public IEnumerable <Transaction> GetTransactionHistory(string address)
{
if (!ValidationUtils.IsValidAddress(address))
{
throw new ArgumentException("Invalid transaction address");
}
var transactionsByAddress = this.GetAllTransactions()
.Where(
t => t.From == address || t.To == address)
.OrderBy(s => DateTime.Parse(s.DateCreated))
.ToList();
return(transactionsByAddress);
}
public void Test_IsValidAddress_When_Not_Valid()
{
var validAddress = "x3293572dbe6ebc60de4a20ed0e21446cae66b17";
Assert.False(ValidationUtils.IsValidAddress(validAddress));
}
public Transaction AddNewTransaction(Transaction tranData)
{
// Validate the transaction & add it to the pending transactions
if (!ValidationUtils.IsValidAddress(tranData.From))
{
throw new ArgumentException("Invalid sender address:" + tranData.From);
}
if (!ValidationUtils.IsValidAddress(tranData.To))
{
throw new ArgumentException("Invalid recipient address:" + tranData.To);
}
if (!ValidationUtils.IsValidPublicKey(tranData.SenderPubKey))
{
throw new ArgumentException("Invalid public key:" + tranData.SenderPubKey);
}
var senderAddr = CryptoUtils.GetAddressFromPublicKey(tranData.SenderPubKey);
if (senderAddr != tranData.From)
{
throw new ArgumentException("The public key should match the sender address:" + tranData.SenderPubKey);
}
if (!ValidationUtils.IsValidTransferValue(tranData.Value))
{
throw new ArgumentException("Invalid transfer value: " + tranData.Value);
}
if (!ValidationUtils.IsValidFee(tranData.Fee))
{
throw new ArgumentException("Invalid transaction fee: " + tranData.Fee);
}
if (!ValidationUtils.IsValidDate(tranData.DateCreated))
{
throw new ArgumentException("Invalid date: " + tranData.DateCreated);
}
if (!ValidationUtils.IsValidSignatureFormat(CryptoUtils.SignatureByHex(tranData.SenderSignature)))
{
throw new ArgumentException("Invalid or missing signature. Expected signature format: BigInteger[2] " + tranData.SenderSignature);
}
var tran = new Transaction(
tranData.From,
tranData.To,
tranData.Value,
tranData.Fee,
tranData.DateCreated,
tranData.Data,
tranData.SenderPubKey,
null, // the transactionDataHash is auto-calculated
tranData.SenderSignature
);
//tran.IsSignatureValid = tranData.IsSignatureValid;
// Check for duplicated transactions (to avoid "replay attack")
var tranDataHex = CryptoUtils.BytesToHex(tran.TransactionDataHash);
if (this.FindTransactionByDataHash(tranDataHex) != null)
{
throw new ArgumentException("Duplicated transaction: " + tranDataHex);
}
if (!CryptoUtils.VerifySignature(CryptoUtils.SignatureByHex(tran.SenderSignature), tran.TransactionDataHash))
{
throw new ArgumentException("Invalid signature: " + tranData.SenderSignature);
}
var balances = this.GetAccountBalance(tran.From);
if (balances.ConfirmedBalance < tran.Fee)
{
throw new ArgumentException("Unsufficient sender balance at address: " + tran.From);
}
//if (this.PendingTransactions.Any(s => CryptoUtils.BytesToHex(s.TransactionDataHash) == CryptoUtils.BytesToHex(tran.TransactionDataHash)))
// throw new ArgumentException("Trying to add duplicate transaction: " + CryptoUtils.BytesToHex(tran.TransactionDataHash));
this.PendingTransactions.Add(tran);
Console.WriteLine("Added pending transaction: " + JsonConvert.SerializeObject(tran));
return(tran);
}
public AccountBalance GetAccountBalance(string address)
{
if (!ValidationUtils.IsValidAddress(address))
{
throw new ArgumentException("Invalid account address");
}
var transactions = this.GetTransactionHistory(address);
var balance = new AccountBalance();
foreach (var tran in transactions)
{
var confirmsCount = 0;
if (tran.MinedInBlockIndex.HasValue)
{
confirmsCount = this.Blocks.Count - tran.MinedInBlockIndex.Value + 1;
}
if (tran.From == address)
{
// Funds spent -> subtract value and fee
balance.PendingBalance -= tran.Fee;
if (confirmsCount == 0 || tran.TransferSuccessful)
{
balance.PendingBalance -= tran.Value;
}
if (confirmsCount >= 1)
{
balance.ConfirmedBalance -= tran.Fee;
if (tran.TransferSuccessful)
{
balance.ConfirmedBalance -= tran.Value;
}
}
if (confirmsCount >= Config.SafeConfirmCount)
{
balance.SafeBalance -= tran.Fee;
if (tran.TransferSuccessful)
{
balance.SafeBalance -= tran.Value;
}
}
}
if (tran.To == address)
{
// Funds received --> add value and fee
if (confirmsCount == 0 || tran.TransferSuccessful)
{
balance.PendingBalance += tran.Value;
}
if (confirmsCount >= 1 && tran.TransferSuccessful)
{
balance.ConfirmedBalance += tran.Value;
}
if (confirmsCount >= Config.SafeConfirmCount && tran.TransferSuccessful)
{
balance.SafeBalance += tran.Value;
}
}
}
return(balance);
}