func (self *XEth) SignTransaction(fromStr, toStr, nonceStr, valueStr, gasStr, gasPriceStr, codeStr string) (*types.Transaction, error) {
if len(toStr) > 0 && toStr != "0x" && !isAddress(toStr) {
return nil, errors.New("Invalid address")
}
var (
from = common.HexToAddress(fromStr)
to = common.HexToAddress(toStr)
value = common.Big(valueStr)
gas *big.Int
price *big.Int
data []byte
contractCreation bool
)
if len(gasStr) == 0 {
gas = DefaultGas()
} else {
gas = common.Big(gasStr)
}
if len(gasPriceStr) == 0 {
price = self.DefaultGasPrice()
} else {
price = common.Big(gasPriceStr)
}
data = common.FromHex(codeStr)
if len(toStr) == 0 {
contractCreation = true
}
var nonce uint64
if len(nonceStr) != 0 {
nonce = common.Big(nonceStr).Uint64()
} else {
state := self.backend.TxPool().State()
nonce = state.GetNonce(from)
}
var tx *types.Transaction
if contractCreation {
tx = types.NewContractCreation(nonce, value, gas, price, data)
} else {
tx = types.NewTransaction(nonce, to, value, gas, price, data)
}
signed, err := self.sign(tx, from, false)
if err != nil {
return nil, err
}
return signed, nil
}
// validatePool removes invalid and processed transactions from the main pool.
func (pool *TxPool) validatePool() {
state := pool.currentState()
for hash, tx := range pool.pending {
from, _ := tx.From() // err already checked
// perform light nonce validation
if state.GetNonce(from) > tx.Nonce() {
if glog.V(logger.Core) {
glog.Infof("removed tx (%x) from pool: low tx nonce\n", hash[:4])
}
delete(pool.pending, hash)
}
}
}
// checkQueue moves transactions that have become processable to main pool.
func (pool *TxPool) checkQueue() {
state := pool.pendingState
var addq txQueue
for address, txs := range pool.queue {
// guessed nonce is the nonce currently kept by the tx pool (pending state)
guessedNonce := state.GetNonce(address)
// true nonce is the nonce known by the last state
trueNonce := pool.currentState().GetNonce(address)
addq := addq[:0]
for hash, tx := range txs {
if tx.Nonce() < trueNonce {
// Drop queued transactions whose nonce is lower than
// the account nonce because they have been processed.
delete(txs, hash)
} else {
// Collect the remaining transactions for the next pass.
addq = append(addq, txQueueEntry{hash, address, tx})
}
}
// Find the next consecutive nonce range starting at the
// current account nonce.
sort.Sort(addq)
for i, e := range addq {
// start deleting the transactions from the queue if they exceed the limit
if i > maxQueued {
delete(pool.queue[address], e.hash)
continue
}
if e.Nonce() > guessedNonce {
if len(addq)-i > maxQueued {
if glog.V(logger.Debug) {
glog.Infof("Queued tx limit exceeded for %s. Tx %s removed\n", common.PP(address[:]), common.PP(e.hash[:]))
}
for j := i + maxQueued; j < len(addq); j++ {
delete(txs, addq[j].hash)
}
}
break
}
delete(txs, e.hash)
pool.addTx(e.hash, address, e.Transaction)
}
// Delete the entire queue entry if it became empty.
if len(txs) == 0 {
delete(pool.queue, address)
}
}
}
// validatePool removes invalid and processed transactions from the main pool.
// If a transaction is removed for being invalid (e.g. out of funds), all sub-
// sequent (Still valid) transactions are moved back into the future queue. This
// is important to prevent a drained account from DOSing the network with non
// executable transactions.
