Contract Source Code:
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "openzeppelin-contracts/contracts/security/ReentrancyGuard.sol";
import "openzeppelin-contracts/contracts/token/ERC20/IERC20.sol";
import "openzeppelin-contracts/contracts/token/ERC20/utils/SafeERC20.sol";
import "openzeppelin-contracts-upgradeable/contracts/access/Ownable2StepUpgradeable.sol";
import "openzeppelin-contracts-upgradeable/contracts/proxy/utils/Initializable.sol";
import "openzeppelin-contracts-upgradeable/contracts/proxy/utils/UUPSUpgradeable.sol";
import "./ApeFinanceStorage.sol";
import "../../interfaces/IArbInfo.sol";
import "../../interfaces/IApeFinance.sol";
import "../../interfaces/IAToken.sol";
import "../../interfaces/IDeferLiquidityCheck.sol";
import "../../interfaces/IInterestRateModel.sol";
import "../../interfaces/IPriceOracle.sol";
import "../../interfaces/IPToken.sol";
import "../../libraries/Arrays.sol";
import "../../libraries/DataTypes.sol";
import "../../libraries/PauseFlags.sol";
import "../../libraries/SubAccounts.sol";
contract ApeFinance is
Initializable,
UUPSUpgradeable,
Ownable2StepUpgradeable,
ReentrancyGuard,
ApeFinanceStorage,
IApeFinance
{
using SafeERC20 for IERC20;
using Arrays for address[];
using PauseFlags for DataTypes.MarketConfig;
using SubAccounts for address;
/**
* @notice Initialize the contract.
* @param _admin The address of the admin
*/
function initialize(address _admin) public initializer {
__Ownable_init();
__UUPSUpgradeable_init();
transferOwnership(_admin);
}
/**
* @notice Check if the caller is the market configurator.
*/
modifier onlyMarketConfigurator() {
_checkMarketConfigurator();
_;
}
/**
* @notice Check if the caller is the reserve manager.
*/
modifier onlyReserveManager() {
_checkReserveManager();
_;
}
/**
* @notice Check if the caller is the credit limit manager.
*/
modifier onlyCreditLimitManager() {
require(msg.sender == creditLimitManager, "!manager");
_;
}
/**
* @notice Check if the user has authorized the caller.
*/
modifier isAuthorized(address from) {
_checkAuthorized(from, msg.sender);
_;
}
/* ========== VIEW FUNCTIONS ========== */
/**
* @notice Get all markets.
* @return The list of all markets
*/
function getAllMarkets() public view returns (address[] memory) {
return allMarkets;
}
/**
* @notice Whether or not a market is listed.
* @param market The address of the market to check
* @return true if the market is listed, false otherwise
*/
function isMarketListed(address market) public view returns (bool) {
DataTypes.Market storage m = markets[market];
return m.config.isListed;
}
/**
* @notice Get the exchange rate of a market.
* @param market The address of the market
* @return The exchange rate
*/
function getExchangeRate(address market) public view returns (uint256) {
DataTypes.Market storage m = markets[market];
return _getExchangeRate(m);
}
/**
* @notice Get the total supply of a market.
* @param market The address of the market
* @return The total supply
*/
function getTotalSupply(address market) public view returns (uint256) {
DataTypes.Market storage m = markets[market];
return m.totalSupply;
}
/**
* @notice Get the total borrow of a market.
* @param market The address of the market
* @return The total borrow
*/
function getTotalBorrow(address market) public view returns (uint256) {
DataTypes.Market storage m = markets[market];
return m.totalBorrow;
}
/**
* @notice Get the total cash of a market.
* @param market The address of the market
* @return The total cash
*/
function getTotalCash(address market) public view returns (uint256) {
DataTypes.Market storage m = markets[market];
return m.totalCash;
}
/**
* @notice Get the total reserves of a market.
* @param market The address of the market
* @return The total reserves
*/
function getTotalReserves(address market) public view returns (uint256) {
DataTypes.Market storage m = markets[market];
return m.totalReserves;
}
/**
* @notice Get the borrow balance of a user in a market.
* @param user The address of the user
* @param market The address of the market
* @return The borrow balance
*/
function getBorrowBalance(address user, address market) public view returns (uint256) {
DataTypes.Market storage m = markets[market];
return _getBorrowBalance(m, user);
}
/**
* @notice Get the AToken balance of a user in a market.
* @param user The address of the user
* @param market The address of the market
* @return The AToken balance
*/
function getATokenBalance(address user, address market) public view returns (uint256) {
DataTypes.Market storage m = markets[market];
return m.userSupplies[user];
}
/**
* @notice Get the supply balance of a user in a market.
* @param user The address of the user
* @param market The address of the market
* @return The supply balance
*/
function getSupplyBalance(address user, address market) public view returns (uint256) {
DataTypes.Market storage m = markets[market];
return (m.userSupplies[user] * _getExchangeRate(m)) / 1e18;
}
/**
* @notice Get the account liquidity of a user.
* @param user The address of the user
* @return The total collateral value, liquidation collateral value, and total debt value of the user
*/
function getAccountLiquidity(address user) public view returns (uint256, uint256, uint256) {
return _getAccountLiquidity(user);
}
/**
* @notice Get the user's allowed extensions.
* @param user The address of the user
* @return The list of allowed extensions
*/
function getUserAllowedExtensions(address user) public view returns (address[] memory) {
return allAllowedExtensions[user];
}
/**
* @notice Whether or not a user has allowed an extension.
* @param user The address of the user
* @param extension The address of the extension
* @return true if the user has allowed the extension, false otherwise
*/
function isAllowedExtension(address user, address extension) public view returns (bool) {
return allowedExtensions[user][extension];
}
/**
* @notice Get the credit limit of a user in a market.
* @param user The address of the user
* @param market The address of the market
* @return The credit limit
*/
function getCreditLimit(address user, address market) public view returns (uint256) {
return creditLimits[user][market];
}
/**
* @notice Get the list of all credit markets for a user.
* @param user The address of the user
* @return The list of all credit markets
*/
function getUserCreditMarkets(address user) public view returns (address[] memory) {
return allCreditMarkets[user];
}
/**
* @notice Whether or not an account is a credit account.
* @param user The address of the user
* @return true if the account is a credit account, false otherwise
*/
function isCreditAccount(address user) public view returns (bool) {
return allCreditMarkets[user].length > 0;
}
/**
* @notice Get the configuration of a market.
* @param market The address of the market
* @return The market configuration
*/
function getMarketConfiguration(address market) public view returns (DataTypes.MarketConfig memory) {
return markets[market].config;
}
/**
* @notice Check if an account is liquidatable.
* @param user The address of the account to check
* @return true if the account is liquidatable, false otherwise
*/
function isUserLiquidatable(address user) public view returns (bool) {
return _isLiquidatable(user);
}
/**
* @notice Calculate the amount of aToken that can be seized in a liquidation.
* @param marketBorrow The address of the market being borrowed from
* @param marketCollateral The address of the market being used as collateral
* @param repayAmount The amount of the borrowed asset being repaid
* @return The amount of aToken that can be seized
*/
function calculateLiquidationOpportunity(address marketBorrow, address marketCollateral, uint256 repayAmount)
public
view
returns (uint256)
{
DataTypes.Market storage mCollateral = markets[marketCollateral];
DataTypes.Market storage mBorrow = markets[marketCollateral];
return _getLiquidationSeizeAmount(marketBorrow, marketCollateral, mBorrow, mCollateral, repayAmount);
}
/* ========== MUTATIVE FUNCTIONS ========== */
/**
* @notice Accrue the interest of a market.
* @param market The address of the market
*/
function accrueInterest(address market) external {
DataTypes.Market storage m = markets[market];
require(m.config.isListed, "not listed");
_accrueInterest(market, m);
}
/**
* @notice Check the account liquidity of a user.
* @param user The address of the user
*/
function checkAccountLiquidity(address user) public {
_checkAccountLiquidity(user);
}
/**
* @notice Supply an amount of asset to ApeFinance.
* @param from The address which will supply the asset
* @param to The address which will hold the balance
* @param market The address of the market
* @param amount The amount of asset to supply
*/
function supply(address from, address to, address market, uint256 amount)
external
nonReentrant
isAuthorized(from)
{
DataTypes.Market storage m = markets[market];
require(m.config.isListed, "not listed");
require(!m.config.isSupplyPaused(), "supply paused");
require(!isCreditAccount(to), "cannot supply to credit account");
_accrueInterest(market, m);
if (m.config.supplyCap != 0) {
uint256 totalSupplyUnderlying = m.totalSupply * _getExchangeRate(m) / 1e18;
require(totalSupplyUnderlying + amount <= m.config.supplyCap, "supply cap reached");
}
uint256 aTokenAmount = (amount * 1e18) / _getExchangeRate(m);
require(aTokenAmount > 0, "zero aToken amount");
// Update storage.
m.totalCash += amount;
m.totalSupply += aTokenAmount;
m.userSupplies[to] += aTokenAmount;
// Enter the market.
if (amount > 0) {
_enterMarket(market, to);
}
IAToken(m.config.aTokenAddress).mint(to, aTokenAmount); // Only emits Transfer event.
