package rpc import ( "bytes" "errors" "fmt" "math/big" "os" "sync" "github.com/spf13/viper" "github.com/cosmos/ethermint/crypto" params "github.com/cosmos/ethermint/rpc/args" ethermint "github.com/cosmos/ethermint/types" "github.com/cosmos/ethermint/utils" "github.com/cosmos/ethermint/version" evmtypes "github.com/cosmos/ethermint/x/evm/types" abci "github.com/tendermint/tendermint/abci/types" "github.com/tendermint/tendermint/crypto/merkle" tmbytes "github.com/tendermint/tendermint/libs/bytes" "github.com/tendermint/tendermint/libs/log" "github.com/tendermint/tendermint/rpc/client" tmtypes "github.com/tendermint/tendermint/types" "github.com/ethereum/go-ethereum/accounts/keystore" "github.com/ethereum/go-ethereum/common" "github.com/ethereum/go-ethereum/common/hexutil" ethtypes "github.com/ethereum/go-ethereum/core/types" "github.com/ethereum/go-ethereum/rlp" "github.com/cosmos/cosmos-sdk/client/context" "github.com/cosmos/cosmos-sdk/client/flags" "github.com/cosmos/cosmos-sdk/crypto/keys" sdk "github.com/cosmos/cosmos-sdk/types" sdkerrors "github.com/cosmos/cosmos-sdk/types/errors" "github.com/cosmos/cosmos-sdk/x/auth" authclient "github.com/cosmos/cosmos-sdk/x/auth/client/utils" authtypes "github.com/cosmos/cosmos-sdk/x/auth/types" ) // PublicEthAPI is the eth_ prefixed set of APIs in the Web3 JSON-RPC spec. type PublicEthAPI struct { cliCtx context.CLIContext chainIDEpoch *big.Int logger log.Logger backend Backend keys []crypto.PrivKeySecp256k1 // unlocked keys nonceLock *AddrLocker keybaseLock sync.Mutex } // NewPublicEthAPI creates an instance of the public ETH Web3 API. func NewPublicEthAPI(cliCtx context.CLIContext, backend Backend, nonceLock *AddrLocker, key []crypto.PrivKeySecp256k1) *PublicEthAPI { epoch, err := ethermint.ParseChainID(cliCtx.ChainID) if err != nil { panic(err) } api := &PublicEthAPI{ cliCtx: cliCtx, chainIDEpoch: epoch, logger: log.NewTMLogger(log.NewSyncWriter(os.Stdout)).With("module", "json-rpc"), backend: backend, keys: key, nonceLock: nonceLock, } if err := api.getKeybaseInfo(); err != nil { api.logger.Error("failed to get keybase info", "error", err) } return api } func (e *PublicEthAPI) getKeybaseInfo() error { e.keybaseLock.Lock() defer e.keybaseLock.Unlock() if e.cliCtx.Keybase == nil { keybase, err := keys.NewKeyring( sdk.KeyringServiceName(), viper.GetString(flags.FlagKeyringBackend), viper.GetString(flags.FlagHome), e.cliCtx.Input, crypto.EthSecp256k1Options()..., ) if err != nil { return err } e.cliCtx.Keybase = keybase } return nil } // ProtocolVersion returns the supported Ethereum protocol version. func (e *PublicEthAPI) ProtocolVersion() hexutil.Uint { e.logger.Debug("eth_protocolVersion") return hexutil.Uint(version.ProtocolVersion) } // ChainId returns the chain's identifier in hex format func (e *PublicEthAPI) ChainId() (hexutil.Uint, error) { // nolint e.logger.Debug("eth_chainId") return hexutil.Uint(uint(e.chainIDEpoch.Uint64())), nil } // Syncing returns whether or not the current node is syncing with other peers. Returns false if not, or a struct // outlining the state of the sync if it is. func (e *PublicEthAPI) Syncing() (interface{}, error) { e.logger.Debug("eth_syncing") status, err := e.cliCtx.Client.Status() if err != nil { return false, err } if !status.SyncInfo.CatchingUp { return false, nil } return map[string]interface{}{ // "startingBlock": nil, // NA "currentBlock": hexutil.Uint64(status.SyncInfo.LatestBlockHeight), // "highestBlock": nil, // NA // "pulledStates": nil, // NA // "knownStates": nil, // NA }, nil } // Coinbase is the address that staking rewards will be send to (alias for Etherbase). func (e *PublicEthAPI) Coinbase() (common.Address, error) { e.logger.Debug("eth_coinbase") node, err := e.cliCtx.GetNode() if err != nil { return common.Address{}, err } status, err := node.Status() if err != nil { return common.Address{}, err } return common.BytesToAddress(status.ValidatorInfo.Address.Bytes()), nil } // Mining returns whether or not this node is currently mining. Always