status-go/services/wallet/transfer/commands.go

928 lines
28 KiB
Go

package transfer
import (
"context"
"database/sql"
"math/big"
"strings"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
"github.com/ethereum/go-ethereum/event"
"github.com/ethereum/go-ethereum/log"
"github.com/status-im/status-go/rpc/chain"
"github.com/status-im/status-go/services/wallet/async"
w_common "github.com/status-im/status-go/services/wallet/common"
"github.com/status-im/status-go/services/wallet/token"
"github.com/status-im/status-go/services/wallet/walletevent"
)
const (
// EventNewTransfers emitted when new block was added to the same canonical chan.
EventNewTransfers walletevent.EventType = "new-transfers"
// EventFetchingRecentHistory emitted when fetching of lastest tx history is started
EventFetchingRecentHistory walletevent.EventType = "recent-history-fetching"
// EventRecentHistoryReady emitted when fetching of lastest tx history is started
EventRecentHistoryReady walletevent.EventType = "recent-history-ready"
// EventFetchingHistoryError emitted when fetching of tx history failed
EventFetchingHistoryError walletevent.EventType = "fetching-history-error"
// EventNonArchivalNodeDetected emitted when a connection to a non archival node is detected
EventNonArchivalNodeDetected walletevent.EventType = "non-archival-node-detected"
numberOfBlocksCheckedPerIteration = 40
noBlockLimit = 0
)
var (
// This will work only for binance testnet as mainnet doesn't support
// archival request.
binanceChainMaxInitialRange = big.NewInt(500000)
binanceChainErc20BatchSize = big.NewInt(5000)
goerliErc20BatchSize = big.NewInt(100000)
goerliErc20ArbitrumBatchSize = big.NewInt(100000)
erc20BatchSize = big.NewInt(500000)
binancChainID = uint64(56)
goerliChainID = uint64(5)
goerliArbitrumChainID = uint64(421613)
binanceTestChainID = uint64(97)
)
type ethHistoricalCommand struct {
address common.Address
chainClient *chain.ClientWithFallback
balanceCache *balanceCache
feed *event.Feed
foundHeaders []*DBHeader
error error
noLimit bool
from *Block
to, resultingFrom, startBlock *big.Int
threadLimit uint32
}
type Transaction []*Transfer
func (c *ethHistoricalCommand) Command() async.Command {
return async.FiniteCommand{
Interval: 5 * time.Second,
Runable: c.Run,
}.Run
}
func (c *ethHistoricalCommand) Run(ctx context.Context) (err error) {
log.Info("eth historical downloader start", "chainID", c.chainClient.ChainID, "address", c.address,
"from", c.from.Number, "to", c.to, "noLimit", c.noLimit)
start := time.Now()
if c.from.Number != nil && c.from.Balance != nil {
c.balanceCache.addBalanceToCache(c.address, c.from.Number, c.from.Balance)
}
if c.from.Number != nil && c.from.Nonce != nil {
c.balanceCache.addNonceToCache(c.address, c.from.Number, c.from.Nonce)
}
from, headers, startBlock, err := findBlocksWithEthTransfers(ctx, c.chainClient,
c.balanceCache, c.address, c.from.Number, c.to, c.noLimit, c.threadLimit)
if err != nil {
c.error = err
log.Error("failed to find blocks with transfers", "error", err, "chainID", c.chainClient.ChainID,
"address", c.address, "from", c.from.Number, "to", c.to)
return nil
}
c.foundHeaders = headers
c.resultingFrom = from
c.startBlock = startBlock
log.Info("eth historical downloader finished successfully", "chain", c.chainClient.ChainID,
"address", c.address, "from", from, "to", c.to, "total blocks", len(headers), "time", time.Since(start))
return nil
}
type erc20HistoricalCommand struct {
erc20 BatchDownloader
address common.Address
chainClient *chain.ClientWithFallback
feed *event.Feed
iterator *IterativeDownloader
to *big.Int
from *big.Int
foundHeaders []*DBHeader
}
func (c *erc20HistoricalCommand) Command() async.Command {
return async.FiniteCommand{
Interval: 5 * time.Second,
Runable: c.Run,
}.Run
}
func getErc20BatchSize(chainID uint64) *big.Int {
if isBinanceChain(chainID) {
return binanceChainErc20BatchSize
}
if chainID == goerliChainID {
return goerliErc20BatchSize
}
if chainID == goerliArbitrumChainID {
return goerliErc20ArbitrumBatchSize
}
return erc20BatchSize
}
func (c *erc20HistoricalCommand) Run(ctx context.Context) (err error) {
log.Info("wallet historical downloader for erc20 transfers start", "chainID", c.chainClient.ChainID, "address", c.address,
"from", c.from, "to", c.to)
start := time.Now()
if c.iterator == nil {
c.iterator, err = SetupIterativeDownloader(
c.chainClient, c.address,
c.erc20, getErc20BatchSize(c.chainClient.ChainID), c.to, c.from)
if err != nil {
log.Error("failed to setup historical downloader for erc20")
return err
}
}
for !c.iterator.Finished() {
headers, _, _, err := c.iterator.Next(ctx)
if err != nil {
log.Error("failed to get next batch", "error", err)
return err
}
c.foundHeaders = append(c.foundHeaders, headers...)