IERC20(market).safeTransferFrom(from, address(this), amount);
emit Supply(market, from, to, amount, aTokenAmount);
}
/**
* @notice Borrow an amount of asset from ApeFinance.
* @param from The address which will borrow the asset
* @param to The address which will receive the token
* @param market The address of the market
* @param amount The amount of asset to borrow
*/
function borrow(address from, address to, address market, uint256 amount)
external
nonReentrant
isAuthorized(from)
{
DataTypes.Market storage m = markets[market];
require(m.config.isListed, "not listed");
require(!m.config.isBorrowPaused(), "borrow paused");
require(m.totalCash >= amount, "insufficient cash");
_accrueInterest(market, m);
uint256 newTotalBorrow = m.totalBorrow + amount;
uint256 newUserBorrowBalance = _getBorrowBalance(m, from) + amount;
if (m.config.borrowCap != 0) {
require(newTotalBorrow <= m.config.borrowCap, "borrow cap reached");
}
// Update storage.
m.totalCash -= amount;
m.totalBorrow = newTotalBorrow;
m.userBorrows[from].borrowBalance = newUserBorrowBalance;
m.userBorrows[from].borrowIndex = m.borrowIndex;
// Enter the market.
if (amount > 0) {
_enterMarket(market, from);
}
IERC20(market).safeTransfer(to, amount);
if (isCreditAccount(from)) {
require(from == to, "credit account can only borrow to itself");
require(creditLimits[from][market] >= newUserBorrowBalance, "insufficient credit limit");
} else {
_checkAccountLiquidity(from);
}
emit Borrow(market, from, to, amount, newUserBorrowBalance, newTotalBorrow);
}
/**
* @notice Redeem an amount of asset from ApeFinance.
* @param from The address which will redeem the asset
* @param to The address which will receive the token
* @param market The address of the market
* @param amount The amount of asset to redeem, or type(uint256).max for max
* @return The actual amount of asset redeemed
*/
function redeem(address from, address to, address market, uint256 amount)
external
nonReentrant
isAuthorized(from)
returns (uint256)
{
DataTypes.Market storage m = markets[market];
require(m.config.isListed, "not listed");
_accrueInterest(market, m);
uint256 userSupply = m.userSupplies[from];
uint256 totalCash = m.totalCash;
uint256 aTokenAmount;
if (amount == type(uint256).max) {
aTokenAmount = userSupply;
amount = (aTokenAmount * _getExchangeRate(m)) / 1e18;
} else {
aTokenAmount = (amount * 1e18) / _getExchangeRate(m);
}
require(aTokenAmount > 0, "zero aToken amount");
require(userSupply >= aTokenAmount, "insufficient balance");
require(totalCash >= amount, "insufficient cash");
uint256 newUserSupply = userSupply - aTokenAmount;
// Update storage.
m.userSupplies[from] = newUserSupply;
m.totalCash = totalCash - amount;
m.totalSupply -= aTokenAmount;
// Check if need to exit the market.
if (newUserSupply == 0 && _getBorrowBalance(m, from) == 0) {
_exitMarket(market, from);
}
IAToken(m.config.aTokenAddress).burn(from, aTokenAmount); // Only emits Transfer event.
IERC20(market).safeTransfer(to, amount);
_checkAccountLiquidity(from);
emit Redeem(market, from, to, amount, aTokenAmount);
return amount;
}
/**
* @notice Repay an amount of asset to ApeFinance.
* @param from The address which will repay the asset
* @param to The address which will hold the balance
* @param market The address of the market
* @param amount The amount of asset to repay, or type(uint256).max for max
* @return The actual amount of asset repaid
*/
function repay(address from, address to, address market, uint256 amount)
external
nonReentrant
isAuthorized(from)
returns (uint256)
{
DataTypes.Market storage m = markets[market];
require(m.config.isListed, "not listed");
if (isCreditAccount(to)) {
require(from == to, "credit account can only repay for itself");
}
_accrueInterest(market, m);
return _repay(m, from, to, market, amount);
}
/**
* @notice Liquidate an undercollateralized borrower.
* @param liquidator The address which will liquidate the borrower
* @param borrower The address of the borrower
* @param marketBorrow The address of the borrow market
* @param marketCollateral The address of the collateral market
* @param repayAmount The amount of asset to repay, or type(uint256).max for max
* @return The actual amount of asset repaid and the amount of collateral seized
*/
function liquidate(
address liquidator,
address borrower,
address marketBorrow,
address marketCollateral,
uint256 repayAmount
) external nonReentrant isAuthorized(liquidator) returns (uint256, uint256) {
DataTypes.Market storage mBorrow = markets[marketBorrow];
DataTypes.Market storage mCollateral = markets[marketCollateral];
require(mBorrow.config.isListed, "borrow market not listed");
require(mCollateral.config.isListed, "collateral market not listed");
require(_isMarketSeizable(mCollateral), "collateral market cannot be seized");
require(!isCreditAccount(liquidator) && !isCreditAccount(borrower), "cannot liquidate credit account");
require(liquidator != borrower, "cannot self liquidate");
_accrueInterest(marketBorrow, mBorrow);
_accrueInterest(marketCollateral, mCollateral);
// Check if the borrower is actually liquidatable.
require(_isLiquidatable(borrower), "borrower not liquidatable");
// Repay the debt.
repayAmount = _repay(mBorrow, liquidator, borrower, marketBorrow, repayAmount);
// Seize the collateral.
uint256 aTokenAmount =
_getLiquidationSeizeAmount(marketBorrow, marketCollateral, mBorrow, mCollateral, repayAmount);
_transferAToken(marketCollateral, mCollateral, borrower, liquidator, aTokenAmount);
IAToken(mCollateral.config.aTokenAddress).seize(borrower, liquidator, aTokenAmount); // Only emits Transfer event.
emit Liquidate(liquidator, borrower, marketBorrow, marketCollateral, repayAmount, aTokenAmount);
return (repayAmount, aTokenAmount);
}
/**
* @notice Defer the liquidity check to a user.
* @dev The message sender must implement the IDeferLiquidityCheck.
* @param user The address of the user
* @param data The data to pass to the callback
*/
function deferLiquidityCheck(address user, bytes memory data) external isAuthorized(user) {
require(!isCreditAccount(user), "credit account cannot defer liquidity check");
require(liquidityCheckStatus[user] == LIQUIDITY_CHECK_NORMAL, "reentry defer liquidity check");
liquidityCheckStatus[user] = LIQUIDITY_CHECK_DEFERRED;
IDeferLiquidityCheck(msg.sender).onDeferredLiquidityCheck(data);
uint8 status = liquidityCheckStatus[user];
liquidityCheckStatus[user] = LIQUIDITY_CHECK_NORMAL;
if (status == LIQUIDITY_CHECK_DIRTY) {
_checkAccountLiquidity(user);
}
}
/**
* @notice User enables or disables an extension.
* @param extension The address of the extension
* @param allowed Whether to allow or disallow the extension
*/
function setUserExtension(address extension, bool allowed) external {
_setAccountExtension(msg.sender, extension, allowed);
}
/**
* @notice Set the extension for a sub account.
* @param primary The address of the primary account
* @param subAccountId The ID of the sub account
* @param allowed Whether to allow or disallow the extension
*/
function setSubAccountExtension(address primary, uint256 subAccountId, bool allowed)
external
isAuthorized(primary)
{
address account = primary.getSubAccount(subAccountId);
_setAccountExtension(account, msg.sender, allowed);
}
/**
* @notice Transfer AToken from one account to another.
* @dev This function is callable by the AToken contract only.
* @param market The address of the market
* @param from The address to transfer from
* @param to The address to transfer to
* @param amount The amount to transfer
*/
function transferAToken(address market, address from, address to, uint256 amount) external {
DataTypes.Market storage m = markets[market];
require(m.config.isListed, "not listed");
require(msg.sender == m.config.aTokenAddress, "!authorized");
require(!m.config.isTransferPaused(), "transfer paused");
require(from != to, "cannot self transfer");
require(!isCreditAccount(to), "cannot transfer to credit account");
_accrueInterest(market, m);
_transferAToken(market, m, from, to, amount);
_checkAccountLiquidity(from);
}
function configureYieldMode() external {
IArbInfo(ARB_INFO_CONTRACT).configureAutomaticYield();
}
/* ========== RESTRICTED FUNCTIONS ========== */
/**
* @notice List a market.