false. func (e *PublicEthAPI) Mining() bool { e.logger.Debug("eth_mining") return false } // Hashrate returns the current node's hashrate. Always 0. func (e *PublicEthAPI) Hashrate() hexutil.Uint64 { e.logger.Debug("eth_hashrate") return 0 } // GasPrice returns the current gas price based on Ethermint's gas price oracle. func (e *PublicEthAPI) GasPrice() *hexutil.Big { e.logger.Debug("eth_gasPrice") out := big.NewInt(0) return (*hexutil.Big)(out) } // Accounts returns the list of accounts available to this node. func (e *PublicEthAPI) Accounts() ([]common.Address, error) { e.logger.Debug("eth_accounts") e.keybaseLock.Lock() addresses := make([]common.Address, 0) // return [] instead of nil if empty keybase, err := keys.NewKeyring( sdk.KeyringServiceName(), viper.GetString(flags.FlagKeyringBackend), viper.GetString(flags.FlagHome), e.cliCtx.Input, crypto.EthSecp256k1Options()..., ) if err != nil { return addresses, err } infos, err := keybase.List() if err != nil { return addresses, err } e.keybaseLock.Unlock() for _, info := range infos { addressBytes := info.GetPubKey().Address().Bytes() addresses = append(addresses, common.BytesToAddress(addressBytes)) } return addresses, nil } // BlockNumber returns the current block number. func (e *PublicEthAPI) BlockNumber() (hexutil.Uint64, error) { e.logger.Debug("eth_blockNumber") return e.backend.BlockNumber() } // GetBalance returns the provided account's balance up to the provided block number. func (e *PublicEthAPI) GetBalance(address common.Address, blockNum BlockNumber) (*hexutil.Big, error) { e.logger.Debug("eth_getBalance", "address", address, "block number", blockNum) ctx := e.cliCtx.WithHeight(blockNum.Int64()) res, _, err := ctx.QueryWithData(fmt.Sprintf("custom/%s/balance/%s", evmtypes.ModuleName, address.Hex()), nil) if err != nil { return nil, err } var out evmtypes.QueryResBalance e.cliCtx.Codec.MustUnmarshalJSON(res, &out) val, err := utils.UnmarshalBigInt(out.Balance) if err != nil { return nil, err } return (*hexutil.Big)(val), nil } // GetStorageAt returns the contract storage at the given address, block number, and key. func (e *PublicEthAPI) GetStorageAt(address common.Address, key string, blockNum BlockNumber) (hexutil.Bytes, error) { e.logger.Debug("eth_getStorageAt", "address", address, "key", key, "block number", blockNum) ctx := e.cliCtx.WithHeight(blockNum.Int64()) res, _, err := ctx.QueryWithData(fmt.Sprintf("custom/%s/storage/%s/%s", evmtypes.ModuleName, address.Hex(), key), nil) if err != nil { return nil, err } var out evmtypes.QueryResStorage e.cliCtx.Codec.MustUnmarshalJSON(res, &out) return out.Value, nil } // GetTransactionCount returns the number of transactions at the given address up to the given block number. func (e *PublicEthAPI) GetTransactionCount(address common.Address, blockNum BlockNumber) (*hexutil.Uint64, error) { e.logger.Debug("eth_getTransactionCount", "address", address, "block number", blockNum) ctx := e.cliCtx.WithHeight(blockNum.Int64()) // Get nonce (sequence) from account from := sdk.AccAddress(address.Bytes()) accRet := authtypes.NewAccountRetriever(ctx) err := accRet.EnsureExists(from) if err != nil { // account doesn't exist yet, return 0 n := hexutil.Uint64(0) return &n, nil } _, nonce, err := accRet.GetAccountNumberSequence(from) if err != nil { return nil, err } n := hexutil.Uint64(nonce) return &n, nil } // GetBlockTransactionCountByHash returns the number of transactions in the block identified by hash. func (e *PublicEthAPI) GetBlockTransactionCountByHash(hash common.Hash) *hexutil.Uint { e.logger.Debug("eth_getBlockTransactionCountByHash", "hash", hash) res, _, err := e.cliCtx.Query(fmt.Sprintf("custom/%s/%s/%s", evmtypes.ModuleName, evmtypes.QueryHashToHeight, hash.Hex())) if err != nil { // Return nil if block does not exist return nil } var out evmtypes.QueryResBlockNumber e.cliCtx.Codec.MustUnmarshalJSON(res, &out) return e.getBlockTransactionCountByNumber(out.Number) } // GetBlockTransactionCountByNumber returns the number of transactions