mirror of
https://github.com/Instadapp/aave-protocol-v2.git
synced 2024-07-29 21:47:30 +00:00
811 lines
27 KiB
Solidity
811 lines
27 KiB
Solidity
// SPDX-License-Identifier: agpl-3.0
|
|
pragma solidity ^0.6.8;
|
|
pragma experimental ABIEncoderV2;
|
|
|
|
import {SafeMath} from '@openzeppelin/contracts/math/SafeMath.sol';
|
|
import {ReentrancyGuard} from '@openzeppelin/contracts/utils/ReentrancyGuard.sol';
|
|
import {IERC20} from '@openzeppelin/contracts/token/ERC20/IERC20.sol';
|
|
import {
|
|
VersionedInitializable
|
|
} from '../libraries/openzeppelin-upgradeability/VersionedInitializable.sol';
|
|
import {ILendingPoolAddressesProvider} from '../interfaces/ILendingPoolAddressesProvider.sol';
|
|
import {IAToken} from '../tokenization/interfaces/IAToken.sol';
|
|
import {Helpers} from '../libraries/helpers/Helpers.sol';
|
|
import {WadRayMath} from '../libraries/math/WadRayMath.sol';
|
|
import {ReserveLogic} from '../libraries/logic/ReserveLogic.sol';
|
|
import {GenericLogic} from '../libraries/logic/GenericLogic.sol';
|
|
import {ValidationLogic} from '../libraries/logic/ValidationLogic.sol';
|
|
import {ReserveConfiguration} from '../libraries/configuration/ReserveConfiguration.sol';
|
|
import {UserConfiguration} from '../libraries/configuration/UserConfiguration.sol';
|
|
import {IStableDebtToken} from '../tokenization/interfaces/IStableDebtToken.sol';
|
|
import {IVariableDebtToken} from '../tokenization/interfaces/IVariableDebtToken.sol';
|
|
import {IFlashLoanReceiver} from '../flashloan/interfaces/IFlashLoanReceiver.sol';
|
|
import {LendingPoolLiquidationManager} from './LendingPoolLiquidationManager.sol';
|
|
import {IPriceOracleGetter} from '../interfaces/IPriceOracleGetter.sol';
|
|
import {SafeERC20} from '@openzeppelin/contracts/token/ERC20/SafeERC20.sol';
|
|
import {ILendingPool} from '../interfaces/ILendingPool.sol';
|
|
|
|
/**
|
|
* @title LendingPool contract
|
|
* @notice Implements the actions of the LendingPool, and exposes accessory methods to fetch the users and reserve data
|
|
* @author Aave
|
|
**/
|
|
|
|
contract LendingPool is ReentrancyGuard, VersionedInitializable, ILendingPool {
|
|
using SafeMath for uint256;
|
|
using WadRayMath for uint256;
|
|
using ReserveLogic for ReserveLogic.ReserveData;
|
|
using ReserveConfiguration for ReserveConfiguration.Map;
|
|
using UserConfiguration for UserConfiguration.Map;
|
|
using SafeERC20 for IERC20;
|
|
|
|
//main configuration parameters
|
|
uint256 public constant REBALANCE_DOWN_RATE_DELTA = (1e27) / 5;
|
|
uint256 public constant MAX_STABLE_RATE_BORROW_SIZE_PERCENT = 25;
|
|
uint256 public constant FLASHLOAN_FEE_TOTAL = 9;
|
|
|
|
//require error messages
|
|
string private constant NOT_ENOUGH_STABLE_BORROW_BALANCE = '1'; // 'User does not have any stable rate loan for this reserve'
|
|
string private constant INTERESTRATE_REBALANCE_CONDITIONS_NOT_MET = '2'; // 'Interest rate rebalance conditions were not met'
|
|
string private constant LIQUIDATION_CALL_FAILED = '3'; // 'Liquidation call failed'
|
|
string private constant NOT_ENOUGH_LIQUIDITY_TO_BORROW = '4'; // 'There is not enough liquidity available to borrow'
|
|
string private constant REQUESTED_AMOUNT_TO_SMALL = '5'; // 'The requested amount is too small for a FlashLoan.'