func (pool *TxPool) validatePool() {
state, err := pool.currentState()
if err != nil {
glog.V(logger.Info).Infoln("failed to get current state: %v", err)
return
}
balanceCache := make(map[common.Address]*big.Int)
// Clean up the pending pool, accumulating invalid nonces
gaps := make(map[common.Address]uint64)
for hash, tx := range pool.pending {
sender, _ := tx.From() // err already checked
// Perform light nonce and balance validation
balance := balanceCache[sender]
if balance == nil {
balance = state.GetBalance(sender)
balanceCache[sender] = balance
}
if past := state.GetNonce(sender) > tx.Nonce(); past || balance.Cmp(tx.Cost()) < 0 {
// Remove an already past it invalidated transaction
if glog.V(logger.Core) {
glog.Infof("removed tx (%v) from pool: low tx nonce or out of funds\n", tx)
}
delete(pool.pending, hash)
// Track the smallest invalid nonce to postpone subsequent transactions
if !past {
if prev, ok := gaps[sender]; !ok || tx.Nonce() < prev {
gaps[sender] = tx.Nonce()
}
}
}
}
// Move all transactions after a gap back to the future queue
if len(gaps) > 0 {
for hash, tx := range pool.pending {
sender, _ := tx.From()
if gap, ok := gaps[sender]; ok && tx.Nonce() >= gap {
if glog.V(logger.Core) {
glog.Infof("postponed tx (%v) due to introduced gap\n", tx)
}
pool.queueTx(hash, tx)
delete(pool.pending, hash)
}
}
}
}
// demoteUnexecutables removes invalid and processed transactions from the pools
// executable/pending queue and any subsequent transactions that become unexecutable
// are moved back into the future queue.
func (pool *TxPool) demoteUnexecutables() {
// Retrieve the current state to allow nonce and balance checking
state, err := pool.currentState()
if err != nil {
glog.V(logger.Info).Infoln("failed to get current state: %v", err)
return
}
// Iterate over all accounts and demote any non-executable transactions
for addr, list := range pool.pending {
nonce := state.GetNonce(addr)
// Drop all transactions that are deemed too old (low nonce)
for _, tx := range list.Forward(nonce) {
if glog.V(logger.Core) {
glog.Infof("Removed old pending transaction: %v", tx)
}
delete(pool.all, tx.Hash())
}
// Drop all transactions that are too costly (low balance), and queue any invalids back for later
drops, invalids := list.Filter(state.GetBalance(addr))
for _, tx := range drops {
if glog.V(logger.Core) {
glog.Infof("Removed unpayable pending transaction: %v", tx)
}
delete(pool.all, tx.Hash())
}
for _, tx := range invalids {
if glog.V(logger.Core) {
glog.Infof("Demoting pending transaction: %v", tx)
}
pool.enqueueTx(tx.Hash(), tx)
}
// Delete the entire queue entry if it became empty.
if list.Empty() {
delete(pool.pending, addr)
delete(pool.beats, addr)
}
}
}
// promoteExecutables moves transactions that have become processable from the
// future queue to the set of pending transactions. During this process, all
// invalidated transactions (low nonce, low balance) are deleted.
func (pool *TxPool) promoteExecutables() {
// Init delayed since tx pool could have been started before any state sync
if pool.pendingState == nil {
pool.resetState()
}
// Retrieve the current state to allow nonce and balance checking
state, err := pool.currentState()
if err != nil {
glog.Errorf("Could not get current state: %v", err)
return
}
// Iterate over all accounts and promote any executable transactions
queued := uint64(0)
for addr, list := range pool.queue {
// Drop all transactions that are deemed too old (low nonce)
for _, tx := range list.Forward(state.GetNonce(addr)) {
if glog.V(logger.Core) {
glog.Infof("Removed old queued transaction: %v", tx)
}
delete(pool.all, tx.Hash())
}
// Drop all transactions that are too costly (low balance)
drops, _ := list.Filter(state.GetBalance(addr))
for _, tx := range drops {
if glog.V(logger.Core) {
glog.Infof("Removed unpayable queued transaction: %v", tx)
}
delete(pool.all, tx.Hash())
}
// Gather all executable transactions and promote them
for _, tx := range list.Ready(pool.pendingState.GetNonce(addr)) {
if glog.V(logger.Core) {
glog.Infof("Promoting queued transaction: %v", tx)
}
pool.promoteTx(addr, tx.Hash(), tx)
}
// Drop all transactions over the allowed limit
for _, tx := range list.Cap(int(maxQueuedPerAccount)) {
if glog.V(logger.Core) {
glog.Infof("Removed cap-exceeding queued transaction: %v", tx)
}
delete(pool.all, tx.Hash())
}
queued += uint64(list.Len())
// Delete the entire queue entry if it became empty.