* @dev This function is callable by the market configurator only.
* @param market The address of the market
* @param config The market configuration
*/
function listMarket(address market, DataTypes.MarketConfig calldata config) external onlyMarketConfigurator {
DataTypes.Market storage m = markets[market];
m.lastUpdateTimestamp = _getNow();
m.borrowIndex = INITIAL_BORROW_INDEX;
m.config = config;
allMarkets.push(market);
emit MarketListed(market, m.lastUpdateTimestamp, m.config);
}
/**
* @notice Delist a market.
* @dev This function is callable by the market configurator only.
* @param market The address of the market
*/
function delistMarket(address market) external onlyMarketConfigurator {
DataTypes.Market storage m = markets[market];
// The nested mapping like userBorrows can't be deleted completely, so we just set `isListed` to false.
m.config.isListed = false;
// `isDelisted` is needed to distinguish delisted markets from markets that have never been listed before.
m.config.isDelisted = true;
allMarkets.deleteElement(market);
emit MarketDelisted(market);
}
/**
* @notice Set the market configuration.
* @dev This function is callable by the market configurator only.
* @param market The address of the market
* @param config The market configuration
*/
function setMarketConfiguration(address market, DataTypes.MarketConfig calldata config)
external
onlyMarketConfigurator
{
DataTypes.Market storage m = markets[market];
m.config = config;
emit MarketConfigurationChanged(market, config);
}
/**
* @notice Set the credit limit for a user in a market.
* @dev This function is callable by the credit limit manager only.
* @param user The address of the user
* @param market The address of the market
* @param credit The credit limit
*/
function setCreditLimit(address user, address market, uint256 credit) external onlyCreditLimitManager {
DataTypes.Market storage m = markets[market];
require(m.config.isListed, "not listed");
if (credit == 0 && creditLimits[user][market] != 0) {
allCreditMarkets[user].deleteElement(market);
} else if (credit != 0 && creditLimits[user][market] == 0) {
allCreditMarkets[user].push(market);
}
creditLimits[user][market] = credit;
emit CreditLimitChanged(user, market, credit);
}
/**
* @notice Increase reserves by absorbing the surplus cash.
* @dev This function is callable by the reserve manager only.
* @param market The address of the market
*/
function absorbToReserves(address market) external onlyReserveManager {
DataTypes.Market storage m = markets[market];
require(m.config.isListed, "not listed");
_accrueInterest(market, m);
uint256 amount = IERC20(market).balanceOf(address(this)) - m.totalCash;
if (amount > 0) {
uint256 aTokenAmount = (amount * 1e18) / _getExchangeRate(m);
// Update internal cash, and total reserves.
m.totalCash += amount;
m.totalReserves += aTokenAmount;
emit ReservesIncreased(market, aTokenAmount, amount);
}
}
/**
* @notice Reduce reserves by withdrawing the requested amount.
* @dev This function is callable by the reserve manager only.
* @param market The address of the market
* @param aTokenAmount The amount of aToken to withdraw
* @param recipient The address which will receive the underlying asset
*/
function reduceReserves(address market, uint256 aTokenAmount, address recipient) external onlyReserveManager {
DataTypes.Market storage m = markets[market];
require(m.config.isListed, "not listed");
_accrueInterest(market, m);
uint256 amount = (aTokenAmount * _getExchangeRate(m)) / 1e18;
require(m.totalCash >= amount, "insufficient cash");
require(m.totalReserves >= aTokenAmount, "insufficient reserves");
// Update internal cash, and total reserves.
unchecked {
m.totalCash -= amount;
m.totalReserves -= aTokenAmount;
}
IERC20(market).safeTransfer(recipient, amount);
emit ReservesDecreased(market, recipient, aTokenAmount, amount);
}
/**
* @notice Set the price oracle.
* @param oracle The address of the price oracle
*/
function setPriceOracle(address oracle) external onlyOwner {
priceOracle = oracle;
emit PriceOracleSet(oracle);
}
/**
* @notice Set the market configurator.
* @param configurator The address of the market configurator
*/
function setMarketConfigurator(address configurator) external onlyOwner {
marketConfigurator = configurator;
emit MarketConfiguratorSet(configurator);
}
/**
* @notice Set the credit limit manager.
* @param manager The address of the credit limit manager
*/
function setCreditLimitManager(address manager) external onlyOwner {
creditLimitManager = manager;
emit CreditLimitManagerSet(manager);
}
/**
* @notice Set the reserve manager.
* @param manager The address of the reserve manager
*/
function setReserveManager(address manager) external onlyOwner {
reserveManager = manager;
emit ReserveManagerSet(manager);
}
/**
* @notice Seize the unlisted token.
* @param token The address of the token
* @param recipient The address which will receive the token
*/
function seize(address token, address recipient) external onlyOwner {
DataTypes.Market storage m = markets[token];
require(!m.config.isListed, "cannot seize listed market");
uint256 balance = IERC20(token).balanceOf(address(this));
if (balance > 0) {
IERC20(token).safeTransfer(recipient, balance);
emit TokenSeized(token, recipient, balance);
}
}
/* ========== INTERNAL FUNCTIONS ========== */
/**
* @dev _authorizeUpgrade is used by UUPSUpgradeable to determine if it's allowed to upgrade a proxy implementation.
* @param newImplementation The new implementation
*
* Ref: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/proxy/utils/UUPSUpgradeable.sol
*/
function _authorizeUpgrade(address newImplementation) internal override onlyOwner {}
/**
* @dev Get the current timestamp.
* @return The current timestamp, casted to uint40
*/
function _getNow() internal view virtual returns (uint40) {
require(block.timestamp < 2 ** 40, "timestamp too large");
return uint40(block.timestamp);
}
/**
* @dev Check if the operator is authorized.
* @param from The address of the user
* @param operator The address of the operator
*/
function _checkAuthorized(address from, address operator) internal view {
require(from == operator || (!isCreditAccount(from) && isAllowedExtension(from, operator)), "!authorized");
}
/**
* @dev Check if the message sender is the market configurator.
*/
function _checkMarketConfigurator() internal view {
require(msg.sender == marketConfigurator, "!configurator");
}
/**
* @dev Check if the message sender is the credit limit manager.
*/
function _checkReserveManager() internal view {
require(msg.sender == reserveManager, "!reserveManager");
}
/**
* @dev Get the exchange rate.
* @param m The storage of the market
* @return The exchange rate
*/
function _getExchangeRate(DataTypes.Market storage m) internal view returns (uint256) {
uint256 totalSupplyPlusReserves = m.totalSupply + m.totalReserves;
if (totalSupplyPlusReserves == 0) {
return m.config.initialExchangeRate;
}
return ((m.totalCash + m.totalBorrow) * 1e18) / totalSupplyPlusReserves;
}
/**
* @dev Get the amount of aToken that can be seized in a liquidation.
* @param marketBorrow The address of the market being borrowed from
* @param marketCollateral The address of the market being used as collateral
* @param mBorrow The storage of the borrow market
* @param mCollateral The storage of the collateral market
* @param repayAmount The amount of the borrowed asset being repaid
* @return The amount of aToken that can be seized
*/
function _getLiquidationSeizeAmount(
address marketBorrow,
address marketCollateral,
DataTypes.Market storage mBorrow,
DataTypes.Market storage mCollateral,
uint256 repayAmount
) internal view returns (uint256) {
uint256 borrowMarketPrice = _getMarketPrice(mBorrow, marketBorrow);
uint256 collateralMarketPrice = _getMarketPrice(mCollateral, marketCollateral);
// collateral amount = repayAmount * liquidationBonus * borrowMarketPrice / collateralMarketPrice
// AToken amount = collateral amount / exchangeRate
// = repayAmount * (liquidationBonus * borrowMarketPrice) / (collateralMarketPrice * exchangeRate)
uint256 numerator = (mCollateral.config.liquidationBonus * borrowMarketPrice) / FACTOR_SCALE;
uint256 denominator = (_getExchangeRate(mCollateral) * collateralMarketPrice) / 1e18;
return (repayAmount * numerator) / denominator;
}
/**
* @dev Get the borrow balance of a user.
* @param m The storage of the market
* @param user The address of the user
* @return The borrow balance
*/
function _getBorrowBalance(DataTypes.Market storage m, address user) internal view returns (uint256) {
DataTypes.UserBorrow memory b = m.userBorrows[user];
if (b.borrowBalance == 0) {
return 0;
}
// borrowBalanceWithInterests = borrowBalance * marketBorrowIndex / userBorrowIndex
return (b.borrowBalance * m.borrowIndex) / b.borrowIndex;
}
/**
* @dev Transfer AToken from one account to another.
