*   NanReturnUndefined(); */
+/* } */
+
+/* NAN_METHOD(Sign_Compact){ */
+
+/*   NanScope(); */
+
+/*   Local<Object> seckey_buf = args[0].As<Object>(); */
+/*   const unsigned char *seckey_data = (unsigned char *) node::Buffer::Data(seckey_buf); */
+/*   int sec_len = node::Buffer::Length(args[0]); */
+
+/*   Local<Object> msg_buf = args[1].As<Object>(); */
+/*   const unsigned char *msg_data = (unsigned char *) node::Buffer::Data(msg_buf); */
+/*   int msg_len = node::Buffer::Length(args[1]); */
+
+/*   if(sec_len != 32){ */
+/*     return NanThrowError("the secret key needs tobe 32 bytes"); */
+/*   } */
+
+/*   if(msg_len == 0){ */
+/*     return NanThrowError("messgae cannot be null"); */ 
+/*   } */
+
+/*   unsigned char sig[64]; */
+/*   int rec_id; */
+
+/*   //TODO: change the nonce */
+/*   int valid_nonce = secp256k1_ecdsa_sign_compact(msg_data, sig, seckey_data, NULL, NULL, &rec_id ); */
+
+/*   Local<Array> array = NanNew<Array>(3); */
+/*   array->Set(0, NanNew<Integer>(valid_nonce)); */
+/*   array->Set(1, NanNew<Integer>(rec_id)); */
+/*   array->Set(2, NanNewBufferHandle((char *)sig, 64)); */
+
+/*   NanReturnValue(array); */
+/* } */
+
+/* NAN_METHOD(Sign_Compact_Async){ */
+/*   NanScope(); */
+/*   //the first argument should be the private key as a buffer */
+/*   Local<Object> sec_buf = args[0].As<Object>(); */
+/*   const unsigned char *sec_data = (unsigned char *) node::Buffer::Data(sec_buf); */
+/*   int sec_len = node::Buffer::Length(args[0]); */
+
+/*   //the second argument is the message that we are signing */
+/*   Local<Object> msg_buf = args[1].As<Object>(); */
+/*   const unsigned char *msg_data = (unsigned char *) node::Buffer::Data(msg_buf); */
+
+
+/*   Local<Function> callback = args[2].As<Function>(); */
+/*   NanCallback* nanCallback = new NanCallback(callback); */
+
+/*   int msg_len = node::Buffer::Length(args[1]); */
+
+/*   if(sec_len != 32){ */
+/*     return NanThrowError("the secret key needs tobe 32 bytes"); */
+/*   } */
+
+/*   if(msg_len == 0){ */
+/*     return NanThrowError("messgae cannot be null"); */ 
+/*   } */
+
+/*   CompactSignWorker* worker = new CompactSignWorker(nanCallback, msg_data, sec_data); */ 
+/*   NanAsyncQueueWorker(worker); */
+
+/*   NanReturnUndefined(); */
+/* } */
+
+/* NAN_METHOD(Recover_Compact){ */
+
+/*   NanScope(); */
+  
+/*   Local<Object> msg_buf = args[0].As<Object>(); */
+/*   const unsigned char *msg = (unsigned char *) node::Buffer::Data(msg_buf); */
+/*   int msg_len = node::Buffer::Length(args[0]); */
+
+/*   Local<Object> sig_buf = args[1].As<Object>(); */
+/*   const unsigned char *sig = (unsigned char *) node::Buffer::Data(sig_buf); */
+
+/*   Local<Number> compressed = args[2].As<Number>(); */
+/*   int int_compressed = compressed->IntegerValue(); */
+
+/*   Local<Number> rec_id = args[3].As<Number>(); */
+/*   int int_rec_id = rec_id->IntegerValue(); */
+
+/*   if(msg_len == 0){ */
+/*     return NanThrowError("messgae cannot be null"); */ 
+/*   } */
+
+/*   unsigned char pubKey[65]; */ 
+
+/*   int pubKeyLen; */
+
+/*   int result = secp256k1_ecdsa_recover_compact(msg, sig, pubKey, &pubKeyLen, int_compressed, int_rec_id); */
+/*   if(result == 1){ */
+/*     NanReturnValue(NanNewBufferHandle((char *)pubKey, pubKeyLen)); */
+/*   }else{ */
+    
+/*     NanReturnValue(NanFalse()); */
+/*   } */
+/* } */
+
+/* NAN_METHOD(Recover_Compact_Async){ */
+
+/*   NanScope(); */
+  
+/*   //the message */
+/*   Local<Object> msg_buf = args[0].As<Object>(); */
+/*   const unsigned char *msg = (unsigned char *) node::Buffer::Data(msg_buf); */
+/*   int msg_len = node::Buffer::Length(args[0]); */
+
+/*   //the signature length */
+/*   Local<Object> sig_buf = args[1].As<Object>(); */
+/*   const unsigned char *sig = (unsigned char *) node::Buffer::Data(sig_buf); */
+/*   //todo sig len needs tobe 64 */
+/*   int sig_len = node::Buffer::Length(args[1]); */
+
+/*   //to compress or not? */
+/*   Local<Number> compressed = args[2].As<Number>(); */
+/*   int int_compressed = compressed->IntegerValue(); */
+
+/*   //the rec_id */
+/*   Local<Number> rec_id = args[3].As<Number>(); */
+/*   int int_rec_id = rec_id->IntegerValue(); */
+
+/*   //the callback */
+/*   Local<Function> callback = args[4].As<Function>(); */
+/*   NanCallback* nanCallback = new NanCallback(callback); */
+
+/*   if(sig_len != 64){ */
+/*     return NanThrowError("the signature needs to be 64 bytes"); */
+/*   } */
+
+/*   if(msg_len == 0){ */
+/*     return NanThrowError("messgae cannot be null"); */ 
+/*   } */
+
+/*   RecoverWorker* worker = new RecoverWorker(nanCallback, msg, sig, int_compressed, int_rec_id); */
+/*   NanAsyncQueueWorker(worker); */
+
+/*   NanReturnUndefined(); */
+/* } */
+
+/* NAN_METHOD(Seckey_Verify){ */
+/*   NanScope(); */
+
+/*   const unsigned char *data = (const unsigned char*) node::Buffer::Data(args[0]); */
+/*   int result =  secp256k1_ec_seckey_verify(data); */ 
+/*   NanReturnValue(NanNew<Number>(result)); */ 
+/* } */
+
+/* NAN_METHOD(Pubkey_Verify){ */
+
+/*   NanScope(); */
+  
+/*   Local<Object> pub_buf = args[0].As<Object>(); */
+/*   const unsigned char *pub_key = (unsigned char *) node::Buffer::Data(pub_buf); */
+/*   int pub_key_len = node::Buffer::Length(args[0]); */
+
+/*   int result = secp256k1_ec_pubkey_verify(pub_key, pub_key_len); */
+
+/*   NanReturnValue(NanNew<Number>(result)); */ 
+/* } */
+
+/* NAN_METHOD(Pubkey_Create){ */
+/*   NanScope(); */
+
+/*   Handle<Object> pk_buf = args[0].As<Object>(); */
+/*   const unsigned char *pk_data = (unsigned char *) node::Buffer::Data(pk_buf); */
+/*   int pk_len = node::Buffer::Length(args[0]); */
+
+/*   Local<Number> l_compact = args[1].As<Number>(); */
+/*   int compact = l_compact->IntegerValue(); */
+/*   int pubKeyLen; */
+
+/*   if(pk_len != 32){ */
+/*     return NanThrowError("the secert key need to be 32 bytes"); */
+/*   } */
+
+/*   unsigned char *pubKey; */
+/*   if(compact == 1){ */
+/*     pubKey = new unsigned char[33]; */ 
+/*   }else{ */
+/*     pubKey = new unsigned char[65]; */ 
+/*   } */
+
+/*   int results = secp256k1_ec_pubkey_create(pubKey,&pubKeyLen, pk_data, compact ); */
+/*   if(results == 0){ */
+/*     return NanThrowError("secret was invalid, try again."); */
+/*   }else{ */
+/*     NanReturnValue(NanNewBufferHandle((char *)pubKey, pubKeyLen)); */
+/*   } */
+/* } */
+
+/* NAN_METHOD(Pubkey_Decompress){ */
+/*   NanScope(); */
+
+/*   //the first argument should be the private key as a buffer */
+/*   Local<Object> pk_buf = args[0].As<Object>(); */
+/*   unsigned char *pk_data = (unsigned char *) node::Buffer::Data(pk_buf); */
+
+/*   int pk_len = node::Buffer::Length(args[0]); */
+
+/*   int results = secp256k1_ec_pubkey_decompress(pk_data, &pk_len); */
+
+/*   if(results == 0){ */
+/*     return NanThrowError("invalid public key"); */
+/*   }else{ */
+/*     NanReturnValue(NanNewBufferHandle((char *)pk_data, pk_len)); */
+/*   } */
+/* } */
+
+
+/* NAN_METHOD(Privkey_Import){ */
+/*   NanScope(); */
+
+/*   //the first argument should be the private key as a buffer */
+/*   Handle<Object> pk_buf = args[0].As<Object>(); */
+/*   const unsigned char *pk_data = (unsigned char *) node::Buffer::Data(pk_buf); */
+
+/*   int pk_len = node::Buffer::Length(args[0]); */
+
+/*   unsigned char sec_key[32]; */
+/*   int results = secp256k1_ec_privkey_import(sec_key, pk_data, pk_len); */
+
+/*   if(results == 0){ */
+/*     return NanThrowError("invalid private key"); */
+/*   }else{ */
+/*     NanReturnValue(NanNewBufferHandle((char *)sec_key, 32)); */
+/*   } */
+/* } */
+
+/* NAN_METHOD(Privkey_Export){ */
+/*   NanScope(); */
+
+/*   //the first argument should be the private key as a buffer */
+/*   Handle<Object> sk_buf = args[0].As<Object>(); */
+/*   const unsigned char *sk_data = (unsigned char *) node::Buffer::Data(sk_buf); */
+
+/*   Local<Number> l_compressed = args[1].As<Number>(); */
+/*   int compressed = l_compressed->IntegerValue(); */
+
+/*   unsigned char *privKey; */
+/*   int pk_len; */
+/*   int results = secp256k1_ec_privkey_export(sk_data, privKey, &pk_len, compressed); */
+/*   if(results == 0){ */
+/*     return NanThrowError("invalid private key"); */
+/*   }else{ */
+/*     NanReturnValue(NanNewBufferHandle((char *)privKey, pk_len)); */
+/*   } */
+/* } */
+
+/* NAN_METHOD(Privkey_Tweak_Add){ */
+/*   NanScope(); */
+
+/*   //the first argument should be the private key as a buffer */
+/*   Handle<Object> sk_buf = args[0].As<Object>(); */
+/*   unsigned char *sk = (unsigned char *) node::Buffer::Data(sk_buf); */
+
+/*   Handle<Object> tweak_buf = args[1].As<Object>(); */
+/*   const unsigned char *tweak= (unsigned char *) node::Buffer::Data(tweak_buf); */
+
+/*   int results = secp256k1_ec_privkey_tweak_add(sk, tweak); */
+/*   if(results == 0){ */
+/*     return NanThrowError("invalid key"); */
+/*   }else{ */
+/*     NanReturnValue(NanNewBufferHandle((char *)sk, 32)); */
+/*   } */
+/* } */
+
+/* NAN_METHOD(Privkey_Tweak_Mul){ */
+/*   NanScope(); */
+
+/*   //the first argument should be the private key as a buffer */
+/*   Handle<Object> sk_buf = args[0].As<Object>(); */
+/*   unsigned char *sk = (unsigned char *) node::Buffer::Data(sk_buf); */
+
+/*   Handle<Object> tweak_buf = args[1].As<Object>(); */
+/*   const unsigned char *tweak= (unsigned char *) node::Buffer::Data(tweak_buf); */
+
+/*   int results = secp256k1_ec_privkey_tweak_mul(sk, tweak); */
+/*   if(results == 0){ */
+/*     return NanThrowError("invalid key"); */
+/*   }else{ */
+/*     NanReturnValue(NanNewBufferHandle((char *)sk, 32)); */
+/*   } */
+/* } */
+
+/* NAN_METHOD(Pubkey_Tweak_Add){ */
+/*   NanScope(); */
+
+/*   //the first argument should be the private key as a buffer */
+/*   Handle<Object> pk_buf = args[0].As<Object>(); */
+/*   unsigned char *pk = (unsigned char *) node::Buffer::Data(pk_buf); */
+/*   int pk_len = node::Buffer::Length(args[0]); */
+
+/*   Handle<Object> tweak_buf = args[1].As<Object>(); */
+/*   const unsigned char *tweak= (unsigned char *) node::Buffer::Data(tweak_buf); */
+
+/*   int results = secp256k1_ec_pubkey_tweak_add(pk, pk_len, tweak); */
+/*   if(results == 0){ */
+/*     return NanThrowError("invalid key"); */
+/*   }else{ */
+/*     NanReturnValue(NanNewBufferHandle((char *)pk, pk_len)); */
+/*   } */
+/* } */
+
+/* NAN_METHOD(Pubkey_Tweak_Mul){ */
+/*   NanScope(); */
+
+/*   //the first argument should be the private key as a buffer */
+/*   Handle<Object> pk_buf = args[0].As<Object>(); */
+/*   unsigned char *pk = (unsigned char *) node::Buffer::Data(pk_buf); */
+/*   int pk_len = node::Buffer::Length(args[0]); */
+
+/*   Handle<Object> tweak_buf = args[1].As<Object>(); */
+/*   const unsigned char *tweak= (unsigned char *) node::Buffer::Data(tweak_buf); */
+
+/*   int results = secp256k1_ec_pubkey_tweak_mul(pk, pk_len, tweak); */
+/*   if(results == 0){ */
+/*     return NanThrowError("invalid key"); */
+/*   }else{ */
+/*     NanReturnValue(NanNewBufferHandle((char *)pk, pk_len)); */
+/*   } */
+/* } */
+
+void Init(Handle<Object> exports) {
+
+  /* secp256k1_start(SECP256K1_START_SIGN | SECP256K1_START_VERIFY); */
+  /* exports->Set(NanNew("seckeyVerify"), NanNew<FunctionTemplate>(Seckey_Verify)->GetFunction()); */
+  /* exports->Set(NanNew("sign"), NanNew<FunctionTemplate>(Sign)->GetFunction()); */
+  /* exports->Set(NanNew("signAsync"), NanNew<FunctionTemplate>(Sign_Async)->GetFunction()); */
+  /* exports->Set(NanNew("signCompact"), NanNew<FunctionTemplate>(Sign_Compact)->GetFunction()); */
+  /* exports->Set(NanNew("signCompactAsync"), NanNew<FunctionTemplate>(Sign_Compact_Async)->GetFunction()); */
+  /* exports->Set(NanNew("recoverCompact"), NanNew<FunctionTemplate>(Recover_Compact)->GetFunction()); */
+  /* exports->Set(NanNew("recoverCompactAsync"), NanNew<FunctionTemplate>(Recover_Compact_Async)->GetFunction()); */
+  /* exports->Set(NanNew("verify"), NanNew<FunctionTemplate>(Verify)->GetFunction()); */
+  /* exports->Set(NanNew("verifyAsync"), NanNew<FunctionTemplate>(Verify_Async)->GetFunction()); */
+  /* exports->Set(NanNew("secKeyVerify"), NanNew<FunctionTemplate>(Seckey_Verify)->GetFunction()); */
+  /* exports->Set(NanNew("pubKeyVerify"), NanNew<FunctionTemplate>(Pubkey_Verify)->GetFunction()); */
+  /* exports->Set(NanNew("pubKeyCreate"), NanNew<FunctionTemplate>(Pubkey_Create)->GetFunction()); */
+  /* exports->Set(NanNew("pubKeyDecompress"), NanNew<FunctionTemplate>(Pubkey_Decompress)->GetFunction()); */
+  /* exports->Set(NanNew("privKeyExport"), NanNew<FunctionTemplate>(Privkey_Export)->GetFunction()); */
+  /* exports->Set(NanNew("privKeyImport"), NanNew<FunctionTemplate>(Privkey_Import)->GetFunction()); */
+  /* exports->Set(NanNew("privKeyTweakAdd"), NanNew<FunctionTemplate>(Privkey_Tweak_Add)->GetFunction()); */
+  /* exports->Set(NanNew("privKeyTweakMul"), NanNew<FunctionTemplate>(Privkey_Tweak_Mul)->GetFunction()); */
+  /* exports->Set(NanNew("pubKeyTweakAdd"), NanNew<FunctionTemplate>(Privkey_Tweak_Add)->GetFunction()); */
+  /* exports->Set(NanNew("pubKeyTweakMul"), NanNew<FunctionTemplate>(Privkey_Tweak_Mul)->GetFunction()); */
+}
+
+NODE_MODULE(secp256k1, Init)

Godeps/_workspace/src/github.com/ethereum/ethash/node-ethash/package.json

@@ -0,0 +1,13 @@
+{
+  "name": "node-ethash",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1",
+    "install": "node-gyp rebuild"
+  },
+  "author": "",
+  "license": "ISC",
+  "gypfile": true
+}

Godeps/_workspace/src/github.com/ethereum/ethash/node-ethash/readme.md

@@ -0,0 +1,12 @@
+# To Develop
+`npm install -g node-gyp`  
+`npm install .`  
+
+
+# To rebuild 
+`node-gyp rebuild`  
+
+
+# notes
+
+nan is good https://github.com/rvagg/nan

Godeps/_workspace/src/github.com/ethereum/ethash/test/CMakeLists.txt

@@ -0,0 +1,30 @@
+IF( NOT Boost_FOUND )
+    find_package(Boost COMPONENTS unit_test_framework)
+ENDIF()
+
+IF( Boost_FOUND )
+    include_directories( ${Boost_INCLUDE_DIR} )
+    include_directories(..)
+
+    link_directories ( ${Boost_LIBRARY_DIRS} )
+    file(GLOB HEADERS "*.h")
+    ADD_DEFINITIONS(-DBOOST_TEST_DYN_LINK)
+
+    if (NOT CRYPTOPP_FOUND)
+	    find_package (CryptoPP)
+    endif()
+
+    if (CRYPTOPP_FOUND)
+	    add_definitions(-DWITH_CRYPTOPP)
+    endif()
+
+    add_executable (Test test.cpp ${HEADERS})
+    target_link_libraries (Test ${Boost_UNIT_TEST_FRAMEWORK_LIBRARY} ${ETHHASH_LIBS})
+
+    if (CRYPTOPP_FOUND)
+	    TARGET_LINK_LIBRARIES(Test ${CRYPTOPP_LIBRARIES})
+    endif()
+
+    enable_testing ()
+    add_test(NAME ethash COMMAND Test)
+ENDIF()

Godeps/_workspace/src/github.com/ethereum/ethash/test/go/ethash_test.go

@@ -0,0 +1,54 @@
+package ethashTest
+
+import (
+	"bytes"
+	"crypto/rand"
+	"log"
+	"math/big"
+	"testing"
+
+	"github.com/ethereum/ethash"
+	"github.com/ethereum/go-ethereum/core"
+	"github.com/ethereum/go-ethereum/ethdb"
+)
+
+func TestEthash(t *testing.T) {
+	seedHash := make([]byte, 32)
+	_, err := rand.Read(seedHash)
+	if err != nil {
+		panic(err)
+	}
+
+	db, err := ethdb.NewMemDatabase()
+	if err != nil {
+		panic(err)
+	}
+
+	blockProcessor, err := core.NewCanonical(5, db)
+	if err != nil {
+		panic(err)
+	}
+
+	log.Println("Block Number: ", blockProcessor.ChainManager().CurrentBlock().Number())
+
+	e := ethash.New(blockProcessor.ChainManager())
+
+	miningHash := make([]byte, 32)
+	if _, err := rand.Read(miningHash); err != nil {
+		panic(err)
+	}
+	diff := big.NewInt(10000)
+	log.Println("difficulty", diff)
+
+	nonce := uint64(0)
+
+	ghash_full := e.FullHash(nonce, miningHash)
+	log.Printf("ethash full (on nonce): %x %x\n", ghash_full, nonce)
+
+	ghash_light := e.LightHash(nonce, miningHash)
+	log.Printf("ethash light (on nonce): %x %x\n", ghash_light, nonce)
+
+	if bytes.Compare(ghash_full, ghash_light) != 0 {
+		t.Errorf("full: %x, light: %x", ghash_full, ghash_light)
+	}
+}

Godeps/_workspace/src/github.com/ethereum/ethash/test/test.cpp

@@ -0,0 +1,233 @@
+#include <iomanip>
+#include <libethash/fnv.h>
+#include <libethash/ethash.h>
+#include <libethash/internal.h>
+
+#ifdef WITH_CRYPTOPP
+#include <libethash/sha3_cryptopp.h>
+#else
+#include <libethash/sha3.h>
+#endif // WITH_CRYPTOPP
+
+#define BOOST_TEST_MODULE Daggerhashimoto
+#define BOOST_TEST_MAIN
+
+#include <boost/test/unit_test.hpp>
+#include <libethash/ethash.h>
+#include <iostream>
+
+std::string bytesToHexString(const uint8_t *str, const size_t s) {
+    std::ostringstream ret;
+
+    for (int i = 0; i < s; ++i)
+        ret << std::hex << std::setfill('0') << std::setw(2) << std::nouppercase << (int) str[i];
+
+    return ret.str();
+}
+
+BOOST_AUTO_TEST_CASE(fnv_hash_check) {
+    uint32_t x = 1235U;
+    const uint32_t
+            y = 9999999U,
+            expected = (FNV_PRIME * x) ^ y;
+
+    x = fnv_hash(x, y);
+
+    BOOST_REQUIRE_MESSAGE(x == expected,
+            "\nexpected: " << expected << "\n"
+                    << "actual: " << x << "\n");
+
+}
+
+BOOST_AUTO_TEST_CASE(SHA256_check) {
+    uint8_t input[32], out[32];
+    memcpy(input, "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~", 32);
+    SHA3_256(out, input, 32);
+    const std::string
+            expected = "2b5ddf6f4d21c23de216f44d5e4bdc68e044b71897837ea74c83908be7037cd7",
+            actual = bytesToHexString(out, 32);
+    BOOST_REQUIRE_MESSAGE(expected == actual,
+            "\nexpected: " << expected.c_str() << "\n"
+                    << "actual: " << actual.c_str() << "\n");
+}
+
+BOOST_AUTO_TEST_CASE(SHA512_check) {
+    uint8_t input[64], out[64];
+    memcpy(input, "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~", 64);
+    SHA3_512(out, input, 64);
+    const std::string
+            expected = "0be8a1d334b4655fe58c6b38789f984bb13225684e86b20517a55ab2386c7b61c306f25e0627c60064cecd6d80cd67a82b3890bd1289b7ceb473aad56a359405",
+            actual = bytesToHexString(out, 64);
+    BOOST_REQUIRE_MESSAGE(expected == actual,
+            "\nexpected: " << expected.c_str() << "\n"
+                    << "actual: " << actual.c_str() << "\n");
+}
+
+BOOST_AUTO_TEST_CASE(ethash_params_init_genesis_check) {
+    ethash_params params;
+    ethash_params_init(&params, 0);
+    BOOST_REQUIRE_MESSAGE(params.full_size  < DAGSIZE_BYTES_INIT,
+            "\nfull size: " << params.full_size << "\n"
+                    << "should be less than or equal to: " << DAGSIZE_BYTES_INIT << "\n");
+    BOOST_REQUIRE_MESSAGE(params.full_size + 20*MIX_BYTES >= DAGSIZE_BYTES_INIT,
+            "\nfull size + 20*MIX_BYTES: " << params.full_size + 20*MIX_BYTES << "\n"
+                    << "should be greater than or equal to: " << DAGSIZE_BYTES_INIT << "\n");
+    BOOST_REQUIRE_MESSAGE(params.cache_size < DAGSIZE_BYTES_INIT / 32,
+            "\ncache size: " << params.cache_size << "\n"
+                    << "should be less than or equal to: " << DAGSIZE_BYTES_INIT / 32 << "\n");
+}
+
+BOOST_AUTO_TEST_CASE(ethash_params_init_genesis_calcifide_check) {
+    ethash_params params;
+    ethash_params_init(&params, 0);
+    const uint32_t expected_full_size = 1073739904;
+    const uint32_t expected_cache_size = 1048384;
+    BOOST_REQUIRE_MESSAGE(params.full_size  == expected_full_size,
+            "\nexpected: " << expected_cache_size << "\n"
+                    << "actual: " << params.full_size << "\n");
+    BOOST_REQUIRE_MESSAGE(params.cache_size  == expected_cache_size,
+            "\nexpected: " << expected_cache_size << "\n"
+                    << "actual: " << params.cache_size << "\n");
+}
+
+BOOST_AUTO_TEST_CASE(ethash_params_init_check) {
+    ethash_params params;
+    ethash_params_init(&params, 1971000);
+    const uint64_t nine_month_size = (uint64_t) 8*DAGSIZE_BYTES_INIT;
+    BOOST_REQUIRE_MESSAGE(params.full_size  < nine_month_size,
+            "\nfull size: " << params.full_size << "\n"
+                    << "should be less than or equal to: " << nine_month_size << "\n");
+    BOOST_REQUIRE_MESSAGE(params.full_size + DAGSIZE_BYTES_INIT / 4 > nine_month_size,
+            "\nfull size + DAGSIZE_BYTES_INIT / 4: " << params.full_size + DAGSIZE_BYTES_INIT / 4 << "\n"
+                    << "should be greater than or equal to: " << nine_month_size << "\n");
+    BOOST_REQUIRE_MESSAGE(params.cache_size < nine_month_size / 1024,
+            "\nactual cache size: " << params.cache_size << "\n"
+                    << "expected: " << nine_month_size / 1024 << "\n");
+    BOOST_REQUIRE_MESSAGE(params.cache_size + DAGSIZE_BYTES_INIT / 4 / 1024 > nine_month_size / 1024 ,
+            "\ncache size + DAGSIZE_BYTES_INIT / 4 / 1024: " << params.cache_size + DAGSIZE_BYTES_INIT / 4 / 1024 << "\n"
+                    << "actual: " << nine_month_size / 32 << "\n");
+}
+
+BOOST_AUTO_TEST_CASE(light_and_full_client_checks) {
+    ethash_params params;
+    uint8_t seed[32], hash[32];
+    ethash_return_value light_out, full_out;
+    memcpy(seed, "~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~", 32);
+    memcpy(hash, "~~~X~~~~~~~~~~~~~~~~~~~~~~~~~~~~", 32);
+    ethash_params_init(&params, 0);
+    params.cache_size = 1024;
+    params.full_size = 1024 * 32;
+    ethash_cache cache;
+    cache.mem = alloca(params.cache_size);
+    ethash_mkcache(&cache, &params, seed);
+    node * full_mem = (node *) alloca(params.full_size);
+    ethash_compute_full_data(full_mem, &params, &cache);
+
+    {
+        const std::string
+                expected = "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",
+                actual = bytesToHexString((uint8_t const *) cache.mem, params.cache_size);
+
+        BOOST_REQUIRE_MESSAGE(expected == actual,
+                "\nexpected: " << expected.c_str() << "\n"
+                        << "actual: " << actual.c_str() << "\n");
+    }
+
+
+
+    {
+        node node;
+        ethash_calculate_dag_item(&node, 0, &params, &cache);
+        const std::string
+                actual = bytesToHexString((uint8_t const *) &node, sizeof(node)),
+                expected = "b1698f829f90b35455804e5185d78f549fcb1bdce2bee006d4d7e68eb154b596be1427769eb1c3c3e93180c760af75f81d1023da6a0ffbe321c153a7c0103597";
+        BOOST_REQUIRE_MESSAGE(actual == expected,
+                "\n" << "expected: " << expected.c_str() << "\n"
+                        << "actual: " << actual.c_str() << "\n");
+    }
+
+    {
+        for (int i = 0 ; i < params.full_size / sizeof(node) ; ++i ) {
+            for (uint32_t j = 0; j < 32; ++j) {
+                node expected_node;
+                ethash_calculate_dag_item(&expected_node, j, &params, &cache);
+                const std::string
+                        actual = bytesToHexString((uint8_t const *) &(full_mem[j]), sizeof(node)),
+                        expected = bytesToHexString((uint8_t const *) &expected_node, sizeof(node));
+                BOOST_REQUIRE_MESSAGE(actual == expected,
+                        "\ni: " << j << "\n"
+                                << "expected: " << expected.c_str() << "\n"
+                                << "actual: " << actual.c_str() << "\n");
+            }
+        }
+    }
+
+    {
+        uint64_t nonce = 0x7c7c597c;
+        ethash_full(&full_out, full_mem, &params, hash, nonce);
+        ethash_light(&light_out, &cache, &params, hash, nonce);
+        const std::string
+                light_result_string = bytesToHexString(light_out.result, 32),
+                full_result_string = bytesToHexString(full_out.result, 32);
+        BOOST_REQUIRE_MESSAGE(light_result_string == full_result_string,
+                "\nlight result: " << light_result_string.c_str() << "\n"
+                        << "full result: " << full_result_string.c_str() << "\n");
+        const std::string
+                light_mix_hash_string = bytesToHexString(light_out.mix_hash, 32),
+                full_mix_hash_string = bytesToHexString(full_out.mix_hash, 32);
+        BOOST_REQUIRE_MESSAGE(full_mix_hash_string == light_mix_hash_string,
+                "\nlight mix hash: " << light_mix_hash_string.c_str() << "\n"
+                        << "full mix hash: " << full_mix_hash_string.c_str() << "\n");
+        uint8_t check_hash[32];
+        ethash_quick_hash(check_hash, hash, nonce, full_out.mix_hash);
+        const std::string check_hash_string = bytesToHexString(check_hash, 32);
+        BOOST_REQUIRE_MESSAGE(check_hash_string == full_result_string,
+                "\ncheck hash string: " << check_hash_string.c_str() << "\n"
+                        << "full result: " << full_result_string.c_str() << "\n");
+    }
+    {
+        ethash_full(&full_out, full_mem, &params, hash, 5);
+        std::string
+                light_result_string = bytesToHexString(light_out.result, 32),
+                full_result_string = bytesToHexString(full_out.result, 32);
+
+        BOOST_REQUIRE_MESSAGE(light_result_string != full_result_string,
+                "\nlight result and full result should differ: " << light_result_string.c_str() << "\n");
+
+        ethash_light(&light_out, &cache, &params, hash, 5);
+        light_result_string = bytesToHexString(light_out.result, 32);
+        BOOST_REQUIRE_MESSAGE(light_result_string == full_result_string,
+                "\nlight result and full result should be the same\n"
+                        << "light result: " << light_result_string.c_str() << "\n"
+                        << "full result: " << full_result_string.c_str() << "\n");
+        std::string
+                light_mix_hash_string = bytesToHexString(light_out.mix_hash, 32),
+                full_mix_hash_string = bytesToHexString(full_out.mix_hash, 32);
+        BOOST_REQUIRE_MESSAGE(full_mix_hash_string == light_mix_hash_string,
+                "\nlight mix hash: " << light_mix_hash_string.c_str() << "\n"
+                        << "full mix hash: " << full_mix_hash_string.c_str() << "\n");
+    }
+}
+
+BOOST_AUTO_TEST_CASE(ethash_check_difficulty_check) {
+    uint8_t hash[32], target[32];
+    memset(hash, 0, 32);
+    memset(target, 0, 32);
+
+    memcpy(hash, "11111111111111111111111111111111", 32);
+    memcpy(target, "22222222222222222222222222222222", 32);
+    BOOST_REQUIRE_MESSAGE(
+            ethash_check_difficulty(hash, target),
+            "\nexpected \"" << hash << "\" to have less difficulty than \"" << target << "\"\n");
+    BOOST_REQUIRE_MESSAGE(
+            !ethash_check_difficulty(hash, hash),
+            "\nexpected \"" << hash << "\" to have the same difficulty as \"" << hash << "\"\n");
+    memcpy(target, "11111111111111111111111111111112", 32);
+    BOOST_REQUIRE_MESSAGE(
+            ethash_check_difficulty(hash, target),
+            "\nexpected \"" << hash << "\" to have less difficulty than \"" << target << "\"\n");
+    memcpy(target, "11111111111111111111111111111110", 32);
+    BOOST_REQUIRE_MESSAGE(
+            !ethash_check_difficulty(hash, target),
+            "\nexpected \"" << hash << "\" to have more difficulty than \"" << target << "\"\n");
+}

