This repository is the official Mollie API client for Node.js (TypeScript), providing a typed SDK for integrating with the Mollie payment platform. It exposes a factory function `createMollieClient()` that returns an object with resource binders (e.g., `payments`, `orders`, `customers`, `refunds`, `settlements`), each offering CRUD operations and additional actions like cancellation or refunding. The architecture follows a clean layered design: resource-specific binders delegate to a shared `TransformingNetworkClient` that handles HTTP requests, response transformation, pagination, idempotency keys, retries, and throttling. Data models are separated into raw API interfaces and sealed helper-enriched types, with embedded/linked resource access abstracted through helper classes. The SDK supports both API key and OAuth authentication, callback-style and Promise-based APIs, and includes extensive test suites (unit, integration, and cross-runtime compatibility for Node, Bun, and Deno). The codebase is well-structured, uses modern TypeScript features, and includes a custom iteration API for paginated resources. Notable internal patterns include a generic Binder base class, parameter default injection, a throttling utility, and a rich set of type utilities (Maybe, Nullable, Seal, Xor).