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utils.go
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/
utils.go
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package types
import (
"bytes"
"context"
"encoding/hex"
"fmt"
"math/big"
"strconv"
abci "github.com/tendermint/tendermint/abci/types"
tmtypes "github.com/tendermint/tendermint/types"
"github.com/cosmos/cosmos-sdk/client"
sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
evmtypes "github.com/evmos/ethermint/x/evm/types"
feemarkettypes "github.com/evmos/ethermint/x/feemarket/types"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/common/hexutil"
"github.com/ethereum/go-ethereum/common/math"
ethtypes "github.com/ethereum/go-ethereum/core/types"
)
// RawTxToEthTx returns a evm MsgEthereum transaction from raw tx bytes.
func RawTxToEthTx(clientCtx client.Context, txBz tmtypes.Tx) ([]*evmtypes.MsgEthereumTx, error) {
tx, err := clientCtx.TxConfig.TxDecoder()(txBz)
if err != nil {
return nil, sdkerrors.Wrap(sdkerrors.ErrJSONUnmarshal, err.Error())
}
ethTxs := make([]*evmtypes.MsgEthereumTx, len(tx.GetMsgs()))
for i, msg := range tx.GetMsgs() {
ethTx, ok := msg.(*evmtypes.MsgEthereumTx)
if !ok {
return nil, fmt.Errorf("invalid message type %T, expected %T", msg, &evmtypes.MsgEthereumTx{})
}
ethTxs[i] = ethTx
}
return ethTxs, nil
}
// EthHeaderFromTendermint is an util function that returns an Ethereum Header
// from a tendermint Header.
func EthHeaderFromTendermint(header tmtypes.Header, bloom ethtypes.Bloom, baseFee *big.Int) *ethtypes.Header {
txHash := ethtypes.EmptyRootHash
if len(header.DataHash) == 0 {
txHash = common.BytesToHash(header.DataHash)
}
return ðtypes.Header{
ParentHash: common.BytesToHash(header.LastBlockID.Hash.Bytes()),
UncleHash: ethtypes.EmptyUncleHash,
Coinbase: common.BytesToAddress(header.ProposerAddress),
Root: common.BytesToHash(header.AppHash),
TxHash: txHash,
ReceiptHash: ethtypes.EmptyRootHash,
Bloom: bloom,
Difficulty: big.NewInt(0),
Number: big.NewInt(header.Height),
GasLimit: 0,
GasUsed: 0,
Time: uint64(header.Time.UTC().Unix()),
Extra: []byte{},
MixDigest: common.Hash{},
Nonce: ethtypes.BlockNonce{},
BaseFee: baseFee,
}
}
// BlockMaxGasFromConsensusParams returns the gas limit for the current block from the chain consensus params.
func BlockMaxGasFromConsensusParams(goCtx context.Context, clientCtx client.Context, blockHeight int64) (int64, error) {
resConsParams, err := clientCtx.Client.ConsensusParams(goCtx, &blockHeight)
if err != nil {
return int64(^uint32(0)), err
}
gasLimit := resConsParams.ConsensusParams.Block.MaxGas
if gasLimit == -1 {
// Sets gas limit to max uint32 to not error with javascript dev tooling
// This -1 value indicating no block gas limit is set to max uint64 with geth hexutils
// which errors certain javascript dev tooling which only supports up to 53 bits
gasLimit = int64(^uint32(0))
}
return gasLimit, nil
}
// FormatBlock creates an ethereum block from a tendermint header and ethereum-formatted
// transactions.