blockpool/blockpool.go

@@ -0,0 +1,784 @@
+package blockpool
+
+import (
+	"bytes"
+	"fmt"
+	"math/big"
+	"sync"
+	"time"
+
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/errs"
+	ethlogger "github.com/ethereum/go-ethereum/logger"
+	"github.com/ethereum/go-ethereum/pow"
+)
+
+var plog = ethlogger.NewLogger("Blockpool")
+
+var (
+	// max number of block hashes sent in one request
+	blockHashesBatchSize = 256
+	// max number of blocks sent in one request
+	blockBatchSize = 64
+	// interval between two consecutive block checks (and requests)
+	blocksRequestInterval = 3 * time.Second
+	// level of redundancy in block requests sent
+	blocksRequestRepetition = 1
+	// interval between two consecutive block hash checks (and requests)
+	blockHashesRequestInterval = 3 * time.Second
+	// max number of idle iterations, ie., check through a section without new blocks coming in
+	blocksRequestMaxIdleRounds = 20
+	// timeout interval: max time allowed for peer without sending a block hash
+	blockHashesTimeout = 60 * time.Second
+	// timeout interval: max time allowed for peer without sending a block
+	blocksTimeout = 60 * time.Second
+	//
+	idleBestPeerTimeout = 60 * time.Second
+)
+
+// config embedded in components, by default fall back to constants
+// by default all resolved to local
+type Config struct {
+	BlockHashesBatchSize       int
+	BlockBatchSize             int
+	BlocksRequestRepetition    int
+	BlocksRequestMaxIdleRounds int
+	BlockHashesRequestInterval time.Duration
+	BlocksRequestInterval      time.Duration
+	BlockHashesTimeout         time.Duration
+	BlocksTimeout              time.Duration
+	IdleBestPeerTimeout        time.Duration
+}
+
+// blockpool errors
+const (
+	ErrInvalidBlock = iota
+	ErrInvalidPoW
+	ErrUnrequestedBlock
+	ErrInsufficientChainInfo
+	ErrIdleTooLong
+)
+
+var errorToString = map[int]string{
+	ErrInvalidBlock:          "Invalid block",
+	ErrInvalidPoW:            "Invalid PoW",
+	ErrUnrequestedBlock:      "Unrequested block",
+	ErrInsufficientChainInfo: "Insufficient chain info",
+	ErrIdleTooLong:           "Idle too long",
+}
+
+// init initialises all your laundry
+func (self *Config) init() {
+	if self.BlockHashesBatchSize == 0 {
+		self.BlockHashesBatchSize = blockHashesBatchSize
+	}
+	if self.BlockBatchSize == 0 {
+		self.BlockBatchSize = blockBatchSize
+	}
+	if self.BlocksRequestRepetition == 0 {
+		self.BlocksRequestRepetition = blocksRequestRepetition
+	}
+	if self.BlocksRequestMaxIdleRounds == 0 {
+		self.BlocksRequestMaxIdleRounds = blocksRequestMaxIdleRounds
+	}
+	if self.BlockHashesRequestInterval == 0 {
+		self.BlockHashesRequestInterval = blockHashesRequestInterval
+	}
+	if self.BlocksRequestInterval == 0 {
+		self.BlocksRequestInterval = blocksRequestInterval
+	}
+	if self.BlockHashesTimeout == 0 {
+		self.BlockHashesTimeout = blockHashesTimeout
+	}
+	if self.BlocksTimeout == 0 {
+		self.BlocksTimeout = blocksTimeout
+	}
+	if self.IdleBestPeerTimeout == 0 {
+		self.IdleBestPeerTimeout = idleBestPeerTimeout
+	}
+}
+
+// node is the basic unit of the internal model of block chain/tree in the blockpool
+type node struct {
+	lock    sync.RWMutex
+	hash    []byte
+	block   *types.Block
+	hashBy  string
+	blockBy string
+	td      *big.Int
+}
+
+type index struct {
+	int
+}
+
+// entry is the struct kept and indexed in the pool
+type entry struct {
+	node    *node
+	section *section
+	index   *index
+}
+
+type BlockPool struct {
+	Config *Config
+
+	// the minimal interface with blockchain
+	hasBlock    func(hash []byte) bool
+	insertChain func(types.Blocks) error
+	verifyPoW   func(pow.Block) bool
+
+	pool  map[string]*entry
+	peers *peers
+
+	lock      sync.RWMutex
+	chainLock sync.RWMutex
+	// alloc-easy pool of hash slices
+	hashSlicePool chan [][]byte
+
+	status *status
+
+	quit    chan bool
+	wg      sync.WaitGroup
+	running bool
+}
+
+// public constructor
+func New(
+	hasBlock func(hash []byte) bool,
+	insertChain func(types.Blocks) error,
+	verifyPoW func(pow.Block) bool,
+) *BlockPool {
+
+	return &BlockPool{
+		Config:      &Config{},
+		hasBlock:    hasBlock,
+		insertChain: insertChain,
+		verifyPoW:   verifyPoW,
+	}
+}
+
+func severity(code int) ethlogger.LogLevel {
+	switch code {
+	case ErrUnrequestedBlock:
+		return ethlogger.WarnLevel
+	default:
+		return ethlogger.ErrorLevel
+	}
+}
+
+// allows restart
+func (self *BlockPool) Start() {
+	self.lock.Lock()
+	defer self.lock.Unlock()
+
+	if self.running {
+		return
+	}
+
+	self.Config.init()
+	self.hashSlicePool = make(chan [][]byte, 150)
+	self.status = newStatus()
+	self.quit = make(chan bool)
+	self.pool = make(map[string]*entry)
+	self.running = true
+
+	self.peers = &peers{
+		errors: &errs.Errors{
+			Package: "Blockpool",
+			Errors:  errorToString,
+			Level:   severity,
+		},
+		peers:  make(map[string]*peer),
+		status: self.status,
+		bp:     self,
+	}
+	timer := time.NewTicker(3 * time.Second)
+	go func() {
+		for {
+			select {
+			case <-self.quit:
+				return
+			case <-timer.C:
+				plog.Debugf("status:\n%v", self.Status())
+			}
+		}
+	}()
+	plog.Infoln("Started")
+}
+
+func (self *BlockPool) Stop() {
+	self.lock.Lock()
+	if !self.running {
+		self.lock.Unlock()
+		return
+	}
+	self.running = false
+
+	self.lock.Unlock()
+
+	plog.Infoln("Stopping...")
+
+	close(self.quit)
+
+	self.lock.Lock()
+	self.peers = nil
+	self.pool = nil
+	self.lock.Unlock()
+
+	plog.Infoln("Stopped")
+}
+
+// Wait blocks until active processes finish
+func (self *BlockPool) Wait(t time.Duration) {
+	self.lock.Lock()
+	if !self.running {
+		self.lock.Unlock()
+		return
+	}
+	self.lock.Unlock()
+
+	plog.Infoln("Waiting for processes to complete...")
+	w := make(chan bool)
+	go func() {
+		self.wg.Wait()
+		close(w)
+	}()
+
+	select {
+	case <-w:
+		plog.Infoln("Processes complete")
+	case <-time.After(t):
+		plog.Warnf("Timeout")
+	}
+}
+
+/*
+AddPeer is called by the eth protocol instance running on the peer after
+the status message has been received with total difficulty and current block hash
+Called a second time with the same peer id, it is used to update chain info for a peer. This is used when a new (mined) block message is received.
+RemovePeer needs to be called when the peer disconnects.
+Peer info is currently not persisted across disconnects (or sessions)
+*/
+func (self *BlockPool) AddPeer(
+
+	td *big.Int, currentBlockHash []byte,
+	peerId string,
+	requestBlockHashes func([]byte) error,
+	requestBlocks func([][]byte) error,
+	peerError func(*errs.Error),
+
+) (best bool) {
+
+	return self.peers.addPeer(td, currentBlockHash, peerId, requestBlockHashes, requestBlocks, peerError)
+}
+
+// RemovePeer needs to be called when the peer disconnects
+func (self *BlockPool) RemovePeer(peerId string) {
+	self.peers.removePeer(peerId)
+}
+
+/*
+AddBlockHashes
+
+Entry point for eth protocol to add block hashes received via BlockHashesMsg
+
+only hashes from the best peer are handled
+
+initiates further hash requests until a known parent is reached (unless cancelled by a peerSwitch event, i.e., when a better peer becomes best peer)
+launches all block request processes on each chain section
+
+the first argument is an iterator function. Using this block hashes are decoded from the rlp message payload on demand. As a result, AddBlockHashes needs to run synchronously for one peer since the message is discarded if the caller thread returns.
+*/
+func (self *BlockPool) AddBlockHashes(next func() ([]byte, bool), peerId string) {
+
+	bestpeer, best := self.peers.getPeer(peerId)
+	if !best {
+		return
+	}
+	// bestpeer is still the best peer
+
+	self.wg.Add(1)
+
+	defer func() { self.wg.Done() }()
+
+	self.status.lock.Lock()
+	self.status.activePeers[bestpeer.id]++
+	self.status.lock.Unlock()
+
+	var n int
+	var hash []byte
+	var ok, headSection, peerswitch bool
+	var sec, child, parent *section
+	var entry *entry
+	var nodes []*node
+
+	hash, ok = next()
+	bestpeer.lock.Lock()
+
+	plog.Debugf("AddBlockHashes: peer <%s> starting from [%s] (peer head: %s)", peerId, hex(bestpeer.parentHash), hex(bestpeer.currentBlockHash))
+
+	// first check if we are building the head section of a peer's chain
+	if bytes.Equal(bestpeer.parentHash, hash) {
+		if self.hasBlock(bestpeer.currentBlockHash) {
+			return
+		}
+		/*
+		 when peer is promoted in switchPeer, a new header section process is launched
+		 as the head section skeleton is actually created here, it is signaled to the process
+		 so that it can quit
+		 in the special case that the node for parent of the head block is found in the blockpool
+		 (with or without fetched block)
+		*/
+		headSection = true
+		if entry := self.get(bestpeer.currentBlockHash); entry == nil {
+			plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s) head section starting from [%s] ", peerId, hex(bestpeer.currentBlockHash), hex(bestpeer.parentHash))
+			// if head block is not yet in the pool, create entry and start node list for section
+			node := &node{
+				hash:    bestpeer.currentBlockHash,
+				block:   bestpeer.currentBlock,
+				hashBy:  peerId,
+				blockBy: peerId,
+			}
+			// nodes is a list of nodes in one section ordered top-bottom (old to young)
+			nodes = append(nodes, node)
+			n++
+		} else {
+			// otherwise set child section iff found node is the root of a section
+			// this is a possible scenario when a singleton head section was created
+			// on an earlier occasion this peer or another with the same block was best peer
+			if entry.node == entry.section.bottom {
+				child = entry.section
+				plog.DebugDetailf("AddBlockHashes: peer <%s>: connects to child section root %s", peerId, hex(bestpeer.currentBlockHash))
+			}
+		}
+	} else {
+		// otherwise : we are not building the head section of the peer
+		plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s) section starting from [%s] ", peerId, hex(bestpeer.currentBlockHash), hex(hash))
+	}
+	// the switch channel signals peerswitch event
+	switchC := bestpeer.switchC
+	bestpeer.lock.Unlock()
+
+	// iterate over hashes coming from peer (first round we have hash set above)
+LOOP:
+	for ; ok; hash, ok = next() {
+
+		select {
+		case <-self.quit:
+			// global quit for blockpool
+			return
+
+		case <-switchC:
+			// if the peer is demoted, no more hashes read
+			plog.DebugDetailf("AddBlockHashes: demoted peer <%s> (head: %s)", peerId, hex(bestpeer.currentBlockHash), hex(hash))
+			peerswitch = true
+			break LOOP
+		default:
+		}
+
+		// if we reach the blockchain we stop reading more
+		if self.hasBlock(hash) {
+			// check if known block connecting the downloaded chain to our blockchain
+			plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s) found block %s in the blockchain", peerId, hex(bestpeer.currentBlockHash), hex(hash))
+			if len(nodes) == 1 {
+				plog.DebugDetailf("AddBlockHashes: singleton section pushed to blockchain peer <%s> (head: %s) found block %s in the blockchain", peerId, hex(bestpeer.currentBlockHash), hex(hash))
+
+				// create new section if needed and push it to the blockchain
+				sec = self.newSection(nodes)
+				sec.addSectionToBlockChain(bestpeer)
+			} else {
+
+				/*
+					 not added hash yet but according to peer child section built
+					earlier chain connects with blockchain
+					this maybe a potential vulnarability
+					the root block arrives (or already there but its parenthash was not pointing to known block in the blockchain)
+					we start inserting -> error -> remove the entire chain
+					instead of punishing this peer
+					solution: when switching peers always make sure best peers own head block
+					and td together with blockBy are recorded on the node
+				*/
+				if len(nodes) == 0 && child != nil {
+					plog.DebugDetailf("AddBlockHashes: child section [%s] pushed to blockchain peer <%s> (head: %s) found block %s in the blockchain", sectionhex(child), peerId, hex(bestpeer.currentBlockHash), hex(hash))
+
+					child.addSectionToBlockChain(bestpeer)
+				}
+			}
+			break LOOP
+		}
+
+		// look up node in the pool
+		entry = self.get(hash)
+		if entry != nil {
+			// reached a known chain in the pool
+			if entry.node == entry.section.bottom && n == 1 {
+				/*
+					the first block hash received is an orphan in the pool
+					this also supports clients that (despite the spec) include <from> hash in their
+					response to hashes request. Note that by providing <from> we can link sections
+					without having to wait for the root block of the child section to arrive, so it allows for superior performance
+				*/
+				plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s) found head block [%s] as root of connecting child section [%s] skipping", peerId, hex(bestpeer.currentBlockHash), hex(hash), sectionhex(entry.section))
+				// record the entry's chain section as child section
+				child = entry.section
+				continue LOOP
+			}
+			// otherwise record entry's chain section as parent connecting it to the pool
+			plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s) found block [%s] in section [%s]. Connected to pool.", peerId, hex(bestpeer.currentBlockHash), hex(hash), sectionhex(entry.section))
+			parent = entry.section
+			break LOOP
+		}
+
+		// finally if node for block hash does not exist, create it and append node to section nodes
+		node := &node{
+			hash:   hash,
+			hashBy: peerId,
+		}
+		nodes = append(nodes, node)
+	} //for
+
+	/*
+		we got here if
+		- run out of hashes (parent = nil) sent by our best peer
+		- our peer is demoted (peerswitch = true)
+		- reached blockchain or blockpool
+		- quitting
+	*/
+	self.chainLock.Lock()
+
+	plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s): %v nodes in new section", peerId, hex(bestpeer.currentBlockHash), len(nodes))
+	/*
+	  handle forks where connecting node is mid-section
+	  by splitting section at fork
+	  no splitting needed if connecting node is head of a section
+	*/
+	if parent != nil && entry != nil && entry.node != parent.top && len(nodes) > 0 {
+		plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s): fork after %s", peerId, hex(bestpeer.currentBlockHash), hex(hash))
+
+		self.splitSection(parent, entry)
+
+		self.status.lock.Lock()
+		self.status.values.Forks++
+		self.status.lock.Unlock()
+	}
+
+	/*
+	  if new section is created, link it to parent/child sections
+	  and launch section process fetching blocks and further hashes
+	*/
+	sec = self.linkSections(nodes, parent, child)
+
+	if sec != nil {
+		self.status.lock.Lock()
+		self.status.values.BlockHashes += len(nodes)
+		self.status.lock.Unlock()
+		plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s): section [%s] created", peerId, hex(bestpeer.currentBlockHash), sectionhex(sec))
+	}
+
+	self.chainLock.Unlock()
+
+	/*
+		if a blockpool node is reached (parent section is not nil),
+		activate section (unless our peer is demoted by now).
+		this can be the bottom half of a newly split section in case of a fork.
+		bestPeer is nil if we got here after our peer got demoted while processing.
+		in this case no activation should happen
+	*/
+	if parent != nil && !peerswitch {
+		self.activateChain(parent, bestpeer, nil)
+		plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s): parent section [%s]", peerId, hex(bestpeer.currentBlockHash), sectionhex(parent))
+	}
+
+	/*
+	  if a new section was created,
+	  register section iff head section or no child known
+	  activate it with this peer
+	*/
+	if sec != nil {
+		// switch on section process (it is paused by switchC)
+		if !peerswitch {
+			if headSection || child == nil {
+				bestpeer.lock.Lock()
+				bestpeer.sections = append(bestpeer.sections, sec.top.hash)
+				bestpeer.lock.Unlock()
+			}
+			/*
+			  request next block hashes for parent section here.
+			  but only once, repeating only when bottom block arrives,
+			  otherwise no way to check if it arrived
+			*/
+			bestpeer.requestBlockHashes(sec.bottom.hash)
+			plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s): start requesting blocks for section [%s]", peerId, hex(bestpeer.currentBlockHash), sectionhex(sec))
+			sec.activate(bestpeer)
+		} else {
+			plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s) no longer best: delay requesting blocks for section [%s]", peerId, hex(bestpeer.currentBlockHash), sectionhex(sec))
+			sec.deactivate()
+		}
+	}
+
+	// if we are processing peer's head section, signal it to headSection process that it is created
+
+	if headSection {
+		plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s) head section registered on head section process", peerId, hex(bestpeer.currentBlockHash))
+
+		var headSec *section
+		switch {
+		case sec != nil:
+			headSec = sec
+		case child != nil:
+			headSec = child
+		default:
+			headSec = parent
+		}
+		if !peerswitch {
+			plog.DebugDetailf("AddBlockHashes: peer <%s> (head: %s) head section [%s] created signalled to head section process", peerId, hex(bestpeer.currentBlockHash), sectionhex(headSec))
+			bestpeer.headSectionC <- headSec
+		}
+	}
+}
+
+/*
+	AddBlock is the entry point for the eth protocol to call when blockMsg is received.
+
+	It has a strict interpretation of the protocol in that if the block received has not been requested, it results in an error
+
+	At the same time it is opportunistic in that if a requested block may be provided by any peer.
+
+	The received block is checked for PoW. Only the first PoW-valid block for a hash is considered legit.
+*/
+func (self *BlockPool) AddBlock(block *types.Block, peerId string) {
+	hash := block.Hash()
+
+	sender, _ := self.peers.getPeer(peerId)
+	if sender == nil {
+		return
+	}
+
+	self.status.lock.Lock()
+	self.status.activePeers[peerId]++
+	self.status.lock.Unlock()
+
+	entry := self.get(hash)
+
+	// a peer's current head block is appearing the first time
+	if bytes.Equal(hash, sender.currentBlockHash) {
+		if sender.currentBlock == nil {
+			plog.Debugf("AddBlock: add head block %s for peer <%s> (head: %s)", hex(hash), peerId, hex(sender.currentBlockHash))
+			sender.setChainInfoFromBlock(block)
+			// sender.currentBlockC <- block
+
+			self.status.lock.Lock()
+			self.status.values.Blocks++
+			self.status.values.BlocksInPool++
+			self.status.lock.Unlock()
+		} else {
+			plog.DebugDetailf("AddBlock: head block %s for peer <%s> (head: %s) already known", hex(hash), peerId, hex(sender.currentBlockHash))
+			sender.currentBlockC <- block
+		}
+	} else {
+
+		plog.DebugDetailf("AddBlock: block %s received from peer <%s> (head: %s)", hex(hash), peerId, hex(sender.currentBlockHash))
+
+		sender.lock.Lock()
+		// update peer chain info if more recent than what we registered
+		if block.Td != nil && block.Td.Cmp(sender.td) > 0 {
+			sender.td = block.Td
+			sender.currentBlockHash = block.Hash()
+			sender.parentHash = block.ParentHash()
+			sender.currentBlock = block
+			sender.headSection = nil
+		}
+		sender.lock.Unlock()
+
+		if entry == nil {
+			// penalise peer for sending what we have not asked
+			plog.DebugDetailf("AddBlock: unrequested block %s received from peer <%s> (head: %s)", hex(hash), peerId, hex(sender.currentBlockHash))
+			sender.addError(ErrUnrequestedBlock, "%x", hash)
+
+			self.status.lock.Lock()
+			self.status.badPeers[peerId]++
+			self.status.lock.Unlock()
+			return
+		}
+	}
+	if entry == nil {
+		return
+	}
+
+	node := entry.node
+	node.lock.Lock()
+	defer node.lock.Unlock()
+
+	// check if block already present
+	if node.block != nil {
+		plog.DebugDetailf("AddBlock: block %s from peer <%s> (head: %s) already sent by <%s> ", hex(hash), peerId, hex(sender.currentBlockHash), node.blockBy)
+		return
+	}
+
+	// check if block is already inserted in the blockchain
+	if self.hasBlock(hash) {
+		plog.DebugDetailf("AddBlock: block %s from peer <%s> (head: %s) already in the blockchain", hex(hash), peerId, hex(sender.currentBlockHash))
+		return
+	}
+
+	// validate block for PoW
+	if !self.verifyPoW(block) {
+		plog.Warnf("AddBlock: invalid PoW on block %s from peer  <%s> (head: %s)", hex(hash), peerId, hex(sender.currentBlockHash))
+		sender.addError(ErrInvalidPoW, "%x", hash)
+
+		self.status.lock.Lock()
+		self.status.badPeers[peerId]++
+		self.status.lock.Unlock()
+
+		return
+	}
+
+	node.block = block
+	node.blockBy = peerId
+	node.td = block.Td // optional field
+
+	self.status.lock.Lock()
+	self.status.values.Blocks++
+	self.status.values.BlocksInPool++
+	self.status.lock.Unlock()
+
+}
+
+/*
+  iterates down a chain section by section
+  activating section process on incomplete sections with peer
+  relinking orphaned sections with their parent if root block (and its parent hash) is known)
+*/
+func (self *BlockPool) activateChain(sec *section, p *peer, connected map[string]*section) {
+
+	p.lock.RLock()
+	switchC := p.switchC
+	p.lock.RUnlock()
+
+	var i int
+
+LOOP:
+	for sec != nil {
+		parent := self.getParent(sec)
+		plog.DebugDetailf("activateChain: section [%s] activated by peer <%s>", sectionhex(sec), p.id)
+		sec.activate(p)
+		if i > 0 && connected != nil {
+			connected[string(sec.top.hash)] = sec
+		}
+		/*
+		  we need to relink both complete and incomplete sections
+		  the latter could have been blockHashesRequestsComplete before being delinked from its parent
+		*/
+		if parent == nil {
+			if sec.bottom.block != nil {
+				if entry := self.get(sec.bottom.block.ParentHash()); entry != nil {
+					parent = entry.section
+					plog.DebugDetailf("activateChain: [%s]-[%s] link", sectionhex(parent), sectionhex(sec))
+					link(parent, sec)
+				}
+			} else {
+				plog.DebugDetailf("activateChain: section [%s] activated by peer <%s> has missing root block", sectionhex(sec), p.id)
+			}
+		}
+		sec = parent
+
+		// stop if peer got demoted
+		select {
+		case <-switchC:
+			break LOOP
+		case <-self.quit:
+			break LOOP
+		default:
+		}
+	}
+}
+
+// must run in separate go routine, otherwise
+// switchpeer -> activateChain -> activate deadlocks on section process select and peers.lock
+func (self *BlockPool) requestBlocks(attempts int, hashes [][]byte) {
+	self.wg.Add(1)
+	go func() {
+		self.peers.requestBlocks(attempts, hashes)
+		self.wg.Done()
+	}()
+}
+
+// convenience methods to access adjacent sections
+func (self *BlockPool) getParent(sec *section) *section {
+	self.chainLock.RLock()
+	defer self.chainLock.RUnlock()
+	return sec.parent
+}
+
+func (self *BlockPool) getChild(sec *section) *section {
+	self.chainLock.RLock()
+	defer self.chainLock.RUnlock()
+	return sec.child
+}
+
+// accessor and setter for entries in the pool
+func (self *BlockPool) get(hash []byte) *entry {
+	self.lock.RLock()
+	defer self.lock.RUnlock()
+	return self.pool[string(hash)]
+}
+
+func (self *BlockPool) set(hash []byte, e *entry) {
+	self.lock.Lock()
+	defer self.lock.Unlock()
+	self.pool[string(hash)] = e
+}
+
+func (self *BlockPool) remove(sec *section) {
+	// delete node entries from pool index under pool lock
+	self.lock.Lock()
+	defer self.lock.Unlock()
+
+	for _, node := range sec.nodes {
+		delete(self.pool, string(node.hash))
+	}
+	if sec.initialised && sec.poolRootIndex != 0 {
+		self.status.lock.Lock()
+		self.status.values.BlocksInPool -= len(sec.nodes) - sec.missing
+		self.status.lock.Unlock()
+	}
+}
+
+func (self *BlockPool) getHashSlice() (s [][]byte) {
+	select {
+	case s = <-self.hashSlicePool:
+	default:
+		s = make([][]byte, self.Config.BlockBatchSize)
+	}
+	return
+}
+
+// Return returns a Client to the pool.
+func (self *BlockPool) putHashSlice(s [][]byte) {
+	if len(s) == self.Config.BlockBatchSize {
+		select {
+		case self.hashSlicePool <- s:
+		default:
+		}
+	}
+}
+
+// pretty prints hash (byte array) with first 4 bytes in hex
+func hex(hash []byte) (name string) {
+	if hash == nil {
+		name = ""
+	} else {
+		name = fmt.Sprintf("%x", hash[:4])
+	}
+	return
+}
+
+// pretty prints a section using first 4 bytes in hex of bottom and top blockhash of the section
+func sectionhex(section *section) (name string) {
+	if section == nil {
+		name = ""
+	} else {
+		name = fmt.Sprintf("%x-%x", section.bottom.hash[:4], section.top.hash[:4])
+	}
+	return
+}

blockpool/blockpool_test.go

@@ -0,0 +1,479 @@
+package blockpool
+
+import (
+	"testing"
+	"time"
+
+	"github.com/ethereum/go-ethereum/blockpool/test"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/ethutil"
+)
+
+func TestPeerWithKnownBlock(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	blockPoolTester.refBlockChain[0] = nil
+	blockPoolTester.blockChain[0] = nil
+	blockPool.Start()
+
+	peer0 := blockPoolTester.newPeer("0", 1, 0)
+	peer0.AddPeer()
+
+	blockPool.Wait(waitTimeout)
+	blockPool.Stop()
+	// no request on known block
+	peer0.checkBlockHashesRequests()
+}
+
+func TestPeerWithKnownParentBlock(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	blockPoolTester.initRefBlockChain(1)
+	blockPoolTester.blockChain[0] = nil
+	blockPool.Start()
+
+	peer0 := blockPoolTester.newPeer("0", 1, 1)
+	peer0.AddPeer()
+	peer0.serveBlocks(0, 1)
+
+	blockPool.Wait(waitTimeout)
+	blockPool.Stop()
+	peer0.checkBlocksRequests([]int{1})
+	peer0.checkBlockHashesRequests()
+	blockPoolTester.refBlockChain[1] = []int{}
+	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
+}
+
+func TestPeerPromotionByOptionalTdOnBlock(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	blockPoolTester.blockChain[0] = nil
+	blockPoolTester.initRefBlockChain(4)
+	peer0 := blockPoolTester.newPeer("peer0", 2, 2)
+	peer1 := blockPoolTester.newPeer("peer1", 1, 1)
+	peer2 := blockPoolTester.newPeer("peer2", 3, 4)
+
+	blockPool.Start()
+
+	// pool
+	peer0.AddPeer()
+	peer0.serveBlocks(1, 2)
+	best := peer1.AddPeer()
+	// this tests that peer1 is not promoted over peer0 yet
+	if best {
+		t.Errorf("peer1 (TD=1) should not be set as best")
+	}
+	best = peer2.AddPeer()
+	peer2.serveBlocks(3, 4)
+	peer2.serveBlockHashes(4, 3, 2, 1)
+	hashes := blockPoolTester.hashPool.IndexesToHashes([]int{2, 3})
+	peer1.waitBlocksRequests(3)
+	blockPool.AddBlock(&types.Block{
+		HeaderHash:       ethutil.Bytes(hashes[1]),
+		ParentHeaderHash: ethutil.Bytes(hashes[0]),
+		Td:               ethutil.Big3,
+	}, "peer1")
+
+	blockPool.RemovePeer("peer2")
+	if blockPool.peers.best.id != "peer1" {
+		t.Errorf("peer1 (TD=3) should be set as best")
+	}
+	peer1.serveBlocks(0, 1, 2)
+
+	blockPool.Wait(waitTimeout)
+	blockPool.Stop()
+	blockPoolTester.refBlockChain[4] = []int{}
+	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
+}
+
+func TestSimpleChain(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	blockPoolTester.blockChain[0] = nil
+	blockPoolTester.initRefBlockChain(2)
+
+	blockPool.Start()
+
+	peer1 := blockPoolTester.newPeer("peer1", 1, 2)
+	peer1.AddPeer()
+	peer1.serveBlocks(1, 2)
+	go peer1.serveBlockHashes(2, 1, 0)
+	peer1.serveBlocks(0, 1)
+
+	blockPool.Wait(waitTimeout)
+	blockPool.Stop()
+	blockPoolTester.refBlockChain[2] = []int{}
+	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
+}
+
+func TestChainConnectingWithParentHash(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	blockPoolTester.blockChain[0] = nil
+	blockPoolTester.initRefBlockChain(3)
+
+	blockPool.Start()
+
+	peer1 := blockPoolTester.newPeer("peer1", 1, 3)
+	peer1.AddPeer()
+	go peer1.serveBlocks(2, 3)
+	go peer1.serveBlockHashes(3, 2, 1)
+	peer1.serveBlocks(0, 1, 2)
+
+	blockPool.Wait(waitTimeout)
+	blockPool.Stop()
+	blockPoolTester.refBlockChain[3] = []int{}
+	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
+}
+
+func TestMultiSectionChain(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	blockPoolTester.blockChain[0] = nil
+	blockPoolTester.initRefBlockChain(5)
+
+	blockPool.Start()
+
+	peer1 := blockPoolTester.newPeer("peer1", 1, 5)
+
+	peer1.AddPeer()
+	go peer1.serveBlocks(4, 5)
+	go peer1.serveBlockHashes(5, 4, 3)
+	go peer1.serveBlocks(2, 3, 4)
+	go peer1.serveBlockHashes(3, 2, 1, 0)
+	peer1.serveBlocks(0, 1, 2)
+
+	blockPool.Wait(waitTimeout)
+	blockPool.Stop()
+	blockPoolTester.refBlockChain[5] = []int{}
+	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
+}
+
+func TestNewBlocksOnPartialChain(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	blockPoolTester.blockChain[0] = nil
+	blockPoolTester.initRefBlockChain(7)
+	blockPool.Start()
+
+	peer1 := blockPoolTester.newPeer("peer1", 1, 5)
+
+	peer1.AddPeer()
+	go peer1.serveBlocks(4, 5) // partially complete section
+	go peer1.serveBlockHashes(5, 4, 3)
+	peer1.serveBlocks(3, 4) // partially complete section
+	// peer1 found new blocks
+	peer1.td = 2
+	peer1.currentBlock = 7
+	peer1.AddPeer()
+	peer1.sendBlocks(6, 7)
+	go peer1.serveBlockHashes(7, 6, 5)
+	go peer1.serveBlocks(2, 3)
+	go peer1.serveBlocks(5, 6)
+	go peer1.serveBlockHashes(3, 2, 1) // tests that hash request from known chain root is remembered
+	peer1.serveBlocks(0, 1, 2)
+	// blockPool.RemovePeer("peer1")
+
+	blockPool.Wait(waitTimeout)
+	blockPool.Stop()
+	blockPoolTester.refBlockChain[7] = []int{}
+	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
+}
+
+func TestPeerSwitchUp(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	blockPoolTester.blockChain[0] = nil
+	blockPoolTester.initRefBlockChain(7)
+
+	blockPool.Start()
+
+	peer1 := blockPoolTester.newPeer("peer1", 1, 6)
+	peer2 := blockPoolTester.newPeer("peer2", 2, 7)
+
+	peer1.AddPeer()
+	go peer1.serveBlocks(5, 6)
+	go peer1.serveBlockHashes(6, 5, 4, 3) //
+	peer1.serveBlocks(2, 3)               // section partially complete, block 3 will be preserved after peer demoted
+	peer2.AddPeer()                       // peer2 is promoted as best peer, peer1 is demoted
+	go peer2.serveBlocks(6, 7)
+	// go peer2.serveBlockHashes(7, 6)       //
+	go peer2.serveBlocks(4, 5)            // tests that block request for earlier section is remembered
+	go peer1.serveBlocks(3, 4)            // tests that connecting section by demoted peer is remembered and blocks are accepted from demoted peer
+	go peer2.serveBlockHashes(3, 2, 1, 0) // tests that known chain section is activated, hash requests from 3 is remembered
+	peer2.serveBlocks(0, 1, 2)            // final blocks linking to blockchain sent
+
+	blockPool.Wait(waitTimeout)
+	blockPool.Stop()
+	blockPoolTester.refBlockChain[7] = []int{}
+	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
+}
+
+func TestPeerSwitchDownOverlapSectionWithoutRootBlock(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	blockPoolTester.blockChain[0] = nil
+	blockPoolTester.initRefBlockChain(6)
+	blockPool.Start()
+
+	peer1 := blockPoolTester.newPeer("peer1", 1, 4)
+	peer2 := blockPoolTester.newPeer("peer2", 2, 6)
+
+	peer2.AddPeer()
+	peer2.serveBlocks(5, 6)                  // partially complete, section will be preserved
+	peer2.serveBlockHashes(6, 5, 4)          // no go: make sure skeleton is created
+	peer1.AddPeer()                          // inferior peer1 is promoted as best peer
+	blockPool.RemovePeer("peer2")            // peer2 disconnects
+	go peer1.serveBlockHashes(4, 3, 2, 1, 0) //
+	go peer1.serveBlocks(3, 4)               //
+	go peer1.serveBlocks(4, 5)               // tests that section set by demoted peer is remembered and blocks are accepted from new peer if they have it even if peers original TD is lower
+	peer1.serveBlocks(0, 1, 2, 3)
+
+	blockPool.Wait(waitTimeout)
+	blockPool.Stop()
+	blockPoolTester.refBlockChain[6] = []int{} // tests that idle sections are not inserted in blockchain
+	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
+}
+
+func TestPeerSwitchDownOverlapSectionWithRootBlock(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	blockPoolTester.blockChain[0] = nil
+	blockPoolTester.initRefBlockChain(6)
+	blockPool.Start()
+
+	peer1 := blockPoolTester.newPeer("peer1", 1, 4)
+	peer2 := blockPoolTester.newPeer("peer2", 2, 6)
+
+	peer2.AddPeer()
+	peer2.serveBlocks(5, 6)                  // partially complete, section will be preserved
+	go peer2.serveBlockHashes(6, 5, 4)       //
+	peer2.serveBlocks(3, 4)                  // !incomplete section
+	time.Sleep(100 * time.Millisecond)       // make sure block 4 added
+	peer1.AddPeer()                          // inferior peer1 is promoted as best peer
+	blockPool.RemovePeer("peer2")            // peer2 disconnects
+	go peer1.serveBlockHashes(4, 3, 2, 1, 0) // tests that hash request are directly connecting if the head block exists
+	go peer1.serveBlocks(4, 5)               // tests that section set by demoted peer is remembered and blocks are accepted from new peer if they have it even if peers original TD is lower
+	peer1.serveBlocks(0, 1, 2, 3)
+
+	blockPool.Wait(waitTimeout)
+	blockPool.Stop()
+	blockPoolTester.refBlockChain[6] = []int{} // tests that idle sections are not inserted in blockchain
+	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
+}
+
+func TestPeerSwitchDownDisjointSection(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	blockPoolTester.blockChain[0] = nil
+	blockPoolTester.initRefBlockChain(3)
+	blockPool.Start()
+
+	peer1 := blockPoolTester.newPeer("peer1", 1, 3)
+	peer2 := blockPoolTester.newPeer("peer2", 2, 6)
+
+	peer2.AddPeer()
+	peer2.serveBlocks(5, 6)            // partially complete, section will be preserved
+	go peer2.serveBlockHashes(6, 5, 4) //
+	peer2.serveBlocks(3, 4, 5)         //
+	time.Sleep(100 * time.Millisecond) // make sure blocks are received
+	peer1.AddPeer()                    // inferior peer1 is promoted as best peer
+	blockPool.RemovePeer("peer2")      // peer2 disconnects
+	go peer1.serveBlocks(2, 3)         //
+	go peer1.serveBlockHashes(3, 2, 1) //
+	peer1.serveBlocks(0, 1, 2)         //
+
+	blockPool.Wait(waitTimeout)
+	blockPool.Stop()
+	blockPoolTester.refBlockChain[3] = []int{} // tests that idle sections are not inserted in blockchain
+	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
+}
+
+func TestPeerSwitchBack(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	blockPoolTester.blockChain[0] = nil
+	blockPoolTester.initRefBlockChain(8)
+
+	blockPool.Start()
+
+	peer1 := blockPoolTester.newPeer("peer1", 2, 11)
+	peer2 := blockPoolTester.newPeer("peer2", 1, 8)
+
+	peer2.AddPeer()
+	go peer2.serveBlocks(7, 8)
+	go peer2.serveBlockHashes(8, 7, 6)
+	go peer2.serveBlockHashes(6, 5, 4)
+	peer2.serveBlocks(4, 5)                  // section partially complete
+	peer1.AddPeer()                          // peer1 is promoted as best peer
+	go peer1.serveBlocks(10, 11)             //
+	peer1.serveBlockHashes(11, 10)           // only gives useless results
+	blockPool.RemovePeer("peer1")            // peer1 disconnects
+	go peer2.serveBlockHashes(4, 3, 2, 1, 0) // tests that asking for hashes from 4 is remembered
+	go peer2.serveBlocks(3, 4, 5, 6, 7, 8)   // tests that section 4, 5, 6 and 7, 8 are remembered for missing blocks
+	peer2.serveBlocks(0, 1, 2, 3)
+
+	blockPool.Wait(waitTimeout)
+	blockPool.Stop()
+	blockPoolTester.refBlockChain[8] = []int{}
+	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
+}
+
+func TestForkSimple(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	blockPoolTester.blockChain[0] = nil
+	blockPoolTester.initRefBlockChain(9)
+	blockPoolTester.refBlockChain[3] = []int{4, 7}
+	delete(blockPoolTester.refBlockChain, 6)
+
+	blockPool.Start()
+
+	peer1 := blockPoolTester.newPeer("peer1", 1, 9)
+	peer2 := blockPoolTester.newPeer("peer2", 2, 6)
+
+	peer1.AddPeer()
+	go peer1.serveBlocks(8, 9)
+	go peer1.serveBlockHashes(9, 8, 7, 3, 2)
+	peer1.serveBlocks(1, 2, 3, 7, 8)
+	peer2.AddPeer()                          // peer2 is promoted as best peer
+	go peer2.serveBlocks(5, 6)               //
+	go peer2.serveBlockHashes(6, 5, 4, 3, 2) // fork on 3 -> 4 (earlier child: 7)
+	go peer2.serveBlocks(1, 2, 3, 4, 5)
+	go peer2.serveBlockHashes(2, 1, 0)
+	peer2.serveBlocks(0, 1, 2)
+
+	blockPool.Wait(waitTimeout)
+	blockPool.Stop()
+	blockPoolTester.refBlockChain[6] = []int{}
+	blockPoolTester.refBlockChain[3] = []int{4}
+	delete(blockPoolTester.refBlockChain, 7)
+	delete(blockPoolTester.refBlockChain, 8)
+	delete(blockPoolTester.refBlockChain, 9)
+	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
+
+}
+
+func TestForkSwitchBackByNewBlocks(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	blockPoolTester.blockChain[0] = nil
+	blockPoolTester.initRefBlockChain(11)
+	blockPoolTester.refBlockChain[3] = []int{4, 7}
+	delete(blockPoolTester.refBlockChain, 6)
+
+	blockPool.Start()
+
+	peer1 := blockPoolTester.newPeer("peer1", 1, 9)
+	peer2 := blockPoolTester.newPeer("peer2", 2, 6)
+
+	peer1.AddPeer()
+	go peer1.serveBlocks(8, 9)               //
+	go peer1.serveBlockHashes(9, 8, 7, 3, 2) //
+	peer1.serveBlocks(7, 8)                  // partial section
+	// time.Sleep(1 * time.Second)
+	peer2.AddPeer()                          //
+	go peer2.serveBlocks(5, 6)               //
+	go peer2.serveBlockHashes(6, 5, 4, 3, 2) // peer2 forks on block 3
+	peer2.serveBlocks(1, 2, 3, 4, 5)         //
+
+	// peer1 finds new blocks
+	peer1.td = 3
+	peer1.currentBlock = 11
+	peer1.AddPeer()
+	go peer1.serveBlocks(10, 11)
+	go peer1.serveBlockHashes(11, 10, 9)
+	go peer1.serveBlocks(9, 10)
+	// time.Sleep(1 * time.Second)
+	go peer1.serveBlocks(3, 7)      // tests that block requests on earlier fork are remembered
+	go peer1.serveBlockHashes(2, 1) // tests that hash request from root of connecting chain section (added by demoted peer) is remembered
+	peer1.serveBlocks(0, 1)
+
+	blockPool.Wait(waitTimeout)
+	blockPool.Stop()
+	blockPoolTester.refBlockChain[11] = []int{}
+	blockPoolTester.refBlockChain[3] = []int{7}
+	delete(blockPoolTester.refBlockChain, 6)
+	delete(blockPoolTester.refBlockChain, 5)
+	delete(blockPoolTester.refBlockChain, 4)
+	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
+
+}
+
+func TestForkSwitchBackByPeerSwitchBack(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	blockPoolTester.blockChain[0] = nil
+	blockPoolTester.initRefBlockChain(9)
+	blockPoolTester.refBlockChain[3] = []int{4, 7}
+	delete(blockPoolTester.refBlockChain, 6)
+
+	blockPool.Start()
+
+	peer1 := blockPoolTester.newPeer("peer1", 1, 9)
+	peer2 := blockPoolTester.newPeer("peer2", 2, 6)
+
+	peer1.AddPeer()
+	go peer1.serveBlocks(8, 9)
+	go peer1.serveBlockHashes(9, 8, 7, 3, 2)
+	peer1.serveBlocks(7, 8)
+	peer2.AddPeer()
+	go peer2.serveBlocks(5, 6)               //
+	go peer2.serveBlockHashes(6, 5, 4, 3, 2) // peer2 forks on block 3
+	peer2.serveBlocks(2, 3, 4, 5)            //
+	blockPool.RemovePeer("peer2")            // peer2 disconnects, peer1 is promoted again as best peer
+	go peer1.serveBlocks(1, 2)               //
+	go peer1.serveBlockHashes(2, 1, 0)       //
+	go peer1.serveBlocks(3, 7)               // tests that block requests on earlier fork are remembered and orphan section relinks to existing parent block
+	peer1.serveBlocks(0, 1)
+
+	blockPool.Wait(waitTimeout)
+	blockPool.Stop()
+	blockPoolTester.refBlockChain[9] = []int{}
+	blockPoolTester.refBlockChain[3] = []int{7}
+	delete(blockPoolTester.refBlockChain, 6)
+	delete(blockPoolTester.refBlockChain, 5)
+	delete(blockPoolTester.refBlockChain, 4)
+	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
+
+}
+
+func TestForkCompleteSectionSwitchBackByPeerSwitchBack(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	blockPoolTester.blockChain[0] = nil
+	blockPoolTester.initRefBlockChain(9)
+	blockPoolTester.refBlockChain[3] = []int{4, 7}
+	delete(blockPoolTester.refBlockChain, 6)
+
+	blockPool.Start()
+
+	peer1 := blockPoolTester.newPeer("peer1", 1, 9)
+	peer2 := blockPoolTester.newPeer("peer2", 2, 6)
+
+	peer1.AddPeer()
+	go peer1.serveBlocks(8, 9)
+	go peer1.serveBlockHashes(9, 8, 7)
+	peer1.serveBlocks(3, 7, 8) // make sure this section is complete
+	time.Sleep(1 * time.Second)
+	go peer1.serveBlockHashes(7, 3, 2)       // block 3/7 is section boundary
+	peer1.serveBlocks(2, 3)                  // partially complete sections block 2 missing
+	peer2.AddPeer()                          //
+	go peer2.serveBlocks(5, 6)               //
+	go peer2.serveBlockHashes(6, 5, 4, 3, 2) // peer2 forks on block 3
+	peer2.serveBlocks(2, 3, 4, 5)            // block 2 still missing.
+	blockPool.RemovePeer("peer2")            // peer2 disconnects, peer1 is promoted again as best peer
+	// peer1.serveBlockHashes(7, 3)             // tests that hash request from fork root is remembered even though section process completed
+	go peer1.serveBlockHashes(2, 1, 0) //
+	peer1.serveBlocks(0, 1, 2)
+
+	blockPool.Wait(waitTimeout)
+	blockPool.Stop()
+	blockPoolTester.refBlockChain[9] = []int{}
+	blockPoolTester.refBlockChain[3] = []int{7}
+	delete(blockPoolTester.refBlockChain, 6)
+	delete(blockPoolTester.refBlockChain, 5)
+	delete(blockPoolTester.refBlockChain, 4)
+	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
+
+}

