add necessary code base

13 files changed, 4684 insertions, 0 deletions

diff --git a/eth/api.go b/eth/api.go
new file mode 100644
index 0000000..34f41db
--- /dev/null
+++ b/eth/api.go
@@ -0,0 +1,533 @@
+// 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 (
+	"compress/gzip"
+	"context"
+	"errors"
+	"fmt"
+	"io"
+	"math/big"
+	"os"
+	"runtime"
+	"strings"
+	"time"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/core"
+	"github.com/ethereum/go-ethereum/core/rawdb"
+	"github.com/ethereum/go-ethereum/core/state"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/Determinant/coreth/internal/ethapi"
+	"github.com/ethereum/go-ethereum/rlp"
+	"github.com/ethereum/go-ethereum/rpc"
+	"github.com/ethereum/go-ethereum/trie"
+)
+
+// PublicEthereumAPI provides an API to access Ethereum full node-related
+// information.
+type PublicEthereumAPI struct {
+	e *Ethereum
+}
+
+// NewPublicEthereumAPI creates a new Ethereum protocol API for full nodes.
+func NewPublicEthereumAPI(e *Ethereum) *PublicEthereumAPI {
+	return &PublicEthereumAPI{e}
+}
+
+// Etherbase is the address that mining rewards will be send to
+func (api *PublicEthereumAPI) Etherbase() (common.Address, error) {
+	return api.e.Etherbase()
+}
+
+// Coinbase is the address that mining rewards will be send to (alias for Etherbase)
+func (api *PublicEthereumAPI) Coinbase() (common.Address, error) {
+	return api.Etherbase()
+}
+
+// Hashrate returns the POW hashrate
+func (api *PublicEthereumAPI) Hashrate() hexutil.Uint64 {
+	return hexutil.Uint64(api.e.Miner().HashRate())
+}
+
+// ChainId is the EIP-155 replay-protection chain id for the current ethereum chain config.
+func (api *PublicEthereumAPI) ChainId() hexutil.Uint64 {
+	chainID := new(big.Int)
+	if config := api.e.blockchain.Config(); config.IsEIP155(api.e.blockchain.CurrentBlock().Number()) {
+		chainID = config.ChainID
+	}
+	return (hexutil.Uint64)(chainID.Uint64())
+}
+
+// PublicMinerAPI provides an API to control the miner.
+// It offers only methods that operate on data that pose no security risk when it is publicly accessible.
+type PublicMinerAPI struct {
+	e *Ethereum
+}
+
+// NewPublicMinerAPI create a new PublicMinerAPI instance.
+func NewPublicMinerAPI(e *Ethereum) *PublicMinerAPI {
+	return &PublicMinerAPI{e}
+}
+
+// Mining returns an indication if this node is currently mining.
+func (api *PublicMinerAPI) Mining() bool {
+	return api.e.IsMining()
+}
+
+// PrivateMinerAPI provides private RPC methods to control the miner.
+// These methods can be abused by external users and must be considered insecure for use by untrusted users.
+type PrivateMinerAPI struct {
+	e *Ethereum
+}
+
+// NewPrivateMinerAPI create a new RPC service which controls the miner of this node.
+func NewPrivateMinerAPI(e *Ethereum) *PrivateMinerAPI {
+	return &PrivateMinerAPI{e: e}
+}
+
+// Start starts the miner with the given number of threads. If threads is nil,
+// the number of workers started is equal to the number of logical CPUs that are
+// usable by this process. If mining is already running, this method adjust the
+// number of threads allowed to use and updates the minimum price required by the
+// transaction pool.
+func (api *PrivateMinerAPI) Start(threads *int) error {
+	if threads == nil {
+		return api.e.StartMining(runtime.NumCPU())
+	}
+	return api.e.StartMining(*threads)
+}
+
+// Stop terminates the miner, both at the consensus engine level as well as at
+// the block creation level.
+func (api *PrivateMinerAPI) Stop() {
+	api.e.StopMining()
+}
+
+// SetExtra sets the extra data string that is included when this miner mines a block.
+func (api *PrivateMinerAPI) SetExtra(extra string) (bool, error) {
+	if err := api.e.Miner().SetExtra([]byte(extra)); err != nil {
+		return false, err
+	}
+	return true, nil
+}
+
+// SetGasPrice sets the minimum accepted gas price for the miner.