}
log.Info("wallet historical downloader for erc20 transfers finished", "chainID", c.chainClient.ChainID, "address", c.address,
"from", c.from, "to", c.to, "time", time.Since(start), "headers", len(c.foundHeaders))
return nil
}
// controlCommand implements following procedure (following parts are executed sequeantially):
// - verifies that the last header that was synced is still in the canonical chain
// - runs fast indexing for each account separately
// - starts listening to new blocks and watches for reorgs
type controlCommand struct {
accounts []common.Address
db *Database
blockDAO *BlockDAO
eth *ETHDownloader
erc20 *ERC20TransfersDownloader
chainClient *chain.ClientWithFallback
feed *event.Feed
errorsCount int
nonArchivalRPCNode bool
transactionManager *TransactionManager
tokenManager *token.Manager
}
func (c *controlCommand) LoadTransfers(ctx context.Context, limit int) error {
return loadTransfers(ctx, c.accounts, c.blockDAO, c.db, c.chainClient, limit, make(map[common.Address][]*big.Int), c.transactionManager, c.tokenManager, c.feed)
}
func (c *controlCommand) Run(parent context.Context) error {
log.Info("start control command")
ctx, cancel := context.WithTimeout(parent, 3*time.Second)
head, err := c.chainClient.HeaderByNumber(ctx, nil)
cancel()
if err != nil {
if c.NewError(err) {
return nil
}
return err
}
if c.feed != nil {
c.feed.Send(walletevent.Event{
Type: EventFetchingRecentHistory,
Accounts: c.accounts,
})
}
log.Info("current head is", "block number", head.Number)
// Get last known block for each account
lastKnownEthBlocks, accountsWithoutHistory, err := c.blockDAO.GetLastKnownBlockByAddresses(c.chainClient.ChainID, c.accounts)
if err != nil {
log.Error("failed to load last head from database", "error", err)
if c.NewError(err) {
return nil
}
return err
}
// For accounts without history, find the block where 20 < headNonce - nonce < 25 (blocks have between 20-25 transactions)
fromMap := map[common.Address]*big.Int{}
if !c.nonArchivalRPCNode {
fromMap, err = findFirstRanges(parent, accountsWithoutHistory, head.Number, c.chainClient)
if err != nil {
if c.NewError(err) {
return nil
}
return err
}
}
// Set "fromByAddress" from the information we have
target := head.Number
fromByAddress := map[common.Address]*Block{}
toByAddress := map[common.Address]*big.Int{}
for _, address := range c.accounts {
from, ok := lastKnownEthBlocks[address]
if !ok {
from = &Block{Number: fromMap[address]}
}
if c.nonArchivalRPCNode {
from = &Block{Number: big.NewInt(0).Sub(target, big.NewInt(100))}
}
fromByAddress[address] = from
toByAddress[address] = target
}
bCache := newBalanceCache()
cmnd := &findAndCheckBlockRangeCommand{
accounts: c.accounts,
db: c.db,
blockDAO: c.blockDAO,
chainClient: c.chainClient,
balanceCache: bCache,
feed: c.feed,
fromByAddress: fromByAddress,
toByAddress: toByAddress,
}
err = cmnd.Command()(parent)
if err != nil {
if c.NewError(err) {
return nil
}
return err
}
if cmnd.error != nil {
if c.NewError(cmnd.error) {
return nil
}
return cmnd.error
}
err = c.LoadTransfers(parent, numberOfBlocksCheckedPerIteration)
if err != nil {
if c.NewError(err) {
return nil
}
return err
}
if c.feed != nil {
events := map[common.Address]walletevent.Event{}
for _, address := range c.accounts {
event := walletevent.Event{
Type: EventNewTransfers,
Accounts: []common.Address{address},
}
