{"service":"Alfatonics Payment Gateway","version":"1.1.0","status":"running","timestamp":"2026-04-30T23:58:11.773Z","endpoints":{"POST /api/pay/create-order":"Create payment order + trigger USSD","POST /api/pay/wallet-payment":"Trigger USSD push for existing order","GET  /api/pay/status/:orderId":"Query payment status","POST /api/pay/cancel/:orderId":"Cancel payment order","GET  /api/pay/transactions":"List all transactions (paginated)","POST /api/pay/webhook":"Selcom webhook callback"}}