internal/

Package activation implements the billing-domain stages of the paid-order activation saga: the recharge wallet credit, the referral commission and the final settlement.

Package adminorder implements the admin-side order management subdomain of the billing module.

Package adminpayment implements the payment-method management subdomain of the billing module.

Package callbacks implements the payment gateway callback subdomain of the billing module: it authenticates EPay/Stripe/Alipay/Cryptomus notifications, verifies them against the order's immutable payment expectation, re-confirms with the gateway and settles the payment.

Package checkout implements the user-facing money flows of the billing module: purchase, renewal, traffic reset, recharge, order preview and close.

Package coupon implements the coupon management subdomain of the billing module.

Package orderaudit writes the durable audit record created alongside an order.

Package portal implements the guest storefront subdomain of the billing module: guest pre-orders, gateway/balance checkout, order status polling with session exchange, and the public plan/payment listings.

Package settle holds the one settlement primitive shared by the checkout and payment-callback subdomains: marking a gateway-verified payment as paid and enqueueing activation.

Package userorder implements the user-facing order query subdomain of the billing module (the checkout flows join as migration proceeds).

Package v2 implements the V2 order orchestration subdomain of the billing module: idempotent create-and-checkout, guest checkout capabilities and the SSE event-stream tickets.

Package wallet implements the user-facing wallet subdomain of the billing module: commission withdrawal, balance/commission statements and the affiliate earnings overview.