if list.Empty() {
delete(pool.queue, addr)
}
}
// If we've queued more transactions than the hard limit, drop oldest ones
if queued > maxQueuedInTotal {
// Sort all accounts with queued transactions by heartbeat
addresses := make(addresssByHeartbeat, 0, len(pool.queue))
for addr, _ := range pool.queue {
addresses = append(addresses, addressByHeartbeat{addr, pool.beats[addr]})
}
sort.Sort(addresses)
// Drop transactions until the total is below the limit
for drop := queued - maxQueuedInTotal; drop > 0; {
addr := addresses[len(addresses)-1]
list := pool.queue[addr.address]
addresses = addresses[:len(addresses)-1]
// Drop all transactions if they are less than the overflow
if size := uint64(list.Len()); size <= drop {
for _, tx := range list.Flatten() {
pool.removeTx(tx.Hash())
}
drop -= size
continue
}
// Otherwise drop only last few transactions
txs := list.Flatten()
for i := len(txs) - 1; i >= 0 && drop > 0; i-- {
pool.removeTx(txs[i].Hash())
drop--
}
}
}
}
func (self *XEth) Transact(fromStr, toStr, nonceStr, valueStr, gasStr, gasPriceStr, codeStr string) (string, error) {
// this minimalistic recoding is enough (works for natspec.js)
var jsontx = fmt.Sprintf(`{"params":[{"to":"%s","data": "%s"}]}`, toStr, codeStr)
if !self.ConfirmTransaction(jsontx) {
err := fmt.Errorf("Transaction not confirmed")
return "", err
}
if len(toStr) > 0 && toStr != "0x" && !isAddress(toStr) {
return "", errors.New("Invalid address")
}
var (
from = common.HexToAddress(fromStr)
to = common.HexToAddress(toStr)
value = common.Big(valueStr)
gas *big.Int
price *big.Int
data []byte
contractCreation bool
)
if len(gasStr) == 0 {
gas = DefaultGas()
} else {
gas = common.Big(gasStr)
}
if len(gasPriceStr) == 0 {
price = self.DefaultGasPrice()
} else {
price = common.Big(gasPriceStr)
}
data = common.FromHex(codeStr)
if len(toStr) == 0 {
contractCreation = true
}
// 2015-05-18 Is this still needed?
// TODO if no_private_key then
//if _, exists := p.register[args.From]; exists {
// p.register[args.From] = append(p.register[args.From], args)
//} else {
/*
account := accounts.Get(common.FromHex(args.From))
if account != nil {
if account.Unlocked() {
if !unlockAccount(account) {
return
}
}
result, _ := account.Transact(common.FromHex(args.To), common.FromHex(args.Value), common.FromHex(args.Gas), common.FromHex(args.GasPrice), common.FromHex(args.Data))
if len(result) > 0 {
*reply = common.ToHex(result)
}
} else if _, exists := p.register[args.From]; exists {
p.register[ags.From] = append(p.register[args.From], args)
}
*/
self.transactMu.Lock()
defer self.transactMu.Unlock()
var nonce uint64
if len(nonceStr) != 0 {
nonce = common.Big(nonceStr).Uint64()
} else {
state := self.backend.TxPool().State()
nonce = state.GetNonce(from)
}
var tx *types.Transaction
if contractCreation {
tx = types.NewContractCreation(nonce, value, gas, price, data)
} else {
tx = types.NewTransaction(nonce, to, value, gas, price, data)
}
signed, err := self.sign(tx, from, false)
if err != nil {
return "", err
}
if err = self.backend.TxPool().Add(signed); err != nil {
return "", err
}
if contractCreation {
addr := crypto.CreateAddress(from, nonce)
glog.V(logger.Info).Infof("Tx(%s) created: %s\n", signed.Hash().Hex(), addr.Hex())
} else {
glog.V(logger.Info).Infof("Tx(%s) to: %s\n", signed.Hash().Hex(), tx.To().Hex())
}
return signed.Hash().Hex(), nil
}