|
|
string private constant INCONSISTENT_PROTOCOL_ACTUAL_BALANCE = '6'; // 'The actual balance of the protocol is inconsistent'
|
|
|
|
ILendingPoolAddressesProvider internal _addressesProvider;
|
|
|
|
mapping(address => ReserveLogic.ReserveData) internal _reserves;
|
|
mapping(address => UserConfiguration.Map) internal _usersConfig;
|
|
|
|
address[] internal _reservesList;
|
|
|
|
/**
|
|
* @dev only lending pools configurator can use functions affected by this modifier
|
|
**/
|
|
modifier onlyLendingPoolConfigurator {
|
|
require(_addressesProvider.getLendingPoolConfigurator() == msg.sender, '30');
|
|
_;
|
|
}
|
|
|
|
uint256 public constant UINT_MAX_VALUE = uint256(-1);
|
|
|
|
uint256 public constant LENDINGPOOL_REVISION = 0x2;
|
|
|
|
function getRevision() internal override pure returns (uint256) {
|
|
return LENDINGPOOL_REVISION;
|
|
}
|
|
|
|
/**
|
|
* @dev this function is invoked by the proxy contract when the LendingPool contract is added to the
|
|
* AddressesProvider.
|
|
* @param provider the address of the LendingPoolAddressesProvider registry
|
|
**/
|
|
function initialize(ILendingPoolAddressesProvider provider) public initializer {
|
|
_addressesProvider = provider;
|
|
}
|
|
|
|
/**
|
|
* @dev deposits The underlying asset into the reserve. A corresponding amount of the overlying asset (aTokens)
|
|
* is minted.
|
|
* @param asset the address of the reserve
|
|
* @param amount the amount to be deposited
|
|
* @param referralCode integrators are assigned a referral code and can potentially receive rewards.
|
|
**/
|
|
function deposit(
|
|
address asset,
|
|
uint256 amount,
|
|
uint16 referralCode
|
|
) external override nonReentrant {
|
|
ReserveLogic.ReserveData storage reserve = _reserves[asset];
|
|
|
|
ValidationLogic.validateDeposit(reserve, amount);
|
|
|
|
address aToken = reserve.aTokenAddress;
|
|
|
|
reserve.updateCumulativeIndexesAndTimestamp();
|
|
reserve.updateInterestRates(asset, aToken, amount, 0);
|
|
|
|
bool isFirstDeposit = IAToken(aToken).balanceOf(msg.sender) == 0;
|
|
if (isFirstDeposit) {
|
|
_usersConfig[msg.sender].setUsingAsCollateral(reserve.index, true);
|
|
}
|
|
|
|
//minting AToken to user 1:1 with the specific exchange rate
|
|
IAToken(aToken).mint(msg.sender, amount);
|
|
|
|
//transfer to the aToken contract
|
|
IERC20(asset).safeTransferFrom(msg.sender, aToken, amount);
|
|
|
|
//solium-disable-next-line
|
|
emit Deposit(asset, msg.sender, amount, referralCode);
|
|
}
|
|
|
|
/**
|
|
* @dev withdraws the _reserves of user.
|
|
* @param asset the address of the reserve
|
|
* @param amount the underlying amount to be redeemed
|
|
**/
|
|
function withdraw(address asset, uint256 amount) external override nonReentrant {
|
|
ReserveLogic.ReserveData storage reserve = _reserves[asset];
|
|
|
|
address aToken = reserve.aTokenAddress;
|
|
|
|
uint256 userBalance = IAToken(aToken).balanceOf(msg.sender);
|
|
|
|
uint256 amountToWithdraw = amount;
|
|
|
|
//if amount is equal to uint(-1), the user wants to redeem everything
|
|
if (amount == UINT_MAX_VALUE) {
|
|
amountToWithdraw = userBalance;
|
|
}
|
|
|
|
ValidationLogic.validateWithdraw(
|
|
asset,
|
|
aToken,
|
|
amountToWithdraw,
|
|
userBalance,
|
|
_reserves,
|
|
_usersConfig[msg.sender],
|
|
_reservesList,
|
|
_addressesProvider.getPriceOracle()
|
|
);
|
|
|
|
reserve.updateCumulativeIndexesAndTimestamp();
|
|
|
|
reserve.updateInterestRates(asset, aToken, 0, amountToWithdraw);
|
|
|
|
if (amountToWithdraw == userBalance) {
|
|
_usersConfig[msg.sender].setUsingAsCollateral(reserve.index, false);
|
|
}
|
|
|
|
IAToken(aToken).burn(msg.sender, msg.sender, amountToWithdraw);
|
|
|
|
//solium-disable-next-line
|
|
emit Withdraw(asset, msg.sender, amount);
|
|
}
|
|
|
|
/**
|
|
* @dev Allows users to borrow a specific amount of the reserve currency, provided that the borrower
|
|
* already deposited enough collateral.
