...

37 files changed, 2972 insertions, 1686 deletions

diff --git a/eth/api.go b/eth/api.go
index 97a0758..b64090e 100644
--- a/eth/api.go
+++ b/eth/api.go
@@ -29,13 +29,13 @@ import (
 	"time"
 
 	"github.com/ava-labs/coreth/core"
+	"github.com/ava-labs/coreth/core/rawdb"
+	"github.com/ava-labs/coreth/core/state"
+	"github.com/ava-labs/coreth/core/types"
 	"github.com/ava-labs/coreth/internal/ethapi"
 	"github.com/ava-labs/coreth/rpc"
 	"github.com/ava-labs/go-ethereum/common"
 	"github.com/ava-labs/go-ethereum/common/hexutil"
-	"github.com/ava-labs/go-ethereum/core/rawdb"
-	"github.com/ava-labs/go-ethereum/core/state"
-	"github.com/ava-labs/go-ethereum/core/types"
 	"github.com/ava-labs/go-ethereum/rlp"
 	"github.com/ava-labs/go-ethereum/trie"
 )
diff --git a/eth/api_backend.go b/eth/api_backend.go
index c4ec8f0..1ca7b94 100644
--- a/eth/api_backend.go
+++ b/eth/api_backend.go
@@ -21,22 +21,21 @@ import (
 	"errors"
 	"math/big"
 
+	"github.com/ava-labs/coreth/accounts"
 	"github.com/ava-labs/coreth/core"
+	"github.com/ava-labs/coreth/core/bloombits"
+	"github.com/ava-labs/coreth/core/rawdb"
+	"github.com/ava-labs/coreth/core/state"
+	"github.com/ava-labs/coreth/core/types"
+	"github.com/ava-labs/coreth/core/vm"
 	"github.com/ava-labs/coreth/eth/gasprice"
+	"github.com/ava-labs/coreth/params"
 	"github.com/ava-labs/coreth/rpc"
-	"github.com/ava-labs/go-ethereum/accounts"
 	"github.com/ava-labs/go-ethereum/common"
 	"github.com/ava-labs/go-ethereum/common/math"
-	ethcore "github.com/ava-labs/go-ethereum/core"
-	"github.com/ava-labs/go-ethereum/core/bloombits"
-	"github.com/ava-labs/go-ethereum/core/rawdb"
-	"github.com/ava-labs/go-ethereum/core/state"
-	"github.com/ava-labs/go-ethereum/core/types"
-	"github.com/ava-labs/go-ethereum/core/vm"
 	"github.com/ava-labs/go-ethereum/eth/downloader"
 	"github.com/ava-labs/go-ethereum/ethdb"
 	"github.com/ava-labs/go-ethereum/event"
-	"github.com/ava-labs/go-ethereum/params"
 )
 
 // EthAPIBackend implements ethapi.Backend for full nodes
@@ -60,7 +59,7 @@ func (b *EthAPIBackend) AcceptedBlock() *types.Block {
 }
 
 func (b *EthAPIBackend) SetHead(number uint64) {
-	b.eth.protocolManager.downloader.Cancel()
+	//b.eth.protocolManager.downloader.Cancel()
 	b.eth.blockchain.SetHead(number)
 }
 
@@ -142,7 +141,7 @@ func (b *EthAPIBackend) GetTd(blockHash common.Hash) *big.Int {
 	return b.eth.blockchain.GetTdByHash(blockHash)
 }
 
-func (b *EthAPIBackend) GetEVM(ctx context.Context, msg ethcore.Message, state *state.StateDB, header *types.Header) (*vm.EVM, func() error, error) {
+func (b *EthAPIBackend) GetEVM(ctx context.Context, msg core.Message, state *state.StateDB, header *types.Header) (*vm.EVM, func() error, error) {
 	state.SetBalance(msg.From(), math.MaxBig256)
 	vmError := func() error { return nil }
 
diff --git a/eth/api_tracer.go b/eth/api_tracer.go
index b87a9fe..c8a5307 100644
--- a/eth/api_tracer.go
+++ b/eth/api_tracer.go
@@ -28,19 +28,18 @@ import (
 	"sync"
 	"time"
 
+	"github.com/ava-labs/coreth/core"
+	"github.com/ava-labs/coreth/core/rawdb"
+	"github.com/ava-labs/coreth/core/state"
+	"github.com/ava-labs/coreth/core/types"
+	"github.com/ava-labs/coreth/core/vm"
+	"github.com/ava-labs/coreth/eth/tracers"
 	"github.com/ava-labs/coreth/internal/ethapi"
-	myrpc "github.com/ava-labs/coreth/rpc"
+	"github.com/ava-labs/coreth/rpc"
 	"github.com/ava-labs/go-ethereum/common"
 	"github.com/ava-labs/go-ethereum/common/hexutil"
-	"github.com/ava-labs/go-ethereum/core"
-	"github.com/ava-labs/go-ethereum/core/rawdb"
-	"github.com/ava-labs/go-ethereum/core/state"
-	"github.com/ava-labs/go-ethereum/core/types"
-	"github.com/ava-labs/go-ethereum/core/vm"
-	"github.com/ava-labs/go-ethereum/eth/tracers"
 	"github.com/ava-labs/go-ethereum/log"
 	"github.com/ava-labs/go-ethereum/rlp"
-	"github.com/ava-labs/go-ethereum/rpc"
 	"github.com/ava-labs/go-ethereum/trie"
 )
 
@@ -102,26 +101,26 @@ type txTraceTask struct {
 
 // TraceChain returns the structured logs created during the execution of EVM
 // between two blocks (excluding start) and returns them as a JSON object.
-func (api *PrivateDebugAPI) TraceChain(ctx context.Context, start, end myrpc.BlockNumber, config *TraceConfig) (*rpc.Subscription, error) {
+func (api *PrivateDebugAPI) TraceChain(ctx context.Context, start, end rpc.BlockNumber, config *TraceConfig) (*rpc.Subscription, error) {
 	// Fetch the block interval that we want to trace
 	var from, to *types.Block
 
 	switch start {
-	case myrpc.PendingBlockNumber:
+	case rpc.PendingBlockNumber:
 		from = api.eth.miner.PendingBlock()
-	case myrpc.LatestBlockNumber:
+	case rpc.LatestBlockNumber:
 		from = api.eth.blockchain.CurrentBlock()
-	case myrpc.AcceptedBlockNumber:
+	case rpc.AcceptedBlockNumber:
 		from = api.eth.AcceptedBlock()
 	default:
 		from = api.eth.blockchain.GetBlockByNumber(uint64(start))
 	}
 	switch end {
-	case myrpc.PendingBlockNumber:
+	case rpc.PendingBlockNumber:
 		to = api.eth.miner.PendingBlock()
-	case myrpc.LatestBlockNumber:
+	case rpc.LatestBlockNumber:
 		to = api.eth.blockchain.CurrentBlock()
-	case myrpc.AcceptedBlockNumber:
+	case rpc.AcceptedBlockNumber:
 		from = api.eth.AcceptedBlock()
 	default:
 		to = api.eth.blockchain.GetBlockByNumber(uint64(end))
@@ -357,16 +356,16 @@ func (api *PrivateDebugAPI) traceChain(ctx context.Context, start, end *types.Bl
 
 // TraceBlockByNumber returns the structured logs created during the execution of
 // EVM and returns them as a JSON object.
-func (api *PrivateDebugAPI) TraceBlockByNumber(ctx context.Context, number myrpc.BlockNumber, config *TraceConfig) ([]*txTraceResult, error) {
+func (api *PrivateDebugAPI) TraceBlockByNumber(ctx context.Context, number rpc.BlockNumber, config *TraceConfig) ([]*txTraceResult, error) {
 	// Fetch the block that we want to trace
 	var block *types.Block
 
 	switch number {
-	case myrpc.PendingBlockNumber:
+	case rpc.PendingBlockNumber:
 		block = api.eth.miner.PendingBlock()
-	case myrpc.LatestBlockNumber:
+	case rpc.LatestBlockNumber:
 		block = api.eth.blockchain.CurrentBlock()
-	case myrpc.AcceptedBlockNumber:
+	case rpc.AcceptedBlockNumber:
 		block = api.eth.AcceptedBlock()
 	default:
 		block = api.eth.blockchain.GetBlockByNumber(uint64(number))
diff --git a/eth/backend.go b/eth/backend.go
index 6d052e2..983909c 100644
--- a/eth/backend.go
+++ b/eth/backend.go
@@ -23,36 +23,34 @@ import (
 	"math/big"
 	"runtime"
 	"sync"
-	"sync/atomic"
+	//"sync/atomic"
 
+	"github.com/ava-labs/coreth/accounts"
+	"github.com/ava-labs/coreth/accounts/abi/bind"
+	"github.com/ava-labs/coreth/consensus"
+	"github.com/ava-labs/coreth/consensus/clique"
 	"github.com/ava-labs/coreth/consensus/dummy"
+	"github.com/ava-labs/coreth/consensus/ethash"
 	"github.com/ava-labs/coreth/core"
+	"github.com/ava-labs/coreth/core/bloombits"
+	"github.com/ava-labs/coreth/core/rawdb"
+	"github.com/ava-labs/coreth/core/types"
+	"github.com/ava-labs/coreth/core/vm"
 	"github.com/ava-labs/coreth/eth/filters"
 	"github.com/ava-labs/coreth/eth/gasprice"
 	"github.com/ava-labs/coreth/internal/ethapi"
 	"github.com/ava-labs/coreth/miner"
 	"github.com/ava-labs/coreth/node"
-	myparams "github.com/ava-labs/coreth/params"
-	"github.com/ava-labs/go-ethereum/accounts"
-	"github.com/ava-labs/go-ethereum/accounts/abi/bind"
+	"github.com/ava-labs/coreth/params"
+	"github.com/ava-labs/coreth/rpc"
 	"github.com/ava-labs/go-ethereum/common"
 	"github.com/ava-labs/go-ethereum/common/hexutil"
-	"github.com/ava-labs/go-ethereum/consensus"
-	"github.com/ava-labs/go-ethereum/consensus/clique"
-	"github.com/ava-labs/go-ethereum/consensus/ethash"
-	"github.com/ava-labs/go-ethereum/core/bloombits"
-	"github.com/ava-labs/go-ethereum/core/rawdb"
-	"github.com/ava-labs/go-ethereum/core/types"
-	"github.com/ava-labs/go-ethereum/core/vm"
 	"github.com/ava-labs/go-ethereum/eth/downloader"
 	"github.com/ava-labs/go-ethereum/ethdb"
 	"github.com/ava-labs/go-ethereum/event"
 	"github.com/ava-labs/go-ethereum/log"
 	"github.com/ava-labs/go-ethereum/p2p"
-	//"github.com/ava-labs/go-ethereum/p2p/enr"
-	"github.com/ava-labs/go-ethereum/params"
 	"github.com/ava-labs/go-ethereum/rlp"
-	"github.com/ava-labs/go-ethereum/rpc"
 )
 
 type LesServer interface {
@@ -78,10 +76,10 @@ type Ethereum struct {
 	server *p2p.Server
 
 	// Handlers
-	txPool          *core.TxPool
-	blockchain      *core.BlockChain
-	protocolManager *ProtocolManager
-	lesServer       LesServer
+	txPool     *core.TxPool
+	blockchain *core.BlockChain
+	//protocolManager *ProtocolManager
+	lesServer LesServer
 
 	// DB interfaces
 	chainDb ethdb.Database // Block chain database
@@ -253,8 +251,8 @@ func makeExtraData(extra []byte) []byte {
 			runtime.GOOS,
 		})
 	}
-	if uint64(len(extra)) > myparams.MaximumExtraDataSize {
-		log.Warn("Miner extra data exceed limit", "extra", hexutil.Bytes(extra), "limit", myparams.MaximumExtraDataSize)
+	if uint64(len(extra)) > params.MaximumExtraDataSize {
+		log.Warn("Miner extra data exceed limit", "extra", hexutil.Bytes(extra), "limit", params.MaximumExtraDataSize)
 		extra = nil
 	}
 	return extra
@@ -486,8 +484,8 @@ func (s *Ethereum) ChainDb() ethdb.Database            { return s.chainDb }
 func (s *Ethereum) IsListening() bool                  { return true } // Always listening
 func (s *Ethereum) EthVersion() int                    { return int(ProtocolVersions[0]) }
 func (s *Ethereum) NetVersion() uint64                 { return s.networkID }
-func (s *Ethereum) Downloader() *downloader.Downloader { return s.protocolManager.downloader }
-func (s *Ethereum) Synced() bool                       { return atomic.LoadUint32(&s.protocolManager.acceptTxs) == 1 }
+func (s *Ethereum) Downloader() *downloader.Downloader { return nil }  // s.protocolManager.downloader }
+func (s *Ethereum) Synced() bool                       { return true } // atomic.LoadUint32(&s.protocolManager.acceptTxs) == 1 }
 func (s *Ethereum) ArchiveMode() bool                  { return s.config.NoPruning }
 
 // Protocols implements node.Service, returning all the currently configured
diff --git a/eth/bloombits.go b/eth/bloombits.go
index e4792bb..7136c29 100644
--- a/eth/bloombits.go
+++ b/eth/bloombits.go
@@ -21,11 +21,11 @@ import (
 	"time"
 
 	"github.com/ava-labs/coreth/core"
+	"github.com/ava-labs/coreth/core/bloombits"
+	"github.com/ava-labs/coreth/core/rawdb"
+	"github.com/ava-labs/coreth/core/types"
 	"github.com/ava-labs/go-ethereum/common"
 	"github.com/ava-labs/go-ethereum/common/bitutil"
-	"github.com/ava-labs/go-ethereum/core/bloombits"
-	"github.com/ava-labs/go-ethereum/core/rawdb"
-	"github.com/ava-labs/go-ethereum/core/types"
 	"github.com/ava-labs/go-ethereum/ethdb"
 )
 
diff --git a/eth/config.go b/eth/config.go
index ee0fdb7..18dbd8e 100644
--- a/eth/config.go
+++ b/eth/config.go
@@ -25,14 +25,14 @@ import (
 	"runtime"
 	"time"
 
+	"github.com/ava-labs/coreth/consensus/ethash"
 	"github.com/ava-labs/coreth/core"
 	"github.com/ava-labs/coreth/eth/gasprice"
 	"github.com/ava-labs/coreth/miner"
+	"github.com/ava-labs/coreth/params"
 	"github.com/ava-labs/go-ethereum/common"
 	"github.com/ava-labs/go-ethereum/common/hexutil"
-	"github.com/ava-labs/go-ethereum/consensus/ethash"
 	"github.com/ava-labs/go-ethereum/eth/downloader"
-	"github.com/ava-labs/go-ethereum/params"
 )
 
 // DefaultConfig contains default settings for use on the Ethereum main net.
diff --git a/eth/filters/api.go b/eth/filters/api.go
index 9d9e757..a1d0b21 100644
--- a/eth/filters/api.go
+++ b/eth/filters/api.go
@@ -25,13 +25,13 @@ import (
 	"sync"
 	"time"
 
+	"github.com/ava-labs/coreth/core/types"
+	"github.com/ava-labs/coreth/rpc"
 	ethereum "github.com/ava-labs/go-ethereum"
 	"github.com/ava-labs/go-ethereum/common"
 	"github.com/ava-labs/go-ethereum/common/hexutil"
-	"github.com/ava-labs/go-ethereum/core/types"
 	"github.com/ava-labs/go-ethereum/ethdb"
 	"github.com/ava-labs/go-ethereum/event"
-	"github.com/ava-labs/go-ethereum/rpc"
 )
 
 var (
diff --git a/eth/filters/filter.go b/eth/filters/filter.go
index b25792c..3e133d4 100644
--- a/eth/filters/filter.go
+++ b/eth/filters/filter.go
@@ -22,10 +22,10 @@ import (
 	"math/big"
 
 	"github.com/ava-labs/coreth/core"
+	"github.com/ava-labs/coreth/core/bloombits"
+	"github.com/ava-labs/coreth/core/types"
 	"github.com/ava-labs/coreth/rpc"
 	"github.com/ava-labs/go-ethereum/common"
-	"github.com/ava-labs/go-ethereum/core/bloombits"
-	"github.com/ava-labs/go-ethereum/core/types"
 	"github.com/ava-labs/go-ethereum/ethdb"
 	"github.com/ava-labs/go-ethereum/event"
 )
diff --git a/eth/filters/filter_system.go b/eth/filters/filter_system.go
index f8ee038..41427c7 100644
--- a/eth/filters/filter_system.go
+++ b/eth/filters/filter_system.go
@@ -26,14 +26,13 @@ import (
 	"time"
 
 	"github.com/ava-labs/coreth/core"
-	myrpc "github.com/ava-labs/coreth/rpc"
+	"github.com/ava-labs/coreth/core/rawdb"
+	"github.com/ava-labs/coreth/core/types"
+	"github.com/ava-labs/coreth/rpc"
 	ethereum "github.com/ava-labs/go-ethereum"
 	"github.com/ava-labs/go-ethereum/common"
-	"github.com/ava-labs/go-ethereum/core/rawdb"
-	"github.com/ava-labs/go-ethereum/core/types"
 	"github.com/ava-labs/go-ethereum/event"
 	"github.com/ava-labs/go-ethereum/log"
-	"github.com/ava-labs/go-ethereum/rpc"
 )
 
 // Type determines the kind of filter and is used to put the filter in to
@@ -197,24 +196,24 @@ func (es *EventSystem) subscribe(sub *subscription) *Subscription {
 // given criteria to the given logs channel. Default value for the from and to
 // block is "latest". If the fromBlock > toBlock an error is returned.
 func (es *EventSystem) SubscribeLogs(crit ethereum.FilterQuery, logs chan []*types.Log) (*Subscription, error) {
-	var from, to myrpc.BlockNumber
+	var from, to rpc.BlockNumber
 	if crit.FromBlock == nil {
-		from = myrpc.LatestBlockNumber
+		from = rpc.LatestBlockNumber
 	} else {
-		from = myrpc.BlockNumber(crit.FromBlock.Int64())
+		from = rpc.BlockNumber(crit.FromBlock.Int64())
 	}
 	if crit.ToBlock == nil {
-		to = myrpc.LatestBlockNumber
+		to = rpc.LatestBlockNumber
 	} else {
-		to = myrpc.BlockNumber(crit.ToBlock.Int64())
+		to = rpc.BlockNumber(crit.ToBlock.Int64())
 	}
 
 	// only interested in pending logs
-	if from == myrpc.PendingBlockNumber && to == myrpc.PendingBlockNumber {
+	if from == rpc.PendingBlockNumber && to == rpc.PendingBlockNumber {
 		return es.subscribePendingLogs(crit, logs), nil
 	}
 	// only interested in new mined logs
-	if from == myrpc.LatestBlockNumber && to == myrpc.LatestBlockNumber {
+	if from == rpc.LatestBlockNumber && to == rpc.LatestBlockNumber {
 		return es.subscribeLogs(crit, logs), nil
 	}
 	// only interested in mined logs within a specific block range
@@ -222,11 +221,11 @@ func (es *EventSystem) SubscribeLogs(crit ethereum.FilterQuery, logs chan []*typ
 		return es.subscribeLogs(crit, logs), nil
 	}
 	// interested in mined logs from a specific block number, new logs and pending logs
-	if from >= myrpc.LatestBlockNumber && to == myrpc.PendingBlockNumber {
+	if from >= rpc.LatestBlockNumber && to == rpc.PendingBlockNumber {
 		return es.subscribeMinedPendingLogs(crit, logs), nil
 	}
 	// interested in logs from a specific block number to new mined blocks
-	if from >= 0 && to == myrpc.LatestBlockNumber {
+	if from >= 0 && to == rpc.LatestBlockNumber {
 		return es.subscribeLogs(crit, logs), nil
 	}
 	return nil, fmt.Errorf("invalid from and to block combination: from > to")
diff --git a/eth/gasprice/gasprice.go b/eth/gasprice/gasprice.go
index 9b632c2..23e49a6 100644
--- a/eth/gasprice/gasprice.go
+++ b/eth/gasprice/gasprice.go
@@ -22,11 +22,11 @@ import (
 	"sort"
 	"sync"
 
+	"github.com/ava-labs/coreth/core/types"
 	"github.com/ava-labs/coreth/internal/ethapi"
 	"github.com/ava-labs/coreth/params"
 	"github.com/ava-labs/coreth/rpc"
 	"github.com/ava-labs/go-ethereum/common"
-	"github.com/ava-labs/go-ethereum/core/types"
 )
 
 var maxPrice = big.NewInt(500 * params.GWei)
diff --git a/eth/gen_config.go b/eth/gen_config.go
index 6b8ddf1..617a885 100644
--- a/eth/gen_config.go
+++ b/eth/gen_config.go
@@ -6,13 +6,13 @@ import (
 	"math/big"
 	"time"
 
+	"github.com/ava-labs/coreth/consensus/ethash"
 	"github.com/ava-labs/coreth/core"
 	"github.com/ava-labs/coreth/eth/gasprice"
 	"github.com/ava-labs/coreth/miner"
+	"github.com/ava-labs/coreth/params"
 	"github.com/ava-labs/go-ethereum/common"
-	"github.com/ava-labs/go-ethereum/consensus/ethash"
 	"github.com/ava-labs/go-ethereum/eth/downloader"
-	"github.com/ava-labs/go-ethereum/params"
 )
 
