status-go/services/wallet/common/log_parser.go

672 lines
24 KiB
Go

// Moved here because transactions package depends on accounts package which
// depends on appdatabase where this functionality is needed
package common
import (
"encoding/binary"
"fmt"
"math/big"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/crypto"
"github.com/ethereum/go-ethereum/log"
)
// Type type of transaction
type Type string
// Log Event type
type EventType string
const (
// Transaction types
EthTransfer Type = "eth"
Erc20Transfer Type = "erc20"
Erc721Transfer Type = "erc721"
Erc1155Transfer Type = "erc1155"
UniswapV2Swap Type = "uniswapV2Swap"
UniswapV3Swap Type = "uniswapV3Swap"
HopBridgeFrom Type = "HopBridgeFrom"
HopBridgeTo Type = "HopBridgeTo"
unknownTransaction Type = "unknown"
// Event types
WETHDepositEventType EventType = "wethDepositEvent"
WETHWithdrawalEventType EventType = "wethWithdrawalEvent"
Erc20TransferEventType EventType = "erc20Event"
Erc721TransferEventType EventType = "erc721Event"
Erc1155TransferSingleEventType EventType = "erc1155SingleEvent"
Erc1155TransferBatchEventType EventType = "erc1155BatchEvent"
UniswapV2SwapEventType EventType = "uniswapV2SwapEvent"
UniswapV3SwapEventType EventType = "uniswapV3SwapEvent"
HopBridgeTransferSentToL2EventType EventType = "hopBridgeTransferSentToL2Event"
HopBridgeTransferFromL1CompletedEventType EventType = "hopBridgeTransferFromL1CompletedEvent"
HopBridgeWithdrawalBondedEventType EventType = "hopBridgeWithdrawalBondedEvent"
HopBridgeTransferSentEventType EventType = "hopBridgeTransferSentEvent"
UnknownEventType EventType = "unknownEvent"
// Deposit (index_topic_1 address dst, uint256 wad)
wethDepositEventSignature = "Deposit(address,uint256)"
// Withdrawal (index_topic_1 address src, uint256 wad)
wethWithdrawalEventSignature = "Withdrawal(address,uint256)"
// Transfer (index_topic_1 address from, index_topic_2 address to, uint256 value)
// Transfer (index_topic_1 address from, index_topic_2 address to, index_topic_3 uint256 tokenId)
Erc20_721TransferEventSignature = "Transfer(address,address,uint256)"
Erc1155TransferSingleEventSignature = "TransferSingle(address,address,address,uint256,uint256)" // operator, from, to, id, value
Erc1155TransferBatchEventSignature = "TransferBatch(address,address,address,uint256[],uint256[])" // operator, from, to, ids, values
erc20TransferEventIndexedParameters = 3 // signature, from, to
erc721TransferEventIndexedParameters = 4 // signature, from, to, tokenId
erc1155TransferEventIndexedParameters = 4 // signature, operator, from, to (id, value are not indexed)
// Swap (index_topic_1 address sender, uint256 amount0In, uint256 amount1In, uint256 amount0Out, uint256 amount1Out, index_topic_2 address to)
uniswapV2SwapEventSignature = "Swap(address,uint256,uint256,uint256,uint256,address)" // also used by SushiSwap
// Swap (index_topic_1 address sender, index_topic_2 address recipient, int256 amount0, int256 amount1, uint160 sqrtPriceX96, uint128 liquidity, int24 tick)
uniswapV3SwapEventSignature = "Swap(address,address,int256,int256,uint160,uint128,int24)"
// TransferSentToL2 (index_topic_1 uint256 chainId, index_topic_2 address recipient, uint256 amount, uint256 amountOutMin, uint256 deadline, index_topic_3 address relayer, uint256 relayerFee)
hopBridgeTransferSentToL2EventSignature = "TransferSentToL2(uint256,address,uint256,uint256,uint256,address,uint256)"
// TransferFromL1Completed (index_topic_1 address recipient, uint256 amount, uint256 amountOutMin, uint256 deadline, index_topic_2 address relayer, uint256 relayerFee)
HopBridgeTransferFromL1CompletedEventSignature = "TransferFromL1Completed(address,uint256,uint256,uint256,address,uint256)"
// WithdrawalBonded (index_topic_1 bytes32 transferID, uint256 amount)
hopBridgeWithdrawalBondedEventSignature = "WithdrawalBonded(bytes32,uint256)"
// TransferSent (index_topic_1 bytes32 transferID, index_topic_2 uint256 chainId, index_topic_3 address recipient, uint256 amount, bytes32 transferNonce, uint256 bonderFee, uint256 index, uint256 amountOutMin, uint256 deadline)
hopBridgeTransferSentEventSignature = "TransferSent(bytes32,uint256,address,uint256,bytes32,uint256,uint256,uint256,uint256)"
)
var (
// MaxUint256 is the maximum value that can be represented by a uint256.
