426 lines
13 KiB
Go
426 lines
13 KiB
Go
package transfer
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import (
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"context"
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"encoding/binary"
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"errors"
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"math/big"
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"time"
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"github.com/ethereum/go-ethereum"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core"
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"github.com/ethereum/go-ethereum/core/types"
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"github.com/ethereum/go-ethereum/crypto"
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"github.com/ethereum/go-ethereum/log"
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"github.com/status-im/status-go/rpc/chain"
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w_common "github.com/status-im/status-go/services/wallet/common"
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)
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type MultiTransactionIDType int64
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const (
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NoMultiTransactionID = MultiTransactionIDType(0)
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)
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func getLogSubTxID(log types.Log) common.Hash {
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// Get unique ID by using TxHash and log index
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index := [4]byte{}
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binary.BigEndian.PutUint32(index[:], uint32(log.Index))
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return crypto.Keccak256Hash(log.TxHash.Bytes(), index[:])
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}
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var (
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zero = big.NewInt(0)
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one = big.NewInt(1)
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two = big.NewInt(2)
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)
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// Partial transaction info obtained by ERC20Downloader.
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// A PreloadedTransaction represents a Transaction which contains one or more
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// ERC20/ERC721 transfer events.
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// To be converted into one or many Transfer objects post-indexing.
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type PreloadedTransaction struct {
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NetworkID uint64
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Type w_common.Type `json:"type"`
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ID common.Hash `json:"-"`
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Address common.Address `json:"address"`
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BlockNumber *big.Int `json:"blockNumber"`
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BlockHash common.Hash `json:"blockhash"`
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Loaded bool
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// From is derived from tx signature in order to offload this computation from UI component.
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From common.Address `json:"from"`
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// Log that was used to generate preloaded transaction.
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Log *types.Log `json:"log"`
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BaseGasFees string
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}
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// Transfer stores information about transfer.
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// A Transfer represents a plain ETH transfer or some token activity inside a Transaction
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type Transfer struct {
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Type w_common.Type `json:"type"`
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ID common.Hash `json:"-"`
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Address common.Address `json:"address"`
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BlockNumber *big.Int `json:"blockNumber"`
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BlockHash common.Hash `json:"blockhash"`
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Timestamp uint64 `json:"timestamp"`
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Transaction *types.Transaction `json:"transaction"`
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Loaded bool
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NetworkID uint64
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// From is derived from tx signature in order to offload this computation from UI component.
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From common.Address `json:"from"`
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Receipt *types.Receipt `json:"receipt"`
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// Log that was used to generate erc20 transfer. Nil for eth transfer.
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Log *types.Log `json:"log"`
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BaseGasFees string
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// Internal field that is used to track multi-transaction transfers.
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MultiTransactionID MultiTransactionIDType `json:"multi_transaction_id"`
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}
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// ETHDownloader downloads regular eth transfers.
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type ETHDownloader struct {
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chainClient *chain.ClientWithFallback
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accounts []common.Address
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signer types.Signer
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db *Database
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}
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var errLogsDownloaderStuck = errors.New("logs downloader stuck")
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func (d *ETHDownloader) GetTransfersByNumber(ctx context.Context, number *big.Int) ([]Transfer, error) {
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blk, err := d.chainClient.BlockByNumber(ctx, number)
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if err != nil {
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return nil, err
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}
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rst, err := d.getTransfersInBlock(ctx, blk, d.accounts)
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if err != nil {
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return nil, err
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}
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return rst, err
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}
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// Only used by status-mobile
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func getTransferByHash(ctx context.Context, client *chain.ClientWithFallback, signer types.Signer, address common.Address, hash common.Hash) (*Transfer, error) {
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transaction, _, err := client.TransactionByHash(ctx, hash)
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if err != nil {
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return nil, err
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}
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receipt, err := client.TransactionReceipt(ctx, hash)
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if err != nil {
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return nil, err
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}
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eventType, transactionLog := w_common.GetFirstEvent(receipt.Logs)
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transactionType := w_common.EventTypeToSubtransactionType(eventType)
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from, err := types.Sender(signer, transaction)
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if err != nil {
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return nil, err
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}
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baseGasFee, err := client.GetBaseFeeFromBlock(big.NewInt(int64(transactionLog.BlockNumber)))
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if err != nil {
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return nil, err
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}
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transfer := &Transfer{
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Type: transactionType,
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ID: hash,
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Address: address,
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BlockNumber: receipt.BlockNumber,
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BlockHash: receipt.BlockHash,
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Timestamp: uint64(time.Now().Unix()),
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Transaction: transaction,
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From: from,
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Receipt: receipt,
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Log: transactionLog,
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BaseGasFees: baseGasFee,
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}
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return transfer, nil
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}
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func (d *ETHDownloader) getTransfersInBlock(ctx context.Context, blk *types.Block, accounts []common.Address) (rst []Transfer, err error) {
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startTs := time.Now()
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for _, address := range accounts {
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// During block discovery, we should have populated the DB with 1 item per Transaction containing
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// erc20/erc721 transfers
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transactionsToLoad, err := d.db.GetTransactionsToLoad(d.chainClient.ChainID, address, blk.Number())
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if err != nil {
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return nil, err
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}
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for _, t := range transactionsToLoad {
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subtransactions, err := d.subTransactionsFromTransactionHash(ctx, t.Log.TxHash, address)
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if err != nil {
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log.Error("can't fetch erc20 transfer from log", "error", err)
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return nil, err
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}
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rst = append(rst, subtransactions...)
