package api
import (
"bytes"
"encoding/json"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/eth"
"github.com/ethereum/go-ethereum/rpc/codec"
"github.com/ethereum/go-ethereum/rpc/shared"
"github.com/ethereum/go-ethereum/xeth"
"gopkg.in/fatih/set.v0"
)
const (
EthApiVersion = "1.0"
)
// eth api provider
// See https://github.com/ethereum/wiki/wiki/JSON-RPC
type ethApi struct {
xeth *xeth.XEth
ethereum *eth.Ethereum
methods map[string]ethhandler
codec codec.ApiCoder
}
// eth callback handler
type ethhandler func(*ethApi, *shared.Request) (interface{}, error)
var (
ethMapping = map[string]ethhandler{
"eth_accounts": (*ethApi).Accounts,
"eth_blockNumber": (*ethApi).BlockNumber,
"eth_getBalance": (*ethApi).GetBalance,
"eth_protocolVersion": (*ethApi).ProtocolVersion,
"eth_coinbase": (*ethApi).Coinbase,
"eth_mining": (*ethApi).IsMining,
"eth_gasPrice": (*ethApi).GasPrice,
"eth_getStorage": (*ethApi).GetStorage,
"eth_storageAt": (*ethApi).GetStorage,
"eth_getStorageAt": (*ethApi).GetStorageAt,
"eth_getTransactionCount": (*ethApi).GetTransactionCount,
"eth_getBlockTransactionCountByHash": (*ethApi).GetBlockTransactionCountByHash,
"eth_getBlockTransactionCountByNumber": (*ethApi).GetBlockTransactionCountByNumber,
"eth_getUncleCountByBlockHash": (*ethApi).GetUncleCountByBlockHash,
"eth_getUncleCountByBlockNumber": (*ethApi).GetUncleCountByBlockNumber,
"eth_getData": (*ethApi).GetData,
"eth_getCode": (*ethApi).GetData,
"eth_sign": (*ethApi).Sign,
"eth_sendRawTransaction": (*ethApi).SendRawTransaction,
"eth_sendTransaction": (*ethApi).SendTransaction,
"eth_transact": (*ethApi).SendTransaction,
"eth_estimateGas": (*ethApi).EstimateGas,
"eth_call": (*ethApi).Call,
"eth_flush": (*ethApi).Flush,
"eth_getBlockByHash": (*ethApi).GetBlockByHash,
"eth_getBlockByNumber": (*ethApi).GetBlockByNumber,
"eth_getTransactionByHash": (*ethApi).GetTransactionByHash,
"eth_getTransactionByBlockNumberAndIndex": (*ethApi).GetTransactionByBlockNumberAndIndex,
"eth_getTransactionByBlockHashAndIndex": (*ethApi).GetTransactionByBlockHashAndIndex,
"eth_getUncleByBlockHashAndIndex": (*ethApi).GetUncleByBlockHashAndIndex,
"eth_getUncleByBlockNumberAndIndex": (*ethApi).GetUncleByBlockNumberAndIndex,
"eth_getCompilers": (*ethApi).GetCompilers,
"eth_compileSolidity": (*ethApi).CompileSolidity,
"eth_newFilter": (*ethApi).NewFilter,
"eth_newBlockFilter": (*ethApi).NewBlockFilter,
"eth_newPendingTransactionFilter": (*ethApi).NewPendingTransactionFilter,
"eth_uninstallFilter": (*ethApi).UninstallFilter,
"eth_getFilterChanges": (*ethApi).GetFilterChanges,
"eth_getFilterLogs": (*ethApi).GetFilterLogs,
"eth_getLogs": (*ethApi).GetLogs,
"eth_hashrate": (*ethApi).Hashrate,
"eth_getWork": (*ethApi).GetWork,
"eth_submitWork": (*ethApi).SubmitWork,
"eth_pendingTransactions": (*ethApi).PendingTransactions,
}
)
// create new ethApi instance
func NewEthApi(xeth *xeth.XEth, eth *eth.Ethereum, codec codec.Codec) *ethApi {
return ðApi{xeth, eth, ethMapping, codec.New(nil)}
}
// collection with supported methods
func (self *ethApi) Methods() []string {
methods := make([]string, len(self.methods))
i := 0
for k := range self.methods {
methods[i] = k
i++
}
return methods
}
// Execute given request
func (self *ethApi) Execute(req *shared.Request) (interface{}, error) {
if callback, ok := self.methods[req.Method]; ok {
return callback(self, req)
}
return nil, shared.NewNotImplementedError(req.Method)
}
func (self *ethApi) Name() string {
return shared.EthApiName
}
func (self *ethApi) ApiVersion() string {
return EthApiVersion
}
func (self *ethApi) Accounts(req *shared.Request) (interface{}, error) {
return self.xeth.Accounts(), nil
}
func (self *ethApi) Hashrate(req *shared.Request) (interface{}, error) {
return newHexNum(self.xeth.HashRate()), nil
}
func (self *ethApi) BlockNumber(req *shared.Request) (interface{}, error) {
num := self.xeth.CurrentBlock().Number()