in the block identified by number. func (e *PublicEthAPI) GetBlockTransactionCountByNumber(blockNum BlockNumber) *hexutil.Uint { e.logger.Debug("eth_getBlockTransactionCountByNumber", "block number", blockNum) height := blockNum.Int64() return e.getBlockTransactionCountByNumber(height) } func (e *PublicEthAPI) getBlockTransactionCountByNumber(number int64) *hexutil.Uint { block, err := e.cliCtx.Client.Block(&number) if err != nil { // Return nil if block doesn't exist return nil } n := hexutil.Uint(len(block.Block.Txs)) return &n } // GetUncleCountByBlockHash returns the number of uncles in the block idenfied by hash. Always zero. func (e *PublicEthAPI) GetUncleCountByBlockHash(hash common.Hash) hexutil.Uint { return 0 } // GetUncleCountByBlockNumber returns the number of uncles in the block idenfied by number. Always zero. func (e *PublicEthAPI) GetUncleCountByBlockNumber(blockNum BlockNumber) hexutil.Uint { return 0 } // GetCode returns the contract code at the given address and block number. func (e *PublicEthAPI) GetCode(address common.Address, blockNumber BlockNumber) (hexutil.Bytes, error) { e.logger.Debug("eth_getCode", "address", address, "block number", blockNumber) ctx := e.cliCtx.WithHeight(blockNumber.Int64()) res, _, err := ctx.QueryWithData(fmt.Sprintf("custom/%s/%s/%s", evmtypes.ModuleName, evmtypes.QueryCode, address.Hex()), nil) if err != nil { return nil, err } var out evmtypes.QueryResCode e.cliCtx.Codec.MustUnmarshalJSON(res, &out) return out.Code, nil } // GetTransactionLogs returns the logs given a transaction hash. func (e *PublicEthAPI) GetTransactionLogs(txHash common.Hash) ([]*ethtypes.Log, error) { e.logger.Debug("eth_getTransactionLogs", "hash", txHash) return e.backend.GetTransactionLogs(txHash) } // ExportAccount exports an account's balance, code, and storage at the given block number // TODO: deprecate this once the export genesis command works func (e *PublicEthAPI) ExportAccount(address common.Address, blockNumber BlockNumber) (string, error) { e.logger.Debug("eth_exportAccount", "address", address, "block number", blockNumber) ctx := e.cliCtx.WithHeight(blockNumber.Int64()) res, _, err := ctx.QueryWithData(fmt.Sprintf("custom/%s/%s/%s", evmtypes.ModuleName, evmtypes.QueryExportAccount, address.Hex()), nil) if err != nil { return "", err } return string(res), nil } func checkKeyInKeyring(keys []crypto.PrivKeySecp256k1, address common.Address) (key crypto.PrivKeySecp256k1, exist bool) { if len(keys) > 0 { for _, key := range keys { if bytes.Equal(key.PubKey().Address().Bytes(), address.Bytes()) { return key, true } } } return nil, false } // Sign signs the provided data using the private key of address via Geth's signature standard. func (e *PublicEthAPI) Sign(address common.Address, data hexutil.Bytes) (hexutil.Bytes, error) { e.logger.Debug("eth_sign", "address", address, "data", data) // TODO: Change this functionality to find an unlocked account by address key, exist := checkKeyInKeyring(e.keys, address) if !exist { return nil, keystore.ErrLocked } // Sign the requested hash with the wallet signature, err := key.Sign(data) if err == nil { signature[64] += 27 // Transform V from 0/1 to 27/28 according to the yellow paper } return signature, err } // SendTransaction sends an Ethereum transaction. func (e *PublicEthAPI) SendTransaction(args params.SendTxArgs) (common.Hash, error) { e.logger.Debug("eth_sendTransaction", "args", args) // TODO: Change this functionality to find an unlocked account by address for _, key := range e.keys { e.logger.Debug("eth_sendTransaction", "key", fmt.Sprintf("0x%x", key.PubKey().Address().Bytes())) } key, exist := checkKeyInKeyring(e.keys, args.From) if !exist { e.logger.Debug("failed to find key in keyring", "key", args.From) return common.Hash{}, keystore.ErrLocked } // Mutex lock the address' nonce to avoid assigning it to multiple requests if args.Nonce == nil { e.nonceLock.LockAddr(args.From) defer e.nonceLock.UnlockAddr(args.From) } // Assemble transaction from fields