package api import ( "bytes" "encoding/json" "math/big" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/rpc/codec" "github.com/ethereum/go-ethereum/rpc/shared" "github.com/ethereum/go-ethereum/xeth" ) const ( EthApiVersion = "1.0" ) // eth api provider // See https://github.com/ethereum/wiki/wiki/JSON-RPC type ethApi struct { xeth *xeth.XEth 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).PushTx, "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_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, } ) // create new ethApi instance func NewEthApi(xeth *xeth.XEth, codec codec.Codec) *ethApi { return ðApi{xeth, 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 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) { return self.xeth.CurrentBlock().Number(), 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(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) PushTx(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.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() } v, err := self.xeth.Transact(args.From, args.To, nonce, args.Value.String(), args.Gas.String(), args.GasPrice.String(), 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) // If request was for "pending", nil nonsensical fields if args.BlockNumber == -2 { br.BlockHash = nil br.BlockNumber = nil br.Miner = nil br.Nonce = nil br.LogsBloom = nil } 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 }