for _, header := range cmnd.foundHeaders[address] {
if event.BlockNumber == nil || header.Number.Cmp(event.BlockNumber) == 1 {
event.BlockNumber = header.Number
}
}
if event.BlockNumber != nil {
events[address] = event
}
}
for _, event := range events {
c.feed.Send(event)
}
c.feed.Send(walletevent.Event{
Type: EventRecentHistoryReady,
Accounts: c.accounts,
BlockNumber: target,
})
}
log.Info("end control command")
return err
}
func nonArchivalNodeError(err error) bool {
return strings.Contains(err.Error(), "missing trie node") ||
strings.Contains(err.Error(), "project ID does not have access to archive state")
}
func (c *controlCommand) NewError(err error) bool {
c.errorsCount++
log.Error("controlCommand error", "chainID", c.chainClient.ChainID, "error", err, "counter", c.errorsCount)
if nonArchivalNodeError(err) {
log.Info("Non archival node detected", "chainID", c.chainClient.ChainID)
c.nonArchivalRPCNode = true
c.feed.Send(walletevent.Event{
Type: EventNonArchivalNodeDetected,
})
}
if c.errorsCount >= 3 {
c.feed.Send(walletevent.Event{
Type: EventFetchingHistoryError,
Message: err.Error(),
})
return true
}
return false
}
func (c *controlCommand) Command() async.Command {
return async.FiniteCommand{
Interval: 5 * time.Second,
Runable: c.Run,
}.Run
}
type transfersCommand struct {
db *Database
blockDAO *BlockDAO
eth *ETHDownloader
blockNums []*big.Int
address common.Address
chainClient *chain.ClientWithFallback
blocksLimit int
transactionManager *TransactionManager
tokenManager *token.Manager
feed *event.Feed
// result
fetchedTransfers []Transfer
}
func (c *transfersCommand) Command() async.Command {
return async.FiniteCommand{
Interval: 5 * time.Second,
Runable: c.Run,
}.Run
}
func (c *transfersCommand) Run(ctx context.Context) (err error) {
// Take blocks from cache if available and disrespect the limit
// If no blocks are available in cache, take blocks from DB respecting the limit
// If no limit is set, take all blocks from DB
log.Info("start transfersCommand", "chain", c.chainClient.ChainID, "address", c.address, "blockNums", c.blockNums)
startTs := time.Now()
for {
blocks := c.blockNums
if blocks == nil {
blocks, _ = c.blockDAO.GetBlocksToLoadByAddress(c.chainClient.ChainID, c.address, numberOfBlocksCheckedPerIteration)
}
for _, blockNum := range blocks {
log.Debug("transfersCommand block start", "chain", c.chainClient.ChainID, "address", c.address, "block", blockNum)
allTransfers, err := c.eth.GetTransfersByNumber(ctx, blockNum)
if err != nil {
log.Error("getTransfersByBlocks error", "error", err)
return err
}
err = c.processMultiTransactions(ctx, allTransfers)
if err != nil {
log.Error("processMultiTransactions error", "error", err)
return err
}
if len(allTransfers) > 0 {
err = c.db.SaveTransfersMarkBlocksLoaded(c.chainClient.ChainID, c.address, allTransfers, []*big.Int{blockNum})
if err != nil {
log.Error("SaveTransfers error", "error", err)
return err
}
} else {
// If no transfers found, that is suspecting, because downloader returned this block as containing transfers
log.Error("no transfers found in block", "chain", c.chainClient.ChainID, "address", c.address, "block", blockNum)
err = markBlocksAsLoaded(c.chainClient.ChainID, c.db.client, c.address, []*big.Int{blockNum})
if err != nil {
log.Error("Mark blocks loaded error", "error", err)
return err
}
}
c.fetchedTransfers = append(c.fetchedTransfers, allTransfers...)