return newHexNum(num.Bytes()), nil
}
func (self *ethApi) GetBalance(req *shared.Request) (interface{}, error) {
args := new(GetBalanceArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
return self.xeth.AtStateNum(args.BlockNumber).BalanceAt(args.Address), nil
}
func (self *ethApi) ProtocolVersion(req *shared.Request) (interface{}, error) {
return self.xeth.EthVersion(), nil
}
func (self *ethApi) Coinbase(req *shared.Request) (interface{}, error) {
return newHexData(self.xeth.Coinbase()), nil
}
func (self *ethApi) IsMining(req *shared.Request) (interface{}, error) {
return self.xeth.IsMining(), nil
}
func (self *ethApi) GasPrice(req *shared.Request) (interface{}, error) {
return newHexNum(self.xeth.DefaultGasPrice().Bytes()), nil
}
func (self *ethApi) GetStorage(req *shared.Request) (interface{}, error) {
args := new(GetStorageArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
return self.xeth.AtStateNum(args.BlockNumber).State().SafeGet(args.Address).Storage(), nil
}
func (self *ethApi) GetStorageAt(req *shared.Request) (interface{}, error) {
args := new(GetStorageAtArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
return self.xeth.AtStateNum(args.BlockNumber).StorageAt(args.Address, args.Key), nil
}
func (self *ethApi) GetTransactionCount(req *shared.Request) (interface{}, error) {
args := new(GetTxCountArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
count := self.xeth.AtStateNum(args.BlockNumber).TxCountAt(args.Address)
return newHexNum(big.NewInt(int64(count)).Bytes()), nil
}
func (self *ethApi) GetBlockTransactionCountByHash(req *shared.Request) (interface{}, error) {
args := new(HashArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
block := NewBlockRes(self.xeth.EthBlockByHash(args.Hash), false)
if block == nil {
return nil, nil
} else {
return newHexNum(big.NewInt(int64(len(block.Transactions))).Bytes()), nil
}
}
func (self *ethApi) GetBlockTransactionCountByNumber(req *shared.Request) (interface{}, error) {
args := new(BlockNumArg)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
block := NewBlockRes(self.xeth.EthBlockByNumber(args.BlockNumber), false)
if block == nil {
return nil, nil
} else {
return newHexNum(big.NewInt(int64(len(block.Transactions))).Bytes()), nil
}
}
func (self *ethApi) GetUncleCountByBlockHash(req *shared.Request) (interface{}, error) {
args := new(HashArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
block := self.xeth.EthBlockByHash(args.Hash)
br := NewBlockRes(block, false)
if br == nil {
return nil, nil
}
return newHexNum(big.NewInt(int64(len(br.Uncles))).Bytes()), nil
}
func (self *ethApi) GetUncleCountByBlockNumber(req *shared.Request) (interface{}, error) {
args := new(BlockNumArg)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
block := self.xeth.EthBlockByNumber(args.BlockNumber)
br := NewBlockRes(block, false)
if br == nil {
return nil, nil
}
return newHexNum(big.NewInt(int64(len(br.Uncles))).Bytes()), nil
}
func (self *ethApi) GetData(req *shared.Request) (interface{}, error) {
args := new(GetDataArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
v := self.xeth.AtStateNum(args.BlockNumber).CodeAtBytes(args.Address)
return newHexData(v), nil
}
func (self *ethApi) Sign(req *shared.Request) (interface{}, error) {
args := new(NewSigArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
v, err := self.xeth.Sign(args.From, args.Data, false)
if err != nil {
return nil, err
}
return v, nil
}
func (self *ethApi) SendRawTransaction(req *shared.Request) (interface{}, error) {
args := new(NewDataArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
v, err := self.xeth.PushTx(args.Data)
if err != nil {
return nil, err
}
return v, nil
}
func (self *ethApi) SendTransaction(req *shared.Request) (interface{}, error) {
args := new(NewTxArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
