private static string GetPayload(JObject webhookBody, string timestamp)
{
var signaturePayload = new SignaturePayload
{
ContentType = "application/json",
XTLWebhookTimestamp = timestamp,
Body = webhookBody,
};
return(JsonConvert.SerializeObject(signaturePayload, Formatting.None));
}
public void ConstructorProducesUnsignedSignatureRequest()
{
// Arrange
var testData = GenerateTestData();
var hash = HashAlgorithm.Create(Signature.DefaultDigestAlgorithmName).ComputeHash(testData);
// Act
var sigreq = new Signature(
SignaturePayload.Compute(
"testdata",
testData,
Signature.DefaultDigestAlgorithmName));
// Assert
Assert.Equal("testdata", sigreq.Payload.ContentIdentifier);
Assert.Equal(hash, sigreq.Payload.Digest);
Assert.Equal(1, sigreq.Payload.Version);
Assert.Equal("2.16.840.1.101.3.4.2.1", sigreq.Payload.DigestAlgorithm.Value); // sha256 OID
}
public async Task <string> Sign(IEnclaveKey key, object value)
{
using (var client = KeyVault.CreateClient())
using (var sha = SHA256.Create())
{
var kvKey = key.RetrieveKey <JsonWebKey>();
var hashed = sha.ComputeHash(Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(value)));
var result = await client.SignAsync(kvKey.Kid, JsonWebKeySignatureAlgorithm.RS256, hashed);
var signed = new SignaturePayload
{
Val = value,
Dig = hashed,
Kid = result.Kid,
Sig = result.Result,
};
return(Convert.ToBase64String(Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(signed))));
}
}
private string ExtrinsicQueryString(byte[] encodedMethodBytes, string module, string method, Address sender, string privateKey)
{
_logger.Info("=== Started Invoking Extrinsic ===");
// Get account Nonce
var nonce = GetAccountNonce(sender);
var compactNonce = Scale.EncodeCompactInteger(nonce);
_logger.Info($"sender nonce: {nonce}");
byte[] mmBuf = new byte[3];
// Module + Method
var absoluteIndex = _protocolParams.Metadata.GetModuleIndex(module, false);
mmBuf[0] = (byte)_protocolParams.Metadata.GetModuleIndex(module, true);
mmBuf[1] = (byte)_protocolParams.Metadata.GetCallMethodIndex(absoluteIndex, method);
// Address separator
mmBuf[2] = Consts.ADDRESS_SEPARATOR;
Extrinsic ce = new Extrinsic();
var completeMessage = new byte[encodedMethodBytes.Length + 3];
mmBuf.CopyTo(completeMessage.AsMemory());
encodedMethodBytes.CopyTo(completeMessage.AsMemory(3));
// memcpy(completeMessage + 3, encodedMethodBytes, encodedMethodBytesSize);
ce.Signature.Version = Consts.SIGNATURE_VERSION;
var senderPK = _protocolParams.Metadata.GetPublicKeyFromAddr(sender);
ce.Signature.SignerPublicKey = senderPK.Bytes;
ce.Signature.Nonce = nonce;
ce.Signature.Era = ExtrinsicEra.IMMORTAL_ERA;
// Format signature payload
SignaturePayload sp = new SignaturePayload();
sp.Nonce = nonce;
sp.MethodBytesLength = encodedMethodBytes.Length + 3;
sp.MethodBytes = completeMessage;
sp.Era = ExtrinsicEra.IMMORTAL_ERA;
sp.AuthoringBlockHash = _protocolParams.GenesisBlockHash;
// Serialize and Sign payload
var signaturePayloadBytes = new byte[Consts.MAX_METHOD_BYTES_SZ];
long payloadLength = sp.SerializeBinary(ref signaturePayloadBytes);
var secretKeyVec = Converters.StringToByteArray(privateKey);
var message = signaturePayloadBytes.AsMemory().Slice(0, (int)payloadLength).ToArray();
var sig = Sr25519v011.SignSimple(ce.Signature.SignerPublicKey, secretKeyVec, message);
ce.Signature.Sr25519Signature = sig;
// Copy signature bytes to transaction
ce.Signature.Sr25519Signature = sig;
