internal/

Package httperr centralises the mapping from UniRate client errors to an HTTP status code and a JSON-serialisable error body.

Package params holds the shared query-parameter parsing used by all three framework adapters, so request handling stays identical across gin, echo, and fiber.

Package unirate is a minimal vendored copy of the official UniRate Go client (github.com/UniRate-API/unirate-api-go), embedded here so the framework adapters build hermetically without resolving an unpublished module tag over the network.