private Witness WitnessFor(Transaction tx, KeyPair key)
{
return(new Witness()
{
InvocationScript = ("40" + tx.Sign(key).ToHexString()).HexToBytes(),
VerificationScript = (key.AsSignatureScript()).HexToBytes()
});
}
public bool CallContract(KeyPair key, string scriptHash, byte[] bytes, out byte[] txhash)
{
var inputs = new List <CoinReference>();
var outputs = new List <TransactionOutput>();
decimal gasCost = 0;
if (key != null)
{
var unspent = GetUnspent(key.AsAddress(), UInt256.Zero);
if (!unspent.ContainsKey("CRON"))
{
throw new RpcException(-3227, "No CRONs available");
}
var sources = unspent["CRON"];
decimal selectedGas = 0;
foreach (var src in sources)
{
selectedGas += src.value;
var input = new CoinReference()
{
PrevHash = UInt256.Parse(src.txid),
PrevIndex = (ushort)src.index,
};
inputs.Add(input);
if (selectedGas >= gasCost)
{
break;
}
}
if (selectedGas < gasCost)
{
throw new RpcException(-3228, "Not enough CRONs available");
}
var targetAssetID = reverseHex(ASSET_CRON).HexToBytes();
if (selectedGas > gasCost)
{
var left = selectedGas - gasCost;
var change = new TransactionOutput()
{
AssetId = new UInt256(targetAssetID),
ScriptHash = key.AsSignatureScript().HexToBytes().ToScriptHash(),
Value = Fixed8.FromDecimal(left)
};
outputs.Add(change);
}
}
InvocationTransaction tx = new InvocationTransaction()
{
Attributes = new TransactionAttribute[0],
Version = 0,
Script = bytes,
Gas = Fixed8.FromDecimal(gasCost),
Inputs = inputs.ToArray(),
Outputs = outputs.ToArray()
};
if (key == null)
{
return(CallNoInvoke(tx, out txhash));
}
txhash = tx.Hash.ToArray().Reverse().ToArray();
return(SignAndRelay(tx, new[] { key }));
}