func FormatBlock(
header tmtypes.Header, size int, gasLimit int64,
gasUsed *big.Int, transactions []interface{}, bloom ethtypes.Bloom,
validatorAddr common.Address, baseFee *big.Int,
) map[string]interface{} {
var transactionsRoot common.Hash
if len(transactions) == 0 {
transactionsRoot = ethtypes.EmptyRootHash
} else {
transactionsRoot = common.BytesToHash(header.DataHash)
}
result := map[string]interface{}{
"number": hexutil.Uint64(header.Height),
"hash": hexutil.Bytes(header.Hash()),
"parentHash": common.BytesToHash(header.LastBlockID.Hash.Bytes()),
"nonce": ethtypes.BlockNonce{}, // PoW specific
"sha3Uncles": ethtypes.EmptyUncleHash, // No uncles in Tendermint
"logsBloom": bloom,
"stateRoot": hexutil.Bytes(header.AppHash),
"miner": validatorAddr,
"mixHash": common.Hash{},
"difficulty": (*hexutil.Big)(big.NewInt(0)),
"extraData": "0x",
"size": hexutil.Uint64(size),
"gasLimit": hexutil.Uint64(gasLimit), // Static gas limit
"gasUsed": (*hexutil.Big)(gasUsed),
"timestamp": hexutil.Uint64(header.Time.Unix()),
"transactionsRoot": transactionsRoot,
"receiptsRoot": ethtypes.EmptyRootHash,
"uncles": []common.Hash{},
"transactions": transactions,
"totalDifficulty": (*hexutil.Big)(big.NewInt(0)),
}
if baseFee != nil {
result["baseFeePerGas"] = (*hexutil.Big)(baseFee)
}
return result
}
type DataError interface {
Error() string // returns the message
ErrorData() interface{} // returns the error data
}
type dataError struct {
msg string
data string
}
func (d *dataError) Error() string {
return d.msg
}
func (d *dataError) ErrorData() interface{} {
return d.data
}
type SDKTxLogs struct {
Log string `json:"log"`
}
const LogRevertedFlag = "transaction reverted"
func ErrRevertedWith(data []byte) DataError {
return &dataError{
msg: "VM execution error.",
data: fmt.Sprintf("0x%s", hex.EncodeToString(data)),
}
}
// NewTransactionFromMsg returns a transaction that will serialize to the RPC
// representation, with the given location metadata set (if available).
func NewTransactionFromMsg(
msg *evmtypes.MsgEthereumTx,
blockHash common.Hash,
blockNumber, index uint64,
baseFee *big.Int,
) (*RPCTransaction, error) {
tx := msg.AsTransaction()
return NewRPCTransaction(tx, blockHash, blockNumber, index, baseFee)
}
// NewTransactionFromData returns a transaction that will serialize to the RPC
// representation, with the given location metadata set (if available).
func NewRPCTransaction(
tx *ethtypes.Transaction, blockHash common.Hash, blockNumber, index uint64, baseFee *big.Int,
) (*RPCTransaction, error) {
// Determine the signer. For replay-protected transactions, use the most permissive
// signer, because we assume that signers are backwards-compatible with old
// transactions. For non-protected transactions, the homestead signer signer is used
// because the return value of ChainId is zero for those transactions.
var signer ethtypes.Signer
if tx.Protected() {
signer = ethtypes.LatestSignerForChainID(tx.ChainId())
} else {
signer = ethtypes.HomesteadSigner{}
}
from, _ := ethtypes.Sender(signer, tx)
v, r, s := tx.RawSignatureValues()
result := &RPCTransaction{
Type: hexutil.Uint64(tx.Type()),
From: from,
Gas: hexutil.Uint64(tx.Gas()),
GasPrice: (*hexutil.Big)(tx.GasPrice()),
Hash: tx.Hash(),
Input: hexutil.Bytes(tx.Data()),
Nonce: hexutil.Uint64(tx.Nonce()),
To: tx.To(),
Value: (*hexutil.Big)(tx.Value()),
V: (*hexutil.Big)(v),
R: (*hexutil.Big)(r),
S: (*hexutil.Big)(s),
}
if blockHash != (common.Hash{}) {
result.BlockHash = &blockHash
result.BlockNumber = (*hexutil.Big)(new(big.Int).SetUint64(blockNumber))
result.TransactionIndex = (*hexutil.Uint64)(&index)
}
switch tx.Type() {
case ethtypes.AccessListTxType:
al := tx.AccessList()
result.Accesses = &al
result.ChainID = (*hexutil.Big)(tx.ChainId())
case ethtypes.DynamicFeeTxType:
al := tx.AccessList()
result.Accesses = &al
result.ChainID = (*hexutil.Big)(tx.ChainId())
result.GasFeeCap = (*hexutil.Big)(tx.GasFeeCap())
result.GasTipCap = (*hexutil.Big)(tx.GasTipCap())
// if the transaction has been mined, compute the effective gas price
if baseFee != nil && blockHash != (common.Hash{}) {
// price = min(tip, gasFeeCap - baseFee) + baseFee
price := math.BigMin(new(big.Int).Add(tx.GasTipCap(), baseFee), tx.GasFeeCap())
result.GasPrice = (*hexutil.Big)(price)
} else {
result.GasPrice = (*hexutil.Big)(tx.GasFeeCap())
}
}
return result, nil
}
// BaseFeeFromEvents parses the feemarket basefee from cosmos events
func BaseFeeFromEvents(events []abci.Event) *big.Int {
for _, event := range events {
if event.Type != feemarkettypes.EventTypeFeeMarket {
continue
}
for _, attr := range event.Attributes {
if bytes.Equal(attr.Key, []byte(feemarkettypes.AttributeKeyBaseFee)) {
result, success := new(big.Int).SetString(string(attr.Value), 10)
if success {
return result
}
return nil
}
}
}
return nil
}
// FindTxAttributes returns the msg index of the eth tx in cosmos tx, and the attributes,
// returns -1 and nil if not found.
func FindTxAttributes(events []abci.Event, txHash string) (int, map[string]string) {
msgIndex := -1
for _, event := range events {
if event.Type != evmtypes.EventTypeEthereumTx {
continue
}
msgIndex++
value := FindAttribute(event.Attributes, []byte(evmtypes.AttributeKeyEthereumTxHash))
if !bytes.Equal(value, []byte(txHash)) {
continue
}
// found, convert attributes to map for later lookup
attrs := make(map[string]string, len(event.Attributes))
for _, attr := range event.Attributes {
attrs[string(attr.Key)] = string(attr.Value)
}
return msgIndex, attrs
}
// not found
return -1, nil
}
// FindTxAttributesByIndex search the msg in tx events by txIndex
// returns the msgIndex, returns -1 if not found.
func FindTxAttributesByIndex(events []abci.Event, txIndex uint64) int {
strIndex := []byte(strconv.FormatUint(txIndex, 10))
txIndexKey := []byte(evmtypes.AttributeKeyTxIndex)
msgIndex := -1
for _, event := range events {
if event.Type != evmtypes.EventTypeEthereumTx {
continue
}
msgIndex++
value := FindAttribute(event.Attributes, txIndexKey)
if !bytes.Equal(value, strIndex) {
continue
}
// found, convert attributes to map for later lookup
return msgIndex
}
// not found
return -1
}
// FindAttribute find event attribute with specified key, if not found returns nil.
func FindAttribute(attrs []abci.EventAttribute, key []byte) []byte {
for _, attr := range attrs {
if !bytes.Equal(attr.Key, key) {
continue
}
return attr.Value
}
return nil
}
// GetUint64Attribute parses the uint64 value from event attributes
func GetUint64Attribute(attrs map[string]string, key string) (uint64, error) {
value, found := attrs[key]
if !found {
return 0, fmt.Errorf("tx index attribute not found: %s", key)
}
var result int64
result, err := strconv.ParseInt(value, 10, 64)
if err != nil {
return 0, err
}
if result < 0 {
return 0, fmt.Errorf("negative tx index: %d", result)
}
return uint64(result), nil
}
// AccumulativeGasUsedOfMsg accumulate the gas used by msgs before `msgIndex`.
func AccumulativeGasUsedOfMsg(events []abci.Event, msgIndex int) (gasUsed uint64) {
for _, event := range events {
if event.Type != evmtypes.EventTypeEthereumTx {
continue
}
if msgIndex < 0 {
break
}
msgIndex--
value := FindAttribute(event.Attributes, []byte(evmtypes.AttributeKeyTxGasUsed))
var result int64
result, err := strconv.ParseInt(string(value), 10, 64)
if err != nil {
continue
}
gasUsed += uint64(result)
}
return
}