# On-chain Randomness Catddle Game uses two mechanisms to ensure the on-chain randomness. One from Catddle Labs and the other from ChainLink VRF. The default random generator is the Catddle Labs version, which will be much cheaper and faster. Users can also opt for ChainLink VRF. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://docs.catddle.com/technology/on-chain-randomness.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.