create($attempt->gateway_reference, $attempt->amount_bdt, $attempt->method); // return redirect()->away($link['checkout_url']); // Client checks gateway origin/path. // In a scheduled reconciliation command: // $status=$gateway->status($attempt->gateway_reference,$attempt->amount_bdt,$attempt->method); // DB::transaction(function() use($orderId,$status,$attempt) { // $order=Order::whereKey($orderId)->lockForUpdate()->firstOrFail(); // Re-check order status and the immutable attempt total/method/reference before any write. // If status is verified and the order is still eligible, save TrxID and mark Paid once. // Use a UNIQUE local provider+TrxID constraint and an outbox for emails/fulfilment. // }); // Model and field names depend on the client's website. This file does not create public routes.