MaxUint256 = new(big.Int).Sub(new(big.Int).Lsh(common.Big1, 256), common.Big1)
)
// Detect event type for a cetain item from the Events Log
func GetEventType(log *types.Log) EventType {
wethDepositEventSignatureHash := GetEventSignatureHash(wethDepositEventSignature)
wethWithdrawalEventSignatureHash := GetEventSignatureHash(wethWithdrawalEventSignature)
erc20_721TransferEventSignatureHash := GetEventSignatureHash(Erc20_721TransferEventSignature)
erc1155TransferSingleEventSignatureHash := GetEventSignatureHash(Erc1155TransferSingleEventSignature)
erc1155TransferBatchEventSignatureHash := GetEventSignatureHash(Erc1155TransferBatchEventSignature)
uniswapV2SwapEventSignatureHash := GetEventSignatureHash(uniswapV2SwapEventSignature)
uniswapV3SwapEventSignatureHash := GetEventSignatureHash(uniswapV3SwapEventSignature)
hopBridgeTransferSentToL2EventSignatureHash := GetEventSignatureHash(hopBridgeTransferSentToL2EventSignature)
hopBridgeTransferFromL1CompletedEventSignatureHash := GetEventSignatureHash(HopBridgeTransferFromL1CompletedEventSignature)
hopBridgeWithdrawalBondedEventSignatureHash := GetEventSignatureHash(hopBridgeWithdrawalBondedEventSignature)
hopBridgeTransferSentEventSignatureHash := GetEventSignatureHash(hopBridgeTransferSentEventSignature)
if len(log.Topics) > 0 {
switch log.Topics[0] {
case wethDepositEventSignatureHash:
return WETHDepositEventType
case wethWithdrawalEventSignatureHash:
return WETHWithdrawalEventType
case erc20_721TransferEventSignatureHash:
switch len(log.Topics) {
case erc20TransferEventIndexedParameters:
return Erc20TransferEventType
case erc721TransferEventIndexedParameters:
return Erc721TransferEventType
}
case erc1155TransferSingleEventSignatureHash:
return Erc1155TransferSingleEventType
case erc1155TransferBatchEventSignatureHash:
return Erc1155TransferBatchEventType
case uniswapV2SwapEventSignatureHash:
return UniswapV2SwapEventType
case uniswapV3SwapEventSignatureHash:
return UniswapV3SwapEventType
case hopBridgeTransferSentToL2EventSignatureHash:
return HopBridgeTransferSentToL2EventType
case hopBridgeTransferFromL1CompletedEventSignatureHash:
return HopBridgeTransferFromL1CompletedEventType
case hopBridgeWithdrawalBondedEventSignatureHash:
return HopBridgeWithdrawalBondedEventType
case hopBridgeTransferSentEventSignatureHash:
return HopBridgeTransferSentEventType
}
}
return UnknownEventType
}
func EventTypeToSubtransactionType(eventType EventType) Type {
switch eventType {
case Erc20TransferEventType:
return Erc20Transfer
case Erc721TransferEventType:
return Erc721Transfer
case Erc1155TransferSingleEventType, Erc1155TransferBatchEventType:
return Erc1155Transfer
case UniswapV2SwapEventType:
return UniswapV2Swap
case UniswapV3SwapEventType:
return UniswapV3Swap
case HopBridgeTransferSentToL2EventType, HopBridgeTransferSentEventType:
return HopBridgeFrom
case HopBridgeTransferFromL1CompletedEventType, HopBridgeWithdrawalBondedEventType:
return HopBridgeTo
}
return unknownTransaction
}
