/// <summary>
/// Builds a transaction to transfer funds on a smart contract network.
/// </summary>
/// <param name="request">An object containing the necessary parameters to build the transaction.</param>
/// <returns></returns>
public void BuildTransaction(BuildContractTransactionRequest request)
{
var path = "/api/SmartContracts/build-transaction";
path = path.Replace("{format}", "json");
var queryParams = new Dictionary <String, String>();
var headerParams = new Dictionary <String, String>();
var formParams = new Dictionary <String, String>();
var fileParams = new Dictionary <String, FileParameter>();
String postBody = null;
postBody = ApiClient.Serialize(request); // http body (model) parameter
// authentication setting, if any
String[] authSettings = new String[] { };
// make the HTTP request
IRestResponse response = (IRestResponse)ApiClient.CallApi(path, Method.POST, queryParams, postBody, headerParams, formParams, fileParams, authSettings);
if (((int)response.StatusCode) >= 400)
{
throw new ApiException((int)response.StatusCode, "Error calling BuildTransaction: " + response.Content, response.Content);
}
else if (((int)response.StatusCode) == 0)
{
throw new ApiException((int)response.StatusCode, "Error calling BuildTransaction: " + response.ErrorMessage, response.ErrorMessage);
}
return;
}
public void BuildTransferContext_SenderHasNoBalance_Fails()
{
string senderAddress = uint160.Zero.ToBase58Address(this.network);
SmartContractTransactionService service = new SmartContractTransactionService(
this.network,
this.walletManager.Object,
this.walletTransactionHandler.Object,
this.stringSerializer.Object,
this.callDataSerializer.Object,
this.addressGenerator.Object,
this.stateRepository.Object);
var request = new BuildContractTransactionRequest
{
AccountName = "account 0",
WalletName = "wallet",
Password = "******",
Sender = senderAddress,
};
this.walletManager.Setup(x => x.GetWallet(request.WalletName))
.Returns(new Features.Wallet.Wallet
{
AccountsRoot = new List <AccountRoot>
{
new AccountRoot
{
Accounts = new List <HdAccount>
{
new HdAccount
{
ExternalAddresses = new List <HdAddress>
{
new HdAddress
{
Address = senderAddress
}
},
Name = request.AccountName,
}
}
}
}
});
this.walletManager.Setup(x => x.GetAddressBalance(request.Sender))
.Returns(new AddressBalance {
Address = request.Sender, AmountConfirmed = 0, AmountUnconfirmed = 0
});
BuildContractTransactionResult result = service.BuildTx(request);
Assert.Equal(SmartContractTransactionService.InsufficientBalanceError, result.Error);
Assert.NotNull(result.Message);
Assert.Null(result.Response);
}
public void BuildTransferContext_SenderHasNoBalance_Fails()
{
string senderAddress = uint160.Zero.ToBase58Address(this.network);
var reserveUtxoService = new ReserveUtxoService(this.loggerFactory, new Mock <ISignals>().Object);
var service = new SmartContractTransactionService(
this.network,
this.walletManager.Object,
this.walletTransactionHandler.Object,
this.stringSerializer.Object,
this.callDataSerializer.Object,
this.addressGenerator.Object,
this.stateRepository.Object,
reserveUtxoService,
this.blockStore.Object,
this.chainIndexer,
this.primitiveSerializer.Object,
this.contractAssemblyCache.Object,
this.receiptRepository.Object);
var request = new BuildContractTransactionRequest
{
AccountName = "account 0",
WalletName = "wallet",
Password = "******",
Sender = senderAddress,
};
var wallet = new Features.Wallet.Wallet();
wallet.AccountsRoot.Add(new AccountRoot(wallet));
var account0 = new HdAccount(wallet.AccountsRoot.First().Accounts)
{
Name = request.AccountName
};
account0.ExternalAddresses.Add(new HdAddress()
{
Address = senderAddress
});
this.walletManager.Setup(x => x.GetWallet(request.WalletName))
.Returns(wallet);
this.walletManager.Setup(x => x.GetAddressBalance(request.Sender))
.Returns(new AddressBalance {
Address = request.Sender, AmountConfirmed = 0, AmountUnconfirmed = 0
});
BuildContractTransactionResult result = service.BuildTx(request);
Assert.Equal(SmartContractTransactionService.InsufficientBalanceError, result.Error);
Assert.NotNull(result.Message);
Assert.Null(result.Response);
}
public void BuildTransferContext_AccountNotInWallet_Fails()
{
string senderAddress = uint160.Zero.ToBase58Address(this.network);
SmartContractTransactionService service = new SmartContractTransactionService(
this.network,
