package rpc import ( "encoding/json" "math/big" "path" "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" ) type EthereumApi struct { eth *xeth.XEth xethMu sync.RWMutex 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) xethAtStateNum(num int64) *xeth.XEth { return self.xeth().AtStateNum(num) } func (p *EthereumApi) GetRequestReply(req *RpcRequest, reply *interface{}) error { // Spec at https://github.com/ethereum/wiki/wiki/Generic-JSON-RPC rpclogger.Debugf("%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": v := p.xeth().PeerCount() *reply = common.ToHex(big.NewInt(int64(v)).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": v := p.xeth().DefaultGas() *reply = common.ToHex(v.Bytes()) case "eth_accounts": *reply = p.xeth().Accounts() case "eth_blockNumber": v := p.xeth().Backend().ChainManager().CurrentBlock().Number() *reply = common.ToHex(v.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 } v := p.xethAtStateNum(args.BlockNumber).State().SafeGet(args.Address).Balance() *reply = common.ToHex(v.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.xethAtStateNum(args.BlockNumber).State().SafeGet(args.Address).Storage() case "eth_getStorageAt": args := new(GetStorageAtArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } if err := args.requirements(); err != nil { return err } state := p.xethAtStateNum(args.BlockNumber).State().SafeGet(args.Address) value := state.StorageString(args.Key) *reply = common.Bytes2Hex(value.Bytes()) 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.xethAtStateNum(args.BlockNumber).TxCountAt(args.Address) case "eth_getBlockTransactionCountByHash": args := new(GetBlockByHashArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } block := NewBlockRes(p.xeth().EthBlockByHash(args.BlockHash)) *reply = common.ToHex(big.NewInt(int64(len(block.Transactions))).Bytes()) case "eth_getBlockTransactionCountByNumber": args := new(GetBlockByNumberArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } block := NewBlockRes(p.xeth().EthBlockByNumber(args.BlockNumber)) *reply = common.ToHex(big.NewInt(int64(len(block.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.xethAtStateNum(args.BlockNumber).CodeAt(args.Address) case "eth_sendTransaction", "eth_transact": args := new(NewTxArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } if err := args.requirements(); err != nil { return err } v, err := p.xeth().Transact(args.From, args.To, args.Value.String(), args.Gas.String(), args.GasPrice.String(), args.Data) if err != nil { return err } *reply = v case "eth_call": args := new(NewTxArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } v, err := p.xethAtStateNum(args.BlockNumber).Call(args.From, args.To, args.Value.String(), args.Gas.String(), args.GasPrice.String(), args.Data) if err != nil { return err } *reply = v case "eth_flush": return NewNotImplementedError(req.Method) case "eth_getBlockByHash": args := new(GetBlockByHashArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } block := p.xeth().EthBlockByHash(args.BlockHash) br := NewBlockRes(block) br.fullTx = args.IncludeTxs *reply = br case "eth_getBlockByNumber": args := new(GetBlockByNumberArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } block := p.xeth().EthBlockByNumber(args.BlockNumber) br := NewBlockRes(block) br.fullTx = args.IncludeTxs *reply = br 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 } block := p.xeth().EthBlockByHash(args.Hash) br := NewBlockRes(block) br.fullTx = true if args.Index > int64(len(br.Transactions)) || args.Index < 0 { return NewValidationError("Index", "does not exist") } *reply = br.Transactions[args.Index] case "eth_getTransactionByBlockNumberAndIndex": args := new(BlockNumIndexArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } block := p.xeth().EthBlockByNumber(args.BlockNumber) v := NewBlockRes(block) v.fullTx = true 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 } br := NewBlockRes(p.xeth().EthBlockByHash(args.Hash)) if args.Index > int64(len(br.Uncles)) || args.Index < 0 { return NewValidationError("Index", "does not exist") } uhash := common.ToHex(br.Uncles[args.Index]) uncle := NewBlockRes(p.xeth().EthBlockByHash(uhash)) *reply = uncle case "eth_getUncleByBlockNumberAndIndex": args := new(BlockNumIndexArgs) if err := json.Unmarshal(req.Params, &args); err != nil { return err } block := p.xeth().EthBlockByNumber(args.BlockNumber) v := NewBlockRes(block) v.fullTx = true if args.Index > int64(len(v.Uncles)) || args.Index < 0 { return NewValidationError("Index", "does not exist") } uhash := common.ToHex(v.Uncles[args.Index]) uncle := NewBlockRes(p.xeth().EthBlockByHash(uhash)) *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": // // Placeholder for actual type // args := new(HashIndexArgs) // if err := json.Unmarshal(req.Params, &args); err != nil { // return err // } // *reply = p.xeth().Register(args.Hash) // case "eth_unregister": // args := new(HashIndexArgs) // if err := json.Unmarshal(req.Params, &args); err != nil { // return err // } // *reply = p.xeth().Unregister(args.Hash) // case "eth_watchTx": // args := new(HashIndexArgs) // if err := json.Unmarshal(req.Params, &args); err != nil { // return err // } // *reply = p.xeth().PullWatchTx(args.Hash) 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 }