mirror of
https://github.com/Instadapp/aave-protocol-v2.git
synced 2024-07-29 21:47:30 +00:00
493 lines
18 KiB
TypeScript
493 lines
18 KiB
TypeScript
import BigNumber from 'bignumber.js';
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import { DRE, increaseTime } 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 { calcExpectedStableDebtTokenBalance } from './helpers/utils/calculations';
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import { getUserData } from './helpers/utils/helpers';
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import { CommonsConfig } from '../../markets/aave/commons';
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import { parseEther } from 'ethers/lib/utils';
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const chai = require('chai');
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const { expect } = chai;
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makeSuite('LendingPool liquidation - liquidator receiving the underlying asset', (testEnv) => {
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const { INVALID_HF } = ProtocolErrors;
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before('Before LendingPool liquidation: set config', () => {
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BigNumber.config({ DECIMAL_PLACES: 0, ROUNDING_MODE: BigNumber.ROUND_DOWN });
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});
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after('After LendingPool liquidation: reset config', () => {
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BigNumber.config({ DECIMAL_PLACES: 20, ROUNDING_MODE: BigNumber.ROUND_HALF_UP });
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});
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it("It's not possible to liquidate on a non-active collateral or a non active principal", async () => {
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const { configurator, weth, pool, users, dai } = testEnv;
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const user = users[1];
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await configurator.deactivateReserve(weth.address);
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await expect(
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pool.liquidationCall(weth.address, dai.address, user.address, parseEther('1000'), false)
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).to.be.revertedWith('2');
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await configurator.activateReserve(weth.address);
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await configurator.deactivateReserve(dai.address);
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await expect(
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pool.liquidationCall(weth.address, dai.address, user.address, parseEther('1000'), false)
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).to.be.revertedWith('2');
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await configurator.activateReserve(dai.address);
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});
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it('Deposits WETH, borrows DAI', 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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//user 2 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(await convertToCurrencyDecimals(weth.address, '1000'));
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//approve protocol to access the 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 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.Stable, '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_HF
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);
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});
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it('Drop the health factor below 1', async () => {
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const { dai, weth, 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(1.18).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.toFixed(0),
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INVALID_HF
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);
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});
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it('Liquidates the borrow', async () => {
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const { dai, weth, users, pool, oracle, helpersContract } = testEnv;
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const liquidator = users[3];
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const borrower = users[1];
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//mints dai to the liquidator
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await dai.connect(liquidator.signer).mint(await convertToCurrencyDecimals(dai.address, '1000'));
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//approve protocol to access the liquidator wallet
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await dai.connect(liquidator.signer).approve(pool.address, APPROVAL_AMOUNT_LENDING_POOL);
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const daiReserveDataBefore = await helpersContract.getReserveData(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 = userReserveDataBefore.currentStableDebt.div(2).toFixed(0);
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await increaseTime(100);
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const tx = await pool
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.connect(liquidator.signer)
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.liquidationCall(weth.address, dai.address, borrower.address, amountToLiquidate, false);
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const userReserveDataAfter = 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 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);
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const principalPrice = await oracle.getAssetPrice(dai.address);
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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.toString())
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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(
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new BigNumber(collateralPrice.toString()).times(new BigNumber(10).pow(principalDecimals))
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)
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.div(100)
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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 stableDebtBeforeTx = calcExpectedStableDebtTokenBalance(
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userReserveDataBefore.principalStableDebt,
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userReserveDataBefore.stableBorrowRate,
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userReserveDataBefore.stableRateLastUpdated,
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txTimestamp
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);
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expect(userReserveDataAfter.currentStableDebt.toString()).to.be.bignumber.almostEqual(
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stableDebtBeforeTx.minus(amountToLiquidate).toFixed(0),
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'Invalid user debt after liquidation'
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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(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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expect(ethReserveDataAfter.availableLiquidity.toString()).to.be.bignumber.almostEqual(
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new BigNumber(ethReserveDataBefore.availableLiquidity.toString())
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.minus(expectedCollateralLiquidated)
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.toFixed(0),
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'Invalid collateral available liquidity'
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);
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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 { usdc, users, pool, oracle, weth, helpersContract } = testEnv;
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const depositor = users[3];
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const borrower = users[4];