var length = Consts.DEFAULT_FIXED_EXSTRINSIC_SIZE + encodedMethodBytes.Length + compactNonce.Length - 1;
var compactLength = Scale.EncodeCompactInteger(length);
/////////////////////////////////////////
// Serialize message signature and write to buffer
long writtenLength = 0;
var buf = new byte[2048];
var buf2 = new List <byte>();
// Length
writtenLength += Scale.WriteCompactToBuf(compactLength, ref buf, writtenLength);
// Signature version
buf[writtenLength++] = ce.Signature.Version;
// Address separator
buf[writtenLength++] = Consts.ADDRESS_SEPARATOR;
// Signer public key
ce.Signature.SignerPublicKey.CopyTo(buf.AsMemory((int)writtenLength));
writtenLength += Consts.SR25519_PUBLIC_SIZE;
// SR25519 Signature
ce.Signature.Sr25519Signature.CopyTo(buf.AsMemory((int)writtenLength));
writtenLength += Consts.SR25519_SIGNATURE_SIZE;
// Nonce
writtenLength += Scale.WriteCompactToBuf(compactNonce, ref buf, writtenLength);
// Extrinsic Era
buf[writtenLength++] = (byte)ce.Signature.Era;
// Serialize and send transaction
var teBytes = new byte[Consts.MAX_METHOD_BYTES_SZ];
teBytes = buf;
completeMessage.AsMemory().CopyTo(teBytes.AsMemory((int)writtenLength));
long teByteLength = writtenLength + encodedMethodBytes.Length + 3;
return($"0x{Converters.ByteArrayToString(teBytes, (int)teByteLength)}");
}
public string SignAndSendTransfer(string sender, string privateKey, string recipient, BigInteger amount, Action <string> callback)
{
_logger.Info("=== Starting a Transfer Extrinsic ===");
// Get account Nonce
var address = new Address {
Symbols = sender
};
var nonce = GetAccountNonce(address);
_logger.Info($"sender nonce: {nonce} ");
// Format transaction
TransferExtrinsic te = new TransferExtrinsic();
te.Method.ModuleIndex = _protocolParams.BalanceModuleIndex;
te.Method.MethodIndex = _protocolParams.TransferMethodIndex;
var recipientPK = _protocolParams.Metadata.GetPublicKeyFromAddr(new Address(recipient));
te.Method.ReceiverPublicKey = recipientPK.Bytes;
te.Method.Amount = amount;
te.Signature.Version = Consts.SIGNATURE_VERSION;
var senderPK = _protocolParams.Metadata.GetPublicKeyFromAddr(new Address(sender));
te.Signature.SignerPublicKey = senderPK.Bytes;
te.Signature.Nonce = nonce;
te.Signature.Era = ExtrinsicEra.IMMORTAL_ERA;
// Format signature payload
SignaturePayload sp = new SignaturePayload();
sp.Nonce = nonce;
var methodBytes = new byte[Consts.MAX_METHOD_BYTES_SZ];
sp.MethodBytesLength = (int)te.SerializeMethodBinary(ref methodBytes);
sp.MethodBytes = methodBytes;
sp.Era = ExtrinsicEra.IMMORTAL_ERA;
sp.AuthoringBlockHash = _protocolParams.GenesisBlockHash;
// Serialize and Sign payload
var signaturePayloadBytes = new byte[Consts.MAX_METHOD_BYTES_SZ];
long payloadLength = sp.SerializeBinary(ref signaturePayloadBytes);
byte[] secretKeyVec = Converters.StringToByteArray(privateKey);
var message = signaturePayloadBytes.AsMemory().Slice(0, (int)payloadLength).ToArray();
var sig = Sr25519v011.SignSimple(te.Signature.SignerPublicKey, secretKeyVec, message);
te.Signature.Sr25519Signature = sig;
// Serialize and send transaction
var teBytes = new byte[Consts.MAX_METHOD_BYTES_SZ];
long teByteLength = te.SerializeBinary(ref teBytes);
string teStr = $"0x{Converters.ByteArrayToString(teBytes, (int)teByteLength)}";
var query = new JObject {
{ "method", "author_submitAndWatchExtrinsic" }, { "params", new JArray {
teStr
} }
};
// Send == Subscribe callback to completion
return(Subscribe(query, (json) =>
{
callback(json.ToString());
}));
}
