lecture 7 . 帮助 . unable to deploy.

[haris4121]

1.i am getting error after running command "yarn hardhat deploy --tags mocks"

local network detechted! deploying mocks ...
An unexpected error occurred:

Error: ERROR processing /Users/harisrashid31/hardhat-fund-me/deploy/00-deloy-mocks.js:
TypeError: Cannot read properties of undefined (reading 'length')

code file is

const { network } = require("hardhat")
const {
    developmentChains,
    DECIMALS,
    INITIAL_ANSWER,
} = require("../helper-hardhat-config")

module.exports = async (hre) => {
    const { getNamedAccounts, deployments } = hre
    const { deploy, log } = deployments
    const { deployer } = await getNamedAccounts()
    const chainId = network.config.chainId
    if (developmentChains.includes(network.name)) {
        log("local network detechted! deploying mocks ...")
        await deploy("MockV3Aggregator", {
            contract: "MockV3Aggregator",
            from: deployer,
            log: true,
            args: [DECIMALS, INITIAL_ANSWER],
        })

        log("mocks deployed")
        log("-----------------------------------------")
    }
}

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

[Nlferu]

Hello @haris4121

Your code seems to be fine. Could you please confirm if your DECIMALS and INITIAL_ANSWER are defined as below?

const DECIMALS = "8"
const INITIAL_ANSWER = "200000000000"

[haris4121]

i had commented out "pragma solidity ^0.6.0;"

after uncommenting this , i am unable to compile it

The Solidity version pragma statement in these files doesn't match any of the configured compilers in your config. 
Change the pragma or configure additional compiler versions in your hardhat config

here is my hardhat-config.js

require("@nomicfoundation/hardhat-toolbox") // this is bundle of  packages, all used in previous project
require("hardhat-deploy")
/** @type import('hardhat/config').HardhatUserConfig */
module.exports = {
    // solidity: "0.8.17",
    solidity: {
        compilers: [{ version: "0.8.17" }, { version: "0.6.6" }],
    },
    defaultNetwork: "hardhat",
}

[Nlferu]

Hi @haris4121

Please change your hardhat-config.js into below:

require("@nomicfoundation/hardhat-toolbox") // this is bundle of  packages, all used in previous project
require("hardhat-deploy")
/** @type import('hardhat/config').HardhatUserConfig */
module.exports = {
    // solidity: "0.8.17",
    solidity: {
        compilers: [{ version: "0.8.17" }, { version: "0.6.0" }],
    },
    defaultNetwork: "hardhat",
}

[haris4121]

sir it is still giving same error ,
here is my github repo link

"github.com/haris4121/fund-me-hardhat"

[Nlferu]

Ok so 2 things to correct @haris4121

1. Your MockV3Aggregator, you are missing there ^ before 0.6.0 and ; at the end

// SPDX-License-Identifier: MIT
pragma solidity ^0.6.0;

import "@chainlink/contracts/src/v0.6/tests/MockV3Aggregator.sol";

2. Your hardhat.config.js is missing below:

    namedAccounts: {
        deployer: {
            default: 0,
            1: 0,
        },
    },

You can also change your hardhat.config.js back to below:

require("@nomicfoundation/hardhat-toolbox") // this is bundle of  packages, all used in previous project
require("hardhat-deploy")
/** @type import('hardhat/config').HardhatUserConfig */
module.exports = {
    // solidity: "0.8.17",
    solidity: {
        compilers: [{ version: "0.8.17" }, { version: "0.6.6" }],
    },
    defaultNetwork: "hardhat",
}

[haris4121]

thank u very much sir.