func GetFirstEvent(logs []*types.Log) (EventType, *types.Log) {
for _, log := range logs {
eventType := GetEventType(log)
if eventType != UnknownEventType {
return eventType, log
}
}
return UnknownEventType, nil
}
func IsTokenTransfer(logs []*types.Log) bool {
eventType, _ := GetFirstEvent(logs)
switch eventType {
case Erc20TransferEventType, Erc721TransferEventType, Erc1155TransferSingleEventType, Erc1155TransferBatchEventType:
return true
}
return false
}
func ParseWETHDepositLog(ethlog *types.Log) (src common.Address, amount *big.Int) {
amount = new(big.Int)
if len(ethlog.Topics) < 2 {
log.Warn("not enough topics for WETH deposit", "topics", ethlog.Topics)
return
}
if len(ethlog.Topics[1]) != 32 {
log.Warn("second topic is not padded to 32 byte address", "topic", ethlog.Topics[1])
return
}
copy(src[:], ethlog.Topics[1][12:])
if len(ethlog.Data) != 32 {
log.Warn("data is not padded to 32 byte big int", "data", ethlog.Data)
return
}
amount.SetBytes(ethlog.Data)
return
}
func ParseWETHWithdrawLog(ethlog *types.Log) (dst common.Address, amount *big.Int) {
amount = new(big.Int)
if len(ethlog.Topics) < 2 {
log.Warn("not enough topics for WETH withdraw", "topics", ethlog.Topics)
return
}
if len(ethlog.Topics[1]) != 32 {
log.Warn("second topic is not padded to 32 byte address", "topic", ethlog.Topics[1])
return
}
copy(dst[:], ethlog.Topics[1][12:])
if len(ethlog.Data) != 32 {
log.Warn("data is not padded to 32 byte big int", "data", ethlog.Data)
return
}
amount.SetBytes(ethlog.Data)
return
}
func ParseErc20TransferLog(ethlog *types.Log) (from, to common.Address, amount *big.Int) {
amount = new(big.Int)
if len(ethlog.Topics) < erc20TransferEventIndexedParameters {
log.Warn("not enough topics for erc20 transfer", "topics", ethlog.Topics)
return
}
var err error
from, to, err = getFromToAddresses(*ethlog)
if err != nil {
log.Error("log_parser::ParseErc20TransferLog", err)
return
}
if len(ethlog.Data) != 32 {
log.Warn("data is not padded to 32 byts big int", "data", ethlog.Data)
return
}
amount.SetBytes(ethlog.Data)
return
}
func ParseErc721TransferLog(ethlog *types.Log) (from, to common.Address, tokenID *big.Int) {
tokenID = new(big.Int)
if len(ethlog.Topics) < erc721TransferEventIndexedParameters {
log.Warn("not enough topics for erc721 transfer", "topics", ethlog.Topics)
return
}
var err error
from, to, err = getFromToAddresses(*ethlog)
if err != nil {
log.Error("log_parser::ParseErc721TransferLog", err)
return
}
tokenID.SetBytes(ethlog.Topics[3][:])
return
}
func GetLogSubTxID(log types.Log) common.Hash {
// Get unique ID by using TxHash and log index
index := [4]byte{}
binary.BigEndian.PutUint32(index[:], uint32(log.Index))
return crypto.Keccak256Hash(log.TxHash.Bytes(), index[:])
}
func getLogSubTxIDWithTokenIDIndex(log types.Log, tokenIDIdx uint16) common.Hash {
// Get unique ID by using TxHash, log index and extra bytes (token id index for ERC1155 TransferBatch)
index := [4]byte{}