+func (api *PrivateMinerAPI) SetGasPrice(gasPrice hexutil.Big) bool {
+	api.e.lock.Lock()
+	api.e.gasPrice = (*big.Int)(&gasPrice)
+	api.e.lock.Unlock()
+
+	api.e.txPool.SetGasPrice((*big.Int)(&gasPrice))
+	return true
+}
+
+// SetEtherbase sets the etherbase of the miner
+func (api *PrivateMinerAPI) SetEtherbase(etherbase common.Address) bool {
+	api.e.SetEtherbase(etherbase)
+	return true
+}
+
+// SetRecommitInterval updates the interval for miner sealing work recommitting.
+func (api *PrivateMinerAPI) SetRecommitInterval(interval int) {
+	api.e.Miner().SetRecommitInterval(time.Duration(interval) * time.Millisecond)
+}
+
+// GetHashrate returns the current hashrate of the miner.
+func (api *PrivateMinerAPI) GetHashrate() uint64 {
+	return api.e.miner.HashRate()
+}
+
+// PrivateAdminAPI is the collection of Ethereum full node-related APIs
+// exposed over the private admin endpoint.
+type PrivateAdminAPI struct {
+	eth *Ethereum
+}
+
+// NewPrivateAdminAPI creates a new API definition for the full node private
+// admin methods of the Ethereum service.
+func NewPrivateAdminAPI(eth *Ethereum) *PrivateAdminAPI {
+	return &PrivateAdminAPI{eth: eth}
+}
+
+// ExportChain exports the current blockchain into a local file.
+func (api *PrivateAdminAPI) ExportChain(file string) (bool, error) {
+	// Make sure we can create the file to export into
+	out, err := os.OpenFile(file, os.O_CREATE|os.O_WRONLY|os.O_TRUNC, os.ModePerm)
+	if err != nil {
+		return false, err
+	}
+	defer out.Close()
+
+	var writer io.Writer = out
+	if strings.HasSuffix(file, ".gz") {
+		writer = gzip.NewWriter(writer)
+		defer writer.(*gzip.Writer).Close()
+	}
+
+	// Export the blockchain
+	if err := api.eth.BlockChain().Export(writer); err != nil {
+		return false, err
+	}
+	return true, nil
+}
+
+func hasAllBlocks(chain *core.BlockChain, bs []*types.Block) bool {
+	for _, b := range bs {
+		if !chain.HasBlock(b.Hash(), b.NumberU64()) {
+			return false
+		}
+	}
+
+	return true
+}
+
+// ImportChain imports a blockchain from a local file.
+func (api *PrivateAdminAPI) ImportChain(file string) (bool, error) {
+	// Make sure the can access the file to import
+	in, err := os.Open(file)
+	if err != nil {
+		return false, err
+	}
+	defer in.Close()
+
+	var reader io.Reader = in
+	if strings.HasSuffix(file, ".gz") {
+		if reader, err = gzip.NewReader(reader); err != nil {
+			return false, err
+		}
+	}
+
+	// Run actual the import in pre-configured batches
+	stream := rlp.NewStream(reader, 0)
+
+	blocks, index := make([]*types.Block, 0, 2500), 0
+	for batch := 0; ; batch++ {
+		// Load a batch of blocks from the input file
+		for len(blocks) < cap(blocks) {
+			block := new(types.Block)
+			if err := stream.Decode(block); err == io.EOF {
+				break
+			} else if err != nil {
+				return false, fmt.Errorf("block %d: failed to parse: %v", index, err)
+			}
+			blocks = append(blocks, block)
+			index++
+		}
+		if len(blocks) == 0 {
+			break
+		}
+
+		if hasAllBlocks(api.eth.BlockChain(), blocks) {
+			blocks = blocks[:0]
+			continue
+		}
+		// Import the batch and reset the buffer
+		if _, err := api.eth.BlockChain().InsertChain(blocks); err != nil {
+			return false, fmt.Errorf("batch %d: failed to insert: %v", batch, err)
+		}
+		blocks = blocks[:0]
+	}
+	return true, nil
+}
+
+// PublicDebugAPI is the collection of Ethereum full node APIs exposed
+// over the public debugging endpoint.
