/// <summary>
/// Makes an STK Push payment request to MPESA API Server.
/// </summary>
/// <param name="lipaNaMpesaOnline">
/// Data transfer object containing properties for the Lipa Na Mpesa Online API endpoint.
/// </param>
/// <param name="accesstoken">Acccesstoken retrieved by the <c>GetAuthTokenAsync</c> method.</param>
/// <param name="mpesaRequestEndpoint">Set to <c>MpesaRequestEndpoint.LipaNaMpesaOnline</c></param>
/// <param name="cancellationToken">Cancellation Token</param>
/// <returns>A JSON string containing LNMO response data from MPESA API Server</returns>
public LipaNaMpesaOnlinePushStkResponse MakeLipaNaMpesaOnlinePayment(LipaNaMpesaOnline lipaNaMpesaOnline, string accesstoken, string mpesaRequestEndpoint, CancellationToken cancellationToken = default)
{
var validator = new LipaNaMpesaOnlineValidator();
var results = validator.Validate(lipaNaMpesaOnline);
return(!results.IsValid
? throw new MpesaAPIException(HttpStatusCode.BadRequest, string.Join(Environment.NewLine, results.Errors.Select(x => x.ErrorMessage.ToString())))
: MpesaPostRequestAsync <LipaNaMpesaOnlinePushStkResponse>(lipaNaMpesaOnline, accesstoken, mpesaRequestEndpoint, cancellationToken).GetAwaiter().GetResult());
}
private async Task ExecuteMpesaStkCommand()
{
try
{
var mpesaPayment = new LipaNaMpesaOnline
(
businessShortCode: mpesaAPIConfiguration.LNMOshortCode,
timeStamp: DateTime.Now,
transactionType: Transaction_Type.CustomerPayBillOnline,
amount: Amount,
partyA: PhoneNumber,
partyB: mpesaAPIConfiguration.LNMOshortCode,
phoneNumber: PhoneNumber,
callBackUrl: mpesaAPIConfiguration.CallBackUrl.Replace("{requestId}", Guid.NewGuid().ToString()),
accountReference: AccountReference,
transactionDescription: TransactionDescription,
passkey: mpesaAPIConfiguration.PassKey
);
var stkResults = await _mpesaClient.MakeLipaNaMpesaOnlinePaymentAsync(mpesaPayment, await RetrieveAccessToken(), MpesaRequestEndpoint.LipaNaMpesaOnline);
stkResults.PhoneNumber = PhoneNumber;
var navigationParams = new NavigationParameters();
navigationParams.Add("PushSTKResponse", JsonConvert.SerializeObject(stkResults));
await _navigationService.NavigateAsync("MpesaResultsPage", navigationParams);
}
catch (MpesaAPIException ex)
{
Device.BeginInvokeOnMainThread(() =>
{
_dialogs.Alert(new AlertConfig()
.SetMessage(ex.Message.ToString())
.SetTitle(ex.StatusCode.ToString()));
});
}
catch (Exception ex)
{
Device.BeginInvokeOnMainThread(() =>
{
_dialogs.Alert(new AlertConfig()
.SetMessage(ex.Message.ToString())
.SetTitle("Error"));
});
}
}
public async Task <IActionResult> MpesaPayment(LipaNaMpesaOnlineViewModel lipaNaMpesaOnline)
{
LipaNaMpesaOnlinePushStkResponse mpesaPaymentRequest;
try
{
#if DEBUG
var generatedCallBackUrl = _mpesaApiConfiguration.CallBackUrl.Replace("{requestId}", Guid.NewGuid().ToString());
#else
var generatedCallBackUrl = _linkGenerator.GetUriByAction(_httpContextAccessor.HttpContext,
action: nameof(APIControllers.PaymentCallbackController.LipaNaMpesaCallback),
controller: nameof(APIControllers.PaymentCallbackController).Replace("Controller", ""),
values: new { requestId = Guid.NewGuid() },
scheme: Request.Scheme);
#endif
var mpesaPayment = new LipaNaMpesaOnline
(
businessShortCode: _mpesaApiConfiguration.LNMOshortCode,
timeStamp: DateTime.Now,
transactionType: Transaction_Type.CustomerPayBillOnline,
amount: lipaNaMpesaOnline.Amount,
partyA: lipaNaMpesaOnline.PhoneNumber,
partyB: _mpesaApiConfiguration.LNMOshortCode,
phoneNumber: lipaNaMpesaOnline.PhoneNumber,
callBackUrl: generatedCallBackUrl,
accountReference: lipaNaMpesaOnline.AccountReference,
transactionDescription: lipaNaMpesaOnline.TransactionDesc,
passkey: _mpesaApiConfiguration.PassKey
);
mpesaPaymentRequest = await _mpesaClient.MakeLipaNaMpesaOnlinePaymentAsync(mpesaPayment, await RetrieveAccessToken(), MpesaRequestEndpoint.LipaNaMpesaOnline);
}
catch (MpesaAPIException ex)
{
_logger.LogError(ex, ex.Message);
return(View().WithDanger("Error", ex.Message));
}
var pushStkResponse = mpesaPaymentRequest;
pushStkResponse.PhoneNumber = lipaNaMpesaOnline.PhoneNumber;
return(RedirectToAction(nameof(ShowMpesaResult), pushStkResponse).WithInfo("Info", "Please wait for confirmation message to arrive on your phone."));
}