value := uint32(log.Index&0x0000FFFF) | (uint32(tokenIDIdx) << 16) // log index should not exceed uint16 max value
binary.BigEndian.PutUint32(index[:], value)
return crypto.Keccak256Hash(log.TxHash.Bytes(), index[:])
}
func checkTopicsLength(ethlog types.Log, startIdx, endIdx int) (err error) {
for i := startIdx; i < endIdx; i++ {
if len(ethlog.Topics[i]) != common.HashLength {
err = fmt.Errorf("topic %d is not padded to %d byte address, topic=%s", i, common.HashLength, ethlog.Topics[i])
log.Error("log_parser::checkTopicsLength", err)
return
}
}
return
}
func getFromToAddresses(ethlog types.Log) (from, to common.Address, err error) {
eventType := GetEventType(&ethlog)
addressIdx := common.HashLength - common.AddressLength
switch eventType {
case Erc1155TransferSingleEventType, Erc1155TransferBatchEventType:
err = checkTopicsLength(ethlog, 2, 4)
if err != nil {
return
}
copy(from[:], ethlog.Topics[2][addressIdx:])
copy(to[:], ethlog.Topics[3][addressIdx:])
return
case Erc20TransferEventType, Erc721TransferEventType, UniswapV2SwapEventType, UniswapV3SwapEventType, HopBridgeTransferFromL1CompletedEventType:
err = checkTopicsLength(ethlog, 1, 3)
if err != nil {
return
}
copy(from[:], ethlog.Topics[1][addressIdx:])
copy(to[:], ethlog.Topics[2][addressIdx:])
return
}
return from, to, fmt.Errorf("unsupported event type to get from/to adddresses %s", eventType)
}
func ParseTransferLog(ethlog types.Log) (from, to common.Address, txIDs []common.Hash, tokenIDs, values []*big.Int, err error) {
eventType := GetEventType(&ethlog)
switch eventType {
case Erc20TransferEventType:
var amount *big.Int
from, to, amount = ParseErc20TransferLog(&ethlog)
txIDs = append(txIDs, GetLogSubTxID(ethlog))
values = append(values, amount)
return
case Erc721TransferEventType:
var tokenID *big.Int
from, to, tokenID = ParseErc721TransferLog(&ethlog)
txIDs = append(txIDs, GetLogSubTxID(ethlog))
tokenIDs = append(tokenIDs, tokenID)
values = append(values, big.NewInt(1))
return
case Erc1155TransferSingleEventType, Erc1155TransferBatchEventType:
_, from, to, tokenIDs, values, err = ParseErc1155TransferLog(&ethlog, eventType)
for i := range tokenIDs {
txIDs = append(txIDs, getLogSubTxIDWithTokenIDIndex(ethlog, uint16(i)))
}
return
}
return from, to, txIDs, tokenIDs, values, fmt.Errorf("unsupported event type in log_parser::ParseTransferLogs %s", eventType)
}
func ParseErc1155TransferLog(ethlog *types.Log, evType EventType) (operator, from, to common.Address, ids, amounts []*big.Int, err error) {
if len(ethlog.Topics) < erc1155TransferEventIndexedParameters {
err = fmt.Errorf("not enough topics for erc1155 transfer %s, %v", "topics", ethlog.Topics)
log.Error("log_parser::ParseErc1155TransferLog", "err", err)
return
}
err = checkTopicsLength(*ethlog, 1, erc1155TransferEventIndexedParameters)
if err != nil {
return
}
addressIdx := common.HashLength - common.AddressLength
copy(operator[:], ethlog.Topics[1][addressIdx:])
from, to, err = getFromToAddresses(*ethlog)
if err != nil {
log.Error("log_parser::ParseErc1155TransferLog", "err", err)
