aave-protocol-v2/test/liquidation-atoken.spec.ts
2020-07-13 11:54:08 +03:00

326 lines
12 KiB
TypeScript

import BigNumber from 'bignumber.js';
import {BRE} from '../helpers/misc-utils';
import {APPROVAL_AMOUNT_LENDING_POOL, MOCK_ETH_ADDRESS, oneEther} from '../helpers/constants';
import {convertToCurrencyDecimals} from '../helpers/contracts-helpers';
import {makeSuite} from './helpers/make-suite';
import {ProtocolErrors, RateMode} from '../helpers/types';
import {calcExpectedVariableDebtTokenBalance} from './helpers/utils/calculations';
import {getUserData, getReserveData} from './helpers/utils/helpers';
const chai = require('chai');
chai.use(require('chai-bignumber')());
const {expect} = chai;
makeSuite('LendingPool liquidation - liquidator receiving aToken', (testEnv) => {
const {
HF_IS_NOT_BELLOW_THRESHOLD,
INVALID_HF,
USER_DID_NOT_BORROW_SPECIFIED,
INVALID_COLLATERAL_TO_LIQUIDATE,
} = ProtocolErrors;
it('LIQUIDATION - Deposits ETH, borrows DAI/Check liquidation fails because health factor is above 1', async () => {
const {dai, users, pool, oracle} = testEnv;
const depositor = users[0];
const borrower = users[1];
//mints DAI to depositor
await dai.connect(depositor.signer).mint(await convertToCurrencyDecimals(dai.address, '1000'));
//approve protocol to access depositor wallet
await dai.connect(depositor.signer).approve(pool.address, APPROVAL_AMOUNT_LENDING_POOL);
//user 1 deposits 1000 DAI
const amountDAItoDeposit = await convertToCurrencyDecimals(dai.address, '1000');
await pool.connect(depositor.signer).deposit(dai.address, amountDAItoDeposit, '0');
//user 2 deposits 1 ETH
const amountETHtoDeposit = await convertToCurrencyDecimals(MOCK_ETH_ADDRESS, '1');
await pool
.connect(borrower.signer)
.deposit(MOCK_ETH_ADDRESS, amountETHtoDeposit, '0', {value: amountETHtoDeposit});
await pool.connect(borrower.signer).deposit(MOCK_ETH_ADDRESS, amountETHtoDeposit, '0', {
value: amountETHtoDeposit,
});
//user 2 borrows
const userGlobalData = await pool.getUserAccountData(borrower.address);
const daiPrice = await oracle.getAssetPrice(dai.address);
const amountDAIToBorrow = await convertToCurrencyDecimals(
dai.address,
new BigNumber(userGlobalData.availableBorrowsETH.toString())
.div(daiPrice.toString())
.multipliedBy(0.95)
.toFixed(0)
);
await pool
.connect(borrower.signer)
.borrow(dai.address, amountDAIToBorrow, RateMode.Variable, '0');
const userGlobalDataAfter = await pool.getUserAccountData(borrower.address);
expect(userGlobalDataAfter.currentLiquidationThreshold).to.be.bignumber.equal(
'80',
'Invalid liquidation threshold'
);
//someone tries to liquidate user 2
await expect(
pool.liquidationCall(MOCK_ETH_ADDRESS, dai.address, borrower.address, 1, true)
).to.be.revertedWith(HF_IS_NOT_BELLOW_THRESHOLD);
});
it('LIQUIDATION - Drop the health factor below 1', async () => {
const {dai, users, pool, oracle} = testEnv;
const borrower = users[1];
const daiPrice = await oracle.getAssetPrice(dai.address);
await oracle.setAssetPrice(
dai.address,
new BigNumber(daiPrice.toString()).multipliedBy(1.15).toFixed(0)
);
const userGlobalData = await pool.getUserAccountData(borrower.address);
expect(userGlobalData.healthFactor.toString()).to.be.bignumber.lt(oneEther, INVALID_HF);
});
it('LIQUIDATION - Tries to liquidate a different currency than the loan principal', async () => {
const {pool, users} = testEnv;
const borrower = users[1];
//user 2 tries to borrow
await expect(
pool.liquidationCall(
MOCK_ETH_ADDRESS,
MOCK_ETH_ADDRESS,
borrower.address,
oneEther.toString(),
true
)
).revertedWith(USER_DID_NOT_BORROW_SPECIFIED);
