fix kbz payment success payload

app-modules/payment/src/Gateways/KbzMiniAppGateway.php

@@ -114,13 +114,19 @@ class KbzMiniAppGateway implements PaymentGatewayInterface
             );
         }
 
+        $orderInfo = $this->createOrderInfo($body['prepay_id'] ?? '');
+
         return new PaymentResultData(
             // KBZ's queryorder/refund calls both key off our own merch_order_id,
             // not their prepay_id — so that's what gets stored/passed forward as
             // the gateway transaction id (prepay_id still lives in the payload).
             status: PaymentStatus::Pending,
             gatewayTransactionId: $data->merchantOrderId,
-            gatewayPayload: $body,
+            gatewayPayload: [
+                'prepayId' => $body['prepay_id'] ?? null,
+                'orderInfo' => KbzSignature::joinKeyVal($orderInfo),
+                'signature' => KbzSignature::sign($orderInfo, $this->merchantKey),
+            ],
         );
     }
 
@@ -239,7 +245,7 @@ class KbzMiniAppGateway implements PaymentGatewayInterface
             'timestamp' => (string) now()->timestamp,
             'method' => 'kbz.payment.precreate',
             'notify_url' => $data->notifyUrl ?? $this->notifyUrl,
-            'nonce_str' => $this->nonceStr(),
+            'nonce_str' => uniqid(),
             'version' => '1.0',
             'biz_content' => [
                 'appid' => $this->appId,
@@ -266,7 +272,7 @@ class KbzMiniAppGateway implements PaymentGatewayInterface
         $params = [
             'timestamp' => (string) now()->timestamp,
             'method' => 'kbz.payment.queryorder',
-            'nonce_str' => $this->nonceStr(),
+            'nonce_str' => uniqid(),
             'version' => '1.0',
             'biz_content' => [
                 'appid' => $this->appId,
@@ -303,7 +309,7 @@ class KbzMiniAppGateway implements PaymentGatewayInterface
         $params = [
             'timestamp' => (string) now()->timestamp,
             'method' => 'kbz.payment.refund',
-            'nonce_str' => $this->nonceStr(),
+            'nonce_str' => uniqid(),
             'version' => '1.0',
             'biz_content' => [
                 'appid' => $this->appId,
@@ -329,18 +335,6 @@ class KbzMiniAppGateway implements PaymentGatewayInterface
         return now()->format('YmdHi').strtoupper(Str::random(8));
     }
 
-    /**
-     * KBZ requires `nonce_str` to be a plain alphanumeric string of at most
-     * 32 characters — no hyphens or other special characters (confirmed
-     * against KBZ's "Query Order" field spec). `Str::uuid()` violates both
-     * constraints (36 chars, hyphenated), which silently broke `precreate`
-     * downstream even though the request's own signature still validated.
-     */
-    private function nonceStr(): string
-    {
-        return strtoupper(Str::random(32));
-    }
-
     /**
      * mTLS options for the refund call — KBZ requires a client cert/key +
      * CA bundle on `kbz.payment.refund` specifically (domain.md §6).
@@ -369,4 +363,15 @@ class KbzMiniAppGateway implements PaymentGatewayInterface
 
         return $options;
     }
+
+    public function createOrderInfo($prepayId): array
+    {
+        return [
+            'appid' => $this->appId,
+            'merch_code' => $this->merchantCode,
+            'nonce_str' => uniqid(),
+            'prepay_id' => $prepayId,
+            'timestamp' => (string)time()
+        ];
+    }
 }

app-modules/payment/src/Http/Controllers/PaymentController.php

@@ -8,6 +8,7 @@ use Illuminate\Routing\Controller;
 use Illuminate\Support\Facades\Gate;
 use Modules\Booking\Models\Booking;
 use Modules\Payment\Actions\InitiatePaymentAction;
+use Modules\Payment\Enums\PaymentStatus;
 use Modules\Payment\Http\Resources\PaymentResource;
 
 class PaymentController extends Controller
@@ -26,6 +27,15 @@ class PaymentController extends Controller
 
         $payment = $this->initiatePaymentAction->handle($booking);
 
+        if ($payment->status === PaymentStatus::Failed) {
+            return response()->json([
+                'message' => 'Payment initiation failed',
+                'errors' => [
+                    'payment' => ['Payment initiation failed'],
+                ],
+            ], 422);
+        }
+
         return (new PaymentResource($payment))
             ->response()
             ->setStatusCode(201);