Lesson 13: Error: Transaction reverted without a reason string at <UnrecognizedContract>.<unknown> (0x398ec7346dcd622edc5ae82352f02be94c62d119)

[LakshmiGanesh1706]

Hi Team,
I am getting "Error: Transaction reverted without a reason string" while trying to deposit amount using aave lendingpool using weth mainnet token . Here is the code

`const { ethers, getNamedAccounts, network } = require("hardhat")
const { BigNumber } = require("@ethersproject/bignumber")
const { getWeth, AMOUNT } = require("../scripts/getWeth.js")
const { networkConfig } = require("../helper-hardhat-config")

async function main() {
await getWeth()
const { deployer } = await getNamedAccounts()
const lendingPool = await getLendingPool(deployer)
const wethTokenAddress = networkConfig[network.config.chainId].wethToken
await approveErc20(wethTokenAddress, lendingPool.address, AMOUNT, deployer)
console.log("Depositing WETH...")
await lendingPool.deposit(wethTokenAddress, AMOUNT, deployer, 0)
console.log("Desposited!")
// Getting your borrowing stats
let { availableBorrowsETH, totalDebtETH } = await getBorrowUserData(lendingPool, deployer)
const daiPrice = await getDaiPrice()
const amountDaiToBorrow = availableBorrowsETH.toString() * 0.95 * (1 / daiPrice.toNumber())
const amountDaiToBorrowWei = ethers.utils.parseEther(amountDaiToBorrow.toString())
console.log(You can borrow ${amountDaiToBorrow.toString()} DAI)
await borrowDai(
networkConfig[network.config.chainId].daiToken,
lendingPool,
amountDaiToBorrowWei,
deployer
)
await getBorrowUserData(lendingPool, deployer)
await repay(
amountDaiToBorrowWei,
networkConfig[network.config.chainId].daiToken,
lendingPool,
deployer
)
await getBorrowUserData(lendingPool, deployer)
}

async function repay(amount, daiAddress, lendingPool, account) {
await approveErc20(daiAddress, lendingPool.address, amount, account)
const repayTx = await lendingPool.repay(daiAddress, amount, 1, account)
await repayTx.wait(1)
console.log("Repaid!")
}

async function borrowDai(daiAddress, lendingPool, amountDaiToBorrow, account) {
const borrowTx = await lendingPool.borrow(daiAddress, amountDaiToBorrow, 1, 0, account)
await borrowTx.wait(1)
console.log("You've borrowed!")
}

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()})
return price
}

async function approveErc20(erc20Address, spenderAddress, amount, signer) {
const erc20Token = await ethers.getContractAt("IERC20", erc20Address, signer)
txResponse = await erc20Token.approve(spenderAddress, amount)
await txResponse.wait(1)
console.log("Approved!")
}

async function getLendingPool(account) {
const lendingPoolAddressesProvider = await ethers.getContractAt(
"ILendingPoolAddressesProvider",
networkConfig[network.config.chainId].lendingPoolAddressesProvider,
account
)
const lendingPoolAddress = await lendingPoolAddressesProvider.getLendingPool()
const lendingPool = await ethers.getContractAt("ILendingPool", lendingPoolAddress, account)
return lendingPool
}

async function getBorrowUserData(lendingPool, account) {
const {
totalCollateralETH,
totalDebtETH,
availableBorrowsETH
} = await lendingPool.getUserAccountData(account)
console.log(You have ${totalCollateralETH} worth of ETH deposited.)
console.log(You have ${totalDebtETH} worth of ETH borrowed.)
console.log(You can borrow ${availableBorrowsETH} worth of ETH.)
return { availableBorrowsETH, totalDebtETH }
}

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

I am getting error in this line
await lendingPool.deposit(wethTokenAddress, AMOUNT, deployer, 0)

Error:
Error: Transaction reverted without a reason string at <UnrecognizedContract>.<unknown> (0x398ec7346dcd622edc5ae82352f02be94c62d119) at <UnrecognizedContract>.<unknown> (0x398ec7346dcd622edc5ae82352f02be94c62d119) at processTicksAndRejections (node:internal/process/task_queues:96:5) at HardhatNode._mineBlockWithPendingTxs (/home/lakshmi/ether/hardhat-defi-aave/node_modules/hardhat/src/internal/hardhat-network/provider/node.ts:1650:23) at HardhatNode.mineBlock (/home/lakshmi/ether/hardhat-defi-aave/node_modules/hardhat/src/internal/hardhat-network/provider/node.ts:459:16) at EthModule._sendTransactionAndReturnHash (/home/lakshmi/ether/hardhat-defi-aave/node_modules/hardhat/src/internal/hardhat-network/provider/modules/eth.ts:1496:18) at HardhatNetworkProvider.request (/home/lakshmi/ether/hardhat-defi-aave/node_modules/hardhat/src/internal/hardhat-network/provider/provider.ts:117:18) at EthersProviderWrapper.send (/home/lakshmi/ether/hardhat-defi-aave/node_modules/@nomiclabs/hardhat-ethers/src/internal/ethers-provider-wrapper.ts:13:20)

Could someone please help me on how to proceed further.

[alymurtazamemon]

@LakshmiGanesh1706 push your code to a repo and leave a link here. It is not clear from here.

[LakshmiGanesh1706]

@alymurtazamemon thanks for responding. I just realised that I have copied lendingpoolAddress from aave v1 instead of v2. LendingPoolAddresProvider from v2 doc is working fine.