|
|
* @param asset the address of the reserve
|
|
* @param amount the amount to be borrowed
|
|
* @param interestRateMode the interest rate mode at which the user wants to borrow. Can be 0 (STABLE) or 1 (VARIABLE)
|
|
**/
|
|
function borrow(
|
|
address asset,
|
|
uint256 amount,
|
|
uint256 interestRateMode,
|
|
uint16 referralCode
|
|
) external override nonReentrant {
|
|
ReserveLogic.ReserveData storage reserve = _reserves[asset];
|
|
UserConfiguration.Map storage userConfig = _usersConfig[msg.sender];
|
|
|
|
uint256 amountInETH = IPriceOracleGetter(_addressesProvider.getPriceOracle())
|
|
.getAssetPrice(asset)
|
|
.mul(amount)
|
|
.div(10**reserve.configuration.getDecimals()); //price is in ether
|
|
|
|
ValidationLogic.validateBorrow(
|
|
reserve,
|
|
asset,
|
|
amount,
|
|
amountInETH,
|
|
interestRateMode,
|
|
MAX_STABLE_RATE_BORROW_SIZE_PERCENT,
|
|
_reserves,
|
|
_usersConfig[msg.sender],
|
|
_reservesList,
|
|
_addressesProvider.getPriceOracle()
|
|
);
|
|
|
|
//caching the current stable borrow rate
|
|
uint256 userStableRate = reserve.currentStableBorrowRate;
|
|
|
|
reserve.updateCumulativeIndexesAndTimestamp();
|
|
|
|
if (ReserveLogic.InterestRateMode(interestRateMode) == ReserveLogic.InterestRateMode.STABLE) {
|
|
IStableDebtToken(reserve.stableDebtTokenAddress).mint(msg.sender, amount, userStableRate);
|
|
} else {
|
|
IVariableDebtToken(reserve.variableDebtTokenAddress).mint(msg.sender, amount);
|
|
}
|
|
|
|
address aToken = reserve.aTokenAddress;
|
|
reserve.updateInterestRates(asset, aToken, 0, amount);
|
|
|
|
uint256 reserveIndex = reserve.index;
|
|
if (!userConfig.isBorrowing(reserveIndex)) {
|
|
userConfig.setBorrowing(reserveIndex, true);
|
|
}
|
|
|
|
//if we reached this point, we can transfer
|
|
IAToken(aToken).transferUnderlyingTo(msg.sender, amount);
|
|
|
|
emit Borrow(
|
|
asset,
|
|
msg.sender,
|
|
amount,
|
|
interestRateMode,
|
|
ReserveLogic.InterestRateMode(interestRateMode) == ReserveLogic.InterestRateMode.STABLE
|
|
? userStableRate
|
|
: reserve.currentVariableBorrowRate,
|
|
referralCode
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @notice repays a borrow on the specific reserve, for the specified amount (or for the whole amount, if uint256(-1) is specified).
|
|
* @dev the target user is defined by onBehalfOf. If there is no repayment on behalf of another account,
|
|
* onBehalfOf must be equal to msg.sender.
|
|
* @param asset the address of the reserve on which the user borrowed
|
|
* @param amount the amount to repay, or uint256(-1) if the user wants to repay everything
|
|
* @param onBehalfOf the address for which msg.sender is repaying.