* @param market The address of the market
* @param m The storage of the market
* @param from The address to transfer from
* @param to The address to transfer to
* @param amount The amount to transfer
*/
function _transferAToken(address market, DataTypes.Market storage m, address from, address to, uint256 amount)
internal
{
require(from != address(0), "transfer from the zero address");
require(to != address(0), "transfer to the zero address");
uint256 fromBalance = m.userSupplies[from];
require(amount > 0, "transfer zero amount");
require(fromBalance >= amount, "transfer amount exceeds balance");
_enterMarket(market, to);
unchecked {
m.userSupplies[from] = fromBalance - amount;
// Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
// decrementing then incrementing.
m.userSupplies[to] += amount;
}
if (m.userSupplies[from] == 0 && _getBorrowBalance(m, from) == 0) {
_exitMarket(market, from);
}
emit TransferAToken(market, from, to, amount);
}
/**
* @dev Accrue interest to the current timestamp.
* @param market The address of the market
* @param m The storage of the market
*/
function _accrueInterest(address market, DataTypes.Market storage m) internal {
uint40 timestamp = _getNow();
uint256 timeElapsed = uint256(timestamp - m.lastUpdateTimestamp);
if (timeElapsed > 0) {
uint256 totalCash = m.totalCash;
uint256 borrowIndex = m.borrowIndex;
uint256 totalBorrow = m.totalBorrow;
uint256 totalSupply = m.totalSupply;
uint256 totalReserves = m.totalReserves;
uint256 borrowRatePerSecond =
IInterestRateModel(m.config.interestRateModelAddress).getBorrowRate(totalCash, totalBorrow);
uint256 interestFactor = borrowRatePerSecond * timeElapsed;
uint256 interestIncreased = (interestFactor * totalBorrow) / 1e18;
uint256 feeIncreased = (interestIncreased * m.config.reserveFactor) / FACTOR_SCALE;
// Compute reservesIncreased.
uint256 reservesIncreased = 0;
if (feeIncreased > 0) {
reservesIncreased = (feeIncreased * (totalSupply + totalReserves))
/ (totalCash + totalBorrow + (interestIncreased - feeIncreased));
}
// Compute new states.
borrowIndex += (interestFactor * borrowIndex) / 1e18;
totalBorrow += interestIncreased;
totalReserves += reservesIncreased;
// Update state variables.
m.lastUpdateTimestamp = timestamp;
m.borrowIndex = borrowIndex;
m.totalBorrow = totalBorrow;
m.totalReserves = totalReserves;
emit InterestAccrued(market, timestamp, borrowRatePerSecond, borrowIndex, totalBorrow, totalReserves);
}
}
/**
* @dev Enter a market.
* @param market The address of the market
* @param user The address of the user
*/
function _enterMarket(address market, address user) internal {
if (enteredMarkets[user][market]) {
// Skip if user has entered the market.
return;
}
enteredMarkets[user][market] = true;
allEnteredMarkets[user].push(market);
emit MarketEntered(market, user);
}
/**
* @dev Exit a market.
* @param market The address of the market
* @param user The address of the user
*/
function _exitMarket(address market, address user) internal {
if (!enteredMarkets[user][market]) {
// Skip if user has not entered the market.
return;
}
enteredMarkets[user][market] = false;
allEnteredMarkets[user].deleteElement(market);
emit MarketExited(market, user);
}
/**
* @dev Repay an amount of asset to ApeFinance.
* @param m The market object
* @param from The address which will repay the asset
* @param to The address which will hold the balance
* @param market The address of the market
* @param amount The amount of asset to repay, or type(uint256).max for max
* @return The actual amount repaid
*/
function _repay(DataTypes.Market storage m, address from, address to, address market, uint256 amount)
internal
returns (uint256)
{
uint256 borrowBalance = _getBorrowBalance(m, to);
if (amount == type(uint256).max) {
amount = borrowBalance;
}
require(amount <= borrowBalance, "repay too much");
uint256 newUserBorrowBalance = borrowBalance - amount;
uint256 newTotalBorrow = m.totalBorrow - amount;
// Update storage.
m.userBorrows[to].borrowBalance = newUserBorrowBalance;
m.userBorrows[to].borrowIndex = m.borrowIndex;
m.totalCash += amount;
m.totalBorrow = newTotalBorrow;
// Check if need to exit the market.
if (m.userSupplies[to] == 0 && newUserBorrowBalance == 0) {
_exitMarket(market, to);
}
IERC20(market).safeTransferFrom(from, address(this), amount);
emit Repay(market, from, to, amount, newUserBorrowBalance, newTotalBorrow);
return amount;
}
/**
* @dev Check the account liquidity of a user. If the account liquidity check is deferred, mark the status to dirty. It must be checked later.
* @param user The address of the user
*/
function _checkAccountLiquidity(address user) internal {
uint8 status = liquidityCheckStatus[user];
if (status == LIQUIDITY_CHECK_NORMAL) {
(uint256 collateralValue,, uint256 debtValue) = _getAccountLiquidity(user);
require(collateralValue >= debtValue, "insufficient collateral");
} else if (status == LIQUIDITY_CHECK_DEFERRED) {
liquidityCheckStatus[user] = LIQUIDITY_CHECK_DIRTY;
}
}
/**
* @dev Get the account liquidity of a user.
* @param user The address of the user
* @return The total collateral value, liquidation collateral value, and total debt value of the user
*/
function _getAccountLiquidity(address user) internal view returns (uint256, uint256, uint256) {
uint256 collateralValue;
uint256 liquidationCollateralValue;
uint256 debtValue;
address[] memory userEnteredMarkets = allEnteredMarkets[user];
for (uint256 i = 0; i < userEnteredMarkets.length; i++) {
DataTypes.Market storage m = markets[userEnteredMarkets[i]];
if (!m.config.isListed) {
continue;
}
uint256 supplyBalance = m.userSupplies[user];
uint256 borrowBalance = _getBorrowBalance(m, user);
uint256 assetPrice = _getMarketPrice(m, userEnteredMarkets[i]);
uint256 collateralFactor = m.config.collateralFactor;
uint256 liquidationThreshold = m.config.liquidationThreshold;
if (supplyBalance > 0 && collateralFactor > 0) {
uint256 exchangeRate = _getExchangeRate(m);
collateralValue += (supplyBalance * exchangeRate * assetPrice * collateralFactor) / 1e36 / FACTOR_SCALE;
liquidationCollateralValue +=
(supplyBalance * exchangeRate * assetPrice * liquidationThreshold) / 1e36 / FACTOR_SCALE;
}
if (borrowBalance > 0) {
debtValue += (borrowBalance * assetPrice) / 1e18;
}
}
return (collateralValue, liquidationCollateralValue, debtValue);
}
/**
* @dev Check if an account is liquidatable.
* @param user The address of the account to check
* @return true if the account is liquidatable, false otherwise
*/
function _isLiquidatable(address user) internal view returns (bool) {
(, uint256 liquidationCollateralValue, uint256 debtValue) = _getAccountLiquidity(user);
return debtValue > liquidationCollateralValue;
}
/**
* @dev Check if a market is seizable when a liquidation happens.
* @param m The market object
* @return true if the market is seizable, false otherwise
*/
function _isMarketSeizable(DataTypes.Market storage m) internal view returns (bool) {
return !m.config.isTransferPaused() && m.config.liquidationThreshold > 0;
}
/**
* @dev Get the market price from the price oracle. If the market is a pToken, use its underlying to get the price.
* @param m The market object
* @param market The address of the market
* @return The market price
*/
function _getMarketPrice(DataTypes.Market storage m, address market) internal view returns (uint256) {
address asset = m.config.isPToken ? IPToken(market).getUnderlying() : market;
uint256 assetPrice = IPriceOracle(priceOracle).getPrice(asset);
require(assetPrice > 0, "invalid price");
return assetPrice;
}
/**
* @dev Set the extension for an account.
* @param account The address of the account
* @param extension The address of the extension
* @param allowed Whether to allow or disallow the extension
*/
function _setAccountExtension(address account, address extension, bool allowed) internal {
if (allowed && !allowedExtensions[account][extension]) {
allowedExtensions[account][extension] = true;
allAllowedExtensions[account].push(extension);
emit ExtensionAdded(account, extension);
} else if (!allowed && allowedExtensions[account][extension]) {
allowedExtensions[account][extension] = false;
allAllowedExtensions[account].deleteElement(extension);
emit ExtensionRemoved(account, extension);
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)
pragma solidity ^0.8.0;
/**
* @dev Contract module that helps prevent reentrant calls to a function.