return
}
if len(ethlog.Data) == 0 || len(ethlog.Data)%(common.HashLength*2) != 0 {
err = fmt.Errorf("data is not padded to 64 bytes %s, %v", "data", ethlog.Data)
log.Error("log_parser::ParseErc1155TransferLog", "err", err)
return
}
if evType == Erc1155TransferSingleEventType {
ids = append(ids, new(big.Int).SetBytes(ethlog.Data[:common.HashLength]))
amounts = append(amounts, new(big.Int).SetBytes(ethlog.Data[common.HashLength:]))
log.Debug("log_parser::ParseErc1155TransferSingleLog", "ids", ids, "amounts", amounts)
} else {
// idTypeSize := new(big.Int).SetBytes(ethlog.Data[:common.HashLength]).Uint64() // Left for knowledge
// valueTypeSize := new(big.Int).SetBytes(ethlog.Data[common.HashLength : common.HashLength*2]).Uint64() // Left for knowledge
idsArraySize := new(big.Int).SetBytes(ethlog.Data[common.HashLength*2 : common.HashLength*2+common.HashLength]).Uint64()
initialOffset := common.HashLength*2 + common.HashLength
for i := 0; i < int(idsArraySize); i++ {
ids = append(ids, new(big.Int).SetBytes(ethlog.Data[initialOffset+i*common.HashLength:initialOffset+(i+1)*common.HashLength]))
}
valuesArraySize := new(big.Int).SetBytes(ethlog.Data[initialOffset+int(idsArraySize)*common.HashLength : initialOffset+int(idsArraySize+1)*common.HashLength]).Uint64()
if idsArraySize != valuesArraySize {
err = fmt.Errorf("ids and values sizes don't match %d, %d", idsArraySize, valuesArraySize)
log.Error("log_parser::ParseErc1155TransferBatchLog", "err", err)
return
}
initialOffset = initialOffset + int(idsArraySize+1)*common.HashLength
for i := 0; i < int(valuesArraySize); i++ {
amounts = append(amounts, new(big.Int).SetBytes(ethlog.Data[initialOffset+i*common.HashLength:initialOffset+(i+1)*common.HashLength]))
log.Debug("log_parser::ParseErc1155TransferBatchLog", "id", ids[i], "amount", amounts[i])
}
}
return
}
func ParseUniswapV2Log(ethlog *types.Log) (pairAddress common.Address, from common.Address, to common.Address, amount0In *big.Int, amount1In *big.Int, amount0Out *big.Int, amount1Out *big.Int, err error) {
amount0In = new(big.Int)
amount1In = new(big.Int)
amount0Out = new(big.Int)
amount1Out = new(big.Int)
if len(ethlog.Topics) < 3 {
err = fmt.Errorf("not enough topics for uniswapV2 swap %s, %v", "topics", ethlog.Topics)
return
}
pairAddress = ethlog.Address
from, to, err = getFromToAddresses(*ethlog)
if err != nil {
log.Error("log_parser::ParseUniswapV2Log", err)
return
}
if len(ethlog.Data) != 32*4 {
err = fmt.Errorf("data is not padded to 4 * 32 bytes big int %s, %v", "data", ethlog.Data)
return
}
amount0In.SetBytes(ethlog.Data[0:32])
amount1In.SetBytes(ethlog.Data[32:64])
amount0Out.SetBytes(ethlog.Data[64:96])
amount1Out.SetBytes(ethlog.Data[96:128])
return
}
func readInt256(b []byte) *big.Int {
// big.SetBytes can't tell if a number is negative or positive in itself.
// On EVM, if the returned number > max int256, it is negative.
// A number is > max int256 if the bit at position 255 is set.
