Spaceify has adopted the so called Error-first callback standard from Node.js. In this standard callbacks have error object as their first parameter and successful response data as second. This standard is followed throughout Spaceify's APIs.

• If error occurs the error object is non-null and response data is null.
• If error does not occur the error object is null and response data contains the successful data.

Spaceify extends the standard with two optional arguments: id and ms. Spaceify has also a standard error object. Below is the complete table of arguments returned by a JSON-RPC requests and applicable methods in the JavaScript API

Examples request and callback for response.

someService.callRpc("whoAreYou", [], this, myNameIs);

function myNameIs(err, data)
  {}

someService.callRpc("howFastAreYou", [], this, youTellMe);

function youTellMe(err, data, id, ms)
  {}