// Initialize XChainClient, must call this method after XChainClient instance created.
/// <summary>Initialize XChainClient, must call this method after XChainClient instance created.</summary>
/// <param name="keypath">the folder contains user's address and private key</param>
/// <param name="targetHost">the GRPC endpoint of xuperchain node, e.g. 127.0.0.1:37101</param>
/// <returns>the balance of given address</returns>
public bool Init(string keypath, string targetHost)
{
try
{
AppContext.SetSwitch(SwitchName, true);
var channel = GrpcChannel.ForAddress("http://" + targetHost);
this.client = new Pb.Xchain.XchainClient(channel);
this.account = new XCAccount();
return(SetAccountByPath(keypath));
}
catch (Exception e)
{
Console.WriteLine("Init failed, err=" + e.ToString());
return(false);
}
}
private Transaction AssembleTx(Pb.UtxoOutput utxo, XCAccount account, List <string> authRequire,
string to, BigInteger amount, Pb.InvokeResponse contractInvoke, string desc)
{
var tx = new Transaction();
// check param
if (amount < 0 || account == null)
{
return(null);
}
// if have utxo, assemble utxo input/ouput
if (utxo != null)
{
// assemble TxInputs
tx.TxInputs = new List <TxInput>();
var total = BigInteger.Parse(utxo.TotalSelected);
for (var i = 0; i < utxo.UtxoList.Count; i++)
{
var utxoItem = utxo.UtxoList[i];
var input = new TxInput
{
FromAddr = utxoItem.ToAddr.ToByteArray(),
Amount = utxoItem.Amount.ToByteArray(),
RefTxid = utxoItem.RefTxid.ToByteArray(),
RefOffset = utxoItem.RefOffset,
};
tx.TxInputs.Add(input);
}
tx.TxOutputs = new List <TxOutput>();
// Assemble utxo Output for transferring to
if (amount > 0 && to != "")
{
// utxo check
if (amount > total)
{
Console.WriteLine("Utxo use greater than utxo selected" + ", selected=" + total + ", use=", amount);
return(null);
}
var output = new TxOutput()
{
ToAddr = Encoding.ASCII.GetBytes(to),
Amount = amount.ToByteArray(),
};
Array.Reverse(output.Amount, 0, output.Amount.Length);
tx.TxOutputs.Add(output);
total -= amount;
}
// Assemble contract fee
if (contractInvoke != null && contractInvoke.GasUsed > 0)
{
var gasUsed = new BigInteger(contractInvoke.GasUsed);
if (gasUsed > total)
{
Console.WriteLine("Utxo use greater than utxo selected" + ", selected=" + total + ", use=", gasUsed);
return(null);
}
var output = new TxOutput()
{
ToAddr = Encoding.ASCII.GetBytes("$"),
Amount = gasUsed.ToByteArray(),
};
Array.Reverse(output.Amount, 0, output.Amount.Length);
tx.TxOutputs.Add(output);
total -= gasUsed;
}
// charge utxo to user
if (total > 0)
{
var chargeOutput = new TxOutput()
{
ToAddr = Encoding.ASCII.GetBytes(account.Address),
Amount = total.ToByteArray(),
};
Array.Reverse(chargeOutput.Amount, 0, chargeOutput.Amount.Length);
tx.TxOutputs.Add(chargeOutput);
}
}
// Assemble contracts
if (contractInvoke != null)
{
if (contractInvoke.Inputs.Count > 0)
{
tx.TxInputsExt = new List <TxInputExt>();
}
if (contractInvoke.Outputs.Count > 0)
{
tx.TxOutputsExt = new List <TxOutputExt>();
}
if (contractInvoke.Requests.Count > 0)
{
tx.ContractRequests = new List <InvokeRequest>();
}
// TODO: transfer within contract is not supported
foreach (var input in contractInvoke.Inputs)
{
var inputExt = new TxInputExt
{
Bucket = input.Bucket,
Key = input.Key.ToByteArray(),
RefTxid = input.RefTxid.ToByteArray(),
RefOffset = input.RefOffset,
};
tx.TxInputsExt.Add(inputExt);
}
foreach (var output in contractInvoke.Outputs)
{
var outputExt = new TxOutputExt
{
Bucket = output.Bucket,
Key = output.Key.ToByteArray(),
Value = output.Value.ToByteArray(),
};
tx.TxOutputsExt.Add(outputExt);
}
foreach (var request in contractInvoke.Requests)
{
var invoke = new InvokeRequest
{
ModuleName = request.ModuleName,
ContractName = request.ContractName,
MethodName = request.MethodName,
};
foreach (var arg in request.Args)
{
invoke.Args.Add(arg.Key, arg.Value.ToByteArray());
}
foreach (var limit in request.ResourceLimits)
{
invoke.ResourceLimits.Add(new ResourceLimit
{
Type = (ResourceType)limit.Type,
Limit = limit.Limit,
});
}
tx.ContractRequests.Add(invoke);
}
}
// Assemble other data
tx.Desc = Encoding.ASCII.GetBytes(desc);
tx.Version = 1;
tx.Coinbase = false;
tx.Autogen = false;
tx.Initiator = account.Address;
if (authRequire != null && authRequire.Count > 0)
{
tx.AuthRequire = authRequire;
}
var digestHash = XDigest.MakeDigestHash(tx);
var sign = XCrypto.SignHash(account.PrivateKey, digestHash);
var signInfo = new SignatureInfo()
{
PublicKey = account.PublicKey.RawKey,
Sign = sign,
};
tx.InitiatorSigns = new List <SignatureInfo>();
tx.InitiatorSigns.Add(signInfo);
if (authRequire != null && authRequire.Count > 0)
{
tx.AuthRequireSigns = new List <SignatureInfo>();
tx.AuthRequireSigns.Add(signInfo);
}
var txid = XDigest.MakeTransactionID(tx);
tx.Txid = txid;
return(tx);
}