*
* Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
* available, which can be applied to functions to make sure there are no nested
* (reentrant) calls to them.
*
* Note that because there is a single `nonReentrant` guard, functions marked as
* `nonReentrant` may not call one another. This can be worked around by making
* those functions `private`, and then adding `external` `nonReentrant` entry
* points to them.
*
* TIP: If you would like to learn more about reentrancy and alternative ways
* to protect against it, check out our blog post
* https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
*/
abstract contract ReentrancyGuard {
// Booleans are more expensive than uint256 or any type that takes up a full
// word because each write operation emits an extra SLOAD to first read the
// slot's contents, replace the bits taken up by the boolean, and then write
// back. This is the compiler's defense against contract upgrades and
// pointer aliasing, and it cannot be disabled.
// The values being non-zero value makes deployment a bit more expensive,
// but in exchange the refund on every call to nonReentrant will be lower in
// amount. Since refunds are capped to a percentage of the total
// transaction's gas, it is best to keep them low in cases like this one, to
// increase the likelihood of the full refund coming into effect.
uint256 private constant _NOT_ENTERED = 1;
uint256 private constant _ENTERED = 2;
uint256 private _status;
constructor() {
_status = _NOT_ENTERED;
}
/**
* @dev Prevents a contract from calling itself, directly or indirectly.
* Calling a `nonReentrant` function from another `nonReentrant`
* function is not supported. It is possible to prevent this from happening
* by making the `nonReentrant` function external, and making it call a
* `private` function that does the actual work.
*/
modifier nonReentrant() {
_nonReentrantBefore();
_;
_nonReentrantAfter();
}
function _nonReentrantBefore() private {
// On the first call to nonReentrant, _status will be _NOT_ENTERED
require(_status != _ENTERED, "ReentrancyGuard: reentrant call");
// Any calls to nonReentrant after this point will fail
_status = _ENTERED;
}
function _nonReentrantAfter() private {
// By storing the original value once again, a refund is triggered (see
// https://eips.ethereum.org/EIPS/eip-2200)
_status = _NOT_ENTERED;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev Returns the amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 amount) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(
address from,
address to,
uint256 amount
) external returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
import "../IERC20.sol";
import "../extensions/draft-IERC20Permit.sol";
import "../../../utils/Address.sol";
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(
IERC20 token,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(
IERC20 token,
address from,
address to,
uint256 value
) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(
IERC20 token,
address spender,
uint256 value
) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(
IERC20 token,
address spender,
uint256 value
) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
function safePermit(
IERC20Permit token,
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) internal {
uint256 nonceBefore = token.nonces(owner);
token.permit(owner, spender, value, deadline, v, r, s);
uint256 nonceAfter = token.nonces(owner);
require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (access/Ownable2Step.sol)
pragma solidity ^0.8.0;
import "./OwnableUpgradeable.sol";
import "../proxy/utils/Initializable.sol";
/**
* @dev Contract module which provides access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership} and {acceptOwnership}.
*
* This module is used through inheritance. It will make available all functions
* from parent (Ownable).
*/
abstract contract Ownable2StepUpgradeable is Initializable, OwnableUpgradeable {
function __Ownable2Step_init() internal onlyInitializing {
__Ownable_init_unchained();
}
function __Ownable2Step_init_unchained() internal onlyInitializing {
}
address private _pendingOwner;
event OwnershipTransferStarted(address indexed previousOwner, address indexed newOwner);
/**
* @dev Returns the address of the pending owner.
*/
function pendingOwner() public view virtual returns (address) {
return _pendingOwner;
}
/**
* @dev Starts the ownership transfer of the contract to a new account. Replaces the pending transfer if there is one.
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual override onlyOwner {
_pendingOwner = newOwner;
emit OwnershipTransferStarted(owner(), newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`) and deletes any pending owner.
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual override {
delete _pendingOwner;
super._transferOwnership(newOwner);
}
/**
* @dev The new owner accepts the ownership transfer.
*/
function acceptOwnership() external {
address sender = _msgSender();
require(pendingOwner() == sender, "Ownable2Step: caller is not the new owner");
_transferOwnership(sender);
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.1) (proxy/utils/Initializable.sol)
pragma solidity ^0.8.2;
import "../../utils/AddressUpgradeable.sol";
/**
* @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed
* behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an
* external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer
* function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.
*
* The initialization functions use a version number. Once a version number is used, it is consumed and cannot be
* reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in
* case an upgrade adds a module that needs to be initialized.
*
* For example:
*
* [.hljs-theme-light.nopadding]
* ```
* contract MyToken is ERC20Upgradeable {
* function initialize() initializer public {
* __ERC20_init("MyToken", "MTK");
* }
* }
* contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {
* function initializeV2() reinitializer(2) public {
* __ERC20Permit_init("MyToken");
* }
* }
* ```
*
* TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as
* possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.
*
* CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure
* that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.
*
* [CAUTION]
* ====
* Avoid leaving a contract uninitialized.
*
* An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation
* contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke
* the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:
*
* [.hljs-theme-light.nopadding]
* ```
* /// @custom:oz-upgrades-unsafe-allow constructor
* constructor() {
* _disableInitializers();
* }
* ```
* ====
*/
abstract contract Initializable {
/**
* @dev Indicates that the contract has been initialized.
* @custom:oz-retyped-from bool
*/
uint8 private _initialized;
/**
* @dev Indicates that the contract is in the process of being initialized.
*/
bool private _initializing;
/**
* @dev Triggered when the contract has been initialized or reinitialized.
*/
event Initialized(uint8 version);
/**
* @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,
* `onlyInitializing` functions can be used to initialize parent contracts.
*
* Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a
* constructor.
*
* Emits an {Initialized} event.
*/
modifier initializer() {
bool isTopLevelCall = !_initializing;
require(
(isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),
"Initializable: contract is already initialized"
);
_initialized = 1;
if (isTopLevelCall) {
_initializing = true;
}
_;
if (isTopLevelCall) {
_initializing = false;
emit Initialized(1);
}
}
/**
* @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the
* contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be
* used to initialize parent contracts.
*
* A reinitializer may be used after the original initialization step. This is essential to configure modules that
* are added through upgrades and that require initialization.
*
* When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`
* cannot be nested. If one is invoked in the context of another, execution will revert.
*
* Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in
* a contract, executing them in the right order is up to the developer or operator.
*
* WARNING: setting the version to 255 will prevent any future reinitialization.
*
* Emits an {Initialized} event.
*/
modifier reinitializer(uint8 version) {
require(!_initializing && _initialized < version, "Initializable: contract is already initialized");
_initialized = version;
_initializing = true;
_;
_initializing = false;
emit Initialized(version);
}
/**
* @dev Modifier to protect an initialization function so that it can only be invoked by functions with the
* {initializer} and {reinitializer} modifiers, directly or indirectly.
*/
modifier onlyInitializing() {
require(_initializing, "Initializable: contract is not initializing");
_;
}
/**
* @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.
* Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized
* to any version. It is recommended to use this to lock implementation contracts that are designed to be called
* through proxies.
*
* Emits an {Initialized} event the first time it is successfully executed.
*/
function _disableInitializers() internal virtual {
require(!_initializing, "Initializable: contract is initializing");
if (_initialized < type(uint8).max) {
_initialized = type(uint8).max;
emit Initialized(type(uint8).max);
}
}
/**
* @dev Returns the highest version that has been initialized. See {reinitializer}.
*/
function _getInitializedVersion() internal view returns (uint8) {
return _initialized;
}
/**
* @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.
*/
function _isInitializing() internal view returns (bool) {
return _initializing;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (proxy/utils/UUPSUpgradeable.sol)
pragma solidity ^0.8.0;
import "../../interfaces/draft-IERC1822Upgradeable.sol";
import "../ERC1967/ERC1967UpgradeUpgradeable.sol";
import "./Initializable.sol";
/**
* @dev An upgradeability mechanism designed for UUPS proxies. The functions included here can perform an upgrade of an
* {ERC1967Proxy}, when this contract is set as the implementation behind such a proxy.
*
* A security mechanism ensures that an upgrade does not turn off upgradeability accidentally, although this risk is
* reinstated if the upgrade retains upgradeability but removes the security mechanism, e.g. by replacing
* `UUPSUpgradeable` with a custom implementation of upgrades.
*
* The {_authorizeUpgrade} function must be overridden to include access restriction to the upgrade mechanism.
