Method validateTx

core/tx_pool.go:665–710

validateTx checks whether a transaction is valid according to the consensus rules and adheres to some heuristic limits of the local node (price and size).

(tx *types.Transaction, local bool)

// validateTx checks whether a transaction is valid according to the consensus
// rules and adheres to some heuristic limits of the local node (price and size).
func (pool *TxPool) validateTx(tx *types.Transaction, local bool) error {
	// Return early if the tx type is not supported!
	if !types.SupportTxType(tx.Type()) {
		return types.ErrNotSupportedTxType
	}
	// Heuristic limit, reject transactions over 32KB to prevent DOS attacks
	if tx.Size() > 32*1024 {
		return ErrOversizedData
	}
	// Transactions can't be negative. This may never happen using RLP decoded
	// transactions but may occur if you create a transaction using the RPC.
	if tx.Value().Sign() < 0 {
		return ErrNegativeValue
	}
	// Ensure the transaction doesn't exceed the current block limit gas.
	if pool.currentMaxGas < tx.Gas() {
		return ErrGasLimit
	}
	// Make sure the transaction is signed properly
	from, err := types.Sender(pool.signer, tx)
	if err != nil {
		return ErrInvalidSender
	}
	// Drop non-local transactions under our own minimal accepted gas price
	local = local || pool.locals.contains(from) // account may be local even if the transaction arrived from the network
	if !local && pool.gasPrice.Cmp(tx.GasPrice()) > 0 {
		return ErrUnderpriced
	}
	// Ensure the transaction adheres to nonce ordering
	if pool.currentState.GetNonce(from) > tx.Nonce() {
		return ErrNonceTooLow
	}
	// Transactor should have enough funds to cover the costs
	// cost == V + GP * GL
	if pool.currentState.GetBalance(from).Cmp(tx.Cost()) < 0 {
		return ErrInsufficientFunds
	}
	intrGas, err := IntrinsicGas(tx.Data(), tx.To() == nil)
	if err != nil {
		return err
	}
	if tx.Gas() < intrGas {
		return ErrIntrinsicGas
	}
	return nil
}

// add validates a transaction and inserts it into the non-executable queue for
// later pending promotion and execution. If the transaction is a replacement for