// Sources flattened with hardhat v2.9.9 https://hardhat.org
// File src/interfaces/external/aave/DataTypes.sol
pragma solidity >=0.5.0;
// @dev Refer to the whitepaper, section 1.1 basic concepts for a formal description of these properties.
struct ReserveData {
// Stores the reserve configuration.
ReserveConfigurationMap configuration;
// The liquidity index. Expressed in ray.
uint128 liquidityIndex;
// Variable borrow index. Expressed in ray.
uint128 variableBorrowIndex;
// The current supply rate. Expressed in ray.
uint128 currentLiquidityRate;
// The current variable borrow rate. Expressed in ray.
uint128 currentVariableBorrowRate;
// The current stable borrow rate. Expressed in ray.
uint128 currentStableBorrowRate;
uint40 lastUpdateTimestamp;
// Tokens addresses.
address aTokenAddress;
address stableDebtTokenAddress;
address variableDebtTokenAddress;
// Address of the interest rate strategy.
address interestRateStrategyAddress;
// The id of the reserve. Represents the position in the list of the active reserves.
uint8 id;
}
struct ReserveConfigurationMap {
//bit 0-15: LTV
//bit 16-31: Liq. threshold
//bit 32-47: Liq. bonus
//bit 48-55: Decimals
//bit 56: Reserve is active
//bit 57: reserve is frozen
//bit 58: borrowing is enabled
//bit 59: stable rate borrowing enabled
//bit 60-63: reserved
//bit 64-79: reserve factor
uint256 data;
}
struct UserConfigurationMap {
uint256 data;
}
enum InterestRateMode {
NONE,
STABLE,
VARIABLE
}
// File src/interfaces/external/aave/ILendingPoolAddressesProvider.sol
pragma solidity >=0.5.0;
/// @title ILendingPoolAddressesProvider
/// @author Aave
///
/// @dev Main registry of addresses part of or connected to the protocol, including permissioned roles.
///
/// - Acting also as factory of proxies and admin of those, so with right to change its implementations.
/// - Owned by the Aave Governance.
interface ILendingPoolAddressesProvider {
event MarketIdSet(string newMarketId);
event LendingPoolUpdated(address indexed newAddress);
event ConfigurationAdminUpdated(address indexed newAddress);
event EmergencyAdminUpdated(address indexed newAddress);
event LendingPoolConfiguratorUpdated(address indexed newAddress);
event LendingPoolCollateralManagerUpdated(address indexed newAddress);
event PriceOracleUpdated(address indexed newAddress);
event LendingRateOracleUpdated(address indexed newAddress);
event ProxyCreated(bytes32 id, address indexed newAddress);
event AddressSet(bytes32 id, address indexed newAddress, bool hasProxy);
function getMarketId() external view returns (string memory);
function setMarketId(string calldata marketId) external;
function setAddress(bytes32 id, address newAddress) external;
function setAddressAsProxy(bytes32 id, address impl) external;
function getAddress(bytes32 id) external view returns (address);
function getLendingPool() external view returns (address);
function setLendingPoolImpl(address pool) external;
function getLendingPoolConfigurator() external view returns (address);
function setLendingPoolConfiguratorImpl(address configurator) external;
function getLendingPoolCollateralManager() external view returns (address);
function setLendingPoolCollateralManager(address manager) external;
function getPoolAdmin() external view returns (address);
function setPoolAdmin(address admin) external;
function getEmergencyAdmin() external view returns (address);
function setEmergencyAdmin(address admin) external;
function getPriceOracle() external view returns (address);
function setPriceOracle(address priceOracle) external;
function getLendingRateOracle() external view returns (address);
function setLendingRateOracle(address lendingRateOracle) external;
}
// File src/interfaces/external/aave/ILendingPool.sol
pragma solidity >=0.5.0;
interface ILendingPool {
/// @dev Emitted on `deposit`.
///
/// @param reserve The address of the underlying asset of the reserve.
/// @param user The address initiating the deposit.
/// @param onBehalfOf The beneficiary of the deposit, receiving the aTokens.
/// @param amount The amount deposited.
/// @param referral The referral code used.
event Deposit(
address indexed reserve,
address user,
address indexed onBehalfOf,
uint256 amount,
uint16 indexed referral
);
/// @dev Emitted on `withdraw`.
///
/// @param reserve The address of the underlying asset being withdrawn.
/// @param user The address initiating the withdrawal, owner of aTokens.
/// @param to Address that will receive the underlying.
/// @param amount The amount to be withdrawn.
event Withdraw(address indexed reserve, address indexed user, address indexed to, uint256 amount);
/// @dev Emitted on `borrow` and `flashLoan` when debt needs to be opened.
///
/// @param reserve The address of the underlying asset being borrowed.
/// @param user The address of the user initiating the `borrow`, receiving the funds on `borrow` or just
/// initiator of the transaction on `flashLoan`.
/// @param onBehalfOf The address that will be getting the debt.
/// @param amount The amount borrowed out.
/// @param borrowRateMode The rate mode: 1 for Stable, 2 for Variable.
/// @param borrowRate The numeric rate at which the user has borrowed.
/// @param referral The referral code used.
event Borrow(
address indexed reserve,
address user,
address indexed onBehalfOf,
uint256 amount,
uint256 borrowRateMode,
uint256 borrowRate,
uint16 indexed referral
);
/// @dev Emitted on `repay`.
///
/// @param reserve The address of the underlying asset of the reserve.
/// @param user The beneficiary of the repayment, getting his debt reduced.
/// @param repayer The address of the user initiating the `repay`, providing the funds.
/// @param amount The amount repaid.
event Repay(address indexed reserve, address indexed user, address indexed repayer, uint256 amount);
/// @dev Emitted on `swapBorrowRateMode`.
///
/// @param reserve The address of the underlying asset of the reserve
/// @param user The address of the user swapping his rate mode
/// @param rateMode The rate mode that the user wants to swap to
event Swap(address indexed reserve, address indexed user, uint256 rateMode);
/// @dev Emitted on `setUserUseReserveAsCollateral`.
///
/// @param reserve The address of the underlying asset of the reserve
/// @param user The address of the user enabling the usage as collateral
event ReserveUsedAsCollateralEnabled(address indexed reserve, address indexed user);
/// @dev Emitted on `setUserUseReserveAsCollateral`.
///
/// @param reserve The address of the underlying asset of the reserve
/// @param user The address of the user enabling the usage as collateral
event ReserveUsedAsCollateralDisabled(address indexed reserve, address indexed user);
/// @dev Emitted on `rebalanceStableBorrowRate`.
///
/// @param reserve The address of the underlying asset of the reserve
/// @param user The address of the user for which the rebalance has been executed
event RebalanceStableBorrowRate(address indexed reserve, address indexed user);
/// @dev Emitted on `flashLoan`.
///
/// @param target The address of the flash loan receiver contract.
/// @param initiator The address initiating the flash loan.
/// @param asset The address of the asset being flash borrowed.
/// @param amount The amount flash borrowed.
/// @param premium The fee flash borrowed.
