public List <Transaction> RetrieveFilteredUtxos(string walletName, string walletPassword, string transactionHex, FeeRate feeRate, string walletAccount = null)
{
var retrievalTransactions = new List <Transaction>();
Transaction transactionToReclaim = this.network.Consensus.ConsensusFactory.CreateTransaction(transactionHex);
foreach (TxOut output in transactionToReclaim.Outputs)
{
Wallet.Wallet wallet = this.GetWallet(walletName);
HdAddress address = wallet.GetAllAddresses(Wallet.Wallet.AllAccounts).FirstOrDefault(a => a.ScriptPubKey == output.ScriptPubKey);
// The address is not in the wallet so ignore this output.
if (address == null)
{
continue;
}
HdAccount destinationAccount = wallet.GetAccounts(Wallet.Wallet.NormalAccounts).First();
// This shouldn't really happen unless the user has no proper accounts in the wallet.
if (destinationAccount == null)
{
continue;
}
Script destination = destinationAccount.GetFirstUnusedReceivingAddress().ScriptPubKey;
ISecret extendedPrivateKey = wallet.GetExtendedPrivateKeyForAddress(walletPassword, address);
Key privateKey = extendedPrivateKey.PrivateKey;
var builder = new TransactionBuilder(this.network);
var coin = new Coin(transactionToReclaim, output);
builder.AddCoins(coin);
builder.AddKeys(privateKey);
builder.Send(destination, output.Value);
builder.SubtractFees();
builder.SendEstimatedFees(feeRate);
Transaction builtTransaction = builder.BuildTransaction(true);
retrievalTransactions.Add(builtTransaction);
}
return(retrievalTransactions);
}
/// <summary>
/// Creates a cold staking withdrawal <see cref="Transaction"/>.
/// </summary>
/// <remarks>
/// Cold staking withdrawal is performed on the wallet that is in the role of the cold staking cold wallet.
/// </remarks>
/// <param name="walletTransactionHandler">The wallet transaction handler used to build the transaction.</param>
/// <param name="receivingAddress">The address that will receive the withdrawal.</param>
/// <param name="walletName">The name of the wallet in the role of cold wallet.</param>
/// <param name="walletPassword">The wallet password.</param>
/// <param name="amount">The amount to remove from cold staking.</param>
/// <param name="feeAmount">The fee to pay for cold staking transaction withdrawal.</param>
/// <param name="subtractFeeFromAmount">Set to <c>true</c> to subtract the <paramref name="feeAmount"/> from the <paramref name="amount"/>.</param>
/// <returns>The <see cref="Transaction"/> for cold staking withdrawal.</returns>
/// <exception cref="WalletException">Thrown if the receiving address is in a cold staking account in this wallet.</exception>
/// <exception cref="ArgumentNullException">Thrown if the receiving address is invalid.</exception>
internal Transaction GetColdStakingWithdrawalTransaction(IWalletTransactionHandler walletTransactionHandler, string receivingAddress,
string walletName, string walletPassword, Money amount, Money feeAmount, bool subtractFeeFromAmount)
{
(TransactionBuildContext context, HdAccount coldAccount, Script destination) = this.GetWithdrawalTransactionBuildContext(receivingAddress, walletName, amount, feeAmount, subtractFeeFromAmount);
// Build the withdrawal transaction according to the settings recorded in the context.
Transaction transaction = walletTransactionHandler.BuildTransaction(context);
// Map OutPoint to UnspentOutputReference.
var accountReference = new WalletAccountReference(walletName, coldAccount.Name);
Dictionary <OutPoint, UnspentOutputReference> mapOutPointToUnspentOutput = this.GetSpendableTransactionsInAccount(accountReference)
.ToDictionary(unspent => unspent.ToOutPoint(), unspent => unspent);
// Set the cold staking scriptPubKey on the change output.
TxOut changeOutput = transaction.Outputs.SingleOrDefault(output => (output.ScriptPubKey != destination) && (output.Value != 0));
if (changeOutput != null)
{
// Find the largest input.
TxIn largestInput = transaction.Inputs.OrderByDescending(input => mapOutPointToUnspentOutput[input.PrevOut].Transaction.Amount).Take(1).Single();
// Set the scriptPubKey of the change output to the scriptPubKey of the largest input.
changeOutput.ScriptPubKey = mapOutPointToUnspentOutput[largestInput.PrevOut].Transaction.ScriptPubKey;
}
Wallet.Wallet wallet = this.GetWallet(walletName);
// Add keys for signing inputs. This takes time so only add keys for distinct addresses.
foreach (HdAddress address in transaction.Inputs.Select(i => mapOutPointToUnspentOutput[i.PrevOut].Address).Distinct())
{
context.TransactionBuilder.AddKeys(wallet.GetExtendedPrivateKeyForAddress(walletPassword, address));
}
// Sign the transaction.
context.TransactionBuilder.SignTransactionInPlace(transaction);
this.logger.LogTrace("(-):'{0}'", transaction.GetHash());
return(transaction);
}
/// <summary>
/// Creates a cold staking withdrawal <see cref="Transaction"/>.
/// </summary>
/// <remarks>
/// Cold staking withdrawal is performed on the wallet that is in the role of the cold staking cold wallet.