this.walletManager.Object,
this.walletTransactionHandler.Object,
this.stringSerializer.Object,
this.callDataSerializer.Object,
this.addressGenerator.Object,
this.stateRepository.Object);
var request = new BuildContractTransactionRequest
{
AccountName = "account 0",
WalletName = "wallet",
Password = "******",
Sender = senderAddress,
};
// Create a wallet but without the correct account name
this.walletManager.Setup(x => x.GetWallet(request.WalletName))
.Returns(new Features.Wallet.Wallet
{
AccountsRoot = new List <AccountRoot>
{
new AccountRoot
{
Accounts = new List <HdAccount>
{
new HdAccount
{
ExternalAddresses = new List <HdAddress>(),
Name = "account 1"
}
}
}
}
});
BuildContractTransactionResult result = service.BuildTx(request);
Assert.Equal(SmartContractTransactionService.AccountNotInWalletError, result.Error);
Assert.NotNull(result.Message);
Assert.Null(result.Response);
}
public void BuildTransferContext_AccountNotInWallet_Fails()
{
string senderAddress = uint160.Zero.ToBase58Address(this.network);
var reserveUtxoService = new ReserveUtxoService(this.loggerFactory, new Mock <ISignals>().Object);
var service = new SmartContractTransactionService(
this.network,
this.walletManager.Object,
this.walletTransactionHandler.Object,
this.stringSerializer.Object,
this.callDataSerializer.Object,
this.addressGenerator.Object,
this.stateRepository.Object,
reserveUtxoService,
this.blockStore.Object,
this.chainIndexer,
this.primitiveSerializer.Object,
this.contractAssemblyCache.Object,
this.receiptRepository.Object);
var request = new BuildContractTransactionRequest
{
AccountName = "account 0",
WalletName = "wallet",
Password = "******",
Sender = senderAddress,
};
var wallet = new Features.Wallet.Wallet();
wallet.AccountsRoot.Add(new AccountRoot(wallet));
var account0 = new HdAccount(wallet.AccountsRoot.First().Accounts)
{
Name = "account 1"
};
// Create a wallet but without the correct account name
this.walletManager.Setup(x => x.GetWallet(request.WalletName))
.Returns(wallet);
BuildContractTransactionResult result = service.BuildTx(request);
Assert.Equal(SmartContractTransactionService.AccountNotInWalletError, result.Error);
Assert.NotNull(result.Message);
Assert.Null(result.Response);
}
public IActionResult BuildTransaction([FromBody] BuildContractTransactionRequest request)
{
if (!this.ModelState.IsValid)
{
return(ModelStateErrors.BuildErrorResponse(this.ModelState));
}
try
{
BuildContractTransactionResult result = this.smartContractTransactionService.BuildTx(request);
return(this.Json(result.Response));
}
catch (Exception e)
{
this.logger.LogError("Exception occurred: {0}", e.ToString());
return(ErrorHelpers.BuildErrorResponse(HttpStatusCode.BadRequest, e.Message, e.ToString()));
}
}
public void BuildTransferContextCorrectly()
{
const int utxoIndex = 0;
uint256 utxoId = uint256.Zero;
uint256 utxoIdUnused = uint256.One;
string senderAddress = uint160.Zero.ToBase58Address(this.network);
string recipientAddress = uint160.One.ToBase58Address(this.network);
string changeAddress = new uint160(2).ToBase58Address(this.network);
var amount = 1234.567M;
var request = new BuildContractTransactionRequest
{
AccountName = "account 0",
FeeAmount = "0.01",
WalletName = "wallet",
Password = "******",
Sender = senderAddress,
ShuffleOutputs = true,
AllowUnconfirmed = true,
ChangeAddress = changeAddress,
Recipients = new List <RecipientModel>
{
// In locales that use a , for the decimal point this would fail to be parsed unless we use the invariant culture
new RecipientModel {
Amount = amount.ToString(CultureInfo.InvariantCulture), DestinationAddress = recipientAddress
}
}
};
var reserveUtxoService = new ReserveUtxoService(this.loggerFactory, new Mock <ISignals>().Object);
var service = new SmartContractTransactionService(
this.network,
this.walletManager.Object,
this.walletTransactionHandler.Object,
this.stringSerializer.Object,
this.callDataSerializer.Object,
this.addressGenerator.Object,
this.stateRepository.Object,
reserveUtxoService);
var senderHdAddress = new HdAddress {
Address = senderAddress
};
var wallet = new Features.Wallet.Wallet();
wallet.AccountsRoot.Add(new AccountRoot(wallet));
var account0 = new HdAccount(wallet.AccountsRoot.First().Accounts)
{
Name = request.AccountName
};
account0.ExternalAddresses.Add(new HdAddress()
{
Address = senderAddress
});
this.walletManager.Setup(x => x.GetWallet(request.WalletName))