ret := new(big.Int).SetBytes(b)
if ret.Bit(255) == 1 {
ret.Add(MaxUint256, new(big.Int).Neg(ret))
ret.Add(ret, common.Big1)
ret.Neg(ret)
}
return ret
}
func ParseUniswapV3Log(ethlog *types.Log) (poolAddress common.Address, sender common.Address, recipient common.Address, amount0 *big.Int, amount1 *big.Int, err error) {
amount0 = new(big.Int)
amount1 = new(big.Int)
if len(ethlog.Topics) < 3 {
err = fmt.Errorf("not enough topics for uniswapV3 swap %s, %v", "topics", ethlog.Topics)
return
}
poolAddress = ethlog.Address
sender, recipient, err = getFromToAddresses(*ethlog)
if err != nil {
log.Error("log_parser::ParseUniswapV3Log", err)
return
}
if len(ethlog.Data) != 32*5 {
err = fmt.Errorf("data is not padded to 5 * 32 bytes big int %s, %v", "data", ethlog.Data)
return
}
amount0 = readInt256(ethlog.Data[0:32])
amount1 = readInt256(ethlog.Data[32:64])
return
}
func ParseHopBridgeTransferSentToL2Log(ethlog *types.Log) (chainID uint64, recipient common.Address, relayer common.Address, amount *big.Int, err error) {
chainIDInt := new(big.Int)
amount = new(big.Int)
if len(ethlog.Topics) < 4 {
err = fmt.Errorf("not enough topics for HopBridgeTransferSentToL2 event %s, %v", "topics", ethlog.Topics)
return
}
if len(ethlog.Topics[1]) != 32 {
err = fmt.Errorf("second topic is not padded to 32 byte address %s, %v", "topic", ethlog.Topics[1])
return
}
chainIDInt.SetBytes(ethlog.Topics[1][:])
chainID = chainIDInt.Uint64()
if len(ethlog.Topics[2]) != 32 {
err = fmt.Errorf("third topic is not padded to 32 byte address %s, %v", "topic", ethlog.Topics[2])
return
}
copy(recipient[:], ethlog.Topics[2][12:])
if len(ethlog.Topics[3]) != 32 {
err = fmt.Errorf("fourth topic is not padded to 32 byte address %s, %v", "topic", ethlog.Topics[3])
return
}
copy(relayer[:], ethlog.Topics[3][12:])
if len(ethlog.Data) != 32*4 {
err = fmt.Errorf("data is not padded to 4 * 32 bytes big int %s, %v", "data", ethlog.Data)
return
}
amount.SetBytes(ethlog.Data[0:32])
return
}
func ParseHopBridgeTransferFromL1CompletedLog(ethlog *types.Log) (recipient common.Address, relayer common.Address, amount *big.Int, err error) {
amount = new(big.Int)
if len(ethlog.Topics) < 3 {
err = fmt.Errorf("not enough topics for HopBridgeTransferFromL1Completed event %s, %v", "topics", ethlog.Topics)
return
}
recipient, relayer, err = getFromToAddresses(*ethlog)
if err != nil {
log.Error("log_parser::ParseHopBridgeTransferFromL1CompletedLog", err)
return
}
if len(ethlog.Data) != 32*4 {
err = fmt.Errorf("data is not padded to 4 * 32 bytes big int %s, %v", "data", ethlog.Data)
return
}
amount.SetBytes(ethlog.Data[0:32])
return
}
func ParseHopWithdrawalBondedLog(ethlog *types.Log) (transferID *big.Int, amount *big.Int, err error) {
transferID = new(big.Int)
amount = new(big.Int)
if len(ethlog.Topics) < 2 {
err = fmt.Errorf("not enough topics for HopWithdrawalBonded event %s, %v", "topics", ethlog.Topics)
return
}
if len(ethlog.Topics[1]) != 32 {
err = fmt.Errorf("second topic is not padded to 32 byte address %s, %v", "topic", ethlog.Topics[1])
return
}
transferID.SetBytes(ethlog.Topics[1][:])
if len(ethlog.Data) != 32*1 {
err = fmt.Errorf("data is not padded to 1 * 32 bytes big int %s, %v", "data", ethlog.Data)
return
}
amount.SetBytes(ethlog.Data[0:32])
return
}
func ParseHopBridgeTransferSentLog(ethlog *types.Log) (transferID *big.Int, chainID uint64, recipient common.Address, amount *big.Int, transferNonce *big.Int, bonderFee *big.Int, index *big.Int, amountOutMin *big.Int, deadline *big.Int, err error) {
