public EstimateFeeResult EstimateFee(ScTxFeeEstimateRequest request)
{
Features.Wallet.Wallet wallet = this.walletManager.GetWallet(request.WalletName);
HdAccount account = wallet.GetAccount(request.AccountName);
if (account == null)
{
return(EstimateFeeResult.Failure(AccountNotInWalletError, $"No account with the name '{request.AccountName}' could be found."));
}
HdAddress senderAddress = account.GetCombinedAddresses().FirstOrDefault(x => x.Address == request.Sender);
if (senderAddress == null)
{
return(EstimateFeeResult.Failure(SenderNotInWalletError, $"The given address {request.Sender} was not found in the wallet."));
}
if (!this.CheckBalance(senderAddress.Address))
{
return(EstimateFeeResult.Failure(InsufficientBalanceError, SenderNoBalanceError));
}
List <OutPoint> selectedInputs = this.SelectInputs(request.WalletName, request.Sender, request.Outpoints);
if (!selectedInputs.Any())
{
return(EstimateFeeResult.Failure(InvalidOutpointsError, "Invalid list of request outpoints have been passed to the method. Please ensure that the outpoints are spendable by the sender address."));
}
var recipients = new List <Recipient>();
foreach (RecipientModel recipientModel in request.Recipients)
{
BitcoinAddress bitcoinAddress = BitcoinAddress.Create(recipientModel.DestinationAddress, this.network);
// If it's a potential SC address, check if it's a contract.
if (bitcoinAddress is BitcoinPubKeyAddress bitcoinPubKeyAddress)
{
var address = new uint160(bitcoinPubKeyAddress.Hash.ToBytes());
if (this.stateRoot.IsExist(address))
{
return(EstimateFeeResult.Failure(TransferFundsToContractError,
$"The recipient address {recipientModel.DestinationAddress} is a contract. Transferring funds directly to a contract is not supported."));
}
}
recipients.Add(new Recipient
{
ScriptPubKey = bitcoinAddress.ScriptPubKey,
Amount = recipientModel.Amount
});
}
// Build context
var context = new TransactionBuildContext(this.network)
{
AccountReference = new WalletAccountReference(request.WalletName, request.AccountName),
MinConfirmations = MinConfirmationsAllChecks,
Shuffle = false,
OpReturnData = request.OpReturnData,
OpReturnAmount = string.IsNullOrEmpty(request.OpReturnAmount) ? null : Money.Parse(request.OpReturnAmount),
SelectedInputs = selectedInputs,
AllowOtherInputs = false,
Recipients = recipients,
ChangeAddress = senderAddress,
// Unique for fee estimation
TransactionFee = null,
FeeType = FeeParser.Parse(request.FeeType),
Sign = false,
};
Money fee = this.walletTransactionHandler.EstimateFee(context);
return(EstimateFeeResult.Success(fee));
}
public BuildCallContractTransactionResponse BuildCallTx(BuildCallContractTransactionRequest request)
{
if (!this.CheckBalance(request.Sender))
{
return(BuildCallContractTransactionResponse.Failed(SenderNoBalanceError));
}
List <OutPoint> selectedInputs = this.SelectInputs(request.WalletName, request.Sender, request.Outpoints);
if (!selectedInputs.Any())
{
return(BuildCallContractTransactionResponse.Failed("Invalid list of request outpoints have been passed to the method. Please ensure that the outpoints are spendable by the sender address"));
}
uint160 addressNumeric = request.ContractAddress.ToUint160(this.network);
ContractTxData txData;
if (request.Parameters != null && request.Parameters.Any())
{
try
{
object[] methodParameters = this.methodParameterStringSerializer.Deserialize(request.Parameters);
txData = new ContractTxData(ReflectionVirtualMachine.VmVersion, (Stratis.SmartContracts.RuntimeObserver.Gas)request.GasPrice, (Stratis.SmartContracts.RuntimeObserver.Gas)request.GasLimit, addressNumeric, request.MethodName, methodParameters);
}
catch (MethodParameterStringSerializerException exception)
{
return(BuildCallContractTransactionResponse.Failed(exception.Message));
}
}
else
{