tx, err := e.generateFromArgs(args) if err != nil { e.logger.Debug("failed to generate tx", "error", err) return common.Hash{}, err } // ChainID must be set as flag to send transaction chainID := viper.GetString(flags.FlagChainID) // parse the chainID from a string to a base-10 integer chainIDEpoch, err := ethermint.ParseChainID(chainID) if err != nil { return common.Hash{}, err } // Sign transaction if err := tx.Sign(chainIDEpoch, key.ToECDSA()); err != nil { e.logger.Debug("failed to sign tx", "error", err) return common.Hash{}, err } // Encode transaction by default Tx encoder txEncoder := authclient.GetTxEncoder(e.cliCtx.Codec) txBytes, err := txEncoder(tx) if err != nil { return common.Hash{}, err } // Broadcast transaction in sync mode (default) res, err := e.cliCtx.BroadcastTx(txBytes) // If error is encountered on the node, the broadcast will not return an error if err != nil { return common.Hash{}, err } // Return transaction hash return common.HexToHash(res.TxHash), nil } // SendRawTransaction send a raw Ethereum transaction. func (e *PublicEthAPI) SendRawTransaction(data hexutil.Bytes) (common.Hash, error) { e.logger.Debug("eth_sendRawTransaction", "data", data) tx := new(evmtypes.MsgEthereumTx) // RLP decode raw transaction bytes if err := rlp.DecodeBytes(data, tx); err != nil { // Return nil is for when gasLimit overflows uint64 return common.Hash{}, nil } // Encode transaction by default Tx encoder txEncoder := authclient.GetTxEncoder(e.cliCtx.Codec) txBytes, err := txEncoder(tx) if err != nil { return common.Hash{}, err } // TODO: Possibly log the contract creation address (if recipient address is nil) or tx data // If error is encountered on the node, the broadcast will not return an error res, err := e.cliCtx.BroadcastTx(txBytes) if err != nil { return common.Hash{}, err } // Return transaction hash return common.HexToHash(res.TxHash), nil } // CallArgs represents the arguments for a call. type CallArgs struct { From *common.Address `json:"from"` To *common.Address `json:"to"` Gas *hexutil.Uint64 `json:"gas"` GasPrice *hexutil.Big `json:"gasPrice"` Value *hexutil.Big `json:"value"` Data *hexutil.Bytes `json:"data"` } // Call performs a raw contract call. func (e *PublicEthAPI) Call(args CallArgs, blockNr BlockNumber, _ *map[common.Address]account) (hexutil.Bytes, error) { e.logger.Debug("eth_call", "args", args, "block number", blockNr) simRes, err := e.doCall(args, blockNr, big.NewInt(ethermint.DefaultRPCGasLimit)) if err != nil { return []byte{}, err } data, err := evmtypes.DecodeResultData(simRes.Result.Data) if err != nil { return []byte{}, err } return (hexutil.Bytes)(data.Ret), nil } // account indicates the overriding fields of account during the execution of // a message call. // Note, state and stateDiff can't be specified at the same time. If state is // set, message execution will only use the data in the given state. Otherwise // if statDiff is set, all diff will be applied first and then execute the call // message. type account struct { Nonce *hexutil.Uint64 `json:"nonce"` Code *hexutil.Bytes `json:"code"` Balance **hexutil.Big `json:"balance"` State *map[common.Hash]common.Hash `json:"state"` StateDiff *map[common.Hash]common.Hash `json:"stateDiff"` } // DoCall performs a simulated call operation through the evmtypes. It returns the // estimated gas used on the operation or an error if fails. func (e *PublicEthAPI) doCall( args CallArgs, blockNr BlockNumber, globalGasCap *big.Int, ) (*sdk.SimulationResponse, error) { // Set height for historical queries ctx := e.cliCtx if blockNr.Int64() != 0 { ctx = e.cliCtx.WithHeight(blockNr.Int64()) } // Set sender address or use a default if none specified var addr common.Address if args.From == nil { addrs, err := e.Accounts() if err == nil && len(addrs) > 0 { addr = addrs[0] } } else { addr = *args.From } // Set default gas & gas price if none were set // Change this to uint64(math.MaxUint64 / 2) if gas cap can be configured gas := uint64(ethermint.DefaultRPCGasLimit) if