blockpool/blockpool_util_test.go

@@ -0,0 +1,350 @@
+package blockpool
+
+import (
+	"fmt"
+	"math/big"
+	"sync"
+	"testing"
+	"time"
+
+	"github.com/ethereum/go-ethereum/blockpool/test"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/errs"
+	"github.com/ethereum/go-ethereum/ethutil"
+	"github.com/ethereum/go-ethereum/pow"
+)
+
+var (
+	waitTimeout                    = 60 * time.Second
+	testBlockHashesRequestInterval = 10 * time.Millisecond
+	testBlocksRequestInterval      = 10 * time.Millisecond
+	requestWatchInterval           = 10 * time.Millisecond
+)
+
+// test blockChain is an integer trie
+type blockChain map[int][]int
+
+// blockPoolTester provides the interface between tests and a blockPool
+//
+// refBlockChain is used to guide which blocks will be accepted as valid
+// blockChain gives the current state of the blockchain and
+// accumulates inserts so that we can check the resulting chain
+type blockPoolTester struct {
+	hashPool          *test.TestHashPool
+	lock              sync.RWMutex
+	reqlock           sync.RWMutex
+	blocksRequestsMap map[int]bool
+	refBlockChain     blockChain
+	blockChain        blockChain
+	blockPool         *BlockPool
+	t                 *testing.T
+}
+
+func newTestBlockPool(t *testing.T) (hashPool *test.TestHashPool, blockPool *BlockPool, b *blockPoolTester) {
+	hashPool = test.NewHashPool()
+	b = &blockPoolTester{
+		t:                 t,
+		hashPool:          hashPool,
+		blockChain:        make(blockChain),
+		refBlockChain:     make(blockChain),
+		blocksRequestsMap: make(map[int]bool),
+	}
+	b.blockPool = New(b.hasBlock, b.insertChain, b.verifyPoW)
+	blockPool = b.blockPool
+	blockPool.Config.BlockHashesRequestInterval = testBlockHashesRequestInterval
+	blockPool.Config.BlocksRequestInterval = testBlocksRequestInterval
+	return
+}
+
+func (self *blockPoolTester) Errorf(format string, params ...interface{}) {
+	fmt.Printf(format+"\n", params...)
+	self.t.Errorf(format, params...)
+}
+
+// blockPoolTester implements the 3 callbacks needed by the blockPool:
+// hasBlock, insetChain, verifyPoW
+func (self *blockPoolTester) hasBlock(block []byte) (ok bool) {
+	self.lock.RLock()
+	defer self.lock.RUnlock()
+	indexes := self.hashPool.HashesToIndexes([][]byte{block})
+	i := indexes[0]
+	_, ok = self.blockChain[i]
+	fmt.Printf("has block %v (%x...): %v\n", i, block[0:4], ok)
+	return
+}
+
+func (self *blockPoolTester) insertChain(blocks types.Blocks) error {
+	self.lock.Lock()
+	defer self.lock.Unlock()
+	var parent, child int
+	var children, refChildren []int
+	var ok bool
+	for _, block := range blocks {
+		child = self.hashPool.HashesToIndexes([][]byte{block.Hash()})[0]
+		_, ok = self.blockChain[child]
+		if ok {
+			fmt.Printf("block %v already in blockchain\n", child)
+			continue // already in chain
+		}
+		parent = self.hashPool.HashesToIndexes([][]byte{block.ParentHeaderHash})[0]
+		children, ok = self.blockChain[parent]
+		if !ok {
+			return fmt.Errorf("parent %v not in blockchain ", parent)
+		}
+		ok = false
+		var found bool
+		refChildren, found = self.refBlockChain[parent]
+		if found {
+			for _, c := range refChildren {
+				if c == child {
+					ok = true
+				}
+			}
+			if !ok {
+				return fmt.Errorf("invalid block %v", child)
+			}
+		} else {
+			ok = true
+		}
+		if ok {
+			// accept any blocks if parent not in refBlockChain
+			fmt.Errorf("blockchain insert %v -> %v\n", parent, child)
+			self.blockChain[parent] = append(children, child)
+			self.blockChain[child] = nil
+		}
+	}
+	return nil
+}
+
+func (self *blockPoolTester) verifyPoW(pblock pow.Block) bool {
+	return true
+}
+
+// test helper that compares the resulting blockChain to the desired blockChain
+func (self *blockPoolTester) checkBlockChain(blockChain map[int][]int) {
+	self.lock.RLock()
+	defer self.lock.RUnlock()
+	for k, v := range self.blockChain {
+		fmt.Printf("got: %v -> %v\n", k, v)
+	}
+	for k, v := range blockChain {
+		fmt.Printf("expected: %v -> %v\n", k, v)
+	}
+	if len(blockChain) != len(self.blockChain) {
+		self.Errorf("blockchain incorrect (zlength differ)")
+	}
+	for k, v := range blockChain {
+		vv, ok := self.blockChain[k]
+		if !ok || !test.ArrayEq(v, vv) {
+			self.Errorf("blockchain incorrect on %v -> %v (!= %v)", k, vv, v)
+		}
+	}
+}
+
+//
+
+// peerTester provides the peer callbacks for the blockPool
+// it registers actual callbacks so that the result can be compared to desired behaviour
+// provides helper functions to mock the protocol calls to the blockPool
+type peerTester struct {
+	blockHashesRequests []int
+	blocksRequests      [][]int
+	blocksRequestsMap   map[int]bool
+	peerErrors          []int
+	blockPool           *BlockPool
+	hashPool            *test.TestHashPool
+	lock                sync.RWMutex
+	bt                  *blockPoolTester
+	id                  string
+	td                  int
+	currentBlock        int
+	t                   *testing.T
+}
+
+// peerTester constructor takes hashPool and blockPool from the blockPoolTester
+func (self *blockPoolTester) newPeer(id string, td int, cb int) *peerTester {
+	return &peerTester{
+		id:                id,
+		td:                td,
+		currentBlock:      cb,
+		hashPool:          self.hashPool,
+		blockPool:         self.blockPool,
+		t:                 self.t,
+		bt:                self,
+		blocksRequestsMap: self.blocksRequestsMap,
+	}
+}
+
+func (self *peerTester) Errorf(format string, params ...interface{}) {
+	fmt.Printf(format+"\n", params...)
+	self.t.Errorf(format, params...)
+}
+
+// helper to compare actual and expected block requests
+func (self *peerTester) checkBlocksRequests(blocksRequests ...[]int) {
+	if len(blocksRequests) > len(self.blocksRequests) {
+		self.Errorf("blocks requests incorrect (length differ)\ngot %v\nexpected %v", self.blocksRequests, blocksRequests)
+	} else {
+		for i, rr := range blocksRequests {
+			r := self.blocksRequests[i]
+			if !test.ArrayEq(r, rr) {
+				self.Errorf("blocks requests incorrect\ngot %v\nexpected %v", self.blocksRequests, blocksRequests)
+			}
+		}
+	}
+}
+
+// helper to compare actual and expected block hash requests
+func (self *peerTester) checkBlockHashesRequests(blocksHashesRequests ...int) {
+	rr := blocksHashesRequests
+	self.lock.RLock()
+	r := self.blockHashesRequests
+	self.lock.RUnlock()
+	if len(r) != len(rr) {
+		self.Errorf("block hashes requests incorrect (length differ)\ngot %v\nexpected %v", r, rr)
+	} else {
+		if !test.ArrayEq(r, rr) {
+			self.Errorf("block hashes requests incorrect\ngot %v\nexpected %v", r, rr)
+		}
+	}
+}
+
+// waiter function used by peer.serveBlocks
+// blocking until requests appear
+// since block requests are sent to any random peers
+// block request map is shared between peers
+// times out after waitTimeout
+func (self *peerTester) waitBlocksRequests(blocksRequest ...int) {
+	timeout := time.After(waitTimeout)
+	rr := blocksRequest
+	for {
+		self.lock.RLock()
+		r := self.blocksRequestsMap
+		fmt.Printf("[%s] blocks request check %v (%v)\n", self.id, rr, r)
+		i := 0
+		for i = 0; i < len(rr); i++ {
+			_, ok := r[rr[i]]
+			if !ok {
+				break
+			}
+		}
+		self.lock.RUnlock()
+
+		if i == len(rr) {
+			return
+		}
+		time.Sleep(requestWatchInterval)
+		select {
+		case <-timeout:
+		default:
+		}
+	}
+}
+
+// waiter function used by peer.serveBlockHashes
+// blocking until requests appear
+// times out after a period
+func (self *peerTester) waitBlockHashesRequests(blocksHashesRequest int) {
+	timeout := time.After(waitTimeout)
+	rr := blocksHashesRequest
+	for i := 0; ; {
+		self.lock.RLock()
+		r := self.blockHashesRequests
+		self.lock.RUnlock()
+		fmt.Printf("[%s] block hash request check %v (%v)\n", self.id, rr, r)
+		for ; i < len(r); i++ {
+			if rr == r[i] {
+				return
+			}
+		}
+		time.Sleep(requestWatchInterval)
+		select {
+		case <-timeout:
+		default:
+		}
+	}
+}
+
+// mocks a simple blockchain 0 (genesis) ... n (head)
+func (self *blockPoolTester) initRefBlockChain(n int) {
+	for i := 0; i < n; i++ {
+		self.refBlockChain[i] = []int{i + 1}
+	}
+}
+
+// peerTester functions that mimic protocol calls to the blockpool
+//  registers the peer with the blockPool
+func (self *peerTester) AddPeer() bool {
+	hash := self.hashPool.IndexesToHashes([]int{self.currentBlock})[0]
+	return self.blockPool.AddPeer(big.NewInt(int64(self.td)), hash, self.id, self.requestBlockHashes, self.requestBlocks, self.peerError)
+}
+
+// peer sends blockhashes if and when gets a request
+func (self *peerTester) serveBlockHashes(indexes ...int) {
+	fmt.Printf("ready to serve block hashes %v\n", indexes)
+
+	self.waitBlockHashesRequests(indexes[0])
+	self.sendBlockHashes(indexes...)
+}
+
+func (self *peerTester) sendBlockHashes(indexes ...int) {
+	fmt.Printf("adding block hashes %v\n", indexes)
+	hashes := self.hashPool.IndexesToHashes(indexes)
+	i := 1
+	next := func() (hash []byte, ok bool) {
+		if i < len(hashes) {
+			hash = hashes[i]
+			ok = true
+			i++
+		}
+		return
+	}
+	self.blockPool.AddBlockHashes(next, self.id)
+}
+
+// peer sends blocks if and when there is a request
+// (in the shared request store, not necessarily to a person)
+func (self *peerTester) serveBlocks(indexes ...int) {
+	fmt.Printf("ready to serve blocks %v\n", indexes[1:])
+	self.waitBlocksRequests(indexes[1:]...)
+	self.sendBlocks(indexes...)
+}
+
+func (self *peerTester) sendBlocks(indexes ...int) {
+	fmt.Printf("adding blocks %v \n", indexes)
+	hashes := self.hashPool.IndexesToHashes(indexes)
+	for i := 1; i < len(hashes); i++ {
+		fmt.Printf("adding block %v %x\n", indexes[i], hashes[i][:4])
+		self.blockPool.AddBlock(&types.Block{HeaderHash: ethutil.Bytes(hashes[i]), ParentHeaderHash: ethutil.Bytes(hashes[i-1])}, self.id)
+	}
+}
+
+// peer callbacks
+// -1 is special: not found (a hash never seen)
+// records block hashes requests by the blockPool
+func (self *peerTester) requestBlockHashes(hash []byte) error {
+	indexes := self.hashPool.HashesToIndexes([][]byte{hash})
+	fmt.Printf("[%s] block hash request %v %x\n", self.id, indexes[0], hash[:4])
+	self.lock.Lock()
+	defer self.lock.Unlock()
+	self.blockHashesRequests = append(self.blockHashesRequests, indexes[0])
+	return nil
+}
+
+// records block requests by the blockPool
+func (self *peerTester) requestBlocks(hashes [][]byte) error {
+	indexes := self.hashPool.HashesToIndexes(hashes)
+	fmt.Printf("blocks request %v %x...\n", indexes, hashes[0][:4])
+	self.bt.reqlock.Lock()
+	defer self.bt.reqlock.Unlock()
+	self.blocksRequests = append(self.blocksRequests, indexes)
+	for _, i := range indexes {
+		self.blocksRequestsMap[i] = true
+	}
+	return nil
+}
+
+// records the error codes of all the peerErrors found the blockPool
+func (self *peerTester) peerError(err *errs.Error) {
+	self.peerErrors = append(self.peerErrors, err.Code)
+}

blockpool/config_test.go

@@ -0,0 +1,42 @@
+package blockpool
+
+import (
+	"testing"
+	"time"
+
+	"github.com/ethereum/go-ethereum/blockpool/test"
+)
+
+func TestBlockPoolConfig(t *testing.T) {
+	test.LogInit()
+	blockPool := &BlockPool{Config: &Config{}}
+	blockPool.Start()
+	c := blockPool.Config
+	test.CheckInt("BlockHashesBatchSize", c.BlockHashesBatchSize, blockHashesBatchSize, t)
+	test.CheckInt("BlockBatchSize", c.BlockBatchSize, blockBatchSize, t)
+	test.CheckInt("BlocksRequestRepetition", c.BlocksRequestRepetition, blocksRequestRepetition, t)
+	test.CheckInt("BlocksRequestMaxIdleRounds", c.BlocksRequestMaxIdleRounds, blocksRequestMaxIdleRounds, t)
+	test.CheckDuration("BlockHashesRequestInterval", c.BlockHashesRequestInterval, blockHashesRequestInterval, t)
+	test.CheckDuration("BlocksRequestInterval", c.BlocksRequestInterval, blocksRequestInterval, t)
+	test.CheckDuration("BlockHashesTimeout", c.BlockHashesTimeout, blockHashesTimeout, t)
+	test.CheckDuration("BlocksTimeout", c.BlocksTimeout, blocksTimeout, t)
+	test.CheckDuration("IdleBestPeerTimeout", c.IdleBestPeerTimeout, idleBestPeerTimeout, t)
+}
+
+func TestBlockPoolOverrideConfig(t *testing.T) {
+	test.LogInit()
+	blockPool := &BlockPool{Config: &Config{}}
+	c := &Config{128, 32, 1, 0, 300 * time.Millisecond, 100 * time.Millisecond, 90 * time.Second, 0, 30 * time.Second}
+
+	blockPool.Config = c
+	blockPool.Start()
+	test.CheckInt("BlockHashesBatchSize", c.BlockHashesBatchSize, 128, t)
+	test.CheckInt("BlockBatchSize", c.BlockBatchSize, 32, t)
+	test.CheckInt("BlocksRequestRepetition", c.BlocksRequestRepetition, blocksRequestRepetition, t)
+	test.CheckInt("BlocksRequestMaxIdleRounds", c.BlocksRequestMaxIdleRounds, blocksRequestMaxIdleRounds, t)
+	test.CheckDuration("BlockHashesRequestInterval", c.BlockHashesRequestInterval, 300*time.Millisecond, t)
+	test.CheckDuration("BlocksRequestInterval", c.BlocksRequestInterval, 100*time.Millisecond, t)
+	test.CheckDuration("BlockHashesTimeout", c.BlockHashesTimeout, 90*time.Second, t)
+	test.CheckDuration("BlocksTimeout", c.BlocksTimeout, blocksTimeout, t)
+	test.CheckDuration("IdleBestPeerTimeout", c.IdleBestPeerTimeout, 30*time.Second, t)
+}

blockpool/errors_test.go

@@ -0,0 +1,124 @@
+package blockpool
+
+import (
+	"testing"
+	"time"
+
+	"github.com/ethereum/go-ethereum/blockpool/test"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/pow"
+)
+
+func TestInvalidBlock(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	blockPoolTester.blockChain[0] = nil
+	blockPoolTester.initRefBlockChain(2)
+	blockPoolTester.refBlockChain[2] = []int{}
+
+	blockPool.Start()
+
+	peer1 := blockPoolTester.newPeer("peer1", 1, 3)
+	peer1.AddPeer()
+	go peer1.serveBlocks(2, 3)
+	go peer1.serveBlockHashes(3, 2, 1, 0)
+	peer1.serveBlocks(0, 1, 2)
+
+	blockPool.Wait(waitTimeout)
+	blockPool.Stop()
+	blockPoolTester.refBlockChain[2] = []int{}
+	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
+	if len(peer1.peerErrors) == 1 {
+		if peer1.peerErrors[0] != ErrInvalidBlock {
+			t.Errorf("wrong error, got %v, expected %v", peer1.peerErrors[0], ErrInvalidBlock)
+		}
+	} else {
+		t.Errorf("expected %v error, got %v", ErrInvalidBlock, peer1.peerErrors)
+	}
+}
+
+func TestVerifyPoW(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	blockPoolTester.blockChain[0] = nil
+	blockPoolTester.initRefBlockChain(3)
+	first := false
+	blockPoolTester.blockPool.verifyPoW = func(b pow.Block) bool {
+		bb, _ := b.(*types.Block)
+		indexes := blockPoolTester.hashPool.HashesToIndexes([][]byte{bb.Hash()})
+		if indexes[0] == 2 && !first {
+			first = true
+			return false
+		} else {
+			return true
+		}
+
+	}
+
+	blockPool.Start()
+
+	peer1 := blockPoolTester.newPeer("peer1", 1, 3)
+	peer2 := blockPoolTester.newPeer("peer2", 1, 3)
+	peer1.AddPeer()
+	peer2.AddPeer()
+	go peer1.serveBlocks(2, 3)
+	go peer1.serveBlockHashes(3, 2, 1, 0)
+	peer1.serveBlocks(0, 1, 2, 3)
+	blockPoolTester.blockPool.verifyPoW = func(b pow.Block) bool {
+		return true
+	}
+	peer2.serveBlocks(1, 2)
+
+	blockPool.Wait(waitTimeout)
+	blockPool.Stop()
+	blockPoolTester.refBlockChain[3] = []int{}
+	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
+	if len(peer1.peerErrors) == 1 {
+		if peer1.peerErrors[0] != ErrInvalidPoW {
+			t.Errorf("wrong error, expected %v, got %v", ErrInvalidPoW, peer1.peerErrors[0])
+		}
+	} else {
+		t.Errorf("expected %v error, got %v", ErrInvalidPoW, peer1.peerErrors)
+	}
+}
+
+func TestUnrequestedBlock(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	blockPoolTester.blockChain[0] = nil
+	blockPool.Start()
+
+	peer1 := blockPoolTester.newPeer("peer1", 1, 3)
+	peer1.AddPeer()
+	peer1.sendBlocks(1, 2)
+
+	// blockPool.Wait(waitTimeout)
+	blockPool.Stop()
+	if len(peer1.peerErrors) == 1 {
+		if peer1.peerErrors[0] != ErrUnrequestedBlock {
+			t.Errorf("wrong error, got %v, expected %v", peer1.peerErrors[0], ErrUnrequestedBlock)
+		}
+	} else {
+		t.Errorf("expected %v error, got %v", ErrUnrequestedBlock, peer1.peerErrors)
+	}
+}
+
+func TestErrInsufficientChainInfo(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	blockPool.Config.BlockHashesTimeout = 100 * time.Millisecond
+	blockPool.Start()
+
+	peer1 := blockPoolTester.newPeer("peer1", 1, 3)
+	peer1.AddPeer()
+
+	blockPool.Wait(waitTimeout)
+	blockPool.Stop()
+	if len(peer1.peerErrors) == 1 {
+		if peer1.peerErrors[0] != ErrInsufficientChainInfo {
+			t.Errorf("wrong error, got %v, expected %v", peer1.peerErrors[0], ErrInsufficientChainInfo)
+		}
+	} else {
+		t.Errorf("expected %v error, got %v", ErrInsufficientChainInfo, peer1.peerErrors)
+	}
+}

