opencashier-merchant-integration
Integrate an external merchant system, SaaS backend, or business application with the OpenCashier Merchant API. Use when a non-OpenCashier codebase needs to create orders, redirect users to `cashierUrl`, verify OpenCashier notifications, query orders as a fallback, add refunds, or optionally bootstrap provider config. For Node/TypeScript, default to the official SDK. For other stacks, port the signing and verification protocol.
development