+type PublicDebugAPI struct {
+	eth *Ethereum
+}
+
+// NewPublicDebugAPI creates a new API definition for the full node-
+// related public debug methods of the Ethereum service.
+func NewPublicDebugAPI(eth *Ethereum) *PublicDebugAPI {
+	return &PublicDebugAPI{eth: eth}
+}
+
+// DumpBlock retrieves the entire state of the database at a given block.
+func (api *PublicDebugAPI) DumpBlock(blockNr rpc.BlockNumber) (state.Dump, error) {
+	if blockNr == rpc.PendingBlockNumber {
+		// If we're dumping the pending state, we need to request
+		// both the pending block as well as the pending state from
+		// the miner and operate on those
+		_, stateDb := api.eth.miner.Pending()
+		return stateDb.RawDump(false, false, true), nil
+	}
+	var block *types.Block
+	if blockNr == rpc.LatestBlockNumber {
+		block = api.eth.blockchain.CurrentBlock()
+	} else {
+		block = api.eth.blockchain.GetBlockByNumber(uint64(blockNr))
+	}
+	if block == nil {
+		return state.Dump{}, fmt.Errorf("block #%d not found", blockNr)
+	}
+	stateDb, err := api.eth.BlockChain().StateAt(block.Root())
+	if err != nil {
+		return state.Dump{}, err
+	}
+	return stateDb.RawDump(false, false, true), nil
+}
+
+// PrivateDebugAPI is the collection of Ethereum full node APIs exposed over
+// the private debugging endpoint.
+type PrivateDebugAPI struct {
+	eth *Ethereum
+}
+
+// NewPrivateDebugAPI creates a new API definition for the full node-related
+// private debug methods of the Ethereum service.
+func NewPrivateDebugAPI(eth *Ethereum) *PrivateDebugAPI {
+	return &PrivateDebugAPI{eth: eth}
+}
+
+// Preimage is a debug API function that returns the preimage for a sha3 hash, if known.
+func (api *PrivateDebugAPI) Preimage(ctx context.Context, hash common.Hash) (hexutil.Bytes, error) {
+	if preimage := rawdb.ReadPreimage(api.eth.ChainDb(), hash); preimage != nil {
+		return preimage, nil
+	}
+	return nil, errors.New("unknown preimage")
+}
+
+// BadBlockArgs represents the entries in the list returned when bad blocks are queried.
+type BadBlockArgs struct {
+	Hash  common.Hash            `json:"hash"`
+	Block map[string]interface{} `json:"block"`
+	RLP   string                 `json:"rlp"`
+}
+
+// GetBadBlocks returns a list of the last 'bad blocks' that the client has seen on the network
+// and returns them as a JSON list of block-hashes
+func (api *PrivateDebugAPI) GetBadBlocks(ctx context.Context) ([]*BadBlockArgs, error) {
+	blocks := api.eth.BlockChain().BadBlocks()
+	results := make([]*BadBlockArgs, len(blocks))
+
+	var err error
+	for i, block := range blocks {
+		results[i] = &BadBlockArgs{
+			Hash: block.Hash(),
+		}
+		if rlpBytes, err := rlp.EncodeToBytes(block); err != nil {
+			results[i].RLP = err.Error() // Hacky, but hey, it works
+		} else {
+			results[i].RLP = fmt.Sprintf("0x%x", rlpBytes)
+		}
+		if results[i].Block, err = ethapi.RPCMarshalBlock(block, true, true); err != nil {
+			results[i].Block = map[string]interface{}{"error": err.Error()}
+		}
+	}
+	return results, nil
+}
+
+// AccountRangeResult returns a mapping from the hash of an account addresses
+// to its preimage. It will return the JSON null if no preimage is found.
+// Since a query can return a limited amount of results, a "next" field is
+// also present for paging.
