public static async IAsyncEnumerable <ChangeAvoidanceSuggestionViewModel> GenerateSuggestionsAsync(
TransactionInfo transactionInfo, BitcoinAddress destination, Wallet wallet, [EnumeratorCancellation] CancellationToken cancellationToken)
{
Task <ChangeAvoidanceSuggestionViewModel?> bnbSuggestionTask = Task.Run(() =>
{
if (ChangelessTransactionCoinSelector.TryGetCoins(transactionInfo.Coins, transactionInfo.FeeRate, new TxOut(transactionInfo.Amount, destination), out IEnumerable <SmartCoin>?selection, cancellationToken))
{
BuildTransactionResult transaction = TransactionHelpers.BuildChangelessTransaction(
wallet,
destination,
transactionInfo.UserLabels,
transactionInfo.FeeRate,
selection,
tryToSign: false);
return(new ChangeAvoidanceSuggestionViewModel(
transactionInfo.Amount.ToDecimal(MoneyUnit.BTC),
transaction,
wallet.Synchronizer.UsdExchangeRate,
isOriginal: false));
}
return(null);
});
ChangeAvoidanceSuggestionViewModel?bnbSuggestion = await bnbSuggestionTask;
if (bnbSuggestion is not null)
{
yield return(bnbSuggestion);
}
}
public static async IAsyncEnumerable <ChangeAvoidanceSuggestionViewModel> GenerateSuggestionsAsync(
TransactionInfo transactionInfo,
BitcoinAddress destination,
Wallet wallet,
[EnumeratorCancellation] CancellationToken cancellationToken)
{
var selections = ChangelessTransactionCoinSelector.GetAllStrategyResultsAsync(
transactionInfo.Coins,
transactionInfo.FeeRate,
new TxOut(transactionInfo.Amount, destination),
cancellationToken).ConfigureAwait(false);
await foreach (var selection in selections)
{
if (selection.Any())
{
BuildTransactionResult transaction = TransactionHelpers.BuildChangelessTransaction(
wallet,
destination,
transactionInfo.UserLabels,
transactionInfo.FeeRate,
selection,
tryToSign: false);
yield return(new ChangeAvoidanceSuggestionViewModel(
transactionInfo.Amount.ToDecimal(MoneyUnit.BTC),
transaction,
wallet.Synchronizer.UsdExchangeRate));
}
}
}
public static async IAsyncEnumerable <ChangeAvoidanceSuggestionViewModel> GenerateSuggestionsAsync(
TransactionInfo transactionInfo,
BitcoinAddress destination,
Wallet wallet,
ImmutableArray <SmartCoin> coinsToUse,
int maxInputCount,
decimal usdExchangeRate,
[EnumeratorCancellation] CancellationToken cancellationToken)
{
var selections = ChangelessTransactionCoinSelector.GetAllStrategyResultsAsync(
coinsToUse,
transactionInfo.FeeRate,
new TxOut(transactionInfo.Amount, destination),
maxInputCount,
cancellationToken).ConfigureAwait(false);
HashSet <Money> foundSolutionsByAmount = new();
await foreach (var selection in selections)
{
if (selection.Any())
{
BuildTransactionResult transaction = TransactionHelpers.BuildChangelessTransaction(
wallet,
destination,
transactionInfo.UserLabels,
transactionInfo.FeeRate,
selection,
tryToSign: false);
var destinationAmount = transaction.CalculateDestinationAmount();
// If BnB solutions become the same transaction somehow, do not show the same suggestion twice.
if (!foundSolutionsByAmount.Contains(destinationAmount))
{
foundSolutionsByAmount.Add(destinationAmount);
yield return(new ChangeAvoidanceSuggestionViewModel(
transactionInfo.Amount.ToDecimal(MoneyUnit.BTC),
transaction,
usdExchangeRate));
}
}
}
}
