import { makeSuite, TestEnv } from './helpers/make-suite'; import { convertToCurrencyDecimals, getContract, buildPermitParams, getSignatureFromTypedData, buildRepayAdapterParams, } from '../../helpers/contracts-helpers'; import { getMockUniswapRouter } from '../../helpers/contracts-getters'; import { deployUniswapRepayAdapter } from '../../helpers/contracts-deployments'; import { MockUniswapV2Router02 } from '../../types/MockUniswapV2Router02'; import { Zero } from '@ethersproject/constants'; import BigNumber from 'bignumber.js'; import { DRE, evmRevert, evmSnapshot } from '../../helpers/misc-utils'; import { ethers } from 'ethers'; import { eContractid } from '../../helpers/types'; import { StableDebtToken } from '../../types/StableDebtToken'; import { BUIDLEREVM_CHAINID } from '../../helpers/buidler-constants'; import { MAX_UINT_AMOUNT } from '../../helpers/constants'; import { VariableDebtToken } from '../../types'; const { parseEther } = ethers.utils; const { expect } = require('chai'); makeSuite('Uniswap adapters', (testEnv: TestEnv) => { let mockUniswapRouter: MockUniswapV2Router02; let evmSnapshotId: string; before(async () => { mockUniswapRouter = await getMockUniswapRouter(); }); beforeEach(async () => { evmSnapshotId = await evmSnapshot(); }); afterEach(async () => { await evmRevert(evmSnapshotId); }); describe('UniswapRepayAdapter', () => { beforeEach(async () => { const { users, weth, dai, usdc, aave, pool, deployer } = testEnv; const userAddress = users[0].address; // Provide liquidity await dai.mint(parseEther('20000')); await dai.approve(pool.address, parseEther('20000')); await pool.deposit(dai.address, parseEther('20000'), deployer.address, 0); const usdcLiquidity = await convertToCurrencyDecimals(usdc.address, '2000000'); await usdc.mint(usdcLiquidity); await usdc.approve(pool.address, usdcLiquidity); await pool.deposit(usdc.address, usdcLiquidity, deployer.address, 0); await weth.mint(parseEther('100')); await weth.approve(pool.address, parseEther('100')); await pool.deposit(weth.address, parseEther('100'), deployer.address, 0); await aave.mint(parseEther('1000000')); await aave.approve(pool.address, parseEther('1000000')); await pool.deposit(aave.address, parseEther('1000000'), deployer.address, 0); // Make a deposit for user await weth.mint(parseEther('1000')); await weth.approve(pool.address, parseEther('1000')); await pool.deposit(weth.address, parseEther('1000'), userAddress, 0); await aave.mint(parseEther('1000000')); await aave.approve(pool.address, parseEther('1000000')); await pool.deposit(aave.address, parseEther('1000000'), userAddress, 0); await usdc.mint(usdcLiquidity); await usdc.approve(pool.address, usdcLiquidity); await pool.deposit(usdc.address, usdcLiquidity, userAddress, 0); }); describe('constructor', () => { it('should deploy with correct parameters', async () => { const { addressesProvider, weth } = testEnv; await deployUniswapRepayAdapter([ addressesProvider.address, mockUniswapRouter.address, weth.address, ]); }); it('should revert if not valid addresses provider', async () => { const { weth } = testEnv; expect( deployUniswapRepayAdapter([ mockUniswapRouter.address, mockUniswapRouter.address, weth.address, ]) ).to.be.reverted; }); }); describe('executeOperation', () => { it('should correctly swap tokens and repay debt', async () => { const { users, pool, weth, aWETH, oracle, dai, uniswapRepayAdapter, helpersContract, } = testEnv; const user = users[0].signer; const userAddress = users[0].address; const amountWETHtoSwap = await convertToCurrencyDecimals(weth.address, '10'); const daiPrice = await oracle.getAssetPrice(dai.address); const expectedDaiAmount = await convertToCurrencyDecimals( dai.address, new BigNumber(amountWETHtoSwap.toString()).div(daiPrice.toString()).toFixed(0) ); // Open user Debt await pool.connect(user).borrow(dai.address, expectedDaiAmount, 1, 0, userAddress); const daiStableDebtTokenAddress = ( await helpersContract.getReserveTokensAddresses(dai.address) ).stableDebtTokenAddress; const daiStableDebtContract = await getContract( eContractid.StableDebtToken, daiStableDebtTokenAddress ); const userDaiStableDebtAmountBefore = await daiStableDebtContract.balanceOf(userAddress); const liquidityToSwap = amountWETHtoSwap; await aWETH.connect(user).approve(uniswapRepayAdapter.address, liquidityToSwap); const userAEthBalanceBefore = await aWETH.balanceOf(userAddress); await mockUniswapRouter.connect(user).setAmountToSwap(weth.address, liquidityToSwap); const flashLoanDebt = new BigNumber(expectedDaiAmount.toString()) .multipliedBy(1.0009) .toFixed(0); await mockUniswapRouter.setAmountIn( flashLoanDebt, weth.address, dai.address, liquidityToSwap ); const params = buildRepayAdapterParams( weth.address, liquidityToSwap, 1, 0, 0, 0, '0x0000000000000000000000000000000000000000000000000000000000000000', '0x0000000000000000000000000000000000000000000000000000000000000000', false ); await expect( pool .connect(user) .flashLoan( uniswapRepayAdapter.address, [dai.address], [expectedDaiAmount.toString()], [0], userAddress, params, 0 ) ) .to.emit(uniswapRepayAdapter, 'Swapped') .withArgs(weth.address, dai.address, liquidityToSwap.toString(), flashLoanDebt); const adapterWethBalance = await weth.balanceOf(uniswapRepayAdapter.address); const adapterDaiBalance = await dai.balanceOf(uniswapRepayAdapter.address); const userDaiStableDebtAmount = await daiStableDebtContract.balanceOf(userAddress); const userAEthBalance = await aWETH.balanceOf(userAddress); expect(adapterWethBalance).to.be.eq(Zero); expect(adapterDaiBalance).to.be.eq(Zero); expect(userDaiStableDebtAmountBefore).to.be.gte(expectedDaiAmount); expect(userDaiStableDebtAmount).to.be.lt(expectedDaiAmount); expect(userAEthBalance).to.be.lt(userAEthBalanceBefore); expect(userAEthBalance).to.be.gte(userAEthBalanceBefore.sub(liquidityToSwap)); }); it('should correctly swap tokens and repay debt with permit', async () => { const { users, pool, weth, aWETH, oracle, dai, uniswapRepayAdapter, helpersContract, } = testEnv; const user = users[0].signer; const userAddress = users[0].address; const amountWETHtoSwap = await convertToCurrencyDecimals(weth.address, '10'); const daiPrice = await oracle.getAssetPrice(dai.address); const expectedDaiAmount = await convertToCurrencyDecimals( dai.address, new BigNumber(amountWETHtoSwap.toString()).div(daiPrice.toString()).toFixed(0) ); // Open user Debt await pool.connect(user).borrow(dai.address, expectedDaiAmount, 1, 0, userAddress); const daiStableDebtTokenAddress = ( await helpersContract.getReserveTokensAddresses(dai.address) ).stableDebtTokenAddress; const daiStableDebtContract = await getContract( eContractid.StableDebtToken, daiStableDebtTokenAddress ); const userDaiStableDebtAmountBefore = await daiStableDebtContract.balanceOf(userAddress); const liquidityToSwap = amountWETHtoSwap; const userAEthBalanceBefore = await aWETH.balanceOf(userAddress); const chainId = DRE.network.config.chainId || BUIDLEREVM_CHAINID; const deadline = MAX_UINT_AMOUNT; const nonce = (await aWETH._nonces(userAddress)).toNumber(); const msgParams = buildPermitParams( chainId, aWETH.address, '1', await aWETH.name(), userAddress, uniswapRepayAdapter.address, nonce, deadline, liquidityToSwap.toString() ); const ownerPrivateKey = require('../../test-wallets.js').accounts[1].secretKey; if (!ownerPrivateKey) { throw new Error('INVALID_OWNER_PK'); } const { v, r, s } = getSignatureFromTypedData(ownerPrivateKey, msgParams); await mockUniswapRouter.connect(user).setAmountToSwap(weth.address, liquidityToSwap); const flashLoanDebt = new BigNumber(expectedDaiAmount.toString()) .multipliedBy(1.0009) .toFixed(0); await mockUniswapRouter.setAmountIn( flashLoanDebt, weth.address, dai.address, liquidityToSwap ); const params = buildRepayAdapterParams( weth.address, liquidityToSwap, 1, liquidityToSwap, deadline, v, r, s, false ); await expect( pool .connect(user) .flashLoan( uniswapRepayAdapter.address, [dai.address], [expectedDaiAmount.toString()], [0], userAddress, params, 0 ) ) .to.emit(uniswapRepayAdapter, 'Swapped') .withArgs(weth.address, dai.address, liquidityToSwap.toString(), flashLoanDebt); const adapterWethBalance = await weth.balanceOf(uniswapRepayAdapter.address); const adapterDaiBalance = await dai.balanceOf(uniswapRepayAdapter.address); const userDaiStableDebtAmount = await daiStableDebtContract.balanceOf(userAddress); const userAEthBalance = await aWETH.balanceOf(userAddress); expect(adapterWethBalance).to.be.eq(Zero); expect(adapterDaiBalance).to.be.eq(Zero); expect(userDaiStableDebtAmountBefore).to.be.gte(expectedDaiAmount); expect(userDaiStableDebtAmount).to.be.lt(expectedDaiAmount); expect(userAEthBalance).to.be.lt(userAEthBalanceBefore); expect(userAEthBalance).to.be.gte(userAEthBalanceBefore.sub(liquidityToSwap)); }); it('should revert if caller not lending pool', async () => { const { users, pool, weth, aWETH, oracle, dai, uniswapRepayAdapter } = testEnv; const user = users[0].signer; const userAddress = users[0].address; const amountWETHtoSwap = await convertToCurrencyDecimals(weth.address, '10'); const daiPrice = await oracle.getAssetPrice(dai.address); const expectedDaiAmount = await convertToCurrencyDecimals( dai.address, new BigNumber(amountWETHtoSwap.toString()).div(daiPrice.toString()).toFixed(0) ); // Open user Debt await pool.connect(user).borrow(dai.address, expectedDaiAmount, 1, 0, userAddress); const liquidityToSwap = amountWETHtoSwap; await aWETH.connect(user).approve(uniswapRepayAdapter.address, liquidityToSwap); await mockUniswapRouter.connect(user).setAmountToSwap(weth.address, liquidityToSwap); const params = buildRepayAdapterParams( weth.address, liquidityToSwap, 1, 0, 0, 0, '0x0000000000000000000000000000000000000000000000000000000000000000', '0x0000000000000000000000000000000000000000000000000000000000000000', false ); await expect( uniswapRepayAdapter .connect(user) .executeOperation( [dai.address], [expectedDaiAmount.toString()], [0], userAddress, params ) ).to.be.revertedWith('CALLER_MUST_BE_LENDING_POOL'); }); it('should revert if there is not debt to repay with the specified rate mode', async () => { const { users, pool, weth, oracle, dai, uniswapRepayAdapter, aWETH } = testEnv; const user = users[0].signer; const userAddress = users[0].address; const amountWETHtoSwap = await convertToCurrencyDecimals(weth.address, '10'); await weth.connect(user).mint(amountWETHtoSwap); await weth.connect(user).transfer(uniswapRepayAdapter.address, amountWETHtoSwap); const daiPrice = await oracle.getAssetPrice(dai.address); const expectedDaiAmount = await convertToCurrencyDecimals( dai.address, new BigNumber(amountWETHtoSwap.toString()).div(daiPrice.toString()).toFixed(0) ); // Open user Debt await pool.connect(user).borrow(dai.address, expectedDaiAmount, 