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}
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for _, tx := range blk.Transactions() {
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if tx.ChainId().Cmp(big.NewInt(0)) != 0 && tx.ChainId().Cmp(d.chainClient.ToBigInt()) != 0 {
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log.Info("chain id mismatch", "tx hash", tx.Hash(), "tx chain id", tx.ChainId(), "expected chain id", d.chainClient.ChainID)
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continue
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}
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from, err := types.Sender(d.signer, tx)
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if err != nil {
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if err == core.ErrTxTypeNotSupported {
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continue
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}
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return nil, err
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}
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if from == address || (tx.To() != nil && *tx.To() == address) {
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receipt, err := d.chainClient.TransactionReceipt(ctx, tx.Hash())
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if err != nil {
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return nil, err
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}
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eventType, _ := w_common.GetFirstEvent(receipt.Logs)
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baseGasFee, err := d.chainClient.GetBaseFeeFromBlock(blk.Number())
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if err != nil {
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return nil, err
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}
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// If the transaction is not already some known transfer type, add it
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// to the list as a plain eth transfer
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if eventType == w_common.UnknownEventType {
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rst = append(rst, Transfer{
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Type: w_common.EthTransfer,
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ID: tx.Hash(),
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Address: address,
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BlockNumber: blk.Number(),
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BlockHash: receipt.BlockHash,
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Timestamp: blk.Time(),
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Transaction: tx,
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From: from,
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Receipt: receipt,
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Log: nil,
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BaseGasFees: baseGasFee,
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MultiTransactionID: NoMultiTransactionID})
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}
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}
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}
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}
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log.Debug("getTransfersInBlock found", "block", blk.Number(), "len", len(rst), "time", time.Since(startTs))
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// TODO(dshulyak) test that balance difference was covered by transactions
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return rst, nil
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}
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// NewERC20TransfersDownloader returns new instance.
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func NewERC20TransfersDownloader(client *chain.ClientWithFallback, accounts []common.Address, signer types.Signer) *ERC20TransfersDownloader {
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signature := w_common.GetEventSignatureHash(w_common.Erc20_721TransferEventSignature)
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return &ERC20TransfersDownloader{
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client: client,
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accounts: accounts,
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signature: signature,
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signer: signer,
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}
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}
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// ERC20TransfersDownloader is a downloader for erc20 and erc721 tokens transfers.
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// Since both transaction types share the same signature, both will be assigned
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// type Erc20Transfer. Until the downloader gets refactored and a migration of the
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// database gets implemented, differentiation between erc20 and erc721 will handled
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// in the controller.
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type ERC20TransfersDownloader struct {
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client *chain.ClientWithFallback
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accounts []common.Address
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// hash of the Transfer event signature
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signature common.Hash
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// signer is used to derive tx sender from tx signature
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signer types.Signer
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}
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func (d *ERC20TransfersDownloader) paddedAddress(address common.Address) common.Hash {
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rst := common.Hash{}
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copy(rst[12:], address[:])
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return rst
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}
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func (d *ERC20TransfersDownloader) inboundTopics(address common.Address) [][]common.Hash {
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return [][]common.Hash{{d.signature}, {}, {d.paddedAddress(address)}}
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}
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func (d *ERC20TransfersDownloader) outboundTopics(address common.Address) [][]common.Hash {
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return [][]common.Hash{{d.signature}, {d.paddedAddress(address)}, {}}
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}
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func (d *ETHDownloader) subTransactionsFromTransactionHash(parent context.Context, txHash common.Hash, address common.Address) ([]Transfer, error) {
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ctx, cancel := context.WithTimeout(parent, 3*time.Second)
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tx, _, err := d.chainClient.TransactionByHash(ctx, txHash)
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cancel()
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if err != nil {
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return nil, err
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}
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from, err := types.Sender(d.signer, tx)
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if err != nil {
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return nil, err
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}
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ctx, cancel = context.WithTimeout(parent, 3*time.Second)
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receipt, err := d.chainClient.TransactionReceipt(ctx, txHash)
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cancel()
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if err != nil {
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return nil, err
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}
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baseGasFee, err := d.chainClient.GetBaseFeeFromBlock(receipt.BlockNumber)
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if err != nil {
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return nil, err
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}
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ctx, cancel = context.WithTimeout(parent, 3*time.Second)
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blk, err := d.chainClient.BlockByHash(ctx, receipt.BlockHash)
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cancel()
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if err != nil {
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return nil, err
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}
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rst := make([]Transfer, 0, len(receipt.Logs))
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for _, log := range receipt.Logs {
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eventType := w_common.GetEventType(log)
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// Only add ERC20/ERC721 transfers from/to the given account
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// Other types of events get always added
