HTTP code Response 200 Tetapi error 400 di Snap Flow Transaksi (Credit Card)

[threeadi]

Masalah Integrasi Midtrans Snap (Android UI Kit)

Backend Request (Snap Flow)

{
  "payment_id": "PAY_***************",
  "transaction": {
    "transaction_details": {
      "order_id": "ORDER_************",
      "gross_amount": 949050
    },
    "item_details": [
      {
        "id": "PRODUCT_********-****-****-****-************",
        "variant_id": "VARIANT_********-****-****-****-************",
        "price": 950000,
        "quantity": 1,
        "name": "HP DeskJet 2336 Printer",
        "brand": "HP",
        "category": "Elektronik",
        "merchant_name": "***"
      },
      {
        "id": "SHIPPING_************",
        "price": 10000,
        "quantity": 1,
        "name": "Ongkos Kirim - J&T Express",
        "brand": "***",
        "category": "Shipping",
        "merchant_name": "***"
      },
      {
        "id": "PLATFORM_FEE",
        "price": 100,
        "quantity": 1,
        "name": "Biaya Platform",
        "brand": "***",
        "category": "Fee",
        "merchant_name": "***"
      },
      {
        "id": "ADJUSTMENT",
        "price": -11050,
        "quantity": 1,
        "name": "Penyesuaian",
        "brand": "***",
        "category": "Adjustment",
        "merchant_name": "***"
      }
    ],
    "customer_details": {
      "first_name": "***",
      "last_name": "***",
      "email": "***@***.com",
      "phone": "62***********",
      "billing_address": {
        "first_name": "***",
        "last_name": "***",
        "email": "***@***.com",
        "phone": "62***********",
        "address": "***",
        "city": "***",
        "postal_code": "*****",
        "country_code": "IDN"
      },
      "shipping_address": {
        "first_name": "***",
        "last_name": "***",
        "email": "***@***.com",
        "phone": "62***********",
        "address": "***",
        "city": "***",
        "postal_code": "*****",
        "country_code": "IDN"
      }
    },
    "enabled_payments": ["credit_card"],
    "credit_card": {
      "save_card": false,
      "secure": true,
      "installment": {
        "required": true,
        "terms": {
          "bni": [3]
        }
      }
    },
    "expiry": {
      "start_time": "2025-**-** **:**:** +0700",
      "unit": "hours",
      "duration": 24
    }
  }
}

kode Android

  midTransKit =  UiKitApi.Builder()
            .withMerchantClientKey(if (BuildConfig.DEBUG) Constant.MIDTRANS_KEY_SANDBOX else Constant.MIDTRANS_KEY_PRODUCTION)
            //.withMerchantClientKey(Constant.MIDTRANS_KEY_PRODUCTION)
            .withContext(this@PaymentGeneralActivity)
            .withMerchantUrl(if (BuildConfig.DEBUG) Constant.MIDTRANS_MERCHANT_URL_SANDBOX else Constant.MIDTRANS_MERCHANT_URL_PRODUCTION)
            //.withMerchantUrl(Constant.MIDTRANS_MERCHANT_URL_PRODUCTION)
            .enableLog(true)
            .build()
---
 midTransKit?.startPaymentUiFlow(
                        this@PaymentGeneralActivity,
                        launcherUIKit,
                        snapToken
                    )

Hasil Debug network

Dari hasil network log Android:

• Midtrans Android UI Kit masih menggunakan API /v1/transactions
• Sedangkan Snap.js (Web) sudah menggunakan API /v2/transactions

Perbedaan versi API ini menyebabkan request dari Android ditolak dengan HTTP 400

untuk lengkap nya di file txt berikut
transaction.txt

Perbandingan dengan snap.js

Jika menggunakan snap.js (di web) sudah menggunakan api v2
https://app.sandbox.midtrans.com/snap/v2/transactions/01d4e763-a3dd-46a9-81e0-f6e7f44e02c6/charge

jika menggunakan v2, transaksi terjadi tanpa ada masalah

Kesimpulan

Root Cause

Android UI Kit (com.midtrans:uikit) masih menggunakan Transaction API v1
Payload yang dikirim backend sudah kompatibel dengan API v2
Terjadi inkompatibilitas versi API (v1 vs v2)