|
|
**/
|
|
function repay(
|
|
address asset,
|
|
uint256 amount,
|
|
uint256 rateMode,
|
|
address onBehalfOf
|
|
) external override nonReentrant {
|
|
ReserveLogic.ReserveData storage reserve = _reserves[asset];
|
|
|
|
(uint256 stableDebt, uint256 variableDebt) = Helpers.getUserCurrentDebt(onBehalfOf, reserve);
|
|
|
|
ReserveLogic.InterestRateMode interestRateMode = ReserveLogic.InterestRateMode(rateMode);
|
|
|
|
//default to max amount
|
|
uint256 paybackAmount = interestRateMode == ReserveLogic.InterestRateMode.STABLE
|
|
? stableDebt
|
|
: variableDebt;
|
|
|
|
if (amount != UINT_MAX_VALUE && amount < paybackAmount) {
|
|
paybackAmount = amount;
|
|
}
|
|
|
|
ValidationLogic.validateRepay(
|
|
reserve,
|
|
amount,
|
|
interestRateMode,
|
|
onBehalfOf,
|
|
stableDebt,
|
|
variableDebt
|
|
);
|
|
|
|
reserve.updateCumulativeIndexesAndTimestamp();
|
|
|
|
//burns an equivalent amount of debt tokens
|
|
if (interestRateMode == ReserveLogic.InterestRateMode.STABLE) {
|
|
IStableDebtToken(reserve.stableDebtTokenAddress).burn(onBehalfOf, paybackAmount);
|
|
} else {
|
|
IVariableDebtToken(reserve.variableDebtTokenAddress).burn(onBehalfOf, paybackAmount);
|
|
}
|
|
|
|
address aToken = reserve.aTokenAddress;
|
|
reserve.updateInterestRates(asset, aToken, paybackAmount, 0);
|
|
|
|
if (stableDebt.add(variableDebt).sub(paybackAmount) == 0) {
|
|
_usersConfig[onBehalfOf].setBorrowing(reserve.index, false);
|
|
}
|
|
|
|
IERC20(asset).safeTransferFrom(msg.sender, aToken, paybackAmount);
|
|
|
|
emit Repay(asset, onBehalfOf, msg.sender, paybackAmount);
|
|
}
|
|
|
|
/**
|
|
* @dev borrowers can user this function to swap between stable and variable borrow rate modes.
|
|
* @param asset the address of the reserve on which the user borrowed
|
|
* @param rateMode the rate mode that the user wants to swap
|
|
**/
|
|
function swapBorrowRateMode(address asset, uint256 rateMode) external override nonReentrant {
|
|
ReserveLogic.ReserveData storage reserve = _reserves[asset];
|
|
|
|
(uint256 stableDebt, uint256 variableDebt) = Helpers.getUserCurrentDebt(msg.sender, reserve);
|
|
|
|
ReserveLogic.InterestRateMode interestRateMode = ReserveLogic.InterestRateMode(rateMode);
|
|
|
|
ValidationLogic.validateSwapRateMode(
|
|
reserve,
|
|
_usersConfig[msg.sender],
|
|
stableDebt,
|
|
variableDebt,
|
|
interestRateMode
|
|
);
|
|
|
|
reserve.updateCumulativeIndexesAndTimestamp();
|
|
|
|
if (interestRateMode == ReserveLogic.InterestRateMode.STABLE) {
|
|
//burn stable rate tokens, mint variable rate tokens
|
|
IStableDebtToken(reserve.stableDebtTokenAddress).burn(msg.sender, stableDebt);
|
|
IVariableDebtToken(reserve.variableDebtTokenAddress).mint(msg.sender, stableDebt);
|
|
} else {
|
|
//do the opposite
|
|
IVariableDebtToken(reserve.variableDebtTokenAddress).burn(msg.sender, variableDebt);
|
|
IStableDebtToken(reserve.stableDebtTokenAddress).mint(
|
|
msg.sender,
|
|
variableDebt,
|
|
reserve.currentStableBorrowRate
|
|
);
|
|
}
|
|
|
|
reserve.updateInterestRates(asset, reserve.aTokenAddress, 0, 0);
|
|
|
|
emit Swap(
|
|
asset,
|
|
msg.sender,
|
|
//solium-disable-next-line
|
|
block.timestamp
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @dev rebalances the stable interest rate of a user if current liquidity rate > user stable rate.
|
|
* this is regulated by Aave to ensure that the protocol is not abused, and the user is paying a fair
|
|
* rate. Anyone can call this function.
|
|
* @param asset the address of the reserve
|
|
* @param user the address of the user to be rebalanced
|
|
**/
|
|
function rebalanceStableBorrowRate(address asset, address user) external override nonReentrant {
|
|
ReserveLogic.ReserveData storage reserve = _reserves[asset];
|
|
|
|
IStableDebtToken stableDebtToken = IStableDebtToken(reserve.stableDebtTokenAddress);
|
|
|
|
uint256 stableBorrowBalance = IERC20(address(stableDebtToken)).balanceOf(user);
|
|
|
|
// user must be borrowing on asset at a stable rate
|
|
require(stableBorrowBalance > 0, NOT_ENOUGH_STABLE_BORROW_BALANCE);
|
|
|
|
uint256 rebalanceDownRateThreshold = reserve.currentStableBorrowRate.rayMul(
|
|
WadRayMath.ray().add(REBALANCE_DOWN_RATE_DELTA)
|
|
);
|
|
|
|
//1. user stable borrow rate is below the current liquidity rate. The loan needs to be rebalanced,
|
|
//as this situation can be abused (user putting back the borrowed liquidity in the same reserve to earn on it)
|
|
//2. user stable rate is above the market avg borrow rate of a certain delta, and utilization rate is low.
