Error Verifying on Etherscan - Solved

[krakxn]

The problem:

It is just the verification which is the problem (contract deploys properly), more below. Really do not know what is wrong - everything seems fine.

Terminal: (only including relevant details where the problem is)

Nothing to compile
----------------------------------------------------
reusing "NftMarketplace" at 0xc25b468c02061AebD3390F80a75f29e2EE6d4BC3
Verifying...
Verifying contract...
TypeError: customChains is not iterable
 at verify (/home/btwkraken/hardhat/hardhat-nft-market-backend/utils/verify.js:7:9)
    at Object.module.exports [as func] (/home/btwkraken/hardhat/hardhat-nft-market-backend/deploy/01-deploy-nft-marketplace.js:24:9)

Relevant code for the above:

01-deploy-nft-marketplace.js

const arguments = []
    const nftMarketplace = await deploy("NftMarketplace", {
        from: deployer,
        args: arguments,
        log: true,
        waitConfirmations: waitBlockConfirmations,
    })

    // Verify the deployment
    if (!developmentChains.includes(network.name) && process.env.ETHERSCAN_API_KEY) {
        log("Verifying...")
        await verify(nftMarketplace.address, arguments)
    }

verify.js

await run("verify:verify", {
            address: contractAddress,
            constructorArguments: args,
        })

Any help is appreciated, thank you.

[hobbescodes]

Recently ran into this issue as well when I attempted to verify a contract's source code on rinkeby. I adjusted the etherscan object in the hardhat config like so:

etherscan: {
        apiKey: {
            rinkeby: ETHERSCAN_API_KEY,
        },
        customChains: [
            {
                network: "rinkeby",
                chainId: 4,
                urls: {
                    apiURL: "https://api-rinkeby.etherscan.io/api",
                    browserURL: "https://rinkeby.etherscan.io",
                },
            },
        ],
    },

this was a suggestion given in the hardhat documentation for the etherscan plugin under the adding support for other networks section: https://hardhat.org/hardhat-runner/plugins/nomiclabs-hardhat-etherscan

[krakxn]

Awesome!! That fixed it for me. Thank you very much!