/// @param referralCode The referral code used.
event FlashLoan(
address indexed target,
address indexed initiator,
address indexed asset,
uint256 amount,
uint256 premium,
uint16 referralCode
);
/// @dev Emitted when the pause is triggered.
event Paused();
/// @dev Emitted when the pause is lifted.
event Unpaused();
/// @dev Emitted when a borrower is liquidated. This event is emitted by the LendingPool via LendingPoolCollateral
/// manager using a DELEGATECALL.
///
/// This allows to have the events in the generated ABI for LendingPool.
///
/// @param collateralAsset The address of the underlying asset used as collateral, to receive as result of
/// the liquidation.
/// @param debtAsset The address of the underlying borrowed asset to be repaid with the liquidation.
/// @param user The address of the borrower getting liquidated.
/// @param debtToCover The debt amount of borrowed `asset` the liquidator wants to cover.
/// @param liquidatedCollateralAmount The amount of collateral received by the liquidator.
/// @param liquidator The address of the liquidator
/// @param receiveAToken `true` if the liquidators wants to receive the collateral aTokens, `false` if
/// he wants to receive the underlying collateral asset directly.
event LiquidationCall(
address indexed collateralAsset,
address indexed debtAsset,
address indexed user,
uint256 debtToCover,
uint256 liquidatedCollateralAmount,
address liquidator,
bool receiveAToken
);
/// @dev Emitted when the state of a reserve is updated.
///
/// NOTE: This event is actually declared in the ReserveLogic library and emitted in the `updateInterestRates`
/// function. Since the function is internal, the event will actually be fired by the LendingPool contract. The event
/// is therefore replicated here so it gets added to the LendingPool ABI.
///
/// @param reserve The address of the underlying asset of the reserve.
/// @param liquidityRate The new liquidity rate.
/// @param stableBorrowRate The new stable borrow rate.
/// @param variableBorrowRate The new variable borrow rate.
/// @param liquidityIndex The new liquidity index
/// @param variableBorrowIndex The new variable borrow index
event ReserveDataUpdated(
address indexed reserve,
uint256 liquidityRate,
uint256 stableBorrowRate,
uint256 variableBorrowRate,
uint256 liquidityIndex,
uint256 variableBorrowIndex
);
/// @dev Deposits an `amount` of underlying asset into the reserve, receiving in return overlying aTokens.
///
/// - E.g. User deposits 100 USDC and gets in return 100 aUSDC.
///
/// @param asset The address of the underlying asset to deposit.
/// @param amount The amount to be deposited.
/// @param onBehalfOf The address that will receive the aTokens, same as msg.sender if the user wants to receive
/// them on his own wallet, or a different address if the beneficiary of aTokens is a different
/// wallet.
/// @param referralCode Code used to register the integrator originating the operation, for potential rewards.0 if the
/// action is executed directly by the user, without any middle-man
function deposit(
address asset,
uint256 amount,
address onBehalfOf,
uint16 referralCode
) external;
/// @dev Withdraws an `amount` of underlying asset from the reserve, burning the equivalent aTokens owned.
///
/// E.g. User has 100 aUSDC, calls `withdraw` and receives 100 USDC, burning the 100 aUSDC.
///
/// @param asset The address of the underlying asset to withdraw
/// @param amount The underlying amount to be withdrawn.
/// @param to Address that will receive the underlying, same as msg.sender if the user wants to receive it on his
/// own wallet, or a different address if the beneficiary is a different wallet.
///
/// @return amountWithdrawn The final amount withdrawn
function withdraw(
address asset,
uint256 amount,
address to
) external returns (uint256 amountWithdrawn);
/// @dev Allows users to borrow a specific `amount` of the reserve underlying asset, provided that the borrower
/// already deposited enough collateral, or he was given enough allowance by a credit delegator on the
/// corresponding debt token (StableDebtToken or VariableDebtToken).
///
/// - E.g. User borrows 100 USDC passing as `onBehalfOf` his own address, receiving the 100 USDC in his wallet and
/// 100 stable/variable debt tokens, depending on the `interestRateMode`.
///
/// @param asset The address of the underlying asset to borrow.
/// @param amount The amount to be borrowed.
/// @param interestRateMode The interest rate mode at which the user wants to borrow: 1 for Stable, 2 for Variable
/// @param referralCode Code used to register the integrator originating the operation, for potential rewards.
/// 0 if the action is executed directly by the user, without any middle-man
/// @param onBehalfOf Address of the user who will receive the debt. Should be the address of the borrower
/// itself calling the function if he wants to borrow against his own collateral, or the
/// address of the credit delegator if he has been given credit delegation allowance
function borrow(
address asset,
uint256 amount,
uint256 interestRateMode,
uint16 referralCode,
address onBehalfOf
) external;
/// @notice Repays a borrowed `amount` on a specific reserve, burning the equivalent debt tokens owned.
///
/// - E.g. User repays 100 USDC, burning 100 variable/stable debt tokens of the `onBehalfOf` address.
///
/// @param asset The address of the borrowed underlying asset previously borrowed.
/// @param amount The amount to repay.
/// @param rateMode The interest rate mode at of the debt the user wants to repay: 1 for Stable, 2 for Variable
/// @param onBehalfOf Address of the user who will get his debt reduced/removed. Should be the address of the user
/// calling the function if he wants to reduce/remove his own debt, or the address of any other
/// other borrower whose debt should be removed.
///
/// @return amountRepaid The final amount repaid.
function repay(
address asset,
uint256 amount,
uint256 rateMode,
address onBehalfOf
) external returns (uint256 amountRepaid);
/// @dev Allows a borrower to swap his debt between stable and variable mode, or vice versa.
///
/// @param asset The address of the underlying asset borrowed.
/// @param rateMode The rate mode that the user wants to swap to.
function swapBorrowRateMode(address asset, uint256 rateMode) external;
/// @dev Rebalances the stable interest rate of a user to the current stable rate defined on the reserve.
///
/// - Users can be rebalanced if the following conditions are satisfied:
/// 1. Usage ratio is above 95%
/// 2. the current deposit APY is below REBALANCE_UP_THRESHOLD maxVariableBorrowRate, which means that too much
/// has been borrowed at a stable rate and depositors are not earning enough.
///
/// @param asset The address of the underlying asset borrowed.
/// @param user The address of the user to be rebalanced.
function rebalanceStableBorrowRate(address asset, address user) external;
/// @dev Allows depositors to enable/disable a specific deposited asset as collateral.
///
/// @param asset The address of the underlying asset deposited.
/// @param useAsCollateral `true` if the user wants to use the deposit as collateral, `false` otherwise.
function setUserUseReserveAsCollateral(address asset, bool useAsCollateral) external;
/// @dev Function to liquidate a non-healthy position collateral-wise, with Health Factor below 1.
///
/// - The caller (liquidator) covers `debtToCover` amount of debt of the user getting liquidated, and receives a
/// proportionally amount of the `collateralAsset` plus a bonus to cover market risk.
///
/// @param collateralAsset The address of the underlying asset used as collateral, to receive as result of the
/// liquidation.
/// @param debtAsset The address of the underlying borrowed asset to be repaid with the liquidation.
/// @param user The address of the borrower getting liquidated.
/// @param debtToCover The debt amount of borrowed `asset` the liquidator wants to cover.