// nonce may be nil ("guess" mode)
var nonce string
if args.Nonce != nil {
nonce = args.Nonce.String()
}
var gas, price string
if args.Gas != nil {
gas = args.Gas.String()
}
if args.GasPrice != nil {
price = args.GasPrice.String()
}
v, err := self.xeth.Transact(args.From, args.To, nonce, args.Value.String(), gas, price, args.Data)
if err != nil {
return nil, err
}
return v, nil
}
func (self *ethApi) EstimateGas(req *shared.Request) (interface{}, error) {
_, gas, err := self.doCall(req.Params)
if err != nil {
return nil, err
}
// TODO unwrap the parent method's ToHex call
if len(gas) == 0 {
return newHexNum(0), nil
} else {
return newHexNum(gas), nil
}
}
func (self *ethApi) Call(req *shared.Request) (interface{}, error) {
v, _, err := self.doCall(req.Params)
if err != nil {
return nil, err
}
// TODO unwrap the parent method's ToHex call
if v == "0x0" {
return newHexData([]byte{}), nil
} else {
return newHexData(common.FromHex(v)), nil
}
}
func (self *ethApi) Flush(req *shared.Request) (interface{}, error) {
return nil, shared.NewNotImplementedError(req.Method)
}
func (self *ethApi) doCall(params json.RawMessage) (string, string, error) {
args := new(CallArgs)
if err := self.codec.Decode(params, &args); err != nil {
return "", "", err
}
return self.xeth.AtStateNum(args.BlockNumber).Call(args.From, args.To, args.Value.String(), args.Gas.String(), args.GasPrice.String(), args.Data)
}
func (self *ethApi) GetBlockByHash(req *shared.Request) (interface{}, error) {
args := new(GetBlockByHashArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
block := self.xeth.EthBlockByHash(args.BlockHash)
return NewBlockRes(block, args.IncludeTxs), nil
}
func (self *ethApi) GetBlockByNumber(req *shared.Request) (interface{}, error) {
args := new(GetBlockByNumberArgs)
if err := json.Unmarshal(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
block := self.xeth.EthBlockByNumber(args.BlockNumber)
br := NewBlockRes(block, args.IncludeTxs)
return br, nil
}
func (self *ethApi) GetTransactionByHash(req *shared.Request) (interface{}, error) {
args := new(HashArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
tx, bhash, bnum, txi := self.xeth.EthTransactionByHash(args.Hash)
if tx != nil {
v := NewTransactionRes(tx)
// if the blockhash is 0, assume this is a pending transaction
if bytes.Compare(bhash.Bytes(), bytes.Repeat([]byte{0}, 32)) != 0 {
v.BlockHash = newHexData(bhash)
v.BlockNumber = newHexNum(bnum)
v.TxIndex = newHexNum(txi)
}
return v, nil
}
return nil, nil
}
func (self *ethApi) GetTransactionByBlockHashAndIndex(req *shared.Request) (interface{}, error) {
args := new(HashIndexArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
block := self.xeth.EthBlockByHash(args.Hash)
br := NewBlockRes(block, true)
if br == nil {
return nil, nil
}
if args.Index >= int64(len(br.Transactions)) || args.Index < 0 {
return nil, nil
} else {
return br.Transactions[args.Index], nil
}
}
func (self *ethApi) GetTransactionByBlockNumberAndIndex(req *shared.Request) (interface{}, error) {
args := new(BlockNumIndexArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
block := self.xeth.EthBlockByNumber(args.BlockNumber)
v := NewBlockRes(block, true)
if v == nil {
return nil, nil
}
if args.Index >= int64(len(v.Transactions)) || args.Index < 0 {
// return NewValidationError("Index", "does not exist")
return nil, nil
}
return v.Transactions[args.Index], nil
}
func (self *ethApi) GetUncleByBlockHashAndIndex(req *shared.Request) (interface{}, error) {
args := new(HashIndexArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
br := NewBlockRes(self.xeth.EthBlockByHash(args.Hash), false)
if br == nil {
return nil, nil
}
if args.Index >= int64(len(br.Uncles)) || args.Index < 0 {
// return NewValidationError("Index", "does not exist")
return nil, nil
}
return br.Uncles[args.Index], nil
}
func (self *ethApi) GetUncleByBlockNumberAndIndex(req *shared.Request) (interface{}, error) {
