public IBitcoinBasedTransaction CreateHtlcP2PkhSwapPaymentTx(BitcoinBasedCurrency currency)
{
var initTx = BitcoinBasedCommon.CreateFakeTx(currency, Common.Alice.PubKey, 1_0000_0000, 1_0000_0000);
const int amount = 1_0000_0000;
const int fee = 1_0000;
//const int change = 9999_0000;
var tx = currency.CreateHtlcP2PkhSwapPaymentTx(
unspentOutputs: initTx.Outputs,
aliceRefundAddress: Common.Alice.PubKey.GetAddress(currency),
bobAddress: Common.Bob.PubKey.GetAddress(currency),
lockTime: DateTimeOffset.UtcNow.AddHours(1),
secretHash: Common.SecretHash,
secretSize: Common.Secret.Length,
amount: amount,
fee: fee);
Assert.NotNull(tx);
Assert.True(tx.Check());
Assert.Equal(initTx.TotalOut - fee, tx.TotalOut);
Assert.Equal(fee, tx.GetFee(initTx.Outputs));
return(tx);
}
public async Task <IBitcoinBasedTransaction> CreateSwapPaymentTxAsync(
BitcoinBasedCurrency currency,
ClientSwap swap,
IEnumerable <string> fromWallets,
string refundAddress,
string toAddress,
DateTimeOffset lockTime,
byte[] secretHash,
int secretSize,
ITxOutputSource outputsSource)
{
var availableOutputs = (await outputsSource
.GetAvailableOutputsAsync(currency, fromWallets)
.ConfigureAwait(false))
.ToList();
var fee = 0L;
var orderAmount = (long)(AmountHelper.QtyToAmount(swap.Side, swap.Qty, swap.Price) *
currency.DigitsMultiplier);
var requiredAmount = orderAmount + fee;
long usedAmount;
IList <ITxOutput> usedOutputs;
IBitcoinBasedTransaction tx;
do
{
usedOutputs = availableOutputs
.SelectOutputsForAmount(requiredAmount)
.ToList();
usedAmount = usedOutputs.Sum(o => o.Value);
if (usedAmount < requiredAmount)
{
throw new Exception($"Insufficient funds. Available {usedAmount}, required {requiredAmount}");
}
var estimatedSigSize = EstimateSigSize(usedOutputs);
tx = currency.CreateHtlcP2PkhSwapPaymentTx(
unspentOutputs: usedOutputs,
aliceRefundAddress: refundAddress,
bobAddress: toAddress,
lockTime: lockTime,
secretHash: secretHash,
secretSize: secretSize,
amount: orderAmount,
fee: fee);
var txSize = tx.VirtualSize();
fee = (long)(currency.FeeRate * (txSize + estimatedSigSize));
requiredAmount = orderAmount + fee;
} while (usedAmount < requiredAmount);
tx = currency.CreateHtlcP2PkhSwapPaymentTx(
unspentOutputs: usedOutputs,
aliceRefundAddress: refundAddress,
bobAddress: toAddress,
lockTime: lockTime,
secretHash: secretHash,
secretSize: secretSize,
amount: orderAmount,
fee: fee);
return(tx);
}