websocket data types in on message

When we subscribe to data what are these type which we get on message:

{ type: 'cn', s: 'ok', message: 'successful', code: 200 }

{ type: 'sub', s: 'ok', message: 'successful', code: 200 }

{ type: 'sub', s: 'ok', message: 'successful', code: 200 }

{ type: 'cp', s: 'ok', message: 'successful', code: 200 }

{ type: 'cr', s: 'ok', message: 'successful', code: 200 }