feat: enhance payment logging and debugging in BillingService and Pay…

payment-service/src/main/java/com/techtorque/payment_service/service/impl/BillingServiceImpl.java

@@ -315,6 +315,13 @@ public List<ScheduledPaymentResponseDto> getScheduledPaymentsForCustomer(String
   public PaymentInitiationResponseDto initiatePayHerePayment(PaymentInitiationDto dto) {
     log.info("Initiating PayHere payment for invoice: {}", dto.getInvoiceId());
 
+    // Log payment details for debugging
+    log.info("Payment Details - Merchant ID: {}, Order ID: {}, Amount: {}, Currency: {}",
+        payHereConfig.getMerchantId(),
+        dto.getInvoiceId(),
+        dto.getAmount(),
+        dto.getCurrency());
+
     // Generate payment hash using utility method
     String hash = PayHereHashUtil.generatePaymentHash(
         payHereConfig.getMerchantId(),
@@ -324,7 +331,7 @@ public PaymentInitiationResponseDto initiatePayHerePayment(PaymentInitiationDto
         payHereConfig.getMerchantSecret()
     );
 
-    log.info("PayHere payment hash generated for order: {}", dto.getInvoiceId());
+    log.info("PayHere payment hash generated: {} for order: {}", hash, dto.getInvoiceId());
 
     // Build response with all PayHere required parameters
     PaymentInitiationResponseDto response = new PaymentInitiationResponseDto();

payment-service/src/main/java/com/techtorque/payment_service/util/PayHereHashUtil.java

@@ -54,18 +54,25 @@ public static String generatePaymentHash(
             // Try to decode as Base64
             byte[] decodedBytes = Base64.getDecoder().decode(merchantSecret);
             decodedSecret = new String(decodedBytes);
+            System.out.println("DEBUG: Merchant secret was Base64 encoded, decoded successfully");
         } catch (IllegalArgumentException e) {
             // If decoding fails, use as-is (it's already plain text)
             decodedSecret = merchantSecret;
+            System.out.println("DEBUG: Merchant secret is plain text (not Base64)");
         }
 
         // Step 1: Hash the merchant secret
         String hashedSecret = getMd5(decodedSecret);
+        System.out.println("DEBUG: Hashed secret: " + hashedSecret);
 
         // Step 2: Concatenate: merchant_id + order_id + amount + currency + hashed_secret
         String concatenated = merchantId + orderId + formattedAmount + currency + hashedSecret;
+        System.out.println("DEBUG: Hash input string: " + concatenated);
 
         // Step 3: Hash the concatenated string
-        return getMd5(concatenated);
+        String finalHash = getMd5(concatenated);
+        System.out.println("DEBUG: Final hash: " + finalHash);
+
+        return finalHash;
     }
 }

payment-service/src/main/resources/application.properties

@@ -21,7 +21,7 @@ spring.profiles.active=${SPRING_PROFILE:dev}
 # http://localhost:8086/swagger-ui/index.html
 
 # PayHere Payment Gateway Configuration (Sandbox)
-# Domain: techtorque
+# Domain: techtorque.randitha.net
 payhere.merchant.id=${PAYHERE_MERCHANT_ID:1231968}
 payhere.merchant.secret=${PAYHERE_MERCHANT_SECRET:MjE0Mzc0NzgxMjEzMDE1NzYxNzE1NDIzNzA1MTIzMDI2NTc1ODQw}
 payhere.sandbox=${PAYHERE_SANDBOX:true}