Added logging to endpoint

MidrandBooksApi/Payments/Payfast/PayfastConfirmationEndpoint.cs

@@ -16,7 +16,8 @@ public sealed class PayfastConfirmationEndpoint : IEndpoint
     public void Map(IEndpointRouteBuilder builder)
     {
         builder.MapPost("payments/payfast/confirm", async (HttpRequest request, PayfastService payfastService,
-            IJobOrchestrator jobOrchestrator, IConfiguration configuration, IHostEnvironment hostEnvironment, CancellationToken cancellationToken) =>
+            IJobOrchestrator jobOrchestrator, IConfiguration configuration, IHostEnvironment hostEnvironment,
+            ILogger<PayfastConfirmationEndpoint> logger, CancellationToken cancellationToken) =>
         {
             using Activity? activity = PaymentActivitySource.StartActivity("ReceivePayfastWebhook", ActivityKind.Server);
 
@@ -39,7 +40,11 @@ public sealed class PayfastConfirmationEndpoint : IEndpoint
             var signatureCheck = PayfastService.GenerateSignature(paramDictionary, passphrase);
 
             if (signatureCheck.IsFailed || !string.Equals(signatureCheck.Value, incomingSignature, StringComparison.OrdinalIgnoreCase))
+            {
+                logger.LogCritical("Incoming sugnature failed validation: {signature}, {errors}", incomingSignature, signatureCheck.Errors.Select(e => e.Message).ToList());
+
                 return Results.Unauthorized();
+            }
 
             var formPairs = formCollection.Select(kvp => $"{kvp.Key}={HttpUtility.UrlEncode(kvp.Value.ToString())}");
 
@@ -50,7 +55,11 @@ public sealed class PayfastConfirmationEndpoint : IEndpoint
             var serverConfirmation = await payfastService.ValidateServerConfirmationAsync(rawQueryParamString, isSandbox, cancellationToken);
 
             if (serverConfirmation.IsFailed || !serverConfirmation.Value)
+            {
+                logger.LogCritical("Server confirmation failed: {rawstring}, {errors}", rawQueryParamString, serverConfirmation.Errors.Select(e => e.Message).ToList());
+
                 return Results.Unauthorized();
+            }
 
             var notification = PayfastPaymentConfirmationReceivedEvent.Create(payload, payload.MerchantPaymentId!,
                 allowLoopback: !hostEnvironment.IsProduction(), performBackgroundChecks: false);