public void BuildTransaction_When_OpReturnAmount_Is_Populated_Should_Add_Extra_Output_With_Data_And_Amount()
{
WalletTransactionHandlerTestContext testContext = SetupWallet();
string opReturnData = "some extra transaction info";
byte[] expectedBytes = Encoding.UTF8.GetBytes(opReturnData);
TransactionBuildContext context = CreateContext(this.Network, testContext.WalletReference, "password", testContext.DestinationKeys.PubKey.ScriptPubKey, new Money(7500), FeeType.Low, 0, opReturnData);
context.OpReturnAmount = Money.Coins(0.0001m);
Transaction transactionResult = testContext.WalletTransactionHandler.BuildTransaction(context);
IEnumerable <TxOut> unspendableOutputs = transactionResult.Outputs.Where(o => o.ScriptPubKey.IsUnspendable).ToList();
unspendableOutputs.Count().Should().Be(1);
unspendableOutputs.Single().Value.Should().Be(Money.Coins(0.0001m));
IEnumerable <Op> ops = unspendableOutputs.Single().ScriptPubKey.ToOps();
ops.Count().Should().Be(2);
ops.First().Code.Should().Be(OpcodeType.OP_RETURN);
ops.Last().PushData.Should().BeEquivalentTo(expectedBytes);
}
public void BuildTransactionNoChangeAdressesLeftCreatesNewChangeAddress()
{
WalletTransactionHandlerTestContext testContext = SetupWallet();
TransactionBuildContext context = CreateContext(this.Network, testContext.WalletReference, "password", testContext.DestinationKeys.PubKey.ScriptPubKey, new Money(7500), FeeType.Low, 0);
Transaction transactionResult = testContext.WalletTransactionHandler.BuildTransaction(context);
Transaction result = this.Network.CreateTransaction(transactionResult.ToHex());
(PubKey PubKey, BitcoinPubKeyAddress Address)expectedChangeAddressKeys = WalletTestsHelpers.GenerateAddressKeys(testContext.Wallet, testContext.AccountKeys.ExtPubKey, "1/0");
Assert.Single(result.Inputs);
Assert.Equal(testContext.AddressTransaction.Id, result.Inputs[0].PrevOut.Hash);
Assert.Equal(2, result.Outputs.Count);
TxOut output = result.Outputs[0];
Assert.Equal((testContext.AddressTransaction.Amount - context.TransactionFee - 7500), output.Value);
Assert.Equal(expectedChangeAddressKeys.Address.ScriptPubKey, output.ScriptPubKey);
output = result.Outputs[1];
Assert.Equal(7500, output.Value);
Assert.Equal(testContext.DestinationKeys.PubKey.ScriptPubKey, output.ScriptPubKey);
Assert.Equal(testContext.AddressTransaction.Amount - context.TransactionFee, result.TotalOut);
Assert.NotNull(transactionResult.GetHash());
Assert.Equal(result.GetHash(), transactionResult.GetHash());
}
public void BuildTransaction_When_OpReturnData_Is_Null_Should_Not_Add_Extra_Output()
{
WalletTransactionHandlerTestContext testContext = SetupWallet();
string opReturnData = null;
TransactionBuildContext context = CreateContext(this.Network, testContext.WalletReference, "password", testContext.DestinationKeys.PubKey.ScriptPubKey, new Money(7500), FeeType.Low, 0, opReturnData);
Transaction transactionResult = testContext.WalletTransactionHandler.BuildTransaction(context);
transactionResult.Outputs.Where(o => o.ScriptPubKey.IsUnspendable).Should()
.BeEmpty("because opReturnData is null");
}
public void BuildTransaction_When_OpReturnData_Is_Too_Long_Should_Fail_With_Helpful_Message()
{
WalletTransactionHandlerTestContext testContext = SetupWallet();
byte[] eightyOneBytes = Encoding.UTF8.GetBytes(this.costlyOpReturnData).Concat(Convert.ToByte(1));
string tooLongOpReturnString = Encoding.UTF8.GetString(eightyOneBytes);
TransactionBuildContext context = CreateContext(this.Network, testContext.WalletReference, "password", testContext.DestinationKeys.PubKey.ScriptPubKey, new Money(7500), FeeType.Low, 0, tooLongOpReturnString);
new Action(() => testContext.WalletTransactionHandler.BuildTransaction(context))
.Should().Throw <ArgumentOutOfRangeException>()
.And.Message.Should().Contain(" maximum size of 83");
}
public void EstimateFee_Without_OpReturnData_Should_Be_Less_Than_Estimate_Fee_With_Costly_OpReturnData()
{
WalletTransactionHandlerTestContext testContext = SetupWallet();
// Context with OpReturnData
TransactionBuildContext estimateContextWithOpReturn = CreateContext(this.Network, testContext.WalletReference, null, testContext.DestinationKeys.PubKey.ScriptPubKey, new Money(7500), FeeType.Low, 0, this.costlyOpReturnData);
Money feeEstimateWithOpReturn = testContext.WalletTransactionHandler.EstimateFee(estimateContextWithOpReturn);
// Context without OpReturnData
TransactionBuildContext estimateContextWithoutOpReturn = CreateContext(this.Network, testContext.WalletReference, null, testContext.DestinationKeys.PubKey.ScriptPubKey, new Money(7500), FeeType.Low, 0, null);
Money feeEstimateWithoutOpReturn = testContext.WalletTransactionHandler.EstimateFee(estimateContextWithoutOpReturn);
feeEstimateWithOpReturn.Should().NotBe(feeEstimateWithoutOpReturn);
feeEstimateWithoutOpReturn.Satoshi.Should().BeLessThan(feeEstimateWithOpReturn.Satoshi);
}
public void EstimateFee_WithLowFee_Matches_BuildTransaction_WithLowFee_With_Long_OpReturnData_added()
{
WalletTransactionHandlerTestContext testContext = SetupWallet();
// Context to build requires password in order to sign transaction.