args.Gas != nil { gas = uint64(*args.Gas) } if globalGasCap != nil && globalGasCap.Uint64() < gas { e.logger.Debug("Caller gas above allowance, capping", "requested", gas, "cap", globalGasCap) gas = globalGasCap.Uint64() } // Set gas price using default or parameter if passed in gasPrice := new(big.Int).SetUint64(ethermint.DefaultGasPrice) if args.GasPrice != nil { gasPrice = args.GasPrice.ToInt() } // Set value for transaction value := new(big.Int) if args.Value != nil { value = args.Value.ToInt() } // Set Data if provided var data []byte if args.Data != nil { data = []byte(*args.Data) } // Set destination address for call var toAddr sdk.AccAddress if args.To != nil { toAddr = sdk.AccAddress(args.To.Bytes()) } // Create new call message msg := evmtypes.NewMsgEthermint(0, &toAddr, sdk.NewIntFromBigInt(value), gas, sdk.NewIntFromBigInt(gasPrice), data, sdk.AccAddress(addr.Bytes())) if err := msg.ValidateBasic(); err != nil { return nil, err } // Generate tx to be used to simulate (signature isn't needed) var stdSig authtypes.StdSignature tx := authtypes.NewStdTx([]sdk.Msg{msg}, authtypes.StdFee{}, []authtypes.StdSignature{stdSig}, "") txEncoder := authclient.GetTxEncoder(ctx.Codec) txBytes, err := txEncoder(tx) if err != nil { return nil, err } // Transaction simulation through query res, _, err := ctx.QueryWithData("app/simulate", txBytes) if err != nil { return nil, err } var simResponse sdk.SimulationResponse if err := ctx.Codec.UnmarshalBinaryBare(res, &simResponse); err != nil { return nil, err } return &simResponse, nil } // EstimateGas returns an estimate of gas usage for the given smart contract call. // It adds 1,000 gas to the returned value instead of using the gas adjustment // param from the SDK. func (e *PublicEthAPI) EstimateGas(args CallArgs) (hexutil.Uint64, error) { e.logger.Debug("eth_estimateGas", "args", args) simResponse, err := e.doCall(args, 0, big.NewInt(ethermint.DefaultRPCGasLimit)) if err != nil { return 0, err } // TODO: change 1000 buffer for more accurate buffer (eg: SDK's gasAdjusted) estimatedGas := simResponse.GasInfo.GasUsed gas := estimatedGas + 1000 return hexutil.Uint64(gas), nil } // GetBlockByHash returns the block identified by hash. func (e *PublicEthAPI) GetBlockByHash(hash common.Hash, fullTx bool) (map[string]interface{}, error) { e.logger.Debug("eth_getBlockByHash", "hash", hash, "full", fullTx) return e.backend.GetBlockByHash(hash, fullTx) } // GetBlockByNumber returns the block identified by number. func (e *PublicEthAPI) GetBlockByNumber(blockNum BlockNumber, fullTx bool) (map[string]interface{}, error) { e.logger.Debug("eth_getBlockByNumber", "number", blockNum, "full", fullTx) return e.backend.GetBlockByNumber(blockNum, fullTx) } func formatBlock( header tmtypes.Header, size int, gasLimit int64, gasUsed *big.Int, transactions interface{}, bloom ethtypes.Bloom, ) map[string]interface{} { if bytes.Equal(header.DataHash, []byte{}) { header.DataHash = tmbytes.HexBytes(common.Hash{}.Bytes()) } return map[string]interface{}{ "number": hexutil.Uint64(header.Height), "hash": hexutil.Bytes(header.Hash()), "parentHash": hexutil.Bytes(header.LastBlockID.Hash), "nonce": hexutil.Uint64(0), // PoW specific "sha3Uncles": common.Hash{}, // No uncles in Tendermint "logsBloom": bloom, "transactionsRoot": hexutil.Bytes(header.DataHash), "stateRoot": hexutil.Bytes(header.AppHash), "miner": common.Address{}, "mixHash": common.Hash{}, "difficulty": 0, "totalDifficulty": 0, "extraData": hexutil.Uint64(0), "size": hexutil.Uint64(size), "gasLimit": hexutil.Uint64(gasLimit), // Static gas limit "gasUsed": (*hexutil.Big)(gasUsed), "timestamp": hexutil.Uint64(header.Time.Unix()), "transactions": transactions.