/// </remarks>
/// <param name="walletTransactionHandler">The wallet transaction handler used to build the transaction.</param>
/// <param name="receivingAddress">The address that will receive the withdrawal.</param>
/// <param name="walletName">The name of the wallet in the role of cold wallet.</param>
/// <param name="walletPassword">The wallet password.</param>
/// <param name="amount">The amount to remove from cold staking.</param>
/// <param name="feeAmount">The fee to pay for cold staking transaction withdrawal.</param>
/// <returns>The <see cref="Transaction"/> for cold staking withdrawal.</returns>
/// <exception cref="WalletException">Thrown if the receiving address is in a cold staking account in this wallet.</exception>
/// <exception cref="ArgumentNullException">Thrown if the receiving address is invalid.</exception>
internal Transaction GetColdStakingWithdrawalTransaction(IWalletTransactionHandler walletTransactionHandler, string receivingAddress,
string walletName, string walletPassword, Money amount, Money feeAmount)
{
Guard.NotEmpty(receivingAddress, nameof(receivingAddress));
Guard.NotEmpty(walletName, nameof(walletName));
Guard.NotNull(amount, nameof(amount));
Guard.NotNull(feeAmount, nameof(feeAmount));
this.logger.LogTrace("({0}:'{1}',{2}:'{3}',{4}:'{5}',{6}:'{7}'",
nameof(receivingAddress), receivingAddress,
nameof(walletName), walletName,
nameof(amount), amount,
nameof(feeAmount), feeAmount
);
Wallet.Wallet wallet = this.GetWalletByName(walletName);
// Get the cold staking account.
HdAccount coldAccount = this.GetColdStakingAccount(wallet, true);
if (coldAccount == null)
{
this.logger.LogTrace("(-)[COLDSTAKE_ACCOUNT_DOES_NOT_EXIST]");
throw new WalletException("The cold wallet account does not exist.");
}
// Prevent reusing cold stake addresses as regular withdrawal addresses.
if (coldAccount.ExternalAddresses.Concat(coldAccount.InternalAddresses).Select(a => a.Address.ToString()).Contains(receivingAddress))
{
this.logger.LogTrace("(-)[COLDSTAKE_INVALID_COLD_WALLET_ADDRESS_USAGE]");
throw new WalletException("You can't send the money to a cold staking cold wallet account.");
}
HdAccount hotAccount = this.GetColdStakingAccount(wallet, false);
if (hotAccount != null && hotAccount.ExternalAddresses.Concat(hotAccount.InternalAddresses).Select(a => a.Address.ToString()).Contains(receivingAddress))
{
this.logger.LogTrace("(-)[COLDSTAKE_INVALID_HOT_WALLET_ADDRESS_USAGE]");
throw new WalletException("You can't send the money to a cold staking hot wallet account.");
}
// Send the money to the receiving address.
Script destination = BitcoinAddress.Create(receivingAddress, wallet.Network).ScriptPubKey;
// Create the transaction build context (used in BuildTransaction).
var accountReference = new WalletAccountReference(walletName, coldAccount.Name);
var context = new TransactionBuildContext(wallet.Network)
{
AccountReference = accountReference,
// Specify a dummy change address to prevent a change (internal) address from being created.
// Will be changed after the transacton is built and before it is signed.
ChangeAddress = coldAccount.ExternalAddresses.First(),
TransactionFee = feeAmount,
MinConfirmations = 0,
Shuffle = false,
Recipients = new[] { new Recipient {
Amount = amount, ScriptPubKey = destination
} }.ToList()
};
// Register the cold staking builder extension with the transaction builder.
context.TransactionBuilder.Extensions.Add(new ColdStakingBuilderExtension(false));
// Avoid script errors due to missing scriptSig.
context.TransactionBuilder.StandardTransactionPolicy.ScriptVerify = null;
// Build the transaction according to the settings recorded in the context.
Transaction transaction = walletTransactionHandler.BuildTransaction(context);
// Map OutPoint to UnspentOutputReference.
Dictionary <OutPoint, UnspentOutputReference> mapOutPointToUnspentOutput = this.GetSpendableTransactionsInAccount(accountReference)
.ToDictionary(unspent => unspent.ToOutPoint(), unspent => unspent);
// Set the cold staking scriptPubKey on the change output.
TxOut changeOutput = transaction.Outputs.SingleOrDefault(output => (output.ScriptPubKey != destination) && (output.Value != 0));
if (changeOutput != null)
{
// Find the largest input.
TxIn largestInput = transaction.Inputs.OrderByDescending(input => mapOutPointToUnspentOutput[input.PrevOut].Transaction.Amount).Take(1).Single();
// Set the scriptPubKey of the change output to the scriptPubKey of the largest input.
changeOutput.ScriptPubKey = mapOutPointToUnspentOutput[largestInput.PrevOut].Transaction.ScriptPubKey;
}
// Add keys for signing inputs.
foreach (TxIn input in transaction.Inputs)
{
UnspentOutputReference unspent = mapOutPointToUnspentOutput[input.PrevOut];
context.TransactionBuilder.AddKeys(wallet.GetExtendedPrivateKeyForAddress(walletPassword, unspent.Address));
}
// Sign the transaction.
context.TransactionBuilder.SignTransactionInPlace(transaction);
this.logger.LogTrace("(-):'{0}'", transaction.GetHash());
return(transaction);
}