*
* _Available since v4.1._
*/
abstract contract UUPSUpgradeable is Initializable, IERC1822ProxiableUpgradeable, ERC1967UpgradeUpgradeable {
function __UUPSUpgradeable_init() internal onlyInitializing {
}
function __UUPSUpgradeable_init_unchained() internal onlyInitializing {
}
/// @custom:oz-upgrades-unsafe-allow state-variable-immutable state-variable-assignment
address private immutable __self = address(this);
/**
* @dev Check that the execution is being performed through a delegatecall call and that the execution context is
* a proxy contract with an implementation (as defined in ERC1967) pointing to self. This should only be the case
* for UUPS and transparent proxies that are using the current contract as their implementation. Execution of a
* function through ERC1167 minimal proxies (clones) would not normally pass this test, but is not guaranteed to
* fail.
*/
modifier onlyProxy() {
require(address(this) != __self, "Function must be called through delegatecall");
require(_getImplementation() == __self, "Function must be called through active proxy");
_;
}
/**
* @dev Check that the execution is not being performed through a delegate call. This allows a function to be
* callable on the implementing contract but not through proxies.
*/
modifier notDelegated() {
require(address(this) == __self, "UUPSUpgradeable: must not be called through delegatecall");
_;
}
/**
* @dev Implementation of the ERC1822 {proxiableUUID} function. This returns the storage slot used by the
* implementation. It is used to validate the implementation's compatibility when performing an upgrade.
*
* IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
* bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
* function revert if invoked through a proxy. This is guaranteed by the `notDelegated` modifier.
*/
function proxiableUUID() external view virtual override notDelegated returns (bytes32) {
return _IMPLEMENTATION_SLOT;
}
/**
* @dev Upgrade the implementation of the proxy to `newImplementation`.
*
* Calls {_authorizeUpgrade}.
*
* Emits an {Upgraded} event.
*/
function upgradeTo(address newImplementation) external virtual onlyProxy {
_authorizeUpgrade(newImplementation);
_upgradeToAndCallUUPS(newImplementation, new bytes(0), false);
}
/**
* @dev Upgrade the implementation of the proxy to `newImplementation`, and subsequently execute the function call
* encoded in `data`.
*
* Calls {_authorizeUpgrade}.
*
* Emits an {Upgraded} event.
*/
function upgradeToAndCall(address newImplementation, bytes memory data) external payable virtual onlyProxy {
_authorizeUpgrade(newImplementation);
_upgradeToAndCallUUPS(newImplementation, data, true);
}
/**
* @dev Function that should revert when `msg.sender` is not authorized to upgrade the contract. Called by
* {upgradeTo} and {upgradeToAndCall}.
*
* Normally, this function will use an xref:access.adoc[access control] modifier such as {Ownable-onlyOwner}.
*
* ```solidity
* function _authorizeUpgrade(address) internal override onlyOwner {}
* ```
*/
function _authorizeUpgrade(address newImplementation) internal virtual;
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./Constants.sol";
import "./Events.sol";
import "../../libraries/DataTypes.sol";
contract ApeFinanceStorage is Constants, Events {
/// @notice The mapping of the supported markets
mapping(address => DataTypes.Market) public markets;
/// @notice The list of all supported markets
address[] public allMarkets;
/// @notice The mapping of a user's entered markets
mapping(address => mapping(address => bool)) public enteredMarkets;
/// @notice The list of all markets a user has entered
mapping(address => address[]) public allEnteredMarkets;
/// @notice The mapping of a user's allowed extensions
mapping(address => mapping(address => bool)) public allowedExtensions;
/// @notice The list of all allowed extensions for a user
mapping(address => address[]) public allAllowedExtensions;
/// @notice The mapping of the credit limits
mapping(address => mapping(address => uint256)) public creditLimits;
/// @notice The list of a user's credit markets
mapping(address => address[]) public allCreditMarkets;
/// @notice The mapping of the liquidity check status
mapping(address => uint8) public liquidityCheckStatus;
/// @notice The price oracle address
address public priceOracle;
/// @notice The market configurator address
address public marketConfigurator;
/// @notice The credit limit manager address
address public creditLimitManager;
/// @notice The reserve manager address
address public reserveManager;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IArbInfo {
function configureAutomaticYield() external;
function configureVoidYield() external;
function configureDelegateYield(address delegate) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../libraries/DataTypes.sol";
interface IApeFinance {
/* ========== USER INTERFACES ========== */
function accrueInterest(address market) external;
function supply(address from, address to, address market, uint256 amount) external;
function borrow(address from, address to, address asset, uint256 amount) external;
function redeem(address from, address to, address asset, uint256 amount) external returns (uint256);
function repay(address from, address to, address asset, uint256 amount) external returns (uint256);
function liquidate(
address liquidator,
address borrower,
address marketBorrow,
address marketCollateral,
uint256 repayAmount
) external returns (uint256, uint256);
function deferLiquidityCheck(address user, bytes memory data) external;
function getBorrowBalance(address user, address market) external view returns (uint256);
function getATokenBalance(address user, address market) external view returns (uint256);
function getSupplyBalance(address user, address market) external view returns (uint256);
function isMarketListed(address market) external view returns (bool);
function getExchangeRate(address market) external view returns (uint256);
function getTotalSupply(address market) external view returns (uint256);
function getTotalBorrow(address market) external view returns (uint256);
function getTotalCash(address market) external view returns (uint256);
function getTotalReserves(address market) external view returns (uint256);
function getAccountLiquidity(address user) external view returns (uint256, uint256, uint256);
function isAllowedExtension(address user, address extension) external view returns (bool);
function transferAToken(address market, address from, address to, uint256 amount) external;
function setSubAccountExtension(address primary, uint256 subAccountId, bool allowed) external;
/* ========== MARKET CONFIGURATOR INTERFACES ========== */
function getMarketConfiguration(address market) external view returns (DataTypes.MarketConfig memory);
function listMarket(address market, DataTypes.MarketConfig calldata config) external;
function delistMarket(address market) external;
function setMarketConfiguration(address market, DataTypes.MarketConfig calldata config) external;
/* ========== CREDIT LIMIT MANAGER INTERFACES ========== */
function getCreditLimit(address user, address market) external view returns (uint256);
function getUserCreditMarkets(address user) external view returns (address[] memory);
function isCreditAccount(address user) external view returns (bool);
function setCreditLimit(address user, address market, uint256 credit) external;
/* ========== RESERVE MANAGER INTERFACES ========== */
function absorbToReserves(address market) external;
function reduceReserves(address market, uint256 aTokenAmount, address recipient) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IAToken {
function mint(address account, uint256 amount) external;
function burn(address account, uint256 amount) external;
function seize(address from, address to, uint256 amount) external;
function asset() external view returns (address);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IDeferLiquidityCheck {
/**
* @dev The callback function that deferLiquidityCheck will invoke.
* @param data The arbitrary data that was passed in by the caller
*/
function onDeferredLiquidityCheck(bytes memory data) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IInterestRateModel {
function getUtilization(uint256 cash, uint256 borrow) external pure returns (uint256);
function getBorrowRate(uint256 cash, uint256 borrow) external view returns (uint256);
function getSupplyRate(uint256 cash, uint256 borrow) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
interface IPriceOracle {
function getPrice(address asset) external view returns (uint256);
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "openzeppelin-contracts/contracts/token/ERC20/IERC20.sol";
interface IPToken is IERC20 {
function getUnderlying() external view returns (address);
function wrap(uint256 amount) external;
function unwrap(uint256 amount) external;
function absorb(address user) external;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
library Arrays {
/**
* @dev Delete an element from an array.
* @param self The array to delete from
* @param element The element to delete
*/
function deleteElement(address[] storage self, address element) internal {
uint256 count = self.length;
for (uint256 i = 0; i < count;) {
if (self[i] == element) {
if (i != count - 1) {
self[i] = self[count - 1];
}
self.pop();
break;
}
unchecked {
i++;
}
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
library DataTypes {
struct UserBorrow {
uint256 borrowBalance;
uint256 borrowIndex;
}
struct MarketConfig {
// 1 + 1 + 2 + 2 + 2 + 2 + 1 + 1 = 12
bool isListed;
uint8 pauseFlags;
uint16 collateralFactor;
uint16 liquidationThreshold;
uint16 liquidationBonus;
uint16 reserveFactor;
bool isPToken;
bool isDelisted;
// 20 + 20 + 20 + 32 + 32 + 32
address aTokenAddress;
address debtTokenAddress;
address interestRateModelAddress;
uint256 supplyCap;
uint256 borrowCap;
uint256 initialExchangeRate;
}
struct Market {
MarketConfig config;
uint40 lastUpdateTimestamp;
uint256 totalCash;
uint256 totalBorrow;
uint256 totalSupply;
uint256 totalReserves;
uint256 borrowIndex;
mapping(address => UserBorrow) userBorrows;
mapping(address => uint256) userSupplies;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "./DataTypes.sol";
library PauseFlags {
/// @dev Mask for specific actions in the pause flag bit array
uint8 internal constant PAUSE_SUPPLY_MASK = 0xFE;
uint8 internal constant PAUSE_BORROW_MASK = 0xFD;
uint8 internal constant PAUSE_TRANSFER_MASK = 0xFB;
/// @dev Offsets for specific actions in the pause flag bit array
uint8 internal constant PAUSE_SUPPLY_OFFSET = 0;
uint8 internal constant PAUSE_BORROW_OFFSET = 1;
uint8 internal constant PAUSE_TRANSFER_OFFSET = 2;
/// @dev Sets the market supply paused.