c.notifyOfNewTransfers(allTransfers)
log.Debug("transfersCommand block end", "chain", c.chainClient.ChainID, "address", c.address,
"block", blockNum, "tranfers.len", len(allTransfers), "fetchedTransfers.len", len(c.fetchedTransfers))
}
if c.blockNums != nil || len(blocks) == 0 ||
(c.blocksLimit > noBlockLimit && len(blocks) >= c.blocksLimit) {
log.Debug("loadTransfers breaking loop on block limits reached or 0 blocks", "chain", c.chainClient.ChainID,
"address", c.address, "limit", c.blocksLimit, "blocks", len(blocks))
break
}
}
log.Info("end transfersCommand", "chain", c.chainClient.ChainID, "address", c.address,
"blocks.len", len(c.blockNums), "transfers.len", len(c.fetchedTransfers), "in", time.Since(startTs))
return nil
}
// Mark all subTxs of a given Tx with the same multiTxID
func setMultiTxID(tx Transaction, multiTxID MultiTransactionIDType) {
for _, subTx := range tx {
subTx.MultiTransactionID = multiTxID
}
}
func (c *transfersCommand) propagatePendingMultiTx(tx Transaction) error {
multiTxID := NoMultiTransactionID
// If any subTx matches a pending entry, mark all of them with the corresponding multiTxID
for _, subTx := range tx {
// Update MultiTransactionID from pending entry
entry, err := c.transactionManager.GetPendingEntry(c.chainClient.ChainID, subTx.ID)
if err == nil {
// Propagate the MultiTransactionID, in case the pending entry was a multi-transaction
multiTxID = entry.MultiTransactionID
break
} else if err != sql.ErrNoRows {
log.Error("GetPendingEntry error", "error", err)
return err
}
}
if multiTxID != NoMultiTransactionID {
setMultiTxID(tx, multiTxID)
}
return nil
}
func (c *transfersCommand) checkAndProcessSwapMultiTx(ctx context.Context, tx Transaction) (bool, error) {
for _, subTx := range tx {
switch subTx.Type {
// If the Tx contains any uniswapV2Swap/uniswapV3Swap subTx, generate a Swap multiTx
case w_common.UniswapV2Swap, w_common.UniswapV3Swap:
multiTransaction, err := buildUniswapSwapMultitransaction(ctx, c.chainClient, c.tokenManager, subTx)
if err != nil {
return false, err
}
if multiTransaction != nil {
id, err := c.transactionManager.InsertMultiTransaction(multiTransaction)
if err != nil {
return false, err
}
setMultiTxID(tx, id)
return true, nil
}
}
}
return false, nil
}
func (c *transfersCommand) checkAndProcessBridgeMultiTx(ctx context.Context, tx Transaction) (bool, error) {
for _, subTx := range tx {
switch subTx.Type {
// If the Tx contains any hopBridge subTx, create/update Bridge multiTx
case w_common.HopBridgeFrom, w_common.HopBridgeTo:
multiTransaction, err := buildHopBridgeMultitransaction(ctx, c.chainClient, c.transactionManager, c.tokenManager, subTx)
if err != nil {
return false, err
}
if multiTransaction != nil {
setMultiTxID(tx, MultiTransactionIDType(multiTransaction.ID))
return true, nil
}
}
}
return false, nil
}
func (c *transfersCommand) processMultiTransactions(ctx context.Context, allTransfers []Transfer) error {
txByTxHash := subTransactionListToTransactionsByTxHash(allTransfers)
// Detect / Generate multitransactions
// Iterate over all detected transactions
for _, tx := range txByTxHash {
var err error
// First check for pre-existing pending transaction
err = c.propagatePendingMultiTx(tx)
if err != nil {
return err
}
// Then check for a Swap transaction
txProcessed, err := c.checkAndProcessSwapMultiTx(ctx, tx)
if err != nil {
return err
}
if txProcessed {
continue
}
// Then check for a Bridge transaction
_, err = c.checkAndProcessBridgeMultiTx(ctx, tx)
if err != nil {
return err
}
}
return nil
}
func (c *transfersCommand) notifyOfNewTransfers(transfers []Transfer) {
if c.feed != nil {
if len(transfers) > 0 {
c.feed.Send(walletevent.Event{
Type: EventNewTransfers,
Accounts: []common.Address{c.address},
})
}
}
}