blockpool/peers.go

@@ -0,0 +1,547 @@
+package blockpool
+
+import (
+	"bytes"
+	"math/big"
+	"math/rand"
+	"sort"
+	"sync"
+	"time"
+
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/errs"
+	"github.com/ethereum/go-ethereum/ethutil"
+)
+
+type peer struct {
+	lock sync.RWMutex
+
+	// last known blockchain status
+	td               *big.Int
+	currentBlockHash []byte
+	currentBlock     *types.Block
+	parentHash       []byte
+	headSection      *section
+
+	id string
+
+	// peer callbacks
+	requestBlockHashes func([]byte) error
+	requestBlocks      func([][]byte) error
+	peerError          func(*errs.Error)
+	errors             *errs.Errors
+
+	sections [][]byte
+
+	// channels to push new head block and head section for peer a
+	currentBlockC chan *types.Block
+	headSectionC  chan *section
+
+	// channels to signal peer switch and peer quit to section processes
+	idleC   chan bool
+	switchC chan bool
+
+	quit chan bool
+	bp   *BlockPool
+
+	// timers for head section process
+	blockHashesRequestTimer <-chan time.Time
+	blocksRequestTimer      <-chan time.Time
+	suicideC                <-chan time.Time
+
+	idle bool
+}
+
+// peers is the component keeping a record of peers in a hashmap
+//
+type peers struct {
+	lock sync.RWMutex
+
+	bp     *BlockPool
+	errors *errs.Errors
+	peers  map[string]*peer
+	best   *peer
+	status *status
+}
+
+// peer constructor
+func (self *peers) newPeer(
+	td *big.Int,
+	currentBlockHash []byte,
+	id string,
+	requestBlockHashes func([]byte) error,
+	requestBlocks func([][]byte) error,
+	peerError func(*errs.Error),
+) (p *peer) {
+
+	p = &peer{
+		errors:             self.errors,
+		td:                 td,
+		currentBlockHash:   currentBlockHash,
+		id:                 id,
+		requestBlockHashes: requestBlockHashes,
+		requestBlocks:      requestBlocks,
+		peerError:          peerError,
+		currentBlockC:      make(chan *types.Block),
+		headSectionC:       make(chan *section),
+		bp:                 self.bp,
+		idle:               true,
+	}
+	// at creation the peer is recorded in the peer pool
+	self.peers[id] = p
+	return
+}
+
+// dispatches an error to a peer if still connected
+func (self *peers) peerError(id string, code int, format string, params ...interface{}) {
+	self.lock.RLock()
+	defer self.lock.RUnlock()
+	peer, ok := self.peers[id]
+	if ok {
+		peer.addError(code, format, params)
+	}
+	// blacklisting comes here
+}
+
+func (self *peer) addError(code int, format string, params ...interface{}) {
+	err := self.errors.New(code, format, params...)
+	self.peerError(err)
+}
+
+func (self *peer) setChainInfo(td *big.Int, c []byte) {
+	self.lock.Lock()
+	defer self.lock.Unlock()
+
+	self.td = td
+	self.currentBlockHash = c
+
+	self.currentBlock = nil
+	self.parentHash = nil
+	self.headSection = nil
+}
+
+func (self *peer) setChainInfoFromBlock(block *types.Block) {
+	self.lock.Lock()
+	defer self.lock.Unlock()
+	// use the optional TD to update peer td, this helps second best peer selection
+	// in case best peer is lost
+	if block.Td != nil && block.Td.Cmp(self.td) > 0 {
+		plog.DebugDetailf("setChainInfoFromBlock: update <%s> - head: %v->%v - TD: %v->%v", self.id, hex(self.currentBlockHash), hex(block.Hash()), self.td, block.Td)
+		self.td = block.Td
+		self.currentBlockHash = block.Hash()
+		self.parentHash = block.ParentHash()
+		self.currentBlock = block
+		self.headSection = nil
+	}
+	self.bp.wg.Add(1)
+	go func() {
+		self.currentBlockC <- block
+		self.bp.wg.Done()
+	}()
+}
+
+func (self *peers) requestBlocks(attempts int, hashes [][]byte) {
+	// distribute block request among known peers
+	self.lock.RLock()
+	defer self.lock.RUnlock()
+	peerCount := len(self.peers)
+	// on first attempt use the best peer
+	if attempts == 0 {
+		plog.DebugDetailf("request %v missing blocks from best peer <%s>", len(hashes), self.best.id)
+		self.best.requestBlocks(hashes)
+		return
+	}
+	repetitions := self.bp.Config.BlocksRequestRepetition
+	if repetitions > peerCount {
+		repetitions = peerCount
+	}
+	i := 0
+	indexes := rand.Perm(peerCount)[0:repetitions]
+	sort.Ints(indexes)
+
+	plog.DebugDetailf("request %v missing blocks from %v/%v peers", len(hashes), repetitions, peerCount)
+	for _, peer := range self.peers {
+		if i == indexes[0] {
+			plog.DebugDetailf("request length: %v", len(hashes))
+			plog.DebugDetailf("request %v missing blocks [%x/%x] from peer <%s>", len(hashes), hashes[0][:4], hashes[len(hashes)-1][:4], peer.id)
+			peer.requestBlocks(hashes)
+			indexes = indexes[1:]
+			if len(indexes) == 0 {
+				break
+			}
+		}
+		i++
+	}
+	self.bp.putHashSlice(hashes)
+}
+
+// addPeer implements the logic for blockpool.AddPeer
+// returns true iff peer is promoted as best peer in the pool
+func (self *peers) addPeer(
+	td *big.Int,
+	currentBlockHash []byte,
+	id string,
+	requestBlockHashes func([]byte) error,
+	requestBlocks func([][]byte) error,
+	peerError func(*errs.Error),
+) (best bool) {
+
+	var previousBlockHash []byte
+	self.lock.Lock()
+	p, found := self.peers[id]
+	if found {
+		if !bytes.Equal(p.currentBlockHash, currentBlockHash) {
+			previousBlockHash = p.currentBlockHash
+			plog.Debugf("addPeer: Update peer <%s> with td %v and current block %s (was %v)", id, td, hex(currentBlockHash), hex(previousBlockHash))
+			p.setChainInfo(td, currentBlockHash)
+			self.status.lock.Lock()
+			self.status.values.NewBlocks++
+			self.status.lock.Unlock()
+		}
+	} else {
+		p = self.newPeer(td, currentBlockHash, id, requestBlockHashes, requestBlocks, peerError)
+
+		self.status.lock.Lock()
+
+		self.status.peers[id]++
+		self.status.values.NewBlocks++
+		self.status.lock.Unlock()
+
+		plog.Debugf("addPeer: add new peer <%v> with td %v and current block %s", id, td, hex(currentBlockHash))
+	}
+	self.lock.Unlock()
+
+	// check peer current head
+	if self.bp.hasBlock(currentBlockHash) {
+		// peer not ahead
+		plog.Debugf("addPeer: peer <%v> with td %v and current block %s is behind", id, td, hex(currentBlockHash))
+		return false
+	}
+
+	if self.best == p {
+		// new block update for active current best peer -> request hashes
+		plog.Debugf("addPeer: <%s> already the best peer. Request new head section info from %s", id, hex(currentBlockHash))
+
+		if previousBlockHash != nil {
+			if entry := self.bp.get(previousBlockHash); entry != nil {
+				p.headSectionC <- nil
+				self.bp.activateChain(entry.section, p, nil)
+				p.sections = append(p.sections, previousBlockHash)
+			}
+		}
+		best = true
+	} else {
+		currentTD := ethutil.Big0
+		if self.best != nil {
+			currentTD = self.best.td
+		}
+		if td.Cmp(currentTD) > 0 {
+			self.status.lock.Lock()
+			self.status.bestPeers[p.id]++
+			self.status.lock.Unlock()
+			plog.Debugf("addPeer: peer <%v> promoted best peer", id)
+			self.bp.switchPeer(self.best, p)
+			self.best = p
+			best = true
+		}
+	}
+	return
+}
+
+// removePeer is called (via RemovePeer) by the eth protocol when the peer disconnects
+func (self *peers) removePeer(id string) {
+	self.lock.Lock()
+	defer self.lock.Unlock()
+
+	p, found := self.peers[id]
+	if !found {
+		return
+	}
+
+	delete(self.peers, id)
+	plog.Debugf("addPeer: remove peer <%v>", id)
+
+	// if current best peer is removed, need to find a better one
+	if self.best == p {
+		var newp *peer
+		// FIXME: own TD
+		max := ethutil.Big0
+		// peer with the highest self-acclaimed TD is chosen
+		for _, pp := range self.peers {
+			if pp.td.Cmp(max) > 0 {
+				max = pp.td
+				newp = pp
+			}
+		}
+		if newp != nil {
+			self.status.lock.Lock()
+			self.status.bestPeers[p.id]++
+			self.status.lock.Unlock()
+			plog.Debugf("addPeer: peer <%v> with td %v promoted best peer", newp.id, newp.td)
+		} else {
+			plog.Warnln("addPeer: no suitable peers found")
+		}
+		self.best = newp
+		self.bp.switchPeer(p, newp)
+	}
+}
+
+// switchPeer launches section processes
+func (self *BlockPool) switchPeer(oldp, newp *peer) {
+
+	// first quit AddBlockHashes, requestHeadSection and activateChain
+	if oldp != nil {
+		plog.DebugDetailf("<%s> quit peer processes", oldp.id)
+		close(oldp.switchC)
+	}
+	if newp != nil {
+		newp.idleC = make(chan bool)
+		newp.switchC = make(chan bool)
+		// if new best peer has no head section yet, create it and run it
+		// otherwise head section is an element of peer.sections
+		if newp.headSection == nil {
+			plog.DebugDetailf("[%s] head section for [%s] not created, requesting info", newp.id, hex(newp.currentBlockHash))
+
+			if newp.idle {
+				self.wg.Add(1)
+				newp.idle = false
+				self.syncing()
+			}
+
+			go func() {
+				newp.run()
+				if !newp.idle {
+					self.wg.Done()
+					newp.idle = true
+				}
+			}()
+
+		}
+
+		var connected = make(map[string]*section)
+		var sections [][]byte
+		for _, hash := range newp.sections {
+			plog.DebugDetailf("activate chain starting from section [%s]", hex(hash))
+			// if section not connected (ie, top of a contiguous sequence of sections)
+			if connected[string(hash)] == nil {
+				// if not deleted, then reread from pool (it can be orphaned top half of a split section)
+				if entry := self.get(hash); entry != nil {
+					self.activateChain(entry.section, newp, connected)
+					connected[string(hash)] = entry.section
+					sections = append(sections, hash)
+				}
+			}
+		}
+		plog.DebugDetailf("<%s> section processes (%v non-contiguous sequences, was %v before)", newp.id, len(sections), len(newp.sections))
+		// need to lock now that newp is exposed to section processes
+		newp.lock.Lock()
+		newp.sections = sections
+		newp.lock.Unlock()
+	}
+	// finally deactivate section process for sections where newp didnt activate
+	// newp activating section process changes the quit channel for this reason
+	if oldp != nil {
+		plog.DebugDetailf("<%s> quit section processes", oldp.id)
+		//
+		close(oldp.idleC)
+	}
+}
+
+func (self *peers) getPeer(id string) (p *peer, best bool) {
+	self.lock.RLock()
+	defer self.lock.RUnlock()
+	if self.best != nil && self.best.id == id {
+		return self.best, true
+	}
+	p = self.peers[id]
+	return
+}
+
+func (self *peer) handleSection(sec *section) {
+	self.lock.Lock()
+	defer self.lock.Unlock()
+
+	self.headSection = sec
+	self.blockHashesRequestTimer = nil
+
+	if sec == nil {
+		if self.idle {
+			self.idle = false
+			self.bp.wg.Add(1)
+			self.bp.syncing()
+		}
+
+		self.suicideC = time.After(self.bp.Config.BlockHashesTimeout)
+
+		plog.DebugDetailf("HeadSection: <%s> head block hash changed (mined block received). New head %s", self.id, hex(self.currentBlockHash))
+	} else {
+		if !self.idle {
+			self.idle = true
+			self.bp.wg.Done()
+		}
+		plog.DebugDetailf("HeadSection: <%s> head section [%s] created", self.id, sectionhex(sec))
+		self.suicideC = time.After(self.bp.Config.IdleBestPeerTimeout)
+	}
+}
+
+func (self *peer) getCurrentBlock(currentBlock *types.Block) {
+	// called by update or after AddBlock signals that head block of current peer is received
+	if currentBlock == nil {
+		if entry := self.bp.get(self.currentBlockHash); entry != nil {
+			entry.node.lock.Lock()
+			currentBlock = entry.node.block
+			entry.node.lock.Unlock()
+		}
+		if currentBlock != nil {
+			plog.DebugDetailf("HeadSection: <%s> head block %s found in blockpool", self.id, hex(self.currentBlockHash))
+		} else {
+			plog.DebugDetailf("HeadSection: <%s> head block %s not found... requesting it", self.id, hex(self.currentBlockHash))
+			self.requestBlocks([][]byte{self.currentBlockHash})
+			self.blocksRequestTimer = time.After(self.bp.Config.BlocksRequestInterval)
+			return
+		}
+	} else {
+		plog.DebugDetailf("HeadSection: <%s> head block %s received (parent: %s)", self.id, hex(self.currentBlockHash), hex(currentBlock.ParentHash()))
+	}
+
+	self.lock.Lock()
+	defer self.lock.Unlock()
+	self.currentBlock = currentBlock
+	self.parentHash = currentBlock.ParentHash()
+	plog.DebugDetailf("HeadSection: <%s> head block %s found (parent: [%s])... requesting  hashes", self.id, hex(self.currentBlockHash), hex(self.parentHash))
+	self.blockHashesRequestTimer = time.After(0)
+	self.blocksRequestTimer = nil
+}
+
+func (self *peer) getBlockHashes() {
+	//if connecting parent is found
+	if self.bp.hasBlock(self.parentHash) {
+		plog.DebugDetailf("HeadSection: <%s> parent block %s found in blockchain", self.id, hex(self.parentHash))
+		err := self.bp.insertChain(types.Blocks([]*types.Block{self.currentBlock}))
+		if err != nil {
+			self.addError(ErrInvalidBlock, "%v", err)
+
+			self.bp.status.lock.Lock()
+			self.bp.status.badPeers[self.id]++
+			self.bp.status.lock.Unlock()
+		}
+	} else {
+		if parent := self.bp.get(self.parentHash); parent != nil {
+			if self.bp.get(self.currentBlockHash) == nil {
+				plog.DebugDetailf("HeadSection: <%s> connecting parent %s found in pool... creating singleton section", self.id, hex(self.parentHash))
+				n := &node{
+					hash:    self.currentBlockHash,
+					block:   self.currentBlock,
+					hashBy:  self.id,
+					blockBy: self.id,
+				}
+				self.bp.newSection([]*node{n}).activate(self)
+			} else {
+				plog.DebugDetailf("HeadSection: <%s> connecting parent %s found in pool...head section [%s] exists...not requesting hashes", self.id, hex(self.parentHash), sectionhex(parent.section))
+				self.bp.activateChain(parent.section, self, nil)
+			}
+		} else {
+			plog.DebugDetailf("HeadSection: <%s> section [%s] requestBlockHashes", self.id, sectionhex(self.headSection))
+			self.requestBlockHashes(self.currentBlockHash)
+			self.blockHashesRequestTimer = time.After(self.bp.Config.BlockHashesRequestInterval)
+			return
+		}
+	}
+	self.blockHashesRequestTimer = nil
+	if !self.idle {
+		self.idle = true
+		self.suicideC = time.After(self.bp.Config.IdleBestPeerTimeout)
+		self.bp.wg.Done()
+	}
+}
+
+// main loop for head section process
+func (self *peer) run() {
+
+	self.lock.RLock()
+	switchC := self.switchC
+	currentBlockHash := self.currentBlockHash
+	self.lock.RUnlock()
+
+	self.blockHashesRequestTimer = nil
+
+	self.blocksRequestTimer = time.After(0)
+	self.suicideC = time.After(self.bp.Config.BlockHashesTimeout)
+
+	var quit chan bool
+
+	var ping = time.NewTicker(5 * time.Second)
+
+LOOP:
+	for {
+		select {
+		// to minitor section process behaviou
+		case <-ping.C:
+			plog.Debugf("HeadSection: <%s> section with head %s, idle: %v", self.id, hex(self.currentBlockHash), self.idle)
+
+		// idle timer started when process goes idle
+		case <-self.idleC:
+			if self.idle {
+				self.peerError(self.bp.peers.errors.New(ErrIdleTooLong, "timed out without providing new blocks...quitting", currentBlockHash))
+
+				self.bp.status.lock.Lock()
+				self.bp.status.badPeers[self.id]++
+				self.bp.status.lock.Unlock()
+			}
+
+		// signal from AddBlockHashes that head section for current best peer is created
+		// if sec == nil, it signals that chain info has updated (new block message)
+		case sec := <-self.headSectionC:
+			self.handleSection(sec)
+			// local var quit channel is linked to sections suicide channel so that
+			if sec == nil {
+				quit = nil
+			} else {
+				quit = sec.suicideC
+			}
+
+		// periodic check for block hashes or parent block/section
+		case <-self.blockHashesRequestTimer:
+			self.getBlockHashes()
+
+		// signal from AddBlock that head block of current best peer has been received
+		case currentBlock := <-self.currentBlockC:
+			self.getCurrentBlock(currentBlock)
+
+		// keep requesting until found or timed out
+		case <-self.blocksRequestTimer:
+			self.getCurrentBlock(nil)
+
+		// quitting on timeout
+		case <-self.suicideC:
+			self.peerError(self.bp.peers.errors.New(ErrInsufficientChainInfo, "timed out without providing block hashes or head block %x", currentBlockHash))
+
+			self.bp.status.lock.Lock()
+			self.bp.status.badPeers[self.id]++
+			self.bp.status.lock.Unlock()
+			// there is no persistence here, so GC will just take care of cleaning up
+			break LOOP
+
+		// signal for peer switch, quit
+		case <-switchC:
+			var complete = "incomplete "
+			if self.idle {
+				complete = "complete"
+			}
+			plog.Debugf("HeadSection: <%s> section with head %s %s... quit request loop due to peer switch", self.id, hex(self.currentBlockHash), complete)
+			break LOOP
+
+		// global quit for blockpool
+		case <-self.bp.quit:
+			break LOOP
+
+		// quit
+		case <-quit:
+			break LOOP
+		}
+	}
+	if !self.idle {
+		self.idle = true
+		self.bp.wg.Done()
+	}
+}

blockpool/peers_test.go

@@ -0,0 +1,120 @@
+package blockpool
+
+import (
+	"math/big"
+	"testing"
+
+	"github.com/ethereum/go-ethereum/blockpool/test"
+)
+
+// the actual tests
+func TestAddPeer(t *testing.T) {
+	test.LogInit()
+	_, blockPool, blockPoolTester := newTestBlockPool(t)
+	peer0 := blockPoolTester.newPeer("peer0", 1, 0)
+	peer1 := blockPoolTester.newPeer("peer1", 2, 1)
+	peer2 := blockPoolTester.newPeer("peer2", 3, 2)
+	var bestpeer *peer
+
+	blockPool.Start()
+
+	// pool
+	best := peer0.AddPeer()
+	if !best {
+		t.Errorf("peer0 (TD=1) not accepted as best")
+	}
+	if blockPool.peers.best.id != "peer0" {
+		t.Errorf("peer0 (TD=1) not set as best")
+	}
+
+	best = peer2.AddPeer()
+	if !best {
+		t.Errorf("peer2 (TD=3) not accepted as best")
+	}
+	if blockPool.peers.best.id != "peer2" {
+		t.Errorf("peer2 (TD=3) not set as best")
+	}
+	peer2.waitBlocksRequests(2)
+
+	best = peer1.AddPeer()
+	if best {
+		t.Errorf("peer1 (TD=2) accepted as best")
+	}
+	if blockPool.peers.best.id != "peer2" {
+		t.Errorf("peer2 (TD=3) not set any more as best")
+	}
+	if blockPool.peers.best.td.Cmp(big.NewInt(int64(3))) != 0 {
+		t.Errorf("peer1 TD not set")
+	}
+
+	peer2.td = 4
+	peer2.currentBlock = 3
+	best = peer2.AddPeer()
+	if !best {
+		t.Errorf("peer2 (TD=4) not accepted as best")
+	}
+	if blockPool.peers.best.id != "peer2" {
+		t.Errorf("peer2 (TD=4) not set as best")
+	}
+	if blockPool.peers.best.td.Cmp(big.NewInt(int64(4))) != 0 {
+		t.Errorf("peer2 TD not updated")
+	}
+	peer2.waitBlocksRequests(3)
+
+	peer1.td = 3
+	peer1.currentBlock = 2
+	best = peer1.AddPeer()
+	if best {
+		t.Errorf("peer1 (TD=3) should not be set as best")
+	}
+	if blockPool.peers.best.id == "peer1" {
+		t.Errorf("peer1 (TD=3) should not be set as best")
+	}
+	bestpeer, best = blockPool.peers.getPeer("peer1")
+	if bestpeer.td.Cmp(big.NewInt(int64(3))) != 0 {
+		t.Errorf("peer1 TD should be updated")
+	}
+
+	blockPool.RemovePeer("peer2")
+	bestpeer, best = blockPool.peers.getPeer("peer2")
+	if bestpeer != nil {
+		t.Errorf("peer2 not removed")
+	}
+
+	if blockPool.peers.best.id != "peer1" {
+		t.Errorf("existing peer1 (TD=3) should be set as best peer")
+	}
+	peer1.waitBlocksRequests(2)
+
+	blockPool.RemovePeer("peer1")
+	bestpeer, best = blockPool.peers.getPeer("peer1")
+	if bestpeer != nil {
+		t.Errorf("peer1 not removed")
+	}
+
+	if blockPool.peers.best.id != "peer0" {
+		t.Errorf("existing peer0 (TD=1) should be set as best peer")
+	}
+	peer0.waitBlocksRequests(0)
+
+	blockPool.RemovePeer("peer0")
+	bestpeer, best = blockPool.peers.getPeer("peer0")
+	if bestpeer != nil {
+		t.Errorf("peer1 not removed")
+	}
+
+	// adding back earlier peer ok
+	peer0.currentBlock = 3
+	best = peer0.AddPeer()
+	if !best {
+		t.Errorf("peer0 (TD=1) should be set as best")
+	}
+
+	if blockPool.peers.best.id != "peer0" {
+		t.Errorf("peer0 (TD=1) should be set as best")
+	}
+	peer0.waitBlocksRequests(3)
+
+	blockPool.Stop()
+
+}

blockpool/section.go

@@ -0,0 +1,668 @@
+package blockpool
+
+import (
+	"sync"
+	"time"
+
+	"github.com/ethereum/go-ethereum/core/types"
+)
+
+/*
+  section is the worker on each chain section in the block pool
+  - remove the section if there are blocks missing after an absolute time
+  - remove the section if there are maxIdleRounds of idle rounds of block requests with no response
+  - periodically polls the chain section for missing blocks which are then requested from peers
+  - registers the process controller on the peer so that if the peer is promoted as best peer the second time (after a disconnect of a better one), all active processes are switched back on unless they removed (inserted in blockchain, invalid or expired)
+  - when turned off (if peer disconnects and new peer connects with alternative chain), no blockrequests are made but absolute expiry timer is ticking
+  - when turned back on it recursively calls itself on the root of the next chain section
+*/
+type section struct {
+	lock sync.RWMutex
+
+	parent *section // connecting section back in time towards blockchain
+	child  *section // connecting section forward in time
+
+	top    *node // the topmost node = head node = youngest node within the chain section
+	bottom *node // the bottom node = root node = oldest node within the chain section
+	nodes  []*node
+
+	peer       *peer
+	parentHash []byte
+
+	blockHashes [][]byte
+
+	poolRootIndex int
+
+	bp *BlockPool
+
+	controlC  chan *peer     // to (de)register the current best peer
+	poolRootC chan *peer     // indicate connectedness to blockchain (well, known blocks)
+	offC      chan bool      // closed if process terminated
+	suicideC  chan bool      // initiate suicide on the section
+	quitInitC chan bool      // to signal end of initialisation
+	forkC     chan chan bool // freeze section process while splitting
+	switchC   chan bool      // switching
+	idleC     chan bool      // channel to indicate thai food
+	processC  chan *node     //
+	missingC  chan *node     //
+
+	blocksRequestTimer      <-chan time.Time
+	blockHashesRequestTimer <-chan time.Time
+	suicideTimer            <-chan time.Time
+
+	blocksRequests      int
+	blockHashesRequests int
+
+	blocksRequestsComplete      bool
+	blockHashesRequestsComplete bool
+	ready                       bool
+	same                        bool
+	initialised                 bool
+	active                      bool
+
+	step        int
+	idle        int
+	missing     int
+	lastMissing int
+	depth       int
+	invalid     bool
+	poolRoot    bool
+}
+
+//
+func (self *BlockPool) newSection(nodes []*node) *section {
+	sec := &section{
+		bottom:        nodes[len(nodes)-1],
+		top:           nodes[0],
+		nodes:         nodes,
+		poolRootIndex: len(nodes),
+		bp:            self,
+		controlC:      make(chan *peer),
+		poolRootC:     make(chan *peer),
+		offC:          make(chan bool),
+	}
+
+	for i, node := range nodes {
+		entry := &entry{node: node, section: sec, index: &index{i}}
+		self.set(node.hash, entry)
+	}
+
+	plog.DebugDetailf("[%s] setup section process", sectionhex(sec))
+
+	go sec.run()
+	return sec
+}
+
+func (self *section) addSectionToBlockChain(p *peer) {
+	self.bp.wg.Add(1)
+	go func() {
+
+		self.lock.Lock()
+		defer self.lock.Unlock()
+		defer func() {
+			self.bp.wg.Done()
+		}()
+
+		var node *node
+		var keys []string
+		var blocks []*types.Block
+		for self.poolRootIndex > 0 {
+			node = self.nodes[self.poolRootIndex-1]
+			node.lock.RLock()
+			block := node.block
+			node.lock.RUnlock()
+			if block == nil {
+				break
+			}
+			self.poolRootIndex--
+			keys = append(keys, string(node.hash))
+			blocks = append(blocks, block)
+		}
+
+		if len(blocks) == 0 {
+			return
+		}
+
+		self.bp.lock.Lock()
+		for _, key := range keys {
+			delete(self.bp.pool, key)
+		}
+		self.bp.lock.Unlock()
+
+		plog.Infof("[%s] insert %v blocks [%v/%v] into blockchain", sectionhex(self), len(blocks), hex(blocks[0].Hash()), hex(blocks[len(blocks)-1].Hash()))
+		err := self.bp.insertChain(blocks)
+		if err != nil {
+			self.invalid = true
+			self.bp.peers.peerError(node.blockBy, ErrInvalidBlock, "%v", err)
+			plog.Warnf("invalid block %x", node.hash)
+			plog.Warnf("penalise peers %v (hash), %v (block)", node.hashBy, node.blockBy)
+
+			// or invalid block and the entire chain needs to be removed
+			self.removeChain()
+		} else {
+			// if all blocks inserted in this section
+			// then need to try to insert blocks in child section
+			if self.poolRootIndex == 0 {
+				// if there is a child section, then recursively call itself:
+				// also if section process is not terminated,
+				// then signal blockchain connectivity with poolRootC
+				if child := self.bp.getChild(self); child != nil {
+					select {
+					case <-child.offC:
+						plog.DebugDetailf("[%s] add complete child section [%s] to the blockchain", sectionhex(self), sectionhex(child))
+					case child.poolRootC <- p:
+						plog.DebugDetailf("[%s] add incomplete child section [%s] to the blockchain", sectionhex(self), sectionhex(child))
+					}
+					child.addSectionToBlockChain(p)
+				} else {
+					plog.DebugDetailf("[%s] no child section in pool", sectionhex(self))
+				}
+				plog.DebugDetailf("[%s] section completely inserted to blockchain - remove", sectionhex(self))
+				// complete sections are removed. if called from within section process,
+				// this must run in its own go routine to avoid deadlock
+				self.remove()
+			}
+		}
+
+		self.bp.status.lock.Lock()
+		if err == nil {
+			headKey := string(blocks[0].ParentHash())
+			height := self.bp.status.chain[headKey] + len(blocks)
+			self.bp.status.chain[string(blocks[len(blocks)-1].Hash())] = height
+			if height > self.bp.status.values.LongestChain {
+				self.bp.status.values.LongestChain = height
+			}
+			delete(self.bp.status.chain, headKey)
+		}
+		self.bp.status.values.BlocksInChain += len(blocks)
+		self.bp.status.values.BlocksInPool -= len(blocks)
+		if err != nil {
+			self.bp.status.badPeers[node.blockBy]++
+		}
+		self.bp.status.lock.Unlock()
+
+	}()
+
+}
+
+func (self *section) run() {
+
+	// absolute time after which sub-chain is killed if not complete (some blocks are missing)
+	self.suicideC = make(chan bool)
+	self.forkC = make(chan chan bool)
+	self.suicideTimer = time.After(self.bp.Config.BlocksTimeout)
+
+	// node channels for the section
+	// container for missing block hashes
+	var checking bool
+	var ping = time.NewTicker(5 * time.Second)
+
+LOOP:
+	for !self.blockHashesRequestsComplete || !self.blocksRequestsComplete {
+
+		select {
+		case <-ping.C:
+			var name = "no peer"
+			if self.peer != nil {
+				name = self.peer.id
+			}
+			plog.DebugDetailf("[%s] peer <%s> active: %v", sectionhex(self), name, self.active)
+
+		// global quit from blockpool
+		case <-self.bp.quit:
+			break LOOP
+
+		// pause for peer switching
+		case <-self.switchC:
+			self.switchC = nil
+
+		case p := <-self.poolRootC:
+			// signal on pool root channel indicates that the blockpool is
+			// connected to the blockchain, insert the longest chain of blocks
+			// ignored in idle mode to avoid inserting chain sections of non-live peers
+			self.poolRoot = true
+			// switch off hash requests in case they were on
+			self.blockHashesRequestTimer = nil
+			self.blockHashesRequestsComplete = true
+			self.switchOn(p)
+
+		// peer quit or demoted, put section in idle mode
+		case <-self.idleC:
+			// peer quit or demoted, put section in idle mode
+			plog.Debugf("[%s] peer <%s> quit or demoted", sectionhex(self), self.peer.id)
+			self.switchOff()
+			self.idleC = nil
+
+		// timebomb - if section is not complete in time, nuke the entire chain
+		case <-self.suicideTimer:
+			self.removeChain()
+			plog.Debugf("[%s] timeout. (%v total attempts): missing %v/%v/%v...suicide", sectionhex(self), self.blocksRequests, self.missing, self.lastMissing, self.depth)
+			self.suicideTimer = nil
+			break LOOP
+
+		// closing suicideC triggers section suicide: removes section nodes from pool and terminates section process
+		case <-self.suicideC:
+			plog.DebugDetailf("[%s] quit", sectionhex(self))
+			break LOOP
+
+		// alarm for checking blocks in the section
+		case <-self.blocksRequestTimer:
+			plog.DebugDetailf("[%s] alarm: block request time", sectionhex(self))
+			self.processC = self.missingC
+
+		// alarm for checking parent of the section or sending out hash requests
+		case <-self.blockHashesRequestTimer:
+			plog.DebugDetailf("[%s] alarm: hash request time", sectionhex(self))
+			self.blockHashesRequest()
+
+		// activate this section process with a peer
+		case p := <-self.controlC:
+			if p == nil {
+				self.switchOff()
+			} else {
+				self.switchOn(p)
+			}
+			self.bp.wg.Done()
+		// blocks the process until section is split at the fork
+		case waiter := <-self.forkC:
+			<-waiter
+			self.initialised = false
+			self.quitInitC = nil
+
+		//
+		case n, ok := <-self.processC:
+			// channel closed, first iteration finished
+			if !ok && !self.initialised {
+				plog.DebugDetailf("[%s] section initalised: missing %v/%v/%v", sectionhex(self), self.missing, self.lastMissing, self.depth)
+				self.initialised = true
+				self.processC = nil
+				// self.processC = make(chan *node, self.missing)
+				self.checkRound()
+				checking = false
+				break
+			}
+			// plog.DebugDetailf("[%s] section proc step %v: missing %v/%v/%v", sectionhex(self), self.step, self.missing, self.lastMissing, self.depth)
+			if !checking {
+				self.step = 0
+				self.missing = 0
+				checking = true
+			}
+			self.step++
+
+			n.lock.RLock()
+			block := n.block
+			n.lock.RUnlock()
+
+			// if node has no block, request it (buffer it for batch request)
+			// feed it to missingC channel for the next round
+			if block == nil {
+				pos := self.missing % self.bp.Config.BlockBatchSize
+				if pos == 0 {
+					if self.missing != 0 {
+						self.bp.requestBlocks(self.blocksRequests, self.blockHashes[:])
+					}
+					self.blockHashes = self.bp.getHashSlice()
+				}
+				self.blockHashes[pos] = n.hash
+				self.missing++
+				self.missingC <- n
+			} else {
+				// checking for parent block
+				if self.poolRoot {
+					// if node has got block (received via async AddBlock call from protocol)
+					if self.step == self.lastMissing {
+						// current root of the pool
+						plog.DebugDetailf("[%s] received block for current pool root %s", sectionhex(self), hex(n.hash))
+						self.addSectionToBlockChain(self.peer)
+					}
+				} else {
+					if self.parentHash == nil && n == self.bottom {
+						self.parentHash = block.ParentHash()
+						plog.DebugDetailf("[%s] got parent head block hash %s...checking", sectionhex(self), hex(self.parentHash))
+						self.blockHashesRequest()
+					}
+				}
+			}
+			if self.initialised && self.step == self.lastMissing {
+				plog.DebugDetailf("[%s] check if new blocks arrived (attempt %v): missing %v/%v/%v", sectionhex(self), self.blocksRequests, self.missing, self.lastMissing, self.depth)
+				self.checkRound()
+				checking = false
+			}
+		} // select
+	} // for
+
+	close(self.offC)
+	if self.peer != nil {
+		self.active = false
+		self.bp.wg.Done()
+	}
+
+	plog.DebugDetailf("[%s] section process terminated: %v blocks retrieved (%v attempts), hash requests complete on root (%v attempts).", sectionhex(self), self.depth, self.blocksRequests, self.blockHashesRequests)
+
+}
+
+func (self *section) switchOn(newpeer *peer) {
+
+	oldpeer := self.peer
+	// reset switchC/switchC to current best peer
+	self.idleC = newpeer.idleC
+	self.switchC = newpeer.switchC
+	self.peer = newpeer
+
+	if oldpeer != newpeer {
+		oldp := "no peer"
+		newp := "no peer"
+		if oldpeer != nil {
+			oldp = oldpeer.id
+		}
+		if newpeer != nil {
+			newp = newpeer.id
+		}
+
+		plog.DebugDetailf("[%s] active mode <%s> -> <%s>", sectionhex(self), oldp, newp)
+	}
+
+	// activate section with current peer
+	if oldpeer == nil {
+		self.bp.wg.Add(1)
+		self.active = true
+
+		if !self.blockHashesRequestsComplete {
+			self.blockHashesRequestTimer = time.After(0)
+		}
+		if !self.blocksRequestsComplete {
+			if !self.initialised {
+				if self.quitInitC != nil {
+					<-self.quitInitC
+				}
+				self.missingC = make(chan *node, self.bp.Config.BlockHashesBatchSize)
+				self.processC = make(chan *node, self.bp.Config.BlockHashesBatchSize)
+				self.quitInitC = make(chan bool)
+
+				self.step = 0
+				self.missing = 0
+				self.depth = len(self.nodes)
+				self.lastMissing = self.depth
+
+				self.feedNodes()
+			} else {
+				self.blocksRequestTimer = time.After(0)
+			}
+		}
+	}
+}
+
+// put the section to idle mode
+func (self *section) switchOff() {
+	// active -> idle
+	if self.peer != nil {
+		oldp := "no peer"
+		oldpeer := self.peer
+		if oldpeer != nil {
+			oldp = oldpeer.id
+		}
+		plog.DebugDetailf("[%s] idle mode peer <%s> -> <> (%v total attempts): missing %v/%v/%v", sectionhex(self), oldp, self.blocksRequests, self.missing, self.lastMissing, self.depth)
+
+		self.active = false
+		self.peer = nil
+		// turn off timers
+		self.blocksRequestTimer = nil
+		self.blockHashesRequestTimer = nil
+
+		if self.quitInitC != nil {
+			<-self.quitInitC
+			self.quitInitC = nil
+		}
+		self.processC = nil
+		self.bp.wg.Done()
+	}
+}
+
+// iterates through nodes of a section to feed processC
+// used to initialise chain section
+func (self *section) feedNodes() {
+	// if not run at least once fully, launch iterator
+	self.bp.wg.Add(1)
+	go func() {
+		self.lock.Lock()
+		defer self.lock.Unlock()
+		defer func() {
+			self.bp.wg.Done()
+		}()
+		var n *node
+	INIT:
+		for _, n = range self.nodes {
+			select {
+			case self.processC <- n:
+			case <-self.bp.quit:
+				break INIT
+			}
+		}
+		close(self.processC)
+		close(self.quitInitC)
+	}()
+}
+
+func (self *section) blockHashesRequest() {
+
+	if self.switchC != nil {
+		self.bp.chainLock.Lock()
+		parentSection := self.parent
+
+		if parentSection == nil {
+
+			// only link to new parent if not switching peers
+			// this protects against synchronisation issue where during switching
+			// a demoted peer's fork will be chosen over the best peer's chain
+			// because relinking the correct chain (activateChain) is overwritten here in
+			// demoted peer's section process just before the section is put to idle mode
+			if self.parentHash != nil {
+				if parent := self.bp.get(self.parentHash); parent != nil {
+					parentSection = parent.section
+					plog.DebugDetailf("[%s] blockHashesRequest: parent section [%s] linked\n", sectionhex(self), sectionhex(parentSection))
+					link(parentSection, self)
+				} else {
+					if self.bp.hasBlock(self.parentHash) {
+						self.poolRoot = true
+						plog.DebugDetailf("[%s] blockHashesRequest: parentHash known ... inserting section in blockchain", sectionhex(self))
+						self.addSectionToBlockChain(self.peer)
+						self.blockHashesRequestTimer = nil
+						self.blockHashesRequestsComplete = true
+					}
+				}
+			}
+		}
+		self.bp.chainLock.Unlock()
+
+		if !self.poolRoot {
+			if parentSection != nil {
+				//  activate parent section with this peer
+				// but only if not during switch mode
+				plog.DebugDetailf("[%s] parent section [%s] activated\n", sectionhex(self), sectionhex(parentSection))
+				self.bp.activateChain(parentSection, self.peer, nil)
+				// if not root of chain, switch off
+				plog.DebugDetailf("[%s] parent found, hash requests deactivated (after %v total attempts)\n", sectionhex(self), self.blockHashesRequests)
+				self.blockHashesRequestTimer = nil
+				self.blockHashesRequestsComplete = true
+			} else {
+				self.blockHashesRequests++
+				plog.DebugDetailf("[%s] hash request on root (%v total attempts)\n", sectionhex(self), self.blockHashesRequests)
+				self.peer.requestBlockHashes(self.bottom.hash)
+				self.blockHashesRequestTimer = time.After(self.bp.Config.BlockHashesRequestInterval)
+			}
+		}
+	}
+}
+
+// checks number of missing blocks after each round of request and acts accordingly
+func (self *section) checkRound() {
+	if self.missing == 0 {
+		// no missing blocks
+		plog.DebugDetailf("[%s] section checked: got all blocks. process complete (%v total blocksRequests): missing %v/%v/%v", sectionhex(self), self.blocksRequests, self.missing, self.lastMissing, self.depth)
+		self.blocksRequestsComplete = true
+		self.blocksRequestTimer = nil
+	} else {
+		// some missing blocks
+		plog.DebugDetailf("[%s] section checked: missing %v/%v/%v", sectionhex(self), self.missing, self.lastMissing, self.depth)
+		self.blocksRequests++
+		pos := self.missing % self.bp.Config.BlockBatchSize
+		if pos == 0 {
+			pos = self.bp.Config.BlockBatchSize
+		}
+		self.bp.requestBlocks(self.blocksRequests, self.blockHashes[:pos])
+
+		// handle idle rounds
+		if self.missing == self.lastMissing {
+			// idle round
+			if self.same {
+				// more than once
+				self.idle++
+				// too many idle rounds
+				if self.idle >= self.bp.Config.BlocksRequestMaxIdleRounds {
+					plog.DebugDetailf("[%s] block requests had %v idle rounds (%v total attempts): missing %v/%v/%v\ngiving up...", sectionhex(self), self.idle, self.blocksRequests, self.missing, self.lastMissing, self.depth)
+					self.removeChain()
+				}
+			} else {
+				self.idle = 0
+			}
+			self.same = true
+		} else {
+			self.same = false
+		}
+		self.lastMissing = self.missing
+		// put processC offline
+		self.processC = nil
+		self.blocksRequestTimer = time.After(self.bp.Config.BlocksRequestInterval)
+	}
+}
+
+/*
+ link connects two sections via parent/child fields
+ creating a doubly linked list
+ caller must hold BlockPool chainLock
+*/
+func link(parent *section, child *section) {
+	if parent != nil {
+		exChild := parent.child
+		parent.child = child
+		if exChild != nil && exChild != child {
+			if child != nil {
+				// if child is nil it is not a real fork
+				plog.DebugDetailf("[%s] chain fork [%s] -> [%s]", sectionhex(parent), sectionhex(exChild), sectionhex(child))
+			}
+			exChild.parent = nil
+		}
+	}
+	if child != nil {
+		exParent := child.parent
+		if exParent != nil && exParent != parent {
+			if parent != nil {
+				// if parent is nil it is not a real fork, but suicide delinking section
+				plog.DebugDetailf("[%s] chain reverse fork [%s] -> [%s]", sectionhex(child), sectionhex(exParent), sectionhex(parent))
+			}
+			exParent.child = nil
+		}
+		child.parent = parent
+	}
+}
+
+/*
+  handle forks where connecting node is mid-section
+  by splitting section at fork
+  no splitting needed if connecting node is head of a section
+  caller must hold chain lock
+*/
+func (self *BlockPool) splitSection(parent *section, entry *entry) {
+	plog.DebugDetailf("[%s] split section at fork", sectionhex(parent))
+	parent.deactivate()
+	waiter := make(chan bool)
+	parent.wait(waiter)
+	chain := parent.nodes
+	parent.nodes = chain[entry.index.int:]
+	parent.top = parent.nodes[0]
+	parent.poolRootIndex -= entry.index.int
+	orphan := self.newSection(chain[0:entry.index.int])
+	link(orphan, parent.child)
+	close(waiter)
+	orphan.deactivate()
+}
+
+func (self *section) wait(waiter chan bool) {
+	self.forkC <- waiter
+}
+
+func (self *BlockPool) linkSections(nodes []*node, parent, child *section) (sec *section) {
+	// if new section is created, link it to parent/child sections
+	// and launch section process fetching block and further hashes
+	if len(nodes) > 0 {
+		sec = self.newSection(nodes)
+		plog.Debugf("[%s]->[%s](%v)->[%s] new chain section", sectionhex(parent), sectionhex(sec), len(nodes), sectionhex(child))
+		link(parent, sec)
+		link(sec, child)
+	} else {
+		if parent != nil && child != nil {
+			// now this can only happen if we allow response to hash request to include <from> hash
+			// in this case we just link parent and child (without needing root block of child section)
+			plog.Debugf("[%s]->[%s] connecting known sections", sectionhex(parent), sectionhex(child))
+			link(parent, child)
+		}
+	}
+	return
+}
+
+func (self *section) activate(p *peer) {
+	self.bp.wg.Add(1)
+	select {
+	case <-self.offC:
+		plog.DebugDetailf("[%s] completed section process. cannot activate for peer <%s>", sectionhex(self), p.id)
+		self.bp.wg.Done()
+	case self.controlC <- p:
+		plog.DebugDetailf("[%s] activate section process for peer <%s>", sectionhex(self), p.id)
+	}
+}
+
+func (self *section) deactivate() {
+	self.bp.wg.Add(1)
+	self.controlC <- nil
+}
+
+// removes this section exacly
+func (self *section) remove() {
+	select {
+	case <-self.offC:
+		close(self.suicideC)
+		plog.DebugDetailf("[%s] remove: suicide", sectionhex(self))
+	case <-self.suicideC:
+		plog.DebugDetailf("[%s] remove: suicided already", sectionhex(self))
+	default:
+		plog.DebugDetailf("[%s] remove: suicide", sectionhex(self))
+		close(self.suicideC)
+	}
+	self.unlink()
+	self.bp.remove(self)
+	plog.DebugDetailf("[%s] removed section.", sectionhex(self))
+
+}
+
+// remove a section and all its descendents from the pool
+func (self *section) removeChain() {
+	// need to get the child before removeSection delinks the section
+	self.bp.chainLock.RLock()
+	child := self.child
+	self.bp.chainLock.RUnlock()
+
+	plog.DebugDetailf("[%s] remove chain", sectionhex(self))
+	self.remove()
+	if child != nil {
+		child.removeChain()
+	}
+}
+
+// unlink a section from its parent/child
+func (self *section) unlink() {
+	// first delink from child and parent under chainlock
+	self.bp.chainLock.Lock()
+	link(nil, self)
+	link(self, nil)
+	self.bp.chainLock.Unlock()
+}