([]common.Hash), "uncles": []string{}, "receiptsRoot": common.Hash{}, } } func convertTransactionsToRPC(cliCtx context.CLIContext, txs []tmtypes.Tx, blockHash common.Hash, height uint64) ([]common.Hash, *big.Int, error) { transactions := make([]common.Hash, len(txs)) gasUsed := big.NewInt(0) for i, tx := range txs { ethTx, err := bytesToEthTx(cliCtx, tx) if err != nil { // continue to next transaction in case it's not a MsgEthereumTx continue } // TODO: Remove gas usage calculation if saving gasUsed per block gasUsed.Add(gasUsed, ethTx.Fee()) tx, err := newRPCTransaction(*ethTx, common.BytesToHash(tx.Hash()), blockHash, &height, uint64(i)) if err != nil { return nil, nil, err } transactions[i] = tx.Hash } return transactions, gasUsed, nil } // Transaction represents a transaction returned to RPC clients. type Transaction struct { BlockHash *common.Hash `json:"blockHash"` BlockNumber *hexutil.Big `json:"blockNumber"` From common.Address `json:"from"` Gas hexutil.Uint64 `json:"gas"` GasPrice *hexutil.Big `json:"gasPrice"` Hash common.Hash `json:"hash"` Input hexutil.Bytes `json:"input"` Nonce hexutil.Uint64 `json:"nonce"` To *common.Address `json:"to"` TransactionIndex *hexutil.Uint64 `json:"transactionIndex"` Value *hexutil.Big `json:"value"` V *hexutil.Big `json:"v"` R *hexutil.Big `json:"r"` S *hexutil.Big `json:"s"` } func bytesToEthTx(cliCtx context.CLIContext, bz []byte) (*evmtypes.MsgEthereumTx, error) { var stdTx sdk.Tx // TODO: switch to UnmarshalBinaryBare on SDK v0.40.0 err := cliCtx.Codec.UnmarshalBinaryLengthPrefixed(bz, &stdTx) if err != nil { return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error()) } ethTx, ok := stdTx.(evmtypes.MsgEthereumTx) if !ok { return nil, fmt.Errorf("invalid transaction type %T, expected MsgEthereumTx", stdTx) } return ðTx, nil } // newRPCTransaction returns a transaction that will serialize to the RPC // representation, with the given location metadata set (if available). func newRPCTransaction(tx evmtypes.MsgEthereumTx, txHash, blockHash common.Hash, blockNumber *uint64, index uint64) (*Transaction, error) { // Verify signature and retrieve sender address from, err := tx.VerifySig(tx.ChainID()) if err != nil { return nil, err } result := Transaction{ From: from, Gas: hexutil.Uint64(tx.Data.GasLimit), GasPrice: (*hexutil.Big)(tx.Data.Price), Hash: txHash, Input: hexutil.Bytes(tx.Data.Payload), Nonce: hexutil.Uint64(tx.Data.AccountNonce), To: tx.To(), Value: (*hexutil.Big)(tx.Data.Amount), V: (*hexutil.Big)(tx.Data.V), R: (*hexutil.Big)(tx.Data.R), S: (*hexutil.Big)(tx.Data.S), } if blockHash != (common.Hash{}) { result.BlockHash = &blockHash result.BlockNumber = (*hexutil.Big)(new(big.Int).SetUint64(*blockNumber)) result.TransactionIndex = (*hexutil.Uint64)(&index) } return &result, nil } // GetTransactionByHash returns the transaction identified by hash. func (e *PublicEthAPI) GetTransactionByHash(hash common.Hash) (*Transaction, error) { e.logger.Debug("eth_getTransactionByHash", "hash", hash) tx, err := e.cliCtx.Client.Tx(hash.Bytes(), false) if err != nil { // Return nil for transaction when not found return nil, nil } // Can either cache or just leave this out if not necessary block, err := e.cliCtx.Client.Block(&tx.Height) if err != nil { return nil, err } blockHash := common.BytesToHash(block.Block.Header.Hash()) ethTx, err := bytesToEthTx(e.cliCtx, tx.Tx) if err != nil { return nil, err } height := uint64(tx.Height) return newRPCTransaction(*ethTx, common.BytesToHash(tx.Tx.Hash()), blockHash, &height, uint64(tx.Index)) } // GetTransactionByBlockHashAndIndex returns the transaction identified by hash and index. func (e *PublicEthAPI) GetTransactionByBlockHashAndIndex(hash common.Hash, idx hexutil.Uint) (*Transaction, error) { e.logger.Debug("eth_getTransactionByHashAndIndex", "hash", hash, "index", idx) res, _, err := e.cliCtx.Query(fmt.Sprintf("custom/%s/%s/%s", evmtypes.ModuleName, evmtypes.QueryHashToHeight, hash.Hex())) if err != nil { return nil, err } var out evmtypes.QueryResBlockNumber e.cliCtx.Codec.MustUnmarshalJSON(res, &out) return e.getTransactionByBlockNumberAndIndex(out.Number, idx) } // GetTransactionByBlockNumberAndIndex returns the transaction identified by number and index. func (e *PublicEthAPI) GetTransactionByBlockNumberAndIndex(blockNum BlockNumber, idx