mirror of
https://github.com/Instadapp/aave-protocol-v2.git
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380 lines
13 KiB
TypeScript
380 lines
13 KiB
TypeScript
import BigNumber from 'bignumber.js';
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import { DRE } from '../../helpers/misc-utils';
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import { APPROVAL_AMOUNT_LENDING_POOL, oneEther } from '../../helpers/constants';
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import { convertToCurrencyDecimals } from '../../helpers/contracts-helpers';
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import { makeSuite } from './helpers/make-suite';
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import { ProtocolErrors, RateMode } from '../../helpers/types';
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import { calcExpectedVariableDebtTokenBalance } from './helpers/utils/calculations';
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import { getUserData, getReserveData } from './helpers/utils/helpers';
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const chai = require('chai');
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const { expect } = chai;
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makeSuite('LendingPool liquidation - liquidator receiving aToken', (testEnv) => {
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const {
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LPCM_HEALTH_FACTOR_NOT_BELOW_THRESHOLD,
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INVALID_HF,
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LPCM_SPECIFIED_CURRENCY_NOT_BORROWED_BY_USER,
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LPCM_COLLATERAL_CANNOT_BE_LIQUIDATED,
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LP_IS_PAUSED,
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} = ProtocolErrors;
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it('Deposits WETH, borrows DAI/Check liquidation fails because health factor is above 1', async () => {
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const { dai, weth, users, pool, oracle } = testEnv;
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const depositor = users[0];
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const borrower = users[1];
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//mints DAI to depositor
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await dai.connect(depositor.signer).mint(await convertToCurrencyDecimals(dai.address, '1000'));
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//approve protocol to access depositor wallet
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await dai.connect(depositor.signer).approve(pool.address, APPROVAL_AMOUNT_LENDING_POOL);
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//user 1 deposits 1000 DAI
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const amountDAItoDeposit = await convertToCurrencyDecimals(dai.address, '1000');
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await pool
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.connect(depositor.signer)
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.deposit(dai.address, amountDAItoDeposit, depositor.address, '0');
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const amountETHtoDeposit = await convertToCurrencyDecimals(weth.address, '1');
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//mints WETH to borrower
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await weth.connect(borrower.signer).mint(amountETHtoDeposit);
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//approve protocol to access borrower wallet
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await weth.connect(borrower.signer).approve(pool.address, APPROVAL_AMOUNT_LENDING_POOL);
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//user 2 deposits 1 WETH
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await pool
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.connect(borrower.signer)
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.deposit(weth.address, amountETHtoDeposit, borrower.address, '0');
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//user 2 borrows
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const userGlobalData = await pool.getUserAccountData(borrower.address);
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const daiPrice = await oracle.getAssetPrice(dai.address);
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const amountDAIToBorrow = await convertToCurrencyDecimals(
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dai.address,
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new BigNumber(userGlobalData.availableBorrowsETH.toString())
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.div(daiPrice.toString())
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.multipliedBy(0.95)
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.toFixed(0)
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);
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await pool
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.connect(borrower.signer)
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.borrow(dai.address, amountDAIToBorrow, RateMode.Variable, '0', borrower.address);
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const userGlobalDataAfter = await pool.getUserAccountData(borrower.address);
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expect(userGlobalDataAfter.currentLiquidationThreshold.toString()).to.be.bignumber.equal(
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'8250',
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'Invalid liquidation threshold'
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);
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//someone tries to liquidate user 2
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await expect(
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pool.liquidationCall(weth.address, dai.address, borrower.address, 1, true)
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).to.be.revertedWith(LPCM_HEALTH_FACTOR_NOT_BELOW_THRESHOLD);
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});
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it('Drop the health factor below 1', async () => {
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const { dai, users, pool, oracle } = testEnv;
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const borrower = users[1];
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const daiPrice = await oracle.getAssetPrice(dai.address);
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await oracle.setAssetPrice(
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dai.address,
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new BigNumber(daiPrice.toString()).multipliedBy(1.15).toFixed(0)
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);
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const userGlobalData = await pool.getUserAccountData(borrower.address);
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expect(userGlobalData.healthFactor.toString()).to.be.bignumber.lt(
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oneEther.toString(),
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INVALID_HF
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);
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});
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it('Tries to liquidate a different currency than the loan principal', async () => {
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const { pool, users, weth } = testEnv;
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const borrower = users[1];
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//user 2 tries to borrow
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await expect(
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pool.liquidationCall(weth.address, weth.address, borrower.address, oneEther.toString(), true)
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).revertedWith(LPCM_SPECIFIED_CURRENCY_NOT_BORROWED_BY_USER);
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});
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it('Tries to liquidate a different collateral than the borrower collateral', async () => {
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const { pool, dai, users } = testEnv;
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const borrower = users[1];
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await expect(
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pool.liquidationCall(dai.address, dai.address, borrower.address, oneEther.toString(), true)
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).revertedWith(LPCM_COLLATERAL_CANNOT_BE_LIQUIDATED);
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});
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it('Liquidates the borrow', async () => {
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const { pool, dai, weth, aWETH, aDai, users, oracle, helpersContract, deployer } = testEnv;
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const borrower = users[1];
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//mints dai to the caller