.Returns(wallet);
this.walletManager.Setup(x => x.GetAddressBalance(request.Sender))
.Returns(new AddressBalance {
Address = request.Sender, AmountConfirmed = Money.FromUnit(amount, MoneyUnit.BTC), AmountUnconfirmed = 0
});
var outputs = new List <UnspentOutputReference>
{
new UnspentOutputReference
{
Address = new HdAddress
{
Address = senderAddress
},
Transaction = new TransactionData
{
Id = utxoId,
Index = utxoIndex,
}
}, new UnspentOutputReference
{
Address = new HdAddress
{
Address = senderAddress
},
Transaction = new TransactionData
{
Id = utxoIdUnused,
Index = utxoIndex,
}
}
};
this.walletManager.Setup(x => x.GetSpendableTransactionsInWallet(It.IsAny <string>(), 0)).Returns(outputs);
this.walletTransactionHandler.Setup(x => x.BuildTransaction(It.IsAny <TransactionBuildContext>()))
.Returns(new Transaction());
BuildContractTransactionResult result = service.BuildTx(request);
// Check that the transaction builder is invoked, and that we:
// - Ignore shuffleOutputs,
// - Set inputs from sender
// - Set recipients,
// - Set change to sender
this.walletTransactionHandler.Verify(w => w.BuildTransaction(It.Is <TransactionBuildContext>(context =>
context.AllowOtherInputs == false &&
context.Shuffle == false &&
context.SelectedInputs.All(i => outputs.Select(o => o.Transaction.Id).Contains(i.Hash)) &&
context.Recipients.Single().Amount == Money.FromUnit(amount, MoneyUnit.BTC) &&
context.ChangeAddress.Address == senderHdAddress.Address
)));
}
public void BuildTransferContext_RecipientIsKnownContract_Fails()
{
const int utxoIndex = 0;
uint256 utxoId = uint256.Zero;
uint256 utxoIdUnused = uint256.One;
string senderAddress = uint160.Zero.ToBase58Address(this.network);
string recipientAddress = uint160.One.ToBase58Address(this.network);
var reserveUtxoService = new ReserveUtxoService(this.loggerFactory, new Mock <ISignals>().Object);
var service = new SmartContractTransactionService(
this.network,
this.walletManager.Object,
this.walletTransactionHandler.Object,
this.stringSerializer.Object,
this.callDataSerializer.Object,
this.addressGenerator.Object,
this.stateRepository.Object,
reserveUtxoService);
var request = new BuildContractTransactionRequest
{
AccountName = "account 0",
WalletName = "wallet",
Password = "******",
Sender = senderAddress,
Recipients = new List <RecipientModel>
{
new RecipientModel {
Amount = "1", DestinationAddress = recipientAddress
}
}
};
var wallet = new Features.Wallet.Wallet();
wallet.AccountsRoot.Add(new AccountRoot(wallet));
var account0 = new HdAccount(wallet.AccountsRoot.First().Accounts)
{
Name = request.AccountName
};
account0.ExternalAddresses.Add(new HdAddress()
{
Address = senderAddress
});
this.walletManager.Setup(x => x.GetWallet(request.WalletName))
.Returns(wallet);
this.walletManager.Setup(x => x.GetAddressBalance(request.Sender))
.Returns(new AddressBalance {
Address = request.Sender, AmountConfirmed = 10, AmountUnconfirmed = 0
});
this.walletManager.Setup(x => x.GetSpendableTransactionsInWallet(It.IsAny <string>(), 0))
.Returns(new List <UnspentOutputReference>
{
new UnspentOutputReference
{
Address = new HdAddress
{
Address = senderAddress
},
Transaction = new TransactionData
{
Id = utxoId,
Index = utxoIndex,
}
}, new UnspentOutputReference
{
Address = new HdAddress
{
Address = senderAddress
},
Transaction = new TransactionData
{
Id = utxoIdUnused,
Index = utxoIndex,
}
}
});
this.stateRepository.Setup(s => s.IsExist(It.IsAny <uint160>())).Returns(true);
BuildContractTransactionResult result = service.BuildTx(request);
Assert.Equal(SmartContractTransactionService.TransferFundsToContractError, result.Error);
Assert.NotNull(result.Message);
Assert.Null(result.Response);
}
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 = this.SelectInputs(request.WalletName, request.Sender, request.Outpoints);
if (!selectedInputs.Any())
{
return(BuildContractTransactionResult.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(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));
}
public void BuildTransferContext_Recipient_Is_Not_P2PKH()
{
const int utxoIndex = 0;
uint256 utxoId = uint256.Zero;
uint256 utxoIdUnused = uint256.One;
string senderAddress = uint160.Zero.ToBase58Address(this.network);
string changeAddress = new uint160(2).ToBase58Address(this.network);
// This is a valid non-P2PKH address on CirrusTest.