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mustAppend := false
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switch eventType {
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case w_common.Erc20TransferEventType:
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from, to, _ := w_common.ParseErc20TransferLog(log)
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if from == address || to == address {
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mustAppend = true
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}
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case w_common.Erc721TransferEventType:
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from, to, _ := w_common.ParseErc721TransferLog(log)
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if from == address || to == address {
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mustAppend = true
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}
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case w_common.UniswapV2SwapEventType, w_common.UniswapV3SwapEventType:
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mustAppend = true
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}
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if mustAppend {
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transfer := Transfer{
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Type: w_common.EventTypeToSubtransactionType(eventType),
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ID: getLogSubTxID(*log),
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Address: address,
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BlockNumber: new(big.Int).SetUint64(log.BlockNumber),
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BlockHash: log.BlockHash,
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Loaded: true,
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From: from,
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Log: log,
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BaseGasFees: baseGasFee,
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Transaction: tx,
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Receipt: receipt,
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Timestamp: blk.Time(),
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MultiTransactionID: NoMultiTransactionID,
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}
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rst = append(rst, transfer)
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}
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}
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return rst, nil
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}
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func (d *ERC20TransfersDownloader) blocksFromLogs(parent context.Context, logs []types.Log, address common.Address) ([]*DBHeader, error) {
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concurrent := NewConcurrentDownloader(parent, NoThreadLimit)
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for i := range logs {
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l := logs[i]
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if l.Removed {
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continue
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}
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id := getLogSubTxID(l)
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baseGasFee, err := d.client.GetBaseFeeFromBlock(new(big.Int).SetUint64(l.BlockNumber))
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if err != nil {
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return nil, err
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}
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header := &DBHeader{
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Number: big.NewInt(int64(l.BlockNumber)),
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Hash: l.BlockHash,
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PreloadedTransactions: []*PreloadedTransaction{{
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Address: address,
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BlockNumber: big.NewInt(int64(l.BlockNumber)),
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BlockHash: l.BlockHash,
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ID: id,
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From: address,
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Loaded: false,
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Type: w_common.Erc20Transfer,
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Log: &l,
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BaseGasFees: baseGasFee,
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}},
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Loaded: false,
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}
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concurrent.Add(func(ctx context.Context) error {
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concurrent.PushHeader(header)
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return nil
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})
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}
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select {
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case <-concurrent.WaitAsync():
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case <-parent.Done():
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return nil, errLogsDownloaderStuck
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}
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return concurrent.GetHeaders(), concurrent.Error()
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}
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// GetHeadersInRange returns transfers between two blocks.
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// time to get logs for 100000 blocks = 1.144686979s. with 249 events in the result set.
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func (d *ERC20TransfersDownloader) GetHeadersInRange(parent context.Context, from, to *big.Int) ([]*DBHeader, error) {
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start := time.Now()
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log.Debug("get erc20 transfers in range start", "chainID", d.client.ChainID, "from", from, "to", to)
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headers := []*DBHeader{}
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ctx := context.Background()
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for _, address := range d.accounts {
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outbound, err := d.client.FilterLogs(ctx, ethereum.FilterQuery{
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FromBlock: from,
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ToBlock: to,
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Topics: d.outboundTopics(address),
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})
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if err != nil {
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return nil, err
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}
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inbound, err := d.client.FilterLogs(ctx, ethereum.FilterQuery{
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FromBlock: from,
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ToBlock: to,
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Topics: d.inboundTopics(address),
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})
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if err != nil {
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return nil, err
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}
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logs := append(outbound, inbound...)
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if len(logs) == 0 {
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continue
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}
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rst, err := d.blocksFromLogs(parent, logs, address)
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if err != nil {
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return nil, err
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}
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if len(rst) == 0 {
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log.Warn("no headers found in logs for account", "chainID", d.client.ChainID, "address", address, "from", from, "to", to)
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continue
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} else {
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headers = append(headers, rst...)
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log.Debug("found erc20 transfers for account", "chainID", d.client.ChainID, "address", address,
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"from", from, "to", to, "headers", len(headers))
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}
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}
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log.Debug("get erc20 transfers in range end", "chainID", d.client.ChainID,
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"from", from, "to", to, "headers", len(headers), "took", time.Since(start))
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return headers, nil
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}
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