Lesson15：HttpProviderError

[panxiao46128]

when I try to run the scripts: yarn hardhat run scripts/buy-item.js --network localhost ,seem there is a mistake
I tried so many times to modify it ,but all failed

buy-item.js is

const { ethers, network } = require("hardhat")
const { moveBlocks } = require("../utils/move-blocks")

const TOKEN_ID = 1

async function buyItem() {
   
    const nftMarketplace = await ethers.getContract("NftMarketplace")
    const basicNft = await ethers.getContract("BasicNft")
    const listing = await nftMarketplace.getListing(basicNft.address, TOKEN_ID)
    const price = listing.price.toString()   
    const tx = await nftMarketplace.buyItem(basicNft.address, TOKEN_ID, { value: price })
    await tx.wait(1)
    console.log("NFT Bought!")
    if ((network.config.chainId == "31337")) {
        await moveBlocks(2, (sleepAmount = 1000))
    }
}

buyItem()
    .then(() => process.exit(0))
    .catch((error) => {
        console.error(error)
        process.exit(1)
    })

hardhat-config.js

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()

/**
 * @type import('hardhat/config').HardhatUserConfig
 */

const MAINNET_RPC_URL = process.env.MAINNET_RPC_URL ||process.env.ALCHEMY_MAINNET_RPC_URL ||
    ""
const GOERLI_RPC_URL =
    process.env.GOERLI_RPC_URL || ""
// const POLYGON_MAINNET_RPC_URL =
//     process.env.POLYGON_MAINNET_RPC_URL ||
const PRIVATE_KEY = process.env.PRIVATE_KEY ||""
// optional
// const MNEMONIC = process.env.MNEMONIC 

// Your API key for Etherscan, obtain one at https://etherscan.io/
const ETHERSCAN_API_KEY = process.env.ETHERSCAN_API_KEY ||""
// const POLYGONSCAN_API_KEY = process.env.POLYGONSCAN_API_KEY 
const REPORT_GAS = process.env.REPORT_GAS || false

module.exports = {
    defaultNetwork: "hardhat",
    networks: {
        hardhat: {
            // // If you want to do some forking, uncomment this
            // forking: {
            //   url: MAINNET_RPC_URL
            // }
            chainId: 31337,
        },
        localhost: {
            chainId: 31337,
             gas: 6000000,
           
        },
        goerli: {
            url: GOERLI_RPC_URL,
            accounts: PRIVATE_KEY !== undefined ? [PRIVATE_KEY] : [],
            //   accounts: {
            //     mnemonic: MNEMONIC,
            //   },
            saveDeployments: true,
            chainId: 5,
        },
        mainnet: {
            url: MAINNET_RPC_URL,
            accounts: PRIVATE_KEY !== undefined ? [PRIVATE_KEY] : [],
            //   accounts: {
            //     mnemonic: MNEMONIC,
            //   },
            saveDeployments: true,
            chainId: 1,
        },
        // polygon: {
        //     url: POLYGON_MAINNET_RPC_URL,
        //     accounts: PRIVATE_KEY !== undefined ? [PRIVATE_KEY] : [],
        //     saveDeployments: true,
        //     chainId: 137,
        // },
    },
    etherscan: {
        // npx hardhat verify --network <NETWORK> <CONTRACT_ADDRESS> <CONSTRUCTOR_PARAMETERS>
        apiKey: {
            goerli: ETHERSCAN_API_KEY,
            // polygon: POLYGONSCAN_API_KEY,
        },
    },
    gasReporter: {
        enabled: REPORT_GAS,
        currency: "USD",
        outputFile: "gas-report.txt",
        noColors: true,
        // coinmarketcap: process.env.COINMARKETCAP_API_KEY,
    },
    contractSizer: {
        runOnCompile: false,
        only: ["NftMarketplace"],
    },
    namedAccounts: {
        deployer: {
            default: 0, // here this will by default take the first account as deployer
            1: 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",
            },
            {
                version: "0.4.24",
            },
        ],
    },
    mocha: {
        timeout: 200000, // 200 seconds max for running tests
    },
}

helper-hardhat-config.js

const networkConfig = {
    default: {
        name: "hardhat",
        keepersUpdateInterval: "30",
    },
    31337: {
        name: "localhost",
        subscriptionId: "588",
        ethUsdPriceFeed: "0x9326BFA02ADD2366b30bacB125260Af641031331",
        gasLane: "0x79d3d8832d904592c0bf9818b621522c988bb8b0c05cdc3b15aea1b6e8db0c15", // 30 gwei
        keepersUpdateInterval: "30",
        raffleEntranceFee: "100000000000000000", 
        callbackGasLimit: "500000000", 
    },
    5: {
        name: "goerli",
        subscriptionId: "9518",
        gasLane: "0x79d3d8832d904592c0bf9818b621522c988bb8b0c05cdc3b15aea1b6e8db0c15", // 30 gwei
        keepersUpdateInterval: "30",
        raffleEntranceFee: "100000000000000000", // 0.1 ETH
        callbackGasLimit: "500000", // 500,000 gas
    },
    1: {
        name: "mainnet",
        keepersUpdateInterval: "30",
    },
}

const developmentChains = ["hardhat", "localhost"]
const VERIFICATION_BLOCK_CONFIRMATIONS = 6
const frontEndContractsFile = "../nextjs-nft-marketplace-moralis-fcc/constants/networkMapping.json"
const frontEndContractsFile2 =
    "../graph-nft-marketplace-fcc/constants/networkMapping.json"
const frontEndAbiLocation = "../nextjs-nft-marketplace-moralis-fcc/constants/"
const frontEndAbiLocation2 = "../graph-nft-marketplace-fcc/constants/"

module.exports = {
    networkConfig,
    developmentChains,
    VERIFICATION_BLOCK_CONFIRMATIONS,
    frontEndContractsFile,
    frontEndContractsFile2,
    frontEndAbiLocation,
    frontEndAbiLocation2,
}

[panxiao46128]

when i first deploy this scripts ,the error is" cannot estimate gas; transaction may fail or may require manual gas limit", so i add the gas in the hardhat-config.js .but the another error appear : HttpProviderError.
i can't understand i just deploy this contract in localhost ,why has the provider error ?????

[panxiao46128]

[alymurtazamemon]

@panxiao46128 It is throwing the custom error NotListed from smart contract.

[panxiao46128]

@panxiao46128 It is throwing the custom error NotListed from smart contract.
yes ,this it the entire error report,and eh.....i don't konw how to solve

[panxiao46128]

the custom error 'Notlisted' represent that the Nft havn't been displayed yet in the NftMarket ,but i have run the scripts /mint-and-list .js,so en......i think i have mint the nft already