hexutil.Uint) (*Transaction, error) { e.logger.Debug("eth_getTransactionByBlockNumberAndIndex", "number", blockNum, "index", idx) value := blockNum.Int64() return e.getTransactionByBlockNumberAndIndex(value, idx) } func (e *PublicEthAPI) getTransactionByBlockNumberAndIndex(number int64, idx hexutil.Uint) (*Transaction, error) { block, err := e.cliCtx.Client.Block(&number) if err != nil { return nil, err } header := block.Block.Header txs := block.Block.Txs if uint64(idx) >= uint64(len(txs)) { return nil, nil } ethTx, err := bytesToEthTx(e.cliCtx, txs[idx]) if err != nil { return nil, err } height := uint64(header.Height) return newRPCTransaction(*ethTx, common.BytesToHash(txs[idx].Hash()), common.BytesToHash(header.Hash()), &height, uint64(idx)) } // GetTransactionReceipt returns the transaction receipt identified by hash. func (e *PublicEthAPI) GetTransactionReceipt(hash common.Hash) (map[string]interface{}, error) { e.logger.Debug("eth_getTransactionReceipt", "hash", hash) tx, err := e.cliCtx.Client.Tx(hash.Bytes(), false) if err != nil { // Return nil for transaction when not found return nil, nil } // Query block for consensus hash block, err := e.cliCtx.Client.Block(&tx.Height) if err != nil { return nil, err } blockHash := common.BytesToHash(block.Block.Header.Hash()) // Convert tx bytes to eth transaction ethTx, err := bytesToEthTx(e.cliCtx, tx.Tx) if err != nil { return nil, err } from, err := ethTx.VerifySig(ethTx.ChainID()) if err != nil { return nil, err } // Set status codes based on tx result var status hexutil.Uint if tx.TxResult.IsOK() { status = hexutil.Uint(1) } else { status = hexutil.Uint(0) } txData := tx.TxResult.GetData() data, err := evmtypes.DecodeResultData(txData) if err != nil { status = 0 // transaction failed } if data.Logs == nil { data.Logs = []*ethtypes.Log{} } receipt := map[string]interface{}{ // Consensus fields: These fields are defined by the Yellow Paper "status": status, "cumulativeGasUsed": nil, // ignore until needed "logsBloom": data.Bloom, "logs": data.Logs, // Implementation fields: These fields are added by geth when processing a transaction. // They are stored in the chain database. "transactionHash": hash, "contractAddress": data.ContractAddress, "gasUsed": hexutil.Uint64(tx.TxResult.GasUsed), // Inclusion information: These fields provide information about the inclusion of the // transaction corresponding to this receipt. "blockHash": blockHash, "blockNumber": hexutil.Uint64(tx.Height), "transactionIndex": hexutil.Uint64(tx.Index), // sender and receiver (contract or EOA) addreses "from": from, "to": ethTx.To(), } return receipt, nil } // PendingTransactions returns the transactions that are in the transaction pool // and have a from address that is one of the accounts this node manages. func (e *PublicEthAPI) PendingTransactions() ([]*Transaction, error) { e.logger.Debug("eth_getPendingTransactions") return e.backend.PendingTransactions() } // GetUncleByBlockHashAndIndex returns the uncle identified by hash and index. Always returns nil. func (e *PublicEthAPI) GetUncleByBlockHashAndIndex(hash common.Hash, idx hexutil.Uint) map[string]interface{} { return nil } // GetUncleByBlockNumberAndIndex returns the uncle identified by number and index. Always returns nil. func (e *PublicEthAPI) GetUncleByBlockNumberAndIndex(number hexutil.Uint, idx hexutil.Uint) map[string]interface{} { return nil } // Copied the Account and StorageResult types since they are registered under an // internal pkg on geth. // AccountResult struct for account proof type AccountResult struct { Address common.Address `json:"address"` AccountProof []string `json:"accountProof"` Balance *hexutil.Big `json:"balance"` CodeHash common.Hash `json:"codeHash"` Nonce hexutil.Uint64 `json:"nonce"` StorageHash common.Hash `json:"storageHash"` StorageProof []StorageResult `json:"storageProof"` } // StorageResult defines the format for storage proof return type StorageResult struct { Key string `json:"key"` Value *hexutil.Big `json:"value"` Proof []string `json:"proof"` } // GetProof