transferID = new(big.Int)
chainIDInt := new(big.Int)
amount = new(big.Int)
transferNonce = new(big.Int)
bonderFee = new(big.Int)
index = new(big.Int)
amountOutMin = new(big.Int)
deadline = new(big.Int)
if len(ethlog.Topics) < 4 {
err = fmt.Errorf("not enough topics for HopBridgeTransferSent event %s, %v", "topics", ethlog.Topics)
return
}
if len(ethlog.Topics[1]) != 32 {
err = fmt.Errorf("second topic is not padded to 32 byte big int %s, %v", "topic", ethlog.Topics[1])
return
}
transferID.SetBytes(ethlog.Topics[1][:])
if len(ethlog.Topics[2]) != 32 {
err = fmt.Errorf("third topic is not padded to 32 byte big int %s, %v", "topic", ethlog.Topics[2])
return
}
chainIDInt.SetBytes(ethlog.Topics[2][:])
chainID = chainIDInt.Uint64()
if len(ethlog.Topics[3]) != 32 {
err = fmt.Errorf("fourth topic is not padded to 32 byte address %s, %v", "topic", ethlog.Topics[3])
return
}
copy(recipient[:], ethlog.Topics[2][12:])
if len(ethlog.Data) != 32*6 {
err = fmt.Errorf("data is not padded to 6 * 32 bytes big int %s, %v", "data", ethlog.Data)
return
}
amount.SetBytes(ethlog.Data[0:32])
transferNonce.SetBytes(ethlog.Data[32:64])
bonderFee.SetBytes(ethlog.Data[64:96])
index.SetBytes(ethlog.Data[96:128])
amountOutMin.SetBytes(ethlog.Data[128:160])
deadline.SetBytes(ethlog.Data[160:192])
return
}
func GetEventSignatureHash(signature string) common.Hash {
return crypto.Keccak256Hash([]byte(signature))
}
func ExtractTokenTransferData(dbEntryType Type, log *types.Log, tx *types.Transaction) (correctType Type, tokenAddress *common.Address, txFrom *common.Address, txTo *common.Address) {
// erc721 transfers share signature with erc20 ones, so they both used to be categorized as erc20
// by the Downloader. We fix this here since they might be mis-categorized in the db.
if dbEntryType == Erc20Transfer {
eventType := GetEventType(log)
correctType = EventTypeToSubtransactionType(eventType)
} else {
correctType = dbEntryType
}
switch correctType {
case Erc20Transfer:
tokenAddress = new(common.Address)
*tokenAddress = log.Address
from, to, _ := ParseErc20TransferLog(log)
txFrom = &from
txTo = &to
case Erc721Transfer:
tokenAddress = new(common.Address)
*tokenAddress = log.Address
from, to, _ := ParseErc721TransferLog(log)
txFrom = &from
txTo = &to
case Erc1155Transfer:
tokenAddress = new(common.Address)
*tokenAddress = log.Address
_, from, to, _, _, err := ParseErc1155TransferLog(log, Erc1155TransferSingleEventType) // from/to extraction is the same for single and batch
if err != nil {
return
}
txFrom = &from
txTo = &to
}
return
}
func TxDataContainsAddress(txType uint8, txData []byte, address common.Address) bool {
// First 4 bytes are related to the methodID
const methodIDLen int = 4
const paramLen int = 32
var paramOffset int = 0
switch txType {
case types.OptimismDepositTxType:
// Offset for relayMessage data.
// I actually don't know what the 2x32 + 4 bytes mean, but it seems to be constant in all transactions I've
// checked. Will update the comment when I find out more about it.
paramOffset = 5*32 + 2*32 + 4
}
// Check if address is contained in any 32-byte parameter
for paramStart := methodIDLen + paramOffset; paramStart < len(txData); paramStart += paramLen {
paramEnd := paramStart + paramLen
if paramEnd > len(txData) {
break
}
// Address bytes should be in the last addressLen positions
paramBytes := txData[paramStart:paramEnd]
paramAddress := common.BytesToAddress(paramBytes)
if address == paramAddress {
return true
}
}
return false
}