NomicFoundation/hardhat @nomiclabs/hardhat-etherscan@3.1.0

@nomiclabs/hardhat-etherscan v3.1.0

on GitHub

This release adds support for verifying contracts in chains that are not included by default in hardhat-etherscan.

To do this, you add the network you want to verify in the customChains entry of the Etherscan configuration:

etherscan: {
  apiKey: {
    customNetwork: "<custom-network-api-key>"
  },
  customChains: [
    {
      network: "customNetwork",
      chainId: 12345,
      urls: {
        apiURL: "https://api-custom-network.etherscan.io/api",
        browserURL: "https://custom-network.etherscan.io"
      }
    }
  ]
}

You can read more about this here.

Thanks to @no2chem for the initial implementation and to @calvinaco who helped test this.