/// @param receiveAToken `true` if the liquidators wants to receive the collateral aTokens, `false` if he wants to
/// receive the underlying collateral asset directly
function liquidationCall(
address collateralAsset,
address debtAsset,
address user,
uint256 debtToCover,
bool receiveAToken
) external;
/// @dev Allows smart contracts to access the liquidity of the pool within one transaction, as long as the amount
/// taken plus a fee is returned.
///
/// IMPORTANT There are security concerns for developers of flash loan 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, implementing the IFlashLoanReceiver
/// interface.
/// @param assets The addresses of the assets being flash-borrowed.
/// @param amounts The amounts amounts being flash-borrowed.
/// @param modes Types of the debt to open if the flash loan is not returned.
/// @param onBehalfOf The address that will receive the debt in the case of using on `modes` 1 or 2.
/// @param params Variadic packed params to pass to the receiver as extra information.
/// @param referralCode Code used to register the integrator originating the operation, for potential rewards. 0
/// if the action is executed directly by the user, without any middle-man
function flashLoan(
address receiverAddress,
address[] calldata assets,
uint256[] calldata amounts,
uint256[] calldata modes,
address onBehalfOf,
bytes calldata params,
uint16 referralCode
) external;
/// @dev Returns the user account data across all the reserves.
///
/// @param user The address of the user.
///
/// @return totalCollateralETH The total collateral in ETH of the user.
/// @return totalDebtETH The total debt in ETH of the user.
/// @return availableBorrowsETH The borrowing power left of the user.
/// @return currentLiquidationThreshold The liquidation threshold of the user.
/// @return ltv The loan to value of the user.
/// @return healthFactor The current health factor of the user.
function getUserAccountData(address user)
external
view
returns (
uint256 totalCollateralETH,
uint256 totalDebtETH,
uint256 availableBorrowsETH,
uint256 currentLiquidationThreshold,
uint256 ltv,
uint256 healthFactor
);
function initReserve(
address reserve,
address aTokenAddress,
address stableDebtAddress,
address variableDebtAddress,
address interestRateStrategyAddress
) external;
/**
* @notice Supplies an `amount` of underlying asset into the reserve, receiving in return overlying aTokens.
* - E.g. User supplies 100 USDC and gets in return 100 aUSDC
* @param asset The address of the underlying asset to supply
* @param amount The amount to be supplied
* @param onBehalfOf The address that will receive the aTokens, same as msg.sender if the user
* wants to receive them on his own wallet, or a different address if the beneficiary of aTokens
* is a different wallet
* @param referralCode Code used to register the integrator originating the operation, for potential rewards.
* 0 if the action is executed directly by the user, without any middle-man
**/
function supply(
address asset,
uint256 amount,
address onBehalfOf,
uint16 referralCode
) external;
function setReserveInterestRateStrategyAddress(address reserve, address rateStrategyAddress) external;
function setConfiguration(address reserve, uint256 configuration) external;
/// @dev Returns the configuration of the reserve.
///
/// @param asset The address of the underlying asset of the reserve.
///
/// @return The configuration of the reserve.
function getConfiguration(address asset) external view returns (ReserveConfigurationMap memory);
/// @dev Returns the configuration of the user across all the reserves.
///
/// @param user The user address.
///
/// @return The configuration of the user.
function getUserConfiguration(address user) external view returns (UserConfigurationMap memory);
/// @dev Returns the normalized income normalized income of the reserve.
///
/// @param asset The address of the underlying asset of the reserve.
///
/// @return The reserve's normalized income.
function getReserveNormalizedIncome(address asset) external view returns (uint256);
/// @dev Returns the normalized variable debt per unit of asset.`
///
/// @param asset The address of the underlying asset of the reserve.
///
/// @return The reserve normalized variable debt.
function getReserveNormalizedVariableDebt(address asset) external view returns (uint256);
/// @dev Returns the state and configuration of the reserve.
///
/// @param asset The address of the underlying asset of the reserve.
///
/// @return The state of the reserve.
function getReserveData(address asset) external view returns (ReserveData memory);
function finalizeTransfer(
address asset,
address from,
address to,
uint256 amount,
uint256 balanceFromAfter,
uint256 balanceToBefore
) external;
function getReservesList() external view returns (address[] memory);
function getAddressesProvider() external view returns (ILendingPoolAddressesProvider);
function setPause(bool val) external;
function paused() external view returns (bool);
}
// File lib/openzeppelin-contracts/contracts/token/ERC20/IERC20.sol
// 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);
}
// File lib/openzeppelin-contracts/contracts/token/ERC20/extensions/IERC20Metadata.sol
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.0;
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*
* _Available since v4.1._
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// File src/interfaces/external/aave/IScaledBalanceToken.sol
pragma solidity >=0.5.0;
interface IScaledBalanceToken {
/// @dev Returns the scaled balance of the user. The scaled balance is the sum of all the updated stored balance
/// divided by the reserve's liquidity index at the moment of the update.
///
/// @param user The user whose balance is calculated.
///
/// @return The scaled balance of the user.
function scaledBalanceOf(address user) external view returns (uint256);
/// @dev Returns the scaled balance of the user and the scaled total supply.
///
/// @param user The address of the user.
///
/// @return scaledBalance The scaled balance of the user.
/// @return scaledTotalSupply The scaled balance and the scaled total supply.
function getScaledUserBalanceAndSupply(address user)
external view
returns (
uint256 scaledBalance,
uint256 scaledTotalSupply
);
/// @dev Returns the scaled total supply of the variable debt token. Represents sum(debt/index).
///
/// @return The scaled total supply.