string recipientAddress = "xH1GHWVNKwdebkgiFPtQtM4qb3vrvNX2Rg";
var cirrusNetwork = CirrusNetwork.NetworksSelector.Testnet();
var amount = 1234.567M;
var request = new BuildContractTransactionRequest
{
AccountName = "account 0",
FeeAmount = "0.01",
WalletName = "wallet",
Password = "******",
Sender = senderAddress,
ShuffleOutputs = true,
AllowUnconfirmed = true,
ChangeAddress = changeAddress,
Recipients = new List <RecipientModel>
{
new RecipientModel {
Amount = amount.ToString(), DestinationAddress = recipientAddress
}
}
};
SmartContractTransactionService service = new SmartContractTransactionService(
cirrusNetwork,
this.walletManager.Object,
this.walletTransactionHandler.Object,
this.stringSerializer.Object,
this.callDataSerializer.Object,
this.addressGenerator.Object,
this.stateRepository.Object);
var senderHdAddress = new HdAddress {
Address = senderAddress
};
this.walletManager.Setup(x => x.GetWallet(request.WalletName))
.Returns(new Features.Wallet.Wallet
{
AccountsRoot = new List <AccountRoot>
{
new AccountRoot
{
Accounts = new List <HdAccount>
{
new HdAccount
{
ExternalAddresses = new List <HdAddress>
{
senderHdAddress
},
Name = request.AccountName,
}
}
}
}
});
this.walletManager.Setup(x => x.GetAddressBalance(request.Sender))
.Returns(new AddressBalance {
Address = request.Sender, AmountConfirmed = Money.FromUnit(amount, MoneyUnit.BTC), AmountUnconfirmed = 0
});
var outputs = new List <UnspentOutputReference>
{
new UnspentOutputReference
{
Address = new HdAddress
{
Address = senderAddress
},
Transaction = new TransactionData
{
Id = utxoId,
Index = utxoIndex,
}
}, new UnspentOutputReference
{
Address = new HdAddress
{
Address = senderAddress
},
Transaction = new TransactionData
{
Id = utxoIdUnused,
Index = utxoIndex,
}
}
};
this.walletManager.Setup(x => x.GetSpendableTransactionsInWallet(It.IsAny <string>(), 0)).Returns(outputs);
this.walletTransactionHandler.Setup(x => x.BuildTransaction(It.IsAny <TransactionBuildContext>()))
.Returns(new Transaction());
BuildContractTransactionResult result = service.BuildTx(request);
// Check that the transaction builder is invoked, and that we:
// - Ignore shuffleOutputs,
// - Set inputs from sender
// - Set recipients,
// - Set change to sender
this.walletTransactionHandler.Verify(w => w.BuildTransaction(It.Is <TransactionBuildContext>(context =>
context.AllowOtherInputs == false &&
context.Shuffle == false &&
context.SelectedInputs.All(i => outputs.Select(o => o.Transaction.Id).Contains(i.Hash)) &&
context.Recipients.Single().Amount == Money.FromUnit(amount, MoneyUnit.BTC) &&
context.ChangeAddress == senderHdAddress
)));
}