public AcceptTxResult Accept(Transaction tx, TxHandlingOptions handlingOptions)
{
IReleaseSpec spec = _specProvider.GetCurrentHeadSpec();
Account account = _accounts.GetAccount(tx.SenderAddress !);
UInt256 balance = account.Balance;
UInt256 cumulativeCost = UInt256.Zero;
bool overflow = false;
Transaction[] transactions = _txs.GetBucketSnapshot(tx.SenderAddress);
for (int i = 0; i < transactions.Length; i++)
{
if (transactions[i].Nonce < account.Nonce)
{
continue;
}
if (transactions[i].Nonce < tx.Nonce)
{
overflow |= UInt256.MultiplyOverflow(
transactions[i].CalculateEffectiveGasPrice(spec.IsEip1559Enabled, _headInfo.CurrentBaseFee),
(UInt256)transactions[i].GasLimit,
out UInt256 txCost);
overflow |= UInt256.AddOverflow(cumulativeCost, txCost, out cumulativeCost);
overflow |= UInt256.AddOverflow(cumulativeCost, tx.Value, out cumulativeCost);
}
else
{
break;
}
}
UInt256 affordableGasPrice = tx.CalculateAffordableGasPrice(spec.IsEip1559Enabled, _headInfo.CurrentBaseFee, balance > cumulativeCost ? balance - cumulativeCost : 0);
overflow |= spec.IsEip1559Enabled && UInt256.AddOverflow(tx.MaxPriorityFeePerGas, tx.MaxFeePerGas, out _);
overflow |= UInt256.MultiplyOverflow(affordableGasPrice, (UInt256)tx.GasLimit, out UInt256 cost);
overflow |= UInt256.AddOverflow(cost, tx.Value, out cost);
overflow |= UInt256.AddOverflow(cost, cumulativeCost, out cumulativeCost);
if (overflow)
{
if (_logger.IsTrace)
{
_logger.Trace($"Skipped adding transaction {tx.ToString(" ")}, cost overflow.");
}
return(AcceptTxResult.Int256Overflow);
}
if (balance < cumulativeCost)
{
if (_logger.IsTrace)
{
_logger.Trace($"Skipped adding transaction {tx.ToString(" ")}, insufficient funds.");
}
return(AcceptTxResult.InsufficientFunds.WithMessage($"Account balance: {balance}, cumulative cost: {cumulativeCost}"));
}
return(AcceptTxResult.Accepted);
}