function scaledTotalSupply() external view returns (uint256);
}
// File src/interfaces/external/aave/IAaveIncentivesController.sol
pragma solidity >=0.5.0;
interface IAaveIncentivesController {
event RewardsAccrued(address indexed user, uint256 amount);
event RewardsClaimed(address indexed user, address indexed to, uint256 amount);
event RewardsClaimed(
address indexed user,
address indexed to,
address indexed claimer,
uint256 amount
);
event ClaimerSet(address indexed user, address indexed claimer);
/*
* @dev Returns the configuration of the distribution for a certain asset
* @param asset The address of the reference asset of the distribution
* @return The asset index, the emission per second and the last updated timestamp
**/
function getAssetData(address asset)
external
view
returns (
uint256,
uint256,
uint256
);
/**
* @dev Whitelists an address to claim the rewards on behalf of another address
* @param user The address of the user
* @param claimer The address of the claimer
*/
function setClaimer(address user, address claimer) external;
/**
* @dev Returns the whitelisted claimer for a certain address (0x0 if not set)
* @param user The address of the user
* @return The claimer address
*/
function getClaimer(address user) external view returns (address);
/**
* @dev Configure assets for a certain rewards emission
* @param assets The assets to incentivize
* @param emissionsPerSecond The emission for each asset
*/
function configureAssets(address[] calldata assets, uint256[] calldata emissionsPerSecond)
external;
/**
* @dev Called by the corresponding asset on any update that affects the rewards distribution
* @param asset The address of the user
* @param userBalance The balance of the user of the asset in the lending pool
* @param totalSupply The total supply of the asset in the lending pool
**/
function handleAction(
address asset,
uint256 userBalance,
uint256 totalSupply
) external;
/**
* @dev Returns the total of rewards of an user, already accrued + not yet accrued
* @param user The address of the user
* @return The rewards
**/
function getRewardsBalance(address[] calldata assets, address user)
external
view
returns (uint256);
/**
* @dev Claims reward for an user, on all the assets of the lending pool, accumulating the pending rewards
* @param amount Amount of rewards to claim
* @param to Address that will be receiving the rewards
* @return Rewards claimed
**/
function claimRewards(
address[] calldata assets,
uint256 amount,
address to
) external returns (uint256);
/**
* @dev Claims reward for an user on behalf, on all the assets of the lending pool, accumulating the pending rewards. The caller must
* be whitelisted via "allowClaimOnBehalf" function by the RewardsAdmin role manager
* @param amount Amount of rewards to claim
* @param user Address to check and claim rewards
* @param to Address that will be receiving the rewards
* @return Rewards claimed
**/
function claimRewardsOnBehalf(
address[] calldata assets,
uint256 amount,
address user,
address to
) external returns (uint256);
/**
* @dev returns the unclaimed rewards of the user
* @param user the address of the user
* @return the unclaimed user rewards
*/
function getUserUnclaimedRewards(address user) external view returns (uint256);
/**
* @dev returns the unclaimed rewards of the user
* @param user the address of the user
* @param asset The asset to incentivize
* @return the user index for the asset
*/
function getUserAssetData(address user, address asset) external view returns (uint256);
/**
* @dev for backward compatibility with previous implementation of the Incentives controller
*/
function REWARD_TOKEN() external view returns (address);
/**
* @dev for backward compatibility with previous implementation of the Incentives controller
*/
function PRECISION() external view returns (uint8);
}
// File src/interfaces/external/aave/IInitializableAToken.sol
pragma solidity >=0.5.0;
/**
* @title IInitializableAToken
* @notice Interface for the initialize function on AToken
* @author Aave
**/
interface IInitializableAToken {
/**
* @dev Emitted when an aToken is initialized
* @param underlyingAsset The address of the underlying asset
* @param pool The address of the associated lending pool
* @param treasury The address of the treasury
* @param incentivesController The address of the incentives controller for this aToken
* @param aTokenDecimals the decimals of the underlying
* @param aTokenName the name of the aToken
* @param aTokenSymbol the symbol of the aToken
* @param params A set of encoded parameters for additional initialization
**/
event Initialized(
address indexed underlyingAsset,
address indexed pool,
address treasury,
address incentivesController,
uint8 aTokenDecimals,
string aTokenName,
string aTokenSymbol,
bytes params
);
/**
* @dev Initializes the aToken
* @param pool The address of the lending pool where this aToken will be used
* @param treasury The address of the Aave treasury, receiving the fees on this aToken
* @param underlyingAsset The address of the underlying asset of this aToken (E.g. WETH for aWETH)
* @param incentivesController The smart contract managing potential incentives distribution
* @param aTokenDecimals The decimals of the aToken, same as the underlying asset's
* @param aTokenName The name of the aToken
* @param aTokenSymbol The symbol of the aToken
*/
function initialize(
ILendingPool pool,
address treasury,
address underlyingAsset,
IAaveIncentivesController incentivesController,
uint8 aTokenDecimals,
string calldata aTokenName,
string calldata aTokenSymbol,
bytes calldata params
) external;
}
// File src/interfaces/external/aave/IAToken.sol
pragma solidity >=0.5.0;
interface IAToken is IERC20, IScaledBalanceToken, IInitializableAToken {
/**
* @dev Emitted after the mint action
* @param from The address performing the mint
* @param value The amount being
* @param index The new liquidity index of the reserve
**/
event Mint(address indexed from, uint256 value, uint256 index);
/**
* @dev Mints `amount` aTokens to `user`
* @param user The address receiving the minted tokens
* @param amount The amount of tokens getting minted
* @param index The new liquidity index of the reserve
* @return `true` if the the previous balance of the user was 0
*/
function mint(
address user,
uint256 amount,
uint256 index
) external returns (bool);
/**
* @dev Emitted after aTokens are burned
* @param from The owner of the aTokens, getting them burned
* @param target The address that will receive the underlying
* @param value The amount being burned
* @param index The new liquidity index of the reserve
**/
event Burn(address indexed from, address indexed target, uint256 value, uint256 index);
/**
* @dev Emitted during the transfer action
* @param from The user whose tokens are being transferred
* @param to The recipient
* @param value The amount being transferred
* @param index The new liquidity index of the reserve
**/
event BalanceTransfer(address indexed from, address indexed to, uint256 value, uint256 index);
/**
* @dev Burns aTokens from `user` and sends the equivalent amount of underlying to `receiverOfUnderlying`
* @param user The owner of the aTokens, getting them burned
* @param receiverOfUnderlying The address that will receive the underlying
* @param amount The amount being burned
* @param index The new liquidity index of the reserve
**/
function burn(
address user,
address receiverOfUnderlying,
uint256 amount,
uint256 index
) external;
/**
* @dev Mints aTokens to the reserve treasury
* @param amount The amount of tokens getting minted
* @param index The new liquidity index of the reserve
*/
function mintToTreasury(uint256 amount, uint256 index) external;
/**
* @dev Transfers aTokens in the event of a borrow being liquidated, in case the liquidators reclaims the aToken
* @param from The address getting liquidated, current owner of the aTokens
* @param to The recipient
* @param value The amount of tokens getting transferred
**/
function transferOnLiquidation(
address from,
address to,
uint256 value
) external;
/**
* @dev Transfers the underlying asset to `target`. Used by the LendingPool to transfer
* assets in borrow(), withdraw() and flashLoan()
* @param user The recipient of the underlying
* @param amount The amount getting transferred
* @return The amount transferred
**/
function transferUnderlyingTo(address user, uint256 amount) external returns (uint256);
/**
* @dev Invoked to execute actions on the aToken side after a repayment.
* @param user The user executing the repayment
* @param amount The amount getting repaid
**/
function handleRepayment(address user, uint256 amount) external;
/**
* @dev Returns the address of the incentives controller contract
**/
function getIncentivesController() external view returns (IAaveIncentivesController);
/**
* @dev Returns the address of the underlying asset of this aToken (E.g. WETH for aWETH)
**/
function UNDERLYING_ASSET_ADDRESS() external view returns (address);
}
// File src/interfaces/external/aave/IRewardsController.sol
pragma solidity >=0.8.10;
/**
* @title IRewardsController
* @author Aave
* @notice Defines the basic interface for a Rewards Controller.
*/
interface IRewardsController {
/**
* @dev Whitelists an address to claim the rewards on behalf of another address
* @param user The address of the user
* @param claimer The address of the claimer
*/
function setClaimer(address user, address claimer) external;
/**
* @dev Get the price aggregator oracle address
* @param reward The address of the reward
* @return The price oracle of the reward
*/
function getRewardOracle(address reward) external view returns (address);
/**
* @dev Returns the whitelisted claimer for a certain address (0x0 if not set)
* @param user The address of the user
* @return The claimer address
*/
function getClaimer(address user) external view returns (address);
/**
* @dev Returns the Transfer Strategy implementation contract address being used for a reward address
* @param reward The address of the reward
* @return The address of the TransferStrategy contract
*/
function getTransferStrategy(address reward) external view returns (address);
/**
* @dev Called by the corresponding asset on any update that affects the rewards distribution
* @param user The address of the user
* @param userBalance The user balance of the asset
* @param totalSupply The total supply of the asset
**/
function handleAction(
address user,
uint256 userBalance,
uint256 totalSupply
) external;
/**
* @dev Claims reward for a user to the desired address, on all the assets of the pool, accumulating the pending rewards
* @param assets List of assets to check eligible distributions before claiming rewards
* @param amount The amount of rewards to claim
* @param to The address that will be receiving the rewards
* @param reward The address of the reward token
* @return The amount of rewards claimed
**/
function claimRewards(
address[] calldata assets,
uint256 amount,
address to,
address reward
) external returns (uint256);
/**
* @dev Returns a single rewards balance of a user, including virtually accrued and unrealized claimable rewards.