function setSupplyPaused(DataTypes.MarketConfig memory self, bool paused) internal pure {
self.pauseFlags = (self.pauseFlags & PAUSE_SUPPLY_MASK) | (toUInt8(paused) << PAUSE_SUPPLY_OFFSET);
}
/// @dev Returns true if the market supply is paused, and false otherwise.
function isSupplyPaused(DataTypes.MarketConfig memory self) internal pure returns (bool) {
return toBool(self.pauseFlags & ~PAUSE_SUPPLY_MASK);
}
/// @dev Sets the market borrow paused.
function setBorrowPaused(DataTypes.MarketConfig memory self, bool paused) internal pure {
self.pauseFlags = (self.pauseFlags & PAUSE_BORROW_MASK) | (toUInt8(paused) << PAUSE_BORROW_OFFSET);
}
/// @dev Returns true if the market borrow is paused, and false otherwise.
function isBorrowPaused(DataTypes.MarketConfig memory self) internal pure returns (bool) {
return toBool(self.pauseFlags & ~PAUSE_BORROW_MASK);
}
/// @dev Sets the market transfer paused.
function setTransferPaused(DataTypes.MarketConfig memory self, bool paused) internal pure {
self.pauseFlags = (self.pauseFlags & PAUSE_TRANSFER_MASK) | (toUInt8(paused) << PAUSE_TRANSFER_OFFSET);
}
/// @dev Returns true if the market transfer is paused, and false otherwise.
function isTransferPaused(DataTypes.MarketConfig memory self) internal pure returns (bool) {
return toBool(self.pauseFlags & ~PAUSE_TRANSFER_MASK);
}
/// @dev Casts a boolean to uint8.
function toUInt8(bool x) internal pure returns (uint8) {
return x ? 1 : 0;
}
/// @dev Casts a uint8 to boolean.
function toBool(uint8 x) internal pure returns (bool) {
return x != 0;
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
library SubAccounts {
function getSubAccount(address primary, uint256 subAccountId) internal pure returns (address) {
require(subAccountId < 256, "invalid sub account id");
return address(uint160(primary) ^ uint160(subAccountId));
}
function isSubAccountOf(address subAccount, address primary) internal pure returns (bool) {
return (uint160(primary) | 0xFF) == (uint160(subAccount) | 0xFF);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)
pragma solidity ^0.8.0;
import "../utils/ContextUpgradeable.sol";
import "../proxy/utils/Initializable.sol";
/**
* @dev Contract module which provides a basic access control mechanism, where
* there is an account (an owner) that can be granted exclusive access to
* specific functions.
*
* By default, the owner account will be the one that deploys the contract. This
* can later be changed with {transferOwnership}.
*
* This module is used through inheritance. It will make available the modifier
* `onlyOwner`, which can be applied to your functions to restrict their use to
* the owner.
*/
abstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {
address private _owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev Initializes the contract setting the deployer as the initial owner.
*/
function __Ownable_init() internal onlyInitializing {
__Ownable_init_unchained();
}
function __Ownable_init_unchained() internal onlyInitializing {
_transferOwnership(_msgSender());
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
_checkOwner();
_;
}
/**
* @dev Returns the address of the current owner.
*/
function owner() public view virtual returns (address) {
return _owner;
}
/**
* @dev Throws if the sender is not the owner.
*/
function _checkOwner() internal view virtual {
require(owner() == _msgSender(), "Ownable: caller is not the owner");
}
/**
* @dev Leaves the contract without owner. It will not be possible to call
* `onlyOwner` functions anymore. Can only be called by the current owner.
*
* NOTE: Renouncing ownership will leave the contract without an owner,
* thereby removing any functionality that is only available to the owner.
*/
function renounceOwnership() public virtual onlyOwner {
_transferOwnership(address(0));
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Can only be called by the current owner.
*/
function transferOwnership(address newOwner) public virtual onlyOwner {
require(newOwner != address(0), "Ownable: new owner is the zero address");
_transferOwnership(newOwner);
}
/**
* @dev Transfers ownership of the contract to a new account (`newOwner`).
* Internal function without access restriction.
*/
function _transferOwnership(address newOwner) internal virtual {
address oldOwner = _owner;
_owner = newOwner;
emit OwnershipTransferred(oldOwner, newOwner);
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[49] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)
pragma solidity ^0.8.1;
/**
* @dev Collection of functions related to the address type
*/
library AddressUpgradeable {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value
) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (interfaces/draft-IERC1822.sol)
pragma solidity ^0.8.0;
/**
* @dev ERC1822: Universal Upgradeable Proxy Standard (UUPS) documents a method for upgradeability through a simplified
* proxy whose upgrades are fully controlled by the current implementation.
*/
interface IERC1822ProxiableUpgradeable {
/**
* @dev Returns the storage slot that the proxiable contract assumes is being used to store the implementation
* address.
*
* IMPORTANT: A proxy pointing at a proxiable contract should not be considered proxiable itself, because this risks
* bricking a proxy that upgrades to it, by delegating to itself until out of gas. Thus it is critical that this
* function revert if invoked through a proxy.
*/
function proxiableUUID() external view returns (bytes32);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (proxy/ERC1967/ERC1967Upgrade.sol)
pragma solidity ^0.8.2;
import "../beacon/IBeaconUpgradeable.sol";
import "../../interfaces/draft-IERC1822Upgradeable.sol";
import "../../utils/AddressUpgradeable.sol";
import "../../utils/StorageSlotUpgradeable.sol";
import "../utils/Initializable.sol";
/**
* @dev This abstract contract provides getters and event emitting update functions for
* https://eips.ethereum.org/EIPS/eip-1967[EIP1967] slots.
*
* _Available since v4.1._
*
* @custom:oz-upgrades-unsafe-allow delegatecall
*/
abstract contract ERC1967UpgradeUpgradeable is Initializable {
function __ERC1967Upgrade_init() internal onlyInitializing {
}
function __ERC1967Upgrade_init_unchained() internal onlyInitializing {
}
// This is the keccak-256 hash of "eip1967.proxy.rollback" subtracted by 1
bytes32 private constant _ROLLBACK_SLOT = 0x4910fdfa16fed3260ed0e7147f7cc6da11a60208b5b9406d12a635614ffd9143;
/**
* @dev Storage slot with the address of the current implementation.
* This is the keccak-256 hash of "eip1967.proxy.implementation" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
/**
* @dev Emitted when the implementation is upgraded.
*/
event Upgraded(address indexed implementation);
/**
* @dev Returns the current implementation address.
*/
function _getImplementation() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value;
}
/**
* @dev Stores a new address in the EIP1967 implementation slot.
*/
function _setImplementation(address newImplementation) private {
require(AddressUpgradeable.isContract(newImplementation), "ERC1967: new implementation is not a contract");
StorageSlotUpgradeable.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
}
/**
* @dev Perform implementation upgrade
*
* Emits an {Upgraded} event.
*/
function _upgradeTo(address newImplementation) internal {
_setImplementation(newImplementation);
emit Upgraded(newImplementation);
}
/**
* @dev Perform implementation upgrade with additional setup call.
*
* Emits an {Upgraded} event.
*/
function _upgradeToAndCall(
address newImplementation,
bytes memory data,
bool forceCall
) internal {
_upgradeTo(newImplementation);
if (data.length > 0 || forceCall) {
_functionDelegateCall(newImplementation, data);
}
}
/**
* @dev Perform implementation upgrade with security checks for UUPS proxies, and additional setup call.
*
* Emits an {Upgraded} event.
*/
function _upgradeToAndCallUUPS(
address newImplementation,
bytes memory data,
bool forceCall
) internal {
// Upgrades from old implementations will perform a rollback test. This test requires the new
// implementation to upgrade back to the old, non-ERC1822 compliant, implementation. Removing
// this special case will break upgrade paths from old UUPS implementation to new ones.
if (StorageSlotUpgradeable.getBooleanSlot(_ROLLBACK_SLOT).value) {
_setImplementation(newImplementation);
} else {
try IERC1822ProxiableUpgradeable(newImplementation).proxiableUUID() returns (bytes32 slot) {
require(slot == _IMPLEMENTATION_SLOT, "ERC1967Upgrade: unsupported proxiableUUID");
} catch {
revert("ERC1967Upgrade: new implementation is not UUPS");
}
_upgradeToAndCall(newImplementation, data, forceCall);
}
}
/**
* @dev Storage slot with the admin of the contract.