txData = new ContractTxData(ReflectionVirtualMachine.VmVersion, (Stratis.SmartContracts.RuntimeObserver.Gas)request.GasPrice, (Stratis.SmartContracts.RuntimeObserver.Gas)request.GasLimit, addressNumeric, request.MethodName);
}
HdAddress senderAddress = null;
if (!string.IsNullOrWhiteSpace(request.Sender))
{
Features.Wallet.Wallet wallet = this.walletManager.GetWallet(request.WalletName);
HdAccount account = wallet.GetAccount(request.AccountName);
if (account == null)
{
return(BuildCallContractTransactionResponse.Failed($"No account with the name '{request.AccountName}' could be found."));
}
senderAddress = account.GetCombinedAddresses().FirstOrDefault(x => x.Address == request.Sender);
}
ulong totalFee = (request.GasPrice * request.GasLimit) + Money.Parse(request.FeeAmount);
var context = new TransactionBuildContext(this.network)
{
AccountReference = new WalletAccountReference(request.WalletName, request.AccountName),
TransactionFee = totalFee,
ChangeAddress = senderAddress,
SelectedInputs = selectedInputs,
MinConfirmations = MinConfirmationsAllChecks,
WalletPassword = request.Password,
Recipients = new[] { new Recipient {
Amount = request.Amount, ScriptPubKey = new Script(this.callDataSerializer.Serialize(txData))
} }.ToList()
};
try
{
Transaction transaction = this.walletTransactionHandler.BuildTransaction(context);
return(BuildCallContractTransactionResponse.Succeeded(request.MethodName, transaction, context.TransactionFee));
}
catch (Exception exception)
{
return(BuildCallContractTransactionResponse.Failed(exception.Message));
}
}
public BuildCreateContractTransactionResponse BuildCreateTx(BuildCreateContractTransactionRequest request)
{
if (!this.CheckBalance(request.Sender))
{
return(BuildCreateContractTransactionResponse.Failed(SenderNoBalanceError));
}
List <OutPoint> selectedInputs = this.SelectInputs(request.WalletName, request.Sender, request.Outpoints);
if (!selectedInputs.Any())
{
return(BuildCreateContractTransactionResponse.Failed("Invalid list of request outpoints have been passed to the method. Please ensure that the outpoints are spendable by the sender address"));
}
ContractTxData txData;
if (request.Parameters != null && request.Parameters.Any())
{
try
{
object[] methodParameters = this.methodParameterStringSerializer.Deserialize(request.Parameters);
txData = new ContractTxData(ReflectionVirtualMachine.VmVersion, (Stratis.SmartContracts.RuntimeObserver.Gas)request.GasPrice, (Stratis.SmartContracts.RuntimeObserver.Gas)request.GasLimit, request.ContractCode.HexToByteArray(), methodParameters);
}
catch (MethodParameterStringSerializerException exception)
{
return(BuildCreateContractTransactionResponse.Failed(exception.Message));
}
}
else
{
txData = new ContractTxData(ReflectionVirtualMachine.VmVersion, (Stratis.SmartContracts.RuntimeObserver.Gas)request.GasPrice, (Stratis.SmartContracts.RuntimeObserver.Gas)request.GasLimit, request.ContractCode.HexToByteArray());
}
HdAddress senderAddress = null;
if (!string.IsNullOrWhiteSpace(request.Sender))
{
Features.Wallet.Wallet wallet = this.walletManager.GetWallet(request.WalletName);
HdAccount account = wallet.GetAccount(request.AccountName);
if (account == null)
{
return(BuildCreateContractTransactionResponse.Failed($"No account with the name '{request.AccountName}' could be found."));
}
senderAddress = account.GetCombinedAddresses().FirstOrDefault(x => x.Address == request.Sender);
}
ulong totalFee = (request.GasPrice * request.GasLimit) + Money.Parse(request.FeeAmount);
var walletAccountReference = new WalletAccountReference(request.WalletName, request.AccountName);
byte[] serializedTxData = this.callDataSerializer.Serialize(txData);
Result <ContractTxData> deserialized = this.callDataSerializer.Deserialize(serializedTxData);
// We also want to ensure we're sending valid data: AKA it can be deserialized.