* @param assets List of incentivized assets to check eligible distributions
* @param user The address of the user
* @param reward The address of the reward token
* @return The rewards amount
**/
function getUserRewards(
address[] calldata assets,
address user,
address reward
) external view returns (uint256);
/**
* @dev Claims reward for a user on behalf, on all the assets of the pool, accumulating the pending rewards. The
* caller must be whitelisted via "allowClaimOnBehalf" function by the RewardsAdmin role manager
* @param assets The list of assets to check eligible distributions before claiming rewards
* @param amount The amount of rewards to claim
* @param user The address to check and claim rewards
* @param to The address that will be receiving the rewards
* @param reward The address of the reward token
* @return The amount of rewards claimed
**/
function claimRewardsOnBehalf(
address[] calldata assets,
uint256 amount,
address user,
address to,
address reward
) external returns (uint256);
/**
* @dev Claims reward for msg.sender, on all the assets of the pool, accumulating the pending rewards
* @param assets The list of assets to check eligible distributions before claiming rewards
* @param amount The amount of rewards to claim
* @param reward The address of the reward token
* @return The amount of rewards claimed
**/
function claimRewardsToSelf(
address[] calldata assets,
uint256 amount,
address reward
) external returns (uint256);
/**
* @dev Claims all rewards for a user to the desired address, on all the assets of the pool, accumulating the pending rewards
* @param assets The list of assets to check eligible distributions before claiming rewards
* @param to The address that will be receiving the rewards
* @return rewardsList List of addresses of the reward tokens
* @return claimedAmounts List that contains the claimed amount per reward, following same order as "rewardList"
**/
function claimAllRewards(address[] calldata assets, address to)
external
returns (address[] memory rewardsList, uint256[] memory claimedAmounts);
/**
* @dev Claims all rewards for a user on behalf, on all the assets of the pool, accumulating the pending rewards. The caller must
* be whitelisted via "allowClaimOnBehalf" function by the RewardsAdmin role manager
* @param assets The list of assets to check eligible distributions before claiming rewards
* @param user The address to check and claim rewards
* @param to The address that will be receiving the rewards
* @return rewardsList List of addresses of the reward tokens
* @return claimedAmounts List that contains the claimed amount per reward, following same order as "rewardsList"
**/
function claimAllRewardsOnBehalf(
address[] calldata assets,
address user,
address to
) external returns (address[] memory rewardsList, uint256[] memory claimedAmounts);
/**
* @dev Claims all reward for msg.sender, on all the assets of the pool, accumulating the pending rewards
* @param assets The list of assets to check eligible distributions before claiming rewards
* @return rewardsList List of addresses of the reward tokens
* @return claimedAmounts List that contains the claimed amount per reward, following same order as "rewardsList"
**/
function claimAllRewardsToSelf(address[] calldata assets)
external
returns (address[] memory rewardsList, uint256[] memory claimedAmounts);
/**
* @dev Returns the accrued rewards balance of a user, not including virtually accrued rewards since last distribution.
* @param user The address of the user
* @param reward The address of the reward token
* @return Unclaimed rewards, not including new distributions
**/
function getUserAccruedRewards(address user, address reward) external view returns (uint256);
}
// File lib/openzeppelin-contracts/contracts/utils/Context.sol
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)
pragma solidity ^0.8.0;
/**
* @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 Context {
function _msgSender() internal view virtual returns (address) {
return msg.sender;
}
function _msgData() internal view virtual returns (bytes calldata) {
return msg.data;
}
}
// File lib/openzeppelin-contracts/contracts/token/ERC20/ERC20.sol
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/ERC20.sol)
pragma solidity ^0.8.0;
/**
* @dev Implementation of the {IERC20} interface.
*
* This implementation is agnostic to the way tokens are created. This means
* that a supply mechanism has to be added in a derived contract using {_mint}.
* For a generic mechanism see {ERC20PresetMinterPauser}.
*
* TIP: For a detailed writeup see our guide
* https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How
* to implement supply mechanisms].
*
* We have followed general OpenZeppelin Contracts guidelines: functions revert
* instead returning `false` on failure. This behavior is nonetheless
* conventional and does not conflict with the expectations of ERC20
* applications.
*
* Additionally, an {Approval} event is emitted on calls to {transferFrom}.
* This allows applications to reconstruct the allowance for all accounts just
* by listening to said events. Other implementations of the EIP may not emit
* these events, as it isn't required by the specification.
*
* Finally, the non-standard {decreaseAllowance} and {increaseAllowance}
* functions have been added to mitigate the well-known issues around setting
* allowances. See {IERC20-approve}.
*/
contract ERC20 is Context, IERC20, IERC20Metadata {
mapping(address => uint256) private _balances;
mapping(address => mapping(address => uint256)) private _allowances;
uint256 private _totalSupply;
string private _name;
string private _symbol;
/**
* @dev Sets the values for {name} and {symbol}.
*
* The default value of {decimals} is 18. To select a different value for
* {decimals} you should overload it.
*
* All two of these values are immutable: they can only be set once during
* construction.
*/
constructor(string memory name_, string memory symbol_) {
_name = name_;
_symbol = symbol_;
}
/**
* @dev Returns the name of the token.
*/
function name() public view virtual override returns (string memory) {
return _name;
}
/**
* @dev Returns the symbol of the token, usually a shorter version of the
* name.
*/
function symbol() public view virtual override returns (string memory) {
return _symbol;
}
/**
* @dev Returns the number of decimals used to get its user representation.
* For example, if `decimals` equals `2`, a balance of `505` tokens should
* be displayed to a user as `5.05` (`505 / 10 ** 2`).
*
* Tokens usually opt for a value of 18, imitating the relationship between
* Ether and Wei. This is the value {ERC20} uses, unless this function is
* overridden;
*
* NOTE: This information is only used for _display_ purposes: it in
* no way affects any of the arithmetic of the contract, including
* {IERC20-balanceOf} and {IERC20-transfer}.
*/
function decimals() public view virtual override returns (uint8) {
return 18;
}
/**
* @dev See {IERC20-totalSupply}.
*/
function totalSupply() public view virtual override returns (uint256) {
return _totalSupply;
}
/**
* @dev See {IERC20-balanceOf}.
*/
function balanceOf(address account) public view virtual override returns (uint256) {
return _balances[account];
}
/**
* @dev See {IERC20-transfer}.
*
* Requirements:
*
* - `to` cannot be the zero address.
* - the caller must have a balance of at least `amount`.
