# Drag-n-Drop GameFi modules **Developers could form their own GameFi smart contracts by drag-n-drop pre-built smart contract functions** Rollin.Games specializes in all the effective and feasible GameFi mechanisms, and transforms them into composable smart contracts. Developers can immediately integrate the pre-built GameFi smart contracts with existing game mechanisms to quickly build in-game economic models of GameFi. **Game Data Oracle: Handling the communication between blockchain and games** Rollin.Games game data oracle acts as a data source that can be fed bi-directional between smart contracts and game data, from sending game data to the blockchain to record game results, to calculating game rewards on smart contracts. Enabling real-time communication and making sure the state changing in-game are correct and synchronous with blockchain. --- # 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://rollin-games.gitbook.io/rollin.games/solutions/gamefi-lego/drag-n-drop-gamefi-modules.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.