# EIP-2535 Diamond The Beanstalk contract is a Diamond – a multi-facet proxy defined in [EIP-2535](https://eips.ethereum.org/EIPS/eip-2535) that can implement functionality from numerous different Facet contracts. All the Facets share a common storage through the [`AppStorage`](https://dev.to/mudgen/appstorage-pattern-for-state-variables-in-solidity-3lki) pattern. Functionality is shared between Facets through internal Libraries. Understanding EIP-2535 really helps to understand Beanstalk. This page serves as a resource hub for EIP-2535. #### What is a Diamond? * [EIP-2535](https://eips.ethereum.org/EIPS/eip-2535) * [Understanding Diamonds on Ethereum](https://dev.to/mudgen/understanding-diamonds-on-ethereum-1fb) * [How Diamond Upgrades Work](https://dev.to/mudgen/how-diamond-upgrades-work-417j) #### Implementation Tips for Diamonds (which Beanstalk uses) * [AppStorage Pattern for State Variables in Solidity](https://dev.to/mudgen/appstorage-pattern-for-state-variables-in-solidity-3lki) * [How to Share Functions Between Facets of a Diamond](https://dev.to/mudgen/how-to-share-functions-between-facets-of-a-diamond-1njb) * [Accessing State Variables in Libraries](https://dev.to/mudgen/solidity-libraries-can-t-have-state-variables-oh-yes-they-can-3ke9) #### Why use a Diamond? * [Ethereum's Maximum Contract Size Limit is Solved with the Diamond Standard](https://dev.to/mudgen/ethereum-s-maximum-contract-size-limit-is-solved-with-the-diamond-standard-2189) * [🌱 Beanstalk 🤝 EIP-2535 💎](https://publius.money/blog/2021-09-24-beanstalk-eip-2535) * [Ethereum Diamonds Solve These Problems](https://dev.to/mudgen/ethereum-diamonds-solve-these-problems-3fmp) #### More Information on Diamonds * [Beanstalk on Louper, The Ethereum Diamond Inspector](https://louper.dev/diamond/0xc1e088fc1323b20bcbee9bd1b9fc9546db5624c5) * [EIP-2535 Diamonds Discord](https://discord.gg/kQewPw2) * [Nick Mudge <> Publius Podcast](https://www.youtube.com/watch?v=3-RUl12lPnI) --- # 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.bean.money/developers/overview/eip-2535-diamond.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.