Words explained
UNIX timestamp
Section titled “UNIX timestamp”The number of elapsed seconds since 00:00:00 Coordinated Universal Time (UTC), Thursday, 1 January 1970. We use it
to restrict the validity of your HMAC to a narrow time window: the timestamp must be within 60 seconds of the
current time when we receive your request, otherwise the request is rejected with 400.
Cross-origin resource sharing (CORS) is a mechanism that lets a web page request resources from another domain
than the one the page came from – in particular JavaScript fetch/XMLHttpRequest calls, which browsers otherwise
forbid by the same-origin policy. CORS defines how the browser and the server determine whether to allow the
cross-origin request. See CORS requests for how the Skyfish API
handles it.