 // MarshalTOML marshals as TOML.
diff --git a/eth/handler.go b/eth/handler.go
deleted file mode 100644
index f502973..0000000
--- a/eth/handler.go
+++ /dev/null
@@ -1,844 +0,0 @@
-// Copyright 2015 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 eth
-
-import (
-	"encoding/json"
-	"errors"
-	"fmt"
-	"math"
-	"math/big"
-	"sync"
-	"sync/atomic"
-	"time"
-
-	"github.com/ava-labs/coreth/core"
-	"github.com/ava-labs/go-ethereum/common"
-	"github.com/ava-labs/go-ethereum/consensus"
-	"github.com/ava-labs/go-ethereum/core/types"
-	"github.com/ava-labs/go-ethereum/eth/downloader"
-	"github.com/ava-labs/go-ethereum/eth/fetcher"
-	"github.com/ava-labs/go-ethereum/ethdb"
-	"github.com/ava-labs/go-ethereum/event"
-	"github.com/ava-labs/go-ethereum/log"
-	"github.com/ava-labs/go-ethereum/p2p"
-	"github.com/ava-labs/go-ethereum/p2p/enode"
-	"github.com/ava-labs/go-ethereum/params"
-	"github.com/ava-labs/go-ethereum/rlp"
-	"github.com/ava-labs/go-ethereum/trie"
-)
-
-const (
-	softResponseLimit = 2 * 1024 * 1024 // Target maximum size of returned blocks, headers or node data.
-	estHeaderRlpSize  = 500             // Approximate size of an RLP encoded block header
-
-	// txChanSize is the size of channel listening to NewTxsEvent.
-	// The number is referenced from the size of tx pool.
-	txChanSize = 4096
-
-	// minimim number of peers to broadcast new blocks to
-	minBroadcastPeers = 4
-)
-
-var (
-	syncChallengeTimeout = 15 * time.Second // Time allowance for a node to reply to the sync progress challenge
-)
-
-func errResp(code errCode, format string, v ...interface{}) error {
-	return fmt.Errorf("%v - %v", code, fmt.Sprintf(format, v...))
-}
-
-type ProtocolManager struct {
-	networkID uint64
-
-	fastSync  uint32 // Flag whether fast sync is enabled (gets disabled if we already have blocks)
-	acceptTxs uint32 // Flag whether we're considered synchronised (enables transaction processing)
-
-	checkpointNumber uint64      // Block number for the sync progress validator to cross reference
-	checkpointHash   common.Hash // Block hash for the sync progress validator to cross reference
-
-	txpool     txPool
-	blockchain *core.BlockChain
-	maxPeers   int
-
-	downloader *downloader.Downloader
-	fetcher    *fetcher.Fetcher
-	peers      *peerSet
-
-	eventMux      *event.TypeMux
-	txsCh         chan core.NewTxsEvent
-	txsSub        event.Subscription
-	minedBlockSub *event.TypeMuxSubscription
-
-	whitelist map[uint64]common.Hash
-
-	// channels for fetcher, syncer, txsyncLoop
-	newPeerCh   chan *peer
-	txsyncCh    chan *txsync
-	quitSync    chan struct{}
-	noMorePeers chan struct{}
-
-	// wait group is used for graceful shutdowns during downloading
-	// and processing
-	wg sync.WaitGroup
-}
-
-// NewProtocolManager returns a new Ethereum sub protocol manager. The Ethereum sub protocol manages peers capable
-// with the Ethereum network.
-func NewProtocolManager(config *params.ChainConfig, checkpoint *params.TrustedCheckpoint, mode downloader.SyncMode, networkID uint64, mux *event.TypeMux, txpool txPool, engine consensus.Engine, blockchain *core.BlockChain, chaindb ethdb.Database, cacheLimit int, whitelist map[uint64]common.Hash) (*ProtocolManager, error) {
-	// Create the protocol manager with the base fields
-	manager := &ProtocolManager{
-		networkID:   networkID,
-		eventMux:    mux,
-		txpool:      txpool,
-		blockchain:  blockchain,
-		peers:       newPeerSet(),
-		whitelist:   whitelist,
-		newPeerCh:   make(chan *peer),
-		noMorePeers: make(chan struct{}),
-		txsyncCh:    make(chan *txsync),
-		quitSync:    make(chan struct{}),
-	}
-	if mode == downloader.FullSync {
-		// The database seems empty as the current block is the genesis. Yet the fast
-		// block is ahead, so fast sync was enabled for this node at a certain point.
-		// The scenarios where this can happen is
-		// * if the user manually (or via a bad block) rolled back a fast sync node
-		//   below the sync point.
-		// * the last fast sync is not finished while user specifies a full sync this
-		//   time. But we don't have any recent state for full sync.
-		// In these cases however it's safe to reenable fast sync.
-		fullBlock, fastBlock := blockchain.CurrentBlock(), blockchain.CurrentFastBlock()
-		if fullBlock.NumberU64() == 0 && fastBlock.NumberU64() > 0 {
-			manager.fastSync = uint32(1)
-			log.Warn("Switch sync mode from full sync to fast sync")
-		}
-	} else {
-		if blockchain.CurrentBlock().NumberU64() > 0 {
-			// Print warning log if database is not empty to run fast sync.
-			log.Warn("Switch sync mode from fast sync to full sync")
-		} else {
-			// If fast sync was requested and our database is empty, grant it
-			manager.fastSync = uint32(1)
-		}
-	}
-	// If we have trusted checkpoints, enforce them on the chain
-	if checkpoint != nil {
-		manager.checkpointNumber = (checkpoint.SectionIndex+1)*params.CHTFrequency - 1
-		manager.checkpointHash = checkpoint.SectionHead
-	}
-
-	// Construct the downloader (long sync) and its backing state bloom if fast
-	// sync is requested. The downloader is responsible for deallocating the state
-	// bloom when it's done.
-	var stateBloom *trie.SyncBloom
-	if atomic.LoadUint32(&manager.fastSync) == 1 {
-		stateBloom = trie.NewSyncBloom(uint64(cacheLimit), chaindb)
-	}
-	manager.downloader = downloader.New(manager.checkpointNumber, chaindb, stateBloom, manager.eventMux, blockchain, nil, manager.removePeer)
-
-	// Construct the fetcher (short sync)
-	validator := func(header *types.Header) error {
-		return engine.VerifyHeader(blockchain, header, true)
-	}
-	heighter := func() uint64 {
-		return blockchain.CurrentBlock().NumberU64()
-	}
-	inserter := func(blocks types.Blocks) (int, error) {
-		// If sync hasn't reached the checkpoint yet, deny importing weird blocks.
-		//
-		// Ideally we would also compare the head block's timestamp and similarly reject
-		// the propagated block if the head is too old. Unfortunately there is a corner
-		// case when starting new networks, where the genesis might be ancient (0 unix)
-		// which would prevent full nodes from accepting it.
-		if manager.blockchain.CurrentBlock().NumberU64() < manager.checkpointNumber {
-			log.Warn("Unsynced yet, discarded propagated block", "number", blocks[0].Number(), "hash", blocks[0].Hash())
-			return 0, nil
-		}
-		// If fast sync is running, deny importing weird blocks. This is a problematic
-		// clause when starting up a new network, because fast-syncing miners might not
-		// accept each others' blocks until a restart. Unfortunately we haven't figured
-		// out a way yet where nodes can decide unilaterally whether the network is new
-		// or not. This should be fixed if we figure out a solution.
-		if atomic.LoadUint32(&manager.fastSync) == 1 {
-			log.Warn("Fast syncing, discarded propagated block", "number", blocks[0].Number(), "hash", blocks[0].Hash())
-			return 0, nil
-		}
-		n, err := manager.blockchain.InsertChain(blocks)
-		if err == nil {
-			atomic.StoreUint32(&manager.acceptTxs, 1) // Mark initial sync done on any fetcher import
-		}
-		return n, err
-	}
-	manager.fetcher = fetcher.New(blockchain.GetBlockByHash, validator, manager.BroadcastBlock, heighter, inserter, manager.removePeer)
-
-	return manager, nil
-}
-
-func (pm *ProtocolManager) makeProtocol(version uint) p2p.Protocol {
-	length, ok := protocolLengths[version]
-	if !ok {
-		panic("makeProtocol for unknown version")
-	}
-
-	return p2p.Protocol{
-		Name:    protocolName,
-		Version: version,
-		Length:  length,
-		Run: func(p *p2p.Peer, rw p2p.MsgReadWriter) error {
-			peer := pm.newPeer(int(version), p, rw)
-			select {
-			case pm.newPeerCh <- peer:
-				pm.wg.Add(1)
-				defer pm.wg.Done()
-				return pm.handle(peer)
-			case <-pm.quitSync:
-				return p2p.DiscQuitting
-			}
-		},
-		NodeInfo: func() interface{} {
-			return pm.NodeInfo()
-		},
-		PeerInfo: func(id enode.ID) interface{} {
-			if p := pm.peers.Peer(fmt.Sprintf("%x", id[:8])); p != nil {
-				return p.Info()
-			}
-			return nil
-		},
-	}
-}
-
-func (pm *ProtocolManager) removePeer(id string) {
-	// Short circuit if the peer was already removed
-	peer := pm.peers.Peer(id)
-	if peer == nil {
-		return
-	}
-	log.Debug("Removing Ethereum peer", "peer", id)
-
-	// Unregister the peer from the downloader and Ethereum peer set
-	pm.downloader.UnregisterPeer(id)
-	if err := pm.peers.Unregister(id); err != nil {
-		log.Error("Peer removal failed", "peer", id, "err", err)
-	}
-	// Hard disconnect at the networking layer
-	if peer != nil {
-		peer.Peer.Disconnect(p2p.DiscUselessPeer)
-	}
-}
-
-func (pm *ProtocolManager) Start(maxPeers int) {
-	pm.maxPeers = maxPeers
-
-	// broadcast transactions
-	pm.txsCh = make(chan core.NewTxsEvent, txChanSize)
-	pm.txsSub = pm.txpool.SubscribeNewTxsEvent(pm.txsCh)
-	go pm.txBroadcastLoop()
-
-	// broadcast mined blocks
-	pm.minedBlockSub = pm.eventMux.Subscribe(core.NewMinedBlockEvent{})
-	go pm.minedBroadcastLoop()
-
-	// start sync handlers
-	go pm.syncer()
-	go pm.txsyncLoop()
-}
-
-func (pm *ProtocolManager) Stop() {
-	log.Info("Stopping Ethereum protocol")
-
-	pm.txsSub.Unsubscribe()        // quits txBroadcastLoop
-	pm.minedBlockSub.Unsubscribe() // quits blockBroadcastLoop
-
-	// Quit the sync loop.
-	// After this send has completed, no new peers will be accepted.
-	pm.noMorePeers <- struct{}{}
-
-	// Quit fetcher, txsyncLoop.
-	close(pm.quitSync)
-
-	// Disconnect existing sessions.
-	// This also closes the gate for any new registrations on the peer set.
-	// sessions which are already established but not added to pm.peers yet
-	// will exit when they try to register.
-	pm.peers.Close()
-
-	// Wait for all peer handler goroutines and the loops to come down.
-	pm.wg.Wait()
-
-	log.Info("Ethereum protocol stopped")
-}
-
-func (pm *ProtocolManager) newPeer(pv int, p *p2p.Peer, rw p2p.MsgReadWriter) *peer {
-	return newPeer(pv, p, newMeteredMsgWriter(rw))
-}
-
-// handle is the callback invoked to manage the life cycle of an eth peer. When
-// this function terminates, the peer is disconnected.
-func (pm *ProtocolManager) handle(p *peer) error {
-	// Ignore maxPeers if this is a trusted peer
-	if pm.peers.Len() >= pm.maxPeers && !p.Peer.Info().Network.Trusted {
-		return p2p.DiscTooManyPeers
-	}
-	p.Log().Debug("Ethereum peer connected", "name", p.Name())
-
-	// Execute the Ethereum handshake
-	var (
-		genesis = pm.blockchain.Genesis()
-		head    = pm.blockchain.CurrentHeader()
-		hash    = head.Hash()
-		number  = head.Number.Uint64()
-		td      = pm.blockchain.GetTd(hash, number)
-	)
-	if err := p.Handshake(pm.networkID, td, hash, genesis.Hash()); err != nil {
-		p.Log().Debug("Ethereum handshake failed", "err", err)
-		return err
-	}
-	if rw, ok := p.rw.(*meteredMsgReadWriter); ok {
-		rw.Init(p.version)
-	}
-	// Register the peer locally
-	if err := pm.peers.Register(p); err != nil {
-		p.Log().Error("Ethereum peer registration failed", "err", err)
-		return err
-	}
-	defer pm.removePeer(p.id)
-
-	// Register the peer in the downloader. If the downloader considers it banned, we disconnect
-	if err := pm.downloader.RegisterPeer(p.id, p.version, p); err != nil {
-		return err
-	}
-	// Propagate existing transactions. new transactions appearing
-	// after this will be sent via broadcasts.
-	pm.syncTransactions(p)
-
-	// If we have a trusted CHT, reject all peers below that (avoid fast sync eclipse)
-	if pm.checkpointHash != (common.Hash{}) {
-		// Request the peer's checkpoint header for chain height/weight validation
-		if err := p.RequestHeadersByNumber(pm.checkpointNumber, 1, 0, false); err != nil {
-			return err
-		}
-		// Start a timer to disconnect if the peer doesn't reply in time
-		p.syncDrop = time.AfterFunc(syncChallengeTimeout, func() {
-			p.Log().Warn("Checkpoint challenge timed out, dropping", "addr", p.RemoteAddr(), "type", p.Name())
-			pm.removePeer(p.id)
-		})
-		// Make sure it's cleaned up if the peer dies off
-		defer func() {
-			if p.syncDrop != nil {
-				p.syncDrop.Stop()
-				p.syncDrop = nil
-			}
-		}()
-	}
-	// If we have any explicit whitelist block hashes, request them
-	for number := range pm.whitelist {
-		if err := p.RequestHeadersByNumber(number, 1, 0, false); err != nil {
-			return err
-		}
-	}
-	// Handle incoming messages until the connection is torn down
-	for {
-		if err := pm.handleMsg(p); err != nil {
-			p.Log().Debug("Ethereum message handling failed", "err", err)
-			return err
-		}
-	}
-}
-
-// handleMsg is invoked whenever an inbound message is received from a remote
-// peer. The remote connection is torn down upon returning any error.
-func (pm *ProtocolManager) handleMsg(p *peer) error {
-	// Read the next message from the remote peer, and ensure it's fully consumed
-	msg, err := p.rw.ReadMsg()
-	if err != nil {
-		return err
-	}
-	if msg.Size > protocolMaxMsgSize {
-		return errResp(ErrMsgTooLarge, "%v > %v", msg.Size, protocolMaxMsgSize)
-	}
-	defer msg.Discard()
-
-	// Handle the message depending on its contents
-	switch {
-	case msg.Code == StatusMsg:
-		// Status messages should never arrive after the handshake
-		return errResp(ErrExtraStatusMsg, "uncontrolled status message")
-
-	// Block header query, collect the requested headers and reply
-	case msg.Code == GetBlockHeadersMsg:
-		// Decode the complex header query
-		var query getBlockHeadersData
-		if err := msg.Decode(&query); err != nil {
-			return errResp(ErrDecode, "%v: %v", msg, err)
-		}
-		hashMode := query.Origin.Hash != (common.Hash{})
-		first := true
-		maxNonCanonical := uint64(100)
-
-		// Gather headers until the fetch or network limits is reached
-		var (
-			bytes   common.StorageSize
-			headers []*types.Header
-			unknown bool
-		)
-		for !unknown && len(headers) < int(query.Amount) && bytes < softResponseLimit && len(headers) < downloader.MaxHeaderFetch {
-			// Retrieve the next header satisfying the query
-			var origin *types.Header
-			if hashMode {
-				if first {
-					first = false
-					origin = pm.blockchain.GetHeaderByHash(query.Origin.Hash)
-					if origin != nil {
-						query.Origin.Number = origin.Number.Uint64()
-					}
-				} else {
-					origin = pm.blockchain.GetHeader(query.Origin.Hash, query.Origin.Number)
-				}
-			} else {
-				origin = pm.blockchain.GetHeaderByNumber(query.Origin.Number)
-			}
-			if origin == nil {
-				break
-			}
-			headers = append(headers, origin)
-			bytes += estHeaderRlpSize
-
-			// Advance to the next header of the query
-			switch {
-			case hashMode && query.Reverse:
-				// Hash based traversal towards the genesis block
-				ancestor := query.Skip + 1
-				if ancestor == 0 {
-					unknown = true
-				} else {
-					query.Origin.Hash, query.Origin.Number = pm.blockchain.GetAncestor(query.Origin.Hash, query.Origin.Number, ancestor, &maxNonCanonical)
-					unknown = (query.Origin.Hash == common.Hash{})
-				}
-			case hashMode && !query.Reverse:
-				// Hash based traversal towards the leaf block
-				var (
-					current = origin.Number.Uint64()
-					next    = current + query.Skip + 1
-				)
-				if next <= current {
-					infos, _ := json.MarshalIndent(p.Peer.Info(), "", "  ")
-					p.Log().Warn("GetBlockHeaders skip overflow attack", "current", current, "skip", query.Skip, "next", next, "attacker", infos)
-					unknown = true
-				} else {
-					if header := pm.blockchain.GetHeaderByNumber(next); header != nil {
-						nextHash := header.Hash()
-						expOldHash, _ := pm.blockchain.GetAncestor(nextHash, next, query.Skip+1, &maxNonCanonical)
-						if expOldHash == query.Origin.Hash {
-							query.Origin.Hash, query.Origin.Number = nextHash, next
-						} else {
-							unknown = true
-						}
-					} else {
-						unknown = true
-					}
-				}
-			case query.Reverse:
-				// Number based traversal towards the genesis block
-				if query.Origin.Number >= query.Skip+1 {
-					query.Origin.Number -= query.Skip + 1
-				} else {
-					unknown = true
-				}
-
-			case !query.Reverse:
-				// Number based traversal towards the leaf block
-				query.Origin.Number += query.Skip + 1
-			}
-		}
-		return p.SendBlockHeaders(headers)
-
-	case msg.Code == BlockHeadersMsg:
-		// A batch of headers arrived to one of our previous requests
-		var headers []*types.Header
-		if err := msg.Decode(&headers); err != nil {
-			return errResp(ErrDecode, "msg %v: %v", msg, err)
-		}
-		// If no headers were received, but we're expencting a checkpoint header, consider it that
-		if len(headers) == 0 && p.syncDrop != nil {
-			// Stop the timer either way, decide later to drop or not
-			p.syncDrop.Stop()
-			p.syncDrop = nil
-
-			// If we're doing a fast sync, we must enforce the checkpoint block to avoid
-			// eclipse attacks. Unsynced nodes are welcome to connect after we're done
-			// joining the network
-			if atomic.LoadUint32(&pm.fastSync) == 1 {
-				p.Log().Warn("Dropping unsynced node during fast sync", "addr", p.RemoteAddr(), "type", p.Name())
-				return errors.New("unsynced node cannot serve fast sync")
-			}
-		}
-		// Filter out any explicitly requested headers, deliver the rest to the downloader
-		filter := len(headers) == 1
-		if filter {
-			// If it's a potential sync progress check, validate the content and advertised chain weight
-			if p.syncDrop != nil && headers[0].Number.Uint64() == pm.checkpointNumber {
-				// Disable the sync drop timer
-				p.syncDrop.Stop()
-				p.syncDrop = nil
-
-				// Validate the header and either drop the peer or continue
-				if headers[0].Hash() != pm.checkpointHash {
-					return errors.New("checkpoint hash mismatch")
-				}
-				return nil
-			}
-			// Otherwise if it's a whitelisted block, validate against the set
-			if want, ok := pm.whitelist[headers[0].Number.Uint64()]; ok {
-				if hash := headers[0].Hash(); want != hash {
-					p.Log().Info("Whitelist mismatch, dropping peer", "number", headers[0].Number.Uint64(), "hash", hash, "want", want)
-					return errors.New("whitelist block mismatch")
-				}
-				p.Log().Debug("Whitelist block verified", "number", headers[0].Number.Uint64(), "hash", want)
-			}
-			// Irrelevant of the fork checks, send the header to the fetcher just in case
-			headers = pm.fetcher.FilterHeaders(p.id, headers, time.Now())
-		}
-		if len(headers) > 0 || !filter {
-			err := pm.downloader.DeliverHeaders(p.id, headers)
-			if err != nil {
-				log.Debug("Failed to deliver headers", "err", err)
-			}
-		}
-
-	case msg.Code == GetBlockBodiesMsg:
-		// Decode the retrieval message
-		msgStream := rlp.NewStream(msg.Payload, uint64(msg.Size))
-		if _, err := msgStream.List(); err != nil {
-			return err
-		}
-		// Gather blocks until the fetch or network limits is reached
-		var (
-			hash   common.Hash
-			bytes  int
-			bodies []rlp.RawValue
-		)
-		for bytes < softResponseLimit && len(bodies) < downloader.MaxBlockFetch {
-			// Retrieve the hash of the next block
-			if err := msgStream.Decode(&hash); err == rlp.EOL {
-				break
-			} else if err != nil {
-				return errResp(ErrDecode, "msg %v: %v", msg, err)
-			}
-			// Retrieve the requested block body, stopping if enough was found
-			if data := pm.blockchain.GetBodyRLP(hash); len(data) != 0 {
-				bodies = append(bodies, data)
-				bytes += len(data)
-			}
-		}
-		return p.SendBlockBodiesRLP(bodies)
-
-	case msg.Code == BlockBodiesMsg:
-		// A batch of block bodies arrived to one of our previous requests
-		var request blockBodiesData
-		if err := msg.Decode(&request); err != nil {
-			return errResp(ErrDecode, "msg %v: %v", msg, err)
-		}
-		// Deliver them all to the downloader for queuing
-		transactions := make([][]*types.Transaction, len(request))
-		uncles := make([][]*types.Header, len(request))
-
-		for i, body := range request {
-			transactions[i] = body.Transactions
-			uncles[i] = body.Uncles
-		}
-		// Filter out any explicitly requested bodies, deliver the rest to the downloader
-		filter := len(transactions) > 0 || len(uncles) > 0
-		if filter {
-			transactions, uncles = pm.fetcher.FilterBodies(p.id, transactions, uncles, time.Now())
-		}
-		if len(transactions) > 0 || len(uncles) > 0 || !filter {
-			err := pm.downloader.DeliverBodies(p.id, transactions, uncles)
-			if err != nil {
-				log.Debug("Failed to deliver bodies", "err", err)
-			}
-		}
-
-	case p.version >= eth63 && msg.Code == GetNodeDataMsg:
-		// Decode the retrieval message
-		msgStream := rlp.NewStream(msg.Payload, uint64(msg.Size))
-		if _, err := msgStream.List(); err != nil {
-			return err
-		}
-		// Gather state data until the fetch or network limits is reached
-		var (
-			hash  common.Hash
-			bytes int
-			data  [][]byte
-		)
-		for bytes < softResponseLimit && len(data) < downloader.MaxStateFetch {
-			// Retrieve the hash of the next state entry
-			if err := msgStream.Decode(&hash); err == rlp.EOL {
-				break
-			} else if err != nil {
-				return errResp(ErrDecode, "msg %v: %v", msg, err)
-			}
-			// Retrieve the requested state entry, stopping if enough was found
-			if entry, err := pm.blockchain.TrieNode(hash); err == nil {
-				data = append(data, entry)
-				bytes += len(entry)
-			}
-		}
-		return p.SendNodeData(data)
-
-	case p.version >= eth63 && msg.Code == NodeDataMsg:
-		// A batch of node state data arrived to one of our previous requests
-		var data [][]byte
-		if err := msg.Decode(&data); err != nil {
-			return errResp(ErrDecode, "msg %v: %v", msg, err)
-		}
-		// Deliver all to the downloader
-		if err := pm.downloader.DeliverNodeData(p.id, data); err != nil {
-			log.Debug("Failed to deliver node state data", "err", err)
-		}
-
-	case p.version >= eth63 && msg.Code == GetReceiptsMsg:
-		// Decode the retrieval message
-		msgStream := rlp.NewStream(msg.Payload, uint64(msg.Size))
-		if _, err := msgStream.List(); err != nil {
-			return err
-		}
-		// Gather state data until the fetch or network limits is reached
-		var (
-			hash     common.Hash
-			bytes    int
-			receipts []rlp.RawValue
-		)
-		for bytes < softResponseLimit && len(receipts) < downloader.MaxReceiptFetch {
-			// Retrieve the hash of the next block
-			if err := msgStream.Decode(&hash); err == rlp.EOL {
-				break
-			} else if err != nil {
-				return errResp(ErrDecode, "msg %v: %v", msg, err)
-			}
-			// Retrieve the requested block's receipts, skipping if unknown to us
-			results := pm.blockchain.GetReceiptsByHash(hash)
-			if results == nil {
-				if header := pm.blockchain.GetHeaderByHash(hash); header == nil || header.ReceiptHash != types.EmptyRootHash {
-					continue
-				}
-			}
-			// If known, encode and queue for response packet
-			if encoded, err := rlp.EncodeToBytes(results); err != nil {
-				log.Error("Failed to encode receipt", "err", err)
-			} else {
-				receipts = append(receipts, encoded)
-				bytes += len(encoded)
-			}
-		}
-		return p.SendReceiptsRLP(receipts)
-
-	case p.version >= eth63 && msg.Code == ReceiptsMsg:
-		// A batch of receipts arrived to one of our previous requests
-		var receipts [][]*types.Receipt
-		if err := msg.Decode(&receipts); err != nil {
-			return errResp(ErrDecode, "msg %v: %v", msg, err)
-		}
-		// Deliver all to the downloader
-		if err := pm.downloader.DeliverReceipts(p.id, receipts); err != nil {
-			log.Debug("Failed to deliver receipts", "err", err)
-		}
-
-	case msg.Code == NewBlockHashesMsg:
-		var announces newBlockHashesData
-		if err := msg.Decode(&announces); err != nil {
-			return errResp(ErrDecode, "%v: %v", msg, err)
-		}
-		// Mark the hashes as present at the remote node
-		for _, block := range announces {
-			p.MarkBlock(block.Hash)
-		}
-		// Schedule all the unknown hashes for retrieval
-		unknown := make(newBlockHashesData, 0, len(announces))
-		for _, block := range announces {
-			if !pm.blockchain.HasBlock(block.Hash, block.Number) {
-				unknown = append(unknown, block)
-			}
-		}
-		for _, block := range unknown {
-			pm.fetcher.Notify(p.id, block.Hash, block.Number, time.Now(), p.RequestOneHeader, p.RequestBodies)
-		}
-
-	case msg.Code == NewBlockMsg:
-		// Retrieve and decode the propagated block
-		var request newBlockData
-		if err := msg.Decode(&request); err != nil {
-			return errResp(ErrDecode, "%v: %v", msg, err)
-		}
-		if err := request.sanityCheck(); err != nil {
-			return err
-		}
-		request.Block.ReceivedAt = msg.ReceivedAt
-		request.Block.ReceivedFrom = p
-
-		// Mark the peer as owning the block and schedule it for import
-		p.MarkBlock(request.Block.Hash())
-		pm.fetcher.Enqueue(p.id, request.Block)
-
-		// Assuming the block is importable by the peer, but possibly not yet done so,
-		// calculate the head hash and TD that the peer truly must have.
-		var (
-			trueHead = request.Block.ParentHash()
-			trueTD   = new(big.Int).Sub(request.TD, request.Block.Difficulty())
-		)
-		// Update the peer's total difficulty if better than the previous
-		if _, td := p.Head(); trueTD.Cmp(td) > 0 {
-			p.SetHead(trueHead, trueTD)
-
-			// Schedule a sync if above ours. Note, this will not fire a sync for a gap of
-			// a single block (as the true TD is below the propagated block), however this
-			// scenario should easily be covered by the fetcher.
-			currentBlock := pm.blockchain.CurrentBlock()
-			if trueTD.Cmp(pm.blockchain.GetTd(currentBlock.Hash(), currentBlock.NumberU64())) > 0 {
-				go pm.synchronise(p)
-			}
-		}
-
-	case msg.Code == TxMsg:
-		// Transactions arrived, make sure we have a valid and fresh chain to handle them
-		if atomic.LoadUint32(&pm.acceptTxs) == 0 {
-			break
-		}
-		// Transactions can be processed, parse all of them and deliver to the pool
-		var txs []*types.Transaction
-		if err := msg.Decode(&txs); err != nil {
-			return errResp(ErrDecode, "msg %v: %v", msg, err)
-		}
-		for i, tx := range txs {
-			// Validate and mark the remote transaction
-			if tx == nil {
-				return errResp(ErrDecode, "transaction %d is nil", i)
-			}
-			p.MarkTransaction(tx.Hash())
-		}
-		pm.txpool.AddRemotes(txs)
-
-	default:
-		return errResp(ErrInvalidMsgCode, "%v", msg.Code)
-	}
-	return nil
-}
-
-// BroadcastBlock will either propagate a block to a subset of it's peers, or
-// will only announce it's availability (depending what's requested).
-func (pm *ProtocolManager) BroadcastBlock(block *types.Block, propagate bool) {
-	hash := block.Hash()
-	peers := pm.peers.PeersWithoutBlock(hash)
-
-	// If propagation is requested, send to a subset of the peer
-	if propagate {
-		// Calculate the TD of the block (it's not imported yet, so block.Td is not valid)
-		var td *big.Int
-		if parent := pm.blockchain.GetBlock(block.ParentHash(), block.NumberU64()-1); parent != nil {
-			td = new(big.Int).Add(block.Difficulty(), pm.blockchain.GetTd(block.ParentHash(), block.NumberU64()-1))
-		} else {
-			log.Error("Propagating dangling block", "number", block.Number(), "hash", hash)
-			return
-		}
-		// Send the block to a subset of our peers
-		transferLen := int(math.Sqrt(float64(len(peers))))
-		if transferLen < minBroadcastPeers {
-			transferLen = minBroadcastPeers
-		}
-		if transferLen > len(peers) {
-			transferLen = len(peers)
-		}
-		transfer := peers[:transferLen]
-		for _, peer := range transfer {
-			peer.AsyncSendNewBlock(block, td)
-		}
-		log.Trace("Propagated block", "hash", hash, "recipients", len(transfer), "duration", common.PrettyDuration(time.Since(block.ReceivedAt)))
-		return
-	}
-	// Otherwise if the block is indeed in out own chain, announce it
-	if pm.blockchain.HasBlock(hash, block.NumberU64()) {
-		for _, peer := range peers {
-			peer.AsyncSendNewBlockHash(block)
-		}
-		log.Trace("Announced block", "hash", hash, "recipients", len(peers), "duration", common.PrettyDuration(time.Since(block.ReceivedAt)))
-	}
-}
-
-// BroadcastTxs will propagate a batch of transactions to all peers which are not known to
-// already have the given transaction.
-func (pm *ProtocolManager) BroadcastTxs(txs types.Transactions) {
-	var txset = make(map[*peer]types.Transactions)
-
-	// Broadcast transactions to a batch of peers not knowing about it
-	for _, tx := range txs {
-		peers := pm.peers.PeersWithoutTx(tx.Hash())
-		for _, peer := range peers {
-			txset[peer] = append(txset[peer], tx)
-		}
-		log.Trace("Broadcast transaction", "hash", tx.Hash(), "recipients", len(peers))
-	}
-	// FIXME include this again: peers = peers[:int(math.Sqrt(float64(len(peers))))]
-	for peer, txs := range txset {
-		peer.AsyncSendTransactions(txs)
-	}
-}
-
-// Mined broadcast loop
-func (pm *ProtocolManager) minedBroadcastLoop() {
-	// automatically stops if unsubscribe
-	for obj := range pm.minedBlockSub.Chan() {
-		if ev, ok := obj.Data.(core.NewMinedBlockEvent); ok {
-			pm.BroadcastBlock(ev.Block, true)  // First propagate block to peers
-			pm.BroadcastBlock(ev.Block, false) // Only then announce to the rest
-		}
-	}
-}
-
-func (pm *ProtocolManager) txBroadcastLoop() {
-	for {
-		select {
-		case event := <-pm.txsCh:
-			pm.BroadcastTxs(event.Txs)
-
-		// Err() channel will be closed when unsubscribing.
-		case <-pm.txsSub.Err():
-			return
-		}
-	}
-}
-
-// NodeInfo represents a short summary of the Ethereum sub-protocol metadata
-// known about the host peer.
-type NodeInfo struct {
-	Network    uint64              `json:"network"`    // Ethereum network ID (1=Frontier, 2=Morden, Ropsten=3, Rinkeby=4)
-	Difficulty *big.Int            `json:"difficulty"` // Total difficulty of the host's blockchain
-	Genesis    common.Hash         `json:"genesis"`    // SHA3 hash of the host's genesis block
-	Config     *params.ChainConfig `json:"config"`     // Chain configuration for the fork rules
-	Head       common.Hash         `json:"head"`       // SHA3 hash of the host's best owned block
-}
-
-// NodeInfo retrieves some protocol metadata about the running host node.
-func (pm *ProtocolManager) NodeInfo() *NodeInfo {
-	currentBlock := pm.blockchain.CurrentBlock()
-	return &NodeInfo{
-		Network:    pm.networkID,
-		Difficulty: pm.blockchain.GetTd(currentBlock.Hash(), currentBlock.NumberU64()),
-		Genesis:    pm.blockchain.Genesis().Hash(),
-		Config:     pm.blockchain.Config(),
-		Head:       currentBlock.Hash(),
-	}
-}
diff --git a/eth/peer.go b/eth/peer.go
deleted file mode 100644
index 9ce569c..0000000
--- a/eth/peer.go
+++ /dev/null
@@ -1,546 +0,0 @@
-// Copyright 2015 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 eth
-
-import (
-	"errors"
-	"fmt"
-	"math/big"
-	"sync"
-	"time"
-
-	mapset "github.com/deckarep/golang-set"
-	"github.com/ava-labs/go-ethereum/common"
-	"github.com/ava-labs/go-ethereum/core/types"
-	"github.com/ava-labs/go-ethereum/p2p"
-	"github.com/ava-labs/go-ethereum/rlp"
-)
-
-var (
-	errClosed            = errors.New("peer set is closed")
-	errAlreadyRegistered = errors.New("peer is already registered")
-	errNotRegistered     = errors.New("peer is not registered")
-)
-
-const (
-	maxKnownTxs    = 32768 // Maximum transactions hashes to keep in the known list (prevent DOS)
-	maxKnownBlocks = 1024  // Maximum block hashes to keep in the known list (prevent DOS)
-
-	// maxQueuedTxs is the maximum number of transaction lists to queue up before
-	// dropping broadcasts. This is a sensitive number as a transaction list might
-	// contain a single transaction, or thousands.
-	maxQueuedTxs = 128
-
-	// maxQueuedProps is the maximum number of block propagations to queue up before
-	// dropping broadcasts. There's not much point in queueing stale blocks, so a few
-	// that might cover uncles should be enough.
-	maxQueuedProps = 4
-
-	// maxQueuedAnns is the maximum number of block announcements to queue up before
-	// dropping broadcasts. Similarly to block propagations, there's no point to queue
-	// above some healthy uncle limit, so use that.
-	maxQueuedAnns = 4
-
-	handshakeTimeout = 5 * time.Second
-)
-
-// PeerInfo represents a short summary of the Ethereum sub-protocol metadata known
-// about a connected peer.
-type PeerInfo struct {
-	Version    int      `json:"version"`    // Ethereum protocol version negotiated
-	Difficulty *big.Int `json:"difficulty"` // Total difficulty of the peer's blockchain
-	Head       string   `json:"head"`       // SHA3 hash of the peer's best owned block
-}
-
-// propEvent is a block propagation, waiting for its turn in the broadcast queue.
-type propEvent struct {
-	block *types.Block
-	td    *big.Int
-}
-
-type peer struct {
-	id string
-
-	*p2p.Peer
-	rw p2p.MsgReadWriter
-
-	version  int         // Protocol version negotiated
-	syncDrop *time.Timer // Timed connection dropper if sync progress isn't validated in time
-
-	head common.Hash
-	td   *big.Int
-	lock sync.RWMutex
-
-	knownTxs    mapset.Set                // Set of transaction hashes known to be known by this peer
-	knownBlocks mapset.Set                // Set of block hashes known to be known by this peer
-	queuedTxs   chan []*types.Transaction // Queue of transactions to broadcast to the peer
-	queuedProps chan *propEvent           // Queue of blocks to broadcast to the peer
-	queuedAnns  chan *types.Block         // Queue of blocks to announce to the peer
-	term        chan struct{}             // Termination channel to stop the broadcaster
-}
-
-func newPeer(version int, p *p2p.Peer, rw p2p.MsgReadWriter) *peer {
-	return &peer{
-		Peer:        p,
-		rw:          rw,
-		version:     version,
-		id:          fmt.Sprintf("%x", p.ID().Bytes()[:8]),
-		knownTxs:    mapset.NewSet(),
-		knownBlocks: mapset.NewSet(),
-		queuedTxs:   make(chan []*types.Transaction, maxQueuedTxs),
-		queuedProps: make(chan *propEvent, maxQueuedProps),
-		queuedAnns:  make(chan *types.Block, maxQueuedAnns),
-		term:        make(chan struct{}),
-	}
-}
-
-// broadcast is a write loop that multiplexes block propagations, announcements
-// and transaction broadcasts into the remote peer. The goal is to have an async
-// writer that does not lock up node internals.
-func (p *peer) broadcast() {
-	for {
-		select {
-		case txs := <-p.queuedTxs:
-			if err := p.SendTransactions(txs); err != nil {
-				return
-			}
-			p.Log().Trace("Broadcast transactions", "count", len(txs))
-
-		case prop := <-p.queuedProps:
-			if err := p.SendNewBlock(prop.block, prop.td); err != nil {
-				return
-			}
-			p.Log().Trace("Propagated block", "number", prop.block.Number(), "hash", prop.block.Hash(), "td", prop.td)
-
-		case block := <-p.queuedAnns:
-			if err := p.SendNewBlockHashes([]common.Hash{block.Hash()}, []uint64{block.NumberU64()}); err != nil {
-				return
-			}
-			p.Log().Trace("Announced block", "number", block.Number(), "hash", block.Hash())
-
-		case <-p.term:
-			return
-		}
-	}
-}
-
-// close signals the broadcast goroutine to terminate.
-func (p *peer) close() {
-	close(p.term)
-}
-
-// Info gathers and returns a collection of metadata known about a peer.
-func (p *peer) Info() *PeerInfo {
-	hash, td := p.Head()
-
-	return &PeerInfo{
-		Version:    p.version,
-		Difficulty: td,
-		Head:       hash.Hex(),
-	}
-}
-
-// Head retrieves a copy of the current head hash and total difficulty of the
-// peer.
-func (p *peer) Head() (hash common.Hash, td *big.Int) {
-	p.lock.RLock()
-	defer p.lock.RUnlock()
-
-	copy(hash[:], p.head[:])
-	return hash, new(big.Int).Set(p.td)
-}
-
-// SetHead updates the head hash and total difficulty of the peer.
-func (p *peer) SetHead(hash common.Hash, td *big.Int) {
-	p.lock.Lock()
-	defer p.lock.Unlock()
-
-	copy(p.head[:], hash[:])
-	p.td.Set(td)
-}
-
-// MarkBlock marks a block as known for the peer, ensuring that the block will
-// never be propagated to this particular peer.
-func (p *peer) MarkBlock(hash common.Hash) {
-	// If we reached the memory allowance, drop a previously known block hash
-	for p.knownBlocks.Cardinality() >= maxKnownBlocks {
-		p.knownBlocks.Pop()
-	}
-	p.knownBlocks.Add(hash)
-}
-
-// MarkTransaction marks a transaction as known for the peer, ensuring that it
-// will never be propagated to this particular peer.
-func (p *peer) MarkTransaction(hash common.Hash) {
-	// If we reached the memory allowance, drop a previously known transaction hash
-	for p.knownTxs.Cardinality() >= maxKnownTxs {
-		p.knownTxs.Pop()
-	}
-	p.knownTxs.Add(hash)
-}
-
-// SendTransactions sends transactions to the peer and includes the hashes
-// in its transaction hash set for future reference.
-func (p *peer) SendTransactions(txs types.Transactions) error {
-	// Mark all the transactions as known, but ensure we don't overflow our limits
-	for _, tx := range txs {
-		p.knownTxs.Add(tx.Hash())
-	}
-	for p.knownTxs.Cardinality() >= maxKnownTxs {
-		p.knownTxs.Pop()
-	}
-	return p2p.Send(p.rw, TxMsg, txs)
-}
-
-// AsyncSendTransactions queues list of transactions propagation to a remote
-// peer. If the peer's broadcast queue is full, the event is silently dropped.
-func (p *peer) AsyncSendTransactions(txs []*types.Transaction) {
-	select {
-	case p.queuedTxs <- txs:
-		// Mark all the transactions as known, but ensure we don't overflow our limits
-		for _, tx := range txs {
-			p.knownTxs.Add(tx.Hash())
-		}
-		for p.knownTxs.Cardinality() >= maxKnownTxs {
-			p.knownTxs.Pop()
-		}
-	default:
-		p.Log().Debug("Dropping transaction propagation", "count", len(txs))
-	}
-}
-
-// SendNewBlockHashes announces the availability of a number of blocks through
-// a hash notification.
-func (p *peer) SendNewBlockHashes(hashes []common.Hash, numbers []uint64) error {
-	// Mark all the block hashes as known, but ensure we don't overflow our limits
-	for _, hash := range hashes {
-		p.knownBlocks.Add(hash)
-	}
-	for p.knownBlocks.Cardinality() >= maxKnownBlocks {
-		p.knownBlocks.Pop()
-	}
-	request := make(newBlockHashesData, len(hashes))
-	for i := 0; i < len(hashes); i++ {
-		request[i].Hash = hashes[i]
-		request[i].Number = numbers[i]
-	}
-	return p2p.Send(p.rw, NewBlockHashesMsg, request)
-}
-
-// AsyncSendNewBlockHash queues the availability of a block for propagation to a
-// remote peer. If the peer's broadcast queue is full, the event is silently
-// dropped.
-func (p *peer) AsyncSendNewBlockHash(block *types.Block) {
-	select {
-	case p.queuedAnns <- block:
-		// Mark all the block hash as known, but ensure we don't overflow our limits
-		p.knownBlocks.Add(block.Hash())
-		for p.knownBlocks.Cardinality() >= maxKnownBlocks {
-			p.knownBlocks.Pop()
-		}
-	default:
-		p.Log().Debug("Dropping block announcement", "number", block.NumberU64(), "hash", block.Hash())
-	}
-}
-
-// SendNewBlock propagates an entire block to a remote peer.
-func (p *peer) SendNewBlock(block *types.Block, td *big.Int) error {
-	// Mark all the block hash as known, but ensure we don't overflow our limits
-	p.knownBlocks.Add(block.Hash())
-	for p.knownBlocks.Cardinality() >= maxKnownBlocks {
-		p.knownBlocks.Pop()
-	}
-	return p2p.Send(p.rw, NewBlockMsg, []interface{}{block, td})
-}
-
-// AsyncSendNewBlock queues an entire block for propagation to a remote peer. If
-// the peer's broadcast queue is full, the event is silently dropped.
-func (p *peer) AsyncSendNewBlock(block *types.Block, td *big.Int) {
-	select {
-	case p.queuedProps <- &propEvent{block: block, td: td}:
-		// Mark all the block hash as known, but ensure we don't overflow our limits
-		p.knownBlocks.Add(block.Hash())
-		for p.knownBlocks.Cardinality() >= maxKnownBlocks {
-			p.knownBlocks.Pop()
-		}
-	default:
-		p.Log().Debug("Dropping block propagation", "number", block.NumberU64(), "hash", block.Hash())
-	}
-}
-
-// SendBlockHeaders sends a batch of block headers to the remote peer.
-func (p *peer) SendBlockHeaders(headers []*types.Header) error {
-	return p2p.Send(p.rw, BlockHeadersMsg, headers)
-}
-
-// SendBlockBodies sends a batch of block contents to the remote peer.
-func (p *peer) SendBlockBodies(bodies []*blockBody) error {
-	return p2p.Send(p.rw, BlockBodiesMsg, blockBodiesData(bodies))
-}
-
-// SendBlockBodiesRLP sends a batch of block contents to the remote peer from
-// an already RLP encoded format.
-func (p *peer) SendBlockBodiesRLP(bodies []rlp.RawValue) error {
-	return p2p.Send(p.rw, BlockBodiesMsg, bodies)
-}
-
-// SendNodeDataRLP sends a batch of arbitrary internal data, corresponding to the
-// hashes requested.
-func (p *peer) SendNodeData(data [][]byte) error {
-	return p2p.Send(p.rw, NodeDataMsg, data)
-}
-
-// SendReceiptsRLP sends a batch of transaction receipts, corresponding to the
-// ones requested from an already RLP encoded format.
-func (p *peer) SendReceiptsRLP(receipts []rlp.RawValue) error {
-	return p2p.Send(p.rw, ReceiptsMsg, receipts)
-}
-
-// RequestOneHeader is a wrapper around the header query functions to fetch a
-// single header. It is used solely by the fetcher.
-func (p *peer) RequestOneHeader(hash common.Hash) error {
-	p.Log().Debug("Fetching single header", "hash", hash)
-	return p2p.Send(p.rw, GetBlockHeadersMsg, &getBlockHeadersData{Origin: hashOrNumber{Hash: hash}, Amount: uint64(1), Skip: uint64(0), Reverse: false})
-}
-
-// RequestHeadersByHash fetches a batch of blocks' headers corresponding to the
-// specified header query, based on the hash of an origin block.
-func (p *peer) RequestHeadersByHash(origin common.Hash, amount int, skip int, reverse bool) error {
-	p.Log().Debug("Fetching batch of headers", "count", amount, "fromhash", origin, "skip", skip, "reverse", reverse)
-	return p2p.Send(p.rw, GetBlockHeadersMsg, &getBlockHeadersData{Origin: hashOrNumber{Hash: origin}, Amount: uint64(amount), Skip: uint64(skip), Reverse: reverse})
-}
-
-// RequestHeadersByNumber fetches a batch of blocks' headers corresponding to the
-// specified header query, based on the number of an origin block.
-func (p *peer) RequestHeadersByNumber(origin uint64, amount int, skip int, reverse bool) error {
-	p.Log().Debug("Fetching batch of headers", "count", amount, "fromnum", origin, "skip", skip, "reverse", reverse)
-	return p2p.Send(p.rw, GetBlockHeadersMsg, &getBlockHeadersData{Origin: hashOrNumber{Number: origin}, Amount: uint64(amount), Skip: uint64(skip), Reverse: reverse})
-}
-
-// RequestBodies fetches a batch of blocks' bodies corresponding to the hashes
-// specified.
-func (p *peer) RequestBodies(hashes []common.Hash) error {
-	p.Log().Debug("Fetching batch of block bodies", "count", len(hashes))
-	return p2p.Send(p.rw, GetBlockBodiesMsg, hashes)
-}
-
-// RequestNodeData fetches a batch of arbitrary data from a node's known state
-// data, corresponding to the specified hashes.
-func (p *peer) RequestNodeData(hashes []common.Hash) error {
-	p.Log().Debug("Fetching batch of state data", "count", len(hashes))
-	return p2p.Send(p.rw, GetNodeDataMsg, hashes)
-}
-
-// RequestReceipts fetches a batch of transaction receipts from a remote node.
-func (p *peer) RequestReceipts(hashes []common.Hash) error {
-	p.Log().Debug("Fetching batch of receipts", "count", len(hashes))
-	return p2p.Send(p.rw, GetReceiptsMsg, hashes)
-}
-
-// Handshake executes the eth protocol handshake, negotiating version number,
-// network IDs, difficulties, head and genesis blocks.
-func (p *peer) Handshake(network uint64, td *big.Int, head common.Hash, genesis common.Hash) error {
-	// Send out own handshake in a new thread
-	errc := make(chan error, 2)
-	var status statusData // safe to read after two values have been received from errc
-
-	go func() {
-		errc <- p2p.Send(p.rw, StatusMsg, &statusData{
-			ProtocolVersion: uint32(p.version),
-			NetworkId:       network,
-			TD:              td,
-			CurrentBlock:    head,
-			GenesisBlock:    genesis,
-		})
-	}()
-	go func() {
-		errc <- p.readStatus(network, &status, genesis)
-	}()
-	timeout := time.NewTimer(handshakeTimeout)
-	defer timeout.Stop()
-	for i := 0; i < 2; i++ {
-		select {
-		case err := <-errc:
-			if err != nil {
-				return err
-			}
-		case <-timeout.C:
-			return p2p.DiscReadTimeout
-		}
-	}
-	p.td, p.head = status.TD, status.CurrentBlock
-	return nil
-}
-
-func (p *peer) readStatus(network uint64, status *statusData, genesis common.Hash) (err error) {
-	msg, err := p.rw.ReadMsg()
-	if err != nil {
-		return err
-	}
-	if msg.Code != StatusMsg {
-		return errResp(ErrNoStatusMsg, "first msg has code %x (!= %x)", msg.Code, StatusMsg)
-	}
-	if msg.Size > protocolMaxMsgSize {
-		return errResp(ErrMsgTooLarge, "%v > %v", msg.Size, protocolMaxMsgSize)
-	}
-	// Decode the handshake and make sure everything matches
-	if err := msg.Decode(&status); err != nil {
-		return errResp(ErrDecode, "msg %v: %v", msg, err)
-	}
-	if status.GenesisBlock != genesis {
-		return errResp(ErrGenesisBlockMismatch, "%x (!= %x)", status.GenesisBlock[:8], genesis[:8])
-	}
-	if status.NetworkId != network {
-		return errResp(ErrNetworkIdMismatch, "%d (!= %d)", status.NetworkId, network)
-	}
-	if int(status.ProtocolVersion) != p.version {
-		return errResp(ErrProtocolVersionMismatch, "%d (!= %d)", status.ProtocolVersion, p.version)
-	}
-	return nil
-}
-
-// String implements fmt.Stringer.
-func (p *peer) String() string {
-	return fmt.Sprintf("Peer %s [%s]", p.id,
-		fmt.Sprintf("eth/%2d", p.version),
-	)
-}
-
-// peerSet represents the collection of active peers currently participating in
-// the Ethereum sub-protocol.
-type peerSet struct {
-	peers  map[string]*peer
-	lock   sync.RWMutex
-	closed bool
-}
-
-// newPeerSet creates a new peer set to track the active participants.
-func newPeerSet() *peerSet {
-	return &peerSet{
-		peers: make(map[string]*peer),
-	}
-}
-
-// Register injects a new peer into the working set, or returns an error if the
-// peer is already known. If a new peer it registered, its broadcast loop is also
-// started.
-func (ps *peerSet) Register(p *peer) error {
-	ps.lock.Lock()
-	defer ps.lock.Unlock()
-
-	if ps.closed {
-		return errClosed
-	}
-	if _, ok := ps.peers[p.id]; ok {
-		return errAlreadyRegistered
-	}
-	ps.peers[p.id] = p
-	go p.broadcast()
-
-	return nil
-}
-
-// Unregister removes a remote peer from the active set, disabling any further
-// actions to/from that particular entity.
-func (ps *peerSet) Unregister(id string) error {
-	ps.lock.Lock()
-	defer ps.lock.Unlock()
-
-	p, ok := ps.peers[id]
-	if !ok {
-		return errNotRegistered
-	}
-	delete(ps.peers, id)
-	p.close()
-
-	return nil
-}
-
-// Peer retrieves the registered peer with the given id.
-func (ps *peerSet) Peer(id string) *peer {
-	ps.lock.RLock()
-	defer ps.lock.RUnlock()
-
-	return ps.peers[id]
-}
-
-// Len returns if the current number of peers in the set.
-func (ps *peerSet) Len() int {
-	ps.lock.RLock()
-	defer ps.lock.RUnlock()
-
-	return len(ps.peers)
-}
-
-// PeersWithoutBlock retrieves a list of peers that do not have a given block in
-// their set of known hashes.
-func (ps *peerSet) PeersWithoutBlock(hash common.Hash) []*peer {
-	ps.lock.RLock()
-	defer ps.lock.RUnlock()
-
-	list := make([]*peer, 0, len(ps.peers))
-	for _, p := range ps.peers {
-		if !p.knownBlocks.Contains(hash) {
-			list = append(list, p)
-		}
-	}
-	return list
-}
-
-// PeersWithoutTx retrieves a list of peers that do not have a given transaction
-// in their set of known hashes.
-func (ps *peerSet) PeersWithoutTx(hash common.Hash) []*peer {
-	ps.lock.RLock()
-	defer ps.lock.RUnlock()
-
-	list := make([]*peer, 0, len(ps.peers))
-	for _, p := range ps.peers {
-		if !p.knownTxs.Contains(hash) {
-			list = append(list, p)
-		}
-	}
-	return list
-}
-
-// BestPeer retrieves the known peer with the currently highest total difficulty.
-func (ps *peerSet) BestPeer() *peer {
-	ps.lock.RLock()
-	defer ps.lock.RUnlock()
-
-	var (
-		bestPeer *peer
-		bestTd   *big.Int
-	)
-	for _, p := range ps.peers {
-		if _, td := p.Head(); bestPeer == nil || td.Cmp(bestTd) > 0 {
-			bestPeer, bestTd = p, td
-		}
-	}
-	return bestPeer
-}
-
-// Close disconnects all peers.
-// No new peers can be registered after Close has returned.
-func (ps *peerSet) Close() {
-	ps.lock.Lock()
-	defer ps.lock.Unlock()
-
-	for _, p := range ps.peers {
-		p.Disconnect(p2p.DiscQuitting)
-	}
-	ps.closed = true
-}
diff --git a/eth/protocol.go b/eth/protocol.go
index 07d2def..e205aad 100644
--- a/eth/protocol.go
+++ b/eth/protocol.go
@@ -22,8 +22,8 @@ import (
 	"math/big"
 