blockpool/status.go

@@ -0,0 +1,109 @@
+package blockpool
+
+import (
+	"fmt"
+	"sync"
+)
+
+type statusValues struct {
+	BlockHashes       int    // number of hashes fetched this session
+	BlockHashesInPool int    // number of hashes currently in  the pool
+	Blocks            int    // number of blocks fetched this session
+	BlocksInPool      int    // number of blocks currently in  the pool
+	BlocksInChain     int    // number of blocks inserted/connected to the blockchain this session
+	NewBlocks         int    // number of new blocks (received with new blocks msg) this session
+	Forks             int    // number of chain forks in the blockchain (poolchain) this session
+	LongestChain      int    // the longest chain inserted since the start of session (aka session blockchain height)
+	BestPeer          []byte //Pubkey
+	Syncing           bool   // requesting, updating etc
+	Peers             int    // cumulative number of all different registered peers since the start of this session
+	ActivePeers       int    // cumulative number of all different peers that contributed a hash or block since the start of this session
+	LivePeers         int    // number of live peers registered with the block pool (supposed to be redundant but good sanity check
+	BestPeers         int    // cumulative number of all peers that at some point were promoted as best peer (peer with highest TD status) this session
+	BadPeers          int    // cumulative number of all peers that violated the protocol (invalid block or pow, unrequested hash or block, etc)
+}
+
+type status struct {
+	lock        sync.Mutex
+	values      statusValues
+	chain       map[string]int
+	peers       map[string]int
+	bestPeers   map[string]int
+	badPeers    map[string]int
+	activePeers map[string]int
+}
+
+func newStatus() *status {
+	return &status{
+		chain:       make(map[string]int),
+		peers:       make(map[string]int),
+		bestPeers:   make(map[string]int),
+		badPeers:    make(map[string]int),
+		activePeers: make(map[string]int),
+	}
+}
+
+type Status struct {
+	statusValues
+}
+
+// blockpool status for reporting
+func (self *BlockPool) Status() *Status {
+	self.status.lock.Lock()
+	defer self.status.lock.Unlock()
+	self.status.values.ActivePeers = len(self.status.activePeers)
+	self.status.values.BestPeers = len(self.status.bestPeers)
+	self.status.values.BadPeers = len(self.status.badPeers)
+	self.status.values.LivePeers = len(self.peers.peers)
+	self.status.values.Peers = len(self.status.peers)
+	self.status.values.BlockHashesInPool = len(self.pool)
+	return &Status{self.status.values}
+}
+
+func (self *Status) String() string {
+	return fmt.Sprintf(`
+  Syncing:            %v
+  BlockHashes:        %v
+  BlockHashesInPool:  %v
+  Blocks:             %v
+  BlocksInPool:       %v
+  BlocksInChain:      %v
+  NewBlocks:          %v
+  Forks:              %v
+  LongestChain:       %v
+  Peers:              %v
+  LivePeers:          %v
+  ActivePeers:        %v
+  BestPeers:          %v
+  BadPeers:           %v
+`,
+		self.Syncing,
+		self.BlockHashes,
+		self.BlockHashesInPool,
+		self.Blocks,
+		self.BlocksInPool,
+		self.BlocksInChain,
+		self.NewBlocks,
+		self.Forks,
+		self.LongestChain,
+		self.Peers,
+		self.LivePeers,
+		self.ActivePeers,
+		self.BestPeers,
+		self.BadPeers,
+	)
+}
+
+func (self *BlockPool) syncing() {
+	self.status.lock.Lock()
+	defer self.status.lock.Unlock()
+	if !self.status.values.Syncing {
+		self.status.values.Syncing = true
+		go func() {
+			self.wg.Wait()
+			self.status.lock.Lock()
+			self.status.values.Syncing = false
+			self.status.lock.Unlock()
+		}()
+	}
+}

blockpool/status_test.go

@@ -0,0 +1,228 @@
+package blockpool
+
+import (
+	"fmt"
+	"testing"
+	// "time"
+
+	"github.com/ethereum/go-ethereum/blockpool/test"
+)
+
+var statusFields = []string{
+	"BlockHashes",
+	"BlockHashesInPool",
+	"Blocks",
+	"BlocksInPool",
+	"BlocksInChain",
+	"NewBlocks",
+	"Forks",
+	"LongestChain",
+	"Peers",
+	"LivePeers",
+	"ActivePeers",
+	"BestPeers",
+	"BadPeers",
+}
+
+func getStatusValues(s *Status) []int {
+	return []int{
+		s.BlockHashes,
+		s.BlockHashesInPool,
+		s.Blocks,
+		s.BlocksInPool,
+		s.BlocksInChain,
+		s.NewBlocks,
+		s.Forks,
+		s.LongestChain,
+		s.Peers,
+		s.LivePeers,
+		s.ActivePeers,
+		s.BestPeers,
+		s.BadPeers,
+	}
+}
+
+func checkStatus(t *testing.T, bp *BlockPool, syncing bool, expected []int) (err error) {
+	s := bp.Status()
+	if s.Syncing != syncing {
+		t.Errorf("status for Syncing incorrect. expected %v, got %v", syncing, s.Syncing)
+	}
+	got := getStatusValues(s)
+	for i, v := range expected {
+		err = test.CheckInt(statusFields[i], got[i], v, t)
+		if err != nil {
+			return err
+		}
+		fmt.Printf("%v: %v (%v)\n", statusFields[i], got[i], v)
+	}
+	return
+}
+
+// func TestBlockPoolStatus(t *testing.T) {
+// 	test.LogInit()
+// 	_, blockPool, blockPoolTester := newTestBlockPool(t)
+// 	blockPoolTester.blockChain[0] = nil
+// 	blockPoolTester.initRefBlockChain(12)
+// 	blockPoolTester.refBlockChain[3] = []int{4, 7}
+// 	delete(blockPoolTester.refBlockChain, 6)
+
+// 	blockPool.Start()
+
+// 	peer1 := blockPoolTester.newPeer("peer1", 1, 9)
+// 	peer2 := blockPoolTester.newPeer("peer2", 2, 6)
+// 	peer3 := blockPoolTester.newPeer("peer3", 3, 11)
+// 	peer4 := blockPoolTester.newPeer("peer4", 1, 9)
+// 	peer2.blocksRequestsMap = peer1.blocksRequestsMap
+
+// 	var expected []int
+// 	var err error
+// 	expected = []int{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}
+// 	err = checkStatus(t, blockPool, false, expected)
+// 	if err != nil {
+// 		return
+// 	}
+
+// 	peer1.AddPeer()
+// 	expected = []int{0, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 0}
+// 	err = checkStatus(t, blockPool, true, expected)
+// 	if err != nil {
+// 		return
+// 	}
+
+// 	peer1.serveBlocks(8, 9)
+// 	expected = []int{0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0}
+// 	err = checkStatus(t, blockPool, true, expected)
+// 	if err != nil {
+// 		return
+// 	}
+
+// 	peer1.serveBlockHashes(9, 8, 7, 3, 2)
+// 	expected = []int{5, 5, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0}
+// 	err = checkStatus(t, blockPool, true, expected)
+// 	if err != nil {
+// 		return
+// 	}
+
+// 	peer1.serveBlocks(3, 7, 8)
+// 	expected = []int{5, 5, 3, 3, 0, 1, 0, 0, 1, 1, 1, 1, 0}
+// 	err = checkStatus(t, blockPool, true, expected)
+// 	if err != nil {
+// 		return
+// 	}
+
+// 	peer1.serveBlocks(2, 3)
+// 	expected = []int{5, 5, 4, 4, 0, 1, 0, 0, 1, 1, 1, 1, 0}
+// 	err = checkStatus(t, blockPool, true, expected)
+// 	if err != nil {
+// 		return
+// 	}
+
+// 	peer4.AddPeer()
+// 	expected = []int{5, 5, 4, 4, 0, 2, 0, 0, 2, 2, 1, 1, 0}
+// 	err = checkStatus(t, blockPool, true, expected)
+// 	if err != nil {
+// 		return
+// 	}
+
+// 	peer4.sendBlockHashes(12, 11)
+// 	expected = []int{5, 5, 4, 4, 0, 2, 0, 0, 2, 2, 1, 1, 0}
+// 	err = checkStatus(t, blockPool, true, expected)
+// 	if err != nil {
+// 		return
+// 	}
+
+// 	peer2.AddPeer()
+// 	expected = []int{5, 5, 4, 4, 0, 3, 0, 0, 3, 3, 1, 2, 0}
+// 	err = checkStatus(t, blockPool, true, expected)
+// 	if err != nil {
+// 		return
+// 	}
+
+// 	peer2.serveBlocks(5, 6)
+// 	peer2.serveBlockHashes(6, 5, 4, 3, 2)
+// 	expected = []int{8, 8, 5, 5, 0, 3, 1, 0, 3, 3, 2, 2, 0}
+// 	err = checkStatus(t, blockPool, true, expected)
+// 	if err != nil {
+// 		return
+// 	}
+
+// 	peer2.serveBlocks(2, 3, 4)
+// 	expected = []int{8, 8, 6, 6, 0, 3, 1, 0, 3, 3, 2, 2, 0}
+// 	err = checkStatus(t, blockPool, true, expected)
+// 	if err != nil {
+// 		return
+// 	}
+
+// 	blockPool.RemovePeer("peer2")
+// 	expected = []int{8, 8, 6, 6, 0, 3, 1, 0, 3, 2, 2, 2, 0}
+// 	err = checkStatus(t, blockPool, true, expected)
+// 	if err != nil {
+// 		return
+// 	}
+
+// 	peer1.serveBlockHashes(2, 1, 0)
+// 	expected = []int{9, 9, 6, 6, 0, 3, 1, 0, 3, 2, 2, 2, 0}
+// 	err = checkStatus(t, blockPool, true, expected)
+// 	if err != nil {
+// 		return
+// 	}
+
+// 	peer1.serveBlocks(1, 2)
+// 	expected = []int{9, 9, 7, 7, 0, 3, 1, 0, 3, 2, 2, 2, 0}
+// 	err = checkStatus(t, blockPool, true, expected)
+// 	if err != nil {
+// 		return
+// 	}
+
+// 	peer1.serveBlocks(4, 5)
+// 	expected = []int{9, 9, 8, 8, 0, 3, 1, 0, 3, 2, 2, 2, 0}
+// 	err = checkStatus(t, blockPool, true, expected)
+// 	if err != nil {
+// 		return
+// 	}
+
+// 	peer3.AddPeer()
+// 	expected = []int{9, 9, 8, 8, 0, 4, 1, 0, 4, 3, 2, 3, 0}
+// 	err = checkStatus(t, blockPool, true, expected)
+// 	if err != nil {
+// 		return
+// 	}
+
+// 	peer3.serveBlocks(10, 11)
+// 	expected = []int{9, 9, 9, 9, 0, 4, 1, 0, 4, 3, 3, 3, 0}
+// 	err = checkStatus(t, blockPool, true, expected)
+// 	if err != nil {
+// 		return
+// 	}
+
+// 	peer3.serveBlockHashes(11, 10, 9)
+// 	expected = []int{11, 11, 9, 9, 0, 4, 1, 0, 4, 3, 3, 3, 0}
+// 	err = checkStatus(t, blockPool, true, expected)
+// 	if err != nil {
+// 		return
+// 	}
+
+// 	peer4.sendBlocks(11, 12)
+// 	expected = []int{11, 11, 9, 9, 0, 4, 1, 0, 4, 3, 4, 3, 1}
+// 	err = checkStatus(t, blockPool, true, expected)
+// 	if err != nil {
+// 		return
+// 	}
+// 	peer3.serveBlocks(9, 10)
+// 	expected = []int{11, 11, 10, 10, 0, 4, 1, 0, 4, 3, 4, 3, 1}
+// 	err = checkStatus(t, blockPool, true, expected)
+// 	if err != nil {
+// 		return
+// 	}
+
+// 	peer3.serveBlocks(0, 1)
+// 	blockPool.Wait(waitTimeout)
+// 	time.Sleep(200 * time.Millisecond)
+// 	expected = []int{11, 3, 11, 3, 8, 4, 1, 8, 4, 3, 4, 3, 1}
+// 	err = checkStatus(t, blockPool, false, expected)
+// 	if err != nil {
+// 		return
+// 	}
+
+// 	blockPool.Stop()
+// }

blockpool/test/hash_pool.go

@@ -0,0 +1,57 @@
+package test
+
+import (
+	"sync"
+
+	"github.com/ethereum/go-ethereum/crypto"
+)
+
+// test helpers
+// TODO: move into common test helper package (see p2p/crypto etc.)
+
+func NewHashPool() *TestHashPool {
+	return &TestHashPool{intToHash: make(intToHash), hashToInt: make(hashToInt)}
+}
+
+type intToHash map[int][]byte
+
+type hashToInt map[string]int
+
+// hashPool is a test helper, that allows random hashes to be referred to by integers
+type TestHashPool struct {
+	intToHash
+	hashToInt
+	lock sync.Mutex
+}
+
+func newHash(i int) []byte {
+	return crypto.Sha3([]byte(string(i)))
+}
+
+func (self *TestHashPool) IndexesToHashes(indexes []int) (hashes [][]byte) {
+	self.lock.Lock()
+	defer self.lock.Unlock()
+	for _, i := range indexes {
+		hash, found := self.intToHash[i]
+		if !found {
+			hash = newHash(i)
+			self.intToHash[i] = hash
+			self.hashToInt[string(hash)] = i
+		}
+		hashes = append(hashes, hash)
+	}
+	return
+}
+
+func (self *TestHashPool) HashesToIndexes(hashes [][]byte) (indexes []int) {
+	self.lock.Lock()
+	defer self.lock.Unlock()
+	for _, hash := range hashes {
+		i, found := self.hashToInt[string(hash)]
+		if !found {
+			i = -1
+		}
+		indexes = append(indexes, i)
+	}
+	return
+}

blockpool/test/logger.go

@@ -0,0 +1,78 @@
+package test
+
+import (
+	"log"
+	"os"
+	"sync"
+	"testing"
+
+	"github.com/ethereum/go-ethereum/logger"
+)
+
+var once sync.Once
+
+/* usage:
+func TestFunc(t *testing.T) {
+    test.LogInit()
+    // test
+}
+*/
+func LogInit() {
+	once.Do(func() {
+		var logsys = logger.NewStdLogSystem(os.Stdout, log.LstdFlags, logger.LogLevel(logger.DebugDetailLevel))
+		logger.AddLogSystem(logsys)
+	})
+}
+
+type testLogger struct{ t *testing.T }
+
+/* usage:
+func TestFunc(t *testing.T) {
+    defer test.Testlog.Detach()
+    // test
+}
+*/
+func Testlog(t *testing.T) testLogger {
+	logger.Reset()
+	l := testLogger{t}
+	logger.AddLogSystem(l)
+	return l
+}
+
+func (testLogger) GetLogLevel() logger.LogLevel { return logger.DebugLevel }
+func (testLogger) SetLogLevel(logger.LogLevel)  {}
+
+func (l testLogger) LogPrint(level logger.LogLevel, msg string) {
+	l.t.Logf("%s", msg)
+}
+
+func (testLogger) Detach() {
+	logger.Flush()
+	logger.Reset()
+}
+
+type benchLogger struct{ b *testing.B }
+
+/* usage:
+func BenchmarkFunc(b *testing.B) {
+    defer test.Benchlog.Detach()
+    // test
+}
+*/
+func Benchlog(b *testing.B) benchLogger {
+	logger.Reset()
+	l := benchLogger{b}
+	logger.AddLogSystem(l)
+	return l
+}
+
+func (benchLogger) GetLogLevel() logger.LogLevel { return logger.Silence }
+
+func (benchLogger) SetLogLevel(logger.LogLevel) {}
+func (l benchLogger) LogPrint(level logger.LogLevel, msg string) {
+	l.b.Logf("%s", msg)
+}
+func (benchLogger) Detach() {
+	logger.Flush()
+	logger.Reset()
+}

blockpool/test/util.go

@@ -0,0 +1,35 @@
+package test
+
+import (
+	"fmt"
+	"testing"
+	"time"
+)
+
+func CheckInt(name string, got int, expected int, t *testing.T) (err error) {
+	if got != expected {
+		t.Errorf("status for %v incorrect. expected %v, got %v", name, expected, got)
+		err = fmt.Errorf("")
+	}
+	return
+}
+
+func CheckDuration(name string, got time.Duration, expected time.Duration, t *testing.T) (err error) {
+	if got != expected {
+		t.Errorf("status for %v incorrect. expected %v, got %v", name, expected, got)
+		err = fmt.Errorf("")
+	}
+	return
+}
+
+func ArrayEq(a, b []int) bool {
+	if len(a) != len(b) {
+		return false
+	}
+	for i := range a {
+		if a[i] != b[i] {
+			return false
+		}
+	}
+	return true
+}

cmd/ethereum/cmd.go

@@ -1,43 +1,31 @@
-/*
-	This file is part of go-ethereum
+// Copyright (c) 2013-2014, Jeffrey Wilcke. All rights reserved.
+//
+// This library is free software; you can redistribute it and/or
+// modify it under the terms of the GNU General Public
+// License as published by the Free Software Foundation; either
+// version 2.1 of the License, or (at your option) any later version.
+//
+// This library is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+// General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this library; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+// MA 02110-1301  USA
 
-	go-ethereum is free software: you can redistribute it and/or modify
-	it under the terms of the GNU General Public License as published by
-	the Free Software Foundation, either version 3 of the License, or
-	(at your option) any later version.
-
-	go-ethereum is distributed in the hope that it will be useful,
-	but WITHOUT ANY WARRANTY; without even the implied warranty of
-	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-	GNU General Public License for more details.
-
-	You should have received a copy of the GNU General Public License
-	along with go-ethereum.  If not, see <http://www.gnu.org/licenses/>.
-*/
-/**
- * @authors
- * 	Jeffrey Wilcke <i@jev.io>
- */
 package main
 
 import (
 	"io/ioutil"
 	"os"
 
-	"github.com/ethereum/go-ethereum/cmd/ethereum/repl"
-	"github.com/ethereum/go-ethereum/cmd/utils"
 	"github.com/ethereum/go-ethereum/eth"
 	"github.com/ethereum/go-ethereum/javascript"
+	"github.com/ethereum/go-ethereum/xeth"
 )
 
-func InitJsConsole(ethereum *eth.Ethereum) {
-	repl := ethrepl.NewJSRepl(ethereum)
-	go repl.Start()
-	utils.RegisterInterrupt(func(os.Signal) {
-		repl.Stop()
-	})
-}
-
 func ExecJsFile(ethereum *eth.Ethereum, InputFile string) {
 	file, err := os.Open(InputFile)
 	if err != nil {
@@ -47,9 +35,6 @@ func ExecJsFile(ethereum *eth.Ethereum, InputFile string) {
 	if err != nil {
 		clilogger.Fatalln(err)
 	}
-	re := javascript.NewJSRE(ethereum)
-	utils.RegisterInterrupt(func(os.Signal) {
-		re.Stop()
-	})
+	re := javascript.NewJSRE(xeth.New(ethereum))
 	re.Run(string(content))
 }

cmd/ethereum/main.go

@@ -26,6 +26,7 @@ import (
 	"runtime"
 	"time"
 
+	"github.com/ethereum/go-ethereum/cmd/ethereum/repl"
 	"github.com/ethereum/go-ethereum/cmd/utils"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/eth"
@@ -137,7 +138,12 @@ func main() {
 	}
 
 	if StartJsConsole {
-		InitJsConsole(ethereum)
+		repl := ethrepl.NewJSRepl(ethereum)
+		repl.Start()
+		utils.RegisterInterrupt(func(os.Signal) {
+			repl.Stop()
+		})
+
 	} else if len(InputFile) > 0 {
 		ExecJsFile(ethereum, InputFile)
 	}

cmd/ethereum/repl/repl.go

@@ -24,10 +24,14 @@ import (
 	"os"
 	"path"
 
+	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/eth"
 	"github.com/ethereum/go-ethereum/ethutil"
 	"github.com/ethereum/go-ethereum/javascript"
 	"github.com/ethereum/go-ethereum/logger"
+	"github.com/ethereum/go-ethereum/state"
+	"github.com/ethereum/go-ethereum/xeth"
+	"github.com/obscuren/otto"
 )
 
 var repllogger = logger.NewLogger("REPL")
@@ -38,7 +42,9 @@ type Repl interface {
 }
 
 type JSRepl struct {
-	re *javascript.JSRE
+	re       *javascript.JSRE
+	ethereum *eth.Ethereum
+	xeth     *xeth.XEth
 
 	prompt string
 
@@ -53,7 +59,11 @@ func NewJSRepl(ethereum *eth.Ethereum) *JSRepl {
 		panic(err)
 	}
 
-	return &JSRepl{re: javascript.NewJSRE(ethereum), prompt: "> ", history: hist}
+	xeth := xeth.New(ethereum)
+	repl := &JSRepl{re: javascript.NewJSRE(xeth), xeth: xeth, ethereum: ethereum, prompt: "> ", history: hist}
+	repl.initStdFuncs()
+
+	return repl
 }
 
 func (self *JSRepl) Start() {
@@ -80,7 +90,6 @@ func (self *JSRepl) Start() {
 func (self *JSRepl) Stop() {
 	if self.running {
 		self.running = false
-		self.re.Stop()
 		repllogger.Infoln("exit JS Console")
 		self.history.Close()
 	}
@@ -101,3 +110,92 @@ func (self *JSRepl) parseInput(code string) {
 
 	self.PrintValue(value)
 }
+
+func (self *JSRepl) initStdFuncs() {
+	t, _ := self.re.Vm.Get("eth")
+	eth := t.Object()
+	eth.Set("connect", self.connect)
+	eth.Set("stopMining", self.stopMining)
+	eth.Set("startMining", self.startMining)
+	eth.Set("dump", self.dump)
+	eth.Set("export", self.export)
+}
+
+/*
+ * The following methods are natively implemented javascript functions
+ */
+
+func (self *JSRepl) dump(call otto.FunctionCall) otto.Value {
+	var block *types.Block
+
+	if len(call.ArgumentList) > 0 {
+		if call.Argument(0).IsNumber() {
+			num, _ := call.Argument(0).ToInteger()
+			block = self.ethereum.ChainManager().GetBlockByNumber(uint64(num))
+		} else if call.Argument(0).IsString() {
+			hash, _ := call.Argument(0).ToString()
+			block = self.ethereum.ChainManager().GetBlock(ethutil.Hex2Bytes(hash))
+		} else {
+			fmt.Println("invalid argument for dump. Either hex string or number")
+		}
+
+		if block == nil {
+			fmt.Println("block not found")
+
+			return otto.UndefinedValue()
+		}
+
+	} else {
+		block = self.ethereum.ChainManager().CurrentBlock()
+	}
+
+	statedb := state.New(block.Root(), self.ethereum.Db())
+
+	v, _ := self.re.Vm.ToValue(statedb.RawDump())
+
+	return v
+}
+
+func (self *JSRepl) stopMining(call otto.FunctionCall) otto.Value {
+	self.xeth.Miner().Stop()
+
+	return otto.TrueValue()
+}
+
+func (self *JSRepl) startMining(call otto.FunctionCall) otto.Value {
+	self.xeth.Miner().Start()
+	return otto.TrueValue()
+}
+
+func (self *JSRepl) connect(call otto.FunctionCall) otto.Value {
+	nodeURL, err := call.Argument(0).ToString()
+	if err != nil {
+		return otto.FalseValue()
+	}
+	if err := self.ethereum.SuggestPeer(nodeURL); err != nil {
+		return otto.FalseValue()
+	}
+	return otto.TrueValue()
+}
+
+func (self *JSRepl) export(call otto.FunctionCall) otto.Value {
+	if len(call.ArgumentList) == 0 {
+		fmt.Println("err: require file name")
+		return otto.FalseValue()
+	}
+
+	fn, err := call.Argument(0).ToString()
+	if err != nil {
+		fmt.Println(err)
+		return otto.FalseValue()
+	}
+
+	data := self.ethereum.ChainManager().Export()
+
+	if err := ethutil.WriteFile(fn, data); err != nil {
+		fmt.Println(err)
+		return otto.FalseValue()
+	}
+
+	return otto.TrueValue()
+}

cmd/evm/main.go

@@ -65,7 +65,6 @@ func main() {
 	statedb := state.New(nil, db)
 	sender := statedb.NewStateObject([]byte("sender"))
 	receiver := statedb.NewStateObject([]byte("receiver"))
-	//receiver.SetCode([]byte(*code))
 	receiver.SetCode(ethutil.Hex2Bytes(*code))
 
 	vmenv := NewEnv(statedb, []byte("evmuser"), ethutil.Big(*value))

cmd/utils/cmd.go

@@ -32,7 +32,6 @@ import (
 	"github.com/ethereum/go-ethereum/eth"
 	"github.com/ethereum/go-ethereum/ethutil"
 	"github.com/ethereum/go-ethereum/logger"
-	"github.com/ethereum/go-ethereum/miner"
 	"github.com/ethereum/go-ethereum/rlp"
 	rpchttp "github.com/ethereum/go-ethereum/rpc/http"
 	"github.com/ethereum/go-ethereum/state"
@@ -169,32 +168,6 @@ func StartRpc(ethereum *eth.Ethereum, RpcListenAddress string, RpcPort int) {
 	}
 }
 
-var gminer *miner.Miner
-
-func GetMiner() *miner.Miner {
-	return gminer
-}
-
-func StartMining(ethereum *eth.Ethereum) bool {
-	if !ethereum.Mining {
-		ethereum.Mining = true
-		addr := ethereum.KeyManager().Address()
-
-		go func() {
-			clilogger.Infoln("Start mining")
-			if gminer == nil {
-				gminer = miner.New(addr, ethereum, 4)
-			}
-			gminer.Start()
-		}()
-		RegisterInterrupt(func(os.Signal) {
-			StopMining(ethereum)
-		})
-		return true
-	}
-	return false
-}
-
 func FormatTransactionData(data string) []byte {
 	d := ethutil.StringToByteFunc(data, func(s string) (ret []byte) {
 		slice := regexp.MustCompile("\\n|\\s").Split(s, 1000000000)
@@ -208,18 +181,6 @@ func FormatTransactionData(data string) []byte {
 	return d
 }
 
-func StopMining(ethereum *eth.Ethereum) bool {
-	if ethereum.Mining && gminer != nil {
-		gminer.Stop()
-		clilogger.Infoln("Stopped mining")
-		ethereum.Mining = false
-
-		return true
-	}
-
-	return false
-}
-
 // Replay block
 func BlockDo(ethereum *eth.Ethereum, hash []byte) error {
 	block := ethereum.ChainManager().GetBlock(hash)

core/block_processor.go

@@ -12,7 +12,6 @@ import (
 	"github.com/ethereum/go-ethereum/event"
 	"github.com/ethereum/go-ethereum/logger"
 	"github.com/ethereum/go-ethereum/pow"
-	"github.com/ethereum/go-ethereum/pow/ezp"
 	"github.com/ethereum/go-ethereum/state"
 	"gopkg.in/fatih/set.v0"
 )
@@ -46,11 +45,11 @@ type BlockProcessor struct {
 	eventMux *event.TypeMux
 }
 
-func NewBlockProcessor(db ethutil.Database, txpool *TxPool, chainManager *ChainManager, eventMux *event.TypeMux) *BlockProcessor {
+func NewBlockProcessor(db ethutil.Database, pow pow.PoW, txpool *TxPool, chainManager *ChainManager, eventMux *event.TypeMux) *BlockProcessor {
 	sm := &BlockProcessor{
 		db:       db,
 		mem:      make(map[string]*big.Int),
-		Pow:      ezp.New(),
+		Pow:      pow,
 		bc:       chainManager,
 		eventMux: eventMux,
 		txpool:   txpool,
@@ -105,6 +104,9 @@ func (self *BlockProcessor) ApplyTransaction(coinbase *state.StateObject, stated
 
 	return receipt, txGas, err
 }
+func (self *BlockProcessor) ChainManager() *ChainManager {
+	return self.bc
+}
 
 func (self *BlockProcessor) ApplyTransactions(coinbase *state.StateObject, statedb *state.StateDB, block *types.Block, txs types.Transactions, transientProcess bool) (types.Receipts, types.Transactions, types.Transactions, types.Transactions, error) {
 	var (
@@ -174,10 +176,15 @@ func (sm *BlockProcessor) processWithParent(block, parent *types.Block) (td *big
 	state := state.New(parent.Root(), sm.db)
 
 	// Block validation
-	if err = sm.ValidateBlock(block, parent); err != nil {
+	if err = sm.ValidateHeader(block.Header(), parent.Header()); err != nil {
 		return
 	}
 
+	// There can be at most two uncles
+	if len(block.Uncles()) > 2 {
+		return nil, ValidationError("Block can only contain one uncle (contained %v)", len(block.Uncles()))
+	}
+
 	receipts, err := sm.TransitionState(state, parent, block, false)
 	if err != nil {
 		return
@@ -204,7 +211,6 @@ func (sm *BlockProcessor) processWithParent(block, parent *types.Block) (td *big
 	// Tre receipt Trie's root (R = (Tr [[H1, R1], ... [Hn, R1]]))
 	receiptSha := types.DeriveSha(receipts)
 	if bytes.Compare(receiptSha, header.ReceiptHash) != 0 {
-		fmt.Println("receipts", receipts)
 		err = fmt.Errorf("validating receipt root. received=%x got=%x", header.ReceiptHash, receiptSha)
 		return
 	}
@@ -237,36 +243,41 @@ func (sm *BlockProcessor) processWithParent(block, parent *types.Block) (td *big
 // Validates the current block. Returns an error if the block was invalid,
 // an uncle or anything that isn't on the current block chain.
 // Validation validates easy over difficult (dagger takes longer time = difficult)
-func (sm *BlockProcessor) ValidateBlock(block, parent *types.Block) error {
-	if len(block.Header().Extra) > 1024 {
-		return fmt.Errorf("Block extra data too long (%d)", len(block.Header().Extra))
+func (sm *BlockProcessor) ValidateHeader(block, parent *types.Header) error {
+	if len(block.Extra) > 1024 {
+		return fmt.Errorf("Block extra data too long (%d)", len(block.Extra))
 	}
 
 	expd := CalcDifficulty(block, parent)
-	if expd.Cmp(block.Header().Difficulty) != 0 {
-		return fmt.Errorf("Difficulty check failed for block %v, %v", block.Header().Difficulty, expd)
+	if expd.Cmp(block.Difficulty) != 0 {
+		return fmt.Errorf("Difficulty check failed for block %v, %v", block.Difficulty, expd)
 	}
 
-	expl := CalcGasLimit(parent, block)
-	if expl.Cmp(block.Header().GasLimit) != 0 {
-		return fmt.Errorf("GasLimit check failed for block %v, %v", block.Header().GasLimit, expl)
+	//expl := CalcGasLimit(parent, block)
+	//if expl.Cmp(block.Header().GasLimit) != 0 {
+
+	// block.gasLimit - parent.gasLimit <= parent.gasLimit / 1024
+	a := new(big.Int).Sub(block.GasLimit, parent.GasLimit)
+	b := new(big.Int).Div(parent.GasLimit, big.NewInt(1024))
+	if a.Cmp(b) > 0 {
+		return fmt.Errorf("GasLimit check failed for block %v (%v > %v)", block.GasLimit, a, b)
 	}
 
-	if block.Time() < parent.Time() {
-		return ValidationError("Block timestamp not after prev block (%v - %v)", block.Header().Time, parent.Header().Time)
+	if block.Time < parent.Time {
+		return ValidationError("Block timestamp not after prev block (%v - %v)", block.Time, parent.Time)
 	}
 
-	if block.Time() > time.Now().Unix() {
+	if int64(block.Time) > time.Now().Unix() {
 		return BlockFutureErr
 	}
 
-	if new(big.Int).Sub(block.Number(), parent.Number()).Cmp(big.NewInt(1)) != 0 {
+	if new(big.Int).Sub(block.Number, parent.Number).Cmp(big.NewInt(1)) != 0 {
 		return BlockNumberErr
 	}
 
 	// Verify the nonce of the block. Return an error if it's not valid
-	if !sm.Pow.Verify(block) {
-		return ValidationError("Block's nonce is invalid (= %v)", ethutil.Bytes2Hex(block.Header().Nonce))
+	if !sm.Pow.Verify(types.NewBlockWithHeader(block)) {
+		return ValidationError("Block's nonce is invalid (= %x)", block.Nonce)
 	}
 
 	return nil
@@ -276,25 +287,41 @@ func (sm *BlockProcessor) AccumulateRewards(statedb *state.StateDB, block, paren
 	reward := new(big.Int).Set(BlockReward)
 
 	ancestors := set.New()
+	uncles := set.New()
+	ancestorHeaders := make(map[string]*types.Header)
 	for _, ancestor := range sm.bc.GetAncestors(block, 7) {
-		ancestors.Add(string(ancestor.Hash()))
+		hash := string(ancestor.Hash())
+		ancestorHeaders[hash] = ancestor.Header()
+		ancestors.Add(hash)
+		// Include ancestors uncles in the uncle set. Uncles must be unique.
+		for _, uncle := range ancestor.Uncles() {
+			uncles.Add(string(uncle.Hash()))
+		}
 	}
 
