# EVM Contracts ### Contract Categories The BioDAO smart contracts are organized into several functional categories: #### 1. Token Contract * Implements an ERC20 token with role-based access controls. * Supports controlled transfers and permissioned minting. #### 2. Vesting Contracts * Manage token distribution over time with configurable schedules. * Support both direct and Merkle-based allocations. * Include optional purchasing mechanisms for vested tokens. #### 3. Airdrop Contracts * Utilize Merkle trees for efficient ERC20 token distribution. * Prevent duplicate claims while minimizing storage costs. #### 4. Security & Testing * All contracts incorporate best practices for secure Solidity development. * Thoroughly tested using Foundry with high coverage metrics. By leveraging these smart contracts, the Bio ecosystem ensures transparent, secure, and efficient token management while maintaining flexibility for future upgrades. --- # 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.bio.xyz/bio/developers/dao-setup/evm-contracts.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.