 	"github.com/ava-labs/coreth/core"
+	"github.com/ava-labs/coreth/core/types"
 	"github.com/ava-labs/go-ethereum/common"
-	"github.com/ava-labs/go-ethereum/core/types"
 	"github.com/ava-labs/go-ethereum/event"
 	"github.com/ava-labs/go-ethereum/rlp"
 )
diff --git a/eth/sync.go b/eth/sync.go
deleted file mode 100644
index 6f067a3..0000000
--- a/eth/sync.go
+++ /dev/null
@@ -1,216 +0,0 @@
-// Copyright 2015 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 eth
-
-import (
-	"math/rand"
-	"sync/atomic"
-	"time"
-
-	"github.com/ava-labs/go-ethereum/common"
-	"github.com/ava-labs/go-ethereum/core/types"
-	"github.com/ava-labs/go-ethereum/eth/downloader"
-	"github.com/ava-labs/go-ethereum/log"
-	"github.com/ava-labs/go-ethereum/p2p/enode"
-)
-
-const (
-	forceSyncCycle      = 10 * time.Second // Time interval to force syncs, even if few peers are available
-	minDesiredPeerCount = 5                // Amount of peers desired to start syncing
-
-	// This is the target size for the packs of transactions sent by txsyncLoop.
-	// A pack can get larger than this if a single transactions exceeds this size.
-	txsyncPackSize = 100 * 1024
-)
-
-type txsync struct {
-	p   *peer
-	txs []*types.Transaction
-}
-
-// syncTransactions starts sending all currently pending transactions to the given peer.
-func (pm *ProtocolManager) syncTransactions(p *peer) {
-	var txs types.Transactions
-	pending, _ := pm.txpool.Pending()
-	for _, batch := range pending {
-		txs = append(txs, batch...)
-	}
-	if len(txs) == 0 {
-		return
-	}
-	select {
-	case pm.txsyncCh <- &txsync{p, txs}:
-	case <-pm.quitSync:
-	}
-}
-
-// txsyncLoop takes care of the initial transaction sync for each new
-// connection. When a new peer appears, we relay all currently pending
-// transactions. In order to minimise egress bandwidth usage, we send
-// the transactions in small packs to one peer at a time.
-func (pm *ProtocolManager) txsyncLoop() {
-	var (
-		pending = make(map[enode.ID]*txsync)
-		sending = false               // whether a send is active
-		pack    = new(txsync)         // the pack that is being sent
-		done    = make(chan error, 1) // result of the send
-	)
-
-	// send starts a sending a pack of transactions from the sync.
-	send := func(s *txsync) {
-		// Fill pack with transactions up to the target size.
-		size := common.StorageSize(0)
-		pack.p = s.p
-		pack.txs = pack.txs[:0]
-		for i := 0; i < len(s.txs) && size < txsyncPackSize; i++ {
-			pack.txs = append(pack.txs, s.txs[i])
-			size += s.txs[i].Size()
-		}
-		// Remove the transactions that will be sent.
-		s.txs = s.txs[:copy(s.txs, s.txs[len(pack.txs):])]
-		if len(s.txs) == 0 {
-			delete(pending, s.p.ID())
-		}
-		// Send the pack in the background.
-		s.p.Log().Trace("Sending batch of transactions", "count", len(pack.txs), "bytes", size)
-		sending = true
-		go func() { done <- pack.p.SendTransactions(pack.txs) }()
-	}
-
-	// pick chooses the next pending sync.
-	pick := func() *txsync {
-		if len(pending) == 0 {
-			return nil
-		}
-		n := rand.Intn(len(pending)) + 1
-		for _, s := range pending {
-			if n--; n == 0 {
-				return s
-			}
-		}
-		return nil
-	}
-
-	for {
-		select {
-		case s := <-pm.txsyncCh:
-			pending[s.p.ID()] = s
-			if !sending {
-				send(s)
-			}
-		case err := <-done:
-			sending = false
-			// Stop tracking peers that cause send failures.
-			if err != nil {
-				pack.p.Log().Debug("Transaction send failed", "err", err)
-				delete(pending, pack.p.ID())
-			}
-			// Schedule the next send.
-			if s := pick(); s != nil {
-				send(s)
-			}
-		case <-pm.quitSync:
-			return
-		}
-	}
-}
-
-// syncer is responsible for periodically synchronising with the network, both
-// downloading hashes and blocks as well as handling the announcement handler.
-func (pm *ProtocolManager) syncer() {
-	// Start and ensure cleanup of sync mechanisms
-	pm.fetcher.Start()
-	defer pm.fetcher.Stop()
-	defer pm.downloader.Terminate()
-
-	// Wait for different events to fire synchronisation operations
-	forceSync := time.NewTicker(forceSyncCycle)
-	defer forceSync.Stop()
-
-	for {
-		select {
-		case <-pm.newPeerCh:
-			// Make sure we have peers to select from, then sync
-			if pm.peers.Len() < minDesiredPeerCount {
-				break
-			}
-			go pm.synchronise(pm.peers.BestPeer())
-
-		case <-forceSync.C:
-			// Force a sync even if not enough peers are present
-			go pm.synchronise(pm.peers.BestPeer())
-
-		case <-pm.noMorePeers:
-			return
-		}
-	}
-}
-
-// synchronise tries to sync up our local block chain with a remote peer.
-func (pm *ProtocolManager) synchronise(peer *peer) {
-	// Short circuit if no peers are available
-	if peer == nil {
-		return
-	}
-	// Make sure the peer's TD is higher than our own
-	currentBlock := pm.blockchain.CurrentBlock()
-	td := pm.blockchain.GetTd(currentBlock.Hash(), currentBlock.NumberU64())
-
-	pHead, pTd := peer.Head()
-	if pTd.Cmp(td) <= 0 {
-		return
-	}
-	// Otherwise try to sync with the downloader
-	mode := downloader.FullSync
-	if atomic.LoadUint32(&pm.fastSync) == 1 {
-		// Fast sync was explicitly requested, and explicitly granted
-		mode = downloader.FastSync
-	}
-	if mode == downloader.FastSync {
-		// Make sure the peer's total difficulty we are synchronizing is higher.
-		if pm.blockchain.GetTdByHash(pm.blockchain.CurrentFastBlock().Hash()).Cmp(pTd) >= 0 {
-			return
-		}
-	}
-	// Run the sync cycle, and disable fast sync if we've went past the pivot block
-	if err := pm.downloader.Synchronise(peer.id, pHead, pTd, mode); err != nil {
-		return
-	}
-	if atomic.LoadUint32(&pm.fastSync) == 1 {
-		log.Info("Fast sync complete, auto disabling")
-		atomic.StoreUint32(&pm.fastSync, 0)
-	}
-	// If we've successfully finished a sync cycle and passed any required checkpoint,
-	// enable accepting transactions from the network.
-	head := pm.blockchain.CurrentBlock()
-	if head.NumberU64() >= pm.checkpointNumber {
-		// Checkpoint passed, sanity check the timestamp to have a fallback mechanism
-		// for non-checkpointed (number = 0) private networks.
-		if head.Time() >= uint64(time.Now().AddDate(0, -1, 0).Unix()) {
-			atomic.StoreUint32(&pm.acceptTxs, 1)
-		}
-	}
-	if head.NumberU64() > 0 {
-		// We've completed a sync cycle, notify all peers of new state. This path is
-		// essential in star-topology networks where a gateway node needs to notify
-		// all its out-of-date peers of the availability of a new block. This failure
-		// scenario will most often crop up in private and hackathon networks with
-		// degenerate connectivity, but it should be healthy for the mainnet too to
-		// more reliably update peers or the local TD state.
-		go pm.BroadcastBlock(head, false)
-	}
-}
diff --git a/eth/tracers/internal/tracers/4byte_tracer.js b/eth/tracers/internal/tracers/4byte_tracer.js
new file mode 100644
index 0000000..462b4ad
--- /dev/null
+++ b/eth/tracers/internal/tracers/4byte_tracer.js
@@ -0,0 +1,86 @@
+// Copyright 2017 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/>.
+
+// 4byteTracer searches for 4byte-identifiers, and collects them for post-processing.
+// It collects the methods identifiers along with the size of the supplied data, so
+// a reversed signature can be matched against the size of the data.
+//
+// Example:
+//   > debug.traceTransaction( "0x214e597e35da083692f5386141e69f47e973b2c56e7a8073b1ea08fd7571e9de", {tracer: "4byteTracer"})
+//   {
+//     0x27dc297e-128: 1,
+//     0x38cc4831-0: 2,
+//     0x524f3889-96: 1,
+//     0xadf59f99-288: 1,
+//     0xc281d19e-0: 1
+//   }
+{
+	// ids aggregates the 4byte ids found.
+	ids : {},
+
+	// callType returns 'false' for non-calls, or the peek-index for the first param
+	// after 'value', i.e. meminstart.
+	callType: function(opstr){
+		switch(opstr){
+		case "CALL": case "CALLCODE":
+			// gas, addr, val, memin, meminsz, memout, memoutsz
+			return 3; // stack ptr to memin
+
+		case "DELEGATECALL": case "STATICCALL":
+			// gas, addr, memin, meminsz, memout, memoutsz
+			return 2; // stack ptr to memin
+		}
+		return false;
+	},
+
+	// store save the given indentifier and datasize.
+	store: function(id, size){
+		var key = "" + toHex(id) + "-" + size;
+		this.ids[key] = this.ids[key] + 1 || 1;
+	},
+
+	// step is invoked for every opcode that the VM executes.
+	step: function(log, db) {
+		// Skip any opcodes that are not internal calls
+		var ct = this.callType(log.op.toString());
+		if (!ct) {
+			return;
+		}
+		// Skip any pre-compile invocations, those are just fancy opcodes
+		if (isPrecompiled(toAddress(log.stack.peek(1).toString(16)))) {
+			return;
+		}
+		// Gather internal call details
+		var inSz = log.stack.peek(ct + 1).valueOf();
+		if (inSz >= 4) {
+			var inOff = log.stack.peek(ct).valueOf();
+			this.store(log.memory.slice(inOff, inOff + 4), inSz-4);
+		}
+	},
+
+	// fault is invoked when the actual execution of an opcode fails.
+	fault: function(log, db) { },
+
+	// result is invoked when all the opcodes have been iterated over and returns
+	// the final result of the tracing.
+	result: function(ctx) {
+		// Save the outer calldata also
+		if (ctx.input.length >= 4) {
+			this.store(slice(ctx.input, 0, 4), ctx.input.length-4)
+		}
+		return this.ids;
+	},
+}
diff --git a/eth/tracers/internal/tracers/assets.go b/eth/tracers/internal/tracers/assets.go
new file mode 100644
index 0000000..d0a0bf7
--- /dev/null
+++ b/eth/tracers/internal/tracers/assets.go
@@ -0,0 +1,463 @@
+// Code generated by go-bindata. DO NOT EDIT.
+// sources:
+// 4byte_tracer.js (2.933kB)
+// bigram_tracer.js (1.712kB)
+// call_tracer.js (8.643kB)
+// evmdis_tracer.js (4.194kB)
+// noop_tracer.js (1.271kB)
+// opcount_tracer.js (1.372kB)
+// prestate_tracer.js (4.234kB)
+// trigram_tracer.js (1.788kB)
+// unigram_tracer.js (1.51kB)
+
+package tracers
+
+import (
+	"bytes"
+	"compress/gzip"
+	"crypto/sha256"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strings"
+	"time"
+)
+
+func bindataRead(data []byte, name string) ([]byte, error) {
+	gz, err := gzip.NewReader(bytes.NewBuffer(data))
+	if err != nil {
+		return nil, fmt.Errorf("read %q: %v", name, err)
+	}
+
+	var buf bytes.Buffer
+	_, err = io.Copy(&buf, gz)
+	clErr := gz.Close()
+
+	if err != nil {
+		return nil, fmt.Errorf("read %q: %v", name, err)
+	}
+	if clErr != nil {
+		return nil, err
+	}
+
+	return buf.Bytes(), nil
+}
+
+type asset struct {
+	bytes  []byte
+	info   os.FileInfo
+	digest [sha256.Size]byte
+}
+
+type bindataFileInfo struct {
+	name    string
+	size    int64
+	mode    os.FileMode
+	modTime time.Time
+}
+
+func (fi bindataFileInfo) Name() string {
+	return fi.name
+}
+func (fi bindataFileInfo) Size() int64 {
+	return fi.size
+}
+func (fi bindataFileInfo) Mode() os.FileMode {
+	return fi.mode
+}
+func (fi bindataFileInfo) ModTime() time.Time {
+	return fi.modTime
+}
+func (fi bindataFileInfo) IsDir() bool {
+	return false
+}
+func (fi bindataFileInfo) Sys() interface{} {
+	return nil
+}
+
+var __4byte_tracerJs = 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+
+func _4byte_tracerJsBytes() ([]byte, error) {
+	return bindataRead(
+		__4byte_tracerJs,
+		"4byte_tracer.js",
+	)
+}
+
+func _4byte_tracerJs() (*asset, error) {
+	bytes, err := _4byte_tracerJsBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "4byte_tracer.js", size: 0, mode: os.FileMode(0), modTime: time.Unix(0, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0xb4, 0xc5, 0x48, 0x2d, 0xd9, 0x43, 0x95, 0x93, 0x3b, 0x93, 0x2c, 0x47, 0x8c, 0x84, 0x32, 0x3c, 0x8b, 0x2e, 0xf3, 0x72, 0xc4, 0x57, 0xe6, 0x3a, 0xb3, 0xdf, 0x1d, 0xbf, 0x45, 0x3, 0xfc, 0xa}}
+	return a, nil
+}
+
+var _bigram_tracerJs = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x8c\x54\x5b\x6f\xdb\x36\x14\x7e\xf7\xaf\xf8\xde\x92\x20\xae\xd4\x6e\x2f\x83\x33\x0f\xd0\xb2\xa4\x35\x90\xda\x81\xad\xac\x30\x86\x3d\x50\xd2\x91\x44\x84\x26\x05\xf2\xd0\xae\x50\xe4\xbf\x17\x94\x2c\x5f\x8a\x14\x8d\x9e\x64\xf3\xbb\x9d\x0b\x15\xc7\xb8\x35\x4d\x6b\x65\x55\x33\x7e\x7b\xff\xe1\x0f\xa4\x35\xa1\x32\xef\x88\x6b\xb2\xe4\x37\x48\x3c\xd7\xc6\xba\x51\x1c\x23\xad\xa5\x43\x29\x15\x41\x3a\x34\xc2\x32\x4c\x09\xfe\x01\xaf\x64\x66\x85\x6d\xa3\x51\x1c\xf7\x9c\x57\x8f\x83\x42\x69\x89\xe0\x4c\xc9\x3b\x61\x69\x82\xd6\x78\xe4\x42\xc3\x52\x21\x1d\x5b\x99\x79\x26\x48\x86\xd0\x45\x6c\x2c\x36\xa6\x90\x65\x1b\x24\x25\xc3\xeb\x82\x6c\x67\xcd\x64\x37\x6e\xc8\xf1\x71\xfe\x84\x07\x72\x8e\x2c\x3e\x92\x26\x2b\x14\x1e\x7d\xa6\x64\x8e\x07\x99\x93\x76\x04\xe1\xd0\x84\x7f\x5c\x4d\x05\xb2\x4e\x2e\x10\xef\x43\x94\xd5\x3e\x0a\xee\x8d\xd7\x85\x60\x69\xf4\x18\x24\x43\x72\x6c\xc9\x3a\x69\x34\x7e\x1f\xac\xf6\x82\x63\x18\x1b\x44\x2e\x05\x87\x02\x2c\x4c\x13\x78\x57\x10\xba\x85\x12\x7c\xa4\xbe\xa1\x21\xc7\xba\x0b\x48\xdd\xd9\xd4\xa6\x21\x70\x2d\x38\x54\xbd\x93\x4a\x21\x23\x78\x47\xa5\x57\xe3\xa0\x96\x79\xc6\x97\x59\xfa\x69\xf1\x94\x22\x99\xaf\xf1\x25\x59\x2e\x93\x79\xba\xbe\xc1\x4e\x72\x6d\x3c\x83\xb6\xd4\x4b\xc9\x4d\xa3\x24\x15\xd8\x09\x6b\x85\xe6\x16\xa6\x0c\x0a\x9f\xef\x96\xb7\x9f\x92\x79\x9a\xfc\x3d\x7b\x98\xa5\x6b\x18\x8b\xfb\x59\x3a\xbf\x5b\xad\x70\xbf\x58\x22\xc1\x63\xb2\x4c\x67\xb7\x4f\x0f\xc9\x12\x8f\x4f\xcb\xc7\xc5\xea\x2e\xc2\x8a\x42\x2a\x0a\xfc\x5f\xf7\xbc\xec\xa6\x67\x09\x05\xb1\x90\xca\x0d\x9d\x58\x1b\x0f\x57\x1b\xaf\x0a\xd4\x62\x4b\xb0\x94\x93\xdc\x52\x01\x81\xdc\x34\xed\x9b\x87\x1a\xb4\x84\x32\xba\xea\x6a\xfe\xe9\x42\x62\x56\x42\x1b\x1e\xc3\x11\xe1\xcf\x9a\xb9\x99\xc4\xf1\x6e\xb7\x8b\x2a\xed\x23\x63\xab\x58\xf5\x72\x2e\xfe\x2b\x1a\x8d\xbe\x8d\x00\x20\x8e\x51\x4b\xc7\x61\x38\x41\x36\x37\x5e\x33\xd9\x6e\xdf\x4c\x93\x9b\x82\x90\xc9\xca\x8a\x8d\xeb\xd0\x01\x3a\xc1\xb7\x97\xf1\xc0\x55\xc2\xf1\xa2\x09\xec\xf0\x06\xd3\x90\xed\xd6\xaa\x3b\xef\x0f\x27\xb8\xb8\x38\xe0\xe9\x2b\xe5\x3e\x00\x50\x50\xc3\x75\xb0\xd9\x13\x0f\x8c\x7f\xc2\xc1\x04\xef\x0f\x1c\xc7\xd4\x39\x48\xbd\x35\xcf\x54\x74\xdd\xa6\x2d\xd9\x76\x48\xd8\x6d\x4f\x48\xff\xef\xe7\xbd\x01\xb9\xa8\x63\x07\xea\x04\xa5\xd7\x79\xf0\xbc\x54\xa6\x1a\xa3\xc8\xae\xd0\xd7\x1e\x9e\xad\x08\x1b\x8d\x29\x94\xa9\x22\xd3\x44\x6c\x56\x6c\xa5\xae\x2e\xaf\x6e\xce\x30\x7d\xdc\x1e\x56\x51\x1f\xf2\x14\x23\x4b\x5c\xee\x31\x53\x70\x2d\x5d\x74\xa8\xe5\xea\xe8\x36\xa8\x3d\x53\x8b\x13\xd8\xa2\xb9\xbe\x78\x77\x71\x6d\x9a\x9b\x33\x64\xd0\xec\x30\xa1\xed\xff\x3d\x53\xfb\xff\x0f\x52\xe1\x39\x07\x5c\x5f\x9f\x4b\xbc\x9c\xfd\x22\xe5\x08\xbf\x92\xc0\x14\x1f\x7e\x26\x72\x7c\x3b\xc9\x8e\x29\x4e\x93\x9f\x17\x8f\x69\xdf\xba\xfe\xfc\xb8\x38\xa5\xf0\x8a\x4f\xa7\xba\xab\xf7\xb7\x58\xe4\xec\x85\x3a\xd9\x14\x53\x42\xe8\x61\xd6\x65\x7f\xbf\x82\x4a\x27\xf1\xea\x74\x8f\x36\x96\xdc\x6b\x3e\x42\xa9\xce\xab\x17\x75\xfd\xed\xcc\x88\x34\x24\x87\x0d\xa6\x02\x66\x4b\x36\x7c\x99\x61\x89\xbd\xd5\x6e\x50\x0c\xb4\x52\x6a\xa1\x06\xed\xfd\x25\x66\x2b\x72\xa9\xab\x3e\x5a\x7f\x74\x92\x2d\xe7\xaf\xa7\x5b\xd7\x6b\x1e\x1b\x7f\xe8\xce\xcb\xe8\x7b\x00\x00\x00\xff\xff\x83\xb5\xcb\x27\xb0\x06\x00\x00")
+
+func bigram_tracerJsBytes() ([]byte, error) {
+	return bindataRead(
+		_bigram_tracerJs,
+		"bigram_tracer.js",
+	)
+}
+
+func bigram_tracerJs() (*asset, error) {
+	bytes, err := bigram_tracerJsBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "bigram_tracer.js", size: 0, mode: os.FileMode(0), modTime: time.Unix(0, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0x77, 0x6c, 0xd, 0x24, 0xf2, 0x49, 0xbd, 0x58, 0x8b, 0xb5, 0xd1, 0xc9, 0xcd, 0xcf, 0x5b, 0x3e, 0x5c, 0xfb, 0x14, 0x50, 0xe7, 0xe3, 0xb9, 0xd1, 0x54, 0x69, 0xe6, 0x5e, 0x45, 0xa6, 0x2c, 0x6c}}
+	return a, nil
+}
+
+var _call_tracerJs = 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+
+func call_tracerJsBytes() ([]byte, error) {
+	return bindataRead(
+		_call_tracerJs,
+		"call_tracer.js",
+	)
+}
+
+func call_tracerJs() (*asset, error) {
+	bytes, err := call_tracerJsBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "call_tracer.js", size: 0, mode: os.FileMode(0), modTime: time.Unix(0, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0xe9, 0xef, 0x68, 0xda, 0xd8, 0x9, 0xf5, 0xd5, 0x71, 0xa8, 0x8a, 0xfb, 0x30, 0xe8, 0xf0, 0x72, 0x14, 0x36, 0x6b, 0x62, 0x5a, 0x4e, 0xff, 0x16, 0xdc, 0xd3, 0x2c, 0x68, 0x7b, 0x79, 0x9f, 0xd3}}
+	return a, nil
+}
+
+var _evmdis_tracerJs = 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+
+func evmdis_tracerJsBytes() ([]byte, error) {
+	return bindataRead(
+		_evmdis_tracerJs,
+		"evmdis_tracer.js",
+	)
+}
+
+func evmdis_tracerJs() (*asset, error) {
+	bytes, err := evmdis_tracerJsBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "evmdis_tracer.js", size: 0, mode: os.FileMode(0), modTime: time.Unix(0, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0xd5, 0xe8, 0x96, 0xa1, 0x8b, 0xc, 0x68, 0x3c, 0xe8, 0x5d, 0x7e, 0xf0, 0xab, 0xfe, 0xec, 0xd1, 0xb, 0x3d, 0xfc, 0xc7, 0xac, 0xb5, 0xa, 0x41, 0x55, 0x0, 0x3a, 0x60, 0xa7, 0x8e, 0x46, 0x93}}
+	return a, nil
+}
+
+var _noop_tracerJs = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x8c\x93\x4f\x6f\xdb\x46\x10\xc5\xcf\xe6\xa7\x78\xc7\x04\x50\xc5\xfe\x39\x14\x70\x8a\x02\xac\x61\x27\x2a\x1c\xdb\x90\xe8\x06\x3e\x0e\xc9\xa1\xb8\xe9\x6a\x87\x9d\x9d\x95\x22\x18\xfe\xee\xc5\x92\x12\x12\x14\x69\x9b\x9b\xb0\xd2\xfb\xbd\x37\xf3\x46\x65\x89\x2b\x19\x8f\xea\xb6\x83\xe1\xc7\xef\x7f\xf8\x19\xf5\xc0\xd8\xca\x77\x6c\x03\x2b\xa7\x1d\xaa\x64\x83\x68\x2c\xca\x12\xf5\xe0\x22\x7a\xe7\x19\x2e\x62\x24\x35\x48\x0f\xfb\xc7\xef\xbd\x6b\x94\xf4\xb8\x2c\xca\x72\xd6\x7c\xf5\xeb\x4c\xe8\x95\x19\x51\x7a\x3b\x90\xf2\x25\x8e\x92\xd0\x52\x80\x72\xe7\xa2\xa9\x6b\x92\x31\x9c\x81\x42\x57\x8a\x62\x27\x9d\xeb\x8f\x19\xe9\x0c\x29\x74\xac\x93\xb5\xb1\xee\xe2\x39\xc7\xdb\xbb\x47\xdc\x72\x8c\xac\x78\xcb\x81\x95\x3c\x1e\x52\xe3\x5d\x8b\x5b\xd7\x72\x88\x0c\x8a\x18\xf3\x4b\x1c\xb8\x43\x33\xe1\xb2\xf0\x26\x47\xd9\x9c\xa2\xe0\x46\x52\xe8\xc8\x9c\x84\x05\xd8\xe5\xe4\xd8\xb3\x46\x27\x01\x3f\x9d\xad\x4e\xc0\x05\x44\x33\xe4\x15\x59\x1e\x40\x21\x63\xd6\xbd\x06\x85\x23\x3c\xd9\x67\xe9\x37\x2c\xe4\xf3\xdc\x1d\x5c\x98\x6c\x06\x19\x19\x36\x90\xe5\xa9\x0f\xce\x7b\x34\x8c\x14\xb9\x4f\x7e\x91\x69\x4d\x32\x7c\x58\xd5\xef\xee\x1f\x6b\x54\x77\x4f\xf8\x50\xad\xd7\xd5\x5d\xfd\xf4\x06\x07\x67\x83\x24\x03\xef\x79\x46\xb9\xdd\xe8\x1d\x77\x38\x90\x2a\x05\x3b\x42\xfa\x4c\x78\x7f\xbd\xbe\x7a\x57\xdd\xd5\xd5\x6f\xab\xdb\x55\xfd\x04\x51\xdc\xac\xea\xbb\xeb\xcd\x06\x37\xf7\x6b\x54\x78\xa8\xd6\xf5\xea\xea\xf1\xb6\x5a\xe3\xe1\x71\xfd\x70\xbf\xb9\x5e\x62\xc3\x39\x15\x67\xfd\xff\xef\xbc\x9f\xda\x53\x46\xc7\x46\xce\xc7\xf3\x26\x9e\x24\x21\x0e\x92\x7c\x87\x81\xf6\x0c\xe5\x96\xdd\x9e\x3b\x10\x5a\x19\x8f\xdf\x5c\x6a\x66\x91\x97\xb0\x9d\x66\xfe\xd7\x83\xc4\xaa\x47\x10\x5b\x20\x32\xe3\x97\xc1\x6c\xbc\x2c\xcb\xc3\xe1\xb0\xdc\x86\xb4\x14\xdd\x96\x7e\xc6\xc5\xf2\xd7\x65\x91\x99\x41\x64\xac\x95\x5a\xd6\x5c\xce\xc7\x14\x6d\x62\x37\xa4\xdc\x48\x60\x34\xe2\x3c\xeb\x98\x5b\x46\x2b\x5d\x1e\xe0\xaf\xe4\x94\x3b\xf4\x2a\x3b\x10\x7e\xa7\x3d\x6d\x5a\x75\xa3\x65\x9c\x34\x1f\xb9\x35\x98\xcc\x15\x52\xe3\xa7\x73\x24\x98\x52\x88\xd4\xe6\xbb\xc9\x9f\x5b\xd6\x65\xf1\x5c\x5c\x94\x25\xa2\xf1\x98\xbd\x5d\xd8\xcb\x9f\x99\x2b\x9a\xfb\xd4\x23\x64\x9c\x1c\xa7\xcb\xc8\xa1\xfe\x78\x0f\xfe\xc4\x6d\x32\x8e\xcb\xe2\x22\xeb\x2e\xd1\xa7\x30\x41\x5f\x79\xd9\x2e\xd0\x35\xaf\xf1\x8c\x97\x45\x31\x91\x7b\x4a\xde\xbe\x44\x1f\x86\xd3\x99\x50\x6b\x89\xfc\x89\x96\x23\x49\x0f\x0a\x67\xc3\x7e\x2e\xf0\x62\xd2\xff\xb7\x85\x72\xfc\x9a\x07\x79\x3f\xf9\xcc\xc0\x38\x57\xdf\x30\x07\x38\x63\xa5\x7c\xfb\xb2\x67\xcd\x7f\x7b\x28\x5b\xd2\x10\x27\x5c\xd6\xf4\x2e\x90\x3f\x83\x4f\xe7\x91\x37\xe6\xc2\x76\x59\x5c\xcc\xef\x5f\x84\x6a\xed\xd3\x39\xd4\x4c\xc2\xf3\xcb\x1b\xbc\x14\x2f\xc5\xdf\x01\x00\x00\xff\xff\x77\x56\xe7\x1a\xf7\x04\x00\x00")
+
+func noop_tracerJsBytes() ([]byte, error) {
+	return bindataRead(
+		_noop_tracerJs,
+		"noop_tracer.js",
+	)
+}
+
+func noop_tracerJs() (*asset, error) {
+	bytes, err := noop_tracerJsBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "noop_tracer.js", size: 0, mode: os.FileMode(0), modTime: time.Unix(0, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0xe3, 0xf, 0x1c, 0x6f, 0x65, 0xaf, 0x90, 0x31, 0xab, 0xf, 0xe0, 0xca, 0x54, 0x7, 0xfd, 0xd3, 0xa1, 0x4a, 0x14, 0x1, 0x2a, 0x9d, 0xdc, 0xb9, 0x64, 0x69, 0x83, 0x30, 0xb1, 0x2a, 0xbd, 0xfb}}
+	return a, nil
+}
+
+var _opcount_tracerJs = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x8c\x94\xcf\x6e\xdb\x46\x10\x87\xcf\xe2\x53\xfc\x8e\x09\xa2\x92\x69\x7b\x28\xe0\x16\x05\x58\xc3\x4e\x04\xd8\xb2\x21\xd1\x09\x7c\x5c\x92\x43\x71\x9b\xd5\x2e\x31\x3b\x2b\x86\x08\xfc\xee\xc5\x2e\xc5\xc6\x08\x5c\xd4\xd7\xd5\xcc\xf7\xcd\x3f\xb1\x28\x70\xe9\x86\x89\xf5\xa1\x17\xfc\xf2\xfe\xe7\xdf\x50\xf5\x84\x83\xfb\x89\xa4\x27\xa6\x70\x44\x19\xa4\x77\xec\xb3\xa2\x40\xd5\x6b\x8f\x4e\x1b\x82\xf6\x18\x14\x0b\x5c\x07\xf9\x21\xde\xe8\x9a\x15\x4f\x79\x56\x14\x73\xce\x8b\x3f\x47\x42\xc7\x44\xf0\xae\x93\x51\x31\x5d\x60\x72\x01\x8d\xb2\x60\x6a\xb5\x17\xd6\x75\x10\x82\x16\x28\xdb\x16\x8e\x71\x74\xad\xee\xa6\x88\xd4\x82\x60\x5b\xe2\xa4\x16\xe2\xa3\x5f\xea\xf8\xb0\x7d\xc0\x0d\x79\x4f\x8c\x0f\x64\x89\x95\xc1\x7d\xa8\x8d\x6e\x70\xa3\x1b\xb2\x9e\xa0\x3c\x86\xf8\xe2\x7b\x6a\x51\x27\x5c\x4c\xbc\x8e\xa5\xec\xcf\xa5\xe0\xda\x05\xdb\x2a\xd1\xce\xae\x41\x3a\x56\x8e\x13\xb1\xd7\xce\xe2\xd7\x45\x75\x06\xae\xe1\x38\x42\xde\x28\x89\x0d\x30\xdc\x10\xf3\xde\x42\xd9\x09\x46\xc9\xf7\xd4\x57\x0c\xe4\x7b\xdf\x2d\xb4\x4d\x9a\xde\x0d\x04\xe9\x95\xc4\xae\x47\x6d\x0c\x6a\x42\xf0\xd4\x05\xb3\x8e\xb4\x3a\x08\x3e\x6f\xaa\x8f\x77\x0f\x15\xca\xed\x23\x3e\x97\xbb\x5d\xb9\xad\x1e\x7f\xc7\xa8\xa5\x77\x41\x40\x27\x9a\x51\xfa\x38\x18\x4d\x2d\x46\xc5\xac\xac\x4c\x70\x5d\x24\xdc\x5e\xed\x2e\x3f\x96\xdb\xaa\xfc\x6b\x73\xb3\xa9\x1e\xe1\x18\xd7\x9b\x6a\x7b\xb5\xdf\xe3\xfa\x6e\x87\x12\xf7\xe5\xae\xda\x5c\x3e\xdc\x94\x3b\xdc\x3f\xec\xee\xef\xf6\x57\x39\xf6\x14\xab\xa2\x98\xff\xff\x33\xef\xd2\xf6\x98\xd0\x92\x28\x6d\xfc\x32\x89\x47\x17\xe0\x7b\x17\x4c\x8b\x5e\x9d\x08\x4c\x0d\xe9\x13\xb5\x50\x68\xdc\x30\xbd\x7a\xa9\x91\xa5\x8c\xb3\x87\xd4\xf3\x7f\x1e\x24\x36\x1d\xac\x93\x35\x3c\x11\xfe\xe8\x45\x86\x8b\xa2\x18\xc7\x31\x3f\xd8\x90\x3b\x3e\x14\x66\xc6\xf9\xe2\xcf\x3c\x8b\x4c\x37\x34\x2e\x58\xa9\x58\x35\xc4\x71\x3f\x0a\x5e\x1d\x07\x43\x90\xf9\x29\xed\xe5\xef\xe0\x05\x29\xd0\x27\xb5\x0d\xc7\x9a\x38\x16\xaf\xad\x17\x0e\x4d\xbc\x87\xf4\xf7\xa1\xaf\xd4\xa4\xdd\xd6\x53\x8a\xbc\xfa\x74\x8b\x9a\xba\x38\x99\x74\xc9\xac\xac\x57\x29\x3c\x5d\xb5\xb6\x4a\xa8\xcd\xb3\x6f\xd9\xaa\x28\x66\x43\x12\x7f\xf9\xd1\x13\x39\xcf\x5d\xff\x8a\xf2\x6c\x95\xd2\x2e\xf0\x7e\x9d\x25\x8a\x17\x1a\x62\x27\xda\x9e\xdc\x17\x6a\xd3\x6a\xe8\x44\x3c\xa5\x66\xdb\xf3\xa9\x45\xfc\xa7\xdb\x05\xe3\xf3\x6c\x15\xf3\x2e\xd0\x05\x9b\x0c\x6f\x8c\x3b\xac\xd1\xd6\x6f\xf1\x0d\xd2\x6b\x9f\x27\xcb\xbb\x77\x78\x3a\x6b\x3a\x15\x8c\x3c\xf7\x8c\xfd\xf9\x08\x55\x23\x41\x99\x33\x3a\x76\xea\x3a\x28\xbb\xd8\xbb\xf9\x3c\x56\x29\xff\x65\xdf\xa2\x60\xf2\x2f\x39\x94\x31\xc9\x33\x03\xfd\x7c\x58\x35\x91\x85\x16\xe2\x38\x50\xb8\x13\x71\xfc\xa8\x80\x49\x02\x5b\x9f\x70\x31\xa7\xd3\x56\x99\x05\x7c\x3e\xbe\x38\x70\x6d\x0f\x79\xb6\x9a\xdf\x9f\x15\xd5\xc8\xd7\xa5\xa8\x99\xf4\x6c\x16\x78\xca\x9e\xb2\x7f\x02\x00\x00\xff\xff\xdd\xd8\xa1\x0a\x5c\x05\x00\x00")
+
+func opcount_tracerJsBytes() ([]byte, error) {
+	return bindataRead(
+		_opcount_tracerJs,
+		"opcount_tracer.js",
+	)
+}
+
+func opcount_tracerJs() (*asset, error) {
+	bytes, err := opcount_tracerJsBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "opcount_tracer.js", size: 0, mode: os.FileMode(0), modTime: time.Unix(0, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0x27, 0xe, 0x97, 0x88, 0x9b, 0x53, 0xbb, 0x20, 0x44, 0xd8, 0xf5, 0xeb, 0x41, 0xd2, 0x7e, 0xd6, 0xda, 0x6b, 0xf5, 0xaf, 0x0, 0x75, 0x9f, 0xd9, 0x22, 0xc, 0x6e, 0x74, 0xac, 0x2a, 0xa9, 0xa7}}
+	return a, nil
+}
+
+var _prestate_tracerJs = 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+
+func prestate_tracerJsBytes() ([]byte, error) {
+	return bindataRead(
+		_prestate_tracerJs,
+		"prestate_tracer.js",
+	)
+}
+
+func prestate_tracerJs() (*asset, error) {
+	bytes, err := prestate_tracerJsBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "prestate_tracer.js", size: 0, mode: os.FileMode(0), modTime: time.Unix(0, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0xe9, 0x79, 0x70, 0x4f, 0xc5, 0x78, 0x57, 0x63, 0x6f, 0x5, 0x31, 0xce, 0x3e, 0x5d, 0xbd, 0x71, 0x4, 0x46, 0x78, 0xcd, 0x1d, 0xcd, 0xb9, 0xd8, 0x10, 0xff, 0xe6, 0xc5, 0x59, 0xb9, 0x25, 0x6e}}
+	return a, nil
+}
+
+var _trigram_tracerJs = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x8c\x94\x4f\x6f\xe3\x36\x10\xc5\xef\xfe\x14\xaf\x27\x27\x88\xd7\x4a\xda\x4b\xe1\xd4\x05\xdc\x6c\xb2\x6b\x20\x6b\x07\xb6\xd2\x45\x10\xe4\x40\x4b\x23\x89\x08\x4d\x0a\xe4\xd0\x5e\x21\xc8\x77\x2f\xa8\x3f\xfe\x13\xb8\xed\xfa\x64\x70\xe6\xfd\xe6\xcd\x70\xc4\x28\xc2\x8d\x29\x2b\x2b\xf3\x82\xf1\xeb\xe5\xd5\xef\x88\x0b\x42\x6e\x3e\x11\x17\x64\xc9\xaf\x31\xf1\x5c\x18\xeb\x7a\x51\x84\xb8\x90\x0e\x99\x54\x04\xe9\x50\x0a\xcb\x30\x19\xf8\x43\xbe\x92\x2b\x2b\x6c\x35\xec\x45\x51\xa3\x39\x19\x0e\x84\xcc\x12\xc1\x99\x8c\xb7\xc2\xd2\x08\x95\xf1\x48\x84\x86\xa5\x54\x3a\xb6\x72\xe5\x99\x20\x19\x42\xa7\x91\xb1\x58\x9b\x54\x66\x55\x40\x4a\x86\xd7\x29\xd9\xba\x34\x93\x5d\xbb\xce\xc7\x97\xd9\x23\xee\xc9\x39\xb2\xf8\x42\x9a\xac\x50\x78\xf0\x2b\x25\x13\xdc\xcb\x84\xb4\x23\x08\x87\x32\x9c\xb8\x82\x52\xac\x6a\x5c\x10\xde\x05\x2b\xcb\xd6\x0a\xee\x8c\xd7\xa9\x60\x69\xf4\x00\x24\x83\x73\x6c\xc8\x3a\x69\x34\x7e\xeb\x4a\xb5\xc0\x01\x8c\x0d\x90\x33\xc1\xa1\x01\x0b\x53\x06\xdd\x39\x84\xae\xa0\x04\xef\xa5\x3f\x31\x90\x7d\xdf\x29\xa4\xae\xcb\x14\xa6\x24\x70\x21\x38\x74\xbd\x95\x4a\x61\x45\xf0\x8e\x32\xaf\x06\x81\xb6\xf2\x8c\xef\xd3\xf8\xeb\xfc\x31\xc6\x64\xf6\x84\xef\x93\xc5\x62\x32\x8b\x9f\xae\xb1\x95\x5c\x18\xcf\xa0\x0d\x35\x28\xb9\x2e\x95\xa4\x14\x5b\x61\xad\xd0\x5c\xc1\x64\x81\xf0\xed\x76\x71\xf3\x75\x32\x8b\x27\x7f\x4d\xef\xa7\xf1\x13\x8c\xc5\xdd\x34\x9e\xdd\x2e\x97\xb8\x9b\x2f\x30\xc1\xc3\x64\x11\x4f\x6f\x1e\xef\x27\x0b\x3c\x3c\x2e\x1e\xe6\xcb\xdb\x21\x96\x14\x5c\x51\xd0\xff\xff\xcc\xb3\xfa\xf6\x2c\x21\x25\x16\x52\xb9\x6e\x12\x4f\xc6\xc3\x15\xc6\xab\x14\x85\xd8\x10\x2c\x25\x24\x37\x94\x42\x20\x31\x65\xf5\xd3\x97\x1a\x58\x42\x19\x9d\xd7\x3d\xff\xeb\x42\x62\x9a\x41\x1b\x1e\xc0\x11\xe1\x8f\x82\xb9\x1c\x45\xd1\x76\xbb\x1d\xe6\xda\x0f\x8d\xcd\x23\xd5\xe0\x5c\xf4\xe7\xb0\xd7\x7b\xeb\x01\x40\x14\xa1\x90\x8e\xc3\xe5\x04\xec\x5a\x94\xb5\x2b\x2b\x73\x2b\xd6\x48\x8c\xd7\x4c\xd6\xd5\xa9\x21\x6f\x84\xb7\xf7\x41\x27\x54\xc2\xf1\xbc\x0c\xd2\xf0\x0f\xa6\x24\x5b\xef\x54\x1d\x6f\x82\x6e\x84\xe7\x7e\x7f\xd0\xef\xbf\x0c\x76\xa7\x9f\xa9\xe4\x62\x84\xcb\xe6\xa4\x65\x39\xa6\x9a\x24\xf5\xc6\xbc\x52\x5a\x8f\x94\x36\x64\x2b\x98\x32\x31\x69\xbb\x22\xc1\xe2\xdf\xdf\x40\x3f\x28\xf1\x4c\x6e\x58\x13\x82\x74\x84\xcc\xeb\x24\x14\x3f\x53\x26\x1f\x20\x5d\x9d\xe3\x6d\xc7\xdf\x08\x8b\x34\x54\xc5\x18\xca\xe4\xc3\x9c\x1a\x13\x67\xe7\xd7\xbb\x1c\x99\xe1\xac\xc9\xf9\x65\x0c\x2e\xa4\x1b\xee\xbc\x9e\xef\x49\xe1\xb7\x0b\xce\x4b\x87\x71\xd7\xdf\xf5\xe9\x9c\xcf\x6d\xd9\x1a\x7d\x9c\x63\x89\xbd\xd5\xfb\xb3\xf7\x23\xbf\xa6\x6c\xcd\x9a\x72\xc8\x66\xc9\x56\xea\xfc\xd0\x6f\xc8\x79\xa5\x0a\xe3\x23\x3f\xcf\x97\x2f\x17\xfd\x4f\xfd\x8b\xa3\xb3\xab\xe6\xcc\x94\xc7\xdd\xd6\x39\xe1\x52\x9f\x5f\xa9\x7a\x39\xd5\xe4\x2e\x78\x71\x71\xca\x26\x29\x47\xf8\x2f\x19\xc6\xb8\x3a\x25\xfc\xe0\xf8\x63\x0f\x57\x07\xc3\xfc\x10\xc0\x18\x5d\x1b\xfb\x3d\xcc\x84\x57\x7c\xb8\x3c\xdb\xa2\x7d\x11\x44\xc2\x5e\xa8\x76\x5f\xc2\xeb\x66\x32\x08\xdd\xad\x54\xd6\x7c\xab\x81\x52\x23\x4e\x2e\xd1\xbe\x8c\x25\x77\xaa\x8e\x50\xaa\xae\xd5\x40\x5d\xf3\xa5\xaf\x88\x34\x24\x87\x0f\x82\x52\x98\x0d\xd9\xf0\xca\xb7\x57\xee\x3a\x62\x90\x65\x52\x0b\xd5\xb1\xdb\x07\x81\xad\x48\xa4\xce\x1b\x6b\x4d\xe8\xc0\x5b\xc2\x3f\x0e\x97\xbb\x61\xee\x27\xbf\x9b\xce\x7b\xef\x9f\x00\x00\x00\xff\xff\xb3\x93\x16\xd5\xfc\x06\x00\x00")