-	uncles := set.New()
 	uncles.Add(string(block.Hash()))
 	for _, uncle := range block.Uncles() {
 		if uncles.Has(string(uncle.Hash())) {
 			// Error not unique
 			return UncleError("Uncle not unique")
 		}
+
 		uncles.Add(string(uncle.Hash()))
 
+		if ancestors.Has(string(uncle.Hash())) {
+			return UncleError("Uncle is ancestor")
+		}
+
 		if !ancestors.Has(string(uncle.ParentHash)) {
 			return UncleError(fmt.Sprintf("Uncle's parent unknown (%x)", uncle.ParentHash[0:4]))
 		}
 
+		if err := sm.ValidateHeader(uncle, ancestorHeaders[string(uncle.ParentHash)]); err != nil {
+			return ValidationError(fmt.Sprintf("%v", err))
+		}
+
 		if !sm.Pow.Verify(types.NewBlockWithHeader(uncle)) {
-			return ValidationError("Uncle's nonce is invalid (= %v)", ethutil.Bytes2Hex(uncle.Nonce))
+			return ValidationError("Uncle's nonce is invalid (= %x)", uncle.Nonce)
 		}
 
 		r := new(big.Int)

core/chain_makers.go

@@ -0,0 +1,142 @@
+package core
+
+import (
+	"fmt"
+	"math/big"
+
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/ethutil"
+	"github.com/ethereum/go-ethereum/event"
+	"github.com/ethereum/go-ethereum/pow"
+	"github.com/ethereum/go-ethereum/state"
+)
+
+// So we can generate blocks easily
+type FakePow struct{}
+
+func (f FakePow) Search(block pow.Block, stop <-chan struct{}) (uint64, []byte, []byte) {
+	return 0, nil, nil
+}
+func (f FakePow) Verify(block pow.Block) bool { return true }
+func (f FakePow) GetHashrate() int64          { return 0 }
+func (f FakePow) Turbo(bool)                  {}
+
+// So we can deterministically seed different blockchains
+var (
+	CanonicalSeed = 1
+	ForkSeed      = 2
+)
+
+// Utility functions for making chains on the fly
+// Exposed for sake of testing from other packages (eg. go-ethash)
+func NewBlockFromParent(addr []byte, parent *types.Block) *types.Block {
+	return newBlockFromParent(addr, parent)
+}
+
+func MakeBlock(bman *BlockProcessor, parent *types.Block, i int, db ethutil.Database, seed int) *types.Block {
+	return makeBlock(bman, parent, i, db, seed)
+}
+
+func MakeChain(bman *BlockProcessor, parent *types.Block, max int, db ethutil.Database, seed int) types.Blocks {
+	return makeChain(bman, parent, max, db, seed)
+}
+
+func NewChainMan(block *types.Block, eventMux *event.TypeMux, db ethutil.Database) *ChainManager {
+	return newChainManager(block, eventMux, db)
+}
+
+func NewBlockProc(db ethutil.Database, txpool *TxPool, cman *ChainManager, eventMux *event.TypeMux) *BlockProcessor {
+	return newBlockProcessor(db, txpool, cman, eventMux)
+}
+
+func NewCanonical(n int, db ethutil.Database) (*BlockProcessor, error) {
+	return newCanonical(n, db)
+}
+
+// block time is fixed at 10 seconds
+func newBlockFromParent(addr []byte, parent *types.Block) *types.Block {
+	block := types.NewBlock(parent.Hash(), addr, parent.Root(), ethutil.BigPow(2, 32), 0, "")
+	block.SetUncles(nil)
+	block.SetTransactions(nil)
+	block.SetReceipts(nil)
+
+	header := block.Header()
+	header.Difficulty = CalcDifficulty(block.Header(), parent.Header())
+	header.Number = new(big.Int).Add(parent.Header().Number, ethutil.Big1)
+	header.Time = parent.Header().Time + 10
+	header.GasLimit = CalcGasLimit(parent, block)
+
+	block.Td = parent.Td
+
+	return block
+}
+
+// Actually make a block by simulating what miner would do
+// we seed chains by the first byte of the coinbase
+func makeBlock(bman *BlockProcessor, parent *types.Block, i int, db ethutil.Database, seed int) *types.Block {
+	addr := ethutil.LeftPadBytes([]byte{byte(i)}, 20)
+	addr[0] = byte(seed)
+	block := newBlockFromParent(addr, parent)
+	state := state.New(block.Root(), db)
+	cbase := state.GetOrNewStateObject(addr)
+	cbase.SetGasPool(CalcGasLimit(parent, block))
+	cbase.AddBalance(BlockReward)
+	state.Update(ethutil.Big0)
+	block.SetRoot(state.Root())
+	return block
+}
+
+// Make a chain with real blocks
+// Runs ProcessWithParent to get proper state roots
+func makeChain(bman *BlockProcessor, parent *types.Block, max int, db ethutil.Database, seed int) types.Blocks {
+	bman.bc.currentBlock = parent
+	blocks := make(types.Blocks, max)
+	for i := 0; i < max; i++ {
+		block := makeBlock(bman, parent, i, db, seed)
+		td, err := bman.processWithParent(block, parent)
+		if err != nil {
+			fmt.Println("process with parent failed", err)
+			panic(err)
+		}
+		block.Td = td
+		blocks[i] = block
+		parent = block
+	}
+	return blocks
+}
+
+// Create a new chain manager starting from given block
+// Effectively a fork factory
+func newChainManager(block *types.Block, eventMux *event.TypeMux, db ethutil.Database) *ChainManager {
+	bc := &ChainManager{db: db, genesisBlock: GenesisBlock(db), eventMux: eventMux}
+	if block == nil {
+		bc.Reset()
+	} else {
+		bc.currentBlock = block
+		bc.td = block.Td
+	}
+	return bc
+}
+
+// block processor with fake pow
+func newBlockProcessor(db ethutil.Database, txpool *TxPool, cman *ChainManager, eventMux *event.TypeMux) *BlockProcessor {
+	bman := NewBlockProcessor(db, FakePow{}, txpool, newChainManager(nil, eventMux, db), eventMux)
+	return bman
+}
+
+// Make a new, deterministic canonical chain by running InsertChain
+// on result of makeChain
+func newCanonical(n int, db ethutil.Database) (*BlockProcessor, error) {
+	eventMux := &event.TypeMux{}
+	txpool := NewTxPool(eventMux)
+
+	bman := newBlockProcessor(db, txpool, newChainManager(nil, eventMux, db), eventMux)
+	bman.bc.SetProcessor(bman)
+	parent := bman.bc.CurrentBlock()
+	if n == 0 {
+		return bman, nil
+	}
+	lchain := makeChain(bman, parent, n, db, CanonicalSeed)
+	err := bman.bc.InsertChain(lchain)
+	return bman, err
+}

core/chain_manager.go

@@ -14,7 +14,10 @@ import (
 	"github.com/ethereum/go-ethereum/state"
 )
 
-var chainlogger = logger.NewLogger("CHAIN")
+var (
+	chainlogger = logger.NewLogger("CHAIN")
+	jsonlogger  = logger.NewJsonLogger()
+)
 
 type ChainEvent struct {
 	Block *types.Block
@@ -25,14 +28,16 @@ type StateQuery interface {
 	GetAccount(addr []byte) *state.StateObject
 }
 
-func CalcDifficulty(block, parent *types.Block) *big.Int {
+func CalcDifficulty(block, parent *types.Header) *big.Int {
 	diff := new(big.Int)
 
-	adjust := new(big.Int).Rsh(parent.Difficulty(), 10)
-	if block.Time() >= parent.Time()+8 {
-		diff.Sub(parent.Difficulty(), adjust)
+	//adjust := new(big.Int).Rsh(parent.Difficulty(), 10)
+	//if block.Time() >= parent.Time()+8 {
+	adjust := new(big.Int).Div(parent.Difficulty, big.NewInt(2048))
+	if (block.Time - parent.Time) < 8 {
+		diff.Add(parent.Difficulty, adjust)
 	} else {
-		diff.Add(parent.Difficulty(), adjust)
+		diff.Sub(parent.Difficulty, adjust)
 	}
 
 	return diff
@@ -122,7 +127,7 @@ func (self *ChainManager) Status() (td *big.Int, currentBlock []byte, genesisBlo
 	self.mu.RLock()
 	defer self.mu.RUnlock()
 
-	return self.td, self.currentBlock.Hash(), self.Genesis().Hash()
+	return self.td, self.currentBlock.Hash(), self.genesisBlock.Hash()
 }
 
 func (self *ChainManager) SetProcessor(proc types.BlockProcessor) {
@@ -192,7 +197,7 @@ func (bc *ChainManager) NewBlock(coinbase []byte) *types.Block {
 		coinbase,
 		root,
 		ethutil.BigPow(2, 32),
-		nil,
+		0,
 		"")
 	block.SetUncles(nil)
 	block.SetTransactions(nil)
@@ -201,7 +206,7 @@ func (bc *ChainManager) NewBlock(coinbase []byte) *types.Block {
 	parent := bc.currentBlock
 	if parent != nil {
 		header := block.Header()
-		header.Difficulty = CalcDifficulty(block, parent)
+		header.Difficulty = CalcDifficulty(block.Header(), parent.Header())
 		header.Number = new(big.Int).Add(parent.Header().Number, ethutil.Big1)
 		header.GasLimit = CalcGasLimit(parent, block)
 
@@ -395,11 +400,11 @@ func (self *ChainManager) InsertChain(chain types.Blocks) error {
 
 		var canonical, split bool
 		self.mu.Lock()
+		cblock := self.currentBlock
 		{
 			// Write block to database. Eventually we'll have to improve on this and throw away blocks that are
 			// not in the canonical chain.
 			self.write(block)
-			cblock := self.currentBlock
 			// Compare the TD of the last known block in the canonical chain to make sure it's greater.
 			// At this point it's possible that a different chain (fork) becomes the new canonical chain.
 			if td.Cmp(self.td) > 0 {
@@ -417,6 +422,12 @@ func (self *ChainManager) InsertChain(chain types.Blocks) error {
 		self.mu.Unlock()
 
 		if canonical {
+			jsonlogger.LogJson(&logger.EthChainNewHead{
+				BlockHash:     ethutil.Bytes2Hex(block.Hash()),
+				BlockNumber:   block.Number(),
+				ChainHeadHash: ethutil.Bytes2Hex(cblock.Hash()),
+				BlockPrevHash: ethutil.Bytes2Hex(block.ParentHash()),
+			})
 			self.setTransState(state.New(block.Root(), self.db))
 			self.eventMux.Post(ChainEvent{block, td})
 		}

core/chain_manager_test.go

@@ -3,6 +3,7 @@ package core
 import (
 	"bytes"
 	"fmt"
+	"math/big"
 	"os"
 	"path"
 	"runtime"
@@ -21,6 +22,75 @@ func init() {
 	ethutil.ReadConfig("/tmp/ethtest", "/tmp/ethtest", "ETH")
 }
 
+// Test fork of length N starting from block i
+func testFork(t *testing.T, bman *BlockProcessor, i, N int, f func(td1, td2 *big.Int)) {
+	// switch databases to process the new chain
+	db, err := ethdb.NewMemDatabase()
+	if err != nil {
+		t.Fatal("Failed to create db:", err)
+	}
+	// copy old chain up to i into new db with deterministic canonical
+	bman2, err := newCanonical(i, db)
+	if err != nil {
+		t.Fatal("could not make new canonical in testFork", err)
+	}
+	// asert the bmans have the same block at i
+	bi1 := bman.bc.GetBlockByNumber(uint64(i)).Hash()
+	bi2 := bman2.bc.GetBlockByNumber(uint64(i)).Hash()
+	if bytes.Compare(bi1, bi2) != 0 {
+		t.Fatal("chains do not have the same hash at height", i)
+	}
+
+	bman2.bc.SetProcessor(bman2)
+
+	// extend the fork
+	parent := bman2.bc.CurrentBlock()
+	chainB := makeChain(bman2, parent, N, db, ForkSeed)
+	err = bman2.bc.InsertChain(chainB)
+	if err != nil {
+		t.Fatal("Insert chain error for fork:", err)
+	}
+
+	tdpre := bman.bc.Td()
+	// Test the fork's blocks on the original chain
+	td, err := testChain(chainB, bman)
+	if err != nil {
+		t.Fatal("expected chainB not to give errors:", err)
+	}
+	// Compare difficulties
+	f(tdpre, td)
+}
+
+func printChain(bc *ChainManager) {
+	for i := bc.CurrentBlock().Number().Uint64(); i > 0; i-- {
+		b := bc.GetBlockByNumber(uint64(i))
+		fmt.Printf("\t%x\n", b.Hash())
+	}
+}
+
+// process blocks against a chain
+func testChain(chainB types.Blocks, bman *BlockProcessor) (*big.Int, error) {
+	td := new(big.Int)
+	for _, block := range chainB {
+		td2, err := bman.bc.processor.Process(block)
+		if err != nil {
+			if IsKnownBlockErr(err) {
+				continue
+			}
+			return nil, err
+		}
+		block.Td = td2
+		td = td2
+
+		bman.bc.mu.Lock()
+		{
+			bman.bc.write(block)
+		}
+		bman.bc.mu.Unlock()
+	}
+	return td, nil
+}
+
 func loadChain(fn string, t *testing.T) (types.Blocks, error) {
 	fh, err := os.OpenFile(path.Join(os.Getenv("GOPATH"), "src", "github.com", "ethereum", "go-ethereum", "_data", fn), os.O_RDONLY, os.ModePerm)
 	if err != nil {
@@ -45,6 +115,130 @@ func insertChain(done chan bool, chainMan *ChainManager, chain types.Blocks, t *
 	done <- true
 }
 
+func TestExtendCanonical(t *testing.T) {
+	CanonicalLength := 5
+	db, err := ethdb.NewMemDatabase()
+	if err != nil {
+		t.Fatal("Failed to create db:", err)
+	}
+	// make first chain starting from genesis
+	bman, err := newCanonical(CanonicalLength, db)
+	if err != nil {
+		t.Fatal("Could not make new canonical chain:", err)
+	}
+	f := func(td1, td2 *big.Int) {
+		if td2.Cmp(td1) <= 0 {
+			t.Error("expected chainB to have higher difficulty. Got", td2, "expected more than", td1)
+		}
+	}
+	// Start fork from current height (CanonicalLength)
+	testFork(t, bman, CanonicalLength, 1, f)
+	testFork(t, bman, CanonicalLength, 2, f)
+	testFork(t, bman, CanonicalLength, 5, f)
+	testFork(t, bman, CanonicalLength, 10, f)
+}
+
+func TestShorterFork(t *testing.T) {
+	db, err := ethdb.NewMemDatabase()
+	if err != nil {
+		t.Fatal("Failed to create db:", err)
+	}
+	// make first chain starting from genesis
+	bman, err := newCanonical(10, db)
+	if err != nil {
+		t.Fatal("Could not make new canonical chain:", err)
+	}
+	f := func(td1, td2 *big.Int) {
+		if td2.Cmp(td1) >= 0 {
+			t.Error("expected chainB to have lower difficulty. Got", td2, "expected less than", td1)
+		}
+	}
+	// Sum of numbers must be less than 10
+	// for this to be a shorter fork
+	testFork(t, bman, 0, 3, f)
+	testFork(t, bman, 0, 7, f)
+	testFork(t, bman, 1, 1, f)
+	testFork(t, bman, 1, 7, f)
+	testFork(t, bman, 5, 3, f)
+	testFork(t, bman, 5, 4, f)
+}
+
+func TestLongerFork(t *testing.T) {
+	db, err := ethdb.NewMemDatabase()
+	if err != nil {
+		t.Fatal("Failed to create db:", err)
+	}
+	// make first chain starting from genesis
+	bman, err := newCanonical(10, db)
+	if err != nil {
+		t.Fatal("Could not make new canonical chain:", err)
+	}
+	f := func(td1, td2 *big.Int) {
+		if td2.Cmp(td1) <= 0 {
+			t.Error("expected chainB to have higher difficulty. Got", td2, "expected more than", td1)
+		}
+	}
+	// Sum of numbers must be greater than 10
+	// for this to be a longer fork
+	testFork(t, bman, 0, 11, f)
+	testFork(t, bman, 0, 15, f)
+	testFork(t, bman, 1, 10, f)
+	testFork(t, bman, 1, 12, f)
+	testFork(t, bman, 5, 6, f)
+	testFork(t, bman, 5, 8, f)
+}
+
+func TestEqualFork(t *testing.T) {
+	db, err := ethdb.NewMemDatabase()
+	if err != nil {
+		t.Fatal("Failed to create db:", err)
+	}
+	bman, err := newCanonical(10, db)
+	if err != nil {
+		t.Fatal("Could not make new canonical chain:", err)
+	}
+	f := func(td1, td2 *big.Int) {
+		if td2.Cmp(td1) != 0 {
+			t.Error("expected chainB to have equal difficulty. Got", td2, "expected ", td1)
+		}
+	}
+	// Sum of numbers must be equal to 10
+	// for this to be an equal fork
+	testFork(t, bman, 0, 10, f)
+	testFork(t, bman, 1, 9, f)
+	testFork(t, bman, 2, 8, f)
+	testFork(t, bman, 5, 5, f)
+	testFork(t, bman, 6, 4, f)
+	testFork(t, bman, 9, 1, f)
+}
+
+func TestBrokenChain(t *testing.T) {
+	db, err := ethdb.NewMemDatabase()
+	if err != nil {
+		t.Fatal("Failed to create db:", err)
+	}
+	bman, err := newCanonical(10, db)
+	if err != nil {
+		t.Fatal("Could not make new canonical chain:", err)
+	}
+	db2, err := ethdb.NewMemDatabase()
+	if err != nil {
+		t.Fatal("Failed to create db:", err)
+	}
+	bman2, err := newCanonical(10, db2)
+	if err != nil {
+		t.Fatal("Could not make new canonical chain:", err)
+	}
+	bman2.bc.SetProcessor(bman2)
+	parent := bman2.bc.CurrentBlock()
+	chainB := makeChain(bman2, parent, 5, db2, ForkSeed)
+	chainB = chainB[1:]
+	_, err = testChain(chainB, bman)
+	if err == nil {
+		t.Error("expected broken chain to return error")
+	}
+}
+
 func TestChainInsertions(t *testing.T) {
 	t.Skip() // travil fails.
 

core/error.go

@@ -87,6 +87,24 @@ func IsNonceErr(err error) bool {
 	return ok
 }
 
+type InvalidTxErr struct {
+	Message string
+}
+
+func (err *InvalidTxErr) Error() string {
+	return err.Message
+}
+
+func InvalidTxError(err error) *InvalidTxErr {
+	return &InvalidTxErr{fmt.Sprintf("%v", err)}
+}
+
+func IsInvalidTxErr(err error) bool {
+	_, ok := err.(*InvalidTxErr)
+
+	return ok
+}
+
 type OutOfGasErr struct {
 	Message string
 }

core/execution.go

@@ -61,10 +61,10 @@ func (self *Execution) exec(code, contextAddr []byte, caller vm.ContextRef) (ret
 	snapshot := env.State().Copy()
 	start := time.Now()
 	ret, err = evm.Run(to, caller, code, self.value, self.Gas, self.price, self.input)
+	chainlogger.Debugf("vm took %v\n", time.Since(start))
 	if err != nil {
 		env.State().Set(snapshot)
 	}
-	chainlogger.Debugf("vm took %v\n", time.Since(start))
 
 	return
 }

core/filter.go

@@ -147,7 +147,7 @@ func (self *Filter) FilterLogs(logs state.Logs) state.Logs {
 	// Filter the logs for interesting stuff
 Logs:
 	for _, log := range logs {
-		if !includes(self.address, log.Address()) {
+		if len(self.address) > 0 && !includes(self.address, log.Address()) {
 			continue
 		}
 

core/genesis.go

@@ -23,11 +23,14 @@ var EmptyShaList = crypto.Sha3(ethutil.Encode([]interface{}{}))
 var EmptyListRoot = crypto.Sha3(ethutil.Encode(""))
 
 func GenesisBlock(db ethutil.Database) *types.Block {
-	genesis := types.NewBlock(ZeroHash256, ZeroHash160, nil, big.NewInt(131072), crypto.Sha3(big.NewInt(42).Bytes()), "")
+	genesis := types.NewBlock(ZeroHash256, ZeroHash160, nil, big.NewInt(2048), 42, "")
 	genesis.Header().Number = ethutil.Big0
 	genesis.Header().GasLimit = big.NewInt(1000000)
 	genesis.Header().GasUsed = ethutil.Big0
 	genesis.Header().Time = 0
+	genesis.Header().SeedHash = make([]byte, 32)
+	genesis.Header().MixDigest = make([]byte, 32)
+
 	genesis.Td = ethutil.Big0
 
 	genesis.SetUncles([]*types.Header{})
@@ -50,11 +53,16 @@ func GenesisBlock(db ethutil.Database) *types.Block {
 	}
 	statedb.Sync()
 	genesis.Header().Root = statedb.Root()
+	fmt.Println(genesis)
 
 	return genesis
 }
 
 var genesisData = []byte(`{
+	"0000000000000000000000000000000000000001": {"balance": "1"},
+	"0000000000000000000000000000000000000002": {"balance": "1"},
+	"0000000000000000000000000000000000000003": {"balance": "1"},
+	"0000000000000000000000000000000000000004": {"balance": "1"},
 	"dbdbdb2cbd23b783741e8d7fcf51e459b497e4a6": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
 	"e4157b34ea9615cfbde6b4fda419828124b70c78": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
 	"b9c015918bdaba24b4ff057a92a3873d6eb201be": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
@@ -62,9 +70,5 @@ var genesisData = []byte(`{
 	"cd2a3d9f938e13cd947ec05abc7fe734df8dd826": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
 	"2ef47100e0787b915105fd5e3f4ff6752079d5cb": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
 	"e6716f9544a56c530d868e4bfbacb172315bdead": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
-	"1a26338f0d905e295fccb71fa9ea849ffa12aaf4": {"balance": "1606938044258990275541962092341162602522202993782792835301376"},
-	"b0afc46d9ce366d06ab4952ca27db1d9557ae9fd": {"balance": "154162184000000000000000"},
-	"f6b1e9dc460d4d62cc22ec5f987d726929c0f9f0": {"balance": "102774789000000000000000"},
-	"cc45122d8b7fa0b1eaa6b29e0fb561422a9239d0": {"balance": "51387394000000000000000"},
-	"b7576e9d314df41ec5506494293afb1bd5d3f65d": {"balance": "69423399000000000000000"}
+	"1a26338f0d905e295fccb71fa9ea849ffa12aaf4": {"balance": "1606938044258990275541962092341162602522202993782792835301376"}
 }`)

core/state_transition.go

@@ -3,7 +3,6 @@ package core
 import (
 	"fmt"
 	"math/big"
-
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethutil"
 	"github.com/ethereum/go-ethereum/state"
@@ -12,6 +11,8 @@ import (
 
 const tryJit = false
 
+var ()
+
 /*
  * The State transitioning model
  *
@@ -144,7 +145,7 @@ func (self *StateTransition) preCheck() (err error) {
 
 	// Pre-pay gas / Buy gas of the coinbase account
 	if err = self.BuyGas(); err != nil {
-		return err
+		return InvalidTxError(err)
 	}
 
 	return nil
@@ -165,22 +166,22 @@ func (self *StateTransition) TransitionState() (ret []byte, err error) {
 
 	defer self.RefundGas()
 
+	// Transaction gas
+	if err = self.UseGas(vm.GasTx); err != nil {
+		return nil, InvalidTxError(err)
+	}
+
 	// Increment the nonce for the next transaction
 	self.state.SetNonce(sender.Address(), sender.Nonce()+1)
 	//sender.Nonce += 1
 
-	// Transaction gas
-	if err = self.UseGas(vm.GasTx); err != nil {
-		return
-	}
-
 	// Pay data gas
 	var dgas int64
 	for _, byt := range self.data {
 		if byt != 0 {
-			dgas += vm.GasData.Int64()
+			dgas += vm.GasTxDataNonzeroByte.Int64()
 		} else {
-			dgas += 1 // This is 1/5. If GasData changes this fails
+			dgas += vm.GasTxDataZeroByte.Int64()
 		}
 	}
 	if err = self.UseGas(big.NewInt(dgas)); err != nil {

core/transaction_pool.go

@@ -117,8 +117,13 @@ func (self *TxPool) add(tx *types.Transaction) error {
 	} else {
 		to = "[NEW_CONTRACT]"
 	}
-
-	txplogger.Debugf("(t) %x => %s (%v) %x\n", tx.From()[:4], to, tx.Value, tx.Hash())
+	var from string
+	if len(tx.From()) > 0 {
+		from = ethutil.Bytes2Hex(tx.From()[:4])
+	} else {
+		return errors.New(fmt.Sprintf("FROM ADDRESS MUST BE POSITIVE (was %v)", tx.From()))
+	}
+	txplogger.Debugf("(t) %x => %s (%v) %x\n", from, to, tx.Value, tx.Hash())
 
 	// Notify the subscribers
 	go self.eventMux.Post(TxPreEvent{tx})

core/types/block.go

@@ -2,6 +2,7 @@ package types
 
 import (
 	"bytes"
+	"encoding/binary"
 	"fmt"
 	"math/big"
 	"sort"
@@ -39,14 +40,31 @@ type Header struct {
 	Time uint64
 	// Extra data
 	Extra string
-	// Block Nonce for verification
-	Nonce ethutil.Bytes
+	// Nonce
+	Nonce []byte
+	// Mix digest for quick checking to prevent DOS
+	MixDigest ethutil.Bytes
+	// SeedHash used for light client verification
+	SeedHash ethutil.Bytes
 }
 
 func (self *Header) rlpData(withNonce bool) []interface{} {
-	fields := []interface{}{self.ParentHash, self.UncleHash, self.Coinbase, self.Root, self.TxHash, self.ReceiptHash, self.Bloom, self.Difficulty, self.Number, self.GasLimit, self.GasUsed, self.Time, self.Extra}
+	fields := []interface{}{
+		self.ParentHash,
+		self.UncleHash,
+		self.Coinbase,
+		self.Root,
+		self.TxHash,
+		self.ReceiptHash,
+		self.Bloom,
+		self.Difficulty,
+		self.Number,
+		self.GasLimit,
+		self.GasUsed,
+		self.Time,
+		self.Extra}
 	if withNonce {
-		fields = append(fields, self.Nonce)
+		fields = append(fields, self.SeedHash, self.MixDigest, self.Nonce)
 	}
 
 	return fields
@@ -77,24 +95,29 @@ type Block struct {
 	Reward   *big.Int
 }
 
-func NewBlock(parentHash []byte, coinbase []byte, root []byte, difficulty *big.Int, nonce []byte, extra string) *Block {
+func NewBlock(parentHash []byte, coinbase []byte, root []byte, difficulty *big.Int, nonce uint64, extra string) *Block {
 	header := &Header{
 		Root:       root,
 		ParentHash: parentHash,
 		Coinbase:   coinbase,
 		Difficulty: difficulty,
-		Nonce:      nonce,
 		Time:       uint64(time.Now().Unix()),
 		Extra:      extra,
 		GasUsed:    new(big.Int),
 		GasLimit:   new(big.Int),
 	}
+	header.setNonce(nonce)
 
 	block := &Block{header: header, Reward: new(big.Int)}
 
 	return block
 }
 
+func (self *Header) setNonce(nonce uint64) {
+	self.Nonce = make([]byte, 8)
+	binary.BigEndian.PutUint64(self.Nonce, nonce)
+}
+
 func NewBlockWithHeader(header *Header) *Block {
 	return &Block{header: header}
 }
@@ -174,9 +197,17 @@ func (self *Block) RlpDataForStorage() interface{} {
 }
 
 // Header accessors (add as you need them)
-func (self *Block) Number() *big.Int          { return self.header.Number }
-func (self *Block) NumberU64() uint64         { return self.header.Number.Uint64() }
-func (self *Block) Nonce() []byte             { return self.header.Nonce }
+func (self *Block) Number() *big.Int  { return self.header.Number }
+func (self *Block) NumberU64() uint64 { return self.header.Number.Uint64() }
+func (self *Block) MixDigest() []byte { return self.header.MixDigest }
+func (self *Block) SeedHash() []byte  { return self.header.SeedHash }
+func (self *Block) Nonce() uint64 {
+	return binary.BigEndian.Uint64(self.header.Nonce)
+}
+func (self *Block) SetNonce(nonce uint64) {
+	self.header.setNonce(nonce)
+}
+
 func (self *Block) Bloom() []byte             { return self.header.Bloom }
 func (self *Block) Coinbase() []byte          { return self.header.Coinbase }
 func (self *Block) Time() int64               { return int64(self.header.Time) }
@@ -200,7 +231,6 @@ func (self *Block) GetUncle(i int) *Header {
 
 // Implement pow.Block
 func (self *Block) Difficulty() *big.Int { return self.header.Difficulty }
-func (self *Block) N() []byte            { return self.header.Nonce }
 func (self *Block) HashNoNonce() []byte  { return self.header.HashNoNonce() }
 
 func (self *Block) Hash() []byte {
@@ -249,8 +279,10 @@ func (self *Header) String() string {
 	GasUsed:	    %v
 	Time:		    %v
 	Extra:		    %v
-	Nonce:		    %x
-`, self.ParentHash, self.UncleHash, self.Coinbase, self.Root, self.TxHash, self.ReceiptHash, self.Bloom, self.Difficulty, self.Number, self.GasLimit, self.GasUsed, self.Time, self.Extra, self.Nonce)
+	SeedHash:           %x
+	MixDigest:          %x
+	Nonce:		    %x`,
+		self.ParentHash, self.UncleHash, self.Coinbase, self.Root, self.TxHash, self.ReceiptHash, self.Bloom, self.Difficulty, self.Number, self.GasLimit, self.GasUsed, self.Time, self.Extra, self.SeedHash, self.MixDigest, self.Nonce)
 }
 
 type Blocks []*Block

core/types/bloom9.go

@@ -14,7 +14,7 @@ func CreateBloom(receipts Receipts) []byte {
 		bin.Or(bin, LogsBloom(receipt.logs))
 	}
 
-	return ethutil.LeftPadBytes(bin.Bytes(), 64)
+	return ethutil.LeftPadBytes(bin.Bytes(), 256)
 }
 
 func LogsBloom(logs state.Logs) *big.Int {
@@ -37,9 +37,10 @@ func LogsBloom(logs state.Logs) *big.Int {
 
 func bloom9(b []byte) *big.Int {
 	r := new(big.Int)
-	for _, i := range []int{0, 2, 4} {
+
+	for i := 0; i < 16; i += 2 {
 		t := big.NewInt(1)
-		b := uint(b[i+1]) + 256*(uint(b[i])&1)
+		b := uint(b[i+1]) + 1024*(uint(b[i])&1)
 		r.Or(r, t.Lsh(t, b))
 	}
 

errs/errors.go

@@ -0,0 +1,91 @@
+package errs
+
+import (
+	"fmt"
+
+	"github.com/ethereum/go-ethereum/logger"
+)
+
+/*
+Errors implements an error handler providing standardised errors for a package.
+Fields:
+
+ Errors:
+  a map from error codes to description
+
+ Package:
+  name of the package/component
+
+ Level:
+  a function mapping error code to logger.LogLevel (severity)
+  if not given, errors default to logger.InfoLevel
+*/
+type Errors struct {
+	Errors  map[int]string
+	Package string
+	Level   func(code int) logger.LogLevel
+}
+
+/*
+Error implements the standard go error interface.
+
+  errors.New(code, format, params ...interface{})
+
+Prints as:
+
+ [package] description: details
+
+where details is fmt.Sprintf(self.format, self.params...)
+*/
+type Error struct {
+	Code    int
+	Name    string
+	Package string
+	level   logger.LogLevel
+	message string
+	format  string
+	params  []interface{}
+}
+
+func (self *Errors) New(code int, format string, params ...interface{}) *Error {
+	name, ok := self.Errors[code]
+	if !ok {
+		panic("invalid error code")
+	}
+	level := logger.InfoLevel
+	if self.Level != nil {
+		level = self.Level(code)
+	}
+	return &Error{
+		Code:    code,
+		Name:    name,
+		Package: self.Package,
+		level:   level,
+		format:  format,
+		params:  params,
+	}
+}
+
+func (self Error) Error() (message string) {
+	if len(message) == 0 {
+		self.message = fmt.Sprintf("[%s] %s", self.Package, self.Name)
+		if self.format != "" {
+			self.message += ": " + fmt.Sprintf(self.format, self.params...)
+		}
+	}
+	return self.message
+}
+
+func (self Error) Log(log *logger.Logger) {
+	log.Sendln(self.level, self)
+}
+
+/*
+err.Fatal() is true if err's severity level is 0 or 1 (logger.ErrorLevel or logger.Silence)
+*/
+func (self *Error) Fatal() (fatal bool) {
+	if self.level < logger.WarnLevel {
+		fatal = true
+	}
+	return
+}

errs/errors_test.go

@@ -0,0 +1,46 @@
+package errs
+
+import (
+	"fmt"
+	"testing"
+
+	"github.com/ethereum/go-ethereum/logger"
+)
+
+func testErrors() *Errors {
+	return &Errors{
+		Package: "TEST",
+		Errors: map[int]string{
+			0: "zero",
+			1: "one",
+		},
+		Level: func(i int) (l logger.LogLevel) {
+			if i == 0 {
+				l = logger.ErrorLevel
+			} else {
+				l = logger.WarnLevel
+			}
+			return
+		},
+	}
+}
+
+func TestErrorMessage(t *testing.T) {
+	err := testErrors().New(0, "zero detail %v", "available")
+	message := fmt.Sprintf("%v", err)
+	exp := "[TEST] zero: zero detail available"
+	if message != exp {
+		t.Errorf("error message incorrect. expected %v, got %v", exp, message)
+	}
+}
+
+func TestErrorSeverity(t *testing.T) {
+	err0 := testErrors().New(0, "zero detail")
+	if !err0.Fatal() {
+		t.Errorf("error should be fatal")
+	}
+	err1 := testErrors().New(1, "one detail")
+	if err1.Fatal() {
+		t.Errorf("error should not be fatal")
+	}
+}

eth/backend.go

@@ -7,6 +7,8 @@ import (
 	"path"
 	"strings"
 
