Lesson 9: Error: invalid BigNumber string (argument="value", value="0.00000000000000003", code=INVALID_ARGUMENT, version=bignumber/5.7.0)

[Roee-87]

For some reason, line 5 (or line 22) of 01-deploy-raffle.js is generating a bignumber error. Others have posted about big number errors in the 01-deploy, but it seems my issue is specific to this section of the code.

const VRF_SUB_FUND_AMOUNT = ethers.utils.formatEther("30")

which sets the value for fundSubscription():

await vrfCoordinatorV2Mock.fundSubscription(subscriptionId, VRF_SUB_FUND_AMOUNT)

which is causing the following error:
Error: invalid BigNumber string (argument="value", value="0.00000000000000003", code=INVALID_ARGUMENT, version=bignumber/5.7.0)

ethers.utils.formatEther("") converts a string to a big number. The second argument in vrfCoordinatorV2Mock.fundSubscription(subscriptionId, VRF_SUB_FUND_AMOUNT) is supposed to be a uint96 (as defined by @chainlinks .sol code. Not sure how to proceed debugging from here.

full error:
Mocks Deployed!
You are deploying to a local network, you'll need a local network running to interact
Please run yarn hardhat console --network localhost to interact with the deployed smart contracts!

An unexpected error occurred:

Error: ERROR processing /Users/.../Raffle/deploy/01-deploy-raffle.js:
Error: invalid BigNumber string (argument="value", value="0.00000000000000003", code=INVALID_ARGUMENT, version=bignumber/5.7.0)

Full code for 01-deploy:

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

const VRF_SUB_FUND_AMOUNT = ethers.utils.formatEther("30")

module.exports = async function ({ getNamedAccounts, deployments }) {
    const { deploy, log } = deployments
    const { deployer } = await getNamedAccounts()
    const chainId = network.config.chainId
    let vrfCoordinatorV2Address, subscriptionId

    if (developmentChains.includes(network.name)) {
        // create VRFV2 Subscription
        vrfCoordinatorV2Mock = await ethers.getContract("VRFCoordinatorV2Mock")
        vrfCoordinatorV2Address = vrfCoordinatorV2Mock.address
        const transactionResponse = await vrfCoordinatorV2Mock.createSubscription()
        const transactionReceipt = await transactionResponse.wait(1)
        subscriptionId = transactionReceipt.events[0].args.subId
        // Fund the subscription
        // Our mock makes it so we don't actually have to worry about sending fund
        await vrfCoordinatorV2Mock.fundSubscription(subscriptionId, VRF_SUB_FUND_AMOUNT)
    } else {
        vrfCoordinatorV2Address = 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 = [
        vrfCoordinatorV2Address,
        entranceFee,
        gasLane,
        subscriptionId,
        callbackGasLimit,
        interval,
    ]

    const raffle = await deploy("Raffle", {
        from: deployer,
        args: args,
        log: true,
        waitConfirmations: network.config.blockConfirmations || 1,
    })

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

    log("----------------------------------------------------")
}

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

[othaime-en]

Hey @Robbe98 you shouldn't use formatEther() Here const VRF_SUB_FUND_AMOUNT = ethers.utils.formatEther("30") instead use parseEther()
So this line should read const VRF_SUB_FUND_AMOUNT = ethers.utils.parseEther("30")
Also reduce the amount of ETH you are funding your subscription, 30 is too much. Just 2 or 3 is enough.

[Roee-87]

I've tried that (parseEther() and smaller value), though I get a different issue:
Error: invalid BigNumber value (argument="value", value=undefined, code=INVALID_ARGUMENT, version=bignumber/5.7.0)

[Roee-87]

OK, it seemed to be a typographical error
const entranceFee = networkConfig[chainId]["entranceFee'"]
extra single quote at the end of entraceFee.

[othaime-en]

@Robbe98 did fixing the typo solve your problem?

[Roee-87]

Yes, it did. Quite annoying as I was sure that I had triple checked the spelling and carefully combed through each line. Apparently not carefully enough...

[othaime-en]

Glad it was resolved. Be careful next time. Good Luck.

[lucasfernandes]

I did almost the same, but inside the config I've named invernal instead of interval. Lol