2, 0, userAddress); const liquidityToSwap = amountWETHtoSwap; await aWETH.connect(user).approve(uniswapRepayAdapter.address, liquidityToSwap); await mockUniswapRouter.connect(user).setAmountToSwap(weth.address, liquidityToSwap); const params = buildRepayAdapterParams( weth.address, liquidityToSwap, 1, 0, 0, 0, '0x0000000000000000000000000000000000000000000000000000000000000000', '0x0000000000000000000000000000000000000000000000000000000000000000', false ); await expect( pool .connect(user) .flashLoan( uniswapRepayAdapter.address, [dai.address], [expectedDaiAmount.toString()], [0], userAddress, params, 0 ) ).to.be.reverted; }); it('should revert if there is not debt to repay', async () => { const { users, pool, weth, oracle, dai, uniswapRepayAdapter, aWETH } = testEnv; const user = users[0].signer; const userAddress = users[0].address; const amountWETHtoSwap = await convertToCurrencyDecimals(weth.address, '10'); await weth.connect(user).mint(amountWETHtoSwap); await weth.connect(user).transfer(uniswapRepayAdapter.address, amountWETHtoSwap); const daiPrice = await oracle.getAssetPrice(dai.address); const expectedDaiAmount = await convertToCurrencyDecimals( dai.address, new BigNumber(amountWETHtoSwap.toString()).div(daiPrice.toString()).toFixed(0) ); const liquidityToSwap = amountWETHtoSwap; await aWETH.connect(user).approve(uniswapRepayAdapter.address, liquidityToSwap); await mockUniswapRouter.connect(user).setAmountToSwap(weth.address, liquidityToSwap); const params = buildRepayAdapterParams( weth.address, liquidityToSwap, 1, 0, 0, 0, '0x0000000000000000000000000000000000000000000000000000000000000000', '0x0000000000000000000000000000000000000000000000000000000000000000', false ); await expect( pool .connect(user) .flashLoan( uniswapRepayAdapter.address, [dai.address], [expectedDaiAmount.toString()], [0], userAddress, params, 0 ) ).to.be.reverted; }); it('should revert when max amount allowed to swap is bigger than max slippage', async () => { const { users, pool, weth, oracle, dai, aWETH, uniswapRepayAdapter } = testEnv; const user = users[0].signer; const userAddress = users[0].address; const amountWETHtoSwap = await convertToCurrencyDecimals(weth.address, '10'); const daiPrice = await oracle.getAssetPrice(dai.address); const expectedDaiAmount = await convertToCurrencyDecimals( dai.address, new BigNumber(amountWETHtoSwap.toString()).div(daiPrice.toString()).toFixed(0) ); // Open user Debt await pool.connect(user).borrow(dai.address, expectedDaiAmount, 1, 0, userAddress); const bigMaxAmountToSwap = amountWETHtoSwap.mul(2); await aWETH.connect(user).approve(uniswapRepayAdapter.address, bigMaxAmountToSwap); await mockUniswapRouter.connect(user).setAmountToSwap(weth.address, bigMaxAmountToSwap); const flashLoanDebt = new BigNumber(expectedDaiAmount.toString()) .multipliedBy(1.0009) .toFixed(0); await mockUniswapRouter.setAmountIn( flashLoanDebt, weth.address, dai.address, bigMaxAmountToSwap ); const params = buildRepayAdapterParams( weth.address, bigMaxAmountToSwap, 1, 0, 0, 0, '0x0000000000000000000000000000000000000000000000000000000000000000', '0x0000000000000000000000000000000000000000000000000000000000000000', false ); await expect( pool .connect(user) .flashLoan( uniswapRepayAdapter.address, [dai.address], [expectedDaiAmount.toString()], [0], userAddress, params, 0 ) ).to.be.revertedWith('maxAmountToSwap exceed max slippage'); }); it('should swap, repay debt and pull the needed ATokens leaving no leftovers', async () => { const { users, pool, weth, aWETH, oracle, dai, uniswapRepayAdapter, helpersContract, } = testEnv; const user = users[0].signer; const userAddress = users[0].address; const amountWETHtoSwap = await convertToCurrencyDecimals(weth.address, '10'); const daiPrice = await oracle.getAssetPrice(dai.address); const expectedDaiAmount = await convertToCurrencyDecimals( dai.address, new BigNumber(amountWETHtoSwap.toString()).div(daiPrice.toString()).toFixed(0) ); // Open user Debt await pool.connect(user).borrow(dai.address, expectedDaiAmount, 1, 0, userAddress); const daiStableDebtTokenAddress = ( await helpersContract.getReserveTokensAddresses(dai.address) ).stableDebtTokenAddress; const daiStableDebtContract = await getContract( eContractid.StableDebtToken, daiStableDebtTokenAddress ); const userDaiStableDebtAmountBefore = await daiStableDebtContract.balanceOf(userAddress); const liquidityToSwap = amountWETHtoSwap; await aWETH.connect(user).approve(uniswapRepayAdapter.address, liquidityToSwap); const userAEthBalanceBefore = await aWETH.balanceOf(userAddress); const userWethBalanceBefore = await weth.balanceOf(userAddress); const actualWEthSwapped = new BigNumber(liquidityToSwap.toString()) .multipliedBy(0.995) .toFixed(0); await mockUniswapRouter.connect(user).setAmountToSwap(weth.address, actualWEthSwapped); const flashLoanDebt = new BigNumber(expectedDaiAmount.toString()) .multipliedBy(1.0009) .toFixed(0); await mockUniswapRouter.setAmountIn( flashLoanDebt, weth.address, dai.address, actualWEthSwapped ); const params = buildRepayAdapterParams( weth.address, liquidityToSwap, 1, 0, 0, 0, '0x0000000000000000000000000000000000000000000000000000000000000000', '0x0000000000000000000000000000000000000000000000000000000000000000', false ); await expect( pool .connect(user) .flashLoan( uniswapRepayAdapter.address, [dai.address], [expectedDaiAmount.toString()], [0], userAddress, params, 