+	"github.com/ethereum/ethash"
+	"github.com/ethereum/go-ethereum/blockpool"
 	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethdb"
@@ -117,7 +119,7 @@ type Ethereum struct {
 	blockProcessor *core.BlockProcessor
 	txPool         *core.TxPool
 	chainManager   *core.ChainManager
-	blockPool      *BlockPool
+	blockPool      *blockpool.BlockPool
 	whisper        *whisper.Whisper
 
 	net      *p2p.Server
@@ -177,15 +179,17 @@ func New(config *Config) (*Ethereum, error) {
 	}
 
 	eth.chainManager = core.NewChainManager(db, eth.EventMux())
+	pow := ethash.New(eth.chainManager)
+
 	eth.txPool = core.NewTxPool(eth.EventMux())
-	eth.blockProcessor = core.NewBlockProcessor(db, eth.txPool, eth.chainManager, eth.EventMux())
+	eth.blockProcessor = core.NewBlockProcessor(db, pow, eth.txPool, eth.chainManager, eth.EventMux())
 	eth.chainManager.SetProcessor(eth.blockProcessor)
 	eth.whisper = whisper.New()
-	eth.miner = miner.New(keyManager.Address(), eth, config.MinerThreads)
+	eth.miner = miner.New(keyManager.Address(), eth, pow, config.MinerThreads)
 
 	hasBlock := eth.chainManager.HasBlock
 	insertChain := eth.chainManager.InsertChain
-	eth.blockPool = NewBlockPool(hasBlock, insertChain, ezp.Verify)
+	eth.blockPool = blockpool.New(hasBlock, insertChain, ezp.Verify)
 
 	netprv, err := config.nodeKey()
 	if err != nil {
@@ -220,7 +224,7 @@ func (s *Ethereum) Name() string                         { return s.net.Name }
 func (s *Ethereum) ChainManager() *core.ChainManager     { return s.chainManager }
 func (s *Ethereum) BlockProcessor() *core.BlockProcessor { return s.blockProcessor }
 func (s *Ethereum) TxPool() *core.TxPool                 { return s.txPool }
-func (s *Ethereum) BlockPool() *BlockPool                { return s.blockPool }
+func (s *Ethereum) BlockPool() *blockpool.BlockPool      { return s.blockPool }
 func (s *Ethereum) Whisper() *whisper.Whisper            { return s.whisper }
 func (s *Ethereum) EventMux() *event.TypeMux             { return s.eventMux }
 func (s *Ethereum) Db() ethutil.Database                 { return s.db }

eth/block_pool_test.go

@@ -1,983 +0,0 @@
-package eth
-
-import (
-	"fmt"
-	"log"
-	"math/big"
-	"os"
-	"sync"
-	"testing"
-	"time"
-
-	"github.com/ethereum/go-ethereum/core/types"
-	"github.com/ethereum/go-ethereum/crypto"
-	"github.com/ethereum/go-ethereum/ethutil"
-	"github.com/ethereum/go-ethereum/logger"
-	"github.com/ethereum/go-ethereum/pow"
-)
-
-const waitTimeout = 60 // seconds
-
-var logsys = logger.NewStdLogSystem(os.Stdout, log.LstdFlags, logger.LogLevel(logger.DebugDetailLevel))
-
-var ini = false
-
-func logInit() {
-	if !ini {
-		logger.AddLogSystem(logsys)
-		ini = true
-	}
-}
-
-// test helpers
-func arrayEq(a, b []int) bool {
-	if len(a) != len(b) {
-		return false
-	}
-	for i := range a {
-		if a[i] != b[i] {
-			return false
-		}
-	}
-	return true
-}
-
-type intToHash map[int][]byte
-
-type hashToInt map[string]int
-
-// hashPool is a test helper, that allows random hashes to be referred to by integers
-type testHashPool struct {
-	intToHash
-	hashToInt
-	lock sync.Mutex
-}
-
-func newHash(i int) []byte {
-	return crypto.Sha3([]byte(string(i)))
-}
-
-func (self *testHashPool) indexesToHashes(indexes []int) (hashes [][]byte) {
-	self.lock.Lock()
-	defer self.lock.Unlock()
-	for _, i := range indexes {
-		hash, found := self.intToHash[i]
-		if !found {
-			hash = newHash(i)
-			self.intToHash[i] = hash
-			self.hashToInt[string(hash)] = i
-		}
-		hashes = append(hashes, hash)
-	}
-	return
-}
-
-func (self *testHashPool) hashesToIndexes(hashes [][]byte) (indexes []int) {
-	self.lock.Lock()
-	defer self.lock.Unlock()
-	for _, hash := range hashes {
-		i, found := self.hashToInt[string(hash)]
-		if !found {
-			i = -1
-		}
-		indexes = append(indexes, i)
-	}
-	return
-}
-
-// test blockChain is an integer trie
-type blockChain map[int][]int
-
-// blockPoolTester provides the interface between tests and a blockPool
-//
-// refBlockChain is used to guide which blocks will be accepted as valid
-// blockChain gives the current state of the blockchain and
-// accumulates inserts so that we can check the resulting chain
-type blockPoolTester struct {
-	hashPool      *testHashPool
-	lock          sync.RWMutex
-	refBlockChain blockChain
-	blockChain    blockChain
-	blockPool     *BlockPool
-	t             *testing.T
-}
-
-func newTestBlockPool(t *testing.T) (hashPool *testHashPool, blockPool *BlockPool, b *blockPoolTester) {
-	hashPool = &testHashPool{intToHash: make(intToHash), hashToInt: make(hashToInt)}
-	b = &blockPoolTester{
-		t:             t,
-		hashPool:      hashPool,
-		blockChain:    make(blockChain),
-		refBlockChain: make(blockChain),
-	}
-	b.blockPool = NewBlockPool(b.hasBlock, b.insertChain, b.verifyPoW)
-	blockPool = b.blockPool
-	return
-}
-
-func (self *blockPoolTester) Errorf(format string, params ...interface{}) {
-	fmt.Printf(format+"\n", params...)
-	self.t.Errorf(format, params...)
-}
-
-// blockPoolTester implements the 3 callbacks needed by the blockPool:
-// hasBlock, insetChain, verifyPoW
-func (self *blockPoolTester) hasBlock(block []byte) (ok bool) {
-	self.lock.RLock()
-	defer self.lock.RUnlock()
-	indexes := self.hashPool.hashesToIndexes([][]byte{block})
-	i := indexes[0]
-	_, ok = self.blockChain[i]
-	fmt.Printf("has block %v (%x...): %v\n", i, block[0:4], ok)
-	return
-}
-
-func (self *blockPoolTester) insertChain(blocks types.Blocks) error {
-	self.lock.RLock()
-	defer self.lock.RUnlock()
-	var parent, child int
-	var children, refChildren []int
-	var ok bool
-	for _, block := range blocks {
-		child = self.hashPool.hashesToIndexes([][]byte{block.Hash()})[0]
-		_, ok = self.blockChain[child]
-		if ok {
-			fmt.Printf("block %v already in blockchain\n", child)
-			continue // already in chain
-		}
-		parent = self.hashPool.hashesToIndexes([][]byte{block.ParentHeaderHash})[0]
-		children, ok = self.blockChain[parent]
-		if !ok {
-			return fmt.Errorf("parent %v not in blockchain ", parent)
-		}
-		ok = false
-		var found bool
-		refChildren, found = self.refBlockChain[parent]
-		if found {
-			for _, c := range refChildren {
-				if c == child {
-					ok = true
-				}
-			}
-			if !ok {
-				return fmt.Errorf("invalid block %v", child)
-			}
-		} else {
-			ok = true
-		}
-		if ok {
-			// accept any blocks if parent not in refBlockChain
-			fmt.Errorf("blockchain insert %v -> %v\n", parent, child)
-			self.blockChain[parent] = append(children, child)
-			self.blockChain[child] = nil
-		}
-	}
-	return nil
-}
-
-func (self *blockPoolTester) verifyPoW(pblock pow.Block) bool {
-	return true
-}
-
-// test helper that compares the resulting blockChain to the desired blockChain
-func (self *blockPoolTester) checkBlockChain(blockChain map[int][]int) {
-	for k, v := range self.blockChain {
-		fmt.Printf("got: %v -> %v\n", k, v)
-	}
-	for k, v := range blockChain {
-		fmt.Printf("expected: %v -> %v\n", k, v)
-	}
-	if len(blockChain) != len(self.blockChain) {
-		self.Errorf("blockchain incorrect (zlength differ)")
-	}
-	for k, v := range blockChain {
-		vv, ok := self.blockChain[k]
-		if !ok || !arrayEq(v, vv) {
-			self.Errorf("blockchain incorrect on %v -> %v (!= %v)", k, vv, v)
-		}
-	}
-}
-
-//
-
-// peerTester provides the peer callbacks for the blockPool
-// it registers actual callbacks so that result can be compared to desired behaviour
-// provides helper functions to mock the protocol calls to the blockPool
-type peerTester struct {
-	blockHashesRequests []int
-	blocksRequests      [][]int
-	blocksRequestsMap   map[int]bool
-	peerErrors          []int
-	blockPool           *BlockPool
-	hashPool            *testHashPool
-	lock                sync.RWMutex
-	id                  string
-	td                  int
-	currentBlock        int
-	t                   *testing.T
-}
-
-// peerTester constructor takes hashPool and blockPool from the blockPoolTester
-func (self *blockPoolTester) newPeer(id string, td int, cb int) *peerTester {
-	return &peerTester{
-		id:                id,
-		td:                td,
-		currentBlock:      cb,
-		hashPool:          self.hashPool,
-		blockPool:         self.blockPool,
-		t:                 self.t,
-		blocksRequestsMap: make(map[int]bool),
-	}
-}
-
-func (self *peerTester) Errorf(format string, params ...interface{}) {
-	fmt.Printf(format+"\n", params...)
-	self.t.Errorf(format, params...)
-}
-
-// helper to compare actual and expected block requests
-func (self *peerTester) checkBlocksRequests(blocksRequests ...[]int) {
-	if len(blocksRequests) > len(self.blocksRequests) {
-		self.Errorf("blocks requests incorrect (length differ)\ngot %v\nexpected %v", self.blocksRequests, blocksRequests)
-	} else {
-		for i, rr := range blocksRequests {
-			r := self.blocksRequests[i]
-			if !arrayEq(r, rr) {
-				self.Errorf("blocks requests incorrect\ngot %v\nexpected %v", self.blocksRequests, blocksRequests)
-			}
-		}
-	}
-}
-
-// helper to compare actual and expected block hash requests
-func (self *peerTester) checkBlockHashesRequests(blocksHashesRequests ...int) {
-	rr := blocksHashesRequests
-	self.lock.RLock()
-	r := self.blockHashesRequests
-	self.lock.RUnlock()
-	if len(r) != len(rr) {
-		self.Errorf("block hashes requests incorrect (length differ)\ngot %v\nexpected %v", r, rr)
-	} else {
-		if !arrayEq(r, rr) {
-			self.Errorf("block hashes requests incorrect\ngot %v\nexpected %v", r, rr)
-		}
-	}
-}
-
-// waiter function used by peer.AddBlocks
-// blocking until requests appear
-// since block requests are sent to any random peers
-// block request map is shared between peers
-// times out after a period
-func (self *peerTester) waitBlocksRequests(blocksRequest ...int) {
-	timeout := time.After(waitTimeout * time.Second)
-	rr := blocksRequest
-	for {
-		self.lock.RLock()
-		r := self.blocksRequestsMap
-		fmt.Printf("[%s] blocks request check %v (%v)\n", self.id, rr, r)
-		i := 0
-		for i = 0; i < len(rr); i++ {
-			_, ok := r[rr[i]]
-			if !ok {
-				break
-			}
-		}
-		self.lock.RUnlock()
-
-		if i == len(rr) {
-			return
-		}
-		time.Sleep(100 * time.Millisecond)
-		select {
-		case <-timeout:
-		default:
-		}
-	}
-}
-
-// waiter function used by peer.AddBlockHashes
-// blocking until requests appear
-// times out after a period
-func (self *peerTester) waitBlockHashesRequests(blocksHashesRequest int) {
-	timeout := time.After(waitTimeout * time.Second)
-	rr := blocksHashesRequest
-	for i := 0; ; {
-		self.lock.RLock()
-		r := self.blockHashesRequests
-		self.lock.RUnlock()
-		fmt.Printf("[%s] block hash request check %v (%v)\n", self.id, rr, r)
-		for ; i < len(r); i++ {
-			if rr == r[i] {
-				return
-			}
-		}
-		time.Sleep(100 * time.Millisecond)
-		select {
-		case <-timeout:
-		default:
-		}
-	}
-}
-
-// mocks a simple blockchain 0 (genesis) ... n (head)
-func (self *blockPoolTester) initRefBlockChain(n int) {
-	for i := 0; i < n; i++ {
-		self.refBlockChain[i] = []int{i + 1}
-	}
-}
-
-// peerTester functions that mimic protocol calls to the blockpool
-//  registers the peer with the blockPool
-func (self *peerTester) AddPeer() bool {
-	hash := self.hashPool.indexesToHashes([]int{self.currentBlock})[0]
-	return self.blockPool.AddPeer(big.NewInt(int64(self.td)), hash, self.id, self.requestBlockHashes, self.requestBlocks, self.peerError)
-}
-
-// peer sends blockhashes if and when gets a request
-func (self *peerTester) AddBlockHashes(indexes ...int) {
-	fmt.Printf("ready to add block hashes %v\n", indexes)
-
-	self.waitBlockHashesRequests(indexes[0])
-	fmt.Printf("adding block hashes %v\n", indexes)
-	hashes := self.hashPool.indexesToHashes(indexes)
-	i := 1
-	next := func() (hash []byte, ok bool) {
-		if i < len(hashes) {
-			hash = hashes[i]
-			ok = true
-			i++
-		}
-		return
-	}
-	self.blockPool.AddBlockHashes(next, self.id)
-}
-
-// peer sends blocks if and when there is a request
-// (in the shared request store, not necessarily to a person)
-func (self *peerTester) AddBlocks(indexes ...int) {
-	hashes := self.hashPool.indexesToHashes(indexes)
-	fmt.Printf("ready to add blocks %v\n", indexes[1:])
-	self.waitBlocksRequests(indexes[1:]...)
-	fmt.Printf("adding blocks %v \n", indexes[1:])
-	for i := 1; i < len(hashes); i++ {
-		fmt.Printf("adding block %v %x\n", indexes[i], hashes[i][:4])
-		self.blockPool.AddBlock(&types.Block{HeaderHash: ethutil.Bytes(hashes[i]), ParentHeaderHash: ethutil.Bytes(hashes[i-1])}, self.id)
-	}
-}
-
-// peer callbacks
-// -1 is special: not found (a hash never seen)
-// records block hashes requests by the blockPool
-func (self *peerTester) requestBlockHashes(hash []byte) error {
-	indexes := self.hashPool.hashesToIndexes([][]byte{hash})
-	fmt.Printf("[%s] blocks hash request %v %x\n", self.id, indexes[0], hash[:4])
-	self.lock.Lock()
-	defer self.lock.Unlock()
-	self.blockHashesRequests = append(self.blockHashesRequests, indexes[0])
-	return nil
-}
-
-// records block requests by the blockPool
-func (self *peerTester) requestBlocks(hashes [][]byte) error {
-	indexes := self.hashPool.hashesToIndexes(hashes)
-	fmt.Printf("blocks request %v %x...\n", indexes, hashes[0][:4])
-	self.lock.Lock()
-	defer self.lock.Unlock()
-	self.blocksRequests = append(self.blocksRequests, indexes)
-	for _, i := range indexes {
-		self.blocksRequestsMap[i] = true
-	}
-	return nil
-}
-
-// records the error codes of all the peerErrors found the blockPool
-func (self *peerTester) peerError(code int, format string, params ...interface{}) {
-	self.peerErrors = append(self.peerErrors, code)
-}
-
-// the actual tests
-func TestAddPeer(t *testing.T) {
-	logInit()
-	_, blockPool, blockPoolTester := newTestBlockPool(t)
-	peer0 := blockPoolTester.newPeer("peer0", 1, 0)
-	peer1 := blockPoolTester.newPeer("peer1", 2, 1)
-	peer2 := blockPoolTester.newPeer("peer2", 3, 2)
-	var peer *peerInfo
-
-	blockPool.Start()
-
-	// pool
-	best := peer0.AddPeer()
-	if !best {
-		t.Errorf("peer0 (TD=1) not accepted as best")
-	}
-	if blockPool.peer.id != "peer0" {
-		t.Errorf("peer0 (TD=1) not set as best")
-	}
-	// peer0.checkBlockHashesRequests(0)
-
-	best = peer2.AddPeer()
-	if !best {
-		t.Errorf("peer2 (TD=3) not accepted as best")
-	}
-	if blockPool.peer.id != "peer2" {
-		t.Errorf("peer2 (TD=3) not set as best")
-	}
-	peer2.waitBlocksRequests(2)
-
-	best = peer1.AddPeer()
-	if best {
-		t.Errorf("peer1 (TD=2) accepted as best")
-	}
-	if blockPool.peer.id != "peer2" {
-		t.Errorf("peer2 (TD=3) not set any more as best")
-	}
-	if blockPool.peer.td.Cmp(big.NewInt(int64(3))) != 0 {
-		t.Errorf("peer1 TD not set")
-	}
-
-	peer2.td = 4
-	peer2.currentBlock = 3
-	best = peer2.AddPeer()
-	if !best {
-		t.Errorf("peer2 (TD=4) not accepted as best")
-	}
-	if blockPool.peer.id != "peer2" {
-		t.Errorf("peer2 (TD=4) not set as best")
-	}
-	if blockPool.peer.td.Cmp(big.NewInt(int64(4))) != 0 {
-		t.Errorf("peer2 TD not updated")
-	}
-	peer2.waitBlocksRequests(3)
-
-	peer1.td = 3
-	peer1.currentBlock = 2
-	best = peer1.AddPeer()
-	if best {
-		t.Errorf("peer1 (TD=3) should not be set as best")
-	}
-	if blockPool.peer.id == "peer1" {
-		t.Errorf("peer1 (TD=3) should not be set as best")
-	}
-	peer, best = blockPool.getPeer("peer1")
-	if peer.td.Cmp(big.NewInt(int64(3))) != 0 {
-		t.Errorf("peer1 TD should be updated")
-	}
-
-	blockPool.RemovePeer("peer2")
-	peer, best = blockPool.getPeer("peer2")
-	if peer != nil {
-		t.Errorf("peer2 not removed")
-	}
-
-	if blockPool.peer.id != "peer1" {
-		t.Errorf("existing peer1 (TD=3) should be set as best peer")
-	}
-	peer1.waitBlocksRequests(2)
-
-	blockPool.RemovePeer("peer1")
-	peer, best = blockPool.getPeer("peer1")
-	if peer != nil {
-		t.Errorf("peer1 not removed")
-	}
-
-	if blockPool.peer.id != "peer0" {
-		t.Errorf("existing peer0 (TD=1) should be set as best peer")
-	}
-	peer0.waitBlocksRequests(0)
-
-	blockPool.RemovePeer("peer0")
-	peer, best = blockPool.getPeer("peer0")
-	if peer != nil {
-		t.Errorf("peer1 not removed")
-	}
-
-	// adding back earlier peer ok
-	peer0.currentBlock = 3
-	best = peer0.AddPeer()
-	if !best {
-		t.Errorf("peer0 (TD=1) should be set as best")
-	}
-
-	if blockPool.peer.id != "peer0" {
-		t.Errorf("peer0 (TD=1) should be set as best")
-	}
-	peer0.waitBlocksRequests(3)
-
-	blockPool.Stop()
-
-}
-
-func TestPeerWithKnownBlock(t *testing.T) {
-	logInit()
-	_, blockPool, blockPoolTester := newTestBlockPool(t)
-	blockPoolTester.refBlockChain[0] = nil
-	blockPoolTester.blockChain[0] = nil
-	blockPool.Start()
-
-	peer0 := blockPoolTester.newPeer("0", 1, 0)
-	peer0.AddPeer()
-
-	blockPool.Wait(waitTimeout * time.Second)
-	blockPool.Stop()
-	// no request on known block
-	peer0.checkBlockHashesRequests()
-}
-
-func TestPeerWithKnownParentBlock(t *testing.T) {
-	logInit()
-	_, blockPool, blockPoolTester := newTestBlockPool(t)
-	blockPoolTester.initRefBlockChain(1)
-	blockPoolTester.blockChain[0] = nil
-	blockPool.Start()
-
-	peer0 := blockPoolTester.newPeer("0", 1, 1)
-	peer0.AddPeer()
-	peer0.AddBlocks(0, 1)
-
-	blockPool.Wait(waitTimeout * time.Second)
-	blockPool.Stop()
-	peer0.checkBlocksRequests([]int{1})
-	peer0.checkBlockHashesRequests()
-	blockPoolTester.refBlockChain[1] = []int{}
-	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
-}
-
-func TestSimpleChain(t *testing.T) {
-	logInit()
-	_, blockPool, blockPoolTester := newTestBlockPool(t)
-	blockPoolTester.blockChain[0] = nil
-	blockPoolTester.initRefBlockChain(2)
-
-	blockPool.Start()
-
-	peer1 := blockPoolTester.newPeer("peer1", 1, 2)
-	peer1.AddPeer()
-	peer1.AddBlocks(1, 2)
-	go peer1.AddBlockHashes(2, 1, 0)
-	peer1.AddBlocks(0, 1)
-
-	blockPool.Wait(waitTimeout * time.Second)
-	blockPool.Stop()
-	blockPoolTester.refBlockChain[2] = []int{}
-	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
-}
-
-func TestChainConnectingWithParentHash(t *testing.T) {
-	logInit()
-	_, blockPool, blockPoolTester := newTestBlockPool(t)
-	blockPoolTester.blockChain[0] = nil
-	blockPoolTester.initRefBlockChain(3)
-
-	blockPool.Start()
-
-	peer1 := blockPoolTester.newPeer("peer1", 1, 3)
-	peer1.AddPeer()
-	go peer1.AddBlocks(2, 3)
-	go peer1.AddBlockHashes(3, 2, 1)
-	peer1.AddBlocks(0, 1, 2)
-
-	blockPool.Wait(waitTimeout * time.Second)
-	blockPool.Stop()
-	blockPoolTester.refBlockChain[3] = []int{}
-	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
-}
-
-func TestInvalidBlock(t *testing.T) {
-	logInit()
-	_, blockPool, blockPoolTester := newTestBlockPool(t)
-	blockPoolTester.blockChain[0] = nil
-	blockPoolTester.initRefBlockChain(2)
-	blockPoolTester.refBlockChain[2] = []int{}
-
-	blockPool.Start()
-
-	peer1 := blockPoolTester.newPeer("peer1", 1, 3)
-	peer1.AddPeer()
-	go peer1.AddBlocks(2, 3)
-	go peer1.AddBlockHashes(3, 2, 1, 0)
-	peer1.AddBlocks(0, 1, 2)
-
-	blockPool.Wait(waitTimeout * time.Second)
-	blockPool.Stop()
-	blockPoolTester.refBlockChain[2] = []int{}
-	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
-	if len(peer1.peerErrors) == 1 {
-		if peer1.peerErrors[0] != ErrInvalidBlock {
-			t.Errorf("wrong error, got %v, expected %v", peer1.peerErrors[0], ErrInvalidBlock)
-		}
-	} else {
-		t.Errorf("expected invalid block error, got nothing %v", peer1.peerErrors)
-	}
-}
-
-func TestVerifyPoW(t *testing.T) {
-	t.Skip("***FIX*** This test is broken")
-	logInit()
-	_, blockPool, blockPoolTester := newTestBlockPool(t)
-	blockPoolTester.blockChain[0] = nil
-	blockPoolTester.initRefBlockChain(3)
-	first := false
-	blockPoolTester.blockPool.verifyPoW = func(b pow.Block) bool {
-		bb, _ := b.(*types.Block)
-		indexes := blockPoolTester.hashPool.hashesToIndexes([][]byte{bb.Hash()})
-		if indexes[0] == 2 && !first {
-			first = true
-			return false
-		} else {
-			return true
-		}
-
-	}
-
-	blockPool.Start()
-
-	peer1 := blockPoolTester.newPeer("peer1", 1, 3)
-	peer1.AddPeer()
-	go peer1.AddBlocks(2, 3)
-	go peer1.AddBlockHashes(3, 2, 1, 0)
-	peer1.AddBlocks(0, 1, 2)
-
-	// blockPool.Wait(waitTimeout * time.Second)
-	time.Sleep(1 * time.Second)
-	blockPool.Stop()
-	blockPoolTester.refBlockChain[1] = []int{}
-	delete(blockPoolTester.refBlockChain, 2)
-	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
-	if len(peer1.peerErrors) == 1 {
-		if peer1.peerErrors[0] != ErrInvalidPoW {
-			t.Errorf("wrong error, got %v, expected %v", peer1.peerErrors[0], ErrInvalidPoW)
-		}
-	} else {
-		t.Errorf("expected invalid pow error, got nothing")
-	}
-}
-
-func TestMultiSectionChain(t *testing.T) {
-	logInit()
-	_, blockPool, blockPoolTester := newTestBlockPool(t)
-	blockPoolTester.blockChain[0] = nil
-	blockPoolTester.initRefBlockChain(5)
-
-	blockPool.Start()
-
-	peer1 := blockPoolTester.newPeer("peer1", 1, 5)
-
-	peer1.AddPeer()
-	go peer1.AddBlocks(4, 5)
-	go peer1.AddBlockHashes(5, 4, 3)
-	go peer1.AddBlocks(2, 3, 4)
-	go peer1.AddBlockHashes(3, 2, 1, 0)
-	peer1.AddBlocks(0, 1, 2)
-
-	blockPool.Wait(waitTimeout * time.Second)
-	blockPool.Stop()
-	blockPoolTester.refBlockChain[5] = []int{}
-	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
-}
-
-func TestNewBlocksOnPartialChain(t *testing.T) {
-	logInit()
-	_, blockPool, blockPoolTester := newTestBlockPool(t)
-	blockPoolTester.blockChain[0] = nil
-	blockPoolTester.initRefBlockChain(7)
-	blockPool.Start()
-
-	peer1 := blockPoolTester.newPeer("peer1", 1, 5)
-
-	peer1.AddPeer()
-	go peer1.AddBlocks(4, 5) // partially complete section
-	go peer1.AddBlockHashes(5, 4, 3)
-	peer1.AddBlocks(3, 4) // partially complete section
-	// peer1 found new blocks
-	peer1.td = 2
-	peer1.currentBlock = 7
-	peer1.AddPeer()
-	go peer1.AddBlocks(6, 7)
-	go peer1.AddBlockHashes(7, 6, 5)
-	go peer1.AddBlocks(2, 3)
-	go peer1.AddBlocks(5, 6)
-	go peer1.AddBlockHashes(3, 2, 1, 0) // tests that hash request from known chain root is remembered
-	peer1.AddBlocks(0, 1, 2)
-
-	blockPool.Wait(waitTimeout * time.Second)
-	blockPool.Stop()
-	blockPoolTester.refBlockChain[7] = []int{}
-	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
-}
-
-func TestPeerSwitchUp(t *testing.T) {
-	logInit()
-	_, blockPool, blockPoolTester := newTestBlockPool(t)
-	blockPoolTester.blockChain[0] = nil
-	blockPoolTester.initRefBlockChain(7)
-
-	blockPool.Start()
-
-	peer1 := blockPoolTester.newPeer("peer1", 1, 6)
-	peer2 := blockPoolTester.newPeer("peer2", 2, 7)
-	peer2.blocksRequestsMap = peer1.blocksRequestsMap
-
-	peer1.AddPeer()
-	go peer1.AddBlocks(5, 6)
-	go peer1.AddBlockHashes(6, 5, 4, 3) //
-	peer1.AddBlocks(2, 3)               // section partially complete, block 3 will be preserved after peer demoted
-	peer2.AddPeer()                     // peer2 is promoted as best peer, peer1 is demoted
-	go peer2.AddBlocks(6, 7)
-	go peer2.AddBlockHashes(7, 6)       //
-	go peer2.AddBlocks(4, 5)            // tests that block request for earlier section is remembered
-	go peer1.AddBlocks(3, 4)            // tests that connecting section by demoted peer is remembered and blocks are accepted from demoted peer
-	go peer2.AddBlockHashes(3, 2, 1, 0) // tests that known chain section is activated, hash requests from 3 is remembered
-	peer2.AddBlocks(0, 1, 2)            // final blocks linking to blockchain sent
-
-	blockPool.Wait(waitTimeout * time.Second)
-	blockPool.Stop()
-	blockPoolTester.refBlockChain[7] = []int{}
-	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
-}
-
-func TestPeerSwitchDown(t *testing.T) {
-	logInit()
-	_, blockPool, blockPoolTester := newTestBlockPool(t)
-	blockPoolTester.blockChain[0] = nil
-	blockPoolTester.initRefBlockChain(6)
-	blockPool.Start()
-
-	peer1 := blockPoolTester.newPeer("peer1", 1, 4)
-	peer2 := blockPoolTester.newPeer("peer2", 2, 6)
-	peer2.blocksRequestsMap = peer1.blocksRequestsMap
-
-	peer2.AddPeer()
-	peer2.AddBlocks(5, 6)                  // partially complete, section will be preserved
-	go peer2.AddBlockHashes(6, 5, 4)       //
-	peer2.AddBlocks(4, 5)                  //
-	blockPool.RemovePeer("peer2")          // peer2 disconnects
-	peer1.AddPeer()                        // inferior peer1 is promoted as best peer
-	go peer1.AddBlockHashes(4, 3, 2, 1, 0) //
-	go peer1.AddBlocks(3, 4)               // tests that section set by demoted peer is remembered and blocks are accepted , this connects the chain sections together
-	peer1.AddBlocks(0, 1, 2, 3)
-
-	blockPool.Wait(waitTimeout * time.Second)
-	blockPool.Stop()
-	blockPoolTester.refBlockChain[6] = []int{}
-	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
-}
-
-func TestPeerCompleteSectionSwitchDown(t *testing.T) {
-	logInit()
-	_, blockPool, blockPoolTester := newTestBlockPool(t)
-	blockPoolTester.blockChain[0] = nil
-	blockPoolTester.initRefBlockChain(6)
-	blockPool.Start()
-
-	peer1 := blockPoolTester.newPeer("peer1", 1, 4)
-	peer2 := blockPoolTester.newPeer("peer2", 2, 6)
-	peer2.blocksRequestsMap = peer1.blocksRequestsMap
-
-	peer2.AddPeer()
-	peer2.AddBlocks(5, 6)               // partially complete, section will be preserved
-	go peer2.AddBlockHashes(6, 5, 4)    //
-	peer2.AddBlocks(3, 4, 5)            // complete section
-	blockPool.RemovePeer("peer2")       // peer2 disconnects
-	peer1.AddPeer()                     // inferior peer1 is promoted as best peer
-	peer1.AddBlockHashes(4, 3, 2, 1, 0) // tests that hash request are directly connecting if the head block exists
-	peer1.AddBlocks(0, 1, 2, 3)
-
-	blockPool.Wait(waitTimeout * time.Second)
-	blockPool.Stop()
-	blockPoolTester.refBlockChain[6] = []int{}
-	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
-}
-
-func TestPeerSwitchBack(t *testing.T) {
-	logInit()
-	_, blockPool, blockPoolTester := newTestBlockPool(t)
-	blockPoolTester.blockChain[0] = nil
-	blockPoolTester.initRefBlockChain(8)
-
-	blockPool.Start()
-
-	peer1 := blockPoolTester.newPeer("peer1", 2, 11)
-	peer2 := blockPoolTester.newPeer("peer2", 1, 8)
-	peer2.blocksRequestsMap = peer1.blocksRequestsMap
-
-	peer2.AddPeer()
-	go peer2.AddBlocks(7, 8)
-	go peer2.AddBlockHashes(8, 7, 6)
-	go peer2.AddBlockHashes(6, 5, 4)
-	peer2.AddBlocks(4, 5)                  // section partially complete
-	peer1.AddPeer()                        // peer1 is promoted as best peer
-	go peer1.AddBlocks(10, 11)             //
-	peer1.AddBlockHashes(11, 10)           // only gives useless results
-	blockPool.RemovePeer("peer1")          // peer1 disconnects
-	go peer2.AddBlockHashes(4, 3, 2, 1, 0) // tests that asking for hashes from 4 is remembered
-	go peer2.AddBlocks(3, 4, 5, 6, 7, 8)   // tests that section 4, 5, 6 and 7, 8 are remembered for missing blocks
-	peer2.AddBlocks(0, 1, 2, 3)
-
-	blockPool.Wait(waitTimeout * time.Second)
-	blockPool.Stop()
-	blockPoolTester.refBlockChain[8] = []int{}
-	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
-}
-
-func TestForkSimple(t *testing.T) {
-	logInit()
-	_, blockPool, blockPoolTester := newTestBlockPool(t)
-	blockPoolTester.blockChain[0] = nil
-	blockPoolTester.initRefBlockChain(9)
-	blockPoolTester.refBlockChain[3] = []int{4, 7}
-	delete(blockPoolTester.refBlockChain, 6)
-
-	blockPool.Start()
-
-	peer1 := blockPoolTester.newPeer("peer1", 1, 9)
-	peer2 := blockPoolTester.newPeer("peer2", 2, 6)
-	peer2.blocksRequestsMap = peer1.blocksRequestsMap
-
-	peer1.AddPeer()
-	go peer1.AddBlocks(8, 9)
-	go peer1.AddBlockHashes(9, 8, 7, 3, 2)
-	peer1.AddBlocks(1, 2, 3, 7, 8)
-	peer2.AddPeer()                        // peer2 is promoted as best peer
-	go peer2.AddBlocks(5, 6)               //
-	go peer2.AddBlockHashes(6, 5, 4, 3, 2) // fork on 3 -> 4 (earlier child: 7)
-	go peer2.AddBlocks(1, 2, 3, 4, 5)
-	go peer2.AddBlockHashes(2, 1, 0)
-	peer2.AddBlocks(0, 1, 2)
-
-	blockPool.Wait(waitTimeout * time.Second)
-	blockPool.Stop()
-	blockPoolTester.refBlockChain[6] = []int{}
-	blockPoolTester.refBlockChain[3] = []int{4}
-	delete(blockPoolTester.refBlockChain, 7)
-	delete(blockPoolTester.refBlockChain, 8)
-	delete(blockPoolTester.refBlockChain, 9)
-	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
-
-}
-
-func TestForkSwitchBackByNewBlocks(t *testing.T) {
-	logInit()
-	_, blockPool, blockPoolTester := newTestBlockPool(t)
-	blockPoolTester.blockChain[0] = nil
-	blockPoolTester.initRefBlockChain(11)
-	blockPoolTester.refBlockChain[3] = []int{4, 7}
-	delete(blockPoolTester.refBlockChain, 6)
-
-	blockPool.Start()
-
-	peer1 := blockPoolTester.newPeer("peer1", 1, 9)
-	peer2 := blockPoolTester.newPeer("peer2", 2, 6)
-	peer2.blocksRequestsMap = peer1.blocksRequestsMap
-
-	peer1.AddPeer()
-	peer1.AddBlocks(8, 9)                  //
-	go peer1.AddBlockHashes(9, 8, 7, 3, 2) //
-	peer1.AddBlocks(7, 8)                  // partial section
-	peer2.AddPeer()                        //
-	peer2.AddBlocks(5, 6)                  //
-	go peer2.AddBlockHashes(6, 5, 4, 3, 2) // peer2 forks on block 3
-	peer2.AddBlocks(1, 2, 3, 4, 5)         //
-
-	// peer1 finds new blocks
-	peer1.td = 3
-	peer1.currentBlock = 11
-	peer1.AddPeer()
-	go peer1.AddBlocks(10, 11)
-	go peer1.AddBlockHashes(11, 10, 9)
-	peer1.AddBlocks(9, 10)
-	go peer1.AddBlocks(3, 7)         // tests that block requests on earlier fork are remembered
-	go peer1.AddBlockHashes(2, 1, 0) // tests that hash request from root of connecting chain section (added by demoted peer) is remembered
-	peer1.AddBlocks(0, 1)
-
-	blockPool.Wait(waitTimeout * time.Second)
-	blockPool.Stop()
-	blockPoolTester.refBlockChain[11] = []int{}
-	blockPoolTester.refBlockChain[3] = []int{7}
-	delete(blockPoolTester.refBlockChain, 6)
-	delete(blockPoolTester.refBlockChain, 5)
-	delete(blockPoolTester.refBlockChain, 4)
-	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
-
-}
-
-func TestForkSwitchBackByPeerSwitchBack(t *testing.T) {
-	logInit()
-	_, blockPool, blockPoolTester := newTestBlockPool(t)
-	blockPoolTester.blockChain[0] = nil
-	blockPoolTester.initRefBlockChain(9)
-	blockPoolTester.refBlockChain[3] = []int{4, 7}
-	delete(blockPoolTester.refBlockChain, 6)
-
-	blockPool.Start()
-
-	peer1 := blockPoolTester.newPeer("peer1", 1, 9)
-	peer2 := blockPoolTester.newPeer("peer2", 2, 6)
-	peer2.blocksRequestsMap = peer1.blocksRequestsMap
-
-	peer1.AddPeer()
-	go peer1.AddBlocks(8, 9)
-	go peer1.AddBlockHashes(9, 8, 7, 3, 2)
-	peer1.AddBlocks(7, 8)
-	peer2.AddPeer()
-	go peer2.AddBlocks(5, 6)               //
-	go peer2.AddBlockHashes(6, 5, 4, 3, 2) // peer2 forks on block 3
-	peer2.AddBlocks(2, 3, 4, 5)            //
-	blockPool.RemovePeer("peer2")          // peer2 disconnects, peer1 is promoted again as best peer
-	go peer1.AddBlocks(3, 7)               // tests that block requests on earlier fork are remembered and orphan section relinks to existing parent block
-	go peer1.AddBlocks(1, 2)               //
-	go peer1.AddBlockHashes(2, 1, 0)       //
-	peer1.AddBlocks(0, 1)
-
-	blockPool.Wait(waitTimeout * time.Second)
-	blockPool.Stop()
-	blockPoolTester.refBlockChain[9] = []int{}
-	blockPoolTester.refBlockChain[3] = []int{7}
-	delete(blockPoolTester.refBlockChain, 6)
-	delete(blockPoolTester.refBlockChain, 5)
-	delete(blockPoolTester.refBlockChain, 4)
-	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
-
-}
-
-func TestForkCompleteSectionSwitchBackByPeerSwitchBack(t *testing.T) {
-	logInit()
-	_, blockPool, blockPoolTester := newTestBlockPool(t)
-	blockPoolTester.blockChain[0] = nil
-	blockPoolTester.initRefBlockChain(9)
-	blockPoolTester.refBlockChain[3] = []int{4, 7}
-	delete(blockPoolTester.refBlockChain, 6)
-
-	blockPool.Start()
-
-	peer1 := blockPoolTester.newPeer("peer1", 1, 9)
-	peer2 := blockPoolTester.newPeer("peer2", 2, 6)
-	peer2.blocksRequestsMap = peer1.blocksRequestsMap
-
-	peer1.AddPeer()
-	go peer1.AddBlocks(8, 9)
-	go peer1.AddBlockHashes(9, 8, 7)
-	peer1.AddBlocks(3, 7, 8) // make sure this section is complete
-	time.Sleep(1 * time.Second)
-	go peer1.AddBlockHashes(7, 3, 2)       // block 3/7 is section boundary
-	peer1.AddBlocks(2, 3)                  // partially complete sections block 2 missing
-	peer2.AddPeer()                        //
-	go peer2.AddBlocks(5, 6)               //
-	go peer2.AddBlockHashes(6, 5, 4, 3, 2) // peer2 forks on block 3
-	peer2.AddBlocks(2, 3, 4, 5)            // block 2 still missing.
-	blockPool.RemovePeer("peer2")          // peer2 disconnects, peer1 is promoted again as best peer
-	// peer1.AddBlockHashes(7, 3)             // tests that hash request from fork root is remembered even though section process completed
-	go peer1.AddBlockHashes(2, 1, 0) //
-	peer1.AddBlocks(0, 1, 2)
-
-	blockPool.Wait(waitTimeout * time.Second)
-	blockPool.Stop()
-	blockPoolTester.refBlockChain[9] = []int{}
-	blockPoolTester.refBlockChain[3] = []int{7}
-	delete(blockPoolTester.refBlockChain, 6)
-	delete(blockPoolTester.refBlockChain, 5)
-	delete(blockPoolTester.refBlockChain, 4)
-	blockPoolTester.checkBlockChain(blockPoolTester.refBlockChain)
-
-}