returns an account object with proof and any storage proofs func (e *PublicEthAPI) GetProof(address common.Address, storageKeys []string, block BlockNumber) (*AccountResult, error) { e.logger.Debug("eth_getProof", "address", address, "keys", storageKeys, "number", block) e.cliCtx = e.cliCtx.WithHeight(int64(block)) path := fmt.Sprintf("custom/%s/%s/%s", evmtypes.ModuleName, evmtypes.QueryAccount, address.Hex()) // query eth account at block height resBz, _, err := e.cliCtx.Query(path) if err != nil { return nil, err } var account evmtypes.QueryResAccount e.cliCtx.Codec.MustUnmarshalJSON(resBz, &account) storageProofs := make([]StorageResult, len(storageKeys)) opts := client.ABCIQueryOptions{Height: int64(block), Prove: true} for i, k := range storageKeys { // Get value for key vPath := fmt.Sprintf("custom/%s/%s/%s/%s", evmtypes.ModuleName, evmtypes.QueryStorage, address, k) vRes, err := e.cliCtx.Client.ABCIQueryWithOptions(vPath, nil, opts) if err != nil { return nil, err } var value evmtypes.QueryResStorage e.cliCtx.Codec.MustUnmarshalJSON(vRes.Response.GetValue(), &value) // check for proof proof := vRes.Response.GetProof() proofStr := new(merkle.Proof).String() if proof != nil { proofStr = proof.String() } storageProofs[i] = StorageResult{ Key: k, Value: (*hexutil.Big)(common.BytesToHash(value.Value).Big()), Proof: []string{proofStr}, } } req := abci.RequestQuery{ Path: fmt.Sprintf("store/%s/key", auth.StoreKey), Data: auth.AddressStoreKey(sdk.AccAddress(address.Bytes())), Height: int64(block), Prove: true, } res, err := e.cliCtx.QueryABCI(req) if err != nil { return nil, err } // check for proof accountProof := res.GetProof() accProofStr := new(merkle.Proof).String() if accountProof != nil { accProofStr = accountProof.String() } return &AccountResult{ Address: address, AccountProof: []string{accProofStr}, Balance: (*hexutil.Big)(utils.MustUnmarshalBigInt(account.Balance)), CodeHash: common.BytesToHash(account.CodeHash), Nonce: hexutil.Uint64(account.Nonce), StorageHash: common.Hash{}, // Ethermint doesn't have a storage hash StorageProof: storageProofs, }, nil } // generateFromArgs populates tx message with args (used in RPC API) func (e *PublicEthAPI) generateFromArgs(args params.SendTxArgs) (*evmtypes.MsgEthereumTx, error) { var ( nonce uint64 gasLimit uint64 err error ) amount := (*big.Int)(args.Value) gasPrice := (*big.Int)(args.GasPrice) if args.GasPrice == nil { // Set default gas price // TODO: Change to min gas price from context once available through server/daemon gasPrice = big.NewInt(ethermint.DefaultGasPrice) } if args.Nonce == nil { // Get nonce (sequence) from account from := sdk.AccAddress(args.From.Bytes()) accRet := authtypes.NewAccountRetriever(e.cliCtx) if e.cliCtx.Keybase == nil { return nil, fmt.Errorf("cliCtx.Keybase is nil") } err = accRet.EnsureExists(from) if err != nil { // account doesn't exist return nil, fmt.Errorf("nonexistent account %s: %s", args.From.Hex(), err) } _, nonce, err = accRet.GetAccountNumberSequence(from) if err != nil { return nil, err } } else { nonce = (uint64)(*args.Nonce) } if args.Data != nil && args.Input != nil && !bytes.Equal(*args.Data, *args.Input) { return nil, errors.New(`both "data" and "input" are set and not equal. Please use "input" to pass transaction call data`) } // Sets input to either Input or Data, if both are set and not equal error above returns var input []byte if args.Input != nil { input = *args.Input } else if args.Data != nil { input = *args.Data } if args.To == nil && len(input) == 0 { // Contract creation return nil, fmt.Errorf("contract creation without any data provided") } if args.Gas == nil { callArgs := CallArgs{ From: &args.From, To: args.To, Gas: args.Gas, GasPrice: args.GasPrice, Value: args.Value, Data: args.Data, } gl, err := e.EstimateGas(callArgs) if err != nil { return nil, err } gasLimit = uint64(gl) } else { gasLimit = (uint64)(*args.Gas) } msg := evmtypes.NewMsgEthereumTx(nonce, args.To, amount, gasLimit, gasPrice, input) return &msg, nil }