public static async Task <Fee> GetOneFeeCoin()
{
using (BlockchainStateManagerContext context = new BlockchainStateManagerContext())
{
var selectedFee = (from f in context.Fees
where f.Consumed == false
select f).FirstOrDefault();
if (selectedFee == null)
{
throw new Exception("No proper fee was found.");
}
selectedFee.Consumed = true;
await context.SaveChangesAsync();
return(selectedFee);
}
}
public async Task <Error> GenerateFees(BitcoinSecret sourceSecret, BitcoinSecret destinationSecret, int feeCount)
{
var feeAmount = Settings.Constants.BTCToSathoshiMultiplicationFactor / 100;
var coins = await explorerHelper.GetCoinsForWallet(sourceSecret.GetAddress().ToString(), 10, 0, null, null,
null, true) as GetOrdinaryCoinsForWalletReturnType;
if (coins.Error == null)
{
var selectedCoin = coins.Coins.Where(c => c.Amount >= (ulong)feeCount
* Settings.Constants.BTCToSathoshiMultiplicationFactor).FirstOrDefault();
if (selectedCoin == null)
{
Error retError = new Error();
retError.Message = "Could not find the proper coin to spend.";
return(retError);
}
try
{
TransactionBuilder builder = new TransactionBuilder();
builder.AddKeys(sourceSecret).AddCoins(selectedCoin);
for (int i = 0; i < feeCount; i++)
{
builder.Send(destinationSecret.GetAddress(),
new Money(feeAmount));
}
builder.SetChange(sourceSecret.GetAddress());
builder.SendFees(new Money(feeCount * 100000));
var tx = builder.BuildTransaction(true);
await transactionBroadcaster.BroadcastTransactionToBlockchain(tx.ToHex());
using (BlockchainStateManagerContext context = new BlockchainStateManagerContext())
{
IList <Fee> fees = new List <Fee>();
var txHash = tx.GetHash().ToString();
for (uint i = 0; i < feeCount; i++)
{
if (tx.Outputs[i].Value != feeAmount)
{
continue;
}
fees.Add(new Fee
{
Consumed = false,
TransactionId = txHash,
OutputNumber = (int)i,
Satoshi = (long)feeAmount,
PrivateKey = destinationSecret.ToString(),
Script = tx.Outputs[i].ScriptPubKey.ToString()
});
}
context.Fees.AddRange(fees);
await context.SaveChangesAsync();
}
}
catch (Exception exp)
{
Error retError = new Error();
retError.Message = string.Format("An exception occured {0}.", exp.ToString());
return(retError);
}
return(null); // No error
}
return(coins.Error);
}