type loadTransfersCommand struct {
accounts []common.Address
db *Database
blockDAO *BlockDAO
chainClient *chain.ClientWithFallback
blocksByAddress map[common.Address][]*big.Int
transactionManager *TransactionManager
blocksLimit int
tokenManager *token.Manager
feed *event.Feed
}
func (c *loadTransfersCommand) Command() async.Command {
return async.FiniteCommand{
Interval: 5 * time.Second,
Runable: c.Run,
}.Run
}
func (c *loadTransfersCommand) LoadTransfers(ctx context.Context, limit int, blocksByAddress map[common.Address][]*big.Int) error {
return loadTransfers(ctx, c.accounts, c.blockDAO, c.db, c.chainClient, limit, blocksByAddress, c.transactionManager, c.tokenManager, c.feed)
}
func (c *loadTransfersCommand) Run(parent context.Context) (err error) {
err = c.LoadTransfers(parent, c.blocksLimit, c.blocksByAddress)
return
}
type findAndCheckBlockRangeCommand struct {
accounts []common.Address
db *Database
blockDAO *BlockDAO
chainClient *chain.ClientWithFallback
balanceCache *balanceCache
feed *event.Feed
fromByAddress map[common.Address]*Block
toByAddress map[common.Address]*big.Int
foundHeaders map[common.Address][]*DBHeader
noLimit bool
error error
}
func (c *findAndCheckBlockRangeCommand) Command() async.Command {
return async.FiniteCommand{
Interval: 5 * time.Second,
Runable: c.Run,
}.Run
}
func (c *findAndCheckBlockRangeCommand) Run(parent context.Context) error {
log.Debug("start findAndCHeckBlockRangeCommand")
newFromByAddress, ethHeadersByAddress, err := c.fastIndex(parent, c.balanceCache, c.fromByAddress, c.toByAddress)
if err != nil {
c.error = err
// return err // In case c.noLimit is true, hystrix "max concurrency" may be reached and we will not be able to index ETH transfers. But if we return error, we will get stuck in inifinite loop.
return nil
}
if c.noLimit {
newFromByAddress = map[common.Address]*big.Int{}
for _, address := range c.accounts {
newFromByAddress[address] = c.fromByAddress[address].Number
}
}
erc20HeadersByAddress, err := c.fastIndexErc20(parent, newFromByAddress, c.toByAddress)
if err != nil {
return err
}
foundHeaders := map[common.Address][]*DBHeader{}
for _, address := range c.accounts {
ethHeaders := ethHeadersByAddress[address]
erc20Headers := erc20HeadersByAddress[address]
allHeaders := append(ethHeaders, erc20Headers...)
log.Debug("allHeaders found for account", "address", address, "allHeaders.len", len(allHeaders))
// Ensure only 1 DBHeader per block hash.
uniqHeaders := []*DBHeader{}
if len(allHeaders) > 0 {
uniqHeaders = uniqueHeaderPerBlockHash(allHeaders)
}
// Ensure only 1 PreloadedTransaction per transaction hash during block discovery.
// Full list of SubTransactions will be obtained from the receipt logs
// at a later stage.
for _, header := range uniqHeaders {
header.PreloadedTransactions = uniquePreloadedTransactionPerTxHash(header.PreloadedTransactions)
}
foundHeaders[address] = uniqHeaders
lastBlockNumber := c.toByAddress[address]
log.Debug("saving headers", "len", len(uniqHeaders), "lastBlockNumber", lastBlockNumber,
"balance", c.balanceCache.ReadCachedBalance(address, lastBlockNumber), "nonce", c.balanceCache.ReadCachedNonce(address, lastBlockNumber))
to := &Block{
Number: lastBlockNumber,
Balance: c.balanceCache.ReadCachedBalance(address, lastBlockNumber),
Nonce: c.balanceCache.ReadCachedNonce(address, lastBlockNumber),
}
log.Debug("uniqHeaders found for account", "address", address, "uniqHeaders.len", len(uniqHeaders))
err = c.db.ProcessBlocks(c.chainClient.ChainID, address, newFromByAddress[address], to, uniqHeaders)
if err != nil {
return err
}
}
c.foundHeaders = foundHeaders
log.Debug("end findAndCheckBlockRangeCommand")
return nil
}
// run fast indexing for every accont up to canonical chain head minus safety depth.