*/
function transfer(address to, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_transfer(owner, to, amount);
return true;
}
/**
* @dev See {IERC20-allowance}.
*/
function allowance(address owner, address spender) public view virtual override returns (uint256) {
return _allowances[owner][spender];
}
/**
* @dev See {IERC20-approve}.
*
* NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on
* `transferFrom`. This is semantically equivalent to an infinite approval.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function approve(address spender, uint256 amount) public virtual override returns (bool) {
address owner = _msgSender();
_approve(owner, spender, amount);
return true;
}
/**
* @dev See {IERC20-transferFrom}.
*
* Emits an {Approval} event indicating the updated allowance. This is not
* required by the EIP. See the note at the beginning of {ERC20}.
*
* NOTE: Does not update the allowance if the current allowance
* is the maximum `uint256`.
*
* Requirements:
*
* - `from` and `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
* - the caller must have allowance for ``from``'s tokens of at least
* `amount`.
*/
function transferFrom(
address from,
address to,
uint256 amount
) public virtual override returns (bool) {
address spender = _msgSender();
_spendAllowance(from, spender, amount);
_transfer(from, to, amount);
return true;
}
/**
* @dev Atomically increases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
*/
function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
address owner = _msgSender();
_approve(owner, spender, allowance(owner, spender) + addedValue);
return true;
}
/**
* @dev Atomically decreases the allowance granted to `spender` by the caller.
*
* This is an alternative to {approve} that can be used as a mitigation for
* problems described in {IERC20-approve}.
*
* Emits an {Approval} event indicating the updated allowance.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `spender` must have allowance for the caller of at least
* `subtractedValue`.
*/
function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
address owner = _msgSender();
uint256 currentAllowance = allowance(owner, spender);
require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
unchecked {
_approve(owner, spender, currentAllowance - subtractedValue);
}
return true;
}
/**
* @dev Moves `amount` of tokens from `from` to `to`.
*
* This internal function is equivalent to {transfer}, and can be used to
* e.g. implement automatic token fees, slashing mechanisms, etc.
*
* Emits a {Transfer} event.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `from` must have a balance of at least `amount`.
*/
function _transfer(
address from,
address to,
uint256 amount
) internal virtual {
require(from != address(0), "ERC20: transfer from the zero address");
require(to != address(0), "ERC20: transfer to the zero address");
_beforeTokenTransfer(from, to, amount);
uint256 fromBalance = _balances[from];
require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
unchecked {
_balances[from] = fromBalance - amount;
// Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by
// decrementing then incrementing.
_balances[to] += amount;
}
emit Transfer(from, to, amount);
_afterTokenTransfer(from, to, amount);
}
/** @dev Creates `amount` tokens and assigns them to `account`, increasing
* the total supply.
*
* Emits a {Transfer} event with `from` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
*/
function _mint(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: mint to the zero address");
_beforeTokenTransfer(address(0), account, amount);
_totalSupply += amount;
unchecked {
// Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.
_balances[account] += amount;
}
emit Transfer(address(0), account, amount);
_afterTokenTransfer(address(0), account, amount);
}
/**
* @dev Destroys `amount` tokens from `account`, reducing the
* total supply.
*
* Emits a {Transfer} event with `to` set to the zero address.
*
* Requirements:
*
* - `account` cannot be the zero address.
* - `account` must have at least `amount` tokens.
*/
function _burn(address account, uint256 amount) internal virtual {
require(account != address(0), "ERC20: burn from the zero address");
_beforeTokenTransfer(account, address(0), amount);
uint256 accountBalance = _balances[account];
require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
unchecked {
_balances[account] = accountBalance - amount;
// Overflow not possible: amount <= accountBalance <= totalSupply.
_totalSupply -= amount;
}
emit Transfer(account, address(0), amount);
_afterTokenTransfer(account, address(0), amount);
}
/**
* @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.
*
* This internal function is equivalent to `approve`, and can be used to
* e.g. set automatic allowances for certain subsystems, etc.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `owner` cannot be the zero address.
* - `spender` cannot be the zero address.
*/
function _approve(
address owner,
address spender,
uint256 amount
) internal virtual {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
/**
* @dev Updates `owner` s allowance for `spender` based on spent `amount`.
*
* Does not update the allowance amount in case of infinite allowance.
* Revert if not enough allowance is available.
*
* Might emit an {Approval} event.
*/
function _spendAllowance(
address owner,
address spender,
uint256 amount
) internal virtual {
uint256 currentAllowance = allowance(owner, spender);
if (currentAllowance != type(uint256).max) {
require(currentAllowance >= amount, "ERC20: insufficient allowance");
unchecked {
_approve(owner, spender, currentAllowance - amount);
}
}
}
/**
* @dev Hook that is called before any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* will be transferred to `to`.
* - when `from` is zero, `amount` tokens will be minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens will be burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _beforeTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
/**
* @dev Hook that is called after any transfer of tokens. This includes
* minting and burning.
*
* Calling conditions:
*
* - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens
* has been transferred to `to`.
* - when `from` is zero, `amount` tokens have been minted for `to`.
* - when `to` is zero, `amount` of ``from``'s tokens have been burned.
* - `from` and `to` are never both zero.
*
* To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].
*/
function _afterTokenTransfer(
address from,
address to,
uint256 amount
) internal virtual {}
}
// File lib/openzeppelin-contracts/contracts/token/ERC20/extensions/draft-IERC20Permit.sol
// 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);
}
// File lib/openzeppelin-contracts/contracts/utils/Address.sol
// OpenZeppelin Contracts (last updated v4.7.0) (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://consensys.net/diligence/blog/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);
}
}
}
// File lib/openzeppelin-contracts/contracts/token/ERC20/utils/SafeERC20.sol
// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/utils/SafeERC20.sol)
pragma solidity ^0.8.0;
/**
* @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");
}
}
}
// File src/external/aave/Errors.sol
pragma solidity >=0.5.0;
/**
* @title Errors library
* @author Aave
* @notice Defines the error messages emitted by the different contracts of the Aave protocol
* @dev Error messages prefix glossary:
* - VL = ValidationLogic
* - MATH = Math libraries
* - CT = Common errors between tokens (AToken, VariableDebtToken and StableDebtToken)
* - AT = AToken
* - SDT = StableDebtToken
* - VDT = VariableDebtToken
* - LP = LendingPool
* - LPAPR = LendingPoolAddressesProviderRegistry
* - LPC = LendingPoolConfiguration
* - RL = ReserveLogic
* - LPCM = LendingPoolCollateralManager
* - P = Pausable
*/
library Errors {
//common errors
string public constant CALLER_NOT_POOL_ADMIN = '33'; // 'The caller must be the pool admin'
string public constant BORROW_ALLOWANCE_NOT_ENOUGH = '59'; // User borrows on behalf, but allowance are too small
//contract specific errors
string public constant VL_INVALID_AMOUNT = '1'; // 'Amount must be greater than 0'
string public constant VL_NO_ACTIVE_RESERVE = '2'; // 'Action requires an active reserve'
string public constant VL_RESERVE_FROZEN = '3'; // 'Action cannot be performed because the reserve is frozen'
string public constant VL_CURRENT_AVAILABLE_LIQUIDITY_NOT_ENOUGH = '4'; // 'The current liquidity is not enough'
string public constant VL_NOT_ENOUGH_AVAILABLE_USER_BALANCE = '5'; // 'User cannot withdraw more than the available balance'
string public constant VL_TRANSFER_NOT_ALLOWED = '6'; // 'Transfer cannot be allowed.'
