Verify Smart Contract using Hardhat

npx hardhat init

npm i -D dotenv

// hardhat.config.js
require("dotenv").config();

# .env
PRIVATE_KEY=0xYOUR_PRIVATE_KEY
ETHERSCAN_API_KEY=your_celoscan_api_key

    networks: {
        celoSepolia: {
            // can be replaced with the RPC url of your choice.
            url: "https://forno.celo-sepolia.celo-testnet.org/",
            accounts: [process.env.PRIVATE_KEY],
        },
        celo: {
            url: "https://forno.celo.org",
            accounts: [process.env.PRIVATE_KEY],
        }
    },
    etherscan: {
        apiKey: process.env.ETHERSCAN_API_KEY,
        customChains: [
            {
                network: "celoSepolia",
                chainId: 11142220,
                urls: {
                    apiURL: "https://api.etherscan.io/v2/api",
                    browserURL: "https://sepolia.celoscan.io",
                },
            },
            {
                network: "celo",
                chainId: 42220,
                urls: {
                    apiURL: "https://api.etherscan.io/v2/api",
                    browserURL: "https://celoscan.io/",
                },
            },
        ]
    },

npx hardhat verify [CONTRACT_ADDRESS] [...CONSTRUCTOR_ARGS] --network celoSepolia

npx hardhat verify [CONTRACT_ADDRESS] [CONSTRUCTOR_ARGS] --network celo