Lesson 14: Deploying "mint-nft" script for Random Ipfs Nft and getting error: cannot estimate gas; transaction may fail or may require manual gas limit

[pajserb0y]

Mint.js script (have tried to set gas price manually but it didn't work)

const { network, ethers } = require("hardhat")
const { networkConfig, developmentChains } = require("../helper-hardhat-config")
module.exports = async function ({ getNamedAccounts }) {
    const { deployer } = await getNamedAccounts()

    //BasicNft
    const basicNft = await ethers.getContract("BasicNFT", deployer)
    const basicMint = await basicNft.mintNft()
    await basicMint.wait(1)
    console.log(`Basic Nft index 0 has tokenURI: ${await basicNft.tokenURI(0)}`)

    //RandomIPFS Nft
    const randomIpfsNft = await ethers.getContract("RandomIpfsNft", deployer)
    const mintFee = await randomIpfsNft.getMintFee()

    await new Promise(async (resolve, reject) => {
        setTimeout(resolve, 300000) //5mins
        randomIpfsNft.once("NftMinted", async function () {
            resolve()
        })
        const randomIpfsNftMintTx = await randomIpfsNft.requestNft({
            value: mintFee,
            // gasLimit: "500000",
        })
        const randomIpfsNftMintTxReceipt = await randomIpfsNftMintTx.wait(1)
        if (developmentChains.includes(network.name)) {
            const requestId = randomIpfsNftMintTxReceipt.events[1].args.requestId.toString()
            const vrfCoordinatorV2Mock = await ethers.getContract("VRFCoordinatorV2Mock", deployer)
            await vrfCoordinatorV2Mock.fulfillRandomWords(requestId, randomIpfsNft.address)
        }
    })
    console.log(`Random Nft index 0 has tokenURI: ${await randomIpfsNft.tokenURI(0)}`)

    //Dynamic svg nft
    const highValue = await ethers.utils.parseEther("4000")
    const dynamicSvgNft = await ethers.getContract("DynamicSvgNft", deployer)
    dynamicSvgNftMintTx = await dynamicSvgNft.mintNft(highValue.toString())
    await dynamicSvgNftMintTx.wait(1)

    console.log(`Dynamic Nft index 0 has tokenURI: ${await dynamicSvgNft.tokenURI(0)}`)
}

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

RequestNft() function from RandomIpfsNft contract

    function requestNft() public payable returns (uint256 requestId) {
        if (msg.value < i_mintFee) {
            revert RandomIpfsNft__NeedMoreEthSent();
        }
        requestId = i_vrfCoordinator.requestRandomWords(
            i_gasLane,
            i_subscriptionId,
            REQUEST_CONFIRMATIONS,
            i_callbackGasLimit,
            NUM_WORDS
        );
        s_requestIdToSender[requestId] = msg.sender;
        emit NftRequested(requestId, msg.sender);
    }

helper-hardhat-config.js

    4: {
        name: "rinkeby",
        linkToken: "0x01be23585060835e02b77ef475b0cc51aa1e0709",
        ethUsdPriceFeed: "0x8A753747A1Fa494EC906cE90E9f37563A8AF630e",
        keyHash: "0xd89b2bf150e3b9e13446986e571fb9cab24b13cea0a43ea20a6049a85cc807cc",
        subscriptionId: "8963",
        gasLane: "0xd89b2bf150e3b9e13446986e571fb9cab24b13cea0a43ea20a6049a85cc807cc",
        callbackGasLimit: "500000", // 500,000 gas
        mintFee: "10000000000000000", // 0.01 ETH
        vrfCoordinatorV2: "0x6168499c0cFfCaCD319c818142124B7A15E857ab",
        oracle: "0xc57b33452b4f7bb189bb5afae9cc4aba1f7a4fd8",
        jobId: "6b88e0402e5d415eb946e528b8e0c7ba",
        fee: "100000000000000000",
        fundAmount: "100000000000000000", // 0.1
        keepersUpdateInterval: "30",
    },

Also my repo is here: https://github.com/pajserb0y/nft-hardhat

EDIT: all contracts are successfully deployed and verified on etherscan only minting Random Ipfs Nft doesn't work!

[pajserb0y]

@alymurtazamemon @PatrickAlphaC

[alymurtazamemon]

@pajserb0y try to add manual gas like this:

rinkeby: {
  url: process.env.RPC_URL,
  accounts: [process.env.PRIVATE_KEY],
  chainId: 4,
  blockConfirmations: 6,
  gas: 6000000, // Manual Gas
},

[youneshrz]

the same problem any ideas ?

[ashrth]

@youneshrz @pajserb0y add the gas manually in hardhat.config, I added exactly gas: 600000000 this much, also make sure you have enough funds to make this transaction.