|
|
//In this case, the user is paying an interest that is too high, and needs to be rescaled down.
|
|
|
|
uint256 userStableRate = stableDebtToken.getUserStableRate(user);
|
|
|
|
require(
|
|
userStableRate < reserve.currentLiquidityRate || userStableRate > rebalanceDownRateThreshold,
|
|
INTERESTRATE_REBALANCE_CONDITIONS_NOT_MET
|
|
);
|
|
|
|
//burn old debt tokens, mint new ones
|
|
|
|
reserve.updateCumulativeIndexesAndTimestamp();
|
|
|
|
stableDebtToken.burn(user, stableBorrowBalance);
|
|
stableDebtToken.mint(user, stableBorrowBalance, reserve.currentStableBorrowRate);
|
|
|
|
reserve.updateInterestRates(asset, reserve.aTokenAddress, 0, 0);
|
|
|
|
emit RebalanceStableBorrowRate(asset, user);
|
|
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* @dev allows depositors to enable or disable a specific deposit as collateral.
|
|
* @param asset the address of the reserve
|
|
* @param useAsCollateral true if the user wants to user the deposit as collateral, false otherwise.
|
|
**/
|
|
function setUserUseReserveAsCollateral(address asset, bool useAsCollateral)
|
|
external
|
|
override
|
|
nonReentrant
|
|
{
|
|
ReserveLogic.ReserveData storage reserve = _reserves[asset];
|
|
|
|
ValidationLogic.validateSetUseReserveAsCollateral(
|
|
reserve,
|
|
asset,
|
|
_reserves,
|
|
_usersConfig[msg.sender],
|
|
_reservesList,
|
|
_addressesProvider.getPriceOracle()
|
|
);
|
|
|
|
_usersConfig[msg.sender].setUsingAsCollateral(reserve.index, useAsCollateral);
|
|
|
|
if (useAsCollateral) {
|
|
emit ReserveUsedAsCollateralEnabled(asset, msg.sender);
|
|
} else {
|
|
emit ReserveUsedAsCollateralDisabled(asset, msg.sender);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @dev users can invoke this function to liquidate an undercollateralized position.
|
|
* @param asset the address of the collateral to liquidated
|
|
* @param asset the address of the principal reserve
|
|
* @param user the address of the borrower
|
|
* @param purchaseAmount the amount of principal that the liquidator wants to repay
|
|
* @param receiveAToken true if the liquidators wants to receive the aTokens, false if
|
|
* he wants to receive the underlying asset directly
|
|
**/
|
|
function liquidationCall(
|
|
address collateral,
|
|
address asset,
|
|
address user,
|
|
uint256 purchaseAmount,
|
|
bool receiveAToken
|
|
) external override nonReentrant {
|
|
address liquidationManager = _addressesProvider.getLendingPoolLiquidationManager();
|
|
|
|
//solium-disable-next-line
|
|
(bool success, bytes memory result) = liquidationManager.delegatecall(
|
|
abi.encodeWithSignature(
|
|
'liquidationCall(address,address,address,uint256,bool)',
|
|
collateral,
|
|
asset,
|
|
user,
|
|
purchaseAmount,
|
|
receiveAToken
|
|
)
|
|
);
|
|
require(success, LIQUIDATION_CALL_FAILED);
|
|
|
|
(uint256 returnCode, string memory returnMessage) = abi.decode(result, (uint256, string));
|
|
|
|
if (returnCode != 0) {
|
|
//error found
|
|
revert(string(abi.encodePacked(returnMessage)));
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @dev allows smartcontracts to access the liquidity of the pool within one transaction,
|
|
* as long as the amount taken plus a fee is returned. NOTE There are security concerns for developers of flashloan receiver contracts
|
|
* that must be kept into consideration. For further details please visit https://developers.aave.com
|
|
* @param receiverAddress The address of the contract receiving the funds. The receiver should implement the IFlashLoanReceiver interface.
