# Contracts deployments ### Deployment requirements To follow this guide, you must have the following installed: * [nodejs >= v12.x & npm >= 6.x](https://nodejs.org/en/) * [yarn >= 1.x](https://classic.yarnpkg.com/lang/en/docs/install/) ### Set up the local environment At first, you have to pull the [mellow vaults repository](https://github.com/mellow-finance/mellow-vaults) and checkout on the actual main branch. ``` git clone https://github.com/mellow-finance/mellow-vaults.git ``` Secondly, you should install all necessary dependencies, including [hardhat](https://hardhat.org/). ``` yarn ``` Then you have to set up environment variables. You can do it by creating `.env` file and set the required variables there. ``` // .env MAINNET_RPC= MAINNET_DEPLOYER_PK=0x... # for mainnet deploy MAINNET_PROTOCOL_ADMIN_ADDRESS=0x... MAINNET_STRATEGY_ADMIN_ADDRESS=0x... MAINNET_PROTOCOL_TREASURY_ADDRESS=0x... MAINNET_STRATEGY_TREASURY_ADDRESS=0x... _RPC= _DEPLOYER_PK=0x... # for specific chain deploy ``` Make sure, that all necessary constants in `hardhat.config.js` file is set. Congratulations! You are ready to deploy. ### Deploying You must check the gas value on chain block explorer for smooth deployment and update `TRANSACTION_GAS_LIMITS` constant at `deploy/0000_utils.ts` file with actual values. Hardhat sometimes couldn't estimate base and priority fees correctly, so we set `maxFeePerGas` and `maxPriorityFeePerGas` manually in weis to prevent transaction execution from failing. Everything we have to do now is to only run one command in the shell to deploy the system. ``` yarn deploy:mainnet ``` You can also use `yarn deploy:` for deploying on any other chain, but make sure that this command is initialized in `package.json`. In case of the command failing check, that you've set all necessary env variables, and re-run it. The command won't redeploy contracts, that have already been deployed, except strategies. ### Verifying You can verify contracts after deployment using the following command ``` yarn verify:mainnet ``` You can also use `yarn verify:` for deploying on any other chain, but make sure that this command is initialized in `package.json`. --- # 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.mellow.finance/mellow-alm/overview/tutorials/contracts-deployments.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.