+type AccountRangeResult struct {
+	Accounts map[common.Hash]*common.Address `json:"accounts"`
+	Next     common.Hash                     `json:"next"`
+}
+
+func accountRange(st state.Trie, start *common.Hash, maxResults int) (AccountRangeResult, error) {
+	if start == nil {
+		start = &common.Hash{0}
+	}
+	it := trie.NewIterator(st.NodeIterator(start.Bytes()))
+	result := AccountRangeResult{Accounts: make(map[common.Hash]*common.Address), Next: common.Hash{}}
+
+	if maxResults > AccountRangeMaxResults {
+		maxResults = AccountRangeMaxResults
+	}
+
+	for i := 0; i < maxResults && it.Next(); i++ {
+		if preimage := st.GetKey(it.Key); preimage != nil {
+			addr := &common.Address{}
+			addr.SetBytes(preimage)
+			result.Accounts[common.BytesToHash(it.Key)] = addr
+		} else {
+			result.Accounts[common.BytesToHash(it.Key)] = nil
+		}
+	}
+
+	if it.Next() {
+		result.Next = common.BytesToHash(it.Key)
+	}
+
+	return result, nil
+}
+
+// AccountRangeMaxResults is the maximum number of results to be returned per call
+const AccountRangeMaxResults = 256
+
+// AccountRange enumerates all accounts in the latest state
+func (api *PrivateDebugAPI) AccountRange(ctx context.Context, start *common.Hash, maxResults int) (AccountRangeResult, error) {
+	var statedb *state.StateDB
+	var err error
+	block := api.eth.blockchain.CurrentBlock()
+
+	if len(block.Transactions()) == 0 {
+		statedb, err = api.computeStateDB(block, defaultTraceReexec)
+		if err != nil {
+			return AccountRangeResult{}, err
+		}
+	} else {
+		_, _, statedb, err = api.computeTxEnv(block.Hash(), len(block.Transactions())-1, 0)
+		if err != nil {
+			return AccountRangeResult{}, err
+		}
+	}
+
+	trie, err := statedb.Database().OpenTrie(block.Header().Root)
+	if err != nil {
+		return AccountRangeResult{}, err
+	}
+
+	return accountRange(trie, start, maxResults)
+}
+
+// StorageRangeResult is the result of a debug_storageRangeAt API call.
+type StorageRangeResult struct {
+	Storage storageMap   `json:"storage"`
+	NextKey *common.Hash `json:"nextKey"` // nil if Storage includes the last key in the trie.
+}
+
+type storageMap map[common.Hash]storageEntry
+
+type storageEntry struct {
+	Key   *common.Hash `json:"key"`
+	Value common.Hash  `json:"value"`
+}
+
+// StorageRangeAt returns the storage at the given block height and transaction index.
+func (api *PrivateDebugAPI) StorageRangeAt(ctx context.Context, blockHash common.Hash, txIndex int, contractAddress common.Address, keyStart hexutil.Bytes, maxResult int) (StorageRangeResult, error) {
+	_, _, statedb, err := api.computeTxEnv(blockHash, txIndex, 0)
+	if err != nil {
+		return StorageRangeResult{}, err
+	}
+	st := statedb.StorageTrie(contractAddress)
+	if st == nil {
+		return StorageRangeResult{}, fmt.Errorf("account %x doesn't exist", contractAddress)
+	}
+	return storageRangeAt(st, keyStart, maxResult)
+}
+
+func storageRangeAt(st state.Trie, start []byte, maxResult int) (StorageRangeResult, error) {
+	it := trie.NewIterator(st.NodeIterator(start))
+	result := StorageRangeResult{Storage: storageMap{}}
+	for i := 0; i < maxResult && it.Next(); i++ {
+		_, content, _, err := rlp.Split(it.Value)
+		if err != nil {
+			return StorageRangeResult{}, err
+		}
+		e := storageEntry{Value: common.BytesToHash(content)}
+		if preimage := st.GetKey(it.Key); preimage != nil {
+			preimage := common.BytesToHash(preimage)
+			e.Key = &preimage
+		}
+		result.Storage[common.BytesToHash(it.Key)] = e
+	}
+	// Add the 'next key' so clients can continue downloading.
+	if it.Next() {
+		next := common.BytesToHash(it.Key)
+		result.NextKey = &next
+	}
+	return result, nil
+}
+
+// GetModifiedAccountsByNumber returns all accounts that have changed between the
+// two blocks specified. A change is defined as a difference in nonce, balance,
+// code hash, or storage hash.
+//
+// With one parameter, returns the list of accounts modified in the specified block.