+
+func trigram_tracerJsBytes() ([]byte, error) {
+	return bindataRead(
+		_trigram_tracerJs,
+		"trigram_tracer.js",
+	)
+}
+
+func trigram_tracerJs() (*asset, error) {
+	bytes, err := trigram_tracerJsBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "trigram_tracer.js", size: 0, mode: os.FileMode(0), modTime: time.Unix(0, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0x40, 0x63, 0xe1, 0x42, 0x60, 0x7, 0x1b, 0x79, 0x47, 0x1, 0xa1, 0xbf, 0xc4, 0x66, 0x19, 0x9b, 0x2b, 0x5a, 0x1f, 0x82, 0x3d, 0xcf, 0xee, 0xe7, 0x60, 0x25, 0x2c, 0x4f, 0x13, 0x97, 0xc7, 0x18}}
+	return a, nil
+}
+
+var _unigram_tracerJs = []byte("\x1f\x8b\x08\x00\x00\x00\x00\x00\x00\xff\x8c\x54\x4d\x6f\xdb\x46\x10\xbd\xeb\x57\xbc\xa3\x8c\xa8\xa4\xd3\x5e\x0a\xa5\x09\xc0\x1a\x76\x22\xc0\x91\x0d\x89\x6e\x60\x14\x3d\x2c\xc9\x21\xb9\xe8\x6a\x87\xd8\x9d\x95\x42\x04\xfa\xef\xc5\x92\xa2\xe5\x1a\x6e\x13\x9e\x04\xcd\xbc\x8f\x79\x33\x64\x9a\xe2\x8a\xbb\xde\xe9\xa6\x15\xfc\x7c\xf9\xf6\x57\xe4\x2d\xa1\xe1\x9f\x48\x5a\x72\x14\x76\xc8\x82\xb4\xec\xfc\x2c\x4d\x91\xb7\xda\xa3\xd6\x86\xa0\x3d\x3a\xe5\x04\x5c\x43\x5e\xf4\x1b\x5d\x38\xe5\xfa\x64\x96\xa6\x23\xe6\xd5\x72\x64\xa8\x1d\x11\x3c\xd7\x72\x50\x8e\x96\xe8\x39\xa0\x54\x16\x8e\x2a\xed\xc5\xe9\x22\x08\x41\x0b\x94\xad\x52\x76\xd8\x71\xa5\xeb\x3e\x52\x6a\x41\xb0\x15\xb9\x41\x5a\xc8\xed\xfc\xe4\xe3\xe3\xfa\x01\xb7\xe4\x3d\x39\x7c\x24\x4b\x4e\x19\xdc\x87\xc2\xe8\x12\xb7\xba\x24\xeb\x09\xca\xa3\x8b\xff\xf8\x96\x2a\x14\x03\x5d\x04\xde\x44\x2b\xdb\x93\x15\xdc\x70\xb0\x95\x12\xcd\x76\x01\xd2\xd1\x39\xf6\xe4\xbc\x66\x8b\x5f\x26\xa9\x13\xe1\x02\xec\x22\xc9\x5c\x49\x1c\xc0\x81\xbb\x88\xbb\x80\xb2\x3d\x8c\x92\x33\xf4\x07\x02\x39\xcf\x5d\x41\xdb\x41\xa6\xe5\x8e\x20\xad\x92\x38\xf5\x41\x1b\x83\x82\x10\x3c\xd5\xc1\x2c\x22\x5b\x11\x04\x5f\x56\xf9\xa7\xbb\x87\x1c\xd9\xfa\x11\x5f\xb2\xcd\x26\x5b\xe7\x8f\xef\x70\xd0\xd2\x72\x10\xd0\x9e\x46\x2a\xbd\xeb\x8c\xa6\x0a\x07\xe5\x9c\xb2\xd2\x83\xeb\xc8\xf0\xf9\x7a\x73\xf5\x29\x5b\xe7\xd9\xef\xab\xdb\x55\xfe\x08\x76\xb8\x59\xe5\xeb\xeb\xed\x16\x37\x77\x1b\x64\xb8\xcf\x36\xf9\xea\xea\xe1\x36\xdb\xe0\xfe\x61\x73\x7f\xb7\xbd\x4e\xb0\xa5\xe8\x8a\x22\xfe\xfb\x99\xd7\xc3\xf6\x1c\xa1\x22\x51\xda\xf8\x29\x89\x47\x0e\xf0\x2d\x07\x53\xa1\x55\x7b\x82\xa3\x92\xf4\x9e\x2a\x28\x94\xdc\xf5\x3f\xbc\xd4\xc8\xa5\x0c\xdb\x66\x98\xf9\x3f\x0f\x12\xab\x1a\x96\x65\x01\x4f\x84\xdf\x5a\x91\x6e\x99\xa6\x87\xc3\x21\x69\x6c\x48\xd8\x35\xa9\x19\xe9\x7c\xfa\x21\x99\xcd\xbe\xcd\x00\x20\x4d\xd1\x6a\x2f\x71\x39\x91\x76\xa7\xba\xe8\x8a\xbb\x92\x2b\xf2\x10\x46\xc9\xc1\x0a\x39\x3f\x74\xc7\xd6\x25\xbe\x1d\x17\x13\xd6\x72\xe7\xc7\x16\x0f\x1b\x76\x05\xb9\x11\x3e\xb6\xc7\xea\x12\x97\x4f\xdd\x5e\xa8\x8b\x4a\xda\xee\xf9\x6f\xaa\x86\xdc\x68\x4f\xae\x3f\x09\x8e\x77\x10\x7d\xfc\xf1\x19\xf4\x95\xca\x20\xe4\x93\x01\x1d\xa1\x4b\xd4\xc1\x96\xf1\xfa\xe6\x86\x9b\x05\xaa\xe2\x02\xe3\x14\xf1\xd9\xab\x78\x9b\x78\x0f\xc3\x4d\xc2\x5d\x22\xbc\x15\xa7\x6d\x33\xbf\x78\xf7\xd4\xa3\x6b\xcc\xa5\xd5\x3e\x89\x83\xfc\xc9\xdd\x5f\x17\x67\x7c\x7c\xfe\x55\x7b\xf3\xe6\x0c\x3c\x3e\xfd\x22\xe3\x09\xff\x83\xc2\x7b\xbc\x7d\x0d\x37\x34\xc5\x40\x26\xda\x73\x88\xb5\x0a\x46\x9e\xe7\x72\x68\x4f\x17\xad\x4a\x09\xca\x9c\xa2\x88\x6f\x27\xd7\x50\x76\x4a\xab\x1e\x6f\x2d\xb2\x0c\x14\xaf\xe6\x73\x5c\xcc\x26\x1d\x47\xfe\x35\x21\x65\xcc\x20\x36\x2d\x7d\x38\xd5\x82\xc8\x42\x0b\x39\x15\xdf\x55\xde\x93\x8b\x9f\x29\x38\x92\xe0\xac\x9f\x18\x23\xac\xd6\x56\x99\x89\xfb\x74\xd1\xe2\x54\xa9\x6d\x33\x7a\x1b\x4b\xcf\xcc\x95\xf2\xf5\xf9\xe2\x74\x3d\x7f\x0a\x07\x1f\x70\xf9\x62\x27\xa3\xe4\x39\xe4\x97\xe1\x1e\x17\xb3\xe3\xec\x9f\x00\x00\x00\xff\xff\x8d\xba\x8d\xa8\xe6\x05\x00\x00")
+
+func unigram_tracerJsBytes() ([]byte, error) {
+	return bindataRead(
+		_unigram_tracerJs,
+		"unigram_tracer.js",
+	)
+}
+
+func unigram_tracerJs() (*asset, error) {
+	bytes, err := unigram_tracerJsBytes()
+	if err != nil {
+		return nil, err
+	}
+
+	info := bindataFileInfo{name: "unigram_tracer.js", size: 0, mode: os.FileMode(0), modTime: time.Unix(0, 0)}
+	a := &asset{bytes: bytes, info: info, digest: [32]uint8{0x2f, 0x36, 0x14, 0xc2, 0xf6, 0xc3, 0x80, 0x2b, 0x4a, 0x11, 0x7d, 0xd5, 0x3e, 0xef, 0x23, 0xb5, 0xd6, 0xe6, 0xe6, 0x5, 0x41, 0xf6, 0x14, 0x7a, 0x39, 0xf7, 0xf8, 0xac, 0x89, 0x8e, 0x43, 0xe6}}
+	return a, nil
+}
+
+// Asset loads and returns the asset for the given name.
+// It returns an error if the asset could not be found or
+// could not be loaded.
+func Asset(name string) ([]byte, error) {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	if f, ok := _bindata[canonicalName]; ok {
+		a, err := f()
+		if err != nil {
+			return nil, fmt.Errorf("Asset %s can't read by error: %v", name, err)
+		}
+		return a.bytes, nil
+	}
+	return nil, fmt.Errorf("Asset %s not found", name)
+}
+
+// AssetString returns the asset contents as a string (instead of a []byte).
+func AssetString(name string) (string, error) {
+	data, err := Asset(name)
+	return string(data), err
+}
+
+// MustAsset is like Asset but panics when Asset would return an error.
+// It simplifies safe initialization of global variables.
+func MustAsset(name string) []byte {
+	a, err := Asset(name)
+	if err != nil {
+		panic("asset: Asset(" + name + "): " + err.Error())
+	}
+
+	return a
+}
+
+// MustAssetString is like AssetString but panics when Asset would return an
+// error. It simplifies safe initialization of global variables.
+func MustAssetString(name string) string {
+	return string(MustAsset(name))
+}
+
+// AssetInfo loads and returns the asset info for the given name.
+// It returns an error if the asset could not be found or
+// could not be loaded.
+func AssetInfo(name string) (os.FileInfo, error) {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	if f, ok := _bindata[canonicalName]; ok {
+		a, err := f()
+		if err != nil {
+			return nil, fmt.Errorf("AssetInfo %s can't read by error: %v", name, err)
+		}
+		return a.info, nil
+	}
+	return nil, fmt.Errorf("AssetInfo %s not found", name)
+}
+
+// AssetDigest returns the digest of the file with the given name. It returns an
+// error if the asset could not be found or the digest could not be loaded.
+func AssetDigest(name string) ([sha256.Size]byte, error) {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	if f, ok := _bindata[canonicalName]; ok {
+		a, err := f()
+		if err != nil {
+			return [sha256.Size]byte{}, fmt.Errorf("AssetDigest %s can't read by error: %v", name, err)
+		}
+		return a.digest, nil
+	}
+	return [sha256.Size]byte{}, fmt.Errorf("AssetDigest %s not found", name)
+}
+
+// Digests returns a map of all known files and their checksums.
+func Digests() (map[string][sha256.Size]byte, error) {
+	mp := make(map[string][sha256.Size]byte, len(_bindata))
+	for name := range _bindata {
+		a, err := _bindata[name]()
+		if err != nil {
+			return nil, err
+		}
+		mp[name] = a.digest
+	}
+	return mp, nil
+}
+
+// AssetNames returns the names of the assets.
+func AssetNames() []string {
+	names := make([]string, 0, len(_bindata))
+	for name := range _bindata {
+		names = append(names, name)
+	}
+	return names
+}
+
+// _bindata is a table, holding each asset generator, mapped to its name.
+var _bindata = map[string]func() (*asset, error){
+	"4byte_tracer.js": _4byte_tracerJs,
+
+	"bigram_tracer.js": bigram_tracerJs,
+
+	"call_tracer.js": call_tracerJs,
+
+	"evmdis_tracer.js": evmdis_tracerJs,
+
+	"noop_tracer.js": noop_tracerJs,
+
+	"opcount_tracer.js": opcount_tracerJs,
+
+	"prestate_tracer.js": prestate_tracerJs,
+
+	"trigram_tracer.js": trigram_tracerJs,
+
+	"unigram_tracer.js": unigram_tracerJs,
+}
+
+// AssetDir returns the file names below a certain
+// directory embedded in the file by go-bindata.
+// For example if you run go-bindata on data/... and data contains the
+// following hierarchy:
+//     data/
+//       foo.txt
+//       img/
+//         a.png
+//         b.png
+// then AssetDir("data") would return []string{"foo.txt", "img"},
+// AssetDir("data/img") would return []string{"a.png", "b.png"},
+// AssetDir("foo.txt") and AssetDir("notexist") would return an error, and
+// AssetDir("") will return []string{"data"}.
+func AssetDir(name string) ([]string, error) {
+	node := _bintree
+	if len(name) != 0 {
+		canonicalName := strings.Replace(name, "\\", "/", -1)
+		pathList := strings.Split(canonicalName, "/")
+		for _, p := range pathList {
+			node = node.Children[p]
+			if node == nil {
+				return nil, fmt.Errorf("Asset %s not found", name)
+			}
+		}
+	}
+	if node.Func != nil {
+		return nil, fmt.Errorf("Asset %s not found", name)
+	}
+	rv := make([]string, 0, len(node.Children))
+	for childName := range node.Children {
+		rv = append(rv, childName)
+	}
+	return rv, nil
+}
+
+type bintree struct {
+	Func     func() (*asset, error)
+	Children map[string]*bintree
+}
+
+var _bintree = &bintree{nil, map[string]*bintree{
+	"4byte_tracer.js":    {_4byte_tracerJs, map[string]*bintree{}},
+	"bigram_tracer.js":   {bigram_tracerJs, map[string]*bintree{}},
+	"call_tracer.js":     {call_tracerJs, map[string]*bintree{}},
+	"evmdis_tracer.js":   {evmdis_tracerJs, map[string]*bintree{}},
+	"noop_tracer.js":     {noop_tracerJs, map[string]*bintree{}},
+	"opcount_tracer.js":  {opcount_tracerJs, map[string]*bintree{}},
+	"prestate_tracer.js": {prestate_tracerJs, map[string]*bintree{}},
+	"trigram_tracer.js":  {trigram_tracerJs, map[string]*bintree{}},
+	"unigram_tracer.js":  {unigram_tracerJs, map[string]*bintree{}},
+}}
+
+// RestoreAsset restores an asset under the given directory.
+func RestoreAsset(dir, name string) error {
+	data, err := Asset(name)
+	if err != nil {
+		return err
+	}
+	info, err := AssetInfo(name)
+	if err != nil {
+		return err
+	}
+	err = os.MkdirAll(_filePath(dir, filepath.Dir(name)), os.FileMode(0755))
+	if err != nil {
+		return err
+	}
+	err = ioutil.WriteFile(_filePath(dir, name), data, info.Mode())
+	if err != nil {
+		return err
+	}
+	return os.Chtimes(_filePath(dir, name), info.ModTime(), info.ModTime())
+}
+
+// RestoreAssets restores an asset under the given directory recursively.
+func RestoreAssets(dir, name string) error {
+	children, err := AssetDir(name)
+	// File
+	if err != nil {
+		return RestoreAsset(dir, name)
+	}
+	// Dir
+	for _, child := range children {
+		err = RestoreAssets(dir, filepath.Join(name, child))
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func _filePath(dir, name string) string {
+	canonicalName := strings.Replace(name, "\\", "/", -1)
+	return filepath.Join(append([]string{dir}, strings.Split(canonicalName, "/")...)...)
+}
diff --git a/eth/tracers/internal/tracers/bigram_tracer.js b/eth/tracers/internal/tracers/bigram_tracer.js
new file mode 100644
index 0000000..421c360
--- /dev/null
+++ b/eth/tracers/internal/tracers/bigram_tracer.js
@@ -0,0 +1,47 @@
+// Copyright 2018 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/>.
+
+{
+    // hist is the counters of opcode bigrams
+    hist: {},
+    // lastOp is last operation
+    lastOp: '',
+    // execution depth of last op
+    lastDepth: 0,
+    // step is invoked for every opcode that the VM executes.
+    step: function(log, db) {
+        var op = log.op.toString();
+        var depth = log.getDepth();
+        if (depth == this.lastDepth){
+            var key = this.lastOp+'-'+op;
+            if (this.hist[key]){
+                this.hist[key]++;
+            }
+            else {
+                this.hist[key] = 1;
+            }
+        }
+        this.lastOp = op;
+        this.lastDepth = depth;
+    },
+    // fault is invoked when the actual execution of an opcode fails.
+    fault: function(log, db) {},
+    // result is invoked when all the opcodes have been iterated over and returns
+    // the final result of the tracing.
+    result: function(ctx) {
+        return this.hist;
+    },
+}
diff --git a/eth/tracers/internal/tracers/call_tracer.js b/eth/tracers/internal/tracers/call_tracer.js
new file mode 100644
index 0000000..f8b383c
--- /dev/null
+++ b/eth/tracers/internal/tracers/call_tracer.js
@@ -0,0 +1,246 @@
+// Copyright 2017 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/>.
+
+// callTracer is a full blown transaction tracer that extracts and reports all
+// the internal calls made by a transaction, along with any useful information.
+{
+	// callstack is the current recursive call stack of the EVM execution.
+	callstack: [{}],
+
+	// descended tracks whether we've just descended from an outer transaction into
+	// an inner call.
+	descended: false,
+
+	// step is invoked for every opcode that the VM executes.
+	step: function(log, db) {
+		// Capture any errors immediately
+		var error = log.getError();
+		if (error !== undefined) {
+			this.fault(log, db);
+			return;
+		}
+		// We only care about system opcodes, faster if we pre-check once
+		var syscall = (log.op.toNumber() & 0xf0) == 0xf0;
+		if (syscall) {
+			var op = log.op.toString();
+		}
+		// If a new contract is being created, add to the call stack
+		if (syscall && (op == 'CREATE' || op == "CREATE2")) {
+			var inOff = log.stack.peek(1).valueOf();
+			var inEnd = inOff + log.stack.peek(2).valueOf();
+
+			// Assemble the internal call report and store for completion
+			var call = {
+				type:    op,
+				from:    toHex(log.contract.getAddress()),
+				input:   toHex(log.memory.slice(inOff, inEnd)),
+				gasIn:   log.getGas(),
+				gasCost: log.getCost(),
+				value:   '0x' + log.stack.peek(0).toString(16)
+			};
+			this.callstack.push(call);
+			this.descended = true
+			return;
+		}
+		// If a contract is being self destructed, gather that as a subcall too
+		if (syscall && op == 'SELFDESTRUCT') {
+			var left = this.callstack.length;
+			if (this.callstack[left-1].calls === undefined) {
+				this.callstack[left-1].calls = [];
+			}
+			this.callstack[left-1].calls.push({type: op});
+			return
+		}
+		// If a new method invocation is being done, add to the call stack
+		if (syscall && (op == 'CALL' || op == 'CALLCODE' || op == 'DELEGATECALL' || op == 'STATICCALL')) {
+			// Skip any pre-compile invocations, those are just fancy opcodes
+			var to = toAddress(log.stack.peek(1).toString(16));
+			if (isPrecompiled(to)) {
+				return
+			}
+			var off = (op == 'DELEGATECALL' || op == 'STATICCALL' ? 0 : 1);
+
+			var inOff = log.stack.peek(2 + off).valueOf();
+			var inEnd = inOff + log.stack.peek(3 + off).valueOf();
+
+			// Assemble the internal call report and store for completion
+			var call = {
+				type:    op,
+				from:    toHex(log.contract.getAddress()),
+				to:      toHex(to),
+				input:   toHex(log.memory.slice(inOff, inEnd)),
+				gasIn:   log.getGas(),
+				gasCost: log.getCost(),
+				outOff:  log.stack.peek(4 + off).valueOf(),
+				outLen:  log.stack.peek(5 + off).valueOf()
+			};
+			if (op != 'DELEGATECALL' && op != 'STATICCALL') {
+				call.value = '0x' + log.stack.peek(2).toString(16);
+			}
+			this.callstack.push(call);
+			this.descended = true
+			return;
+		}
+		// If we've just descended into an inner call, retrieve it's true allowance. We
+		// need to extract if from within the call as there may be funky gas dynamics
+		// with regard to requested and actually given gas (2300 stipend, 63/64 rule).
+		if (this.descended) {
+			if (log.getDepth() >= this.callstack.length) {
+				this.callstack[this.callstack.length - 1].gas = log.getGas();
+			} else {
+				// TODO(karalabe): The call was made to a plain account. We currently don't
+				// have access to the true gas amount inside the call and so any amount will
+				// mostly be wrong since it depends on a lot of input args. Skip gas for now.
+			}
+			this.descended = false;
+		}
+		// If an existing call is returning, pop off the call stack
+		if (syscall && op == 'REVERT') {
+			this.callstack[this.callstack.length - 1].error = "execution reverted";
+			return;
+		}
+		if (log.getDepth() == this.callstack.length - 1) {
+			// Pop off the last call and get the execution results
+			var call = this.callstack.pop();
+
+			if (call.type == 'CREATE' || call.type == "CREATE2") {
+				// If the call was a CREATE, retrieve the contract address and output code
+				call.gasUsed = '0x' + bigInt(call.gasIn - call.gasCost - log.getGas()).toString(16);
+				delete call.gasIn; delete call.gasCost;
+
+				var ret = log.stack.peek(0);
+				if (!ret.equals(0)) {
+					call.to     = toHex(toAddress(ret.toString(16)));
+					call.output = toHex(db.getCode(toAddress(ret.toString(16))));
+				} else if (call.error === undefined) {
+					call.error = "internal failure"; // TODO(karalabe): surface these faults somehow
+				}
+			} else {
+				// If the call was a contract call, retrieve the gas usage and output
+				if (call.gas !== undefined) {
+					call.gasUsed = '0x' + bigInt(call.gasIn - call.gasCost + call.gas - log.getGas()).toString(16);
+
+					var ret = log.stack.peek(0);
+					if (!ret.equals(0)) {
+						call.output = toHex(log.memory.slice(call.outOff, call.outOff + call.outLen));
+					} else if (call.error === undefined) {
+						call.error = "internal failure"; // TODO(karalabe): surface these faults somehow
+					}
+				}
+				delete call.gasIn; delete call.gasCost;
+				delete call.outOff; delete call.outLen;
+			}
+			if (call.gas !== undefined) {
+				call.gas = '0x' + bigInt(call.gas).toString(16);
+			}
+			// Inject the call into the previous one
+			var left = this.callstack.length;
+			if (this.callstack[left-1].calls === undefined) {
+				this.callstack[left-1].calls = [];
+			}
+			this.callstack[left-1].calls.push(call);
+		}
+	},
+
+	// fault is invoked when the actual execution of an opcode fails.
+	fault: function(log, db) {
+		// If the topmost call already reverted, don't handle the additional fault again
+		if (this.callstack[this.callstack.length - 1].error !== undefined) {
+			return;
+		}
+		// Pop off the just failed call
+		var call = this.callstack.pop();
+		call.error = log.getError();
+
+		// Consume all available gas and clean any leftovers
+		if (call.gas !== undefined) {
+			call.gas = '0x' + bigInt(call.gas).toString(16);
+			call.gasUsed = call.gas
+		}
+		delete call.gasIn; delete call.gasCost;
+		delete call.outOff; delete call.outLen;
+
+		// Flatten the failed call into its parent
+		var left = this.callstack.length;
+		if (left > 0) {
+			if (this.callstack[left-1].calls === undefined) {
+				this.callstack[left-1].calls = [];
+			}
+			this.callstack[left-1].calls.push(call);
+			return;
+		}
+		// Last call failed too, leave it in the stack
+		this.callstack.push(call);
+	},
+
+	// result is invoked when all the opcodes have been iterated over and returns
+	// the final result of the tracing.
+	result: function(ctx, db) {
+		var result = {
+			type:    ctx.type,
+			from:    toHex(ctx.from),
+			to:      toHex(ctx.to),
+			value:   '0x' + ctx.value.toString(16),
+			gas:     '0x' + bigInt(ctx.gas).toString(16),
+			gasUsed: '0x' + bigInt(ctx.gasUsed).toString(16),
+			input:   toHex(ctx.input),
+			output:  toHex(ctx.output),
+			time:    ctx.time,
+		};
+		if (this.callstack[0].calls !== undefined) {
+			result.calls = this.callstack[0].calls;
+		}
+		if (this.callstack[0].error !== undefined) {
+			result.error = this.callstack[0].error;
+		} else if (ctx.error !== undefined) {
+			result.error = ctx.error;
+		}
+		if (result.error !== undefined) {
+			delete result.output;
+		}
+		return this.finalize(result);
+	},
+
+	// finalize recreates a call object using the final desired field oder for json
+	// serialization. This is a nicety feature to pass meaningfully ordered results
+	// to users who don't interpret it, just display it.
+	finalize: function(call) {
+		var sorted = {
+			type:    call.type,
+			from:    call.from,
+			to:      call.to,
+			value:   call.value,
+			gas:     call.gas,
+			gasUsed: call.gasUsed,
+			input:   call.input,
+			output:  call.output,
+			error:   call.error,
+			time:    call.time,
+			calls:   call.calls,
+		}
+		for (var key in sorted) {
+			if (sorted[key] === undefined) {
+				delete sorted[key];
+			}
+		}
+		if (sorted.calls !== undefined) {
+			for (var i=0; i<sorted.calls.length; i++) {
+				sorted.calls[i] = this.finalize(sorted.calls[i]);
+			}
+		}
+		return sorted;
+	}
+}
diff --git a/eth/tracers/internal/tracers/evmdis_tracer.js b/eth/tracers/internal/tracers/evmdis_tracer.js
new file mode 100644
index 0000000..bb19777
--- /dev/null
+++ b/eth/tracers/internal/tracers/evmdis_tracer.js
@@ -0,0 +1,93 @@
+// Copyright 2017 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/>.
+
+// evmdisTracer returns sufficient information from a trace to perform evmdis-style
+// disassembly.
+{
+	stack: [{ops: []}],
+
+	npushes: {0: 0, 1: 1, 2: 1, 3: 1, 4: 1, 5: 1, 6: 1, 7: 1, 8: 1, 9: 1, 10: 1, 11: 1, 16: 1, 17: 1, 18: 1, 19: 1, 20: 1, 21: 1, 22: 1, 23: 1, 24: 1, 25: 1, 26: 1, 32: 1, 48: 1, 49: 1, 50: 1, 51: 1, 52: 1, 53: 1, 54: 1, 55: 0, 56: 1, 57: 0, 58: 1, 59: 1, 60: 0, 64: 1, 65: 1, 66: 1, 67: 1, 68: 1, 69: 1, 80: 0, 81: 1, 82: 0, 83: 0, 84: 1, 85: 0, 86: 0, 87: 0, 88: 1, 89: 1, 90: 1, 91: 0, 96: 1, 97: 1, 98: 1, 99: 1, 100: 1, 101: 1, 102: 1, 103: 1, 104: 1, 105: 1, 106: 1, 107: 1, 108: 1, 109: 1, 110: 1, 111: 1, 112: 1, 113: 1, 114: 1, 115: 1, 116: 1, 117: 1, 118: 1, 119: 1, 120: 1, 121: 1, 122: 1, 123: 1, 124: 1, 125: 1, 126: 1, 127: 1, 128: 2, 129: 3, 130: 4, 131: 5, 132: 6, 133: 7, 134: 8, 135: 9, 136: 10, 137: 11, 138: 12, 139: 13, 140: 14, 141: 15, 142: 16, 143: 17, 144: 2, 145: 3, 146: 4, 147: 5, 148: 6, 149: 7, 150: 8, 151: 9, 152: 10, 153: 11, 154: 12, 155: 13, 156: 14, 157: 15, 158: 16, 159: 17, 160: 0, 161: 0, 162: 0, 163: 0, 164: 0, 240: 1, 241: 1, 242: 1, 243: 0, 244: 0, 255: 0},
+
+	// result is invoked when all the opcodes have been iterated over and returns
+	// the final result of the tracing.
+	result: function() { return this.stack[0].ops; },
+
+	// fault is invoked when the actual execution of an opcode fails.
+	fault: function(log, db) { },
+
+	// step is invoked for every opcode that the VM executes.
+	step: function(log, db) {
+		var frame = this.stack[this.stack.length - 1];
+
+		var error = log.getError();
+		if (error) {
+			frame["error"] = error;
+		} else if (log.getDepth() == this.stack.length) {
+			opinfo = {
+				op:     log.op.toNumber(),
+				depth : log.getDepth(),
+				result: [],
+			};
+			if (frame.ops.length > 0) {
+				var prevop = frame.ops[frame.ops.length - 1];
+				for(var i = 0; i < this.npushes[prevop.op]; i++)
+					prevop.result.push(log.stack.peek(i).toString(16));
+			}
+			switch(log.op.toString()) {
+			case "CALL": case "CALLCODE":
+				var instart = log.stack.peek(3).valueOf();
+				var insize = log.stack.peek(4).valueOf();
+				opinfo["gas"] = log.stack.peek(0).valueOf();
+				opinfo["to"] = log.stack.peek(1).toString(16);
+				opinfo["value"] = log.stack.peek(2).toString();
+				opinfo["input"] = log.memory.slice(instart, instart + insize);
+				opinfo["error"] = null;
+				opinfo["return"] = null;
+				opinfo["ops"] = [];
+				this.stack.push(opinfo);
+				break;
+			case "DELEGATECALL": case "STATICCALL":
+				var instart = log.stack.peek(2).valueOf();
+				var insize = log.stack.peek(3).valueOf();
+				opinfo["op"] =  log.op.toString();
+				opinfo["gas"] =  log.stack.peek(0).valueOf();
+				opinfo["to"] =  log.stack.peek(1).toString(16);
+				opinfo["input"] =  log.memory.slice(instart, instart + insize);
+				opinfo["error"] =  null;
+				opinfo["return"] =  null;
+				opinfo["ops"] = [];
+				this.stack.push(opinfo);
+				break;
+			case "RETURN":
+				var out = log.stack.peek(0).valueOf();
+				var outsize = log.stack.peek(1).valueOf();
+				frame.return = log.memory.slice(out, out + outsize);
+				break;
+			case "STOP": case "SUICIDE":
+				frame.return = log.memory.slice(0, 0);
+				break;
+			case "JUMPDEST":
+				opinfo["pc"] = log.getPC();
+			}
+			if(log.op.isPush()) {
+				opinfo["len"] = log.op.toNumber() - 0x5e;
+			}
+			frame.ops.push(opinfo);
+		} else {
+			this.stack = this.stack.slice(0, log.getDepth());
+		}
+	}
+}
diff --git a/eth/tracers/internal/tracers/noop_tracer.js b/eth/tracers/internal/tracers/noop_tracer.js
new file mode 100644
index 0000000..fe7ddc8
--- /dev/null
+++ b/eth/tracers/internal/tracers/noop_tracer.js
@@ -0,0 +1,29 @@
+// Copyright 2017 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/>.
+
+// noopTracer is just the barebone boilerplate code required from a JavaScript
+// object to be usable as a transaction tracer.
+{
+	// step is invoked for every opcode that the VM executes.
+	step: function(log, db) { },
+
+	// fault is invoked when the actual execution of an opcode fails.
+	fault: function(log, db) { },
+
+	// result is invoked when all the opcodes have been iterated over and returns
+	// the final result of the tracing.
+	result: function(ctx, db) { return {}; }
+}
diff --git a/eth/tracers/internal/tracers/opcount_tracer.js b/eth/tracers/internal/tracers/opcount_tracer.js
