# Randomness There are apps in the Glow ecosystem that require a **trusted and verifiable source of randomness** to function properly. An example of this is the Glow Lotto. In Glow Lotto, we are using the most decentralized and verifiable source of randomness available in the Terra ecosystem: [Terrand](https://docs.terrand.dev/). Terrand, co-built by the CosmWasm and the Loterra team, uses CosmWasm smart contracts to act as a relayer of [drand](https://drand.love/), one of the most secure and recognised random number generators on the Internet. Drand is supported by the League of Entropy, a council initiated by Protocol Labs and constituted by reputable institutions such as Cloudflare, the Ethereum Foundation and the UCL. Combining a non-predictable, bias-resistant and verifiable source of randomness such as drand and the decentralized censorship of smart contracts, Terrand guarantees the fairness and security of any random number used in Glow apps. --- # 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.glowyield.com/glow-yield/smart-contracts/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.