public void ValidateTransactionSignature_will_pass_with_valid_transaction_signature()
{
var subbedLogger = Substitute.For <ILogger>();
var cryptoContext = new FfiWrapper();
var transactionValidator = new TransactionValidator(subbedLogger, cryptoContext);
// build a valid transaction
var privateKey = cryptoContext.GeneratePrivateKey();
var validTransaction = new PublicEntry
{
SenderAddress = privateKey.GetPublicKey().Bytes.ToByteString()
};
var signingContext = new SigningContext
{
NetworkType = NetworkType.Devnet,
SignatureType = SignatureType.TransactionPublic
};
var signature = new Signature
{
// sign an actual TransactionBroadcast object
RawBytes = cryptoContext.Sign(privateKey, validTransaction.ToByteArray(), signingContext.ToByteArray())
.SignatureBytes.ToByteString(),
SigningContext = signingContext
};
validTransaction.Signature = signature;
var result = transactionValidator.ValidateTransaction(validTransaction);
result.Should().BeTrue();
}
private byte[] PrepareEd25519PrecompileCall(HashProvider hashProvider, FfiWrapper cryptoContext, IPrivateKey signingPrivateKey, IPrivateKey otherPrivateKey)
{
var data = Encoding.UTF8.GetBytes("Testing testing 1 2 3");
var message = hashProvider.ComputeMultiHash(data).Digest;
var signingContext = Encoding.UTF8.GetBytes("Testing testing 1 2 3 context");
var context = hashProvider.ComputeMultiHash(signingContext).Digest;
ISignature signature = cryptoContext.Sign(signingPrivateKey, message, context);
var signatureBytes = signature.SignatureBytes;
var publicKeyBytes = otherPrivateKey.GetPublicKey().Bytes;
// below verify check is not needed but allows for greater confidence for any person in the future
// that would approach and debug test when it goes wrong
// =====================================================
cryptoContext.Verify(signature, message, context)
.Should().BeTrue("signature generated with private key should verify with corresponding public key");
// =====================================================
// save message hash in memory at position 0x00
string pushToMemoryAt0 = "7f" + message.ToHexString(false) + "600052";
// save first 32 bytes of the sig in memory starting from position 0x20
string pushToMemoryAt32 = "7f" + signatureBytes.AsSpan(0, 32).ToHexString(false) + "602052";
// save remaining 32 bytes of the sig in memory starting from position 0x40
string pushToMemoryAt64 = "7f" + signatureBytes.AsSpan(32, 32).ToHexString(false) + "604052";
// save context bytes in memory starting from position 0x60 (but this should be changed if context is smaller)
string pushToMemoryAt96 = "7f" + context.ToHexString(false) + "606052";
// save public key bytes in memory starting from position 0x80 (but this should be changed if context is smaller)
string pushToMemoryAt128 = "7f" + publicKeyBytes.ToHexString(false) + "608052";
// address of the precompile within Catalyst
string addressCode = GetEd25519PrecompileAddressAsHex();
var byteCode = Bytes.FromHexString(
pushToMemoryAt0 +
pushToMemoryAt32 +
pushToMemoryAt64 +
pushToMemoryAt96 +
pushToMemoryAt128 +
// PUSH1 32 PUSH1 0 PUSH1 160 PUSH1 0 PUSH20 address GAS STATICCALL
// make a call to precompile and pass [0,160) bytes of memory as an input
// and store result at [0,1) of memory array
// allow precompile to use all the gas required
"6001600060a0600073" +
addressCode +
"45fa00");
TestContext.WriteLine(byteCode.ToHexString());
return(byteCode);
}