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await dai.mint(await convertToCurrencyDecimals(dai.address, '1000'));
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//approve protocol to access depositor wallet
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await dai.approve(pool.address, APPROVAL_AMOUNT_LENDING_POOL);
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const daiReserveDataBefore = await getReserveData(helpersContract, dai.address);
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const ethReserveDataBefore = await helpersContract.getReserveData(weth.address);
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const userReserveDataBefore = await getUserData(
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pool,
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helpersContract,
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dai.address,
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borrower.address
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);
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const amountToLiquidate = new BigNumber(userReserveDataBefore.currentVariableDebt.toString())
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.div(2)
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.toFixed(0);
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const tx = await pool.liquidationCall(
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weth.address,
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dai.address,
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borrower.address,
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amountToLiquidate,
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true
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);
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const userReserveDataAfter = await helpersContract.getUserReserveData(
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dai.address,
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borrower.address
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);
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const userGlobalDataAfter = await pool.getUserAccountData(borrower.address);
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const daiReserveDataAfter = await helpersContract.getReserveData(dai.address);
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const ethReserveDataAfter = await helpersContract.getReserveData(weth.address);
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const collateralPrice = (await oracle.getAssetPrice(weth.address)).toString();
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const principalPrice = (await oracle.getAssetPrice(dai.address)).toString();
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const collateralDecimals = (
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await helpersContract.getReserveConfigurationData(weth.address)
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).decimals.toString();
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const principalDecimals = (
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await helpersContract.getReserveConfigurationData(dai.address)
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).decimals.toString();
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const expectedCollateralLiquidated = new BigNumber(principalPrice)
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.times(new BigNumber(amountToLiquidate).times(105))
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.times(new BigNumber(10).pow(collateralDecimals))
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.div(new BigNumber(collateralPrice).times(new BigNumber(10).pow(principalDecimals)))
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.decimalPlaces(0, BigNumber.ROUND_DOWN);
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if (!tx.blockNumber) {
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expect(false, 'Invalid block number');
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return;
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}
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const txTimestamp = new BigNumber(
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(await DRE.ethers.provider.getBlock(tx.blockNumber)).timestamp
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);
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const variableDebtBeforeTx = calcExpectedVariableDebtTokenBalance(
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daiReserveDataBefore,
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userReserveDataBefore,
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txTimestamp
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);
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expect(userGlobalDataAfter.healthFactor.toString()).to.be.bignumber.gt(
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oneEther.toFixed(0),
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'Invalid health factor'
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);
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expect(userReserveDataAfter.currentVariableDebt.toString()).to.be.bignumber.almostEqual(
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new BigNumber(variableDebtBeforeTx).minus(amountToLiquidate).toFixed(0),
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'Invalid user borrow balance after liquidation'
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);
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expect(daiReserveDataAfter.availableLiquidity.toString()).to.be.bignumber.almostEqual(
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new BigNumber(daiReserveDataBefore.availableLiquidity.toString())
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.plus(amountToLiquidate)
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.toFixed(0),
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'Invalid principal available liquidity'
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);
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//the liquidity index of the principal reserve needs to be bigger than the index before
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expect(daiReserveDataAfter.liquidityIndex.toString()).to.be.bignumber.gte(
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daiReserveDataBefore.liquidityIndex.toString(),
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'Invalid liquidity index'
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);
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//the principal APY after a liquidation needs to be lower than the APY before
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expect(daiReserveDataAfter.liquidityRate.toString()).to.be.bignumber.lt(
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daiReserveDataBefore.liquidityRate.toString(),
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'Invalid liquidity APY'
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);
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expect(ethReserveDataAfter.availableLiquidity.toString()).to.be.bignumber.almostEqual(
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new BigNumber(ethReserveDataBefore.availableLiquidity.toString()).toFixed(0),
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'Invalid collateral available liquidity'
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);
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expect(
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(await helpersContract.getUserReserveData(weth.address, deployer.address))
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.usageAsCollateralEnabled
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).to.be.true;
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});
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it('User 3 deposits 1000 USDC, user 4 1 WETH, user 4 borrows - drops HF, liquidates the borrow', async () => {
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const { users, pool, usdc, oracle, weth, helpersContract } = testEnv;
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const depositor = users[3];
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const borrower = users[4];
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//mints USDC to depositor
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await usdc
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.connect(depositor.signer)
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.mint(await convertToCurrencyDecimals(usdc.address, '1000'));
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//approve protocol to access depositor wallet
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await usdc.connect(depositor.signer).approve(pool.address, APPROVAL_AMOUNT_LENDING_POOL);
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//user 3 deposits 1000 USDC
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const amountUSDCtoDeposit = await convertToCurrencyDecimals(usdc.address, '1000');
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await pool
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.connect(depositor.signer)
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.deposit(usdc.address, amountUSDCtoDeposit, depositor.address, '0');
