payment-development
Development guide for @rytass/payments base package (支付基底套件開發指南). Use when creating new payment adapters (新增支付 adapter), understanding base interfaces, or extending payment functionality. Covers PaymentGateway, Order, BindCardPaymentGateway interfaces and implementation patterns for Taiwan payment providers (台灣金流服務提供商). Keywords - payment adapter, 支付 adapter, gateway, order lifecycle, 訂單生命週期, card binding, 卡片綁定, credit card, 信用卡, virtual account, ATM 虛擬帳號, CVS payment, 超商代碼, event emitter, 事件監聽