});
it('LIQUIDATION - Tries to liquidate a different collateral than the borrower collateral', async () => {
const {pool, dai, users} = testEnv;
const borrower = users[1];
await expect(
pool.liquidationCall(dai.address, dai.address, borrower.address, oneEther.toString(), true)
).revertedWith(INVALID_COLLATERAL_TO_LIQUIDATE);
});
it('LIQUIDATION - Liquidates the borrow', async () => {
const {pool, dai, users, oracle} = testEnv;
const borrower = users[1];
//mints dai to the caller
await dai.mint(await convertToCurrencyDecimals(dai.address, '1000'));
//approve protocol to access depositor wallet
await dai.approve(pool.address, APPROVAL_AMOUNT_LENDING_POOL);
const daiReserveDataBefore = await getReserveData(pool, dai.address);
const ethReserveDataBefore = await pool.getReserveData(MOCK_ETH_ADDRESS);
const userReserveDataBefore = await getUserData(pool, dai.address, borrower.address);
const amountToLiquidate = new BigNumber(userReserveDataBefore.currentVariableDebt.toString())
.div(2)
.toFixed(0);
const tx = await pool.liquidationCall(
MOCK_ETH_ADDRESS,
dai.address,
borrower.address,
amountToLiquidate,
true
);
const userReserveDataAfter = await pool.getUserReserveData(dai.address, borrower.address);
const userGlobalDataAfter = await pool.getUserAccountData(borrower.address);
const daiReserveDataAfter = await pool.getReserveData(dai.address);
const ethReserveDataAfter = await pool.getReserveData(MOCK_ETH_ADDRESS);
const collateralPrice = (await oracle.getAssetPrice(MOCK_ETH_ADDRESS)).toString();
const principalPrice = (await oracle.getAssetPrice(dai.address)).toString();
const collateralDecimals = (
await pool.getReserveConfigurationData(MOCK_ETH_ADDRESS)
).decimals.toString();
const principalDecimals = (
await pool.getReserveConfigurationData(dai.address)
).decimals.toString();
const expectedCollateralLiquidated = new BigNumber(principalPrice)
.times(new BigNumber(amountToLiquidate).times(105))
.times(new BigNumber(10).pow(collateralDecimals))
.div(new BigNumber(collateralPrice).times(new BigNumber(10).pow(principalDecimals)))
.decimalPlaces(0, BigNumber.ROUND_DOWN);
if (!tx.blockNumber) {
expect(false, 'Invalid block number');
return;
}
const txTimestamp = new BigNumber(
(await BRE.ethers.provider.getBlock(tx.blockNumber)).timestamp
);
const variableDebtBeforeTx = calcExpectedVariableDebtTokenBalance(
daiReserveDataBefore,
userReserveDataBefore,
txTimestamp
);
expect(userGlobalDataAfter.healthFactor.toString()).to.be.bignumber.gt(
oneEther.toFixed(0),
'Invalid health factor'
);
expect(userReserveDataAfter.currentVariableDebt).to.be.bignumber.almostEqual(
new BigNumber(variableDebtBeforeTx).minus(amountToLiquidate).toFixed(0),
'Invalid user borrow balance after liquidation'
);
expect(daiReserveDataAfter.availableLiquidity).to.be.bignumber.almostEqual(
new BigNumber(daiReserveDataBefore.availableLiquidity.toString())
.plus(amountToLiquidate)
.toFixed(0),
'Invalid principal available liquidity'
);
expect(ethReserveDataAfter.availableLiquidity).to.be.bignumber.almostEqual(
new BigNumber(ethReserveDataBefore.availableLiquidity.toString()).toFixed(0),
'Invalid collateral available liquidity'
);
});
it('User 3 deposits 1000 USDC, user 4 1 ETH, user 4 borrows - drops HF, liquidates the borrow', async () => {
const {users, pool, usdc, oracle, addressesProvider} = testEnv;
const depositor = users[3];
const borrower = users[4];
//mints USDC to depositor
await usdc
.connect(depositor.signer)
.mint(await convertToCurrencyDecimals(usdc.address, '1000'));
//approve protocol to access depositor wallet
