laconicd-deprecated/rpc/eth_api.go
Federico Kunze a243f43fe2
crypto: add keyring supported algorithms (#439)
* add keyring supported algorithms

* lint

* minor updates

* use eth_secp256k1 as the default signing algo

* add flag

* derivation func

* refactor

* rename keys amino registration

* fix keys

* address comments from review
2020-08-11 11:01:15 -04:00

990 lines
30 KiB
Go

package rpc
import (
"bytes"
"errors"
"fmt"
"log"
"math/big"
"strconv"
"strings"
"sync"
"github.com/gogo/protobuf/jsonpb"
"github.com/spf13/viper"
"github.com/cosmos/ethermint/codec"
"github.com/cosmos/ethermint/crypto"
params "github.com/cosmos/ethermint/rpc/args"
emint "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"
"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/keyring"
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"
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
backend Backend
keys []crypto.PrivKeySecp256k1
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 {
return &PublicEthAPI{
cliCtx: cliCtx,
backend: backend,
keys: key,
nonceLock: nonceLock,
}
}
// ProtocolVersion returns the supported Ethereum protocol version.
func (e *PublicEthAPI) ProtocolVersion() hexutil.Uint {
return hexutil.Uint(version.ProtocolVersion)
}
// ChainId returns the chain's identifier in hex format
func (e *PublicEthAPI) ChainId() (hexutil.Uint, error) { // nolint
// parse the chainID from a integer string
intChainID, err := strconv.ParseUint(e.cliCtx.ChainID, 0, 64)
if err != nil {
return 0, fmt.Errorf("invalid chainID: %s, must be integer format", e.cliCtx.ChainID)
}
return hexutil.Uint(intChainID), 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) {
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) {
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 {
return false
}
// Hashrate returns the current node's hashrate. Always 0.
func (e *PublicEthAPI) Hashrate() hexutil.Uint64 {
return 0
}
// GasPrice returns the current gas price based on Ethermint's gas price oracle.
func (e *PublicEthAPI) GasPrice() *hexutil.Big {
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.keybaseLock.Lock()
addresses := make([]common.Address, 0) // return [] instead of nil if empty
keybase, err := keyring.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) {
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) {
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) {
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) {
ctx := e.cliCtx.WithHeight(blockNum.Int64())
// Get nonce (sequence) from account
from := sdk.AccAddress(address.Bytes())
authclient.Codec = codec.NewAppCodec(ctx.Codec)
accRet := authtypes.NewAccountRetriever(authclient.Codec, 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 {
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 {
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) {
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) {
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) {
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) {
// 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) {
// TODO: Change this functionality to find an unlocked account by address
key, exist := checkKeyInKeyring(e.keys, args.From)
if !exist {
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 {
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
intChainID, ok := new(big.Int).SetString(chainID, 10)
if !ok {
return common.Hash{}, fmt.Errorf("invalid chainID: %s, must be integer format", chainID)
}
// Sign transaction
if err := tx.Sign(intChainID, key.ToECDSA()); err != nil {
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) {
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, overrides *map[common.Address]account) (hexutil.Bytes, error) {
simRes, err := e.doCall(args, blockNr, big.NewInt(emint.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 {
key, exist := checkKeyInKeyring(e.keys, *args.From)
if exist {
addr = common.BytesToAddress(key.PubKey().Address().Bytes())
}
// No error handled here intentionally to match geth behaviour
} 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(emint.DefaultRPCGasLimit)
if args.Gas != nil {
gas = uint64(*args.Gas)
}
if globalGasCap != nil && globalGasCap.Uint64() < gas {
log.Println("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(emint.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()))
// 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 := jsonpb.Unmarshal(strings.NewReader(string(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) {
simResponse, err := e.doCall(args, 0, big.NewInt(emint.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) {
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) {
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{} {
return map[string]interface{}{
"number": hexutil.Uint64(header.Height),
"hash": hexutil.Bytes(header.Hash()),
"parentHash": hexutil.Bytes(header.LastBlockID.Hash),
"nonce": nil, // PoW specific
"sha3Uncles": nil, // No uncles in Tendermint
"logsBloom": bloom,
"transactionsRoot": hexutil.Bytes(header.DataHash),
"stateRoot": hexutil.Bytes(header.AppHash),
"miner": common.Address{},
"difficulty": nil,
"totalDifficulty": nil,
"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{},
}
}
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
err := cliCtx.Codec.UnmarshalBinaryBare(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 &ethTx, 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) {
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) {
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) {
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) {
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) {
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.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(emint.DefaultGasPrice)
}
if args.Nonce == nil {
// Get nonce (sequence) from account
from := sdk.AccAddress(args.From.Bytes())
authclient.Codec = codec.NewAppCodec(e.cliCtx.Codec)
accRet := authtypes.NewAccountRetriever(authclient.Codec, e.cliCtx)
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
}