From 9db355154575bd7a7d38f0ee9ac4c410a7e31b40 Mon Sep 17 00:00:00 2001
From: zsfelfoldi <zsfelfoldi@gmail.com>
Date: Wed, 22 Jun 2016 02:37:38 +0200
Subject: [PATCH] filter 2

---
 eth/filters/api.go    | 16 +++++++++-------
 eth/filters/filter.go | 36 ++++++++++++++++++------------------
 2 files changed, 27 insertions(+), 25 deletions(-)

diff --git a/eth/filters/api.go b/eth/filters/api.go
index 869cafd937..b9783031fb 100644
--- a/eth/filters/api.go
+++ b/eth/filters/api.go
@@ -80,7 +80,7 @@ func NewPublicFilterAPI(apiBackend ethapi.Backend) *PublicFilterAPI {
 		apiBackend:       apiBackend,
 		mux:              apiBackend.EventMux(),
 		chainDb:          apiBackend.ChainDb(),
-		filterManager:    NewFilterSystem(mux),
+		filterManager:    NewFilterSystem(apiBackend.EventMux()),
 		filterMapping:    make(map[string]int),
 		logQueue:         make(map[int]*logQueue),
 		blockQueue:       make(map[int]*hashQueue),
@@ -434,14 +434,15 @@ func (s *PublicFilterAPI) NewFilter(args NewFilterArgs) (string, error) {
 }
 
 // GetLogs returns the logs matching the given argument.
-func (s *PublicFilterAPI) GetLogs(args NewFilterArgs) []vmlog {
+func (s *PublicFilterAPI) GetLogs(ctx context.Context, args NewFilterArgs) ([]vmlog, error) {
 	filter := New(s.apiBackend)
 	filter.SetBeginBlock(args.FromBlock.Int64())
 	filter.SetEndBlock(args.ToBlock.Int64())
 	filter.SetAddresses(args.Addresses)
 	filter.SetTopics(args.Topics)
 
-	return toRPCLogs(filter.Find(), false)
+	logs, err := filter.Find(ctx)
+	return toRPCLogs(logs, false), err
 }
 
 // UninstallFilter removes the filter with the given filter id.
@@ -527,17 +528,18 @@ func (s *PublicFilterAPI) logFilterChanged(id int) []vmlog {
 }
 
 // GetFilterLogs returns the logs for the filter with the given id.
-func (s *PublicFilterAPI) GetFilterLogs(filterId string) []vmlog {
+func (s *PublicFilterAPI) GetFilterLogs(ctx context.Context, filterId string) ([]vmlog, error) {
 	id, ok := s.filterMapping[filterId]
 	if !ok {
-		return toRPCLogs(nil, false)
+		return toRPCLogs(nil, false), nil
 	}
 
 	if filter := s.filterManager.Get(id); filter != nil {
-		return toRPCLogs(filter.Find(), false)
+		logs, err := filter.Find(ctx)
+		return toRPCLogs(logs, false), err
 	}
 
-	return toRPCLogs(nil, false)
+	return toRPCLogs(nil, false), nil
 }
 
 // GetFilterChanges returns the logs for the filter with the given id since last time is was called.
diff --git a/eth/filters/filter.go b/eth/filters/filter.go
index f57d375c66..b781c65458 100644
--- a/eth/filters/filter.go
+++ b/eth/filters/filter.go
@@ -17,16 +17,17 @@
 package filters
 
 import (
-	"math"
+//	"math"
 	"time"
 
 	"github.com/ethereum/go-ethereum/common"
-	"github.com/ethereum/go-ethereum/core"
+//	"github.com/ethereum/go-ethereum/core"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/ethdb"
 	"github.com/ethereum/go-ethereum/internal/ethapi"
 	"github.com/ethereum/go-ethereum/rpc"
+	"golang.org/x/net/context"
 )
 
 type AccountChange struct {
@@ -78,7 +79,7 @@ func (self *Filter) SetTopics(topics [][]common.Hash) {
 }
 
 // Run filters logs with the current parameters set
-func (self *Filter) Find() vm.Logs {
+func (self *Filter) Find(ctx context.Context) (vm.Logs, error) {
 	headBlockNumber := self.apiBackend.HeaderByNumber(rpc.LatestBlockNumber).Number.Uint64()
 	
 	var beginBlockNo uint64 = uint64(self.begin)
@@ -93,13 +94,13 @@ func (self *Filter) Find() vm.Logs {
 	// if no addresses are present we can't make use of fast search which
 	// uses the mipmap bloom filters to check for fast inclusion and uses
 	// higher range probability in order to ensure at least a false positive
-	if len(self.addresses) == 0 {
-		return self.getLogs(beginBlockNo, endBlockNo)
-	}
-	return self.mipFind(beginBlockNo, endBlockNo, 0)
+//	if len(self.addresses) == 0 {
+		return self.getLogs(ctx, beginBlockNo, endBlockNo)
+//	}
+//	return self.mipFind(beginBlockNo, endBlockNo, 0)
 }
 
-func (self *Filter) mipFind(start, end uint64, depth int) (logs vm.Logs) {
+/*func (self *Filter) mipFind(start, end uint64, depth int) (logs vm.Logs) {
 	level := core.MIPMapLevels[depth]
 	// normalise numerator so we can work in level specific batches and
 	// work with the proper range checks
@@ -127,25 +128,24 @@ func (self *Filter) mipFind(start, end uint64, depth int) (logs vm.Logs) {
 	}
 
 	return logs
-}
-
-func (self *Filter) getLogs(start, end uint64) (logs vm.Logs) {
-	var block *types.Block
+}*/
 
+func (self *Filter) getLogs(ctx context.Context, start, end uint64) (logs vm.Logs, err error) {
 	for i := start; i <= end; i++ {
 		header := self.apiBackend.HeaderByNumber(rpc.BlockNumber(i))
 		if header == nil {
-			return logs
+			return logs, nil
 		}
 
 		// Use bloom filtering to see if this block is interesting given the
 		// current parameters
 		if self.bloomFilter(header.Bloom) {
 			// Get the logs of the block
-			var (
-				receipts   = self.apiBackend.GetReceipts(ctx, header.Hash())
-				unfiltered vm.Logs
-			)
+			receipts, err := self.apiBackend.GetReceipts(ctx, header.Hash())
+			if err != nil {
+				return nil, err
+			}
+			var 	unfiltered vm.Logs
 			for _, receipt := range receipts {
 				unfiltered = append(unfiltered, receipt.Logs...)
 			}
@@ -153,7 +153,7 @@ func (self *Filter) getLogs(start, end uint64) (logs vm.Logs) {
 		}
 	}
 
-	return logs
+	return logs, nil
 }
 
 func includes(addresses []common.Address, a common.Address) bool {