// every account will run it from last synced header.
func (c *findAndCheckBlockRangeCommand) fastIndex(ctx context.Context, bCache *balanceCache,
fromByAddress map[common.Address]*Block, toByAddress map[common.Address]*big.Int) (map[common.Address]*big.Int,
map[common.Address][]*DBHeader, error) {
log.Info("fast indexer started")
start := time.Now()
group := async.NewGroup(ctx)
commands := make([]*ethHistoricalCommand, len(c.accounts))
for i, address := range c.accounts {
eth := &ethHistoricalCommand{
chainClient: c.chainClient,
balanceCache: bCache,
address: address,
feed: c.feed,
from: fromByAddress[address],
to: toByAddress[address],
noLimit: c.noLimit,
threadLimit: NoThreadLimit,
}
commands[i] = eth
group.Add(eth.Command())
}
select {
case <-ctx.Done():
return nil, nil, ctx.Err()
case <-group.WaitAsync():
resultingFromByAddress := map[common.Address]*big.Int{}
headers := map[common.Address][]*DBHeader{}
for _, command := range commands {
if command.error != nil {
return nil, nil, command.error
}
resultingFromByAddress[command.address] = command.resultingFrom
headers[command.address] = command.foundHeaders
}
log.Info("fast indexer finished", "in", time.Since(start))
return resultingFromByAddress, headers, nil
}
}
// run fast indexing for every accont up to canonical chain head minus safety depth.
// every account will run it from last synced header.
func (c *findAndCheckBlockRangeCommand) fastIndexErc20(ctx context.Context, fromByAddress map[common.Address]*big.Int, toByAddress map[common.Address]*big.Int) (map[common.Address][]*DBHeader, error) {
log.Info("fast indexer Erc20 started")
start := time.Now()
group := async.NewGroup(ctx)
commands := make([]*erc20HistoricalCommand, len(c.accounts))
for i, address := range c.accounts {
erc20 := &erc20HistoricalCommand{
erc20: NewERC20TransfersDownloader(c.chainClient, []common.Address{address}, types.LatestSignerForChainID(c.chainClient.ToBigInt())),
chainClient: c.chainClient,
feed: c.feed,
address: address,
from: fromByAddress[address],
to: toByAddress[address],
foundHeaders: []*DBHeader{},
}
commands[i] = erc20
group.Add(erc20.Command())
}
select {
case <-ctx.Done():
return nil, ctx.Err()
case <-group.WaitAsync():
headers := map[common.Address][]*DBHeader{}
for _, command := range commands {
headers[command.address] = command.foundHeaders
}
log.Info("fast indexer Erc20 finished", "in", time.Since(start))
return headers, nil
}
}
func loadTransfers(ctx context.Context, accounts []common.Address, blockDAO *BlockDAO, db *Database,
chainClient *chain.ClientWithFallback, blocksLimitPerAccount int, blocksByAddress map[common.Address][]*big.Int,
transactionManager *TransactionManager, tokenManager *token.Manager, feed *event.Feed) error {
log.Info("loadTransfers start", "accounts", accounts, "chain", chainClient.ChainID, "limit", blocksLimitPerAccount)
start := time.Now()
group := async.NewGroup(ctx)
for _, address := range accounts {
transfers := &transfersCommand{
db: db,
blockDAO: blockDAO,
chainClient: chainClient,
address: address,
eth: &ETHDownloader{
chainClient: chainClient,
accounts: []common.Address{address},
signer: types.LatestSignerForChainID(chainClient.ToBigInt()),
db: db,
},
blockNums: blocksByAddress[address],
transactionManager: transactionManager,
tokenManager: tokenManager,
feed: feed,
}
group.Add(transfers.Command())
}
select {
case <-ctx.Done():
return ctx.Err()
case <-group.WaitAsync():
log.Info("loadTransfers finished for account", "in", time.Since(start), "chain", chainClient.ChainID)
return nil
}
}
func isBinanceChain(chainID uint64) bool {
return chainID == binancChainID || chainID == binanceTestChainID
}
func getLowestFrom(chainID uint64, to *big.Int) *big.Int {
from := big.NewInt(0)