await usdc.connect(depositor.signer).approve(pool.address, APPROVAL_AMOUNT_LENDING_POOL);
//user 3 deposits 1000 USDC
const amountUSDCtoDeposit = await convertToCurrencyDecimals(usdc.address, '1000');
await pool.connect(depositor.signer).deposit(usdc.address, amountUSDCtoDeposit, '0');
//user 4 deposits 1 ETH
const amountETHtoDeposit = await convertToCurrencyDecimals(MOCK_ETH_ADDRESS, '1');
await pool.connect(borrower.signer).deposit(MOCK_ETH_ADDRESS, amountETHtoDeposit, '0', {
value: amountETHtoDeposit,
});
//user 4 borrows
const userGlobalData = await pool.getUserAccountData(borrower.address);
const usdcPrice = await oracle.getAssetPrice(usdc.address);
const amountUSDCToBorrow = await convertToCurrencyDecimals(
usdc.address,
new BigNumber(userGlobalData.availableBorrowsETH.toString())
.div(usdcPrice.toString())
.multipliedBy(0.95)
.toFixed(0)
);
await pool
.connect(borrower.signer)
.borrow(usdc.address, amountUSDCToBorrow, RateMode.Stable, '0');
//drops HF below 1
await oracle.setAssetPrice(
usdc.address,
new BigNumber(usdcPrice.toString()).multipliedBy(1.2).toFixed(0)
);
//mints dai to the liquidator
await usdc.mint(await convertToCurrencyDecimals(usdc.address, '1000'));
//approve protocol to access depositor wallet
await usdc.approve(pool.address, APPROVAL_AMOUNT_LENDING_POOL);
const userReserveDataBefore = await pool.getUserReserveData(usdc.address, borrower.address);
const usdcReserveDataBefore = await pool.getReserveData(usdc.address);
const ethReserveDataBefore = await pool.getReserveData(MOCK_ETH_ADDRESS);
const amountToLiquidate = new BigNumber(userReserveDataBefore.currentStableDebt.toString())
.div(2)
.toFixed(0);
await pool.liquidationCall(
MOCK_ETH_ADDRESS,
usdc.address,
borrower.address,
amountToLiquidate,
true
);
const userReserveDataAfter = await pool.getUserReserveData(usdc.address, borrower.address);
const userGlobalDataAfter = await pool.getUserAccountData(borrower.address);
const usdcReserveDataAfter = await pool.getReserveData(usdc.address);
const ethReserveDataAfter = await pool.getReserveData(MOCK_ETH_ADDRESS);
const collateralPrice = (await oracle.getAssetPrice(MOCK_ETH_ADDRESS)).toString();
const principalPrice = (await oracle.getAssetPrice(usdc.address)).toString();
const collateralDecimals = (
await pool.getReserveConfigurationData(MOCK_ETH_ADDRESS)
).decimals.toString();
const principalDecimals = (
await pool.getReserveConfigurationData(usdc.address)
).decimals.toString();
const expectedCollateralLiquidated = new BigNumber(principalPrice)
.times(new BigNumber(amountToLiquidate).times(105))
.times(new BigNumber(10).pow(collateralDecimals))
.div(new BigNumber(collateralPrice).times(new BigNumber(10).pow(principalDecimals)))
.decimalPlaces(0, BigNumber.ROUND_DOWN);
expect(userGlobalDataAfter.healthFactor.toString()).to.be.bignumber.gt(
oneEther.toFixed(0),
'Invalid health factor'
);
expect(userReserveDataAfter.currentStableDebt.toString()).to.be.bignumber.almostEqual(
new BigNumber(userReserveDataBefore.currentStableDebt.toString())
.minus(amountToLiquidate)
.toFixed(0),
'Invalid user borrow balance after liquidation'
);
expect(usdcReserveDataAfter.availableLiquidity.toString()).to.be.bignumber.almostEqual(
new BigNumber(usdcReserveDataBefore.availableLiquidity.toString())
.plus(amountToLiquidate)
.toFixed(0),
'Invalid principal available liquidity'
);
expect(ethReserveDataAfter.availableLiquidity).to.be.bignumber.almostEqual(
new BigNumber(ethReserveDataBefore.availableLiquidity.toString()).toFixed(0),
'Invalid collateral available liquidity'
);
});
});