0 ) ) .to.emit(uniswapRepayAdapter, 'Swapped') .withArgs(weth.address, dai.address, actualWEthSwapped.toString(), flashLoanDebt); const adapterWethBalance = await weth.balanceOf(uniswapRepayAdapter.address); const adapterDaiBalance = await dai.balanceOf(uniswapRepayAdapter.address); const userDaiStableDebtAmount = await daiStableDebtContract.balanceOf(userAddress); const userAEthBalance = await aWETH.balanceOf(userAddress); const adapterAEthBalance = await aWETH.balanceOf(uniswapRepayAdapter.address); const userWethBalance = await weth.balanceOf(userAddress); expect(adapterAEthBalance).to.be.eq(Zero); expect(adapterWethBalance).to.be.eq(Zero); expect(adapterDaiBalance).to.be.eq(Zero); expect(userDaiStableDebtAmountBefore).to.be.gte(expectedDaiAmount); expect(userDaiStableDebtAmount).to.be.lt(expectedDaiAmount); expect(userAEthBalance).to.be.lt(userAEthBalanceBefore); expect(userAEthBalance).to.be.eq(userAEthBalanceBefore.sub(actualWEthSwapped)); expect(userWethBalance).to.be.eq(userWethBalanceBefore); }); it('should correctly swap tokens and repay the whole stable debt', async () => { const { users, pool, weth, aWETH, oracle, dai, uniswapRepayAdapter, helpersContract, } = testEnv; const user = users[0].signer; const userAddress = users[0].address; const amountWETHtoSwap = await convertToCurrencyDecimals(weth.address, '10'); const daiPrice = await oracle.getAssetPrice(dai.address); const expectedDaiAmount = await convertToCurrencyDecimals( dai.address, new BigNumber(amountWETHtoSwap.toString()).div(daiPrice.toString()).toFixed(0) ); // Open user Debt await pool.connect(user).borrow(dai.address, expectedDaiAmount, 1, 0, userAddress); const daiStableDebtTokenAddress = ( await helpersContract.getReserveTokensAddresses(dai.address) ).stableDebtTokenAddress; const daiStableDebtContract = await getContract( eContractid.StableDebtToken, daiStableDebtTokenAddress ); const userDaiStableDebtAmountBefore = await daiStableDebtContract.balanceOf(userAddress); // Add a % to repay on top of the debt const liquidityToSwap = new BigNumber(amountWETHtoSwap.toString()) .multipliedBy(1.1) .toFixed(0); await aWETH.connect(user).approve(uniswapRepayAdapter.address, liquidityToSwap); const userAEthBalanceBefore = await aWETH.balanceOf(userAddress); // Add a % to repay on top of the debt const amountToRepay = new BigNumber(expectedDaiAmount.toString()) .multipliedBy(1.1) .toFixed(0); await mockUniswapRouter.connect(user).setAmountToSwap(weth.address, amountWETHtoSwap); await mockUniswapRouter.setDefaultMockValue(amountWETHtoSwap); const params = buildRepayAdapterParams( weth.address, liquidityToSwap, 1, 0, 0, 0, '0x0000000000000000000000000000000000000000000000000000000000000000', '0x0000000000000000000000000000000000000000000000000000000000000000', false ); await pool .connect(user) .flashLoan( uniswapRepayAdapter.address, [dai.address], [amountToRepay.toString()], [0], userAddress, params, 0 ); const adapterWethBalance = await weth.balanceOf(uniswapRepayAdapter.address); const adapterDaiBalance = await dai.balanceOf(uniswapRepayAdapter.address); const userDaiStableDebtAmount = await daiStableDebtContract.balanceOf(userAddress); const userAEthBalance = await aWETH.balanceOf(userAddress); const adapterAEthBalance = await aWETH.balanceOf(uniswapRepayAdapter.address); expect(adapterAEthBalance).to.be.eq(Zero); expect(adapterWethBalance).to.be.eq(Zero); expect(adapterDaiBalance).to.be.eq(Zero); expect(userDaiStableDebtAmountBefore).to.be.gte(expectedDaiAmount); expect(userDaiStableDebtAmount).to.be.eq(Zero); expect(userAEthBalance).to.be.lt(userAEthBalanceBefore); expect(userAEthBalance).to.be.gte(userAEthBalanceBefore.sub(liquidityToSwap)); }); it('should correctly swap tokens and repay the whole variable debt', async () => { const { users, pool, weth, aWETH, oracle, dai, uniswapRepayAdapter, helpersContract, } = testEnv; const user = users[0].signer; const userAddress = users[0].address; const amountWETHtoSwap = await convertToCurrencyDecimals(weth.address, '10'); const daiPrice = await oracle.getAssetPrice(dai.address); const expectedDaiAmount = await convertToCurrencyDecimals( dai.address, new BigNumber(amountWETHtoSwap.toString()).div(daiPrice.toString()).toFixed(0) ); // Open user Debt await pool.connect(user).borrow(dai.address, expectedDaiAmount, 2, 0, userAddress); const daiStableVariableTokenAddress = ( await helpersContract.getReserveTokensAddresses(dai.address) ).variableDebtTokenAddress; const daiVariableDebtContract = await getContract( eContractid.VariableDebtToken, daiStableVariableTokenAddress ); const userDaiVariableDebtAmountBefore = await daiVariableDebtContract.balanceOf( userAddress ); // Add a % to repay on top of the debt const liquidityToSwap = new BigNumber(amountWETHtoSwap.toString()) .multipliedBy(1.1) .toFixed(0); await aWETH.connect(user).approve(uniswapRepayAdapter.address, liquidityToSwap); const userAEthBalanceBefore = await aWETH.balanceOf(userAddress); // Add a % to repay on top of the debt const amountToRepay = new BigNumber(expectedDaiAmount.toString()) .multipliedBy(1.1) .toFixed(0); await mockUniswapRouter.connect(user).setAmountToSwap(weth.address, amountWETHtoSwap); await mockUniswapRouter.setDefaultMockValue(amountWETHtoSwap); const params = buildRepayAdapterParams( weth.address, liquidityToSwap, 2, 0, 0, 