/// <inheritdoc /> public override async Task <IPaymentVerifyResult> VerifyAsync(InvoiceContext context, CancellationToken cancellationToken = default) { if (context == null) { throw new ArgumentNullException(nameof(context)); } var callbackResult = await MellatHelper .CrateCallbackResultAsync(_httpContextAccessor.HttpContext.Request, _messagesOptions.Value, cancellationToken) .ConfigureAwaitFalse(); if (!callbackResult.IsSucceed) { return(PaymentVerifyResult.Failed(callbackResult.Message)); } var account = await GetAccountAsync(context.Payment).ConfigureAwaitFalse(); var data = MellatHelper.CreateVerifyData(context, account, callbackResult); var responseMessage = await _httpClient .PostXmlAsync(_gatewayOptions.ApiUrl, data, cancellationToken) .ConfigureAwaitFalse(); var response = await responseMessage.Content.ReadAsStringAsync().ConfigureAwaitFalse(); var verifyResult = MellatHelper.CheckVerifyResult(response, callbackResult, _messagesOptions.Value); if (!verifyResult.IsSucceed) { return(verifyResult.Result); } data = MellatHelper.CreateSettleData(context, callbackResult, account); responseMessage = await _httpClient .PostXmlAsync(_gatewayOptions.ApiUrl, data, cancellationToken) .ConfigureAwaitFalse(); response = await responseMessage.Content.ReadAsStringAsync().ConfigureAwaitFalse(); return(MellatHelper.CreateSettleResult(response, callbackResult, _messagesOptions.Value)); }