TransactionBuildContext buildContext = CreateContext(this.Network, testContext.WalletReference, "password", testContext.DestinationKeys.PubKey.ScriptPubKey, new Money(7500), FeeType.Low, 0, this.costlyOpReturnData);
testContext.WalletTransactionHandler.BuildTransaction(buildContext);
// Context for estimate does not need password.
TransactionBuildContext estimateContext = CreateContext(this.Network, testContext.WalletReference, null, testContext.DestinationKeys.PubKey.ScriptPubKey, new Money(7500), FeeType.Low, 0, this.costlyOpReturnData);
Money feeEstimate = testContext.WalletTransactionHandler.EstimateFee(estimateContext);
feeEstimate.Should().Be(buildContext.TransactionFee);
}
public void EstimateFeeWithLowFeeMatchesBuildTxLowFee()
{
WalletTransactionHandlerTestContext testContext = SetupWallet();
// Context to build requires password in order to sign transaction.
TransactionBuildContext buildContext = CreateContext(this.Network, testContext.WalletReference, "password", testContext.DestinationKeys.PubKey.ScriptPubKey, new Money(7500), FeeType.Low, 0);
testContext.WalletTransactionHandler.BuildTransaction(buildContext);
// Context for estimate does not need password.
TransactionBuildContext estimateContext = CreateContext(this.Network, testContext.WalletReference, null, testContext.DestinationKeys.PubKey.ScriptPubKey, new Money(7500), FeeType.Low, 0);
Money fee = testContext.WalletTransactionHandler.EstimateFee(estimateContext);
Assert.Equal(fee, buildContext.TransactionFee);
}
public void Actual_Fee_Without_OpReturnData_Should_Be_Less_Than_Actual_Fee_With_Costly_OpReturnData()
{
WalletTransactionHandlerTestContext testContext = SetupWallet();
// Context with OpReturnData
TransactionBuildContext contextWithOpReturn = CreateContext(this.Network, testContext.WalletReference, "password", testContext.DestinationKeys.PubKey.ScriptPubKey, new Money(7500), FeeType.Low, 0, this.costlyOpReturnData);
testContext.WalletTransactionHandler.BuildTransaction(contextWithOpReturn);
// Context without OpReturnData
TransactionBuildContext contextWithoutOpReturn = CreateContext(this.Network, testContext.WalletReference, "password", testContext.DestinationKeys.PubKey.ScriptPubKey, new Money(7500), FeeType.Low, 0, null);
testContext.WalletTransactionHandler.BuildTransaction(contextWithoutOpReturn);
contextWithoutOpReturn.TransactionFee.Should().NotBe(contextWithOpReturn.TransactionFee);
contextWithoutOpReturn.TransactionFee.Satoshi.Should().BeLessThan(contextWithOpReturn.TransactionFee.Satoshi);
}
public void BuildTransactionUsesGivenChangeAddress()
{
WalletTransactionHandlerTestContext testContext = SetupWallet();
TransactionBuildContext context = CreateContext(this.Network, testContext.WalletReference, "password", testContext.DestinationKeys.PubKey.ScriptPubKey, new Money(7500), FeeType.Low, 0);
var key = new Key();
BitcoinPubKeyAddress address = key.PubKey.GetAddress(this.Network);
HdAddress changeAddress = context.ChangeAddress = new HdAddress
{
Index = 0,
HdPath = $"m/44'/0'/0'/0/0",
Address = address.ToString(),
Pubkey = key.PubKey.ScriptPubKey,
ScriptPubKey = address.ScriptPubKey,
//Transactions = new List<TransactionData>()
};
Transaction transactionResult = testContext.WalletTransactionHandler.BuildTransaction(context);
Transaction result = this.Network.CreateTransaction(transactionResult.ToHex());
Assert.Single(result.Inputs);
Assert.Equal(testContext.AddressTransaction.Id, result.Inputs[0].PrevOut.Hash);
Assert.Equal(2, result.Outputs.Count);
TxOut output = result.Outputs[0];
Assert.Equal((testContext.AddressTransaction.Amount - context.TransactionFee - 7500), output.Value);
Assert.Equal(changeAddress.ScriptPubKey, output.ScriptPubKey);
output = result.Outputs[1];
Assert.Equal(7500, output.Value);
Assert.Equal(testContext.DestinationKeys.PubKey.ScriptPubKey, output.ScriptPubKey);
Assert.Equal(testContext.AddressTransaction.Amount - context.TransactionFee, result.TotalOut);
Assert.NotNull(transactionResult.GetHash());
Assert.Equal(result.GetHash(), transactionResult.GetHash());
}
