core, trie: store bytecodes under a separate database prefix

core/blockchain.go

@@ -694,7 +694,15 @@ func (bc *BlockChain) GetUnclesInChain(block *types.Block, length int) []*types.
 // TrieNode retrieves a blob of data associated with a trie node (or code hash)
 // either from ephemeral in-memory cache, or from persistent storage.
 func (bc *BlockChain) TrieNode(hash common.Hash) ([]byte, error) {
-	return bc.stateCache.TrieDB().Node(common.Hash{}, hash) // TODO(karalabe): make this work again
+	// Attempt to satisfy this request with a trie node
+	if blob, err := bc.stateCache.TrieDB().Node(hash); blob != nil && err == nil {
+		return blob, nil
+	}
+	// Trie node not found, it may be a bytecode
+	if blob := rawdb.ReadCode(bc.db, hash); blob != nil {
+		return blob, nil
+	}
+	return nil, errors.New("not found")
 }
 
 // Stop stops the blockchain service. If any imports are currently in progress

core/rawdb/accessors_state.go

@@ -0,0 +1,42 @@
+// Copyright 2019 The go-ethereum Authors
+// This file is part of the go-ethereum library.
+//
+// The go-ethereum library is free software: you can redistribute it and/or modify
+// it under the terms of the GNU Lesser General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// The go-ethereum 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 Lesser General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public License
+// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
+
+package rawdb
+
+import (
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/log"
+)
+
+// ReadCode retrieves the bytecode associated with a given hash.
+func ReadCode(db DatabaseReader, hash common.Hash) []byte {
+	code, _ := db.Get(codeKey(hash))
+	return code
+}
+
+// WriteCode stores the bytecode associated with a given hash.
+func WriteCode(db DatabaseWriter, hash common.Hash, code []byte) {
+	if err := db.Put(codeKey(hash), code); err != nil {
+		log.Crit("Failed to store bytecode", "err", err)
+	}
+}
+
+// DeleteCode removes the bytecode associated with a given hash.
+func DeleteCode(db DatabaseDeleter, hash common.Hash) {
+	if err := db.Delete(codeKey(hash)); err != nil {
+		log.Crit("Failed to delete bytecode", "err", err)
+	}
+}

core/rawdb/schema.go

@@ -53,6 +53,8 @@ var (
 	txLookupPrefix  = []byte("l") // txLookupPrefix + hash -> transaction/receipt lookup metadata
 	bloomBitsPrefix = []byte("B") // bloomBitsPrefix + bit (uint16 big endian) + section (uint64 big endian) + hash -> bloom bits
 
+	codePrefix = []byte("c") // codePrefix + hash -> bytecode
+
 	preimagePrefix = []byte("secure-key-")      // preimagePrefix + hash -> preimage
 	configPrefix   = []byte("ethereum-config-") // config prefix for the db
 
@@ -123,6 +125,11 @@ func bloomBitsKey(bit uint, section uint64, hash common.Hash) []byte {
 	return key
 }
 
+// codeKey = codePrefix + hash
+func codeKey(hash common.Hash) []byte {
+	return append(codePrefix, hash.Bytes()...)
+}
+
 // preimageKey = preimagePrefix + hash
 func preimageKey(hash common.Hash) []byte {
 	return append(preimagePrefix, hash.Bytes()...)

core/state/database.go

@@ -17,10 +17,12 @@
 package state
 
 import (
+	"errors"
 	"fmt"
 	"sync"
 
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/rawdb"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/trie"
 	lru "github.com/hashicorp/golang-lru"
@@ -144,11 +146,11 @@ func (db *cachingDB) CopyTrie(t Trie) Trie {
 
 // ContractCode retrieves a particular contract's code.
 func (db *cachingDB) ContractCode(addrHash, codeHash common.Hash) ([]byte, error) {
-	code, err := db.db.Node(common.Hash{}, codeHash)
+	if code := rawdb.ReadCode(db.db.DiskDB().(ethdb.Database), codeHash); code != nil {
-	if err == nil {
 		db.codeSizeCache.Add(codeHash, len(code))
+		return code, nil
 	}
-	return code, err
+	return nil, errors.New("not found")
 }
 
 // ContractCodeSize retrieves a particular contracts code's size.

core/state/statedb.go

@@ -24,6 +24,7 @@ import (
 	"sort"
 