0, '0x0000000000000000000000000000000000000000000000000000000000000000', '0x0000000000000000000000000000000000000000000000000000000000000000', false ); await pool .connect(user) .flashLoan( uniswapRepayAdapter.address, [dai.address], [amountToRepay.toString()], [0], userAddress, params, 0 ); const adapterWethBalance = await weth.balanceOf(uniswapRepayAdapter.address); const adapterDaiBalance = await dai.balanceOf(uniswapRepayAdapter.address); const userDaiVariableDebtAmount = await daiVariableDebtContract.balanceOf(userAddress); const userAEthBalance = await aWETH.balanceOf(userAddress); const adapterAEthBalance = await aWETH.balanceOf(uniswapRepayAdapter.address); expect(adapterAEthBalance).to.be.eq(Zero); expect(adapterWethBalance).to.be.eq(Zero); expect(adapterDaiBalance).to.be.eq(Zero); expect(userDaiVariableDebtAmountBefore).to.be.gte(expectedDaiAmount); expect(userDaiVariableDebtAmount).to.be.eq(Zero); expect(userAEthBalance).to.be.lt(userAEthBalanceBefore); expect(userAEthBalance).to.be.gte(userAEthBalanceBefore.sub(liquidityToSwap)); }); it('should correctly repay debt via flash loan using the same asset as collateral', async () => { const { users, pool, aDai, dai, uniswapRepayAdapter, helpersContract } = testEnv; const user = users[0].signer; const userAddress = users[0].address; // Add deposit for user await dai.mint(parseEther('30')); await dai.approve(pool.address, parseEther('30')); await pool.deposit(dai.address, parseEther('30'), userAddress, 0); const amountCollateralToSwap = parseEther('10'); const debtAmount = parseEther('10'); // Open user Debt await pool.connect(user).borrow(dai.address, debtAmount, 2, 0, userAddress); const daiVariableDebtTokenAddress = ( await helpersContract.getReserveTokensAddresses(dai.address) ).variableDebtTokenAddress; const daiVariableDebtContract = await getContract( eContractid.VariableDebtToken, daiVariableDebtTokenAddress ); const userDaiVariableDebtAmountBefore = await daiVariableDebtContract.balanceOf( userAddress ); const flashLoanDebt = new BigNumber(amountCollateralToSwap.toString()) .multipliedBy(1.0009) .toFixed(0); await aDai.connect(user).approve(uniswapRepayAdapter.address, flashLoanDebt); const userADaiBalanceBefore = await aDai.balanceOf(userAddress); const userDaiBalanceBefore = await dai.balanceOf(userAddress); const params = buildRepayAdapterParams( dai.address, amountCollateralToSwap, 2, 0, 0, 0, '0x0000000000000000000000000000000000000000000000000000000000000000', '0x0000000000000000000000000000000000000000000000000000000000000000', false ); await pool .connect(user) .flashLoan( uniswapRepayAdapter.address, [dai.address], [amountCollateralToSwap.toString()], [0], userAddress, params, 0 ); const adapterDaiBalance = await dai.balanceOf(uniswapRepayAdapter.address); const userDaiVariableDebtAmount = await daiVariableDebtContract.balanceOf(userAddress); const userADaiBalance = await aDai.balanceOf(userAddress); const adapterADaiBalance = await aDai.balanceOf(uniswapRepayAdapter.address); const userDaiBalance = await dai.balanceOf(userAddress); expect(adapterADaiBalance).to.be.eq(Zero, 'adapter aDAI balance should be zero'); expect(adapterDaiBalance).to.be.eq(Zero, 'adapter DAI balance should be zero'); expect(userDaiVariableDebtAmountBefore).to.be.gte( debtAmount, ' user DAI variable debt before should be gte debtAmount' ); expect(userDaiVariableDebtAmount).to.be.lt( debtAmount, 'user dai variable debt amount should be lt debt amount' ); expect(userADaiBalance).to.be.lt( userADaiBalanceBefore, 'user aDAI balance should be lt aDAI prior balance' ); expect(userADaiBalance).to.be.gte( userADaiBalanceBefore.sub(flashLoanDebt), 'user aDAI balance should be gte aDAI prior balance sub flash loan debt' ); expect(userDaiBalance).to.be.eq(userDaiBalanceBefore, 'user dai balance eq prior balance'); }); }); describe('swapAndRepay', () => { it('should correctly swap tokens and repay debt', async () => { const { users, pool, weth, aWETH, oracle, dai, uniswapRepayAdapter, helpersContract, } = testEnv; const user = users[0].signer; const userAddress = users[0].address; const amountWETHtoSwap = await convertToCurrencyDecimals(weth.address, '10'); const daiPrice = await oracle.getAssetPrice(dai.address); const expectedDaiAmount = await convertToCurrencyDecimals( dai.address, new BigNumber(amountWETHtoSwap.toString()).div(daiPrice.toString()).toFixed(0) ); // Open user Debt await pool.connect(user).borrow(dai.address, expectedDaiAmount, 1, 0, userAddress); const daiStableDebtTokenAddress = ( await helpersContract.getReserveTokensAddresses(dai.address) ).stableDebtTokenAddress; const daiStableDebtContract = await getContract( eContractid.StableDebtToken, daiStableDebtTokenAddress ); const userDaiStableDebtAmountBefore = await daiStableDebtContract.balanceOf(userAddress); const liquidityToSwap = amountWETHtoSwap; await aWETH.connect(user).approve(uniswapRepayAdapter.address, liquidityToSwap); const userAEthBalanceBefore = await aWETH.balanceOf(userAddress); await mockUniswapRouter.setAmountToSwap(weth.address, liquidityToSwap); await mockUniswapRouter.setDefaultMockValue(liquidityToSwap); await uniswapRepayAdapter.connect(user).swapAndRepay( weth.address, dai.address, liquidityToSwap, expectedDaiAmount, 1, { amount: 0, deadline: 0, v: 0, r: '0x0000000000000000000000000000000000000000000000000000000000000000', s: '0x0000000000000000000000000000000000000000000000000000000000000000', }, false ); const adapterWethBalance = await weth.balanceOf(uniswapRepayAdapter.address); const adapterDaiBalance = await dai.balanceOf(uniswapRepayAdapter.address); const userDaiStableDebtAmount = await daiStableDebtContract.balanceOf(userAddress); const userAEthBalance = await aWETH.balanceOf(userAddress); expect(adapterWethBalance).to.be.eq(Zero); expect(adapterDaiBalance).to.be.eq(Zero); expect(userDaiStableDebtAmountBefore).to.be.gte(expectedDaiAmount); expect(userDaiStableDebtAmount).to.be.lt(expectedDaiAmount); expect(userAEthBalance).to.be.lt(userAEthBalanceBefore); expect(userAEthBalance).to.be.gte(userAEthBalanceBefore.sub(liquidityToSwap)); }); it('should correctly swap tokens and repay debt with permit', async () => { const { users, pool, weth, aWETH, oracle, dai, uniswapRepayAdapter, helpersContract, } = testEnv; const user = users[0].signer; const userAddress = users[0].address; const amountWETHtoSwap = await convertToCurrencyDecimals(weth.address, '10'); const daiPrice = await oracle.getAssetPrice(dai.address); const expectedDaiAmount = await convertToCurrencyDecimals( dai.address, new BigNumber(amountWETHtoSwap.toString()).div(daiPrice.toString()).toFixed(0) ); // Open user Debt await pool.connect(user).borrow(dai.address, expectedDaiAmount, 1, 0, userAddress); const daiStableDebtTokenAddress = ( await helpersContract.getReserveTokensAddresses(dai.address) ).stableDebtTokenAddress; const daiStableDebtContract = await getContract( eContractid.StableDebtToken, daiStableDebtTokenAddress ); const userDaiStableDebtAmountBefore = await daiStableDebtContract.balanceOf(userAddress); const liquidityToSwap = amountWETHtoSwap; const userAEthBalanceBefore = await aWETH.balanceOf(userAddress); await mockUniswapRouter.setAmountToSwap(weth.address, liquidityToSwap); await mockUniswapRouter.setDefaultMockValue(liquidityToSwap); const chainId = DRE.network.config.chainId || BUIDLEREVM_CHAINID; const deadline = MAX_UINT_AMOUNT; const nonce = (await aWETH._nonces(userAddress)).toNumber(); const msgParams = buildPermitParams( chainId, aWETH.address, '1', await aWETH.name(), userAddress, uniswapRepayAdapter.address, nonce, deadline, liquidityToSwap.toString() ); const ownerPrivateKey = require('../../test-wallets.js').accounts[1].secretKey; if (!ownerPrivateKey) { throw new Error('INVALID_OWNER_PK'); } const { v, r, s } = getSignatureFromTypedData(ownerPrivateKey, msgParams); await uniswapRepayAdapter.connect(user).swapAndRepay( weth.address, dai.address, liquidityToSwap, expectedDaiAmount, 1, { amount: liquidityToSwap, deadline, v, r, s, }, false ); const adapterWethBalance = await weth.balanceOf(uniswapRepayAdapter.address); const adapterDaiBalance = await dai.balanceOf(uniswapRepayAdapter.address); const userDaiStableDebtAmount = await daiStableDebtContract.balanceOf(userAddress); const userAEthBalance = await aWETH.balanceOf(userAddress); expect(adapterWethBalance).to.be.eq(Zero); expect(adapterDaiBalance).to.be.eq(Zero); expect(userDaiStableDebtAmountBefore).to.be.gte(expectedDaiAmount); expect(userDaiStableDebtAmount).to.be.lt(expectedDaiAmount); expect(userAEthBalance).to.be.lt(userAEthBalanceBefore); expect(userAEthBalance).to.be.gte(userAEthBalanceBefore.sub(liquidityToSwap)); }); it('should revert if there is not debt to repay', async () => { const { users, weth, aWETH, oracle, dai, uniswapRepayAdapter } = testEnv; const user = users[0].signer; const amountWETHtoSwap = await convertToCurrencyDecimals(weth.address, '10'); const daiPrice = await oracle.getAssetPrice(dai.address); const expectedDaiAmount = await convertToCurrencyDecimals( dai.address, new BigNumber(amountWETHtoSwap.toString()).div(daiPrice.toString()).toFixed(0) ); const liquidityToSwap = amountWETHtoSwap; await aWETH.connect(user).approve(uniswapRepayAdapter.address, liquidityToSwap); await mockUniswapRouter.setAmountToSwap(weth.address, liquidityToSwap); await mockUniswapRouter.setDefaultMockValue(liquidityToSwap); await expect( uniswapRepayAdapter.connect(user).swapAndRepay( weth.address, dai.address, liquidityToSwap, expectedDaiAmount, 1, { amount: 0, deadline: 0, v: 0, r: '0x0000000000000000000000000000000000000000000000000000000000000000', s: '0x0000000000000000000000000000000000000000000000000000000000000000', }, false ) ).to.be.reverted; }); it('should revert when max amount allowed to swap is bigger than max slippage', async () => { const { users, pool, weth, aWETH, oracle, dai, uniswapRepayAdapter } = testEnv; const user = users[0].signer; const userAddress = users[0].address; const amountWETHtoSwap = await convertToCurrencyDecimals(weth.address, '10'); const daiPrice = await oracle.getAssetPrice(dai.address); const expectedDaiAmount = await convertToCurrencyDecimals( dai.address, new BigNumber(amountWETHtoSwap.toString()).div(daiPrice.toString()).toFixed(0) ); // Open user Debt await pool.connect(user).borrow(dai.address, expectedDaiAmount, 1, 0, userAddress); const bigMaxAmountToSwap = amountWETHtoSwap.mul(2); await aWETH.connect(user).approve(uniswapRepayAdapter.address, bigMaxAmountToSwap); await mockUniswapRouter.connect(user).setAmountToSwap(weth.address, bigMaxAmountToSwap); await mockUniswapRouter.setDefaultMockValue(bigMaxAmountToSwap); await expect( uniswapRepayAdapter.connect(user).swapAndRepay( weth.address, dai.address, bigMaxAmountToSwap, expectedDaiAmount, 1, { amount: 