public BlockChainMessageObject ProcessTransaction()
{
BlockChainMessageObject message = new BlockChainMessageObject();
if (!VerifySignature())
{
message.Message = "#Transaction signature failed to verify";
message.IsValid = false;
return(message);
}
foreach (var transactionInput in Inputs)
{
transactionInput.UTXO = BlockChain.GetUnspentTransactionOutputById(transactionInput.TransactionOutputId);
}
var totalInputValue = GetInputsValue();
if (totalInputValue < BlockChain.MinimumTransaction)
{
message.Message = $"#Transaction Input is too small {totalInputValue}";
message.IsValid = false;
return(message);
}
double remainingBalance = totalInputValue - Value;
TransactionId = CalculateHash();
Outputs.Add(new TransactionOutput(RecipientPublicKey, Value, TransactionId));
Outputs.Add(new TransactionOutput(SenderPublicKey, remainingBalance, TransactionId));
foreach (var transactionOutput in Outputs)
{
BlockChain.AddUnspentTransactionOutput(transactionOutput.Id, transactionOutput);
}
foreach (var transactionInput in Inputs)
{
if (transactionInput.UTXO == null)
{
continue;
}
BlockChain.RemoveUnspentTransactionOutput(transactionInput.UTXO.Id);
}
message.Message = "Transaction Processed!";
message.IsValid = true;
return(message);
}
public BlockChainMessageObject AddTransaction(Transaction transaction)
{
BlockChainMessageObject message = new BlockChainMessageObject();
if (transaction == null)
{
message.Message = "Invalid Transaction!";
message.IsValid = false;
return(message);
}
if (PreviousHash != _genesisBlockPreviousHash)
{
if (transaction.ProcessTransaction().IsValid != true)
{
message.Message = "Transaction failed to process. Discarded!";
message.IsValid = false;
return(message);
}
}
Transactions.Add(transaction);
message.Message = "Transaction successfully added to block";
message.IsValid = true;
return(message);
}