public async Task <decimal> BalanceOfAsync(string contractAddress, ITronAccount ownerAccount)
{
var contractAddressBytes = Base58Encoder.DecodeFromBase58Check(contractAddress);
var ownerAddressBytes = Base58Encoder.DecodeFromBase58Check(ownerAccount.Address);
var wallet = _walletClient.GetProtocol();
var functionABI = ABITypedRegistry.GetFunctionABI <BalanceOfFunction>();
try
{
var addressBytes = new byte[20];
Array.Copy(ownerAddressBytes, 1, addressBytes, 0, addressBytes.Length);
var addressBytesHex = "0x" + addressBytes.ToHex();
var balanceOf = new BalanceOfFunction {
Owner = addressBytesHex
};
var decimals = GetDecimals(wallet, contractAddressBytes);
var encodedHex = new FunctionCallEncoder().EncodeRequest(balanceOf, functionABI.Sha3Signature);
var trigger = new TriggerSmartContract
{
ContractAddress = ByteString.CopyFrom(contractAddressBytes),
OwnerAddress = ByteString.CopyFrom(ownerAddressBytes),
Data = ByteString.CopyFrom(encodedHex.HexToByteArray()),
};
var transactionExtention = await wallet.TriggerConstantContractAsync(trigger, headers : _walletClient.GetHeaders());
if (!transactionExtention.Result.Result)
{
throw new Exception(transactionExtention.Result.Message.ToStringUtf8());
}
if (transactionExtention.ConstantResult.Count == 0)
{
throw new Exception($"result error, ConstantResult length=0.");
}
var result = new FunctionCallDecoder().DecodeFunctionOutput <BalanceOfFunctionOutput>(transactionExtention.ConstantResult[0].ToByteArray().ToHex());
var balance = Convert.ToDecimal(result.Balance);
if (decimals > 0)
{
balance /= Convert.ToDecimal(Math.Pow(10, decimals));
}
return(balance);
}
catch (Exception ex)
{
_logger.LogError(ex, ex.Message);
throw;
}
}
public async Task <string> TransferAsync(string contractAddress, ITronAccount ownerAccount, string toAddress, decimal amount, string memo, long feeLimit)
{
var contractAddressBytes = Base58Encoder.DecodeFromBase58Check(contractAddress);
var callerAddressBytes = Base58Encoder.DecodeFromBase58Check(toAddress);
var ownerAddressBytes = Base58Encoder.DecodeFromBase58Check(ownerAccount.Address);
var wallet = _walletClient.GetProtocol();
var functionABI = ABITypedRegistry.GetFunctionABI <TransferFunction>();
try
{
var contract = await wallet.GetContractAsync(new BytesMessage
{
Value = ByteString.CopyFrom(contractAddressBytes),
}, headers : _walletClient.GetHeaders());
var toAddressBytes = new byte[20];
Array.Copy(callerAddressBytes, 1, toAddressBytes, 0, toAddressBytes.Length);
var toAddressHex = "0x" + toAddressBytes.ToHex();
var decimals = GetDecimals(wallet, contractAddressBytes);
var tokenAmount = amount;
if (decimals > 0)
{
tokenAmount = amount * Convert.ToDecimal(Math.Pow(10, decimals));
}
var trc20Transfer = new TransferFunction
{
To = toAddressHex,
TokenAmount = Convert.ToInt64(tokenAmount),
};
var encodedHex = new FunctionCallEncoder().EncodeRequest(trc20Transfer, functionABI.Sha3Signature);
var trigger = new TriggerSmartContract
{
ContractAddress = ByteString.CopyFrom(contractAddressBytes),
OwnerAddress = ByteString.CopyFrom(ownerAddressBytes),
Data = ByteString.CopyFrom(encodedHex.HexToByteArray()),
};
var transactionExtention = await wallet.TriggerConstantContractAsync(trigger, headers : _walletClient.GetHeaders());
if (!transactionExtention.Result.Result)
{
_logger.LogWarning($"[transfer]transfer failed, message={transactionExtention.Result.Message.ToStringUtf8()}.");
return(null);
}
var transaction = transactionExtention.Transaction;
if (transaction.Ret.Count > 0 && transaction.Ret[0].Ret == Transaction.Types.Result.Types.code.Failed)
{
return(null);
}
transaction.RawData.Data = ByteString.CopyFromUtf8(memo);
transaction.RawData.FeeLimit = feeLimit;
var transSign = _transactionClient.GetTransactionSign(transaction, ownerAccount.PrivateKey);
var result = await _transactionClient.BroadcastTransactionAsync(transSign);
return(transSign.GetTxid());
}
catch (Exception ex)
{
_logger.LogError(ex, ex.Message);
return(null);
}
}