public void ShouldSignTransaction() { // Act var signedTransactionHex = service.SignTransaction(tx, spentCoins, new[] { fromKey }); var signedTx = Transaction.Parse(signedTransactionHex); // Assert Assert.True(new TransactionBuilder() .AddCoins(spentCoins) .SetTransactionPolicy(new StandardTransactionPolicy { CheckFee = false }) .Verify(signedTx, out var errors)); }