0, deadline: 0, v: 0, r: '0x0000000000000000000000000000000000000000000000000000000000000000', s: '0x0000000000000000000000000000000000000000000000000000000000000000', }, false ) ).to.be.revertedWith('maxAmountToSwap exceed max slippage'); }); it('should swap, repay debt and pull the needed ATokens leaving no leftovers', async () => { const { users, pool, weth, aWETH, oracle, dai, uniswapRepayAdapter, helpersContract, } = testEnv; const user = users[0].signer; const userAddress = users[0].address; const amountWETHtoSwap = await convertToCurrencyDecimals(weth.address, '10'); const daiPrice = await oracle.getAssetPrice(dai.address); const expectedDaiAmount = await convertToCurrencyDecimals( dai.address, new BigNumber(amountWETHtoSwap.toString()).div(daiPrice.toString()).toFixed(0) ); // Open user Debt await pool.connect(user).borrow(dai.address, expectedDaiAmount, 1, 0, userAddress); const daiStableDebtTokenAddress = ( await helpersContract.getReserveTokensAddresses(dai.address) ).stableDebtTokenAddress; const daiStableDebtContract = await getContract( eContractid.StableDebtToken, daiStableDebtTokenAddress ); const userDaiStableDebtAmountBefore = await daiStableDebtContract.balanceOf(userAddress); const liquidityToSwap = amountWETHtoSwap; await aWETH.connect(user).approve(uniswapRepayAdapter.address, liquidityToSwap); const userAEthBalanceBefore = await aWETH.balanceOf(userAddress); const userWethBalanceBefore = await weth.balanceOf(userAddress); const actualWEthSwapped = new BigNumber(liquidityToSwap.toString()) .multipliedBy(0.995) .toFixed(0); await mockUniswapRouter.connect(user).setAmountToSwap(weth.address, actualWEthSwapped); await mockUniswapRouter.setDefaultMockValue(actualWEthSwapped); await uniswapRepayAdapter.connect(user).swapAndRepay( weth.address, dai.address, liquidityToSwap, expectedDaiAmount, 1, { amount: 0, deadline: 0, v: 0, r: '0x0000000000000000000000000000000000000000000000000000000000000000', s: '0x0000000000000000000000000000000000000000000000000000000000000000', }, false ); const adapterWethBalance = await weth.balanceOf(uniswapRepayAdapter.address); const adapterDaiBalance = await dai.balanceOf(uniswapRepayAdapter.address); const userDaiStableDebtAmount = await daiStableDebtContract.balanceOf(userAddress); const userAEthBalance = await aWETH.balanceOf(userAddress); const adapterAEthBalance = await aWETH.balanceOf(uniswapRepayAdapter.address); const userWethBalance = await weth.balanceOf(userAddress); expect(adapterAEthBalance).to.be.eq(Zero); expect(adapterWethBalance).to.be.eq(Zero); expect(adapterDaiBalance).to.be.eq(Zero); expect(userDaiStableDebtAmountBefore).to.be.gte(expectedDaiAmount); expect(userDaiStableDebtAmount).to.be.lt(expectedDaiAmount); expect(userAEthBalance).to.be.lt(userAEthBalanceBefore); expect(userAEthBalance).to.be.eq(userAEthBalanceBefore.sub(actualWEthSwapped)); expect(userWethBalance).to.be.eq(userWethBalanceBefore); }); it('should correctly swap tokens and repay the whole stable debt', async () => { const { users, pool, weth, aWETH, oracle, dai, uniswapRepayAdapter, helpersContract, } = testEnv; const user = users[0].signer; const userAddress = users[0].address; const amountWETHtoSwap = await convertToCurrencyDecimals(weth.address, '10'); const daiPrice = await oracle.getAssetPrice(dai.address); const expectedDaiAmount = await convertToCurrencyDecimals( dai.address, new BigNumber(amountWETHtoSwap.toString()).div(daiPrice.toString()).toFixed(0) ); // Open user Debt await pool.connect(user).borrow(dai.address, expectedDaiAmount, 1, 0, userAddress); const daiStableDebtTokenAddress = ( await helpersContract.getReserveTokensAddresses(dai.address) ).stableDebtTokenAddress; const daiStableDebtContract = await getContract( eContractid.StableDebtToken, daiStableDebtTokenAddress ); const userDaiStableDebtAmountBefore = await daiStableDebtContract.balanceOf(userAddress); // Add a % to repay on top of the debt const liquidityToSwap = new BigNumber(amountWETHtoSwap.toString()) .multipliedBy(1.1) .toFixed(0); await aWETH.connect(user).approve(uniswapRepayAdapter.address, liquidityToSwap); const userAEthBalanceBefore = await aWETH.balanceOf(userAddress); // Add a % to repay on top of the debt const amountToRepay = new BigNumber(expectedDaiAmount.toString()) .multipliedBy(1.1) .toFixed(0); await mockUniswapRouter.connect(user).setAmountToSwap(weth.address, amountWETHtoSwap); await mockUniswapRouter.setDefaultMockValue(amountWETHtoSwap); await uniswapRepayAdapter.connect(user).swapAndRepay( weth.address, dai.address, liquidityToSwap, amountToRepay, 1, { amount: 0, deadline: 0, v: 0, r: '0x0000000000000000000000000000000000000000000000000000000000000000', s: '0x0000000000000000000000000000000000000000000000000000000000000000', }, false ); const adapterWethBalance = await weth.balanceOf(uniswapRepayAdapter.address); const adapterDaiBalance = await dai.balanceOf(uniswapRepayAdapter.address); const userDaiStableDebtAmount = await daiStableDebtContract.balanceOf(userAddress); const userAEthBalance = await aWETH.balanceOf(userAddress); const adapterAEthBalance = await aWETH.balanceOf(uniswapRepayAdapter.address); expect(adapterAEthBalance).to.be.eq(Zero); expect(adapterWethBalance).to.be.eq(Zero); expect(adapterDaiBalance).to.be.eq(Zero); expect(userDaiStableDebtAmountBefore).to.be.gte(expectedDaiAmount); expect(userDaiStableDebtAmount).to.be.eq(Zero); expect(userAEthBalance).to.be.lt(userAEthBalanceBefore); expect(userAEthBalance).to.be.gte(userAEthBalanceBefore.sub(liquidityToSwap)); }); it('should