if (deserialized.IsFailure)
{
return(BuildCreateContractTransactionResponse.Failed("Invalid data. If network requires code signing, check the code contains a signature."));
}
var recipient = new Recipient {
Amount = request.Amount ?? "0", ScriptPubKey = new Script(serializedTxData)
};
var context = new TransactionBuildContext(this.network)
{
AccountReference = walletAccountReference,
TransactionFee = totalFee,
ChangeAddress = senderAddress,
SelectedInputs = selectedInputs,
MinConfirmations = MinConfirmationsAllChecks,
WalletPassword = request.Password,
Recipients = new[] { recipient }.ToList()
};
try
{
Transaction transaction = this.walletTransactionHandler.BuildTransaction(context);
uint160 contractAddress = this.addressGenerator.GenerateAddress(transaction.GetHash(), 0);
return(BuildCreateContractTransactionResponse.Succeeded(transaction, context.TransactionFee, contractAddress.ToBase58Address(this.network)));
}
catch (Exception exception)
{
return(BuildCreateContractTransactionResponse.Failed(exception.Message));
}
}
public BuildContractTransactionResult BuildTx(BuildContractTransactionRequest request)
{
Features.Wallet.Wallet wallet = this.walletManager.GetWallet(request.WalletName);
HdAccount account = wallet.GetAccount(request.AccountName);
if (account == null)
{
return(BuildContractTransactionResult.Failure(AccountNotInWalletError, $"No account with the name '{request.AccountName}' could be found."));
}
HdAddress senderAddress = account.GetCombinedAddresses().FirstOrDefault(x => x.Address == request.Sender);
if (senderAddress == null)
{
return(BuildContractTransactionResult.Failure(SenderNotInWalletError, $"The given address {request.Sender} was not found in the wallet."));
}
if (!this.CheckBalance(senderAddress.Address))
{
return(BuildContractTransactionResult.Failure(InsufficientBalanceError, SenderNoBalanceError));
}
(List <OutPoint> selectedInputs, string message) = SelectInputs(request.WalletName, request.Sender, request.Outpoints);
if (!string.IsNullOrEmpty(message))
{
return(BuildContractTransactionResult.Failure(InvalidOutpointsError, message));
}
var recipients = new List <Recipient>();
foreach (RecipientModel recipientModel in request.Recipients)
{
var bitcoinAddress = BitcoinAddress.Create(recipientModel.DestinationAddress, this.network);
// If it's a potential SC address, check if it's a contract.
if (bitcoinAddress is BitcoinPubKeyAddress bitcoinPubKeyAddress)
{
var address = new uint160(bitcoinPubKeyAddress.Hash.ToBytes());
if (this.stateRoot.IsExist(address))
{
return(BuildContractTransactionResult.Failure(TransferFundsToContractError,
$"The recipient address {recipientModel.DestinationAddress} is a contract. Transferring funds directly to a contract is not supported."));
}
}
recipients.Add(new Recipient
{
ScriptPubKey = bitcoinAddress.ScriptPubKey,
Amount = recipientModel.Amount
});
}
var context = new TransactionBuildContext(this.network)
{
AccountReference = new WalletAccountReference(request.WalletName, request.AccountName),
TransactionFee = string.IsNullOrEmpty(request.FeeAmount) ? null : Money.Parse(request.FeeAmount),
MinConfirmations = MinConfirmationsAllChecks,
Shuffle = false,
OpReturnData = request.OpReturnData,
OpReturnAmount = string.IsNullOrEmpty(request.OpReturnAmount) ? null : Money.Parse(request.OpReturnAmount),
WalletPassword = request.Password,
SelectedInputs = selectedInputs,
AllowOtherInputs = false,
Recipients = recipients,
ChangeAddress = senderAddress
};
Transaction transaction = this.walletTransactionHandler.BuildTransaction(context);
var model = new WalletBuildTransactionModel
{
Hex = transaction.ToHex(),
Fee = context.TransactionFee,
TransactionId = transaction.GetHash()
};
return(BuildContractTransactionResult.Success(model));
}