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//user 4 deposits 1 ETH
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const amountETHtoDeposit = await convertToCurrencyDecimals(weth.address, '1');
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//mints WETH to borrower
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await weth.connect(borrower.signer).mint(amountETHtoDeposit);
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//approve protocol to access borrower wallet
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await weth.connect(borrower.signer).approve(pool.address, APPROVAL_AMOUNT_LENDING_POOL);
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await pool
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.connect(borrower.signer)
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.deposit(weth.address, amountETHtoDeposit, borrower.address, '0');
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//user 4 borrows
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const userGlobalData = await pool.getUserAccountData(borrower.address);
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const usdcPrice = await oracle.getAssetPrice(usdc.address);
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const amountUSDCToBorrow = await convertToCurrencyDecimals(
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usdc.address,
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new BigNumber(userGlobalData.availableBorrowsETH.toString())
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.div(usdcPrice.toString())
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.multipliedBy(0.9502)
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.toFixed(0)
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);
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await pool
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.connect(borrower.signer)
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.borrow(usdc.address, amountUSDCToBorrow, RateMode.Stable, '0', borrower.address);
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//drops HF below 1
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await oracle.setAssetPrice(
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usdc.address,
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new BigNumber(usdcPrice.toString()).multipliedBy(1.12).toFixed(0)
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);
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//mints dai to the liquidator
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await usdc.mint(await convertToCurrencyDecimals(usdc.address, '1000'));
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//approve protocol to access depositor wallet
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await usdc.approve(pool.address, APPROVAL_AMOUNT_LENDING_POOL);
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const userReserveDataBefore = await helpersContract.getUserReserveData(
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usdc.address,
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borrower.address
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);
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const usdcReserveDataBefore = await helpersContract.getReserveData(usdc.address);
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const ethReserveDataBefore = await helpersContract.getReserveData(weth.address);
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const amountToLiquidate = new BigNumber(userReserveDataBefore.currentStableDebt.toString())
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.multipliedBy(0.5)
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.toFixed(0);
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await pool.liquidationCall(
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weth.address,
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usdc.address,
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borrower.address,
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amountToLiquidate,
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true
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);
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const userReserveDataAfter = await helpersContract.getUserReserveData(
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usdc.address,
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borrower.address
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);
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const userGlobalDataAfter = await pool.getUserAccountData(borrower.address);
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const usdcReserveDataAfter = await helpersContract.getReserveData(usdc.address);
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const ethReserveDataAfter = await helpersContract.getReserveData(weth.address);
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const collateralPrice = (await oracle.getAssetPrice(weth.address)).toString();
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const principalPrice = (await oracle.getAssetPrice(usdc.address)).toString();
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const collateralDecimals = (
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await helpersContract.getReserveConfigurationData(weth.address)
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).decimals.toString();
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const principalDecimals = (
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await helpersContract.getReserveConfigurationData(usdc.address)
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).decimals.toString();
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const expectedCollateralLiquidated = new BigNumber(principalPrice)
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.times(new BigNumber(amountToLiquidate).times(105))
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.times(new BigNumber(10).pow(collateralDecimals))
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.div(new BigNumber(collateralPrice).times(new BigNumber(10).pow(principalDecimals)))
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.decimalPlaces(0, BigNumber.ROUND_DOWN);
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expect(userGlobalDataAfter.healthFactor.toString()).to.be.bignumber.gt(
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oneEther.toFixed(0),
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'Invalid health factor'
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);
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expect(userReserveDataAfter.currentStableDebt.toString()).to.be.bignumber.almostEqual(
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new BigNumber(userReserveDataBefore.currentStableDebt.toString())
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.minus(amountToLiquidate)
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.toFixed(0),
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'Invalid user borrow balance after liquidation'
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);
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expect(usdcReserveDataAfter.availableLiquidity.toString()).to.be.bignumber.almostEqual(
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new BigNumber(usdcReserveDataBefore.availableLiquidity.toString())
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.plus(amountToLiquidate)
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.toFixed(0),
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'Invalid principal available liquidity'
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);
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//the liquidity index of the principal reserve needs to be bigger than the index before
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expect(usdcReserveDataAfter.liquidityIndex.toString()).to.be.bignumber.gte(
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usdcReserveDataBefore.liquidityIndex.toString(),
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'Invalid liquidity index'
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);
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//the principal APY after a liquidation needs to be lower than the APY before
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expect(usdcReserveDataAfter.liquidityRate.toString()).to.be.bignumber.lt(
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usdcReserveDataBefore.liquidityRate.toString(),
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'Invalid liquidity APY'
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);
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expect(ethReserveDataAfter.availableLiquidity.toString()).to.be.bignumber.almostEqual(
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new BigNumber(ethReserveDataBefore.availableLiquidity.toString()).toFixed(0),
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'Invalid collateral available liquidity'
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);
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});
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});
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