args := new(BlockNumIndexArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
block := self.xeth.EthBlockByNumber(args.BlockNumber)
v := NewBlockRes(block, true)
if v == nil {
return nil, nil
}
if args.Index >= int64(len(v.Uncles)) || args.Index < 0 {
return nil, nil
} else {
return v.Uncles[args.Index], nil
}
}
func (self *ethApi) GetCompilers(req *shared.Request) (interface{}, error) {
var lang string
if solc, _ := self.xeth.Solc(); solc != nil {
lang = "Solidity"
}
c := []string{lang}
return c, nil
}
func (self *ethApi) CompileSolidity(req *shared.Request) (interface{}, error) {
solc, _ := self.xeth.Solc()
if solc == nil {
return nil, shared.NewNotAvailableError(req.Method, "solc (solidity compiler) not found")
}
args := new(SourceArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
contracts, err := solc.Compile(args.Source)
if err != nil {
return nil, err
}
return contracts, nil
}
func (self *ethApi) NewFilter(req *shared.Request) (interface{}, error) {
args := new(BlockFilterArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
id := self.xeth.NewLogFilter(args.Earliest, args.Latest, args.Skip, args.Max, args.Address, args.Topics)
return newHexNum(big.NewInt(int64(id)).Bytes()), nil
}
func (self *ethApi) NewBlockFilter(req *shared.Request) (interface{}, error) {
return newHexNum(self.xeth.NewBlockFilter()), nil
}
func (self *ethApi) NewPendingTransactionFilter(req *shared.Request) (interface{}, error) {
return newHexNum(self.xeth.NewTransactionFilter()), nil
}
func (self *ethApi) UninstallFilter(req *shared.Request) (interface{}, error) {
args := new(FilterIdArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
return self.xeth.UninstallFilter(args.Id), nil
}
func (self *ethApi) GetFilterChanges(req *shared.Request) (interface{}, error) {
args := new(FilterIdArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
switch self.xeth.GetFilterType(args.Id) {
case xeth.BlockFilterTy:
return NewHashesRes(self.xeth.BlockFilterChanged(args.Id)), nil
case xeth.TransactionFilterTy:
return NewHashesRes(self.xeth.TransactionFilterChanged(args.Id)), nil
case xeth.LogFilterTy:
return NewLogsRes(self.xeth.LogFilterChanged(args.Id)), nil
default:
return []string{}, nil // reply empty string slice
}
}
func (self *ethApi) GetFilterLogs(req *shared.Request) (interface{}, error) {
args := new(FilterIdArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
return NewLogsRes(self.xeth.Logs(args.Id)), nil
}
func (self *ethApi) GetLogs(req *shared.Request) (interface{}, error) {
args := new(BlockFilterArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
return NewLogsRes(self.xeth.AllLogs(args.Earliest, args.Latest, args.Skip, args.Max, args.Address, args.Topics)), nil
}
func (self *ethApi) GetWork(req *shared.Request) (interface{}, error) {
self.xeth.SetMining(true, 0)
return self.xeth.RemoteMining().GetWork(), nil
}
func (self *ethApi) SubmitWork(req *shared.Request) (interface{}, error) {
args := new(SubmitWorkArgs)
if err := self.codec.Decode(req.Params, &args); err != nil {
return nil, shared.NewDecodeParamError(err.Error())
}
return self.xeth.RemoteMining().SubmitWork(args.Nonce, common.HexToHash(args.Digest), common.HexToHash(args.Header)), nil
}
func (self *ethApi) PendingTransactions(req *shared.Request) (interface{}, error) {
txs := self.ethereum.TxPool().GetTransactions()
// grab the accounts from the account manager. This will help with determening which
// transactions should be returned.
accounts, err := self.ethereum.AccountManager().Accounts()
if err != nil {
return nil, err
}
// Add the accouns to a new set
accountSet := set.New()
for _, account := range accounts {
accountSet.Add(account.Address)
}
var ltxs []*tx
for _, tx := range txs {
if from, _ := tx.From(); accountSet.Has(from) {
ltxs = append(ltxs, newTx(tx))
}
}
return ltxs, nil
}