|
|
* @param asset the address of the principal reserve
|
|
* @param amount the amount requested for this flashloan
|
|
**/
|
|
function flashLoan(
|
|
address receiverAddress,
|
|
address asset,
|
|
uint256 amount,
|
|
bytes calldata params
|
|
) external override nonReentrant {
|
|
ReserveLogic.ReserveData storage reserve = _reserves[asset];
|
|
|
|
address aTokenAddress = reserve.aTokenAddress;
|
|
|
|
//check that the reserve has enough available liquidity
|
|
uint256 availableLiquidityBefore = IERC20(asset).balanceOf(aTokenAddress);
|
|
|
|
//calculate amount fee
|
|
uint256 amountFee = amount.mul(FLASHLOAN_FEE_TOTAL).div(10000);
|
|
|
|
require(availableLiquidityBefore >= amount, NOT_ENOUGH_LIQUIDITY_TO_BORROW);
|
|
require(amountFee > 0, REQUESTED_AMOUNT_TO_SMALL);
|
|
|
|
//get the FlashLoanReceiver instance
|
|
IFlashLoanReceiver receiver = IFlashLoanReceiver(receiverAddress);
|
|
|
|
//transfer funds to the receiver
|
|
IAToken(aTokenAddress).transferUnderlyingTo(receiverAddress, amount);
|
|
|
|
//execute action of the receiver
|
|
receiver.executeOperation(asset, aTokenAddress, amount, amountFee, params);
|
|
|
|
//check that the actual balance of the core contract includes the returned amount
|
|
uint256 availableLiquidityAfter = IERC20(asset).balanceOf(aTokenAddress);
|
|
|
|
require(
|
|
availableLiquidityAfter == availableLiquidityBefore.add(amountFee),
|
|
INCONSISTENT_PROTOCOL_ACTUAL_BALANCE
|
|
);
|
|
|
|
//compounding the cumulated interest
|
|
reserve.updateCumulativeIndexesAndTimestamp();
|
|
|
|
uint256 totalLiquidityBefore = availableLiquidityBefore
|
|
.add(IERC20(reserve.variableDebtTokenAddress).totalSupply())
|
|
.add(IERC20(reserve.stableDebtTokenAddress).totalSupply());
|
|
|
|
//compounding the received fee into the reserve
|
|
reserve.cumulateToLiquidityIndex(totalLiquidityBefore, amountFee);
|
|
|
|
//refresh interest rates
|
|
reserve.updateInterestRates(asset, aTokenAddress, amountFee, 0);
|
|
|
|
//solium-disable-next-line
|
|
emit FlashLoan(receiverAddress, asset, amount, amountFee);
|
|
}
|
|
|
|
/**
|
|
* @dev accessory functions to fetch data from the core contract
|
|
**/
|
|
|
|
function getReserveConfigurationData(address asset)
|
|
external
|
|
override
|
|
view
|
|
returns (
|
|
uint256 decimals,
|
|
uint256 ltv,
|
|
uint256 liquidationThreshold,
|
|
uint256 liquidationBonus,
|
|
address interestRateStrategyAddress,
|
|
bool usageAsCollateralEnabled,
|
|
bool borrowingEnabled,
|
|
bool stableBorrowRateEnabled,
|
|
bool isActive,
|
|
bool isFreezed
|
|
)
|
|
{
|
|
ReserveLogic.ReserveData storage reserve = _reserves[asset];
|
|
|
|
return (
|
|
reserve.configuration.getDecimals(),
|
|
reserve.configuration.getLtv(),
|
|
reserve.configuration.getLiquidationThreshold(),
|
|
reserve.configuration.getLiquidationBonus(),
|
|
reserve.interestRateStrategyAddress,
|
|
reserve.configuration.getLtv() != 0,
|
|
reserve.configuration.getBorrowingEnabled(),
|
|
reserve.configuration.getStableRateBorrowingEnabled(),
|
|
reserve.configuration.getActive(),
|
|
reserve.configuration.getFrozen()
|
|
);
|
|
}
|
|
|
|
function getReserveTokensAddresses(address asset)
|
|
external
|
|
override
|
|
view
|
|
returns (
|
|
address aTokenAddress,
|
|
address stableDebtTokenAddress,
|
|
address variableDebtTokenAddress
|
|
)
|
|
{
|
|
ReserveLogic.ReserveData storage reserve = _reserves[asset];
|
|
|
|
return (
|
|
reserve.aTokenAddress,
|
|