+func (api *PrivateDebugAPI) GetModifiedAccountsByNumber(startNum uint64, endNum *uint64) ([]common.Address, error) {
+	var startBlock, endBlock *types.Block
+
+	startBlock = api.eth.blockchain.GetBlockByNumber(startNum)
+	if startBlock == nil {
+		return nil, fmt.Errorf("start block %x not found", startNum)
+	}
+
+	if endNum == nil {
+		endBlock = startBlock
+		startBlock = api.eth.blockchain.GetBlockByHash(startBlock.ParentHash())
+		if startBlock == nil {
+			return nil, fmt.Errorf("block %x has no parent", endBlock.Number())
+		}
+	} else {
+		endBlock = api.eth.blockchain.GetBlockByNumber(*endNum)
+		if endBlock == nil {
+			return nil, fmt.Errorf("end block %d not found", *endNum)
+		}
+	}
+	return api.getModifiedAccounts(startBlock, endBlock)
+}
+
+// GetModifiedAccountsByHash returns all accounts that have changed between the
+// two blocks specified. A change is defined as a difference in nonce, balance,
+// code hash, or storage hash.
+//
+// With one parameter, returns the list of accounts modified in the specified block.
+func (api *PrivateDebugAPI) GetModifiedAccountsByHash(startHash common.Hash, endHash *common.Hash) ([]common.Address, error) {
+	var startBlock, endBlock *types.Block
+	startBlock = api.eth.blockchain.GetBlockByHash(startHash)
+	if startBlock == nil {
+		return nil, fmt.Errorf("start block %x not found", startHash)
+	}
+
+	if endHash == nil {
+		endBlock = startBlock
+		startBlock = api.eth.blockchain.GetBlockByHash(startBlock.ParentHash())
+		if startBlock == nil {
+			return nil, fmt.Errorf("block %x has no parent", endBlock.Number())
+		}
+	} else {
+		endBlock = api.eth.blockchain.GetBlockByHash(*endHash)
+		if endBlock == nil {
+			return nil, fmt.Errorf("end block %x not found", *endHash)
+		}
+	}
+	return api.getModifiedAccounts(startBlock, endBlock)
+}
+
+func (api *PrivateDebugAPI) getModifiedAccounts(startBlock, endBlock *types.Block) ([]common.Address, error) {
+	if startBlock.Number().Uint64() >= endBlock.Number().Uint64() {
+		return nil, fmt.Errorf("start block height (%d) must be less than end block height (%d)", startBlock.Number().Uint64(), endBlock.Number().Uint64())
+	}
+	triedb := api.eth.BlockChain().StateCache().TrieDB()
+
+	oldTrie, err := trie.NewSecure(startBlock.Root(), triedb)
+	if err != nil {
+		return nil, err
+	}
+	newTrie, err := trie.NewSecure(endBlock.Root(), triedb)
+	if err != nil {
+		return nil, err
+	}
+	diff, _ := trie.NewDifferenceIterator(oldTrie.NodeIterator([]byte{}), newTrie.NodeIterator([]byte{}))
+	iter := trie.NewIterator(diff)
+
+	var dirty []common.Address
+	for iter.Next() {
+		key := newTrie.GetKey(iter.Key)
+		if key == nil {
+			return nil, fmt.Errorf("no preimage found for hash %x", iter.Key)
+		}
+		dirty = append(dirty, common.BytesToAddress(key))
+	}
+	return dirty, nil
+}
diff --git a/eth/api_backend.go b/eth/api_backend.go
new file mode 100644
index 0000000..69904a7
--- /dev/null
+++ b/eth/api_backend.go
@@ -0,0 +1,244 @@
+// 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 (
+	"context"
+	"errors"
+	"math/big"
+
+	"github.com/ethereum/go-ethereum/accounts"
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/math"
+	"github.com/ethereum/go-ethereum/core"
+	"github.com/ethereum/go-ethereum/core/bloombits"
+	"github.com/ethereum/go-ethereum/core/rawdb"
+	"github.com/ethereum/go-ethereum/core/state"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/core/vm"
+	"github.com/ethereum/go-ethereum/eth/downloader"
+	"github.com/ethereum/go-ethereum/eth/gasprice"
+	"github.com/ethereum/go-ethereum/ethdb"
+	"github.com/ethereum/go-ethereum/event"
+	"github.com/ethereum/go-ethereum/params"
+	"github.com/ethereum/go-ethereum/rpc"
+)
+
+// EthAPIBackend implements ethapi.Backend for full nodes
+type EthAPIBackend struct {
+	extRPCEnabled bool
+	eth           *Ethereum
+	gpo           *gasprice.Oracle
+}
+
+// ChainConfig returns the active chain configuration.
