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Deploy a contract

The instructions in this guide assume that you already have at least one network running on the platform.

In order to deploy contracts, you will need your network's RPC which is available from your network's dashboard. You also need to funded account. For simplicity, you can use your personal prefunded account or use the faucet to fund a different account.

danger

Never use a private key from an account with actual funds. Always use either the prefunded account or a separate testing account

I. Hardhat​

Deploying your contract​

To deploy contract using Hardhat, please follow the guidelines here: https://hardhat.org/tutorial/deploying-to-a-live-network. You will need to add a new network configuration like the one below to your hardhat.config.js file.

<network name>: {
url: `<Your RPC URL>`,
accounts: [<Your private key>],
},

You can then deploy contracts by specifying this network with the --network parameter.

Verifying your contract on Blockscout​

After deploying your contract, you can verify it on Blockscout by updating your hardhat.config.js file to include verification settings. For example:

module.exports = {
  networks: {
    <network name>: {
      url: `<Your RPC URL>`,
      accounts: [<Your private key>],
    },
  },
  etherscan: {
        apiKey: {
            "<network_name>": "aBcDeFgHiJkLmNoPqRsTuVwXyZ0123456789aBcD",
        },
        customChains: [{
            network: "<network_name>",
            chainId: <network_chain_id>,
            urls: {
                apiURL: "<Modified_Blockscout_URL>/api",
                browserURL: "<Blockscout_URL>"
            }
        }],
  },
};
info

To correctly verify contracts, you need to replace <Modified_Blockscout_URL> with your Blockscout ULR but replace "frontend" with "backend" in the URL.

Also, note that the API key for the explorer is arbitrary and no actual API key is needed.

Then, run the following command:

npx hardhat verify --network <network name> <contract_address> <constructor_param1> <constructor_param2> ...

If your contract's constructor requires parameters, include them in the command.

info

Note that Blockscout ignores the actual values of these parameters, so you can pass arbitrary values as long as they match the expected data types.

Once verified, your contract will appear under the "Verified Contracts" section in Blockscout.

II. Foundry​

To deploy contracts using Foundry, you can follow the documentation here: https://book.getfoundry.sh/forge/deploying. You can run the command below to deploy a simple contract:

$ forge create --rpc-url <your_rpc_url> --private-key <your_private_key> src/MyContract.sol:MyContract