reserve.stableDebtTokenAddress,
|
|
reserve.variableDebtTokenAddress
|
|
);
|
|
}
|
|
|
|
function getReserveData(address asset)
|
|
external
|
|
override
|
|
view
|
|
returns (
|
|
uint256 availableLiquidity,
|
|
uint256 totalBorrowsStable,
|
|
uint256 totalBorrowsVariable,
|
|
uint256 liquidityRate,
|
|
uint256 variableBorrowRate,
|
|
uint256 stableBorrowRate,
|
|
uint256 averageStableBorrowRate,
|
|
uint256 liquidityIndex,
|
|
uint256 variableBorrowIndex,
|
|
uint40 lastUpdateTimestamp
|
|
)
|
|
{
|
|
ReserveLogic.ReserveData memory reserve = _reserves[asset];
|
|
return (
|
|
IERC20(asset).balanceOf(reserve.aTokenAddress),
|
|
IERC20(reserve.stableDebtTokenAddress).totalSupply(),
|
|
IERC20(reserve.variableDebtTokenAddress).totalSupply(),
|
|
reserve.currentLiquidityRate,
|
|
reserve.currentVariableBorrowRate,
|
|
reserve.currentStableBorrowRate,
|
|
IStableDebtToken(reserve.stableDebtTokenAddress).getAverageStableRate(),
|
|
reserve.lastLiquidityIndex,
|
|
reserve.lastVariableBorrowIndex,
|
|
reserve.lastUpdateTimestamp
|
|
);
|
|
}
|
|
|
|
function getUserAccountData(address user)
|
|
external
|
|
override
|
|
view
|
|
returns (
|
|
uint256 totalCollateralETH,
|
|
uint256 totalBorrowsETH,
|
|
uint256 availableBorrowsETH,
|
|
uint256 currentLiquidationThreshold,
|
|
uint256 ltv,
|
|
uint256 healthFactor
|
|
)
|
|
{
|
|
(
|
|
totalCollateralETH,
|
|
totalBorrowsETH,
|
|
ltv,
|
|
currentLiquidationThreshold,
|
|
healthFactor
|
|
) = GenericLogic.calculateUserAccountData(
|
|
user,
|
|
_reserves,
|
|
_usersConfig[user],
|
|
_reservesList,
|
|
_addressesProvider.getPriceOracle()
|
|
);
|
|
|
|
availableBorrowsETH = GenericLogic.calculateAvailableBorrowsETH(
|
|
totalCollateralETH,
|
|
totalBorrowsETH,
|
|
ltv
|
|
);
|
|
}
|
|
|
|
function getUserReserveData(address asset, address user)
|
|
external
|
|
override
|
|
view
|
|
returns (
|
|
uint256 currentATokenBalance,
|
|
uint256 currentStableDebt,
|
|
uint256 currentVariableDebt,
|
|
uint256 principalStableDebt,
|
|
uint256 principalVariableDebt,
|
|
uint256 stableBorrowRate,
|
|
uint256 liquidityRate,
|
|
uint256 variableBorrowIndex,
|
|
uint40 stableRateLastUpdated,
|
|
bool usageAsCollateralEnabled
|
|
)
|
|
{
|
|
ReserveLogic.ReserveData storage reserve = _reserves[asset];
|
|
|
|
currentATokenBalance = IERC20(reserve.aTokenAddress).balanceOf(user);
|
|
(currentStableDebt, currentVariableDebt) = Helpers.getUserCurrentDebt(user, reserve);
|
|
(principalStableDebt, principalVariableDebt) = Helpers.getUserPrincipalDebt(user, reserve);
|
|
liquidityRate = reserve.currentLiquidityRate;
|
|
stableBorrowRate = IStableDebtToken(reserve.stableDebtTokenAddress).getUserStableRate(user);
|
|
stableRateLastUpdated = IStableDebtToken(reserve.stableDebtTokenAddress).getUserLastUpdated(
|
|
user
|
|
);
|
|
usageAsCollateralEnabled = _usersConfig[user].isUsingAsCollateral(reserve.index);
|
|
variableBorrowIndex = IVariableDebtToken(reserve.variableDebtTokenAddress).getUserIndex(user);
|
|
}
|
|
|
|
function getReserves() external override view returns (address[] memory) {
|
|
return _reservesList;
|
|
}
|
|
|
|
receive() external payable {
|
|
revert();
|
|
}
|
|
|
|
/**
|
|
* @dev initializes a reserve
|
|
* @param asset the address of the reserve
|
|
* @param aTokenAddress the address of the overlying aToken contract
|
|
* @param interestRateStrategyAddress the address of the interest rate strategy contract
|
|
**/
|
|
function initReserve(
|
|
