# Closed-Loop Tokens Closed-loop tokens are digital currencies that operate exclusively within a specific ecosystem. Because they cannot be traded externally, their value stays stable and tied directly to in-game use, creating a predictable and player-friendly economy. **Koju** In Warped Universe, Koju functions as a closed-loop currency used solely for purchasing cosmetics and Nexus Passes. It behaves like any standard in-game currency. All transactions are handled seamlessly in the background, so players never need to interact with wallets or approve transactions manually. This keeps the in-game economy stable and familiar regardless of what is happening in broader markets, while still giving us the infrastructure benefits of running it on the Sui Network. --- # 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://wp.warped.games/sui-network/closed-loop-tokens.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.