string public constant VL_BORROWING_NOT_ENABLED = '7'; // 'Borrowing is not enabled'
string public constant VL_INVALID_INTEREST_RATE_MODE_SELECTED = '8'; // 'Invalid interest rate mode selected'
string public constant VL_COLLATERAL_BALANCE_IS_0 = '9'; // 'The collateral balance is 0'
string public constant VL_HEALTH_FACTOR_LOWER_THAN_LIQUIDATION_THRESHOLD = '10'; // 'Health factor is lesser than the liquidation threshold'
string public constant VL_COLLATERAL_CANNOT_COVER_NEW_BORROW = '11'; // 'There is not enough collateral to cover a new borrow'
string public constant VL_STABLE_BORROWING_NOT_ENABLED = '12'; // stable borrowing not enabled
string public constant VL_COLLATERAL_SAME_AS_BORROWING_CURRENCY = '13'; // collateral is (mostly) the same currency that is being borrowed
string public constant VL_AMOUNT_BIGGER_THAN_MAX_LOAN_SIZE_STABLE = '14'; // 'The requested amount is greater than the max loan size in stable rate mode
string public constant VL_NO_DEBT_OF_SELECTED_TYPE = '15'; // 'for repayment of stable debt, the user needs to have stable debt, otherwise, he needs to have variable debt'
string public constant VL_NO_EXPLICIT_AMOUNT_TO_REPAY_ON_BEHALF = '16'; // 'To repay on behalf of an user an explicit amount to repay is needed'
string public constant VL_NO_STABLE_RATE_LOAN_IN_RESERVE = '17'; // 'User does not have a stable rate loan in progress on this reserve'
string public constant VL_NO_VARIABLE_RATE_LOAN_IN_RESERVE = '18'; // 'User does not have a variable rate loan in progress on this reserve'
string public constant VL_UNDERLYING_BALANCE_NOT_GREATER_THAN_0 = '19'; // 'The underlying balance needs to be greater than 0'
string public constant VL_DEPOSIT_ALREADY_IN_USE = '20'; // 'User deposit is already being used as collateral'
string public constant LP_NOT_ENOUGH_STABLE_BORROW_BALANCE = '21'; // 'User does not have any stable rate loan for this reserve'
string public constant LP_INTEREST_RATE_REBALANCE_CONDITIONS_NOT_MET = '22'; // 'Interest rate rebalance conditions were not met'
string public constant LP_LIQUIDATION_CALL_FAILED = '23'; // 'Liquidation call failed'
string public constant LP_NOT_ENOUGH_LIQUIDITY_TO_BORROW = '24'; // 'There is not enough liquidity available to borrow'
string public constant LP_REQUESTED_AMOUNT_TOO_SMALL = '25'; // 'The requested amount is too small for a FlashLoan.'
string public constant LP_INCONSISTENT_PROTOCOL_ACTUAL_BALANCE = '26'; // 'The actual balance of the protocol is inconsistent'
string public constant LP_CALLER_NOT_LENDING_POOL_CONFIGURATOR = '27'; // 'The caller of the function is not the lending pool configurator'
string public constant LP_INCONSISTENT_FLASHLOAN_PARAMS = '28';
string public constant CT_CALLER_MUST_BE_LENDING_POOL = '29'; // 'The caller of this function must be a lending pool'
string public constant CT_CANNOT_GIVE_ALLOWANCE_TO_HIMSELF = '30'; // 'User cannot give allowance to himself'
string public constant CT_TRANSFER_AMOUNT_NOT_GT_0 = '31'; // 'Transferred amount needs to be greater than zero'
string public constant RL_RESERVE_ALREADY_INITIALIZED = '32'; // 'Reserve has already been initialized'
string public constant LPC_RESERVE_LIQUIDITY_NOT_0 = '34'; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_ATOKEN_POOL_ADDRESS = '35'; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_STABLE_DEBT_TOKEN_POOL_ADDRESS = '36'; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_VARIABLE_DEBT_TOKEN_POOL_ADDRESS = '37'; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_STABLE_DEBT_TOKEN_UNDERLYING_ADDRESS = '38'; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_VARIABLE_DEBT_TOKEN_UNDERLYING_ADDRESS = '39'; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_ADDRESSES_PROVIDER_ID = '40'; // 'The liquidity of the reserve needs to be 0'
string public constant LPC_INVALID_CONFIGURATION = '75'; // 'Invalid risk parameters for the reserve'
string public constant LPC_CALLER_NOT_EMERGENCY_ADMIN = '76'; // 'The caller must be the emergency admin'
string public constant LPAPR_PROVIDER_NOT_REGISTERED = '41'; // 'Provider is not registered'
string public constant LPCM_HEALTH_FACTOR_NOT_BELOW_THRESHOLD = '42'; // 'Health factor is not below the threshold'
string public constant LPCM_COLLATERAL_CANNOT_BE_LIQUIDATED = '43'; // 'The collateral chosen cannot be liquidated'
string public constant LPCM_SPECIFIED_CURRENCY_NOT_BORROWED_BY_USER = '44'; // 'User did not borrow the specified currency'
string public constant LPCM_NOT_ENOUGH_LIQUIDITY_TO_LIQUIDATE = '45'; // "There isn't enough liquidity available to liquidate"
string public constant LPCM_NO_ERRORS = '46'; // 'No errors'
string public constant LP_INVALID_FLASHLOAN_MODE = '47'; //Invalid flashloan mode selected
string public constant MATH_MULTIPLICATION_OVERFLOW = '48';
string public constant MATH_ADDITION_OVERFLOW = '49';
string public constant MATH_DIVISION_BY_ZERO = '50';
string public constant RL_LIQUIDITY_INDEX_OVERFLOW = '51'; // Liquidity index overflows uint128
string public constant RL_VARIABLE_BORROW_INDEX_OVERFLOW = '52'; // Variable borrow index overflows uint128
string public constant RL_LIQUIDITY_RATE_OVERFLOW = '53'; // Liquidity rate overflows uint128
string public constant RL_VARIABLE_BORROW_RATE_OVERFLOW = '54'; // Variable borrow rate overflows uint128
string public constant RL_STABLE_BORROW_RATE_OVERFLOW = '55'; // Stable borrow rate overflows uint128
string public constant CT_INVALID_MINT_AMOUNT = '56'; //invalid amount to mint
string public constant LP_FAILED_REPAY_WITH_COLLATERAL = '57';
string public constant CT_INVALID_BURN_AMOUNT = '58'; //invalid amount to burn
string public constant LP_FAILED_COLLATERAL_SWAP = '60';
string public constant LP_INVALID_EQUAL_ASSETS_TO_SWAP = '61';
string public constant LP_REENTRANCY_NOT_ALLOWED = '62';
string public constant LP_CALLER_MUST_BE_AN_ATOKEN = '63';
string public constant LP_IS_PAUSED = '64'; // 'Pool is paused'
string public constant LP_NO_MORE_RESERVES_ALLOWED = '65';
string public constant LP_INVALID_FLASH_LOAN_EXECUTOR_RETURN = '66';
string public constant RC_INVALID_LTV = '67';
string public constant RC_INVALID_LIQ_THRESHOLD = '68';