+func (b *EthAPIBackend) ChainConfig() *params.ChainConfig {
+	return b.eth.blockchain.Config()
+}
+
+func (b *EthAPIBackend) CurrentBlock() *types.Block {
+	return b.eth.blockchain.CurrentBlock()
+}
+
+func (b *EthAPIBackend) SetHead(number uint64) {
+	b.eth.protocolManager.downloader.Cancel()
+	b.eth.blockchain.SetHead(number)
+}
+
+func (b *EthAPIBackend) HeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Header, error) {
+	// Pending block is only known by the miner
+	if number == rpc.PendingBlockNumber {
+		block := b.eth.miner.PendingBlock()
+		return block.Header(), nil
+	}
+	// Otherwise resolve and return the block
+	if number == rpc.LatestBlockNumber {
+		return b.eth.blockchain.CurrentBlock().Header(), nil
+	}
+	return b.eth.blockchain.GetHeaderByNumber(uint64(number)), nil
+}
+
+func (b *EthAPIBackend) HeaderByHash(ctx context.Context, hash common.Hash) (*types.Header, error) {
+	return b.eth.blockchain.GetHeaderByHash(hash), nil
+}
+
+func (b *EthAPIBackend) BlockByNumber(ctx context.Context, number rpc.BlockNumber) (*types.Block, error) {
+	// Pending block is only known by the miner
+	if number == rpc.PendingBlockNumber {
+		block := b.eth.miner.PendingBlock()
+		return block, nil
+	}
+	// Otherwise resolve and return the block
+	if number == rpc.LatestBlockNumber {
+		return b.eth.blockchain.CurrentBlock(), nil
+	}
+	return b.eth.blockchain.GetBlockByNumber(uint64(number)), nil
+}
+
+func (b *EthAPIBackend) BlockByHash(ctx context.Context, hash common.Hash) (*types.Block, error) {
+	return b.eth.blockchain.GetBlockByHash(hash), nil
+}
+
+func (b *EthAPIBackend) StateAndHeaderByNumber(ctx context.Context, number rpc.BlockNumber) (*state.StateDB, *types.Header, error) {
+	// Pending state is only known by the miner
+	if number == rpc.PendingBlockNumber {
+		block, state := b.eth.miner.Pending()
+		return state, block.Header(), nil
+	}
+	// Otherwise resolve the block number and return its state
+	header, err := b.HeaderByNumber(ctx, number)
+	if err != nil {
+		return nil, nil, err
+	}
+	if header == nil {
+		return nil, nil, errors.New("header not found")
+	}
+	stateDb, err := b.eth.BlockChain().StateAt(header.Root)
+	return stateDb, header, err
+}
+
+func (b *EthAPIBackend) GetReceipts(ctx context.Context, hash common.Hash) (types.Receipts, error) {
+	return b.eth.blockchain.GetReceiptsByHash(hash), nil
+}
+
+func (b *EthAPIBackend) GetLogs(ctx context.Context, hash common.Hash) ([][]*types.Log, error) {
+	receipts := b.eth.blockchain.GetReceiptsByHash(hash)
+	if receipts == nil {
+		return nil, nil
+	}
+	logs := make([][]*types.Log, len(receipts))
+	for i, receipt := range receipts {
+		logs[i] = receipt.Logs
+	}
+	return logs, nil
+}
+
+func (b *EthAPIBackend) GetTd(blockHash common.Hash) *big.Int {
+	return b.eth.blockchain.GetTdByHash(blockHash)
+}
+
+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 }
+
+	context := core.NewEVMContext(msg, header, b.eth.BlockChain(), nil)
+	return vm.NewEVM(context, state, b.eth.blockchain.Config(), *b.eth.blockchain.GetVMConfig()), vmError, nil
+}
+
+func (b *EthAPIBackend) SubscribeRemovedLogsEvent(ch chan<- core.RemovedLogsEvent) event.Subscription {
+	return b.eth.BlockChain().SubscribeRemovedLogsEvent(ch)
+}
+
+func (b *EthAPIBackend) SubscribeChainEvent(ch chan<- core.ChainEvent) event.Subscription {
+	return b.eth.BlockChain().SubscribeChainEvent(ch)
+}
+
+func (b *EthAPIBackend) SubscribeChainHeadEvent(ch chan<- core.ChainHeadEvent) event.Subscription {
+	return b.eth.BlockChain().SubscribeChainHeadEvent(ch)
+}
+
+func (b *EthAPIBackend) SubscribeChainSideEvent(ch chan<- core.ChainSideEvent) event.Subscription {
+	return b.eth.BlockChain().SubscribeChainSideEvent(ch)
+}
+
+func (b *EthAPIBackend) SubscribeLogsEvent(ch chan<- []*types.Log) event.Subscription {
+	return b.eth.BlockChain().SubscribeLogsEvent(ch)
+}
+
+func (b *EthAPIBackend) SendTx(ctx context.Context, signedTx *types.Transaction) error {
+	return b.eth.txPool.AddLocal(signedTx)
+}
+
+func (b *EthAPIBackend) GetPoolTransactions() (types.Transactions, error) {
+	pending, err := b.eth.txPool.Pending()
+	if err != nil {
+		return nil, err
+	}
+	var txs types.Transactions
+	for _, batch := range pending {
+		txs = append(txs, batch...)
