package rpc import ( "encoding/json" "fmt" "math/big" "path" "strings" "sync" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/core" "github.com/ethereum/go-ethereum/crypto" "github.com/ethereum/go-ethereum/ethdb" "github.com/ethereum/go-ethereum/xeth" ) var ( defaultGasPrice = big.NewInt(150000000000) defaultGas = big.NewInt(500000) ) type EthereumApi struct { eth *xeth.XEth xethMu sync.RWMutex // // Register keeps a list of accounts and transaction data // regmut sync.Mutex // register map[string][]*NewTxArgs db common.Database } func NewEthereumApi(eth *xeth.XEth, dataDir string) *EthereumApi { // What about when dataDir is empty? db, _ := ethdb.NewLDBDatabase(path.Join(dataDir, "dapps")) api := &EthereumApi{ eth: eth, db: db, } return api } func (self *EthereumApi) xeth() *xeth.XEth { self.xethMu.RLock() defer self.xethMu.RUnlock() return self.eth } // func (self *EthereumApi) Register(args string, reply *interface{}) error { // self.regmut.Lock() // defer self.regmut.Unlock() // if _, ok := self.register[args]; ok { // self.register[args] = nil // register with empty // } // return nil // } // func (self *EthereumApi) Unregister(args string, reply *interface{}) error { // self.regmut.Lock() // defer self.regmut.Unlock() // delete(self.register, args) // return nil // } // func (self *EthereumApi) WatchTx(args string, reply *interface{}) error { // self.regmut.Lock() // defer self.regmut.Unlock() // txs := self.register[args] // self.register[args] = nil // *reply = txs // return nil // } func (p *EthereumApi) Transact(args *NewTxArgs, reply *interface{}) (err error) { // TODO if no_private_key then //if _, exists := p.register[args.From]; exists { // p.register[args.From] = append(p.register[args.From], args) //} else { /* account := accounts.Get(common.FromHex(args.From)) if account != nil { if account.Unlocked() { if !unlockAccount(account) { return } } result, _ := account.Transact(common.FromHex(args.To), common.FromHex(args.Value), common.FromHex(args.Gas), common.FromHex(args.GasPrice), common.FromHex(args.Data)) if len(result) > 0 { *reply = common.ToHex(result) } } else if _, exists := p.register[args.From]; exists { p.register[ags.From] = append(p.register[args.From], args) } */ if err := args.requirements(); err != nil { return err } // TODO: align default values to have the same type, e.g. not depend on // common.Value conversions later on if args.Gas.Cmp(big.NewInt(0)) == 0 { args.Gas = defaultGas } if args.GasPrice.Cmp(big.NewInt(0)) == 0 { args.GasPrice = defaultGasPrice } *reply, err = p.xeth().Transact(args.From, args.To, args.Value.String(), args.Gas.String(), args.GasPrice.String(), args.Data) if err != nil { fmt.Println("err:", err) return err } return nil } func (p *EthereumApi) Call(args *NewTxArgs, reply *interface{}) error { result, err := p.xeth().AtStateNum(args.BlockNumber).Call(args.From, args.To, args.Value.String(), args.Gas.String(), args.GasPrice.String(), args.Data) if err != nil { return err } *reply = result return nil } func (p *EthereumApi) GetStorageAt(args *GetStorageAtArgs, reply *interface{}) error { if err := args.requirements(); err != nil { return err } state := p.xeth().AtStateNum(args.BlockNumber).State().SafeGet(args.Address) value := state.StorageString(args.Key) var hx string if strings.Index(args.Key, "0x") == 0 { hx = string([]byte(args.Key)[2:]) } else { // Convert the incoming string (which is a bigint) into hex i, _ := new(big.Int).SetString(args.Key, 10) hx = common.Bytes2Hex(i.Bytes()) } rpclogger.Debugf("GetStateAt(%s, %s)\n", args.Address, hx) *reply = map[string]string{args.Key: value.Str()} return nil } func (p *EthereumApi) GetBlockByHash(blockhash string, includetx bool) (*BlockRes, error) { block := p.xeth().EthBlockByHash(blockhash) br := NewBlockRes(block) br.fullTx = includetx return br, nil } func (p *EthereumApi) GetBlockByNumber(blocknum int64, includetx bool) (*BlockRes, error) { block := p.xeth().EthBlockByNumber(blocknum) br := NewBlockRes(block) br.fullTx = includetx return br, nil } func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error { // Spec at https://github.com/ethereum/wiki/wiki/Generic-JSON-RPC rpclogger.Infof("%s %s", req.Method, req.Params) switch req.Method { case "web3_sha3": args := new(Sha3Args) if err := json.Unmarshal(req.Params, &args); err != nil { return err } *reply = common.ToHex(crypto.Sha3(common.FromHex(args.Data))) case "web3_clientVersion": *reply = p.xeth().Backend().Version() case "net_version": return NewNotImplementedError(req.Method) case "net_listening": *reply = p.xeth().IsListening() case "net_peerCount": *reply = common.ToHex(big.NewInt(int64(p.xeth().PeerCount())).Bytes()) case "eth_coinbase": // TODO handling of empty coinbase due to lack of accounts res := p.xeth().Coinbase() if res == "0x" || res == "0x0" { *reply = nil } else { *reply = res } case "eth_mining": *reply = p.xeth().IsMining() case "eth_gasPrice": *reply = common.ToHex(defaultGasPrice.Bytes()) case "eth_accounts": *reply = p.xeth().Accounts() case "eth_blockNumber": *reply = common.ToHex(p.xeth().Backend().ChainManager().CurrentBlock().Number().Bytes()) case "eth_getBalance": args := new(GetBalanceArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } if err := args.requirements(); err != nil { return err } *reply = common.ToHex(p.xeth().AtStateNum(args.BlockNumber).State().SafeGet(args.Address).Balance().Bytes()) case "eth_getStorage", "eth_storageAt": args := new(GetStorageArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } if err := args.requirements(); err != nil { return err } *reply = p.xeth().AtStateNum(args.BlockNumber).State().SafeGet(args.Address).Storage() case "eth_getStorageAt": args := new(GetStorageAtArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } return p.GetStorageAt(args, reply) case "eth_getTransactionCount": args := new(GetTxCountArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } err := args.requirements() if err != nil { return err } *reply = p.xeth().AtStateNum(args.BlockNumber).TxCountAt(args.Address) case "eth_getBlockTransactionCountByHash": args := new(GetBlockByHashArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } block := p.xeth().EthBlockByHash(args.BlockHash) br := NewBlockRes(block) *reply = common.ToHex(big.NewInt(int64(len(br.Transactions))).Bytes()) case "eth_getBlockTransactionCountByNumber": args := new(GetBlockByNumberArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } block := p.xeth().EthBlockByNumber(args.BlockNumber) br := NewBlockRes(block) *reply = common.ToHex(big.NewInt(int64(len(br.Transactions))).Bytes()) case "eth_getUncleCountByBlockHash": args := new(GetBlockByHashArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } block := p.xeth().EthBlockByHash(args.BlockHash) br := NewBlockRes(block) *reply = common.ToHex(big.NewInt(int64(len(br.Uncles))).Bytes()) case "eth_getUncleCountByBlockNumber": args := new(GetBlockByNumberArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } block := p.xeth().EthBlockByNumber(args.BlockNumber) br := NewBlockRes(block) *reply = common.ToHex(big.NewInt(int64(len(br.Uncles))).Bytes()) case "eth_getData", "eth_getCode": args := new(GetDataArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } if err := args.requirements(); err != nil { return err } *reply = p.xeth().AtStateNum(args.BlockNumber).CodeAt(args.Address) case "eth_sendTransaction", "eth_transact": args := new(NewTxArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } return p.Transact(args, reply) case "eth_call": args := new(NewTxArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } return p.Call(args, reply) case "eth_flush": return NewNotImplementedError(req.Method) case "eth_getBlockByHash": args := new(GetBlockByHashArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } v, err := p.GetBlockByHash(args.BlockHash, args.IncludeTxs) if err != nil { return err } *reply = v case "eth_getBlockByNumber": args := new(GetBlockByNumberArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } v, err := p.GetBlockByNumber(args.BlockNumber, args.IncludeTxs) if err != nil { return err } *reply = v case "eth_getTransactionByHash": // HashIndexArgs used, but only the "Hash" part we need. args := new(HashIndexArgs) if err := json.Unmarshal(req.Params, &args); err != nil { } tx := p.xeth().EthTransactionByHash(args.Hash) if tx != nil { *reply = NewTransactionRes(tx) } case "eth_getTransactionByBlockHashAndIndex": args := new(HashIndexArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } v, err := p.GetBlockByHash(args.Hash, true) if err != nil { return err } if args.Index > int64(len(v.Transactions)) || args.Index < 0 { return NewValidationError("Index", "does not exist") } *reply = v.Transactions[args.Index] case "eth_getTransactionByBlockNumberAndIndex": args := new(BlockNumIndexArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } v, err := p.GetBlockByNumber(args.BlockNumber, true) if err != nil { return err } if args.Index > int64(len(v.Transactions)) || args.Index < 0 { return NewValidationError("Index", "does not exist") } *reply = v.Transactions[args.Index] case "eth_getUncleByBlockHashAndIndex": args := new(HashIndexArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } v, err := p.GetBlockByHash(args.Hash, false) if err != nil { return err } if args.Index > int64(len(v.Uncles)) || args.Index < 0 { return NewValidationError("Index", "does not exist") } uncle, err := p.GetBlockByHash(common.ToHex(v.Uncles[args.Index]), false) if err != nil { return err } *reply = uncle case "eth_getUncleByBlockNumberAndIndex": args := new(BlockNumIndexArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } v, err := p.GetBlockByNumber(args.BlockNumber, true) if err != nil { return err } if args.Index > int64(len(v.Uncles)) || args.Index < 0 { return NewValidationError("Index", "does not exist") } uncle, err := p.GetBlockByHash(common.ToHex(v.Uncles[args.Index]), false) if err != nil { return err } *reply = uncle case "eth_getCompilers": c := []string{""} *reply = c case "eth_compileSolidity", "eth_compileLLL", "eth_compileSerpent": return NewNotImplementedError(req.Method) case "eth_newFilter": args := new(BlockFilterArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } opts := toFilterOptions(args) id := p.xeth().RegisterFilter(opts) *reply = common.ToHex(big.NewInt(int64(id)).Bytes()) case "eth_newBlockFilter": args := new(FilterStringArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } if err := args.requirements(); err != nil { return err } id := p.xeth().NewFilterString(args.Word) *reply = common.ToHex(big.NewInt(int64(id)).Bytes()) case "eth_uninstallFilter": args := new(FilterIdArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } *reply = p.xeth().UninstallFilter(args.Id) case "eth_getFilterChanges": args := new(FilterIdArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } *reply = NewLogsRes(p.xeth().FilterChanged(args.Id)) case "eth_getFilterLogs": args := new(FilterIdArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } *reply = NewLogsRes(p.xeth().Logs(args.Id)) case "eth_getLogs": args := new(BlockFilterArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } opts := toFilterOptions(args) *reply = NewLogsRes(p.xeth().AllLogs(opts)) case "eth_getWork", "eth_submitWork": return NewNotImplementedError(req.Method) case "db_putString": args := new(DbArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } if err := args.requirements(); err != nil { return err } p.db.Put([]byte(args.Database+args.Key), []byte(args.Value)) *reply = true case "db_getString": args := new(DbArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } if err := args.requirements(); err != nil { return err } res, _ := p.db.Get([]byte(args.Database + args.Key)) *reply = string(res) case "db_putHex", "db_getHex": return NewNotImplementedError(req.Method) case "shh_post": args := new(WhisperMessageArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } err := p.xeth().Whisper().Post(args.Payload, args.To, args.From, args.Topics, args.Priority, args.Ttl) if err != nil { return err } *reply = true case "shh_newIdentity": *reply = p.xeth().Whisper().NewIdentity() // case "shh_removeIdentity": // args := new(WhisperIdentityArgs) // if err := json.Unmarshal(req.Params, &args); err != nil { // return err // } // *reply = p.xeth().Whisper().RemoveIdentity(args.Identity) case "shh_hasIdentity": args := new(WhisperIdentityArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } *reply = p.xeth().Whisper().HasIdentity(args.Identity) case "shh_newGroup", "shh_addToGroup": return NewNotImplementedError(req.Method) case "shh_newFilter": args := new(WhisperFilterArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } opts := new(xeth.Options) opts.From = args.From opts.To = args.To opts.Topics = args.Topics id := p.xeth().NewWhisperFilter(opts) *reply = common.ToHex(big.NewInt(int64(id)).Bytes()) case "shh_uninstallFilter": args := new(FilterIdArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } *reply = p.xeth().UninstallWhisperFilter(args.Id) case "shh_getFilterChanges": args := new(FilterIdArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } *reply = p.xeth().MessagesChanged(args.Id) case "shh_getMessages": args := new(FilterIdArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } *reply = p.xeth().Whisper().Messages(args.Id) // case "eth_register": // args, err := req.ToRegisterArgs() // if err != nil { // return err // } // return p.Register(args, reply) // case "eth_unregister": // args, err := req.ToRegisterArgs() // if err != nil { // return err // } // return p.Unregister(args, reply) // case "eth_watchTx": // args, err := req.ToWatchTxArgs() // if err != nil { // return err // } // return p.WatchTx(args, reply) default: return NewNotImplementedError(req.Method) } rpclogger.DebugDetailf("Reply: %T %s", reply, reply) return nil } func toFilterOptions(options *BlockFilterArgs) *core.FilterOptions { var opts core.FilterOptions // Convert optional address slice/string to byte slice if str, ok := options.Address.(string); ok { opts.Address = [][]byte{common.FromHex(str)} } else if slice, ok := options.Address.([]interface{}); ok { bslice := make([][]byte, len(slice)) for i, addr := range slice { if saddr, ok := addr.(string); ok { bslice[i] = common.FromHex(saddr) } } opts.Address = bslice } opts.Earliest = options.Earliest opts.Latest = options.Latest topics := make([][][]byte, len(options.Topics)) for i, topicDat := range options.Topics { if slice, ok := topicDat.([]interface{}); ok { topics[i] = make([][]byte, len(slice)) for j, topic := range slice { topics[i][j] = common.FromHex(topic.(string)) } } else if str, ok := topicDat.(string); ok { topics[i] = make([][]byte, 1) topics[i][0] = common.FromHex(str) } } opts.Topics = topics return &opts }