Lesson 9: failed to get chainId, falling back on net_version...

[subhradeepsamantray]

I was trying to transition to use Sepolia ETH but I am getting some error while deploying the contract.

01-deploy-raffle.js:

const { network, ethers } = require("hardhat")
const { developmentChains, networkConfig } = require("../helper-hardhat-config")
const { verify } = require("../utils/verify")

const VRF_SUB_FUND_AMOUNT = ethers.utils.parseEther("2")

module.exports = async function ({ getNamedAccounts, deployments }) {
    const { deploy, log } = deployments
    const { deployer } = await getNamedAccounts()
    const chainId = network.config.chainId
    let vrfCoordinatorV2MockAddress, subscriptionId

    if (developmentChains.includes(network.name)) {
        const vrfCoordinatorV2Mock = await ethers.getContract("VRFCoordinatorV2Mock")
        vrfCoordinatorV2MockAddress = vrfCoordinatorV2Mock.address
        const transactionResponse = await vrfCoordinatorV2Mock.createSubscription()
        const transactionReceipt = await transactionResponse.wait(1)
        subscriptionId = transactionReceipt.events[0].args.subId
        //Fund the subscription
        //Usually, we need LINK tokens to fund the subscription on real networks
        await vrfCoordinatorV2Mock.fundSubscription(subscriptionId, VRF_SUB_FUND_AMOUNT)
    } else {
        vrfCoordinatorV2MockAddress = networkConfig[chainId]["vrfCoordinatorV2"]
        subscriptionId = networkConfig[chainId]["subscriptionId"]
    }

    const entranceFee = networkConfig[chainId]["entranceFee"]
    const gasLane = networkConfig[chainId]["gasLane"]
    const callBackGasLimit = networkConfig[chainId]["callBackGasLimit"]
    const interval = networkConfig[chainId]["interval"]
    const args = [
        vrfCoordinatorV2MockAddress,
        entranceFee,
        gasLane,
        subscriptionId,
        callBackGasLimit,
        interval,
    ]
    const raffle = await deploy("Raffle", {
        from: deployer,
        args: args,
        log: true,
        waitConfirmations: network.config.blockConfirmations || 1,
    })

    if (!developmentChains.includes(network.name) && process.env.ETHERSCAN_API_KEY) {
        log("Verifying....")
        await verify(raffle.address, args)
    }
    log("-------------------------------------------------------")
}

module.exports.tags = ["all", "raffle"]

helper-hardhat-config.js

const { ethers } = require("hardhat")

const networkConfig = {
    // 5: {
    //     name: "Goerli",
    //     vrfCoordinatorV2: "0x2Ca8E0C643bDe4C2E08ab1fA0da3401AdAD7734D",
    //     entranceFee: ethers.utils.parseEther("0.01"),
    //     gasLane: "0x79d3d8832d904592c0bf9818b621522c988bb8b0c05cdc3b15aea1b6e8db0c15",
    //     subscriptionId: "11683",
    //     callBackGasLimit: "500000",
    //     interval: "30",
    // },
    11155111: {
        name: "Sepolia",
        vrfCoordinatorV2: "0x8103B0A8A00be2DDC778e6e7eaa21791Cd364625",
        entranceFee: ethers.utils.parseEther("0.01"),
        gasLane: "0x474e34a077df58807dbe9c96d3c009b23b3c6d0cce433e59bbf5b34f823bc56c",
        subscriptionId: "1708",
        callBackGasLimit: "500000",
        interval: "30",
    },
    31337: {
        name: "hardhat",
        entranceFee: ethers.utils.parseEther("0.01"),
        gasLane: "0x79d3d8832d904592c0bf9818b621522c988bb8b0c05cdc3b15aea1b6e8db0c15", //does not matter, because we will be mocking it
        callBackGasLimit: "500000",
        interval: "30",
    },
}

const developmentChains = ["hardhat", "localhost"]

module.exports = {
    networkConfig,
    developmentChains,
}

Hardhat-config.js

/** @type import('hardhat/config').HardhatUserConfig */
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 GOERLI_RPC_URL = process.env.GOERLI_RPC_URL || "https://ether-goerli"
const SEPOLIA_RPC_UCL = process.env.SEPOLIA_RPC_UCL || "https:/ether-sepolia"
const PRIVATE_KEY = process.env.PRIVATE_KEY || "0xkey"
const ETHERSCAN_API_KEY = process.env.ETHERSCAN_API_KEY || "key"
const COINMARKETCAP_API_KEY = process.env.COINMARKETCAP_API_KEY || "key"

module.exports = {
    solidity: "0.8.18",
    networks: {
        hardhat: {
            chainId: 31337,
            blockConfirmations: 1,
        },
        // goerli: {
        //     url: GOERLI_RPC_URL,
        //     accounts: [`0x${PRIVATE_KEY}`],
        //     chainId: 5,
        //     blockConfirmations: 6,
        // },
        Sepolia: {
            url: SEPOLIA_RPC_UCL,
            accounts: PRIVATE_KEY !== undefined ? [PRIVATE_KEY] : [],
            chainId: 11155111,
            blockConfirmations: 6,
        },
    },
    gasReporter: {
        enabled: false,
        outputFile: "gas-report.txt",
        noColors: true,
        currency: "USD",
        coinmarketcap: COINMARKETCAP_API_KEY,
        token: "ETH",
    },
    etherscan: {
        apiKey: {
            // goerli: ETHERSCAN_API_KEY,
            sepolia: ETHERSCAN_API_KEY,
        },
    },
    namedAccounts: {
        deployer: {
            default: 0,
        },
        player: {
            default: 1,
        },
    },
    mocha: {
        timeOut: 200000, //200 secs
    },
}

[alymurtazamemon]

@subhradeepsamantray in the networks inside hardhat.config.js file it should be sepolia with small s. And the command should be npx hardhat deploy --network sepolia

[barzangi]

@alymurtazamemon I'm facing the same issue even though the spelling for the sepolia network is correct in my case (lowercase s)