Lesson 9: weired issue when verify contract

[TonyLiVan]

I have to add customChains section in order to verify my raffle contract , otherwise, it will be thrown error like:

TypeError: customChains is not iterable
    at getEtherscanEndpoints (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/@nomiclabs/hardhat-etherscan/src/network/prober.ts:33:37)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at Environment._runTaskDefinition (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/hardhat/src/internal/core/runtime-environment.ts:308:14)
    at Environment.run (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/hardhat/src/internal/core/runtime-environment.ts:156:14)
    at SimpleTaskDefinition.verifySubtask [as action] (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/@nomiclabs/hardhat-etherscan/src/index.ts:209:30)
    at Environment._runTaskDefinition (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/hardhat/src/internal/core/runtime-environment.ts:308:14)
    at Environment.run (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/hardhat/src/internal/core/runtime-environment.ts:156:14)
    at verify (/Users/tony/Desktop/hardhat-lottery-fullstack/helper-functions.js:5:9)
    at Object.module.exports [as func] (/Users/tony/Desktop/hardhat-lottery-fullstack/deploy/01_Deploy_Raffle.js:46:9)
    at DeploymentsManager.executeDeployScripts (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/hardhat-deploy/src/DeploymentsManager.ts:1220:22)
✨  Done in 87.91s.

However, I know rinkeby is supported network by hardhat etherscan plugin , it doesn't have to add a customChains section .

Code as below:

require("@nomiclabs/hardhat-waffle")
require("@nomiclabs/hardhat-etherscan")
require("hardhat-deploy")
require("solidity-coverage")
require("hardhat-gas-reporter")
require("hardhat-contract-sizer")
require("dotenv").config()

const RINKEBY_RPC_URL = process.env.RINKEBY_RPC_URL

const ETHERSCAN_API_KEY = process.env.ETHERSCAN_API_KEY
const PRIVATE_KEY = process.env.PRIVATE_KEY

const REPORT_GAS = process.env.REPORT_GAS || false

module.exports = {
    defaultNetwork: "hardhat",
    networks: {
        rinkeby: {
            url: RINKEBY_RPC_URL,
            accounts: PRIVATE_KEY !== undefined ? [PRIVATE_KEY] : [],
            //   accounts: {
            //     mnemonic: MNEMONIC,
            //   },
            // saveDeployments: true,
            saveDeployments: true,
            chainId: 4,
        },
    },
    etherscan: {
        // yarn hardhat verify --network <NETWORK> <CONTRACT_ADDRESS> <CONSTRUCTOR_PARAMETERS>
        apiKey: {
            rinkeby: ETHERSCAN_API_KEY,
        },
        **customChains: [
            {
                network: "rinkeby",
                chainId: 4,
                urls: {
                    apiURL: "https://api-rinkeby.etherscan.io/api",
                    browserURL: "https://rinkeby.etherscan.io",
                },
            },
        ],**
    },
    gasReporter: {
        enabled: REPORT_GAS,
        currency: "USD",
        outputFile: "gas-report.txt",
        noColors: true,
        // coinmarketcap: process.env.COINMARKETCAP_API_KEY,
    },
    contractSizer: {
        runOnCompile: false,
        only: ["Raffle"],
    },
    namedAccounts: {
        deployer: {
            default: 0, // here this will by default take the first account as deployer
            4: 0, // similarly on mainnet it will take the first account as deployer. Note though that depending on how hardhat network are configured, the account 0 on one network can be different than on another
        },
        player: {
            default: 1,
        },
    },
    solidity: {
        compilers: [
            {
                version: "0.8.7",
            },
        ],
    },
    mocha: {
        timeout: 500000, // 500 seconds max for running tests
    },
}

[krakxn]

Push to GitHub and reply w/ the link

[krakxn]

I do not think an array for that is necessary as it is redundant and also serves no use. Hence, it should not be included.

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

Or are you using this in any way?

[TonyLiVan]

I think so too. that's exactly why I am asking . without an array, it will pop up an error like below:

TypeError: customChains is not iterable
at getEtherscanEndpoints (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/@nomiclabs/hardhat-etherscan/src/network/prober.ts:33:37)
at processTicksAndRejections (node:internal/process/task_queues:96:5)
at Environment._runTaskDefinition (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/hardhat/src/internal/core/runtime-environment.ts:308:14)
at Environment.run (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/hardhat/src/internal/core/runtime-environment.ts:156:14)
at SimpleTaskDefinition.verifySubtask [as action] (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/@nomiclabs/hardhat-etherscan/src/index.ts:209:30)
at Environment._runTaskDefinition (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/hardhat/src/internal/core/runtime-environment.ts:308:14)
at Environment.run (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/hardhat/src/internal/core/runtime-environment.ts:156:14)
at verify (/Users/tony/Desktop/hardhat-lottery-fullstack/helper-functions.js:5:9)
at Object.module.exports [as func] (/Users/tony/Desktop/hardhat-lottery-fullstack/deploy/01_Deploy_Raffle.js:46:9)
at DeploymentsManager.executeDeployScripts (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/hardhat-deploy/src/DeploymentsManager.ts:1220:22)
✨ Done in 87.91s.

[krakxn]

It will never pop an error like that, unless you (i.e. which prompts Hardhat to iterate) are iterating through it.

So, you can avoid using it.

[TonyLiVan]

Hi Krakxn, Thanks so much, but you answer my question exactly with my question. I know what this error indicates . but I didn't use any kind of iteration on customChains. That's why I am asking for someone to look at my repo and see what might be wrong .

[TonyLiVan]

because I tried my best , and I didn't find any thing wrong yet .

[alymurtazamemon]

@jameslivancouver Hey! This happens sometime, etherscan does these issues. Now you can it will work.

Here is your contract, I have deployed:

Make sure you have .env file with all the environment variables and env file name should not be .env.example

[TonyLiVan]

It always works for me any time. The only reason I am asking here is that I think customChains array is NOT necessary to be included in hardhat.config.js . However, without that array, error like below will be thrown .

TypeError: customChains is not iterable
at getEtherscanEndpoints (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/@nomiclabs/hardhat-etherscan/src/network/prober.ts:33:37)
at processTicksAndRejections (node:internal/process/task_queues:96:5)
at Environment._runTaskDefinition (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/hardhat/src/internal/core/runtime-environment.ts:308:14)
at Environment.run (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/hardhat/src/internal/core/runtime-environment.ts:156:14)
at SimpleTaskDefinition.verifySubtask [as action] (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/@nomiclabs/hardhat-etherscan/src/index.ts:209:30)
at Environment._runTaskDefinition (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/hardhat/src/internal/core/runtime-environment.ts:308:14)
at Environment.run (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/hardhat/src/internal/core/runtime-environment.ts:156:14)
at verify (/Users/tony/Desktop/hardhat-lottery-fullstack/helper-functions.js:5:9)
at Object.module.exports [as func] (/Users/tony/Desktop/hardhat-lottery-fullstack/deploy/01_Deploy_Raffle.js:46:9)
at DeploymentsManager.executeDeployScripts (/Users/tony/Desktop/hardhat-lottery-fullstack/node_modules/hardhat-deploy/src/DeploymentsManager.ts:1220:22)
✨ Done in 87.91s.

[alymurtazamemon]

@jameslivancouver Yes, it is not required!

[TonyLiVan]

That's why I am asking for someone to look at my repo and see what might be wrong .

[TonyLiVan]

because I tried my best , and I didn't find any thing wrong yet .