new file mode 100644
index 0000000..f7984c7
--- /dev/null
+++ b/eth/tracers/internal/tracers/opcount_tracer.js
@@ -0,0 +1,32 @@
+// Copyright 2017 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/>.
+
+// opcountTracer is a sample tracer that just counts the number of instructions
+// executed by the EVM before the transaction terminated.
+{
+	// count tracks the number of EVM instructions executed.
+	count: 0,
+
+	// step is invoked for every opcode that the VM executes.
+	step: function(log, db) { this.count++ },
+
+	// fault is invoked when the actual execution of an opcode fails.
+	fault: function(log, db) { },
+
+	// result is invoked when all the opcodes have been iterated over and returns
+	// the final result of the tracing.
+	result: function(ctx, db) { return this.count }
+}
diff --git a/eth/tracers/internal/tracers/prestate_tracer.js b/eth/tracers/internal/tracers/prestate_tracer.js
new file mode 100644
index 0000000..e0a22bf
--- /dev/null
+++ b/eth/tracers/internal/tracers/prestate_tracer.js
@@ -0,0 +1,108 @@
+// Copyright 2017 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/>.
+
+// prestateTracer outputs sufficient information to create a local execution of
+// the transaction from a custom assembled genesis block.
+{
+	// prestate is the genesis that we're building.
+	prestate: null,
+
+	// lookupAccount injects the specified account into the prestate object.
+	lookupAccount: function(addr, db){
+		var acc = toHex(addr);
+		if (this.prestate[acc] === undefined) {
+			this.prestate[acc] = {
+				balance: '0x' + db.getBalance(addr).toString(16),
+				nonce:   db.getNonce(addr),
+				code:    toHex(db.getCode(addr)),
+				storage: {}
+			};
+		}
+	},
+
+	// lookupStorage injects the specified storage entry of the given account into
+	// the prestate object.
+	lookupStorage: function(addr, key, db){
+		var acc = toHex(addr);
+		var idx = toHex(key);
+
+		if (this.prestate[acc].storage[idx] === undefined) {
+			this.prestate[acc].storage[idx] = toHex(db.getState(addr, key));
+		}
+	},
+
+	// result is invoked when all the opcodes have been iterated over and returns
+	// the final result of the tracing.
+	result: function(ctx, db) {
+		// At this point, we need to deduct the 'value' from the
+		// outer transaction, and move it back to the origin
+		this.lookupAccount(ctx.from, db);
+
+		var fromBal = bigInt(this.prestate[toHex(ctx.from)].balance.slice(2), 16);
+		var toBal   = bigInt(this.prestate[toHex(ctx.to)].balance.slice(2), 16);
+
+		this.prestate[toHex(ctx.to)].balance   = '0x'+toBal.subtract(ctx.value).toString(16);
+		this.prestate[toHex(ctx.from)].balance = '0x'+fromBal.add(ctx.value).toString(16);
+
+		// Decrement the caller's nonce, and remove empty create targets
+		this.prestate[toHex(ctx.from)].nonce--;
+		if (ctx.type == 'CREATE') {
+			// We can blibdly delete the contract prestate, as any existing state would
+			// have caused the transaction to be rejected as invalid in the first place.
+			delete this.prestate[toHex(ctx.to)];
+		}
+		// Return the assembled allocations (prestate)
+		return this.prestate;
+	},
+
+	// step is invoked for every opcode that the VM executes.
+	step: function(log, db) {
+		// Add the current account if we just started tracing
+		if (this.prestate === null){
+			this.prestate = {};
+			// Balance will potentially be wrong here, since this will include the value
+			// sent along with the message. We fix that in 'result()'.
+			this.lookupAccount(log.contract.getAddress(), db);
+		}
+		// Whenever new state is accessed, add it to the prestate
+		switch (log.op.toString()) {
+			case "EXTCODECOPY": case "EXTCODESIZE": case "BALANCE":
+				this.lookupAccount(toAddress(log.stack.peek(0).toString(16)), db);
+				break;
+			case "CREATE":
+				var from = log.contract.getAddress();
+				this.lookupAccount(toContract(from, db.getNonce(from)), db);
+				break;
+			case "CREATE2":
+				var from = log.contract.getAddress();
+				// stack: salt, size, offset, endowment
+				var offset = log.stack.peek(1).valueOf()
+				var size = log.stack.peek(2).valueOf()
+				var end = offset + size
+				this.lookupAccount(toContract2(from, log.stack.peek(3).toString(16), log.memory.slice(offset, end)), db);
+				break;
+			case "CALL": case "CALLCODE": case "DELEGATECALL": case "STATICCALL":
+				this.lookupAccount(toAddress(log.stack.peek(1).toString(16)), db);
+				break;
+			case 'SSTORE':case 'SLOAD':
+				this.lookupStorage(log.contract.getAddress(), toWord(log.stack.peek(0).toString(16)), db);
+				break;
+		}
+	},
+
+	// fault is invoked when the actual execution of an opcode fails.
+	fault: function(log, db) {}
+}
diff --git a/eth/tracers/internal/tracers/tracers.go b/eth/tracers/internal/tracers/tracers.go
new file mode 100644
index 0000000..2e40975
--- /dev/null
+++ b/eth/tracers/internal/tracers/tracers.go
@@ -0,0 +1,21 @@
+// Copyright 2017 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/>.
+
+//go:generate go-bindata -nometadata -o assets.go -pkg tracers -ignore tracers.go -ignore assets.go ./...
+//go:generate gofmt -s -w assets.go
+
+// Package tracers contains the actual JavaScript tracer assets.
+package tracers
diff --git a/eth/tracers/internal/tracers/trigram_tracer.js b/eth/tracers/internal/tracers/trigram_tracer.js
new file mode 100644
index 0000000..8756490
--- /dev/null
+++ b/eth/tracers/internal/tracers/trigram_tracer.js
@@ -0,0 +1,49 @@
+// Copyright 2018 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/>.
+
+{
+    // hist is the map of trigram counters
+    hist: {},
+    // lastOp is last operation
+    lastOps: ['',''],
+    lastDepth: 0,
+        // step is invoked for every opcode that the VM executes.
+    step: function(log, db) {
+        var depth = log.getDepth();
+        if (depth != this.lastDepth){
+            this.lastOps = ['',''];
+            this.lastDepth = depth;
+            return;
+        }
+        var op = log.op.toString();
+        var key = this.lastOps[0]+'-'+this.lastOps[1]+'-'+op;
+        if (this.hist[key]){
+            this.hist[key]++;
+        }
+        else {
+            this.hist[key] = 1;
+        }
+        this.lastOps[0] = this.lastOps[1];
+        this.lastOps[1] = op;
+    },
+    // fault is invoked when the actual execution of an opcode fails.
+    fault: function(log, db) {},
+    // result is invoked when all the opcodes have been iterated over and returns
+    // the final result of the tracing.
+    result: function(ctx) {
+        return this.hist;
+    },
+}
diff --git a/eth/tracers/internal/tracers/unigram_tracer.js b/eth/tracers/internal/tracers/unigram_tracer.js
new file mode 100644
index 0000000..000fb13
--- /dev/null
+++ b/eth/tracers/internal/tracers/unigram_tracer.js
@@ -0,0 +1,43 @@
+// Copyright 2018 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/>.
+
+{
+    // hist is the map of opcodes to counters
+    hist: {},
+    // nops counts number of ops
+    nops: 0,
+    // step is invoked for every opcode that the VM executes.
+    step: function(log, db) {
+        var op = log.op.toString();
+        if (this.hist[op]){
+            this.hist[op]++;
+        }
+        else {
+            this.hist[op] = 1;
+        }
+        this.nops++;
+    },
+    // fault is invoked when the actual execution of an opcode fails.
+    fault: function(log, db) {},
+
+    // result is invoked when all the opcodes have been iterated over and returns
+    // the final result of the tracing.
+    result: function(ctx) {
+        if(this.nops > 0){
+            return this.hist;
+        }
+    },
+}
diff --git a/eth/tracers/testdata/call_tracer_create.json b/eth/tracers/testdata/call_tracer_create.json
new file mode 100644
index 0000000..8699bf3
--- /dev/null
+++ b/eth/tracers/testdata/call_tracer_create.json
@@ -0,0 +1,58 @@
+{
+  "context": {
+    "difficulty": "3755480783",
+    "gasLimit": "5401723",
+    "miner": "0xd049bfd667cb46aa3ef5df0da3e57db3be39e511",
+    "number": "2294702",
+    "timestamp": "1513676146"
+  },
+  "genesis": {
+    "alloc": {
+      "0x13e4acefe6a6700604929946e70e6443e4e73447": {
+        "balance": "0xcf3e0938579f000",
+        "code": "0x",
+        "nonce": "9",
+        "storage": {}
+      },
+      "0x7dc9c9730689ff0b0fd506c67db815f12d90a448": {
+        "balance": "0x0",
+        "code": "0x",
+        "nonce": "0",
+        "storage": {}
+      }
+    },
+    "config": {
+      "byzantiumBlock": 1700000,
+      "chainId": 3,
+      "daoForkSupport": true,
+      "eip150Block": 0,
+      "eip150Hash": "0x41941023680923e0fe4d74a34bdac8141f2540e3ae90623718e47d66d1ca4a2d",
+      "eip155Block": 10,
+      "eip158Block": 10,
+      "ethash": {},
+      "homesteadBlock": 0
+    },
+    "difficulty": "3757315409",
+    "extraData": "0x566961425443",
+    "gasLimit": "5406414",
+    "hash": "0xae107f592eebdd9ff8d6ba00363676096e6afb0e1007a7d3d0af88173077378d",
+    "miner": "0xd049bfd667cb46aa3ef5df0da3e57db3be39e511",
+    "mixHash": "0xc927aa05a38bc3de864e95c33b3ae559d3f39c4ccd51cef6f113f9c50ba0caf1",
+    "nonce": "0x93363bbd2c95f410",
+    "number": "2294701",
+    "stateRoot": "0x6b6737d5bde8058990483e915866bd1578014baeff57bd5e4ed228a2bfad635c",
+    "timestamp": "1513676127",
+    "totalDifficulty": "7160808139332585"
+  },
+  "input": "0xf907ef098504e3b29200830897be8080b9079c606060405260405160208061077c83398101604052808051906020019091905050600160009054906101000a900473ffffffffffffffffffffffffffffffffffffffff1673ffffffffffffffffffffffffffffffffffffffff163373ffffffffffffffffffffffffffffffffffffffff161415151561007d57600080fd5b336000806101000a81548173ffffffffffffffffffffffffffffffffffffffff021916908373ffffffffffffffffffffffffffffffffffffffff16021790555080600160006101000a81548173ffffffffffffffffffffffffffffffffffffffff021916908373ffffffffffffffffffffffffffffffffffffffff1602179055506001600460006101000a81548160ff02191690831515021790555050610653806101296000396000f300606060405260043610610083576000357c0100000000000000000000000000000000000000000000000000000000900463ffffffff16806305e4382a146100855780631c02708d146100ae5780632e1a7d4d146100c35780635114cb52146100e6578063a37dda2c146100fe578063ae200e7914610153578063b5769f70146101a8575b005b341561009057600080fd5b6100986101d1565b6040518082815260200191505060405180910390f35b34156100b957600080fd5b6100c16101d7565b005b34156100ce57600080fd5b6100e460048080359060200190919050506102eb565b005b6100fc6004808035906020019091905050610513565b005b341561010957600080fd5b6101116105d6565b604051808273ffffffffffffffffffffffffffffffffffffffff1673ffffffffffffffffffffffffffffffffffffffff16815260200191505060405180910390f35b341561015e57600080fd5b6101666105fc565b604051808273ffffffffffffffffffffffffffffffffffffffff1673ffffffffffffffffffffffffffffffffffffffff16815260200191505060405180910390f35b34156101b357600080fd5b6101bb610621565b6040518082815260200191505060405180910390f35b60025481565b60011515600460009054906101000a900460ff1615151415156101f957600080fd5b6000809054906101000a900473ffffffffffffffffffffffffffffffffffffffff1673ffffffffffffffffffffffffffffffffffffffff163373ffffffffffffffffffffffffffffffffffffffff1614806102a15750600160009054906101000a900473ffffffffffffffffffffffffffffffffffffffff1673ffffffffffffffffffffffffffffffffffffffff163373ffffffffffffffffffffffffffffffffffffffff16145b15156102ac57600080fd5b6000600460006101000a81548160ff0219169083151502179055506003543073ffffffffffffffffffffffffffffffffffffffff163103600281905550565b6000809054906101000a900473ffffffffffffffffffffffffffffffffffffffff1673ffffffffffffffffffffffffffffffffffffffff163373ffffffffffffffffffffffffffffffffffffffff1614806103935750600160009054906101000a900473ffffffffffffffffffffffffffffffffffffffff1673ffffffffffffffffffffffffffffffffffffffff163373ffffffffffffffffffffffffffffffffffffffff16145b151561039e57600080fd5b6000809054906101000a900473ffffffffffffffffffffffffffffffffffffffff1673ffffffffffffffffffffffffffffffffffffffff163373ffffffffffffffffffffffffffffffffffffffff16141561048357600060025411801561040757506002548111155b151561041257600080fd5b80600254036002819055506000809054906101000a900473ffffffffffffffffffffffffffffffffffffffff1673ffffffffffffffffffffffffffffffffffffffff166108fc829081150290604051600060405180830381858888f19350505050151561047e57600080fd5b610510565b600060035411801561049757506003548111155b15156104a257600080fd5b8060035403600381905550600160009054906101000a900473ffffffffffffffffffffffffffffffffffffffff1673ffffffffffffffffffffffffffffffffffffffff166108fc829081150290604051600060405180830381858888f19350505050151561050f57600080fd5b5b50565b60011515600460009054906101000a900460ff16151514151561053557600080fd5b6000809054906101000a900473ffffffffffffffffffffffffffffffffffffffff1673ffffffffffffffffffffffffffffffffffffffff163373ffffffffffffffffffffffffffffffffffffffff1614801561059657506003548160035401115b80156105bd575080600354013073ffffffffffffffffffffffffffffffffffffffff163110155b15156105c857600080fd5b806003540160038190555050565b600160009054906101000a900473ffffffffffffffffffffffffffffffffffffffff1681565b6000809054906101000a900473ffffffffffffffffffffffffffffffffffffffff1681565b600354815600a165627a7a72305820c3b849e8440987ce43eae3097b77672a69234d516351368b03fe5b7de03807910029000000000000000000000000c65e620a3a55451316168d57e268f5702ef56a1129a01060f46676a5dff6f407f0f51eb6f37f5c8c54e238c70221e18e65fc29d3ea65a0557b01c50ff4ffaac8ed6e5d31237a4ecbac843ab1bfe8bb0165a0060df7c54f",
+  "result": {
+    "from": "0x13e4acefe6a6700604929946e70e6443e4e73447",
+    "gas": "0x5e106",
+    "gasUsed": "0x5e106",
+    "input": "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",
+    "output": "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",
+    "to": "0x7dc9c9730689ff0b0fd506c67db815f12d90a448",
+    "type": "CREATE",
+    "value": "0x0"
+  }
+}
diff --git a/eth/tracers/testdata/call_tracer_deep_calls.json b/eth/tracers/testdata/call_tracer_deep_calls.json
new file mode 100644
index 0000000..0353d4c
--- /dev/null
+++ b/eth/tracers/testdata/call_tracer_deep_calls.json
@@ -0,0 +1,415 @@
+{
+  "context": {
+    "difficulty": "117066904",
+    "gasLimit": "4712384",
+    "miner": "0x1977c248e1014cc103929dd7f154199c916e39ec",
+    "number": "25001",
+    "timestamp": "1479891545"
+  },
+  "genesis": {
+    "alloc": {
+      "0x2a98c5f40bfa3dee83431103c535f6fae9a8ad38": {
+        "balance": "0x0",
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+}
diff --git a/eth/tracers/testdata/call_tracer_delegatecall.json b/eth/tracers/testdata/call_tracer_delegatecall.json
new file mode 100644
index 0000000..f7ad6df
--- /dev/null
+++ b/eth/tracers/testdata/call_tracer_delegatecall.json
@@ -0,0 +1,97 @@
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+    "difficulty": "31912170",
+    "extraData": "0xd783010502846765746887676f312e372e33856c696e7578",
+    "gasLimit": "4712388",
+    "hash": "0x0855914bdc581bccdc62591fd438498386ffb59ea4d5361ed5c3702e26e2c72f",
+    "miner": "0x334391aa808257952a462d1475562ee2106a6c90",
+    "mixHash": "0x64bb70b8ca883cadb8fbbda2c70a861612407864089ed87b98e5de20acceada6",
+    "nonce": "0x684129f283aaef18",
+    "number": "11494",
+    "stateRoot": "0x7057f31fe3dab1d620771adad35224aae43eb70e94861208bc84c557ff5b9d10",
+    "timestamp": "1479735912",
+    "totalDifficulty": "90744064339"
+  },
+  "input": "0xf889448504a817c800832dc6c094269296dddce321a6bcbaa2f0181127593d732cba80a47065cb480000000000000000000000001523e55a1ca4efbae03355775ae89f8d7699ad9e29a080ed81e4c5e9971a730efab4885566e2c868cd80bd4166d0ed8c287fdf181650a069d7c49215e3d4416ad239cd09dbb71b9f04c16b33b385d14f40b618a7a65115",
+  "result": {
+    "calls": [
+      {
+        "calls": [
+          {
+            "from": "0x13204f5d64c28326fd7bd05fd4ea855302d7f2ff",
+            "gas": "0x2bf459",
+            "gasUsed": "0x2aa",
+            "input": "0x7d65837a0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000a529806c67cc6486d4d62024471772f47f6fd672",
+            "output": "0x0000000000000000000000000000000000000000000000000000000000000001",
+            "to": "0x42b02b5deeb78f34cd5ac896473b63e6c99a71a2",
+            "type": "DELEGATECALL"
+          }
+        ],
+        "from": "0x269296dddce321a6bcbaa2f0181127593d732cba",
+        "gas": "0x2cae73",
+        "gasUsed": "0xa9d",
+        "input": "0x5dbe47e8000000000000000000000000a529806c67cc6486d4d62024471772f47f6fd672",
+        "output": "0x0000000000000000000000000000000000000000000000000000000000000001",
+        "to": "0x13204f5d64c28326fd7bd05fd4ea855302d7f2ff",
+        "type": "CALL",
+        "value": "0x0"
+      }
+    ],
+    "from": "0xa529806c67cc6486d4d62024471772f47f6fd672",
+    "gas": "0x2d6e28",
+    "gasUsed": "0x64bd",
+    "input": "0x7065cb480000000000000000000000001523e55a1ca4efbae03355775ae89f8d7699ad9e",
+    "output": "0x",
+    "to": "0x269296dddce321a6bcbaa2f0181127593d732cba",
+    "type": "CALL",
+    "value": "0x0"
+  }
+}
diff --git a/eth/tracers/testdata/call_tracer_inner_create_oog_outer_throw.json b/eth/tracers/testdata/call_tracer_inner_create_oog_outer_throw.json
new file mode 100644
index 0000000..d1c8ac9
--- /dev/null
+++ b/eth/tracers/testdata/call_tracer_inner_create_oog_outer_throw.json
@@ -0,0 +1,77 @@
+{
+  "context": {
+    "difficulty": "3451177886",
+    "gasLimit": "4709286",
+    "miner": "0x1585936b53834b021f68cc13eeefdec2efc8e724",
+    "number": "2290744",
+    "timestamp": "1513616439"
+  },
+  "genesis": {
+    "alloc": {
+      "0x1d3ddf7caf024f253487e18bc4a15b1a360c170a": {
+        "balance": "0x0",
+        "code": 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+    "timestamp": "1513616414",
+    "totalDifficulty": "7146523769022564"
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+        "type": "CREATE",
+        "value": "0x0"
+      }
+    ],
+    "error": "evm: invalid jump destination",
+    "from": "0xe4a13bc304682a903e9472f469c33801dd18d9e8",
+    "gas": "0x435c8",
+    "gasUsed": "0x435c8",
+    "input": "0x3b91f506000000000000000000000000a14bdd7e5666d784dcce98ad24d383a6b1cd4182000000000000000000000000e4a13bc304682a903e9472f469c33801dd18d9e8",
+    "to": "0x1d3ddf7caf024f253487e18bc4a15b1a360c170a",
+    "type": "CALL",
+    "value": "0x0"
+  }
+}
diff --git a/eth/tracers/testdata/call_tracer_inner_throw_outer_revert.json b/eth/tracers/testdata/call_tracer_inner_throw_outer_revert.json
new file mode 100644
index 0000000..edd80e5
--- /dev/null
+++ b/eth/tracers/testdata/call_tracer_inner_throw_outer_revert.json
@@ -0,0 +1,81 @@
+{
+  "context": {
+    "difficulty": "3956606365",
+    "gasLimit": "5413248",
+    "miner": "0x00d8ae40d9a06d0e7a2877b62e32eb959afbe16d",
+    "number": "2295104",
+    "timestamp": "1513681256"
+  },
+  "genesis": {
+    "alloc": {
+      "0x33056b5dcac09a9b4becad0e1dcf92c19bd0af76": {
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+  "input": "0xf86d808504e3b292008307dfa69433056b5dcac09a9b4becad0e1dcf92c19bd0af76880e92596fd62900008029a0e5f27bb66431f7081bb7f1f242003056d7f3f35414c352cd3d1848b52716dac2a07d0be78980edb0bd2a0678fc53aa90ea9558ce346b0d947967216918ac74ccea",
+  "result": {
+    "calls": [
+      {
+        "error": "invalid opcode 0xfe",
+        "from": "0x33056b5dcac09a9b4becad0e1dcf92c19bd0af76",
+        "gas": "0x75fe3",
+        "gasUsed": "0x75fe3",
+        "input": "0xa9059cbb000000000000000000000000d4fcab9f0a6dc0493af47c864f6f17a8a5e2e82600000000000000000000000000000000000000000000000000000000000002f4",
+        "to": "0xe819f024b41358d2c08e3a868a5c5dd0566078d4",
+        "type": "CALL",
+        "value": "0x0"
+      }
+    ],
+    "error": "execution reverted",
+    "from": "0xd4fcab9f0a6dc0493af47c864f6f17a8a5e2e826",
+    "gas": "0x78d9e",
+    "gasUsed": "0x76fc0",
+    "input": "0x",
+    "to": "0x33056b5dcac09a9b4becad0e1dcf92c19bd0af76",
+    "type": "CALL",
+    "value": "0xe92596fd6290000"
+  }
+}
diff --git a/eth/tracers/testdata/call_tracer_oog.json b/eth/tracers/testdata/call_tracer_oog.json
new file mode 100644
index 0000000..de4fed6
--- /dev/null
+++ b/eth/tracers/testdata/call_tracer_oog.json
@@ -0,0 +1,60 @@
+{
+  "context": {
+    "difficulty": "3699098917",
+    "gasLimit": "5258985",
+    "miner": "0xd049bfd667cb46aa3ef5df0da3e57db3be39e511",
+    "number": "2294631",
+    "timestamp": "1513675366"
+  },
+  "genesis": {
+    "alloc": {
+      "0x43064693d3d38ad6a7cb579e0d6d9718c8aa6b62": {
+        "balance": "0x0",
+        "code": 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+        "nonce": "1",
+        "storage": {
+          "0x296b66049cc4f9c8bf3d4f14752add261d1a980b39bdd194a7897baf39ac7579": "0x0000000000000000000000000000000000000000033b2e3c9fc9653f9e72b1e0"
+        }
+      },
+      "0x94194bc2aaf494501d7880b61274a169f6502a54": {
+        "balance": "0xea8c39a876d19888d",
+        "code": "0x",
+        "nonce": "265",
+        "storage": {}
+      }
+    },
+    "config": {
+      "byzantiumBlock": 1700000,
+      "chainId": 3,
+      "daoForkSupport": true,
+      "eip150Block": 0,
+      "eip150Hash": "0x41941023680923e0fe4d74a34bdac8141f2540e3ae90623718e47d66d1ca4a2d",
+      "eip155Block": 10,
+      "eip158Block": 10,
+      "ethash": {},
+      "homesteadBlock": 0
+    },
+    "difficulty": "3699098917",
+    "extraData": "0x4554482e45544846414e532e4f52472d4641313738394444",
+    "gasLimit": "5263953",
+    "hash": "0x03a0f62a8106793dafcfae7b75fd2654322062d585a19cea568314d7205790dc",
+    "miner": "0xbbf5029fd710d227630c8b7d338051b8e76d50b3",
+    "mixHash": "0x15482cc64b7c00a947f5bf015dfc010db1a6a668c74df61974d6a7848c174408",
+    "nonce": "0xd1bdb150f6fd170e",
+    "number": "2294630",
+    "stateRoot": "0x1ab1a534e84cc787cda1db21e0d5920ab06017948075b759166cfea7274657a1",
+    "timestamp": "1513675347",
+    "totalDifficulty": "7160543502214733"
+  },
+  "input": "0xf8ab820109855d21dba00082ca1d9443064693d3d38ad6a7cb579e0d6d9718c8aa6b6280b844a9059cbb000000000000000000000000e77b1ac803616503510bed0086e3a7be2627a69900000000000000000000000000000000000000000000000000000009502f90001ba0ce3ad83f5530136467b7c2bb225f406bd170f4ad59c254e5103c34eeabb5bd69a0455154527224a42ab405cacf0fe92918a75641ce4152f8db292019a5527aa956",
+  "result": {
+    "error": "out of gas",
+    "from": "0x94194bc2aaf494501d7880b61274a169f6502a54",
+    "gas": "0x7045",
+    "gasUsed": "0x7045",
+    "input": "0xa9059cbb000000000000000000000000e77b1ac803616503510bed0086e3a7be2627a69900000000000000000000000000000000000000000000000000000009502f9000",
+    "to": "0x43064693d3d38ad6a7cb579e0d6d9718c8aa6b62",
+    "type": "CALL",
+    "value": "0x0"
+  }
+}
diff --git a/eth/tracers/testdata/call_tracer_revert.json b/eth/tracers/testdata/call_tracer_revert.json
new file mode 100644
index 0000000..059040a
--- /dev/null
+++ b/eth/tracers/testdata/call_tracer_revert.json
@@ -0,0 +1,58 @@
+{
+  "context": {
+    "difficulty": "3665057456",
+    "gasLimit": "5232723",
+    "miner": "0xf4d8e706cfb25c0decbbdd4d2e2cc10c66376a3f",
+    "number": "2294501",
+    "timestamp": "1513673601"
+  },
+  "genesis": {
+    "alloc": {
+      "0x0f6cef2b7fbb504782e35aa82a2207e816a2b7a9": {
+        "balance": "0x2a3fc32bcc019283",
+        "code": "0x",
+        "nonce": "10",
+        "storage": {}
+      },
+      "0xabbcd5b340c80b5f1c0545c04c987b87310296ae": {
+        "balance": "0x0",
+        "code": "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",
+        "nonce": "1",
+        "storage": {}
+      }
+    },
+    "config": {
+      "byzantiumBlock": 1700000,
+      "chainId": 3,
+      "daoForkSupport": true,
+      "eip150Block": 0,
+      "eip150Hash": "0x41941023680923e0fe4d74a34bdac8141f2540e3ae90623718e47d66d1ca4a2d",
+      "eip155Block": 10,
+      "eip158Block": 10,
+      "ethash": {},
+      "homesteadBlock": 0
+    },
+    "difficulty": "3672229776",
+    "extraData": "0x4554482e45544846414e532e4f52472d4641313738394444",
+    "gasLimit": "5227619",
+    "hash": "0xa07b3d6c6bf63f5f981016db9f2d1d93033833f2c17e8bf7209e85f1faf08076",
+    "miner": "0xbbf5029fd710d227630c8b7d338051b8e76d50b3",
+    "mixHash": "0x806e151ce2817be922e93e8d5921fa0f0d0fd213d6b2b9a3fa17458e74a163d0",
+    "nonce": "0xbc5d43adc2c30c7d",
+    "number": "2294500",
+    "stateRoot": "0xca645b335888352ef9d8b1ef083e9019648180b259026572e3139717270de97d",
+    "timestamp": "1513673552",
+    "totalDifficulty": "7160066586979149"
+  },
+  "input": "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",
+  "result": {
+    "error": "execution reverted",
+    "from": "0x0f6cef2b7fbb504782e35aa82a2207e816a2b7a9",
+    "gas": "0x2d55e8",
+    "gasUsed": "0xc3",
+    "input": "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",
+    "to": "0xabbcd5b340c80b5f1c0545c04c987b87310296ae",
+    "type": "CALL",
+    "value": "0x0"
+  }
+}
diff --git a/eth/tracers/testdata/call_tracer_simple.json b/eth/tracers/testdata/call_tracer_simple.json
new file mode 100644
index 0000000..b464321
--- /dev/null
+++ b/eth/tracers/testdata/call_tracer_simple.json
@@ -0,0 +1,78 @@
+{
+  "context": {
+    "difficulty": "3502894804",
+    "gasLimit": "4722976",
+    "miner": "0x1585936b53834b021f68cc13eeefdec2efc8e724",
+    "number": "2289806",
+    "timestamp": "1513601314"
+  },
+  "genesis": {
+    "alloc": {
+      "0x0024f658a46fbb89d8ac105e98d7ac7cbbaf27c5": {
+        "balance": "0x0",
+        "code": "0x",
+        "nonce": "22",
+        "storage": {}
+      },
+      "0x3b873a919aa0512d5a0f09e6dcceaa4a6727fafe": {
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+        "code": "0x",
+        "nonce": "29072",
+        "storage": {}
+      }
+    },
+    "config": {
+      "byzantiumBlock": 1700000,
+      "chainId": 3,
+      "daoForkSupport": true,
+      "eip150Block": 0,
+      "eip150Hash": "0x41941023680923e0fe4d74a34bdac8141f2540e3ae90623718e47d66d1ca4a2d",
+      "eip155Block": 10,
+      "eip158Block": 10,
+      "ethash": {},
+      "homesteadBlock": 0
+    },
+    "difficulty": "3509749784",
+    "extraData": "0x4554482e45544846414e532e4f52472d4641313738394444",
+    "gasLimit": "4727564",
+    "hash": "0x609948ac3bd3c00b7736b933248891d6c901ee28f066241bddb28f4e00a9f440",
