aave-protocol-v2/test-suites/test-aave/ltv-validation.spec.ts

import { TestEnv, makeSuite } from './helpers/make-suite';
import {
  APPROVAL_AMOUNT_LENDING_POOL,
  MAX_UINT_AMOUNT,
  RAY,
  MAX_EXPOSURE_CAP,
  MOCK_CHAINLINK_AGGREGATORS_PRICES,
  oneEther,
} from '../../helpers/constants';
import { ProtocolErrors } from '../../helpers/types';
import { MintableERC20, WETH9, WETH9Mocked } from '../../types';
import { parseEther } from '@ethersproject/units';
import { BigNumber } from '@ethersproject/bignumber';
import { strategyDAI } from '../../markets/amm/reservesConfigs';
import { strategyUSDC } from '../../markets/amm/reservesConfigs';
import { ethers } from 'ethers';
import { convertToCurrencyDecimals } from '../../helpers/contracts-helpers';

const { expect } = require('chai');
makeSuite('LTV validation tests', (testEnv: TestEnv) => {
  const {
    VL_LTV_VALIDATION_FAILED,
    RC_INVALID_EXPOSURE_CAP,
    VL_COLLATERAL_CANNOT_COVER_NEW_BORROW,
  } = ProtocolErrors;
  const daiPrice = Number(MOCK_CHAINLINK_AGGREGATORS_PRICES.DAI);
  const usdcPrice = Number(MOCK_CHAINLINK_AGGREGATORS_PRICES.USDC);
  const daiLTV = Number(strategyDAI.baseLTVAsCollateral);
  const usdcLTV = Number(strategyUSDC.baseLTVAsCollateral);

  it('User 1 deposits 10 Dai, 10 USDC, user 2 deposits 1 WETH', async () => {
    const {
      pool,
      dai,
      usdc,
      weth,
      users: [user1, user2],
    } = testEnv;

    const daiAmount = await convertToCurrencyDecimals(dai.address, '10');
    const usdcAmount = await convertToCurrencyDecimals(usdc.address, '10');
    const wethAmount = await convertToCurrencyDecimals(weth.address, '1');

    await dai.connect(user1.signer).approve(pool.address, MAX_UINT_AMOUNT);
    await usdc.connect(user1.signer).approve(pool.address, MAX_UINT_AMOUNT);
    await weth.connect(user2.signer).approve(pool.address, MAX_UINT_AMOUNT);

    await dai.connect(user1.signer).mint(daiAmount);
    await usdc.connect(user1.signer).mint(usdcAmount);
    await weth.connect(user2.signer).mint(wethAmount);

    await pool.connect(user1.signer).deposit(dai.address, daiAmount, user1.address, 0);

    await pool.connect(user1.signer).deposit(usdc.address, usdcAmount, user1.address, 0);

    await pool.connect(user2.signer).deposit(weth.address, wethAmount, user2.address, 0);
  });

  it('Sets the ltv of DAI to 0', async () => {
    const {
      configurator,
      dai,
      helpersContract,
      users: [],
    } = testEnv;

    await configurator.configureReserveAsCollateral(dai.address, 0, 8000, 10500);

    const ltv = (await helpersContract.getReserveConfigurationData(dai.address)).ltv;

    expect(ltv).to.be.equal(0);
  });

  it('Borrows 0.01 weth', async () => {
    const {
      pool,
      weth,
      users: [user1],
    } = testEnv;
    const borrowedAmount = await convertToCurrencyDecimals(weth.address, "0.01");

    pool.connect(user1.signer).borrow(weth.address, borrowedAmount, 1, 0, user1.address);
  });

  it('Tries to withdraw USDC (revert expected)', async () => {
    const {
      pool,
      usdc,
      users: [user1, , , receiver],
    } = testEnv;

    const withdrawnAmount = await convertToCurrencyDecimals(usdc.address, "1");

    await expect(
      pool.connect(user1.signer).withdraw(usdc.address, withdrawnAmount, user1.address)
    ).to.be.revertedWith(VL_LTV_VALIDATION_FAILED); 
  });
});