Golang Transaction.Nonce方法代码示例

// validateTx checks whether a transaction is valid according
// to the consensus rules.
func (pool *TxPool) validateTx(tx *types.Transaction) error {
	// Validate sender
	var (
		from common.Address
		err  error
	)

	local := pool.localTx.contains(tx.Hash())
	// Drop transactions under our own minimal accepted gas price
	if !local && pool.minGasPrice.Cmp(tx.GasPrice()) > 0 {
		return ErrCheap
	}

	// Validate the transaction sender and it's sig. Throw
	// if the from fields is invalid.
	if from, err = tx.From(); err != nil {
		return ErrInvalidSender
	}

	// Make sure the account exist. Non existent accounts
	// haven't got funds and well therefor never pass.
	currentState, err := pool.currentState()
	if err != nil {
		return err
	}
	if !currentState.HasAccount(from) {
		return ErrNonExistentAccount
	}

	// Last but not least check for nonce errors
	if currentState.GetNonce(from) > tx.Nonce() {
		return ErrNonce
	}

	// Check the transaction doesn't exceed the current
	// block limit gas.
	if pool.gasLimit().Cmp(tx.Gas()) < 0 {
		return ErrGasLimit
	}

	// Transactions can't be negative. This may never happen
	// using RLP decoded transactions but may occur if you create
	// a transaction using the RPC for example.
	if tx.Value().Cmp(common.Big0) < 0 {
		return ErrNegativeValue
	}

	// Transactor should have enough funds to cover the costs
	// cost == V + GP * GL
	if currentState.GetBalance(from).Cmp(tx.Cost()) < 0 {
		return ErrInsufficientFunds
	}

	// Should supply enough intrinsic gas
	if tx.Gas().Cmp(IntrinsicGas(tx.Data())) < 0 {
		return ErrIntrinsicGas
	}

	return nil
}

// newRPCPendingTransaction returns a pending transaction that will serialize to the RPC representation
func newRPCPendingTransaction(tx *types.Transaction) *RPCTransaction {
	from, _ := tx.From()

	return &RPCTransaction{
		From:     from,
		Gas:      rpc.NewHexNumber(tx.Gas()),
		GasPrice: rpc.NewHexNumber(tx.GasPrice()),
		Hash:     tx.Hash(),
		Input:    fmt.Sprintf("0x%x", tx.Data()),
		Nonce:    rpc.NewHexNumber(tx.Nonce()),
		To:       tx.To(),
		Value:    rpc.NewHexNumber(tx.Value()),
	}
}

func newTx(t *types.Transaction) *Tx {
	from, _ := t.From()
	return &Tx{
		tx:       t,
		To:       t.To(),
		From:     from,
		Value:    rpc.NewHexNumber(t.Value()),
		Nonce:    rpc.NewHexNumber(t.Nonce()),
		Data:     "0x" + common.Bytes2Hex(t.Data()),
		GasLimit: rpc.NewHexNumber(t.Gas()),
		GasPrice: rpc.NewHexNumber(t.GasPrice()),
		Hash:     t.Hash(),
	}
}

// addTx will add a transaction to the pending (processable queue) list of transactions
func (pool *TxPool) addTx(hash common.Hash, addr common.Address, tx *types.Transaction) {
	// init delayed since tx pool could have been started before any state sync
	if pool.pendingState == nil {
		pool.resetState()
	}

	if _, ok := pool.pending[hash]; !ok {
		pool.pending[hash] = tx

		// Increment the nonce on the pending state. This can only happen if
		// the nonce is +1 to the previous one.
		pool.pendingState.SetNonce(addr, tx.Nonce()+1)
		// Notify the subscribers. This event is posted in a goroutine
		// because it's possible that somewhere during the post "Remove transaction"
		// gets called which will then wait for the global tx pool lock and deadlock.
		go pool.eventMux.Post(TxPreEvent{tx})
	}
}

// ApplyTransaction attemps to apply a transaction to the given state database
// and uses the input parameters for its environment.
//
// ApplyTransactions returns the generated receipts and vm logs during the
// execution of the state transition phase.
func ApplyTransaction(bc *BlockChain, gp *GasPool, statedb *state.StateDB, header *types.Header, tx *types.Transaction, usedGas *big.Int) (*types.Receipt, vm.Logs, *big.Int, error) {
	_, gas, err := ApplyMessage(NewEnv(statedb, bc, tx, header), tx, gp)
	if err != nil {
		return nil, nil, nil, err
	}

	// Update the state with pending changes
	usedGas.Add(usedGas, gas)
	receipt := types.NewReceipt(statedb.IntermediateRoot().Bytes(), usedGas)
	receipt.TxHash = tx.Hash()
	receipt.GasUsed = new(big.Int).Set(gas)
	if MessageCreatesContract(tx) {
		from, _ := tx.From()
		receipt.ContractAddress = crypto.CreateAddress(from, tx.Nonce())
	}

	logs := statedb.GetLogs(tx.Hash())
	receipt.Logs = logs
	receipt.Bloom = types.CreateBloom(types.Receipts{receipt})

	glog.V(logger.Debug).Infoln(receipt)

	return receipt, logs, gas, err
}

// SendRawTransaction will add the signed transaction to the transaction pool.
// The sender is responsible for signing the transaction and using the correct nonce.
func (s *PublicTransactionPoolAPI) SendRawTransaction(encodedTx string) (string, error) {
	tx := new(types.Transaction)
	if err := rlp.DecodeBytes(common.FromHex(encodedTx), tx); err != nil {
		return "", err
	}

	s.txPool.SetLocal(tx)
	if err := s.txPool.Add(tx); err != nil {
		return "", err
	}

	if tx.To() == nil {
		from, err := tx.From()
		if err != nil {
			return "", err
		}
		addr := crypto.CreateAddress(from, tx.Nonce())
		glog.V(logger.Info).Infof("Tx(%x) created: %x\n", tx.Hash(), addr)
	} else {
		glog.V(logger.Info).Infof("Tx(%x) to: %x\n", tx.Hash(), tx.To())
	}

	return tx.Hash().Hex(), nil
}