+    "miner": "0xbbf5029fd710d227630c8b7d338051b8e76d50b3",
+    "mixHash": "0xb131e4507c93c7377de00e7c271bf409ec7492767142ff0f45c882f8068c2ada",
+    "nonce": "0x4eb12e19c16d43da",
+    "number": "2289805",
+    "stateRoot": "0xc7f10f352bff82fac3c2999d3085093d12652e19c7fd32591de49dc5d91b4f1f",
+    "timestamp": "1513601261",
+    "totalDifficulty": "7143276353481064"
+  },
+  "input": "0xf88b8271908506fc23ac0083015f90943b873a919aa0512d5a0f09e6dcceaa4a6727fafe80a463e4bff40000000000000000000000000024f658a46fbb89d8ac105e98d7ac7cbbaf27c52aa0bdce0b59e8761854e857fe64015f06dd08a4fbb7624f6094893a79a72e6ad6bea01d9dde033cff7bb235a3163f348a6d7ab8d6b52bc0963a95b91612e40ca766a4",
+  "result": {
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+      {
+        "from": "0x3b873a919aa0512d5a0f09e6dcceaa4a6727fafe",
+        "input": "0x",
+        "to": "0x0024f658a46fbb89d8ac105e98d7ac7cbbaf27c5",
+        "type": "CALL",
+        "value": "0x6f05b59d3b20000"
+      }
+    ],
+    "from": "0xb436ba50d378d4bbc8660d312a13df6af6e89dfb",
+    "gas": "0x10738",
+    "gasUsed": "0x3ef9",
+    "input": "0x63e4bff40000000000000000000000000024f658a46fbb89d8ac105e98d7ac7cbbaf27c5",
+    "output": "0x0000000000000000000000000000000000000000000000000000000000000001",
+    "to": "0x3b873a919aa0512d5a0f09e6dcceaa4a6727fafe",
+    "type": "CALL",
+    "value": "0x0"
+  }
+}
diff --git a/eth/tracers/testdata/call_tracer_throw.json b/eth/tracers/testdata/call_tracer_throw.json
new file mode 100644
index 0000000..d66f1ff
--- /dev/null
+++ b/eth/tracers/testdata/call_tracer_throw.json
@@ -0,0 +1,62 @@
+{
+  "context": {
+    "difficulty": "117009631",
+    "gasLimit": "4712388",
+    "miner": "0x294e5d6c39a36ce38af1dca70c1060f78dee8070",
+    "number": "25009",
+    "timestamp": "1479891666"
+  },
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+        "storage": {}
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+      "0xc212e03b9e060e36facad5fd8f4435412ca22e6b": {
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+      "daoForkSupport": true,
+      "eip150Block": 0,
+      "eip150Hash": "0x41941023680923e0fe4d74a34bdac8141f2540e3ae90623718e47d66d1ca4a2d",
+      "eip155Block": 10,
+      "eip158Block": 10,
+      "ethash": {},
+      "homesteadBlock": 0
+    },
+    "difficulty": "117066792",
+    "extraData": "0xd783010502846765746887676f312e372e33856c696e7578",
+    "gasLimit": "4712388",
+    "hash": "0xe23e8d4562a1045b70cbc99fefb20c101a8f0fc8559a80d65fea8896e2f1d46e",
+    "miner": "0x71842f946b98800fe6feb49f0ae4e253259031c9",
+    "mixHash": "0x0aada9d6e93dd4db0d09c0488dc0a048fca2ccdc1f3fc7b83ba2a8d393a3a4ff",
+    "nonce": "0x70849d5838dee2e9",
+    "number": "25008",
+    "stateRoot": "0x1e01d2161794768c5b917069e73d86e8dca80cd7f3168c0597de420ab93a3b7b",
+    "timestamp": "1479891641",
+    "totalDifficulty": "1896347038589"
+  },
+  "input": "0xf88b8206668504a817c8008303d09094c212e03b9e060e36facad5fd8f4435412ca22e6b80a451a34eb8000000000000000000000000000000000000000000000027fad02094277c000029a0692a3b4e7b2842f8dd7832e712c21e09f451f416c8976d5b8d02e8c0c2b4bea9a07645e90fc421b63dd755767fd93d3c03b4ec0c4d8fafa059558d08cf11d59750",
+  "result": {
+    "error": "evm: invalid jump destination",
+    "from": "0x70c9217d814985faef62b124420f8dfbddd96433",
+    "gas": "0x37b38",
+    "gasUsed": "0x37b38",
+    "input": "0x51a34eb8000000000000000000000000000000000000000000000027fad02094277c0000",
+    "to": "0xc212e03b9e060e36facad5fd8f4435412ca22e6b",
+    "type": "CALL",
+    "value": "0x0"
+  }
+}
diff --git a/eth/tracers/tracer.go b/eth/tracers/tracer.go
new file mode 100644
index 0000000..f2ef25d
--- /dev/null
+++ b/eth/tracers/tracer.go
@@ -0,0 +1,641 @@
+// Copyright 2017 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 tracers
+
+import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"math/big"
+	"sync/atomic"
+	"time"
+	"unsafe"
+
+	"github.com/ava-labs/coreth/core/vm"
+	"github.com/ava-labs/go-ethereum/common"
+	"github.com/ava-labs/go-ethereum/common/hexutil"
+	"github.com/ava-labs/go-ethereum/crypto"
+	"github.com/ava-labs/go-ethereum/log"
+	duktape "gopkg.in/olebedev/go-duktape.v3"
+)
+
+// bigIntegerJS is the minified version of https://github.com/peterolson/BigInteger.js.
+const bigIntegerJS = `var bigInt=function(undefined){"use strict";var BASE=1e7,LOG_BASE=7,MAX_INT=9007199254740992,MAX_INT_ARR=smallToArray(MAX_INT),LOG_MAX_INT=Math.log(MAX_INT);function Integer(v,radix){if(typeof v==="undefined")return Integer[0];if(typeof radix!=="undefined")return+radix===10?parseValue(v):parseBase(v,radix);return parseValue(v)}function BigInteger(value,sign){this.value=value;this.sign=sign;this.isSmall=false}BigInteger.prototype=Object.create(Integer.prototype);function SmallInteger(value){this.value=value;this.sign=value<0;this.isSmall=true}SmallInteger.prototype=Object.create(Integer.prototype);function isPrecise(n){return-MAX_INT<n&&n<MAX_INT}function smallToArray(n){if(n<1e7)return[n];if(n<1e14)return[n%1e7,Math.floor(n/1e7)];return[n%1e7,Math.floor(n/1e7)%1e7,Math.floor(n/1e14)]}function arrayToSmall(arr){trim(arr);var length=arr.length;if(length<4&&compareAbs(arr,MAX_INT_ARR)<0){switch(length){case 0:return 0;case 1:return arr[0];case 2:return arr[0]+arr[1]*BASE;default:return arr[0]+(arr[1]+arr[2]*BASE)*BASE}}return arr}function trim(v){var i=v.length;while(v[--i]===0);v.length=i+1}function createArray(length){var x=new Array(length);var i=-1;while(++i<length){x[i]=0}return x}function truncate(n){if(n>0)return Math.floor(n);return Math.ceil(n)}function add(a,b){var l_a=a.length,l_b=b.length,r=new Array(l_a),carry=0,base=BASE,sum,i;for(i=0;i<l_b;i++){sum=a[i]+b[i]+carry;carry=sum>=base?1:0;r[i]=sum-carry*base}while(i<l_a){sum=a[i]+carry;carry=sum===base?1:0;r[i++]=sum-carry*base}if(carry>0)r.push(carry);return r}function addAny(a,b){if(a.length>=b.length)return add(a,b);return add(b,a)}function addSmall(a,carry){var l=a.length,r=new Array(l),base=BASE,sum,i;for(i=0;i<l;i++){sum=a[i]-base+carry;carry=Math.floor(sum/base);r[i]=sum-carry*base;carry+=1}while(carry>0){r[i++]=carry%base;carry=Math.floor(carry/base)}return r}BigInteger.prototype.add=function(v){var n=parseValue(v);if(this.sign!==n.sign){return this.subtract(n.negate())}var a=this.value,b=n.value;if(n.isSmall){return new BigInteger(addSmall(a,Math.abs(b)),this.sign)}return new BigInteger(addAny(a,b),this.sign)};BigInteger.prototype.plus=BigInteger.prototype.add;SmallInteger.prototype.add=function(v){var n=parseValue(v);var a=this.value;if(a<0!==n.sign){return this.subtract(n.negate())}var b=n.value;if(n.isSmall){if(isPrecise(a+b))return new SmallInteger(a+b);b=smallToArray(Math.abs(b))}return new BigInteger(addSmall(b,Math.abs(a)),a<0)};SmallInteger.prototype.plus=SmallInteger.prototype.add;function subtract(a,b){var a_l=a.length,b_l=b.length,r=new Array(a_l),borrow=0,base=BASE,i,difference;for(i=0;i<b_l;i++){difference=a[i]-borrow-b[i];if(difference<0){difference+=base;borrow=1}else borrow=0;r[i]=difference}for(i=b_l;i<a_l;i++){difference=a[i]-borrow;if(difference<0)difference+=base;else{r[i++]=difference;break}r[i]=difference}for(;i<a_l;i++){r[i]=a[i]}trim(r);return r}function subtractAny(a,b,sign){var value;if(compareAbs(a,b)>=0){value=subtract(a,b)}else{value=subtract(b,a);sign=!sign}value=arrayToSmall(value);if(typeof value==="number"){if(sign)value=-value;return new SmallInteger(value)}return new BigInteger(value,sign)}function subtractSmall(a,b,sign){var l=a.length,r=new Array(l),carry=-b,base=BASE,i,difference;for(i=0;i<l;i++){difference=a[i]+carry;carry=Math.floor(difference/base);difference%=base;r[i]=difference<0?difference+base:difference}r=arrayToSmall(r);if(typeof r==="number"){if(sign)r=-r;return new SmallInteger(r)}return new BigInteger(r,sign)}BigInteger.prototype.subtract=function(v){var n=parseValue(v);if(this.sign!==n.sign){return this.add(n.negate())}var a=this.value,b=n.value;if(n.isSmall)return subtractSmall(a,Math.abs(b),this.sign);return subtractAny(a,b,this.sign)};BigInteger.prototype.minus=BigInteger.prototype.subtract;SmallInteger.prototype.subtract=function(v){var n=parseValue(v);var a=this.value;if(a<0!==n.sign){return this.add(n.negate())}var b=n.value;if(n.isSmall){return new SmallInteger(a-b)}return subtractSmall(b,Math.abs(a),a>=0)};SmallInteger.prototype.minus=SmallInteger.prototype.subtract;BigInteger.prototype.negate=function(){return new BigInteger(this.value,!this.sign)};SmallInteger.prototype.negate=function(){var sign=this.sign;var small=new SmallInteger(-this.value);small.sign=!sign;return small};BigInteger.prototype.abs=function(){return new BigInteger(this.value,false)};SmallInteger.prototype.abs=function(){return new SmallInteger(Math.abs(this.value))};function multiplyLong(a,b){var a_l=a.length,b_l=b.length,l=a_l+b_l,r=createArray(l),base=BASE,product,carry,i,a_i,b_j;for(i=0;i<a_l;++i){a_i=a[i];for(var j=0;j<b_l;++j){b_j=b[j];product=a_i*b_j+r[i+j];carry=Math.floor(product/base);r[i+j]=product-carry*base;r[i+j+1]+=carry}}trim(r);return r}function multiplySmall(a,b){var l=a.length,r=new Array(l),base=BASE,carry=0,product,i;for(i=0;i<l;i++){product=a[i]*b+carry;carry=Math.floor(product/base);r[i]=product-carry*base}while(carry>0){r[i++]=carry%base;carry=Math.floor(carry/base)}return r}function shiftLeft(x,n){var r=[];while(n-- >0)r.push(0);return r.concat(x)}function multiplyKaratsuba(x,y){var n=Math.max(x.length,y.length);if(n<=30)return multiplyLong(x,y);n=Math.ceil(n/2);var b=x.slice(n),a=x.slice(0,n),d=y.slice(n),c=y.slice(0,n);var ac=multiplyKaratsuba(a,c),bd=multiplyKaratsuba(b,d),abcd=multiplyKaratsuba(addAny(a,b),addAny(c,d));var product=addAny(addAny(ac,shiftLeft(subtract(subtract(abcd,ac),bd),n)),shiftLeft(bd,2*n));trim(product);return product}function useKaratsuba(l1,l2){return-.012*l1-.012*l2+15e-6*l1*l2>0}BigInteger.prototype.multiply=function(v){var n=parseValue(v),a=this.value,b=n.value,sign=this.sign!==n.sign,abs;if(n.isSmall){if(b===0)return Integer[0];if(b===1)return this;if(b===-1)return this.negate();abs=Math.abs(b);if(abs<BASE){return new BigInteger(multiplySmall(a,abs),sign)}b=smallToArray(abs)}if(useKaratsuba(a.length,b.length))return new BigInteger(multiplyKaratsuba(a,b),sign);return new BigInteger(multiplyLong(a,b),sign)};BigInteger.prototype.times=BigInteger.prototype.multiply;function multiplySmallAndArray(a,b,sign){if(a<BASE){return new BigInteger(multiplySmall(b,a),sign)}return new BigInteger(multiplyLong(b,smallToArray(a)),sign)}SmallInteger.prototype._multiplyBySmall=function(a){if(isPrecise(a.value*this.value)){return new SmallInteger(a.value*this.value)}return multiplySmallAndArray(Math.abs(a.value),smallToArray(Math.abs(this.value)),this.sign!==a.sign)};BigInteger.prototype._multiplyBySmall=function(a){if(a.value===0)return Integer[0];if(a.value===1)return this;if(a.value===-1)return this.negate();return multiplySmallAndArray(Math.abs(a.value),this.value,this.sign!==a.sign)};SmallInteger.prototype.multiply=function(v){return parseValue(v)._multiplyBySmall(this)};SmallInteger.prototype.times=SmallInteger.prototype.multiply;function square(a){var l=a.length,r=createArray(l+l),base=BASE,product,carry,i,a_i,a_j;for(i=0;i<l;i++){a_i=a[i];for(var j=0;j<l;j++){a_j=a[j];product=a_i*a_j+r[i+j];carry=Math.floor(product/base);r[i+j]=product-carry*base;r[i+j+1]+=carry}}trim(r);return r}BigInteger.prototype.square=function(){return new BigInteger(square(this.value),false)};SmallInteger.prototype.square=function(){var value=this.value*this.value;if(isPrecise(value))return new SmallInteger(value);return new BigInteger(square(smallToArray(Math.abs(this.value))),false)};function divMod1(a,b){var a_l=a.length,b_l=b.length,base=BASE,result=createArray(b.length),divisorMostSignificantDigit=b[b_l-1],lambda=Math.ceil(base/(2*divisorMostSignificantDigit)),remainder=multiplySmall(a,lambda),divisor=multiplySmall(b,lambda),quotientDigit,shift,carry,borrow,i,l,q;if(remainder.length<=a_l)remainder.push(0);divisor.push(0);divisorMostSignificantDigit=divisor[b_l-1];for(shift=a_l-b_l;shift>=0;shift--){quotientDigit=base-1;if(remainder[shift+b_l]!==divisorMostSignificantDigit){quotientDigit=Math.floor((remainder[shift+b_l]*base+remainder[shift+b_l-1])/divisorMostSignificantDigit)}carry=0;borrow=0;l=divisor.length;for(i=0;i<l;i++){carry+=quotientDigit*divisor[i];q=Math.floor(carry/base);borrow+=remainder[shift+i]-(carry-q*base);carry=q;if(borrow<0){remainder[shift+i]=borrow+base;borrow=-1}else{remainder[shift+i]=borrow;borrow=0}}while(borrow!==0){quotientDigit-=1;carry=0;for(i=0;i<l;i++){carry+=remainder[shift+i]-base+divisor[i];if(carry<0){remainder[shift+i]=carry+base;carry=0}else{remainder[shift+i]=carry;carry=1}}borrow+=carry}result[shift]=quotientDigit}remainder=divModSmall(remainder,lambda)[0];return[arrayToSmall(result),arrayToSmall(remainder)]}function divMod2(a,b){var a_l=a.length,b_l=b.length,result=[],part=[],base=BASE,guess,xlen,highx,highy,check;while(a_l){part.unshift(a[--a_l]);trim(part);if(compareAbs(part,b)<0){result.push(0);continue}xlen=part.length;highx=part[xlen-1]*base+part[xlen-2];highy=b[b_l-1]*base+b[b_l-2];if(xlen>b_l){highx=(highx+1)*base}guess=Math.ceil(highx/highy);do{check=multiplySmall(b,guess);if(compareAbs(check,part)<=0)break;guess--}while(guess);result.push(guess);part=subtract(part,check)}result.reverse();return[arrayToSmall(result),arrayToSmall(part)]}function divModSmall(value,lambda){var length=value.length,quotient=createArray(length),base=BASE,i,q,remainder,divisor;remainder=0;for(i=length-1;i>=0;--i){divisor=remainder*base+value[i];q=truncate(divisor/lambda);remainder=divisor-q*lambda;quotient[i]=q|0}return[quotient,remainder|0]}function divModAny(self,v){var value,n=parseValue(v);var a=self.value,b=n.value;var quotient;if(b===0)throw new Error("Cannot divide by zero");if(self.isSmall){if(n.isSmall){return[new SmallInteger(truncate(a/b)),new SmallInteger(a%b)]}return[Integer[0],self]}if(n.isSmall){if(b===1)return[self,Integer[0]];if(b==-1)return[self.negate(),Integer[0]];var abs=Math.abs(b);if(abs<BASE){value=divModSmall(a,abs);quotient=arrayToSmall(value[0]);var remainder=value[1];if(self.sign)remainder=-remainder;if(typeof quotient==="number"){if(self.sign!==n.sign)quotient=-quotient;return[new SmallInteger(quotient),new SmallInteger(remainder)]}return[new BigInteger(quotient,self.sign!==n.sign),new SmallInteger(remainder)]}b=smallToArray(abs)}var comparison=compareAbs(a,b);if(comparison===-1)return[Integer[0],self];if(comparison===0)return[Integer[self.sign===n.sign?1:-1],Integer[0]];if(a.length+b.length<=200)value=divMod1(a,b);else value=divMod2(a,b);quotient=value[0];var qSign=self.sign!==n.sign,mod=value[1],mSign=self.sign;if(typeof quotient==="number"){if(qSign)quotient=-quotient;quotient=new SmallInteger(quotient)}else quotient=new BigInteger(quotient,qSign);if(typeof mod==="number"){if(mSign)mod=-mod;mod=new SmallInteger(mod)}else mod=new BigInteger(mod,mSign);return[quotient,mod]}BigInteger.prototype.divmod=function(v){var result=divModAny(this,v);return{quotient:result[0],remainder:result[1]}};SmallInteger.prototype.divmod=BigInteger.prototype.divmod;BigInteger.prototype.divide=function(v){return divModAny(this,v)[0]};SmallInteger.prototype.over=SmallInteger.prototype.divide=BigInteger.prototype.over=BigInteger.prototype.divide;BigInteger.prototype.mod=function(v){return divModAny(this,v)[1]};SmallInteger.prototype.remainder=SmallInteger.prototype.mod=BigInteger.prototype.remainder=BigInteger.prototype.mod;BigInteger.prototype.pow=function(v){var n=parseValue(v),a=this.value,b=n.value,value,x,y;if(b===0)return Integer[1];if(a===0)return Integer[0];if(a===1)return Integer[1];if(a===-1)return n.isEven()?Integer[1]:Integer[-1];if(n.sign){return Integer[0]}if(!n.isSmall)throw new Error("The exponent "+n.toString()+" is too large.");if(this.isSmall){if(isPrecise(value=Math.pow(a,b)))return new SmallInteger(truncate(value))}x=this;y=Integer[1];while(true){if(b&1===1){y=y.times(x);--b}if(b===0)break;b/=2;x=x.square()}return y};SmallInteger.prototype.pow=BigInteger.prototype.pow;BigInteger.prototype.modPow=function(exp,mod){exp=parseValue(exp);mod=parseValue(mod);if(mod.isZero())throw new Error("Cannot take modPow with modulus 0");var r=Integer[1],base=this.mod(mod);while(exp.isPositive()){if(base.isZero())return Integer[0];if(exp.isOdd())r=r.multiply(base).mod(mod);exp=exp.divide(2);base=base.square().mod(mod)}return r};SmallInteger.prototype.modPow=BigInteger.prototype.modPow;function compareAbs(a,b){if(a.length!==b.length){return a.length>b.length?1:-1}for(var i=a.length-1;i>=0;i--){if(a[i]!==b[i])return a[i]>b[i]?1:-1}return 0}BigInteger.prototype.compareAbs=function(v){var n=parseValue(v),a=this.value,b=n.value;if(n.isSmall)return 1;return compareAbs(a,b)};SmallInteger.prototype.compareAbs=function(v){var n=parseValue(v),a=Math.abs(this.value),b=n.value;if(n.isSmall){b=Math.abs(b);return a===b?0:a>b?1:-1}return-1};BigInteger.prototype.compare=function(v){if(v===Infinity){return-1}if(v===-Infinity){return 1}var n=parseValue(v),a=this.value,b=n.value;if(this.sign!==n.sign){return n.sign?1:-1}if(n.isSmall){return this.sign?-1:1}return compareAbs(a,b)*(this.sign?-1:1)};BigInteger.prototype.compareTo=BigInteger.prototype.compare;SmallInteger.prototype.compare=function(v){if(v===Infinity){return-1}if(v===-Infinity){return 1}var n=parseValue(v),a=this.value,b=n.value;if(n.isSmall){return a==b?0:a>b?1:-1}if(a<0!==n.sign){return a<0?-1:1}return a<0?1:-1};SmallInteger.prototype.compareTo=SmallInteger.prototype.compare;BigInteger.prototype.equals=function(v){return this.compare(v)===0};SmallInteger.prototype.eq=SmallInteger.prototype.equals=BigInteger.prototype.eq=BigInteger.prototype.equals;BigInteger.prototype.notEquals=function(v){return this.compare(v)!==0};SmallInteger.prototype.neq=SmallInteger.prototype.notEquals=BigInteger.prototype.neq=BigInteger.prototype.notEquals;BigInteger.prototype.greater=function(v){return this.compare(v)>0};SmallInteger.prototype.gt=SmallInteger.prototype.greater=BigInteger.prototype.gt=BigInteger.prototype.greater;BigInteger.prototype.lesser=function(v){return this.compare(v)<0};SmallInteger.prototype.lt=SmallInteger.prototype.lesser=BigInteger.prototype.lt=BigInteger.prototype.lesser;BigInteger.prototype.greaterOrEquals=function(v){return this.compare(v)>=0};SmallInteger.prototype.geq=SmallInteger.prototype.greaterOrEquals=BigInteger.prototype.geq=BigInteger.prototype.greaterOrEquals;BigInteger.prototype.lesserOrEquals=function(v){return this.compare(v)<=0};SmallInteger.prototype.leq=SmallInteger.prototype.lesserOrEquals=BigInteger.prototype.leq=BigInteger.prototype.lesserOrEquals;BigInteger.prototype.isEven=function(){return(this.value[0]&1)===0};SmallInteger.prototype.isEven=function(){return(this.value&1)===0};BigInteger.prototype.isOdd=function(){return(this.value[0]&1)===1};SmallInteger.prototype.isOdd=function(){return(this.value&1)===1};BigInteger.prototype.isPositive=function(){return!this.sign};SmallInteger.prototype.isPositive=function(){return this.value>0};BigInteger.prototype.isNegative=function(){return this.sign};SmallInteger.prototype.isNegative=function(){return this.value<0};BigInteger.prototype.isUnit=function(){return false};SmallInteger.prototype.isUnit=function(){return Math.abs(this.value)===1};BigInteger.prototype.isZero=function(){return false};SmallInteger.prototype.isZero=function(){return this.value===0};BigInteger.prototype.isDivisibleBy=function(v){var n=parseValue(v);var value=n.value;if(value===0)return false;if(value===1)return true;if(value===2)return this.isEven();return this.mod(n).equals(Integer[0])};SmallInteger.prototype.isDivisibleBy=BigInteger.prototype.isDivisibleBy;function isBasicPrime(v){var n=v.abs();if(n.isUnit())return false;if(n.equals(2)||n.equals(3)||n.equals(5))return true;if(n.isEven()||n.isDivisibleBy(3)||n.isDivisibleBy(5))return false;if(n.lesser(25))return true}BigInteger.prototype.isPrime=function(){var isPrime=isBasicPrime(this);if(isPrime!==undefined)return isPrime;var n=this.abs(),nPrev=n.prev();var a=[2,3,5,7,11,13,17,19],b=nPrev,d,t,i,x;while(b.isEven())b=b.divide(2);for(i=0;i<a.length;i++){x=bigInt(a[i]).modPow(b,n);if(x.equals(Integer[1])||x.equals(nPrev))continue;for(t=true,d=b;t&&d.lesser(nPrev);d=d.multiply(2)){x=x.square().mod(n);if(x.equals(nPrev))t=false}if(t)return false}return true};SmallInteger.prototype.isPrime=BigInteger.prototype.isPrime;BigInteger.prototype.isProbablePrime=function(iterations){var isPrime=isBasicPrime(this);if(isPrime!==undefined)return isPrime;var n=this.abs();var t=iterations===undefined?5:iterations;for(var i=0;i<t;i++){var a=bigInt.randBetween(2,n.minus(2));if(!a.modPow(n.prev(),n).isUnit())return false}return true};SmallInteger.prototype.isProbablePrime=BigInteger.prototype.isProbablePrime;BigInteger.prototype.modInv=function(n){var t=bigInt.zero,newT=bigInt.one,r=parseValue(n),newR=this.abs(),q,lastT,lastR;while(!newR.equals(bigInt.zero)){q=r.divide(newR);lastT=t;lastR=r;t=newT;r=newR;newT=lastT.subtract(q.multiply(newT));newR=lastR.subtract(q.multiply(newR))}if(!r.equals(1))throw new Error(this.toString()+" and "+n.toString()+" are not co-prime");if(t.compare(0)===-1){t=t.add(n)}if(this.isNegative()){return t.negate()}return t};SmallInteger.prototype.modInv=BigInteger.prototype.modInv;BigInteger.prototype.next=function(){var value=this.value;if(this.sign){return subtractSmall(value,1,this.sign)}return new BigInteger(addSmall(value,1),this.sign)};SmallInteger.prototype.next=function(){var value=this.value;if(value+1<MAX_INT)return new SmallInteger(value+1);return new BigInteger(MAX_INT_ARR,false)};BigInteger.prototype.prev=function(){var value=this.value;if(this.sign){return new BigInteger(addSmall(value,1),true)}return subtractSmall(value,1,this.sign)};SmallInteger.prototype.prev=function(){var value=this.value;if(value-1>-MAX_INT)return new SmallInteger(value-1);return new BigInteger(MAX_INT_ARR,true)};var powersOfTwo=[1];while(2*powersOfTwo[powersOfTwo.length-1]<=BASE)powersOfTwo.push(2*powersOfTwo[powersOfTwo.length-1]);var powers2Length=powersOfTwo.length,highestPower2=powersOfTwo[powers2Length-1];function shift_isSmall(n){return(typeof n==="number"||typeof n==="string")&&+Math.abs(n)<=BASE||n instanceof BigInteger&&n.value.length<=1}BigInteger.prototype.shiftLeft=function(n){if(!shift_isSmall(n)){throw new Error(String(n)+" is too large for shifting.")}n=+n;if(n<0)return this.shiftRight(-n);var result=this;while(n>=powers2Length){result=result.multiply(highestPower2);n-=powers2Length-1}return result.multiply(powersOfTwo[n])};SmallInteger.prototype.shiftLeft=BigInteger.prototype.shiftLeft;BigInteger.prototype.shiftRight=function(n){var remQuo;if(!shift_isSmall(n)){throw new Error(String(n)+" is too large for shifting.")}n=+n;if(n<0)return this.shiftLeft(-n);var result=this;while(n>=powers2Length){if(result.isZero())return result;remQuo=divModAny(result,highestPower2);result=remQuo[1].isNegative()?remQuo[0].prev():remQuo[0];n-=powers2Length-1}remQuo=divModAny(result,powersOfTwo[n]);return remQuo[1].isNegative()?remQuo[0].prev():remQuo[0]};SmallInteger.prototype.shiftRight=BigInteger.prototype.shiftRight;function bitwise(x,y,fn){y=parseValue(y);var xSign=x.isNegative(),ySign=y.isNegative();var xRem=xSign?x.not():x,yRem=ySign?y.not():y;var xDigit=0,yDigit=0;var xDivMod=null,yDivMod=null;var result=[];while(!xRem.isZero()||!yRem.isZero()){xDivMod=divModAny(xRem,highestPower2);xDigit=xDivMod[1].toJSNumber();if(xSign){xDigit=highestPower2-1-xDigit}yDivMod=divModAny(yRem,highestPower2);yDigit=yDivMod[1].toJSNumber();if(ySign){yDigit=highestPower2-1-yDigit}xRem=xDivMod[0];yRem=yDivMod[0];result.push(fn(xDigit,yDigit))}var sum=fn(xSign?1:0,ySign?1:0)!==0?bigInt(-1):bigInt(0);for(var i=result.length-1;i>=0;i-=1){sum=sum.multiply(highestPower2).add(bigInt(result[i]))}return sum}BigInteger.prototype.not=function(){return this.negate().prev()};SmallInteger.prototype.not=BigInteger.prototype.not;BigInteger.prototype.and=function(n){return bitwise(this,n,function(a,b){return a&b})};SmallInteger.prototype.and=BigInteger.prototype.and;BigInteger.prototype.or=function(n){return bitwise(this,n,function(a,b){return a|b})};SmallInteger.prototype.or=BigInteger.prototype.or;BigInteger.prototype.xor=function(n){return bitwise(this,n,function(a,b){return a^b})};SmallInteger.prototype.xor=BigInteger.prototype.xor;var LOBMASK_I=1<<30,LOBMASK_BI=(BASE&-BASE)*(BASE&-BASE)|LOBMASK_I;function roughLOB(n){var v=n.value,x=typeof v==="number"?v|LOBMASK_I:v[0]+v[1]*BASE|LOBMASK_BI;return x&-x}function max(a,b){a=parseValue(a);b=parseValue(b);return a.greater(b)?a:b}function min(a,b){a=parseValue(a);b=parseValue(b);return a.lesser(b)?a:b}function gcd(a,b){a=parseValue(a).abs();b=parseValue(b).abs();if(a.equals(b))return a;if(a.isZero())return b;if(b.isZero())return a;var c=Integer[1],d,t;while(a.isEven()&&b.isEven()){d=Math.min(roughLOB(a),roughLOB(b));a=a.divide(d);b=b.divide(d);c=c.multiply(d)}while(a.isEven()){a=a.divide(roughLOB(a))}do{while(b.isEven()){b=b.divide(roughLOB(b))}if(a.greater(b)){t=b;b=a;a=t}b=b.subtract(a)}while(!b.isZero());return c.isUnit()?a:a.multiply(c)}function lcm(a,b){a=parseValue(a).abs();b=parseValue(b).abs();return a.divide(gcd(a,b)).multiply(b)}function randBetween(a,b){a=parseValue(a);b=parseValue(b);var low=min(a,b),high=max(a,b);var range=high.subtract(low).add(1);if(range.isSmall)return low.add(Math.floor(Math.random()*range));var length=range.value.length-1;var result=[],restricted=true;for(var i=length;i>=0;i--){var top=restricted?range.value[i]:BASE;var digit=truncate(Math.random()*top);result.unshift(digit);if(digit<top)restricted=false}result=arrayToSmall(result);return low.add(typeof result==="number"?new SmallInteger(result):new BigInteger(result,false))}var parseBase=function(text,base){var length=text.length;var i;var absBase=Math.abs(base);for(var i=0;i<length;i++){var c=text[i].toLowerCase();if(c==="-")continue;if(/[a-z0-9]/.test(c)){if(/[0-9]/.test(c)&&+c>=absBase){if(c==="1"&&absBase===1)continue;throw new Error(c+" is not a valid digit in base "+base+".")