My Laravel-based PHP site currently takes service payments through Razorpay; I now need that gateway swapped out for PayU. All existing pricing logic, order tables, and user flows must stay as they are—only the payment processor is changing. What I’ll hand over to you: • PayU sandbox and production credentials • Current Razorpay controller, routes, and JS that drive the checkout pop-up What I expect back: • Clean PayU integration that mirrors the present Razorpay experience (popup or redirect flow, whichever you recommend) • Proper signature generation, success/failure/cancel callbacks, and secure server-side verification • Order/service record updates on payment status change • Clear error handling and user messages • Successful transactions demonstrated first in sandbox, then live Please keep the code modular so future gateway changes are painless and add concise setup notes so I can redeploy on staging or production without hand-holding.