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/core/rawdb"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/ethereum/go-ethereum/ethdb"
@@ -636,7 +637,8 @@ func (s *StateDB) Commit(deleteEmptyObjects bool) (root common.Hash, err error)
 		case isDirty:
 			// Write any contract code associated with the state object
 			if stateObject.code != nil && stateObject.dirtyCode {
-				s.db.TrieDB().DiskDB().(ethdb.Database).Put(stateObject.CodeHash(), stateObject.code)
+				rawdb.WriteCode(s.db.TrieDB().DiskDB().(ethdb.Database), common.BytesToHash(stateObject.CodeHash()), stateObject.code)
+				//s.db.TrieDB().DiskDB().(ethdb.Database).Put(stateObject.CodeHash(), stateObject.code)
 				stateObject.dirtyCode = false
 			}
 			// Write any storage changes in the state object to its storage trie.

les/handler.go

@@ -631,7 +631,7 @@ func (pm *ProtocolManager) handleMsg(p *peer) error {
 					if err != nil {
 						continue
 					}
-					code, _ := statedb.Database().TrieDB().Node(common.Hash{}, common.BytesToHash(account.CodeHash)) // TODO(karalabe): make this work again
+					code := rawdb.ReadCode(pm.chainDb, common.BytesToHash(account.CodeHash))
 
 					data = append(data, code)
 					if bytes += len(code); bytes >= softResponseLimit {

trie/database.go

@@ -74,7 +74,7 @@ func makeNodeKey(owner common.Hash, hash common.Hash) string {
 	if owner == (common.Hash{}) {
 		return string(hash[:])
 	}
-	return string(append(owner[:], hash[:]...))
+	return string(append(hash[:], owner[:]...))
 }
 
 // splitNodeKey returns the composing hashes of a trie node key.
@@ -87,7 +87,7 @@ func splitNodeKey(key string) (common.Hash, common.Hash) {
 		return common.Hash{}, common.BytesToHash([]byte(key))
 
 	case 2 * common.HashLength:
-		return common.BytesToHash([]byte(key[:common.HashLength])), common.BytesToHash([]byte(key[common.HashLength:]))
+		return common.BytesToHash([]byte(key[common.HashLength:])), common.BytesToHash([]byte(key[:common.HashLength]))
 
 	default:
 		panic(fmt.Sprintf("invalid node key: %s", key))
@@ -432,18 +432,6 @@ func (db *Database) DiskDB() DatabaseReader {
 	return db.diskdb
 }
 
-// InsertBlob writes a new reference tracked blob to the memory database if it's
-// yet unknown. This method should only be used for non-trie nodes that require
-// reference counting, since trie nodes are garbage collected directly through
-// their embedded children.
-func (db *Database) InsertBlob(owner common.Hash, hash common.Hash, blob []byte) {
-	db.lock.Lock()
-	defer db.lock.Unlock()
-
-	db.DiskDB().(ethdb.Database).Put([]byte(makeNodeKey(owner, hash)), blob)
-	//db.insert(owner, hash, blob, rawNode(blob))
-}
-
 // insert inserts a collapsed trie node into the memory database. This method is
 // a more generic version of InsertBlob, supporting both raw blob insertions as
 // well ex trie node insertions. The blob must always be specified to allow proper
@@ -526,9 +514,7 @@ func (db *Database) node(owner common.Hash, hash common.Hash, cachegen uint16) n
 
 // Node retrieves an encoded cached trie node from memory. If it cannot be found
 // cached, the method queries the persistent database for the content.
-func (db *Database) Node(owner common.Hash, hash common.Hash) ([]byte, error) {
+func (db *Database) Node(hash common.Hash) ([]byte, error) {
-	key := makeNodeKey(owner, hash)
-
 	// Retrieve the node from the clean cache if available
 	if db.cleans != nil {
 		if enc, err := db.cleans.Get(string(hash[:])); err == nil && enc != nil {
@@ -537,7 +523,15 @@ func (db *Database) Node(owner common.Hash, hash common.Hash) ([]byte, error) {
 			return enc, nil
 		}
 	}
+	// TODO(karalabe): We need 2 new retrieval mechanisms:
+	//   - We need to retrieve from the dirty cache, needs some data struct extension (no owner)
+	//   - We need to retrieve from the database, needs prefix iteration support (just needs the interface ext)
+	//
+	// The code below is what's needed to work, just without the 'owner' being available
+	/*
 		// Retrieve the node from the dirty cache if available
+		key := makeNodeKey(owner, hash)
+
 		db.lock.RLock()
 		dirty := db.dirties[key]
 		db.lock.RUnlock()
@@ -555,6 +549,8 @@ func (db *Database) Node(owner common.Hash, hash common.Hash) ([]byte, error) {
 			}
 		}
 		return enc, err
+	*/
+	return nil, nil
 }
 
 // preimage retrieves a cached trie node pre-image from memory. If it cannot be