if isBinanceChain(chainID) && big.NewInt(0).Sub(to, from).Cmp(binanceChainMaxInitialRange) == 1 {
from = big.NewInt(0).Sub(to, binanceChainMaxInitialRange)
}
return from
}
// Finds the latest range up to initialTo where the number of transactions is between 20 and 25
func findFirstRange(c context.Context, account common.Address, initialTo *big.Int, client *chain.ClientWithFallback) (*big.Int, error) {
log.Info("findFirstRange", "account", account, "initialTo", initialTo, "client", client)
from := getLowestFrom(client.ChainID, initialTo)
to := initialTo
goal := uint64(20)
if from.Cmp(to) == 0 {
return to, nil
}
firstNonce, err := client.NonceAt(c, account, to) // this is the latest nonce actually
log.Info("find range with 20 <= len(tx) <= 25", "account", account, "firstNonce", firstNonce, "from", from, "to", to)
if err != nil {
return nil, err
}
if firstNonce <= goal {
return from, nil
}
nonceDiff := firstNonce
iterations := 0
for iterations < 50 {
iterations = iterations + 1
if nonceDiff > goal {
// from = (from + to) / 2
from = from.Add(from, to)
from = from.Div(from, big.NewInt(2))
} else {
// from = from - (to - from) / 2
// to = from
diff := big.NewInt(0).Sub(to, from)
diff.Div(diff, big.NewInt(2))
to = big.NewInt(from.Int64())
from.Sub(from, diff)
}
fromNonce, err := client.NonceAt(c, account, from)
if err != nil {
return nil, err
}
nonceDiff = firstNonce - fromNonce
log.Info("next nonce", "from", from, "n", fromNonce, "diff", firstNonce-fromNonce)
if goal <= nonceDiff && nonceDiff <= (goal+5) {
log.Info("range found", "account", account, "from", from, "to", to)
return from, nil
}
}
log.Info("range found", "account", account, "from", from, "to", to)
return from, nil
}
// Finds the latest ranges up to initialTo where the number of transactions is between 20 and 25
func findFirstRanges(c context.Context, accounts []common.Address, initialTo *big.Int, client *chain.ClientWithFallback) (map[common.Address]*big.Int, error) {
res := map[common.Address]*big.Int{}
for _, address := range accounts {
from, err := findFirstRange(c, address, initialTo, client)
if err != nil {
return nil, err
}
res[address] = from
}
return res, nil
}
// Ensure 1 DBHeader per Block Hash
func uniqueHeaderPerBlockHash(allHeaders []*DBHeader) []*DBHeader {
uniqHeadersByHash := map[common.Hash]*DBHeader{}
for _, header := range allHeaders {
uniqHeader, ok := uniqHeadersByHash[header.Hash]
if ok {
if len(header.PreloadedTransactions) > 0 {
uniqHeader.PreloadedTransactions = append(uniqHeader.PreloadedTransactions, header.PreloadedTransactions...)
}
uniqHeadersByHash[header.Hash] = uniqHeader
} else {
uniqHeadersByHash[header.Hash] = header
}
}
uniqHeaders := []*DBHeader{}
for _, header := range uniqHeadersByHash {
uniqHeaders = append(uniqHeaders, header)
}
return uniqHeaders
}
// Ensure 1 PreloadedTransaction per Transaction Hash
func uniquePreloadedTransactionPerTxHash(allTransactions []*PreloadedTransaction) []*PreloadedTransaction {
uniqTransactionsByTransactionHash := map[common.Hash]*PreloadedTransaction{}
for _, transaction := range allTransactions {
uniqTransactionsByTransactionHash[transaction.Log.TxHash] = transaction
}
uniqTransactions := []*PreloadedTransaction{}
for _, transaction := range uniqTransactionsByTransactionHash {
uniqTransactions = append(uniqTransactions, transaction)
}
return uniqTransactions
}
// Organize subTransactions by Transaction Hash
func subTransactionListToTransactionsByTxHash(subTransactions []Transfer) map[common.Hash]Transaction {
rst := map[common.Hash]Transaction{}
for index := range subTransactions {
subTx := &subTransactions[index]
txHash := subTx.Transaction.Hash()
if _, ok := rst[txHash]; !ok {
rst[txHash] = make([]*Transfer, 0)
}
rst[txHash] = append(rst[txHash], subTx)
}
return rst
}