+	}
+	return txs, nil
+}
+
+func (b *EthAPIBackend) GetPoolTransaction(hash common.Hash) *types.Transaction {
+	return b.eth.txPool.Get(hash)
+}
+
+func (b *EthAPIBackend) GetTransaction(ctx context.Context, txHash common.Hash) (*types.Transaction, common.Hash, uint64, uint64, error) {
+	tx, blockHash, blockNumber, index := rawdb.ReadTransaction(b.eth.ChainDb(), txHash)
+	return tx, blockHash, blockNumber, index, nil
+}
+
+func (b *EthAPIBackend) GetPoolNonce(ctx context.Context, addr common.Address) (uint64, error) {
+	return b.eth.txPool.Nonce(addr), nil
+}
+
+func (b *EthAPIBackend) Stats() (pending int, queued int) {
+	return b.eth.txPool.Stats()
+}
+
+func (b *EthAPIBackend) TxPoolContent() (map[common.Address]types.Transactions, map[common.Address]types.Transactions) {
+	return b.eth.TxPool().Content()
+}
+
+func (b *EthAPIBackend) SubscribeNewTxsEvent(ch chan<- core.NewTxsEvent) event.Subscription {
+	return b.eth.TxPool().SubscribeNewTxsEvent(ch)
+}
+
+func (b *EthAPIBackend) Downloader() *downloader.Downloader {
+	return b.eth.Downloader()
+}
+
+func (b *EthAPIBackend) ProtocolVersion() int {
+	return b.eth.EthVersion()
+}
+
+func (b *EthAPIBackend) SuggestPrice(ctx context.Context) (*big.Int, error) {
+	return b.gpo.SuggestPrice(ctx)
+}
+
+func (b *EthAPIBackend) ChainDb() ethdb.Database {
+	return b.eth.ChainDb()
+}
+
+func (b *EthAPIBackend) EventMux() *event.TypeMux {
+	return b.eth.EventMux()
+}
+
+func (b *EthAPIBackend) AccountManager() *accounts.Manager {
+	return b.eth.AccountManager()
+}
+
+func (b *EthAPIBackend) ExtRPCEnabled() bool {
+	return b.extRPCEnabled
+}
+
+func (b *EthAPIBackend) RPCGasCap() *big.Int {
+	return b.eth.config.RPCGasCap
+}
+
+func (b *EthAPIBackend) BloomStatus() (uint64, uint64) {
+	sections, _, _ := b.eth.bloomIndexer.Sections()
+	return params.BloomBitsBlocks, sections
+}
+
+func (b *EthAPIBackend) ServiceFilter(ctx context.Context, session *bloombits.MatcherSession) {
+	for i := 0; i < bloomFilterThreads; i++ {
+		go session.Multiplex(bloomRetrievalBatch, bloomRetrievalWait, b.eth.bloomRequests)
+	}
+}
diff --git a/eth/api_tracer.go b/eth/api_tracer.go
new file mode 100644
index 0000000..7d983fa
--- /dev/null
+++ b/eth/api_tracer.go
@@ -0,0 +1,823 @@
+// 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 eth
+
+import (
+	"bufio"
+	"bytes"
+	"context"
+	"errors"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"runtime"
+	"sync"
+	"time"
+
+	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/common/hexutil"
+	"github.com/ethereum/go-ethereum/core"
+	"github.com/ethereum/go-ethereum/core/rawdb"
+	"github.com/ethereum/go-ethereum/core/state"
+	"github.com/ethereum/go-ethereum/core/types"
+	"github.com/ethereum/go-ethereum/core/vm"
+	"github.com/ethereum/go-ethereum/eth/tracers"
+	"github.com/Determinant/coreth/internal/ethapi"
+	"github.com/ethereum/go-ethereum/log"
+	"github.com/ethereum/go-ethereum/rlp"
+	"github.com/ethereum/go-ethereum/rpc"
+	"github.com/ethereum/go-ethereum/trie"
+)
+
+const (
+	// defaultTraceTimeout is the amount of time a single transaction can execute
+	// by default before being forcefully aborted.