address asset,
|
|
address aTokenAddress,
|
|
address stableDebtAddress,
|
|
address variableDebtAddress,
|
|
address interestRateStrategyAddress
|
|
) external override onlyLendingPoolConfigurator {
|
|
_reserves[asset].init(
|
|
aTokenAddress,
|
|
stableDebtAddress,
|
|
variableDebtAddress,
|
|
interestRateStrategyAddress
|
|
);
|
|
_addReserveToList(asset);
|
|
}
|
|
|
|
/**
|
|
* @dev updates the address of the interest rate strategy contract
|
|
* @param asset the address of the reserve
|
|
* @param rateStrategyAddress the address of the interest rate strategy contract
|
|
**/
|
|
|
|
function setReserveInterestRateStrategyAddress(address asset, address rateStrategyAddress)
|
|
external
|
|
override
|
|
onlyLendingPoolConfigurator
|
|
{
|
|
_reserves[asset].interestRateStrategyAddress = rateStrategyAddress;
|
|
}
|
|
|
|
function setConfiguration(address asset, uint256 configuration)
|
|
external
|
|
override
|
|
onlyLendingPoolConfigurator
|
|
{
|
|
_reserves[asset].configuration.data = configuration;
|
|
}
|
|
|
|
function getConfiguration(address asset)
|
|
external
|
|
override
|
|
view
|
|
returns (ReserveConfiguration.Map memory)
|
|
{
|
|
return _reserves[asset].configuration;
|
|
}
|
|
|
|
/**
|
|
* @notice internal functions
|
|
**/
|
|
|
|
/**
|
|
* @dev adds a reserve to the array of the _reserves address
|
|
**/
|
|
function _addReserveToList(address asset) internal {
|
|
bool reserveAlreadyAdded = false;
|
|
for (uint256 i = 0; i < _reservesList.length; i++)
|
|
if (_reservesList[i] == asset) {
|
|
reserveAlreadyAdded = true;
|
|
}
|
|
if (!reserveAlreadyAdded) {
|
|
_reserves[asset].index = uint8(_reservesList.length);
|
|
_reservesList.push(asset);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @dev returns the normalized income per unit of asset
|
|
* @param asset the address of the reserve
|
|
* @return the reserve normalized income
|
|
*/
|
|
function getReserveNormalizedIncome(address asset) external override view returns (uint256) {
|
|
return _reserves[asset].getNormalizedIncome();
|
|
}
|
|
|
|
/**
|
|
* @dev returns the normalized variable debt per unit of asset
|
|
* @param asset the address of the reserve
|
|
* @return the reserve normalized debt
|
|
*/
|
|
function getReserveNormalizedVariableDebt(address asset)
|
|
external
|
|
override
|
|
view
|
|
returns (uint256)
|
|
{
|
|
return _reserves[asset].getNormalizedDebt();
|
|
}
|
|
|
|
/**
|
|
* @dev validate if a balance decrease for an asset is allowed
|
|
* @param asset the address of the reserve
|
|
* @param user the user related to the balance decrease
|
|
* @param amount the amount being transferred/redeemed
|
|
* @return true if the balance decrease can be allowed, false otherwise
|
|
*/
|
|
function balanceDecreaseAllowed(
|
|
address asset,
|
|
address user,
|
|
uint256 amount
|
|
) external override view returns (bool) {
|
|
return
|
|
GenericLogic.balanceDecreaseAllowed(
|
|
asset,
|
|
user,
|
|
amount,
|
|
_reserves,
|
|
_usersConfig[user],
|
|
_reservesList,
|
|
_addressesProvider.getPriceOracle()
|
|
);
|
|
}
|
|
|
|
/**
|
|
* @dev returns the list of the initialized reserves
|
|
**/
|
|
function getReservesList() external view returns (address[] memory) {
|
|
return _reservesList;
|
|
}
|
|
|
|
/**
|
|
* @dev returns the addresses provider
|
|
**/
|
|
function getAddressesProvider() external view returns (ILendingPoolAddressesProvider) {
|
|
return _addressesProvider;
|
|
}
|
|
}
|