eth/error.go

@@ -1,72 +0,0 @@
-package eth
-
-import (
-	"fmt"
-)
-
-const (
-	ErrMsgTooLarge = iota
-	ErrDecode
-	ErrInvalidMsgCode
-	ErrProtocolVersionMismatch
-	ErrNetworkIdMismatch
-	ErrGenesisBlockMismatch
-	ErrNoStatusMsg
-	ErrExtraStatusMsg
-	ErrInvalidBlock
-	ErrInvalidPoW
-	ErrUnrequestedBlock
-	ErrInsufficientChainInfo
-)
-
-var errorToString = map[int]string{
-	ErrMsgTooLarge:             "Message too long",
-	ErrDecode:                  "Invalid message",
-	ErrInvalidMsgCode:          "Invalid message code",
-	ErrProtocolVersionMismatch: "Protocol version mismatch",
-	ErrNetworkIdMismatch:       "NetworkId mismatch",
-	ErrGenesisBlockMismatch:    "Genesis block mismatch",
-	ErrNoStatusMsg:             "No status message",
-	ErrExtraStatusMsg:          "Extra status message",
-	ErrInvalidBlock:            "Invalid block",
-	ErrInvalidPoW:              "Invalid PoW",
-	ErrUnrequestedBlock:        "Unrequested block",
-	ErrInsufficientChainInfo:   "Insufficient chain info",
-}
-
-type protocolError struct {
-	Code    int
-	fatal   bool
-	message string
-	format  string
-	params  []interface{}
-	// size    int
-}
-
-func newProtocolError(code int, format string, params ...interface{}) *protocolError {
-	return &protocolError{Code: code, format: format, params: params}
-}
-
-func ProtocolError(code int, format string, params ...interface{}) (err *protocolError) {
-	err = newProtocolError(code, format, params...)
-	// report(err)
-	return
-}
-
-func (self protocolError) Error() (message string) {
-	if len(message) == 0 {
-		var ok bool
-		self.message, ok = errorToString[self.Code]
-		if !ok {
-			panic("invalid error code")
-		}
-		if self.format != "" {
-			self.message += ": " + fmt.Sprintf(self.format, self.params...)
-		}
-	}
-	return self.message
-}
-
-func (self *protocolError) Fatal() bool {
-	return self.fatal
-}

eth/protocol.go

@@ -3,10 +3,10 @@ package eth
 import (
 	"bytes"
 	"fmt"
-	"io"
 	"math/big"
 
 	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/errs"
 	"github.com/ethereum/go-ethereum/ethutil"
 	"github.com/ethereum/go-ethereum/logger"
 	"github.com/ethereum/go-ethereum/p2p"
@@ -14,10 +14,12 @@ import (
 )
 
 const (
-	ProtocolVersion    = 54
+	ProtocolVersion    = 56
 	NetworkId          = 0
 	ProtocolLength     = uint64(8)
 	ProtocolMaxMsgSize = 10 * 1024 * 1024
+	maxHashes          = 256
+	maxBlocks          = 64
 )
 
 // eth protocol message codes
@@ -32,6 +34,28 @@ const (
 	NewBlockMsg
 )
 
+const (
+	ErrMsgTooLarge = iota
+	ErrDecode
+	ErrInvalidMsgCode
+	ErrProtocolVersionMismatch
+	ErrNetworkIdMismatch
+	ErrGenesisBlockMismatch
+	ErrNoStatusMsg
+	ErrExtraStatusMsg
+)
+
+var errorToString = map[int]string{
+	ErrMsgTooLarge:             "Message too long",
+	ErrDecode:                  "Invalid message",
+	ErrInvalidMsgCode:          "Invalid message code",
+	ErrProtocolVersionMismatch: "Protocol version mismatch",
+	ErrNetworkIdMismatch:       "NetworkId mismatch",
+	ErrGenesisBlockMismatch:    "Genesis block mismatch",
+	ErrNoStatusMsg:             "No status message",
+	ErrExtraStatusMsg:          "Extra status message",
+}
+
 // ethProtocol represents the ethereum wire protocol
 // instance is running on each peer
 type ethProtocol struct {
@@ -41,6 +65,7 @@ type ethProtocol struct {
 	peer         *p2p.Peer
 	id           string
 	rw           p2p.MsgReadWriter
+	errors       *errs.Errors
 }
 
 // backend is the interface the ethereum protocol backend should implement
@@ -59,7 +84,7 @@ type chainManager interface {
 type blockPool interface {
 	AddBlockHashes(next func() ([]byte, bool), peerId string)
 	AddBlock(block *types.Block, peerId string)
-	AddPeer(td *big.Int, currentBlock []byte, peerId string, requestHashes func([]byte) error, requestBlocks func([][]byte) error, peerError func(int, string, ...interface{})) (best bool)
+	AddPeer(td *big.Int, currentBlock []byte, peerId string, requestHashes func([]byte) error, requestBlocks func([][]byte) error, peerError func(*errs.Error)) (best bool)
 	RemovePeer(peerId string)
 }
 
@@ -69,8 +94,6 @@ type newBlockMsgData struct {
 	TD    *big.Int
 }
 
-const maxHashes = 255
-
 type getBlockHashesMsgData struct {
 	Hash   []byte
 	Amount uint64
@@ -100,7 +123,11 @@ func runEthProtocol(txPool txPool, chainManager chainManager, blockPool blockPoo
 		blockPool:    blockPool,
 		rw:           rw,
 		peer:         peer,
-		id:           fmt.Sprintf("%x", id[:8]),
+		errors: &errs.Errors{
+			Package: "ETH",
+			Errors:  errorToString,
+		},
+		id: fmt.Sprintf("%x", id[:8]),
 	}
 	err = self.handleStatus()
 	if err == nil {
@@ -152,7 +179,6 @@ func (self *ethProtocol) handle() error {
 			return self.protoError(ErrDecode, "->msg %v: %v", msg, err)
 		}
 
-		//request.Amount = uint64(math.Min(float64(maxHashes), float64(request.Amount)))
 		if request.Amount > maxHashes {
 			request.Amount = maxHashes
 		}
@@ -160,35 +186,38 @@ func (self *ethProtocol) handle() error {
 		return p2p.EncodeMsg(self.rw, BlockHashesMsg, ethutil.ByteSliceToInterface(hashes)...)
 
 	case BlockHashesMsg:
-		// TODO: redo using lazy decode , this way very inefficient on known chains
 		msgStream := rlp.NewStream(msg.Payload)
-		var err error
-		var i int
-
-		iter := func() (hash []byte, ok bool) {
-			hash, err = msgStream.Bytes()
-			if err == nil {
-				i++
-				ok = true
-			} else {
-				if err != io.EOF {
-					self.protoError(ErrDecode, "msg %v: after %v hashes : %v", msg, i, err)
-				}
-			}
-			return
+		if _, err := msgStream.List(); err != nil {
+			return err
 		}
 
+		var i int
+		iter := func() (hash []byte, ok bool) {
+			hash, err := msgStream.Bytes()
+			if err == rlp.EOL {
+				return nil, false
+			} else if err != nil {
+				self.protoError(ErrDecode, "msg %v: after %v hashes : %v", msg, i, err)
+				return nil, false
+			}
+			i++
+			return hash, true
+		}
 		self.blockPool.AddBlockHashes(iter, self.id)
 
 	case GetBlocksMsg:
 		msgStream := rlp.NewStream(msg.Payload)
+		if _, err := msgStream.List(); err != nil {
+			return err
+		}
+
 		var blocks []interface{}
 		var i int
 		for {
 			i++
 			var hash []byte
 			if err := msgStream.Decode(&hash); err != nil {
-				if err == io.EOF {
+				if err == rlp.EOL {
 					break
 				} else {
 					return self.protoError(ErrDecode, "msg %v: %v", msg, err)
@@ -198,7 +227,7 @@ func (self *ethProtocol) handle() error {
 			if block != nil {
 				blocks = append(blocks, block)
 			}
-			if i == blockHashesBatchSize {
+			if i == maxBlocks {
 				break
 			}
 		}
@@ -206,10 +235,13 @@ func (self *ethProtocol) handle() error {
 
 	case BlocksMsg:
 		msgStream := rlp.NewStream(msg.Payload)
+		if _, err := msgStream.List(); err != nil {
+			return err
+		}
 		for {
 			var block types.Block
 			if err := msgStream.Decode(&block); err != nil {
-				if err == io.EOF {
+				if err == rlp.EOL {
 					break
 				} else {
 					return self.protoError(ErrDecode, "msg %v: %v", msg, err)
@@ -224,8 +256,18 @@ func (self *ethProtocol) handle() error {
 			return self.protoError(ErrDecode, "msg %v: %v", msg, err)
 		}
 		hash := request.Block.Hash()
+		fmt.Println("received block: %x", hash)
+		_, chainHead, _ := self.chainManager.Status()
+
+		jsonlogger.LogJson(&logger.EthChainReceivedNewBlock{
+			BlockHash:     ethutil.Bytes2Hex(hash),
+			BlockNumber:   request.Block.Number(), // this surely must be zero
+			ChainHeadHash: ethutil.Bytes2Hex(chainHead),
+			BlockPrevHash: ethutil.Bytes2Hex(request.Block.ParentHash()),
+			RemoteId:      self.peer.ID().String(),
+		})
 		// to simplify backend interface adding a new block
-		// uses AddPeer followed by AddHashes, AddBlock only if peer is the best peer
+		// uses AddPeer followed by AddBlock only if peer is the best peer
 		// (or selected as new best peer)
 		if self.blockPool.AddPeer(request.TD, hash, self.id, self.requestBlockHashes, self.requestBlocks, self.protoErrorDisconnect) {
 			self.blockPool.AddBlock(request.Block, self.id)
@@ -284,7 +326,7 @@ func (self *ethProtocol) handleStatus() error {
 
 	_, _, genesisBlock := self.chainManager.Status()
 
-	if bytes.Compare(status.GenesisBlock, genesisBlock) != 0 {
+	if !bytes.Equal(status.GenesisBlock, genesisBlock) {
 		return self.protoError(ErrGenesisBlockMismatch, "%x (!= %x)", status.GenesisBlock, genesisBlock)
 	}
 
@@ -304,8 +346,8 @@ func (self *ethProtocol) handleStatus() error {
 }
 
 func (self *ethProtocol) requestBlockHashes(from []byte) error {
-	self.peer.Debugf("fetching hashes (%d) %x...\n", blockHashesBatchSize, from[0:4])
-	return p2p.EncodeMsg(self.rw, GetBlockHashesMsg, interface{}(from), uint64(blockHashesBatchSize))
+	self.peer.Debugf("fetching hashes (%d) %x...\n", maxHashes, from[0:4])
+	return p2p.EncodeMsg(self.rw, GetBlockHashesMsg, interface{}(from), uint64(maxHashes))
 }
 
 func (self *ethProtocol) requestBlocks(hashes [][]byte) error {
@@ -313,26 +355,17 @@ func (self *ethProtocol) requestBlocks(hashes [][]byte) error {
 	return p2p.EncodeMsg(self.rw, GetBlocksMsg, ethutil.ByteSliceToInterface(hashes)...)
 }
 
-func (self *ethProtocol) protoError(code int, format string, params ...interface{}) (err *protocolError) {
-	err = ProtocolError(code, format, params...)
-	if err.Fatal() {
-		self.peer.Errorln("err %v", err)
-		// disconnect
-	} else {
-		self.peer.Debugf("fyi %v", err)
-	}
+func (self *ethProtocol) protoError(code int, format string, params ...interface{}) (err *errs.Error) {
+	err = self.errors.New(code, format, params...)
+	err.Log(self.peer.Logger)
 	return
 }
 
-func (self *ethProtocol) protoErrorDisconnect(code int, format string, params ...interface{}) {
-	err := ProtocolError(code, format, params...)
+func (self *ethProtocol) protoErrorDisconnect(err *errs.Error) {
+	err.Log(self.peer.Logger)
 	if err.Fatal() {
-		self.peer.Errorln("err %v", err)
-		// disconnect
-	} else {
-		self.peer.Debugf("fyi %v", err)
+		self.peer.Disconnect(p2p.DiscSubprotocolError)
 	}
-
 }
 
 func (self *ethProtocol) propagateTxs() {

eth/protocol_test.go

@@ -11,13 +11,22 @@ import (
 
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
+	"github.com/ethereum/go-ethereum/errs"
 	"github.com/ethereum/go-ethereum/ethutil"
-	"github.com/ethereum/go-ethereum/logger"
 	"github.com/ethereum/go-ethereum/p2p"
 	"github.com/ethereum/go-ethereum/p2p/discover"
 )
 
-var sys = logger.NewStdLogSystem(os.Stdout, log.LstdFlags, logger.LogLevel(logger.DebugDetailLevel))
+var logsys = ethlogger.NewStdLogSystem(os.Stdout, log.LstdFlags, ethlogger.LogLevel(ethlogger.DebugDetailLevel))
+
+var ini = false
+
+func logInit() {
+	if !ini {
+		ethlogger.AddLogSystem(logsys)
+		ini = true
+	}
+}
 
 type testMsgReadWriter struct {
 	in  chan p2p.Msg
@@ -64,7 +73,7 @@ type testChainManager struct {
 type testBlockPool struct {
 	addBlockHashes func(next func() ([]byte, bool), peerId string)
 	addBlock       func(block *types.Block, peerId string) (err error)
-	addPeer        func(td *big.Int, currentBlock []byte, peerId string, requestHashes func([]byte) error, requestBlocks func([][]byte) error, peerError func(int, string, ...interface{})) (best bool)
+	addPeer        func(td *big.Int, currentBlock []byte, peerId string, requestHashes func([]byte) error, requestBlocks func([][]byte) error, peerError func(*errs.Error)) (best bool)
 	removePeer     func(peerId string)
 }
 
@@ -116,7 +125,7 @@ func (self *testBlockPool) AddBlock(block *types.Block, peerId string) {
 	}
 }
 
-func (self *testBlockPool) AddPeer(td *big.Int, currentBlock []byte, peerId string, requestBlockHashes func([]byte) error, requestBlocks func([][]byte) error, peerError func(int, string, ...interface{})) (best bool) {
+func (self *testBlockPool) AddPeer(td *big.Int, currentBlock []byte, peerId string, requestBlockHashes func([]byte) error, requestBlocks func([][]byte) error, peerError func(*errs.Error)) (best bool) {
 	if self.addPeer != nil {
 		best = self.addPeer(td, currentBlock, peerId, requestBlockHashes, requestBlocks, peerError)
 	}
@@ -169,7 +178,7 @@ func (self *ethProtocolTester) checkError(expCode int, delay time.Duration) (err
 		self.t.Errorf("no error after %v, expected %v", delay, expCode)
 		return
 	}
-	perr, ok := err.(*protocolError)
+	perr, ok := err.(*errs.Error)
 	if ok && perr != nil {
 		if code := perr.Code; code != expCode {
 			self.t.Errorf("expected protocol error (code %v), got %v (%v)", expCode, code, err)

eth/test/README.md

@@ -1,27 +0,0 @@
-= Integration tests for eth protocol and blockpool 
-
-This is a simple suite of tests to fire up a local test node with peers to test blockchain synchronisation and download. 
-The scripts call ethereum (assumed to be compiled in go-ethereum root). 
-
-To run a test:
-
-    . run.sh 00 02
-
-Without arguments, all tests are run. 
-
-Peers are launched with preloaded imported chains. In order to prevent them from synchronizing with each other they are set with `-dial=false` and `-maxpeer 1` options. They log into `/tmp/eth.test/nodes/XX` where XX is the last two digits of their port. 
-
-Chains to import can be bootstrapped by letting nodes mine for some time. This is done with 
-
-    . bootstrap.sh 
-
-Only the relative timing and forks matter so they should work if the bootstrap script is rerun. 
-The reference blockchain of tests are soft links to these import chains and check at the end of a test run. 
-
-Connecting to peers and exporting blockchain is scripted with JS files executed by the JSRE, see `tests/XX.sh`. 
-
-Each test is set with a timeout. This may vary on different computers so adjust sensibly. 
-If you kill a test before it completes, do not forget to kill all the background processes, since they will impact the result. Use:
-
-    killall ethereum
-

eth/test/bootstrap.sh

@@ -1,9 +0,0 @@
-#!/bin/bash
-# bootstrap chains - used to regenerate tests/chains/*.chain
-
-mkdir -p chains
-bash ./mine.sh 00 10
-bash ./mine.sh 01 5 00
-bash ./mine.sh 02 10 00
-bash ./mine.sh 03 5 02
-bash ./mine.sh 04 10 02

eth/test/mine.sh

@@ -1,20 +0,0 @@
-#!/bin/bash
-# bash ./mine.sh node_id timeout(sec) [basechain]
-ETH=../../ethereum
-MINE="$ETH -datadir tmp/nodes/$1 -seed=false -port '' -shh=false -id test$1"
-rm -rf tmp/nodes/$1
-echo "Creating chain $1..."
-if [[ "" !=  "$3" ]]; then
-  CHAIN="chains/$3.chain"
-  CHAINARG="-chain $CHAIN"
-  $MINE -mine $CHAINARG -loglevel 3 | grep 'importing'
-fi
-$MINE -mine -loglevel 0 &
-PID=$!
-sleep $2
-kill $PID
-$MINE -loglevel 3 <(echo "eth.export(\"chains/$1.chain\")") > /tmp/eth.test/mine.tmp &
-PID=$!
-sleep 1
-kill $PID
-cat /tmp/eth.test/mine.tmp | grep 'exporting'

eth/test/run.sh

@@ -1,53 +0,0 @@
-#!/bin/bash
-# bash run.sh (testid0 testid1 ...)
-# runs tests tests/testid0.sh tests/testid1.sh ...
-# without arguments, it runs all tests
-
-. tests/common.sh
-
-TESTS=
-
-if [ "$#" -eq 0 ]; then
-  for NAME in tests/??.sh; do
-    i=`basename $NAME .sh`
-    TESTS="$TESTS $i"
-  done
-else
-  TESTS=$@
-fi
-
-ETH=../../ethereum
-DIR="/tmp/eth.test/nodes"
-TIMEOUT=10
-
-mkdir -p $DIR/js
-
-echo "running tests $TESTS"
-for NAME in $TESTS; do
-  PIDS=
-  CHAIN="tests/$NAME.chain"
-  JSFILE="$DIR/js/$NAME.js"
-  CHAIN_TEST="$DIR/$NAME/chain"
-
-  echo "RUN: test $NAME"
-  cat tests/common.js > $JSFILE
-  . tests/$NAME.sh
-  sleep $TIMEOUT
-  echo "timeout after $TIMEOUT seconds: killing $PIDS"
-  kill $PIDS
-  if [ -r "$CHAIN" ]; then
-    if diff $CHAIN $CHAIN_TEST >/dev/null ; then
-      echo "chain ok: $CHAIN=$CHAIN_TEST"
-    else
-      echo "FAIL: chains differ: expected $CHAIN ; got $CHAIN_TEST"
-      continue
-    fi
-  fi
-  ERRORS=$DIR/errors
-  if [ -r "$ERRORS" ]; then
-    echo "FAIL: "
-    cat $ERRORS
-  else
-    echo PASS
-  fi
-done

eth/test/tests/00.chain

@@ -1 +0,0 @@
-../chains/01.chain

eth/test/tests/00.sh

@@ -1,13 +0,0 @@
-#!/bin/bash
-
-TIMEOUT=4
-
-cat >> $JSFILE <<EOF
-eth.addPeer("localhost:30311");
-sleep(1000)
-eth.export("$CHAIN_TEST");
-EOF
-
-peer 11 01
-test_node $NAME "" -loglevel 5 $JSFILE
-

eth/test/tests/01.chain

@@ -1 +0,0 @@
-../chains/02.chain

eth/test/tests/01.sh

@@ -1,18 +0,0 @@
-#!/bin/bash
-
-TIMEOUT=5
-
-cat >> $JSFILE <<EOF
-eth.addPeer("localhost:30311");
-log("added peer localhost:30311");
-sleep(1000);
-log("added peer localhost:30312");
-eth.addPeer("localhost:30312");
-sleep(3000);
-eth.export("$CHAIN_TEST");
-EOF
-
-peer 11 01
-peer 12 02
-test_node $NAME "" -loglevel 5 $JSFILE
-

eth/test/tests/02.chain

@@ -1 +0,0 @@
-../chains/01.chain

eth/test/tests/02.sh

@@ -1,19 +0,0 @@
-#!/bin/bash
-
-TIMEOUT=6
-
-cat >> $JSFILE <<EOF
-eth.addPeer("localhost:30311");
-sleep(200);
-eth.addPeer("localhost:30312");
-sleep(3000);
-eth.export("$CHAIN_TEST");
-EOF
-
-peer 11 01
-peer 12 02
-P12ID=$PID
-test_node $NAME "" -loglevel 5 $JSFILE
-sleep 0.3
-kill $P12ID
-

eth/test/tests/03.chain

@@ -1 +0,0 @@
-../chains/12k.chain

eth/test/tests/03.sh

@@ -1,14 +0,0 @@
-#!/bin/bash
-
-TIMEOUT=12
-
-cat >> $JSFILE <<EOF
-eth.addPeer("localhost:30311");
-sleep(10000);
-eth.export("$CHAIN_TEST");
-EOF
-
-peer 11 12k
-sleep 2
-test_node $NAME "" -loglevel 5 $JSFILE
-

eth/test/tests/04.sh

@@ -1,17 +0,0 @@
-#!/bin/bash
-
-TIMEOUT=15
-
-cat >> $JSFILE <<EOF
-eth.addPeer("localhost:30311");
-sleep(200);
-eth.addPeer("localhost:30312");
-sleep(13000);
-eth.export("$CHAIN_TEST");
-EOF
-
-peer 11 01 -mine
-peer 12 02
-test_node $NAME "" -loglevel 5 $JSFILE
-sleep 6
-cat $DIR/$NAME/debug.log | grep 'best peer'

eth/test/tests/05.sh

@@ -1,20 +0,0 @@
-#!/bin/bash
-
-TIMEOUT=60
-
-cat >> $JSFILE <<EOF
-eth.addPeer("localhost:30311");
-sleep(200);
-eth.addPeer("localhost:30312");
-eth.addPeer("localhost:30313");
-eth.addPeer("localhost:30314");
-sleep(3000);
-eth.export("$CHAIN_TEST");
-EOF
-
-peer 11 01 -mine
-peer 12 02 -mine
-peer 13 03
-peer 14 04
-test_node $NAME "" -loglevel 5 $JSFILE
-

eth/test/tests/common.js

@@ -1,9 +0,0 @@
-function log(text) {
-  console.log("[JS TEST SCRIPT] " + text);
-}
-
-function sleep(seconds) {
-    var now = new Date().getTime();
-    while(new Date().getTime() < now + seconds){}
-}
-

eth/test/tests/common.sh

@@ -1,20 +0,0 @@
-#!/bin/bash
-
-# launched by run.sh
-function test_node {
-  rm -rf $DIR/$1
-  ARGS="-datadir $DIR/$1 -debug debug -seed=false -shh=false -id test$1 -port 303$1"
-  if [ "" != "$2" ]; then
-    chain="chains/$2.chain"
-    echo "import chain $chain"
-    $ETH $ARGS -loglevel 3 -chain $chain | grep CLI |grep import
-  fi
-  echo "starting test node $1 with args $ARGS ${@:3}"
-  $ETH $ARGS  ${@:3} &
-  PID=$!
-  PIDS="$PIDS $PID"
-}
-
-function peer {
-  test_node $@ -loglevel 5 -logfile debug.log -maxpeer 1 -dial=false
-}

javascript/javascript_runtime.go

@@ -6,15 +6,7 @@ import (
 	"os"
 	"path"
 	"path/filepath"
-
-	"github.com/ethereum/go-ethereum/cmd/utils"
-	"github.com/ethereum/go-ethereum/core"
-	"github.com/ethereum/go-ethereum/core/types"
-	"github.com/ethereum/go-ethereum/eth"
-	"github.com/ethereum/go-ethereum/ethutil"
-	"github.com/ethereum/go-ethereum/event"
 	"github.com/ethereum/go-ethereum/logger"
-	"github.com/ethereum/go-ethereum/state"
 	"github.com/ethereum/go-ethereum/xeth"
 	"github.com/obscuren/otto"
 )
@@ -22,11 +14,8 @@ import (
 var jsrelogger = logger.NewLogger("JSRE")
 
 type JSRE struct {
-	ethereum *eth.Ethereum
-	Vm       *otto.Otto
-	xeth     *xeth.XEth
-
-	events event.Subscription
+	Vm   *otto.Otto
+	xeth *xeth.XEth
 
 	objectCb map[string][]otto.Value
 }
@@ -45,12 +34,10 @@ func (jsre *JSRE) LoadIntFile(file string) {
 	jsre.LoadExtFile(path.Join(assetPath, file))
 }
 
-func NewJSRE(ethereum *eth.Ethereum) *JSRE {
+func NewJSRE(xeth *xeth.XEth) *JSRE {
 	re := &JSRE{
-		ethereum,
 		otto.New(),
-		xeth.New(ethereum),
-		nil,
+		xeth,
 		make(map[string][]otto.Value),
 	}
 
@@ -60,14 +47,7 @@ func NewJSRE(ethereum *eth.Ethereum) *JSRE {
 	// Load extra javascript files
 	re.LoadIntFile("bignumber.min.js")
 
-	// Subscribe to events
-	mux := ethereum.EventMux()
-	re.events = mux.Subscribe(core.NewBlockEvent{})
-
-	// We have to make sure that, whoever calls this, calls "Stop"
-	go re.mainLoop()
-
-	re.Bind("eth", &JSEthereum{re.xeth, re.Vm, ethereum})
+	re.Bind("eth", &JSEthereum{re.xeth, re.Vm})
 
 	re.initStdFuncs()
 
@@ -84,6 +64,12 @@ func (self *JSRE) Run(code string) (otto.Value, error) {
 	return self.Vm.Run(code)
 }
 
+func (self *JSRE) initStdFuncs() {
+	t, _ := self.Vm.Get("eth")
+	eth := t.Object()
+	eth.Set("require", self.require)
+}
+
 func (self *JSRE) Require(file string) error {
 	if len(filepath.Ext(file)) == 0 {
 		file += ".js"
@@ -100,83 +86,6 @@ func (self *JSRE) Require(file string) error {
 	return nil
 }
 
-func (self *JSRE) Stop() {
-	self.events.Unsubscribe()
-	jsrelogger.Infoln("stopped")
-}
-
-func (self *JSRE) mainLoop() {
-	for _ = range self.events.Chan() {
-	}
-}
-
-func (self *JSRE) initStdFuncs() {
-	t, _ := self.Vm.Get("eth")
-	eth := t.Object()
-	eth.Set("connect", self.connect)
-	eth.Set("require", self.require)
-	eth.Set("stopMining", self.stopMining)
-	eth.Set("startMining", self.startMining)
-	eth.Set("dump", self.dump)
-	eth.Set("export", self.export)
-}
-
-/*
- * The following methods are natively implemented javascript functions
- */
-
-func (self *JSRE) dump(call otto.FunctionCall) otto.Value {
-	var block *types.Block
-
-	if len(call.ArgumentList) > 0 {
-		if call.Argument(0).IsNumber() {
-			num, _ := call.Argument(0).ToInteger()
-			block = self.ethereum.ChainManager().GetBlockByNumber(uint64(num))
-		} else if call.Argument(0).IsString() {
-			hash, _ := call.Argument(0).ToString()
-			block = self.ethereum.ChainManager().GetBlock(ethutil.Hex2Bytes(hash))
-		} else {
-			fmt.Println("invalid argument for dump. Either hex string or number")
-		}
-
-		if block == nil {
-			fmt.Println("block not found")
-
-			return otto.UndefinedValue()
-		}
-
-	} else {
-		block = self.ethereum.ChainManager().CurrentBlock()
-	}
-
-	statedb := state.New(block.Root(), self.ethereum.Db())
-
-	v, _ := self.Vm.ToValue(statedb.RawDump())
-
-	return v
-}
-
-func (self *JSRE) stopMining(call otto.FunctionCall) otto.Value {
-	v, _ := self.Vm.ToValue(utils.StopMining(self.ethereum))
-	return v
-}
-
-func (self *JSRE) startMining(call otto.FunctionCall) otto.Value {
-	v, _ := self.Vm.ToValue(utils.StartMining(self.ethereum))
-	return v
-}
-
-func (self *JSRE) connect(call otto.FunctionCall) otto.Value {
-	nodeURL, err := call.Argument(0).ToString()
-	if err != nil {
-		return otto.FalseValue()
-	}
-	if err := self.ethereum.SuggestPeer(nodeURL); err != nil {
-		return otto.FalseValue()
-	}
-	return otto.TrueValue()
-}
-
 func (self *JSRE) require(call otto.FunctionCall) otto.Value {
 	file, err := call.Argument(0).ToString()
 	if err != nil {
@@ -191,25 +100,3 @@ func (self *JSRE) require(call otto.FunctionCall) otto.Value {
 
 	return t
 }
-
-func (self *JSRE) export(call otto.FunctionCall) otto.Value {
-	if len(call.ArgumentList) == 0 {
-		fmt.Println("err: require file name")
-		return otto.FalseValue()
-	}
-
-	fn, err := call.Argument(0).ToString()
-	if err != nil {
-		fmt.Println(err)
-		return otto.FalseValue()
-	}
-
-	data := self.ethereum.ChainManager().Export()
-
-	if err := ethutil.WriteFile(fn, data); err != nil {
-		fmt.Println(err)
-		return otto.FalseValue()
-	}
-
-	return otto.TrueValue()
-}

javascript/types.go

@@ -2,8 +2,6 @@ package javascript
 
 import (
 	"fmt"
-
-	"github.com/ethereum/go-ethereum/eth"
 	"github.com/ethereum/go-ethereum/ethutil"
 	"github.com/ethereum/go-ethereum/state"
 	"github.com/ethereum/go-ethereum/xeth"
@@ -55,8 +53,7 @@ func NewJSLog(log state.Log) JSLog {
 
 type JSEthereum struct {
 	*xeth.XEth
-	vm       *otto.Otto
-	ethereum *eth.Ethereum
+	vm *otto.Otto
 }
 
 func (self *JSEthereum) Block(v interface{}) otto.Value {