public async Task <string> CallSmartContract(SmartContractTransactionParameter scTransaction)
{
if (scTransaction == null)
{
throw new ArgumentNullException(nameof(scTransaction));
}
if (scTransaction.To == null)
{
throw new ArgumentNullException(nameof(scTransaction.To));
}
var httpClient = _httpClientFactory.BuildClient();
var jParams = new JArray();
jParams.Add(scTransaction.To.ToHexString());
jParams.Add(scTransaction.From.ToHexString());
jParams.Add(scTransaction.Data.ToHexString());
jParams.Add(scTransaction.Gas);
jParams.Add(scTransaction.GasPrice);
jParams.Add(scTransaction.Value);
var jObj = new JObject();
jObj.Add("id", Guid.NewGuid().ToString());
jObj.Add("method", Constants.RpcOperations.ScCall);
jObj.Add("params", jParams);
var content = new StringContent(jObj.ToString(), System.Text.Encoding.UTF8, ContentType);
var request = new HttpRequestMessage
{
Method = HttpMethod.Post,
Content = content,
RequestUri = GetUri()
};
var response = await httpClient.SendAsync(request).ConfigureAwait(false);
var json = await response.Content.ReadAsStringAsync().ConfigureAwait(false);
string errorCode = null;
var jsonObj = JObject.Parse(json);
if (TryGetError(jsonObj, out errorCode))
{
throw new RpcException(errorCode);
}
var r = jsonObj.Value <string>("result");
if (string.IsNullOrWhiteSpace(r))
{
return(null);
}
return(r);
}
private void CallContract(object sender, EventArgs e)
{
if (_viewModel == null)
{
return;
}
var authenticatedWallet = WalletStore.Instance().GetAuthenticatedWallet();
if (authenticatedWallet == null)
{
MainWindowStore.Instance().DisplayError("You're not authenticated");
return;
}
if (_viewModel.SelectedSolidityContract == null)
{
MainWindowStore.Instance().DisplayError("Contract must be selected");
return;
}
if (_viewModel.SelectedFunctionDefinition == null)
{
MainWindowStore.Instance().DisplayError("Function must be selected");
return;
}
var callValue = _viewModel.SelectedFunctionDefinition.FunctionAgg.GetCallValue(_viewModel.SelectedFunctionDefinition.Parameters.Select(p => p.Value));
var smartContractTransactionParameter = new SmartContractTransactionParameter(_viewModel.SelectedSolidityContract.Address.FromHexString());
smartContractTransactionParameter.Data = callValue.FromHexString();
var rpcClient = new RpcClient(authenticatedWallet.Network);
rpcClient.CallSmartContract(smartContractTransactionParameter).ContinueWith((t) =>
{
try
{
var smartContractResult = t.Result;
Application.Current.Dispatcher.Invoke(() => MainWindowStore.Instance().DisplayMessage(string.Format("Result of the operation : {0}", smartContractResult)));
}
catch (AggregateException)
{
Application.Current.Dispatcher.Invoke(() => MainWindowStore.Instance().DisplayError("An error occured while trying to call the contract"));
}
});
}
