TypeError: customChains is not iterable

[Abdurrahman-Alizada]

I got this error from utils/verfiy function after running the command yarn hardhat deploy --network rinkeby. Even I copy the entire code from Github.
video time 10:59:00.

[alvaro-8a]

Hi @Abdurrahman-Alizada, i also got this error.

I could solve it by adding the customChains in the hardhat.config.js, in the etherscan section. Like this:

etherscan: {
        // yarn hardhat verify --network <NETWORK> <CONTRACT_ADDRESS> <CONSTRUCTOR_PARAMETERS>
        apiKey: {
            rinkeby: ETHERSCAN_API_KEY,
        },
        // In case the module can't find the rinkeby etherscan automatically
        customChains: [
            {
                network: "rinkeby",
                chainId: 4,
                urls: {
                    apiURL: "https://api-rinkeby.etherscan.io/api",
                    browserURL: "https://rinkeby.etherscan.io",
                },
            },
        ],
    },

It seems like for some reason the hardhat module can't find the rinkeby etherscan data automatically, so we need to pass it through the customChains options.

I found this info in the Hardhat documentation: Adding support for other networks

Hope this works for you too!

[Abdurrahman-Alizada]

Thank you @alvaro-8a . This worked for me.

[PatrickAlphaC]

Awesome!

[terrytjw]

Awesome, it worked for me too! Thanks man!

[Muhammad-Abdullah012]

Thanks, it worked for me too!

[mmuaaz]

It works for me as well, I am gonna open this as Issue, so that course organizer add this in the lesson repo comments and the newer guys be able to avoid this error later,