private uint CreateContext()
{
Logger.Debug("Init context");
uint context = 0;
using (var configStr = new TonString(_serializer.Serialize(Config)))
{
var result = Interop.tc_create_context(configStr.ToStruct());
if (result == IntPtr.Zero)
{
Logger.Error("Init context returned null");
throw new TonClientException($"{nameof(Interop.tc_create_context)} returned null");
}
var json = Interop.tc_read_string(result).ToString();
Logger.Debug($"Init context returned JSON: {json}");
Interop.tc_destroy_string(result);
var token = JObject.Parse(json);
if (token.TryGetValue("result", out var contextToken))
{
Logger.Debug($"Init context succeeded: {contextToken}");
context = contextToken.Value <uint>();
}
else
{
if (token.TryGetValue("error", out var errorToken))
{
Logger.Debug($"throwing exception with error {errorToken}");
throw TonClientException.FromJson(errorToken.Value <JToken>());
}
else
{
Logger.Debug($"throwing exception with the returned JSON: {json}");
throw TonClientException.FromJson(json);
}
}
}
return(context);
}
private async Task <string> GetJsonResponse <TC>(string functionName, object @params, Func <TC, int, Task> callback = null)
{
var functionParamsJson = @params != null
? _serializer.Serialize(@params)
: "";
Logger.Debug($"Calling function {functionName} with parameters {functionParamsJson}");
// GCHandle to store reference to the native callback handler.
// This is to avoid native handler being garbage collected while waiting
// for result from the native lib.
var callbackHandle = default(GCHandle);
var tcs = new TaskCompletionSource <string>();
var handler = new Interop.tc_response_handler_t((requestId, json_str, type, finished) =>
{
try
{
var json = json_str.ToString();
Logger.Debug($"{functionName} status update: {type} ({json})");
if (type == (int)Interop.tc_response_types_t.tc_response_success)
{
tcs.SetResult(json);
}
else if (type == (int)Interop.tc_response_types_t.tc_response_error)
{
tcs.SetException(TonClientException.FromJson(json));
}
else if (type == (int)Interop.tc_response_types_t.tc_response_nop)
{
// TODO: ???
}
else
{
if (callback != null)
{
var value = _serializer.Deserialize <TC>(json);
callback.Invoke(value, (int)type); // TODO: call Wait here?
}
}
}
finally
{
if (finished && callbackHandle.IsAllocated)
{
callbackHandle.Free();
}
}
});
callbackHandle = GCHandle.Alloc(handler);
using (var fNameStr = new TonString(functionName))
{
using (var fParamsStr = new TonString(functionParamsJson))
{
Interop.tc_request(_context, fNameStr.ToStruct(), fParamsStr.ToStruct(), 1, handler);
}
}
return(await tcs.Task);
}