correctly swap tokens and repay the whole variable debt', async () => { const { users, pool, weth, aWETH, oracle, dai, uniswapRepayAdapter, helpersContract, } = testEnv; const user = users[0].signer; const userAddress = users[0].address; const amountWETHtoSwap = await convertToCurrencyDecimals(weth.address, '10'); const daiPrice = await oracle.getAssetPrice(dai.address); const expectedDaiAmount = await convertToCurrencyDecimals( dai.address, new BigNumber(amountWETHtoSwap.toString()).div(daiPrice.toString()).toFixed(0) ); // Open user Debt await pool.connect(user).borrow(dai.address, expectedDaiAmount, 2, 0, userAddress); const daiStableVariableTokenAddress = ( await helpersContract.getReserveTokensAddresses(dai.address) ).variableDebtTokenAddress; const daiVariableDebtContract = await getContract( eContractid.VariableDebtToken, daiStableVariableTokenAddress ); const userDaiVariableDebtAmountBefore = await daiVariableDebtContract.balanceOf( userAddress ); // Add a % to repay on top of the debt const liquidityToSwap = new BigNumber(amountWETHtoSwap.toString()) .multipliedBy(1.1) .toFixed(0); await aWETH.connect(user).approve(uniswapRepayAdapter.address, liquidityToSwap); const userAEthBalanceBefore = await aWETH.balanceOf(userAddress); // Add a % to repay on top of the debt const amountToRepay = new BigNumber(expectedDaiAmount.toString()) .multipliedBy(1.1) .toFixed(0); await mockUniswapRouter.connect(user).setAmountToSwap(weth.address, amountWETHtoSwap); await mockUniswapRouter.setDefaultMockValue(amountWETHtoSwap); await uniswapRepayAdapter.connect(user).swapAndRepay( weth.address, dai.address, liquidityToSwap, amountToRepay, 2, { amount: 0, deadline: 0, v: 0, r: '0x0000000000000000000000000000000000000000000000000000000000000000', s: '0x0000000000000000000000000000000000000000000000000000000000000000', }, false ); const adapterWethBalance = await weth.balanceOf(uniswapRepayAdapter.address); const adapterDaiBalance = await dai.balanceOf(uniswapRepayAdapter.address); const userDaiVariableDebtAmount = await daiVariableDebtContract.balanceOf(userAddress); const userAEthBalance = await aWETH.balanceOf(userAddress); const adapterAEthBalance = await aWETH.balanceOf(uniswapRepayAdapter.address); expect(adapterAEthBalance).to.be.eq(Zero); expect(adapterWethBalance).to.be.eq(Zero); expect(adapterDaiBalance).to.be.eq(Zero); expect(userDaiVariableDebtAmountBefore).to.be.gte(expectedDaiAmount); expect(userDaiVariableDebtAmount).to.be.eq(Zero); expect(userAEthBalance).to.be.lt(userAEthBalanceBefore); expect(userAEthBalance).to.be.gte(userAEthBalanceBefore.sub(liquidityToSwap)); }); it('should correctly repay debt using the same asset as collateral', async () => { const { users, pool, dai, uniswapRepayAdapter, helpersContract, aDai } = testEnv; const user = users[0].signer; const userAddress = users[0].address; // Add deposit for user await dai.mint(parseEther('30')); await dai.approve(pool.address, parseEther('30')); await pool.deposit(dai.address, parseEther('30'), userAddress, 0); const amountCollateralToSwap = parseEther('4'); const debtAmount = parseEther('3'); // Open user Debt await pool.connect(user).borrow(dai.address, debtAmount, 2, 0, userAddress); const daiVariableDebtTokenAddress = ( await helpersContract.getReserveTokensAddresses(dai.address) ).variableDebtTokenAddress; const daiVariableDebtContract = await getContract( eContractid.StableDebtToken, daiVariableDebtTokenAddress ); const userDaiVariableDebtAmountBefore = await daiVariableDebtContract.balanceOf( userAddress ); await aDai.connect(user).approve(uniswapRepayAdapter.address, amountCollateralToSwap); const userADaiBalanceBefore = await aDai.balanceOf(userAddress); const userDaiBalanceBefore = await dai.balanceOf(userAddress); await uniswapRepayAdapter.connect(user).swapAndRepay( dai.address, dai.address, amountCollateralToSwap, amountCollateralToSwap, 2, { amount: 0, deadline: 0, v: 0, r: '0x0000000000000000000000000000000000000000000000000000000000000000', s: '0x0000000000000000000000000000000000000000000000000000000000000000', }, false ); const adapterDaiBalance = await dai.balanceOf(uniswapRepayAdapter.address); const userDaiVariableDebtAmount = await daiVariableDebtContract.balanceOf(userAddress); const userADaiBalance = await aDai.balanceOf(userAddress); const adapterADaiBalance = await aDai.balanceOf(uniswapRepayAdapter.address); const userDaiBalance = await dai.balanceOf(userAddress); expect(adapterADaiBalance).to.be.eq(Zero, 'adapter aADAI should be zero'); expect(adapterDaiBalance).to.be.eq(Zero, 'adapter DAI should be zero'); expect(userDaiVariableDebtAmountBefore).to.be.gte( debtAmount, 'user dai variable debt before should be gte debtAmount' ); expect(userDaiVariableDebtAmount).to.be.lt( debtAmount, 'current user dai variable debt amount should be less than debtAmount' ); expect(userADaiBalance).to.be.lt( userADaiBalanceBefore, 'current user aDAI balance should be less than prior balance' ); expect(userADaiBalance).to.be.gte( userADaiBalanceBefore.sub(amountCollateralToSwap), 'current user aDAI balance should be gte user balance sub swapped collateral' ); expect(userDaiBalance).to.be.eq( userDaiBalanceBefore, 'user DAI balance should remain equal' ); }); }); }); });