* This is the keccak-256 hash of "eip1967.proxy.admin" subtracted by 1, and is
* validated in the constructor.
*/
bytes32 internal constant _ADMIN_SLOT = 0xb53127684a568b3173ae13b9f8a6016e243e63b6e8ee1178d6a717850b5d6103;
/**
* @dev Emitted when the admin account has changed.
*/
event AdminChanged(address previousAdmin, address newAdmin);
/**
* @dev Returns the current admin.
*/
function _getAdmin() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value;
}
/**
* @dev Stores a new address in the EIP1967 admin slot.
*/
function _setAdmin(address newAdmin) private {
require(newAdmin != address(0), "ERC1967: new admin is the zero address");
StorageSlotUpgradeable.getAddressSlot(_ADMIN_SLOT).value = newAdmin;
}
/**
* @dev Changes the admin of the proxy.
*
* Emits an {AdminChanged} event.
*/
function _changeAdmin(address newAdmin) internal {
emit AdminChanged(_getAdmin(), newAdmin);
_setAdmin(newAdmin);
}
/**
* @dev The storage slot of the UpgradeableBeacon contract which defines the implementation for this proxy.
* This is bytes32(uint256(keccak256('eip1967.proxy.beacon')) - 1)) and is validated in the constructor.
*/
bytes32 internal constant _BEACON_SLOT = 0xa3f0ad74e5423aebfd80d3ef4346578335a9a72aeaee59ff6cb3582b35133d50;
/**
* @dev Emitted when the beacon is upgraded.
*/
event BeaconUpgraded(address indexed beacon);
/**
* @dev Returns the current beacon.
*/
function _getBeacon() internal view returns (address) {
return StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value;
}
/**
* @dev Stores a new beacon in the EIP1967 beacon slot.
*/
function _setBeacon(address newBeacon) private {
require(AddressUpgradeable.isContract(newBeacon), "ERC1967: new beacon is not a contract");
require(
AddressUpgradeable.isContract(IBeaconUpgradeable(newBeacon).implementation()),
"ERC1967: beacon implementation is not a contract"
);
StorageSlotUpgradeable.getAddressSlot(_BEACON_SLOT).value = newBeacon;
}
/**
* @dev Perform beacon upgrade with additional setup call. Note: This upgrades the address of the beacon, it does
* not upgrade the implementation contained in the beacon (see {UpgradeableBeacon-_setImplementation} for that).
*
* Emits a {BeaconUpgraded} event.
*/
function _upgradeBeaconToAndCall(
address newBeacon,
bytes memory data,
bool forceCall
) internal {
_setBeacon(newBeacon);
emit BeaconUpgraded(newBeacon);
if (data.length > 0 || forceCall) {
_functionDelegateCall(IBeaconUpgradeable(newBeacon).implementation(), data);
}
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function _functionDelegateCall(address target, bytes memory data) private returns (bytes memory) {
require(AddressUpgradeable.isContract(target), "Address: delegate call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = target.delegatecall(data);
return AddressUpgradeable.verifyCallResult(success, returndata, "Address: low-level delegate call failed");
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
abstract contract Constants {
uint256 internal constant INITIAL_BORROW_INDEX = 1e18;
uint256 internal constant INITIAL_EXCHANGE_RATE = 1e18;
uint256 internal constant FACTOR_SCALE = 10000;
uint16 internal constant MAX_COLLATERAL_FACTOR = 9000; // 90%
uint16 internal constant MAX_LIQUIDATION_THRESHOLD = 10000; // 100%
uint16 internal constant MIN_LIQUIDATION_BONUS = 10000; // 100%
uint16 internal constant MAX_LIQUIDATION_BONUS = 12500; // 125%
uint16 internal constant MAX_LIQUIDATION_THRESHOLD_X_BONUS = 10000; // 100%
uint16 internal constant MAX_RESERVE_FACTOR = 10000; // 100%
uint8 internal constant LIQUIDITY_CHECK_NORMAL = 0;
uint8 internal constant LIQUIDITY_CHECK_DEFERRED = 1;
uint8 internal constant LIQUIDITY_CHECK_DIRTY = 2;
address internal constant ARB_INFO_CONTRACT = 0x0000000000000000000000000000000000000065;
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;
import "../../libraries/DataTypes.sol";
abstract contract Events {
event MarketConfiguratorSet(address configurator);
event CreditLimitManagerSet(address manager);
event ReserveManagerSet(address manager);
event CreditLimitChanged(address indexed user, address indexed market, uint256 credit);
event PriceOracleSet(address priceOracle);
event MarketListed(address indexed market, uint40 timestamp, DataTypes.MarketConfig config);
event MarketDelisted(address indexed market);
event MarketConfigurationChanged(address indexed market, DataTypes.MarketConfig config);
event MarketEntered(address indexed market, address indexed user);
event MarketExited(address indexed market, address indexed user);
event InterestAccrued(
address indexed market,
uint40 timestamp,
uint256 borrowRatePerSecond,
uint256 borrowIndex,
uint256 totalBorrow,
uint256 totalReserves
);
event Supply(
address indexed market, address indexed from, address indexed to, uint256 amount, uint256 aTokenAmount
);
event Borrow(
address indexed market,
address indexed from,
address indexed to,
uint256 amount,
uint256 accountBorrow,
uint256 totalBorrow
);
event Redeem(
address indexed market, address indexed from, address indexed to, uint256 amount, uint256 aTokenAmount
);
event Repay(
address indexed market,
address indexed from,
address indexed to,
uint256 amount,
uint256 accountBorrow,
uint256 totalBorrow
);
event Liquidate(
address indexed liquidator,
address indexed borrower,
address indexed marketBorrow,
address marketCollateral,
uint256 repayAmount,
uint256 seizedAmount
);
event TransferAToken(address indexed market, address indexed from, address indexed to, uint256 aTokenAmount);
event TokenSeized(address indexed token, address indexed recipient, uint256 amount);
event ReservesIncreased(address indexed market, uint256 aTokenAmount, uint256 amount);
event ReservesDecreased(address indexed market, address indexed recipient, uint256 aTokenAmount, uint256 amount);
event ExtensionAdded(address indexed account, address indexed extension);
event ExtensionRemoved(address indexed account, address indexed extension);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
import "../proxy/utils/Initializable.sol";
/**
* @dev Provides information about the current execution context, including the
* sender of the transaction and its data. While these are generally available
* via msg.sender and msg.data, they should not be accessed in such a direct
* manner, since when dealing with meta-transactions the account sending and
* paying for execution may not be the actual sender (as far as an application
* is concerned).
*
* This contract is only required for intermediate, library-like contracts.
*/
abstract contract ContextUpgradeable is Initializable {
function __Context_init() internal onlyInitializing {
}
function __Context_init_unchained() internal onlyInitializing {
}
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
/**
* @dev This empty reserved space is put in place to allow future versions to add new
* variables without shifting down storage in the inheritance chain.
* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
*/
uint256[50] private __gap;
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (proxy/beacon/IBeacon.sol)
pragma solidity ^0.8.0;
/**
* @dev This is the interface that {BeaconProxy} expects of its beacon.
*/
interface IBeaconUpgradeable {
/**
* @dev Must return an address that can be used as a delegate call target.
*
* {BeaconProxy} will check that this address is a contract.
*/
function implementation() external view returns (address);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.7.0) (utils/StorageSlot.sol)
pragma solidity ^0.8.0;
/**
* @dev Library for reading and writing primitive types to specific storage slots.
*
* Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
* This library helps with reading and writing to such slots without the need for inline assembly.
*
* The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
*
* Example usage to set ERC1967 implementation slot:
* ```
* contract ERC1967 {
* bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
*
* function _getImplementation() internal view returns (address) {
* return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
* }
*
* function _setImplementation(address newImplementation) internal {
* require(Address.isContract(newImplementation), "ERC1967: new implementation is not a contract");
* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
* }
* }
* ```
*
* _Available since v4.1 for `address`, `bool`, `bytes32`, and `uint256`._
*/
library StorageSlotUpgradeable {
struct AddressSlot {
address value;
}
struct BooleanSlot {
bool value;
}
struct Bytes32Slot {
bytes32 value;
}
struct Uint256Slot {
uint256 value;
}
/**
* @dev Returns an `AddressSlot` with member `value` located at `slot`.
*/
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BooleanSlot` with member `value` located at `slot`.
*/
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
*/
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Uint256Slot` with member `value` located at `slot`.
*/
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
}