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const liquidator = users[5];
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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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//depositor 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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//borrower 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(await convertToCurrencyDecimals(weth.address, '1000'));
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//approve protocol to access the 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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//borrower 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
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.connect(liquidator.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(liquidator.signer).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 = DRE.ethers.BigNumber.from(
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userReserveDataBefore.currentStableDebt.toString()
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)
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.div(2)
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.toString();
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await pool
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.connect(liquidator.signer)
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.liquidationCall(weth.address, usdc.address, borrower.address, amountToLiquidate, false);
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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);
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const principalPrice = await oracle.getAssetPrice(usdc.address);
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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.toString())
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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(
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new BigNumber(collateralPrice.toString()).times(new BigNumber(10).pow(principalDecimals))
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)
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.div(100)
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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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//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(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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expect(ethReserveDataAfter.availableLiquidity.toString()).to.be.bignumber.almostEqual(
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new BigNumber(ethReserveDataBefore.availableLiquidity.toString())
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.minus(expectedCollateralLiquidated)
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.toFixed(0),
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'Invalid collateral available liquidity'
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);
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});
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it('User 4 deposits 10 AAVE - drops HF, liquidates the AAVE, which results on a lower amount being liquidated', async () => {
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const { aave, usdc, users, pool, oracle, helpersContract } = testEnv;
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const depositor = users[3];
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const borrower = users[4];
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const liquidator = users[5];
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//mints AAVE to borrower
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await aave.connect(borrower.signer).mint(await convertToCurrencyDecimals(aave.address, '10'));
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//approve protocol to access the borrower wallet
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await aave.connect(borrower.signer).approve(pool.address, APPROVAL_AMOUNT_LENDING_POOL);
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//borrower deposits 10 AAVE
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const amountToDeposit = await convertToCurrencyDecimals(aave.address, '10');
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await pool
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.connect(borrower.signer)
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.deposit(aave.address, amountToDeposit, borrower.address, '0');
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const usdcPrice = await oracle.getAssetPrice(usdc.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(1.14).toFixed(0)
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);
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//mints usdc to the liquidator
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await usdc
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.connect(liquidator.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(liquidator.signer).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 aaveReserveDataBefore = await helpersContract.getReserveData(aave.address);
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const amountToLiquidate = new BigNumber(userReserveDataBefore.currentStableDebt.toString())
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.div(2)
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.decimalPlaces(0, BigNumber.ROUND_DOWN)
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.toFixed(0);
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const collateralPrice = await oracle.getAssetPrice(aave.address);
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const principalPrice = await oracle.getAssetPrice(usdc.address);
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await pool
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.connect(liquidator.signer)
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.liquidationCall(aave.address, usdc.address, borrower.address, amountToLiquidate, false);
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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 aaveReserveDataAfter = await helpersContract.getReserveData(aave.address);
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const aaveConfiguration = await helpersContract.getReserveConfigurationData(aave.address);
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const collateralDecimals = aaveConfiguration.decimals.toString();
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const liquidationBonus = aaveConfiguration.liquidationBonus.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 = oneEther.multipliedBy('10');
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const expectedPrincipal = new BigNumber(collateralPrice.toString())
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.times(expectedCollateralLiquidated)
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.times(new BigNumber(10).pow(principalDecimals))
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.div(
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new BigNumber(principalPrice.toString()).times(new BigNumber(10).pow(collateralDecimals))
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)
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.times(10000)
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.div(liquidationBonus.toString())
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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'
|
|
);
|
|
|
|
expect(userReserveDataAfter.currentStableDebt.toString()).to.be.bignumber.almostEqual(
|
|
new BigNumber(userReserveDataBefore.currentStableDebt.toString())
|
|
.minus(expectedPrincipal)
|
|
.toFixed(0),
|
|
'Invalid user borrow balance after liquidation'
|
|
);
|
|
|
|
expect(usdcReserveDataAfter.availableLiquidity.toString()).to.be.bignumber.almostEqual(
|
|
new BigNumber(usdcReserveDataBefore.availableLiquidity.toString())
|
|
.plus(expectedPrincipal)
|
|
.toFixed(0),
|
|
'Invalid principal available liquidity'
|
|
);
|
|
|
|
expect(aaveReserveDataAfter.availableLiquidity.toString()).to.be.bignumber.almostEqual(
|
|
new BigNumber(aaveReserveDataBefore.availableLiquidity.toString())
|
|
.minus(expectedCollateralLiquidated)
|
|
.toFixed(0),
|
|
'Invalid collateral available liquidity'
|
|
);
|
|
});
|
|
});
|