+	defaultTraceTimeout = 5 * time.Second
+
+	// defaultTraceReexec is the number of blocks the tracer is willing to go back
+	// and reexecute to produce missing historical state necessary to run a specific
+	// trace.
+	defaultTraceReexec = uint64(128)
+)
+
+// TraceConfig holds extra parameters to trace functions.
+type TraceConfig struct {
+	*vm.LogConfig
+	Tracer  *string
+	Timeout *string
+	Reexec  *uint64
+}
+
+// StdTraceConfig holds extra parameters to standard-json trace functions.
+type StdTraceConfig struct {
+	*vm.LogConfig
+	Reexec *uint64
+	TxHash common.Hash
+}
+
+// txTraceResult is the result of a single transaction trace.
+type txTraceResult struct {
+	Result interface{} `json:"result,omitempty"` // Trace results produced by the tracer
+	Error  string      `json:"error,omitempty"`  // Trace failure produced by the tracer
+}
+
+// blockTraceTask represents a single block trace task when an entire chain is
+// being traced.
+type blockTraceTask struct {
+	statedb *state.StateDB   // Intermediate state prepped for tracing
+	block   *types.Block     // Block to trace the transactions from
+	rootref common.Hash      // Trie root reference held for this task
+	results []*txTraceResult // Trace results procudes by the task
+}
+
+// blockTraceResult represets the results of tracing a single block when an entire
+// chain is being traced.
+type blockTraceResult struct {
+	Block  hexutil.Uint64   `json:"block"`  // Block number corresponding to this trace
+	Hash   common.Hash      `json:"hash"`   // Block hash corresponding to this trace
+	Traces []*txTraceResult `json:"traces"` // Trace results produced by the task
+}
+
+// txTraceTask represents a single transaction trace task when an entire block
+// is being traced.
+type txTraceTask struct {
+	statedb *state.StateDB // Intermediate state prepped for tracing
+	index   int            // Transaction offset in the block
+}
+
+// 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 rpc.BlockNumber, config *TraceConfig) (*rpc.Subscription, error) {
+	// Fetch the block interval that we want to trace
+	var from, to *types.Block
+
+	switch start {
+	case rpc.PendingBlockNumber:
+		from = api.eth.miner.PendingBlock()
+	case rpc.LatestBlockNumber:
+		from = api.eth.blockchain.CurrentBlock()
+	default:
+		from = api.eth.blockchain.GetBlockByNumber(uint64(start))
+	}
+	switch end {
+	case rpc.PendingBlockNumber:
+		to = api.eth.miner.PendingBlock()
+	case rpc.LatestBlockNumber:
+		to = api.eth.blockchain.CurrentBlock()
+	default:
+		to = api.eth.blockchain.GetBlockByNumber(uint64(end))
+	}
+	// Trace the chain if we've found all our blocks
+	if from == nil {
+		return nil, fmt.Errorf("starting block #%d not found", start)
+	}
+	if to == nil {
+		return nil, fmt.Errorf("end block #%d not found", end)
+	}
+	if from.Number().Cmp(to.Number()) >= 0 {
+		return nil, fmt.Errorf("end block (#%d) needs to come after start block (#%d)", end, start)
+	}
+	return api.traceChain(ctx, from, to, config)
+}
+
+// traceChain configures a new tracer according to the provided configuration, and
+// executes all the