}else if(c.charCodeAt(0)-87>=absBase){throw new Error(c+" is not a valid digit in base "+base+".")}}}if(2<=base&&base<=36){if(length<=LOG_MAX_INT/Math.log(base)){var result=parseInt(text,base);if(isNaN(result)){throw new Error(c+" is not a valid digit in base "+base+".")}return new SmallInteger(parseInt(text,base))}}base=parseValue(base);var digits=[];var isNegative=text[0]==="-";for(i=isNegative?1:0;i<text.length;i++){var c=text[i].toLowerCase(),charCode=c.charCodeAt(0);if(48<=charCode&&charCode<=57)digits.push(parseValue(c));else if(97<=charCode&&charCode<=122)digits.push(parseValue(c.charCodeAt(0)-87));else if(c==="<"){var start=i;do{i++}while(text[i]!==">");digits.push(parseValue(text.slice(start+1,i)))}else throw new Error(c+" is not a valid character")}return parseBaseFromArray(digits,base,isNegative)};function parseBaseFromArray(digits,base,isNegative){var val=Integer[0],pow=Integer[1],i;for(i=digits.length-1;i>=0;i--){val=val.add(digits[i].times(pow));pow=pow.times(base)}return isNegative?val.negate():val}function stringify(digit){var v=digit.value;if(typeof v==="number")v=[v];if(v.length===1&&v[0]<=35){return"0123456789abcdefghijklmnopqrstuvwxyz".charAt(v[0])}return"<"+v+">"}function toBase(n,base){base=bigInt(base);if(base.isZero()){if(n.isZero())return"0";throw new Error("Cannot convert nonzero numbers to base 0.")}if(base.equals(-1)){if(n.isZero())return"0";if(n.isNegative())return new Array(1-n).join("10");return"1"+new Array(+n).join("01")}var minusSign="";if(n.isNegative()&&base.isPositive()){minusSign="-";n=n.abs()}if(base.equals(1)){if(n.isZero())return"0";return minusSign+new Array(+n+1).join(1)}var out=[];var left=n,divmod;while(left.isNegative()||left.compareAbs(base)>=0){divmod=left.divmod(base);left=divmod.quotient;var digit=divmod.remainder;if(digit.isNegative()){digit=base.minus(digit).abs();left=left.next()}out.push(stringify(digit))}out.push(stringify(left));return minusSign+out.reverse().join("")}BigInteger.prototype.toString=function(radix){if(radix===undefined)radix=10;if(radix!==10)return toBase(this,radix);var v=this.value,l=v.length,str=String(v[--l]),zeros="0000000",digit;while(--l>=0){digit=String(v[l]);str+=zeros.slice(digit.length)+digit}var sign=this.sign?"-":"";return sign+str};SmallInteger.prototype.toString=function(radix){if(radix===undefined)radix=10;if(radix!=10)return toBase(this,radix);return String(this.value)};BigInteger.prototype.toJSON=SmallInteger.prototype.toJSON=function(){return this.toString()};BigInteger.prototype.valueOf=function(){return+this.toString()};BigInteger.prototype.toJSNumber=BigInteger.prototype.valueOf;SmallInteger.prototype.valueOf=function(){return this.value};SmallInteger.prototype.toJSNumber=SmallInteger.prototype.valueOf;function parseStringValue(v){if(isPrecise(+v)){var x=+v;if(x===truncate(x))return new SmallInteger(x);throw"Invalid integer: "+v}var sign=v[0]==="-";if(sign)v=v.slice(1);var split=v.split(/e/i);if(split.length>2)throw new Error("Invalid integer: "+split.join("e"));if(split.length===2){var exp=split[1];if(exp[0]==="+")exp=exp.slice(1);exp=+exp;if(exp!==truncate(exp)||!isPrecise(exp))throw new Error("Invalid integer: "+exp+" is not a valid exponent.");var text=split[0];var decimalPlace=text.indexOf(".");if(decimalPlace>=0){exp-=text.length-decimalPlace-1;text=text.slice(0,decimalPlace)+text.slice(decimalPlace+1)}if(exp<0)throw new Error("Cannot include negative exponent part for integers");text+=new Array(exp+1).join("0");v=text}var isValid=/^([0-9][0-9]*)$/.test(v);if(!isValid)throw new Error("Invalid integer: "+v);var r=[],max=v.length,l=LOG_BASE,min=max-l;while(max>0){r.push(+v.slice(min,max));min-=l;if(min<0)min=0;max-=l}trim(r);return new BigInteger(r,sign)}function parseNumberValue(v){if(isPrecise(v)){if(v!==truncate(v))throw new Error(v+" is not an integer.");return new SmallInteger(v)}return parseStringValue(v.toString())}function parseValue(v){if(typeof v==="number"){return parseNumberValue(v)}if(typeof v==="string"){return parseStringValue(v)}return v}for(var i=0;i<1e3;i++){Integer[i]=new SmallInteger(i);if(i>0)Integer[-i]=new SmallInteger(-i)}Integer.one=Integer[1];Integer.zero=Integer[0];Integer.minusOne=Integer[-1];Integer.max=max;Integer.min=min;Integer.gcd=gcd;Integer.lcm=lcm;Integer.isInstance=function(x){return x instanceof BigInteger||x instanceof SmallInteger};Integer.randBetween=randBetween;Integer.fromArray=function(digits,base,isNegative){return parseBaseFromArray(digits.map(parseValue),parseValue(base||10),isNegative)};return Integer}();if(typeof module!=="undefined"&&module.hasOwnProperty("exports")){module.exports=bigInt}if(typeof define==="function"&&define.amd){define("big-integer",[],function(){return bigInt})}; bigInt`
+
+// makeSlice convert an unsafe memory pointer with the given type into a Go byte
+// slice.
+//
+// Note, the returned slice uses the same memory area as the input arguments.
+// If those are duktape stack items, popping them off **will** make the slice
+// contents change.
+func makeSlice(ptr unsafe.Pointer, size uint) []byte {
+	var sl = struct {
+		addr uintptr
+		len  int
+		cap  int
+	}{uintptr(ptr), int(size), int(size)}
+
+	return *(*[]byte)(unsafe.Pointer(&sl))
+}
+
+// popSlice pops a buffer off the JavaScript stack and returns it as a slice.
+func popSlice(ctx *duktape.Context) []byte {
+	blob := common.CopyBytes(makeSlice(ctx.GetBuffer(-1)))
+	ctx.Pop()
+	return blob
+}
+
+// pushBigInt create a JavaScript BigInteger in the VM.
+func pushBigInt(n *big.Int, ctx *duktape.Context) {
+	ctx.GetGlobalString("bigInt")
+	ctx.PushString(n.String())
+	ctx.Call(1)
+}
+
+// opWrapper provides a JavaScript wrapper around OpCode.
+type opWrapper struct {
+	op vm.OpCode
+}
+
+// pushObject assembles a JSVM object wrapping a swappable opcode and pushes it
+// onto the VM stack.
+func (ow *opWrapper) pushObject(vm *duktape.Context) {
+	obj := vm.PushObject()
+
+	vm.PushGoFunction(func(ctx *duktape.Context) int { ctx.PushInt(int(ow.op)); return 1 })
+	vm.PutPropString(obj, "toNumber")
+
+	vm.PushGoFunction(func(ctx *duktape.Context) int { ctx.PushString(ow.op.String()); return 1 })
+	vm.PutPropString(obj, "toString")
+
+	vm.PushGoFunction(func(ctx *duktape.Context) int { ctx.PushBoolean(ow.op.IsPush()); return 1 })
+	vm.PutPropString(obj, "isPush")
+}
+
+// memoryWrapper provides a JavaScript wrapper around vm.Memory.
+type memoryWrapper struct {
+	memory *vm.Memory
+}
+
+// slice returns the requested range of memory as a byte slice.
+func (mw *memoryWrapper) slice(begin, end int64) []byte {
+	if mw.memory.Len() < int(end) {
+		// TODO(karalabe): We can't js-throw from Go inside duktape inside Go. The Go
+		// runtime goes belly up https://github.com/golang/go/issues/15639.
+		log.Warn("Tracer accessed out of bound memory", "available", mw.memory.Len(), "offset", begin, "size", end-begin)
+		return nil
+	}
+	return mw.memory.Get(begin, end-begin)
+}
+
+// getUint returns the 32 bytes at the specified address interpreted as a uint.
+func (mw *memoryWrapper) getUint(addr int64) *big.Int {
+	if mw.memory.Len() < int(addr)+32 {
+		// TODO(karalabe): We can't js-throw from Go inside duktape inside Go. The Go
+		// runtime goes belly up https://github.com/golang/go/issues/15639.
+		log.Warn("Tracer accessed out of bound memory", "available", mw.memory.Len(), "offset", addr, "size", 32)
+		return new(big.Int)
+	}
+	return new(big.Int).SetBytes(mw.memory.GetPtr(addr, 32))
+}
+
+// pushObject assembles a JSVM object wrapping a swappable memory and pushes it
+// onto the VM stack.
+func (mw *memoryWrapper) pushObject(vm *duktape.Context) {
+	obj := vm.PushObject()
+
+	// Generate the `slice` method which takes two ints and returns a buffer
+	vm.PushGoFunction(func(ctx *duktape.Context) int {
+		blob := mw.slice(int64(ctx.GetInt(-2)), int64(ctx.GetInt(-1)))
+		ctx.Pop2()
+
+		ptr := ctx.PushFixedBuffer(len(blob))
+		copy(makeSlice(ptr, uint(len(blob))), blob)
+		return 1
+	})
+	vm.PutPropString(obj, "slice")
+
+	// Generate the `getUint` method which takes an int and returns a bigint
+	vm.PushGoFunction(func(ctx *duktape.Context) int {
+		offset := int64(ctx.GetInt(-1))
+		ctx.Pop()
+
+		pushBigInt(mw.getUint(offset), ctx)
+		return 1
+	})
+	vm.PutPropString(obj, "getUint")
+}
+
+// stackWrapper provides a JavaScript wrapper around vm.Stack.
+type stackWrapper struct {
+	stack *vm.Stack
+}
+
+// peek returns the nth-from-the-top element of the stack.
+func (sw *stackWrapper) peek(idx int) *big.Int {
+	if len(sw.stack.Data()) <= idx {
+		// TODO(karalabe): We can't js-throw from Go inside duktape inside Go. The Go
+		// runtime goes belly up https://github.com/golang/go/issues/15639.
+		log.Warn("Tracer accessed out of bound stack", "size", len(sw.stack.Data()), "index", idx)
+		return new(big.Int)
+	}
+	return sw.stack.Data()[len(sw.stack.Data())-idx-1]
+}
+
+// pushObject assembles a JSVM object wrapping a swappable stack and pushes it
+// onto the VM stack.
+func (sw *stackWrapper) pushObject(vm *duktape.Context) {
+	obj := vm.PushObject()
+
+	vm.PushGoFunction(func(ctx *duktape.Context) int { ctx.PushInt(len(sw.stack.Data())); return 1 })
+	vm.PutPropString(obj, "length")
+
+	// Generate the `peek` method which takes an int and returns a bigint
+	vm.PushGoFunction(func(ctx *duktape.Context) int {
+		offset := ctx.GetInt(-1)
+		ctx.Pop()
+
+		pushBigInt(sw.peek(offset), ctx)
+		return 1
+	})
+	vm.PutPropString(obj, "peek")
+}
+
+// dbWrapper provides a JavaScript wrapper around vm.Database.
+type dbWrapper struct {
+	db vm.StateDB
+}
+
+// pushObject assembles a JSVM object wrapping a swappable database and pushes it
+// onto the VM stack.
+func (dw *dbWrapper) pushObject(vm *duktape.Context) {
+	obj := vm.PushObject()
+
+	// Push the wrapper for statedb.GetBalance
+	vm.PushGoFunction(func(ctx *duktape.Context) int {
+		pushBigInt(dw.db.GetBalance(common.BytesToAddress(popSlice(ctx))), ctx)
+		return 1
+	})
+	vm.PutPropString(obj, "getBalance")
+
+	// Push the wrapper for statedb.GetNonce
+	vm.PushGoFunction(func(ctx *duktape.Context) int {
+		ctx.PushInt(int(dw.db.GetNonce(common.BytesToAddress(popSlice(ctx)))))
+		return 1
+	})
+	vm.PutPropString(obj, "getNonce")
+
+	// Push the wrapper for statedb.GetCode
+	vm.PushGoFunction(func(ctx *duktape.Context) int {
+		code := dw.db.GetCode(common.BytesToAddress(popSlice(ctx)))
+
+		ptr := ctx.PushFixedBuffer(len(code))
+		copy(makeSlice(ptr, uint(len(code))), code)
+		return 1
+	})
+	vm.PutPropString(obj, "getCode")
+
+	// Push the wrapper for statedb.GetState
+	vm.PushGoFunction(func(ctx *duktape.Context) int {
+		hash := popSlice(ctx)
+		addr := popSlice(ctx)
+
+		state := dw.db.GetState(common.BytesToAddress(addr), common.BytesToHash(hash))
+
+		ptr := ctx.PushFixedBuffer(len(state))
+		copy(makeSlice(ptr, uint(len(state))), state[:])
+		return 1
+	})
+	vm.PutPropString(obj, "getState")
+
+	// Push the wrapper for statedb.Exists
+	vm.PushGoFunction(func(ctx *duktape.Context) int {
+		ctx.PushBoolean(dw.db.Exist(common.BytesToAddress(popSlice(ctx))))
+		return 1
+	})
+	vm.PutPropString(obj, "exists")
+}
+
+// contractWrapper provides a JavaScript wrapper around vm.Contract
+type contractWrapper struct {
+	contract *vm.Contract
+}
+
+// pushObject assembles a JSVM object wrapping a swappable contract and pushes it
+// onto the VM stack.
+func (cw *contractWrapper) pushObject(vm *duktape.Context) {
+	obj := vm.PushObject()
+
+	// Push the wrapper for contract.Caller
+	vm.PushGoFunction(func(ctx *duktape.Context) int {
+		ptr := ctx.PushFixedBuffer(20)
+		copy(makeSlice(ptr, 20), cw.contract.Caller().Bytes())
+		return 1
+	})
+	vm.PutPropString(obj, "getCaller")
+
+	// Push the wrapper for contract.Address
+	vm.PushGoFunction(func(ctx *duktape.Context) int {
+		ptr := ctx.PushFixedBuffer(20)
+		copy(makeSlice(ptr, 20), cw.contract.Address().Bytes())
+		return 1
+	})
+	vm.PutPropString(obj, "getAddress")
+
+	// Push the wrapper for contract.Value
+	vm.PushGoFunction(func(ctx *duktape.Context) int {
+		pushBigInt(cw.contract.Value(), ctx)
+		return 1
+	})
+	vm.PutPropString(obj, "getValue")
+
+	// Push the wrapper for contract.Input
+	vm.PushGoFunction(func(ctx *duktape.Context) int {
+		blob := cw.contract.Input
+
+		ptr := ctx.PushFixedBuffer(len(blob))
+		copy(makeSlice(ptr, uint(len(blob))), blob)
+		return 1
+	})
+	vm.PutPropString(obj, "getInput")
+}
+
+// Tracer provides an implementation of Tracer that evaluates a Javascript
+// function for each VM execution step.
+type Tracer struct {
+	inited bool // Flag whether the context was already inited from the EVM
+
+	vm *duktape.Context // Javascript VM instance
+
+	tracerObject int // Stack index of the tracer JavaScript object
+	stateObject  int // Stack index of the global state to pull arguments from
+
+	opWrapper       *opWrapper       // Wrapper around the VM opcode
+	stackWrapper    *stackWrapper    // Wrapper around the VM stack
+	memoryWrapper   *memoryWrapper   // Wrapper around the VM memory
+	contractWrapper *contractWrapper // Wrapper around the contract object
+	dbWrapper       *dbWrapper       // Wrapper around the VM environment
+
+	pcValue     *uint   // Swappable pc value wrapped by a log accessor
+	gasValue    *uint   // Swappable gas value wrapped by a log accessor
+	costValue   *uint   // Swappable cost value wrapped by a log accessor
+	depthValue  *uint   // Swappable depth value wrapped by a log accessor
+	errorValue  *string // Swappable error value wrapped by a log accessor
+	refundValue *uint   // Swappable refund value wrapped by a log accessor
+
+	ctx map[string]interface{} // Transaction context gathered throughout execution
+	err error                  // Error, if one has occurred
+
+	interrupt uint32 // Atomic flag to signal execution interruption
+	reason    error  // Textual reason for the interruption
+}
+
+// New instantiates a new tracer instance. code specifies a Javascript snippet,
+// which must evaluate to an expression returning an object with 'step', 'fault'
+// and 'result' functions.
+func New(code string) (*Tracer, error) {
+	// Resolve any tracers by name and assemble the tracer object
+	if tracer, ok := tracer(code); ok {
+		code = tracer
+	}
+	tracer := &Tracer{
+		vm:              duktape.New(),
+		ctx:             make(map[string]interface{}),
+		opWrapper:       new(opWrapper),
+		stackWrapper:    new(stackWrapper),
+		memoryWrapper:   new(memoryWrapper),
+		contractWrapper: new(contractWrapper),
+		dbWrapper:       new(dbWrapper),
+		pcValue:         new(uint),
+		gasValue:        new(uint),
+		costValue:       new(uint),
+		depthValue:      new(uint),
+		refundValue:     new(uint),
+	}
+	// Set up builtins for this environment
+	tracer.vm.PushGlobalGoFunction("toHex", func(ctx *duktape.Context) int {
+		ctx.PushString(hexutil.Encode(popSlice(ctx)))
+		return 1
+	})
+	tracer.vm.PushGlobalGoFunction("toWord", func(ctx *duktape.Context) int {
+		var word common.Hash
+		if ptr, size := ctx.GetBuffer(-1); ptr != nil {
+			word = common.BytesToHash(makeSlice(ptr, size))
+		} else {
+			word = common.HexToHash(ctx.GetString(-1))
+		}
+		ctx.Pop()
+		copy(makeSlice(ctx.PushFixedBuffer(32), 32), word[:])
+		return 1
+	})
+	tracer.vm.PushGlobalGoFunction("toAddress", func(ctx *duktape.Context) int {
+		var addr common.Address
+		if ptr, size := ctx.GetBuffer(-1); ptr != nil {
+			addr = common.BytesToAddress(makeSlice(ptr, size))
+		} else {
+			addr = common.HexToAddress(ctx.GetString(-1))
+		}
+		ctx.Pop()
+		copy(makeSlice(ctx.PushFixedBuffer(20), 20), addr[:])
+		return 1
+	})
+	tracer.vm.PushGlobalGoFunction("toContract", func(ctx *duktape.Context) int {
+		var from common.Address
+		if ptr, size := ctx.GetBuffer(-2); ptr != nil {
+			from = common.BytesToAddress(makeSlice(ptr, size))
+		} else {
+			from = common.HexToAddress(ctx.GetString(-2))
+		}
+		nonce := uint64(ctx.GetInt(-1))
+		ctx.Pop2()
+
+		contract := crypto.CreateAddress(from, nonce)
+		copy(makeSlice(ctx.PushFixedBuffer(20), 20), contract[:])
+		return 1
+	})
+	tracer.vm.PushGlobalGoFunction("toContract2", func(ctx *duktape.Context) int {
+		var from common.Address
+		if ptr, size := ctx.GetBuffer(-3); ptr != nil {
+			from = common.BytesToAddress(makeSlice(ptr, size))
+		} else {
+			from = common.HexToAddress(ctx.GetString(-3))
+		}
+		// Retrieve salt hex string from js stack
+		salt := common.HexToHash(ctx.GetString(-2))
+		// Retrieve code slice from js stack
+		var code []byte
+		if ptr, size := ctx.GetBuffer(-1); ptr != nil {
+			code = common.CopyBytes(makeSlice(ptr, size))
+		} else {
+			code = common.FromHex(ctx.GetString(-1))
+		}
+		codeHash := crypto.Keccak256(code)
+		ctx.Pop3()
+		contract := crypto.CreateAddress2(from, salt, codeHash)
+		copy(makeSlice(ctx.PushFixedBuffer(20), 20), contract[:])
+		return 1
+	})
+	tracer.vm.PushGlobalGoFunction("isPrecompiled", func(ctx *duktape.Context) int {
+		_, ok := vm.PrecompiledContractsIstanbul[common.BytesToAddress(popSlice(ctx))]
+		ctx.PushBoolean(ok)
+		return 1
+	})
+	tracer.vm.PushGlobalGoFunction("slice", func(ctx *duktape.Context) int {
+		start, end := ctx.GetInt(-2), ctx.GetInt(-1)
+		ctx.Pop2()
+
+		blob := popSlice(ctx)
+		size := end - start
+
+		if start < 0 || start > end || end > len(blob) {
+			// TODO(karalabe): We can't js-throw from Go inside duktape inside Go. The Go
+			// runtime goes belly up https://github.com/golang/go/issues/15639.
+			log.Warn("Tracer accessed out of bound memory", "available", len(blob), "offset", start, "size", size)
+			ctx.PushFixedBuffer(0)
+			return 1
+		}
+		copy(makeSlice(ctx.PushFixedBuffer(size), uint(size)), blob[start:end])
+		return 1
+	})
+	// Push the JavaScript tracer as object #0 onto the JSVM stack and validate it
+	if err := tracer.vm.PevalString("(" + code + ")"); err != nil {
+		log.Warn("Failed to compile tracer", "err", err)
+		return nil, err
+	}
+	tracer.tracerObject = 0 // yeah, nice, eval can't return the index itself
+
+	if !tracer.vm.GetPropString(tracer.tracerObject, "step") {
+		return nil, fmt.Errorf("Trace object must expose a function step()")
+	}
+	tracer.vm.Pop()
+
+	if !tracer.vm.GetPropString(tracer.tracerObject, "fault") {
+		return nil, fmt.Errorf("Trace object must expose a function fault()")
+	}
+	tracer.vm.Pop()
+
+	if !tracer.vm.GetPropString(tracer.tracerObject, "result") {
+		return nil, fmt.Errorf("Trace object must expose a function result()")
+	}
+	tracer.vm.Pop()
+
+	// Tracer is valid, inject the big int library to access large numbers
+	tracer.vm.EvalString(bigIntegerJS)
+	tracer.vm.PutGlobalString("bigInt")
+
+	// Push the global environment state as object #1 into the JSVM stack
+	tracer.stateObject = tracer.vm.PushObject()
+
+	logObject := tracer.vm.PushObject()
+
+	tracer.opWrapper.pushObject(tracer.vm)
+	tracer.vm.PutPropString(logObject, "op")
+
+	tracer.stackWrapper.pushObject(tracer.vm)
+	tracer.vm.PutPropString(logObject, "stack")
+
+	tracer.memoryWrapper.pushObject(tracer.vm)
+	tracer.vm.PutPropString(logObject, "memory")
+
+	tracer.contractWrapper.pushObject(tracer.vm)
+	tracer.vm.PutPropString(logObject, "contract")
+
+	tracer.vm.PushGoFunction(func(ctx *duktape.Context) int { ctx.PushUint(*tracer.pcValue); return 1 })
+	tracer.vm.PutPropString(logObject, "getPC")
+
+	tracer.vm.PushGoFunction(func(ctx *duktape.Context) int { ctx.PushUint(*tracer.gasValue); return 1 })
+	tracer.vm.PutPropString(logObject, "getGas")
+
+	tracer.vm.PushGoFunction(func(ctx *duktape.Context) int { ctx.PushUint(*tracer.costValue); return 1 })
+	tracer.vm.PutPropString(logObject, "getCost")
+
+	tracer.vm.PushGoFunction(func(ctx *duktape.Context) int { ctx.PushUint(*tracer.depthValue); return 1 })
+	tracer.vm.PutPropString(logObject, "getDepth")
+
+	tracer.vm.PushGoFunction(func(ctx *duktape.Context) int { ctx.PushUint(*tracer.refundValue); return 1 })
+	tracer.vm.PutPropString(logObject, "getRefund")
+
+	tracer.vm.PushGoFunction(func(ctx *duktape.Context) int {
+		if tracer.errorValue != nil {
+			ctx.PushString(*tracer.errorValue)
+		} else {
+			ctx.PushUndefined()
+		}
+		return 1
+	})
+	tracer.vm.PutPropString(logObject, "getError")
+
+	tracer.vm.PutPropString(tracer.stateObject, "log")
+
+	tracer.dbWrapper.pushObject(tracer.vm)
+	tracer.vm.PutPropString(tracer.stateObject, "db")
+
+	return tracer, nil
+}
+
+// Stop terminates execution of the tracer at the first opportune moment.
+func (jst *Tracer) Stop(err error) {
+	jst.reason = err
+	atomic.StoreUint32(&jst.interrupt, 1)
+}
+
+// call executes a method on a JS object, catching any errors, formatting and
+// returning them as error objects.
+func (jst *Tracer) call(method string, args ...string) (json.RawMessage, error) {
+	// Execute the JavaScript call and return any error
+	jst.vm.PushString(method)
+	for _, arg := range args {
+		jst.vm.GetPropString(jst.stateObject, arg)
+	}
+	code := jst.vm.PcallProp(jst.tracerObject, len(args))
+	defer jst.vm.Pop()
+
+	if code != 0 {
+		err := jst.vm.SafeToString(-1)
+		return nil, errors.New(err)
+	}
+	// No error occurred, extract return value and return
+	return json.RawMessage(jst.vm.JsonEncode(-1)), nil
+}
+
+func wrapError(context string, err error) error {
+	return fmt.Errorf("%v    in server-side tracer function '%v'", err, context)
+}
+
+// CaptureStart implements the Tracer interface to initialize the tracing operation.
+func (jst *Tracer) CaptureStart(from common.Address, to common.Address, create bool, input []byte, gas uint64, value *big.Int) error {
+	jst.ctx["type"] = "CALL"
+	if create {
+		jst.ctx["type"] = "CREATE"
+	}
+	jst.ctx["from"] = from
+	jst.ctx["to"] = to
+	jst.ctx["input"] = input
+	jst.ctx["gas"] = gas
+	jst.ctx["value"] = value
+
+	return nil
+}
+
+// CaptureState implements the Tracer interface to trace a single step of VM execution.
+func (jst *Tracer) CaptureState(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, memory *vm.Memory, stack *vm.Stack, contract *vm.Contract, depth int, err error) error {
+	if jst.err == nil {
+		// Initialize the context if it wasn't done yet
+		if !jst.inited {
+			jst.ctx["block"] = env.BlockNumber.Uint64()
+			jst.inited = true
+		}
+		// If tracing was interrupted, set the error and stop
+		if atomic.LoadUint32(&jst.interrupt) > 0 {
+			jst.err = jst.reason
+			return nil
+		}
+		jst.opWrapper.op = op
+		jst.stackWrapper.stack = stack
+		jst.memoryWrapper.memory = memory
+		jst.contractWrapper.contract = contract
+		jst.dbWrapper.db = env.StateDB
+
+		*jst.pcValue = uint(pc)
+		*jst.gasValue = uint(gas)
+		*jst.costValue = uint(cost)
+		*jst.depthValue = uint(depth)
+		*jst.refundValue = uint(env.StateDB.GetRefund())
+
+		jst.errorValue = nil
+		if err != nil {
+			jst.errorValue = new(string)
+			*jst.errorValue = err.Error()
+		}
+		_, err := jst.call("step", "log", "db")
+		if err != nil {
+			jst.err = wrapError("step", err)
+		}
+	}
+	return nil
+}
+
+// CaptureFault implements the Tracer interface to trace an execution fault
+// while running an opcode.
+func (jst *Tracer) CaptureFault(env *vm.EVM, pc uint64, op vm.OpCode, gas, cost uint64, memory *vm.Memory, stack *vm.Stack, contract *vm.Contract, depth int, err error) error {
+	if jst.err == nil {
+		// Apart from the error, everything matches the previous invocation
+		jst.errorValue = new(string)
+		*jst.errorValue = err.Error()
+
+		_, err := jst.call("fault", "log", "db")
+		if err != nil {
+			jst.err = wrapError("fault", err)
+		}
+	}
+	return nil
+}
+
+// CaptureEnd is called after the call finishes to finalize the tracing.
+func (jst *Tracer) CaptureEnd(output []byte, gasUsed uint64, t time.Duration, err error) error {
+	jst.ctx["output"] = output
+	jst.ctx["gasUsed"] = gasUsed
+	jst.ctx["time"] = t.String()
+
+	if err != nil {
+		jst.ctx["error"] = err.Error()
+	}
+	return nil
+}
+
+// GetResult calls the Javascript 'result' function and returns its value, or any accumulated error
+func (jst *Tracer) GetResult() (json.RawMessage, error) {
+	// Transform the context into a JavaScript object and inject into the state
+	obj := jst.vm.PushObject()
+
+	for key, val := range jst.ctx {
+		switch val := val.(type) {
+		case uint64:
+			jst.vm.PushUint(uint(val))
+
+		case string:
+			jst.vm.PushString(val)
+
+		case []byte:
+			ptr := jst.vm.PushFixedBuffer(len(val))
+			copy(makeSlice(ptr, uint(len(val))), val)
+
+		case common.Address:
+			ptr := jst.vm.PushFixedBuffer(20)
+			copy(makeSlice(ptr, 20), val[:])
+
+		case *big.Int:
+			pushBigInt(val, jst.vm)
+
+		default:
+			panic(fmt.Sprintf("unsupported type: %T", val))
+		}
+		jst.vm.PutPropString(obj, key)
+	}
+	jst.vm.PutPropString(jst.stateObject, "ctx")
+
+	// Finalize the trace and return the results
+	result, err := jst.call("result", "ctx", "db")
+	if err != nil {
+		jst.err = wrapError("result", err)
+	}
+	// Clean up the JavaScript environment
+	jst.vm.DestroyHeap()
+	jst.vm.Destroy()
+
+	return result, jst.err
+}
diff --git a/eth/tracers/tracers.go b/eth/tracers/tracers.go
new file mode 100644
index 0000000..475ebd2
--- /dev/null
+++ b/eth/tracers/tracers.go
@@ -0,0 +1,53 @@
+// Copyright 2017 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 tracers is a collection of JavaScript transaction tracers.
+package tracers
+
+import (
+	"strings"
+	"unicode"
+
+	"github.com/ava-labs/coreth/eth/tracers/internal/tracers"
+)
+
+// all contains all the built in JavaScript tracers by name.
+var all = make(map[string]string)
+
+// camel converts a snake cased input string into a camel cased output.
+func camel(str string) string {
+	pieces := strings.Split(str, "_")
+	for i := 1; i < len(pieces); i++ {
+		pieces[i] = string(unicode.ToUpper(rune(pieces[i][0]))) + pieces[i][1:]
+	}
+	return strings.Join(pieces, "")
+}
+
+// init retrieves the JavaScript transaction tracers included in go-ethereum.
+func init() {
+	for _, file := range tracers.AssetNames() {
+		name := camel(strings.TrimSuffix(file, ".js"))
+		all[name] = string(tracers.MustAsset(file))
+	}
+}
+
+// tracer retrieves a specific JavaScript tracer by name.
+func tracer(name string) (string, bool) {
+	if tracer, ok := all[name]; ok {
+		return tracer, true
+	}
+	return "", false
+}