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Migrate your Smart Contract

This guide will teach you to deploy a smart contract to the EOS EVM using hardhat on both the EOS EVM mainnet and testnet.

Set up your MetaMask​

You can add the EOS EVM Testnet network to your MetaMask in one click with Chainlist.

Just select the network you want to use, and click the Connect Wallet button.

chainlist

Any of your existing Ethereum addresses will work on the EOS EVM, so you can use the same wallet you use for Ethereum or any other EVM compatible chain.

Getting EOS tokens​

If you're on the testnet, you can get some EOS tokens using the testnet faucet.

If you're on the mainnet, you will need to purchase some EOS tokens from an exchange. There is no difference between EOS on the EVM and EOS on the EOS Network. They are the same token, and can be used interchangeably. Once you have some EOS tokens, you can transfer them to your EOS EVM address using a standard EOS transfer.

  • Send tokens to: eosio.evm
  • Set the memo to your EOS EVM address

The eosio.evm contract will then forward the tokens you sent to your EOS EVM address.

Hardhat configuration​

If you want to set up a new hardhat project, head over to their quick start guide.

Open up your hardhat.config.js file and add the following configuration:

const config: HardhatUserConfig = {
    // ...

    networks: {
        eosevm: {
            url: "https://api.evm.eosnetwork.com",
            accounts:[process.env.PRIVATE_KEY],
        },
        eosevm_testnet: {
            url: "https://api.testnet.evm.eosnetwork.com",
            accounts:[process.env.PRIVATE_KEY],
        }
    }
};

🔑 Private Keys

Note that we are using process.env.PRIVATE_KEY to make sure that our private key isn't exposed in our code. This means you need to be using either something like dotenv to inject the key into your environment, add it manually to your environment, or you can just replace the environment variable with your private key directly.

However, be careful putting your actual key into this file, as it may be committed to a public repository, and you should NEVER share your private key with anyone.

Deploying your contract​

Now you can deploy your contract to the EOS EVM testnet:

npx hardhat run scripts/deploy.js --network eosevm

// or for testnet
npx hardhat run scripts/deploy.js --network eosevm_testnet

Once deployed, you will see the address of your new contract, and can view it an explorer by pasting it into the search field.

deploy hardhat

Congratulations!​

You have successfully deployed your first smart contract to the EOS EVM! 🎉

If you already have a front-end application that interacts with your smart contract, you can now point it at the EOS EVM Endpoints and it will work as expected.

Make sure you visit the Compatibility section to learn about the differences between the EOS EVM and Ethereum, and how to make sure your web3 application works on the EOS EVM as expected.

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