private static ECDsa loadECDSAFromPrivateKey(AccountPrivateKey privateKey)
{
var ecparams = new ECParameters();
ecparams.Curve = ECCurve.NamedCurves.nistP256;
var ecPoint = new ECPoint();
ecPoint.X = XConvert.GetECBytesFromBigInteger(privateKey.X);
ecPoint.Y = XConvert.GetECBytesFromBigInteger(privateKey.Y);
ecparams.Q = ecPoint;
ecparams.D = XConvert.GetECBytesFromBigInteger(privateKey.D);
return(ECDsa.Create(ecparams));
}
private static ECDsa loadECDSAFromPublicKey(AccountPublicKey publicKey)
{
var param = new ECParameters
{
Curve = ECCurve.NamedCurves.nistP256,
Q = new ECPoint
{
X = XConvert.GetECBytesFromBigInteger(publicKey.X),
Y = XConvert.GetECBytesFromBigInteger(publicKey.Y),
},
};
return(ECDsa.Create(param));
}
private Pb.CommonReply PostTx(string bcname, Transaction tx)
{
var pbtx = XConvert.LocalTxToPbTx(tx);
var reqTx = new Pb.TxStatus
{
Txid = pbtx.Txid,
Tx = pbtx,
Bcname = bcname,
};
var postRes = client.PostTx(reqTx);
if (postRes.Header.Error != Pb.XChainErrorEnum.Success)
{
Console.WriteLine("post tx failed, txid=" + tx.Txid + " err=" + (int)postRes.Header.Error);
return(null);
}
return(postRes);
}
// Query a block with block id
/// <summary>Query a block with block id</summary>
/// <param name="bcname">the name of blockchain</param>
/// <param name="blockid">block id</param>
/// <return>the request response, the <c>Data</c> field is a Block type</return>
public Response QueryBlock(string bcname, string blockid)
{
var req = new Pb.BlockID
{
Header = GetDefaultHeader(),
Bcname = bcname,
Blockid = ByteString.CopyFrom(XConvert.HexStringToByteArray(blockid)),
NeedContent = true,
};
var res = client.GetBlock(req);
if (res.Header.Error != Pb.XChainErrorEnum.Success)
{
Console.WriteLine("query block failed. errcode=" + (int)res.Header.Error +
", logid=" + req.Header.Logid);
return(MakeErrorResponse(ErrorCode.ConnectFailed, null));
}
var block = XConvert.PbBlockToLocalBlock(res);
return(MakeResponse("", block));
}
// Transfer given amount of UTXO resource to another address
/// <summary>Transfer given amount of UTXO resource to another address</summary>
/// <param name="bcname">the name of the blockchain</param>
/// <param name="to">the receiver address</param>
/// <param name="amount">the amount of UTXO resource</param>
/// <param name="desc">addtional information attached to this transaction</param>
/// <return>the response contains the Txid of this transaction</return>
public Response Transfer(string bcname, string to, BigInteger amount, string desc)
{
var response = new Response()
{
Error = new XChainError()
{
ErrorCode = ErrorCode.Success,
ErrorMessage = "Success",
}
};
if (string.IsNullOrEmpty(bcname) || string.IsNullOrEmpty(to))
{
return(MakeErrorResponse(ErrorCode.ParamError, null));
}
var utxo = SelectUTXO(bcname, this.Account.Address, this.Account.PublicKey, amount);
if (utxo == null)
{
Console.WriteLine("Select utxo failed");
return(MakeErrorResponse(ErrorCode.SelectUTXOError, null));
}
var tx = AssembleTx(utxo, this.Account, null, to, amount, null, desc);
if (tx == null)
{
Console.WriteLine("AssembleTx failed");
return(MakeErrorResponse(ErrorCode.UnknownError, null));
}
// post transaction
var postRes = PostTx(bcname, tx);
if (postRes == null || postRes.Header.Error != Pb.XChainErrorEnum.Success)
{
Console.WriteLine("InvokeContract: PostTx failed");
return(MakeErrorResponse(ErrorCode.PostError, null));
}
response.Txid = XConvert.ByteArrayToHexString(tx.Txid).ToLower();
return(response);
}
// Invokes contract method with given args
// TODO: multisig is not supported
/// <summary>Invokes contract method with given args.
/// TODO: multisig is not supported</summary>
/// <param name="bcname">the name of blockchain</param>
/// <param name="contractName">the name of contract to invoke</param>
/// <param name="method">the method name of contract to invoke</param>
/// <param name="args">the arguments of contract</param>
/// <param name="authRequire">add more address if multisig needed, otherwise keep null</param>
/// <param name="contractType">the contract VM type, default to WASM</param>
/// <param name="desc">description info, default to empty</param>
public Response InvokeContract(string bcname, string contractName, string method,
SortedDictionary <string, byte[]> args, List <string> authRequire = null, string desc = "",
ContactVMType.Type contractType = ContactVMType.Type.WASM)
{
if (string.IsNullOrEmpty(bcname) || string.IsNullOrEmpty(method))
{
return(MakeErrorResponse(ErrorCode.ParamError, null));
}
// pre-execute contract
var execRes = PreExecWithSelectUTXO(bcname, this.Account.Address,
this.Account.PrivateKey, 0, contractName, method, args, contractType,
this.Account.Address, authRequire);
if (execRes == null)
{
Console.WriteLine("InvokeContract: PreExecWithSelectUTXO failed");
return(MakeErrorResponse(ErrorCode.PostError, null));
}
// check contract response
var contractResult = new Dictionary <string, string>();
for (var i = 0; i < execRes.Response.Responses.Count; i++)
{
if (execRes.Response.Responses[i].Status >= 400)
{
Console.WriteLine("Contract execute failed. res=" +
JsonConvert.SerializeObject(execRes.Response.Responses[i]));
return(new Response
{
Error = new XChainError
{
ErrorCode = ErrorCode.Success,
ErrorMessage = "Success",
},
});
}
contractResult.Add(execRes.Response.Requests[i].ContractName + ":" + execRes.Response.Requests[i].MethodName,
Encoding.ASCII.GetString(execRes.Response.Responses[i].Body.ToByteArray()));
}
// assemble transaction
var tx = AssembleTx(execRes.UtxoOutput, this.Account, authRequire, "", 0, execRes.Response, desc);
if (tx == null)
{
Console.WriteLine("InvokeContract: AssembleTx failed");
return(MakeErrorResponse(ErrorCode.UnknownError, null));
}
// post transaction
var postRes = PostTx(bcname, tx);
if (postRes == null || postRes.Header.Error != Pb.XChainErrorEnum.Success)
{
Console.WriteLine("InvokeContract: PostTx failed");
return(MakeErrorResponse(ErrorCode.PostError, null));
}
var res = new Response
{
Error = new XChainError
{
ErrorCode = ErrorCode.Success,
},
Txid = XConvert.ByteArrayToHexString(tx.Txid),
Data = contractResult,
};
return(res);
}