Lesson 13: Error: underflow [ See: https://links.ethers.org/v5-errors-NUMERIC_FAULT-underflow ] (fault="underflow", operation="BigNumber.from", value=19.385226371712914, code=NUMERIC_FAULT, version=bignumber/5.7.0)

[FrankYChills]

Everything was working fine ☑️ until the deposit functionality 🥲. I tried many things to fix this but nothing worked.
Github Repo -> Hardhat-Defi
Also i didnt understood why we have to multiply 0.95 and convert borrowETH to string() and price to toNumber()🤔🤔

const { ethers, network, getNamedAccounts } = require("hardhat");
const { networkConfig } = require("../helper-hardhat-config");
const { getWeth, AMOUNT } = require("./getWETH");
// You have to borrow less amount than you have deposited
async function main() {
  const { deployer } = await getNamedAccounts();
  // AAVE protocol treats everything as ERC20 token
  // convert ETH - WETH(ERC20)
  let erc20Token;
  await getWeth();
  //get aaves's lending pool contract
  console.log("Getting lendingPool contract (Aave)");
  const lendingPool = await getLendingPool(deployer);
  console.log(`Lending Pool Address : ${lendingPool.address}`);
  // deposit to aave
  const wethContractAddress =
    networkConfig[network.config.chainId]["wethToken"];
  //lendingpool contract needs to have access to pull the determined amount(WETH) from our wallet

  //approve  (approving lendingPool contract(aave) to use AMOUNT units from our account)
  console.log("Approving LendingPool (Aave)");
  await approveErc20(
    wethContractAddress,
    lendingPool.address,
    AMOUNT,
    deployer
  );
  console.log("Depositing to Aave ..");
  // as our WETH  contract(Token) has 0.02 WETH in it and we have given permission to lendingPool to use 0.02 WETH it should use that and deposit that
  await lendingPool.deposit(wethContractAddress, AMOUNT, deployer, 0);
  console.log(
    `${(AMOUNT / 1e18).toString()} WETH Got successfully deposited to AAVE`
  );
  const FinalB = await erc20Token.balanceOf(deployer);
  console.log(
    `Your WETH Contract (Token) now has balace Of : ${(
      FinalB / 1e18
    ).toString()} WETH`
  );
  // get userdata from lendingPool
  console.log("Getting your data from Aave ...");
  let { availableBorrowsETH, totalDebtETH } = await getBorrowUserData(
    lendingPool,
    deployer
  );
  console.log("Getting DAI/ETH Price from Chainlink ...");
  const daiPrice = await getDaiPrice();

  const amountDaiToBorrow =
    availableBorrowsETH.toString() * 0.95 * (1 / daiPrice.toString());
  console.log(`You can borrow ${amountDaiToBorrow} DAI from AAVE ...`);
  const amountToBorrowWei = ethers.utils.parseEther(
    amountDaiToBorrow.toString()
  );
  // DAI TOKEN Address on Mainnet
  const daiTokenAddress = networkConfig[network.config.chainId]["daiToken"];
  console.log(`Borrowing ${amountDaiToBorrow.toString()} DAI from AAVE ..`);
  await borrowDai(daiTokenAddress, lendingPool, amountToBorrowWei, deployer);
  console.log("Again, Getting Data from your AAVE ..");
  await getBorrowUserData(lendingPool, deployer);
  async function borrowDai(
    daiAddress,
    lendingPool,
    amountToBorrowWei,
    account
  ) {
    const borrowTx = await lendingPool.borrow(
      daiAddress,
      amountDaiToBorrow,
      1,
      0,
      account
    );
    await borrowTx.wait(1);
    console.log(`Borrowed ${(amountToBorrowWei / 1e18).toString()} from AAVE`);
  }
  async function getDaiPrice() {
    const daiEthPriceFeed = await ethers.getContractAt(
      "AggregatorV3Interface",
      networkConfig[network.config.chainId]["daiEthPriceFeed"]
    );
    const price = (await daiEthPriceFeed.latestRoundData())[1];
    console.log(
      `The DAI/ETH price is ${price.toString()} or 1 DAI = ${(
        price / 1e18
      ).toString()} ETH`
    );
    return price;
  }
  async function getBorrowUserData(lendingPool, account) {
    const { totalCollateralETH, totalDebtETH, availableBorrowsETH } =
      await lendingPool.getUserAccountData(account);
    console.log(
      `You have ${totalCollateralETH} worth of ETH deposited or  ${(
        totalCollateralETH / 1e18
      ).toString()} WETH`
    );
    console.log(
      `You have total debt : ${totalDebtETH} worth of ETH or  ${(
        totalDebtETH / 1e18
      ).toString()} WETH`
    );
    console.log(
      `You can borrow ${availableBorrowsETH} worth of ETH or  ${(
        availableBorrowsETH / 1e18
      ).toString()} WETH`
    );
    return { availableBorrowsETH, totalDebtETH };
  }
  // lendingpooladdressprovider contract address -> 0xB53C1a33016B2DC2fF3653530bfF1848a515c8c5
  // lendingpooladdressprovider contract ABI's at -> contracts/interfaces/IlendingPool
  async function getLendingPool(account) {
    const lendingPoolAddressProvider = await ethers.getContractAt(
      "ILendingPoolAddressesProvider",
      networkConfig[network.config.chainId]["lendingPoolAddressesProvider"],
      account
    );
    // get lendingpool contract address
    const lendingPoolAddresses =
      await lendingPoolAddressProvider.getLendingPool();
    // get lendingpool contract abi
    // lendingpooladdressprovider contract ABI's at -> contracts/interfaces/IlendingPool

    const lendingPool = await ethers.getContractAt(
      "ILendingPool",
      lendingPoolAddresses,
      account
    );
    console.log("Got lendingPool Contract");
    return lendingPool;
  }
  async function approveErc20(
    erc20address, //ERC20 contract address
    spenderAddress,
    amountToSpend,
    account // our account
  ) {
    erc20Token = await ethers.getContractAt(
      "IERC20", // this is contract interface/WETH contract interface
      erc20address,
      account
    );
    // we are approving spender with certain amount to use in behalf of us
    console.log("Approving spender ...");
    const tx = await erc20Token.approve(spenderAddress, amountToSpend);
    console.log("Spender Approoved!");
  }
}
main()
  .then(() => process.exit(0))
  .catch((e) => {
    console.log(e);
    process.exit(1);
  });

Any help is appreciated 😇😇😇

[alymurtazamemon]

@FrankYChills I need to check it will let you know;

I think error is here;

console.log(`Borrowed ${(amountToBorrowWei / 1e18).toString()} from AAVE`);

Until that try to uncomment this and try. I will get back to you.

[FrankYChills]

@alymurtazamemon thanks for your concern but it didn't worked

[FrankYChills]

I found the issue actually i wrote wrong argument name in lendingPool.borrow() function. I changed amountDaiToBorrow => amountToBorrowWei

[alymurtazamemon]

@FrankYChills Good! I was testing your code now, was busy fixing someone else issue.

[cryptocambi]

Got same issue, solve it with your solution @FrankYChills. Thank man