string public constant RC_INVALID_LIQ_BONUS = '69';
string public constant RC_INVALID_DECIMALS = '70';
string public constant RC_INVALID_RESERVE_FACTOR = '71';
string public constant LPAPR_INVALID_ADDRESSES_PROVIDER_ID = '72';
string public constant VL_INCONSISTENT_FLASHLOAN_PARAMS = '73';
string public constant LP_INCONSISTENT_PARAMS_LENGTH = '74';
string public constant UL_INVALID_INDEX = '77';
string public constant LP_NOT_CONTRACT = '78';
string public constant SDT_STABLE_DEBT_OVERFLOW = '79';
string public constant SDT_BURN_EXCEEDS_BALANCE = '80';
enum CollateralManagerErrors {
NO_ERROR,
NO_COLLATERAL_AVAILABLE,
COLLATERAL_CANNOT_BE_LIQUIDATED,
CURRRENCY_NOT_BORROWED,
HEALTH_FACTOR_ABOVE_THRESHOLD,
NOT_ENOUGH_LIQUIDITY,
NO_ACTIVE_RESERVE,
HEALTH_FACTOR_LOWER_THAN_LIQUIDATION_THRESHOLD,
INVALID_EQUAL_ASSETS_TO_SWAP,
FROZEN_RESERVE
}
}
// File src/external/aave/WadRayMath.sol
pragma solidity >=0.5.0;
/**
* @title WadRayMath library
* @author Aave
* @dev Provides mul and div function for wads (decimal numbers with 18 digits precision) and rays (decimals with 27 digits)
**/
library WadRayMath {
uint256 internal constant WAD = 1e18;
uint256 internal constant halfWAD = WAD / 2;
uint256 internal constant RAY = 1e27;
uint256 internal constant halfRAY = RAY / 2;
uint256 internal constant WAD_RAY_RATIO = 1e9;
/**
* @return One ray, 1e27
**/
function ray() internal pure returns (uint256) {
return RAY;
}
/**
* @return One wad, 1e18
**/
function wad() internal pure returns (uint256) {
return WAD;
}
/**
* @return Half ray, 1e27/2
**/
function halfRay() internal pure returns (uint256) {
return halfRAY;
}
/**
* @return Half ray, 1e18/2
**/
function halfWad() internal pure returns (uint256) {
return halfWAD;
}
/**
* @dev Multiplies two wad, rounding half up to the nearest wad
* @param a Wad
* @param b Wad
* @return The result of a*b, in wad
**/
function wadMul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0 || b == 0) {
return 0;
}
require(a <= (type(uint256).max - halfWAD) / b, Errors.MATH_MULTIPLICATION_OVERFLOW);
return (a * b + halfWAD) / WAD;
}
/**
* @dev Divides two wad, rounding half up to the nearest wad
* @param a Wad
* @param b Wad
* @return The result of a/b, in wad
**/
function wadDiv(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0, Errors.MATH_DIVISION_BY_ZERO);
uint256 halfB = b / 2;
require(a <= (type(uint256).max - halfB) / WAD, Errors.MATH_MULTIPLICATION_OVERFLOW);
return (a * WAD + halfB) / b;
}
/**
* @dev Multiplies two ray, rounding half up to the nearest ray
* @param a Ray
* @param b Ray
* @return The result of a*b, in ray
**/
function rayMul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0 || b == 0) {
return 0;
}
require(a <= (type(uint256).max - halfRAY) / b, Errors.MATH_MULTIPLICATION_OVERFLOW);
return (a * b + halfRAY) / RAY;
}
/**
* @dev Divides two ray, rounding half up to the nearest ray
* @param a Ray
* @param b Ray
* @return The result of a/b, in ray
**/
function rayDiv(uint256 a, uint256 b) internal pure returns (uint256) {
require(b != 0, Errors.MATH_DIVISION_BY_ZERO);
uint256 halfB = b / 2;
require(a <= (type(uint256).max - halfB) / RAY, Errors.MATH_MULTIPLICATION_OVERFLOW);
return (a * RAY + halfB) / b;
}
/**
* @dev Casts ray down to wad
* @param a Ray
* @return a casted to wad, rounded half up to the nearest wad
**/
function rayToWad(uint256 a) internal pure returns (uint256) {
uint256 halfRatio = WAD_RAY_RATIO / 2;
uint256 result = halfRatio + a;
require(result >= halfRatio, Errors.MATH_ADDITION_OVERFLOW);
return result / WAD_RAY_RATIO;
}
/**
* @dev Converts wad up to ray
* @param a Wad
* @return a converted in ray
**/
function wadToRay(uint256 a) internal pure returns (uint256) {
uint256 result = a * WAD_RAY_RATIO;
require(result / WAD_RAY_RATIO == a, Errors.MATH_MULTIPLICATION_OVERFLOW);
return result;
}
}
// File src/interfaces/IERC20Burnable.sol
pragma solidity >=0.5.0;
/// @title IERC20Burnable
/// @author Alchemix Finance
interface IERC20Burnable is IERC20 {
/// @notice Burns `amount` tokens from the balance of `msg.sender`.
///
/// @param amount The amount of tokens to burn.
///
/// @return If burning the tokens was successful.
function burn(uint256 amount) external returns (bool);
/// @notice Burns `amount` tokens from `owner`'s balance.
///
/// @param owner The address to burn tokens from.
/// @param amount The amount of tokens to burn.
///
/// @return If burning the tokens was successful.
function burnFrom(address owner, uint256 amount) external returns (bool);
}
// File src/interfaces/IERC20Mintable.sol
pragma solidity >=0.5.0;
/// @title IERC20Mintable
/// @author Alchemix Finance
interface IERC20Mintable is IERC20 {
/// @notice Mints `amount` tokens to `recipient`.
///
/// @param recipient The address which will receive the minted tokens.
/// @param amount The amount of tokens to mint.
function mint(address recipient, uint256 amount) external;
}
// File src/libraries/TokenUtils.sol
pragma solidity ^0.8.13;
/// @title TokenUtils
/// @author Alchemix Finance
library TokenUtils {
/// @notice An error used to indicate that a call to an ERC20 contract failed.
///
/// @param target The target address.
/// @param success If the call to the token was a success.
/// @param data The resulting data from the call. This is error data when the call was not a success. Otherwise,
/// this is malformed data when the call was a success.
error ERC20CallFailed(address target, bool success, bytes data);
/// @dev A safe function to get the decimals of an ERC20 token.
///
/// @dev Reverts with a {CallFailed} error if execution of the query fails or returns an unexpected value.
///
/// @param token The target token.
///
/// @return The amount of decimals of the token.
function expectDecimals(address token) internal view returns (uint8) {
(bool success, bytes memory data) = token.staticcall(
abi.encodeWithSelector(IERC20Metadata.decimals.selector)
);
if (token.code.length == 0 || !success || data.length < 32) {
revert ERC20CallFailed(token, success, data);
}
return abi.decode(data, (uint8));
}
/// @dev Gets the balance of tokens held by an account.
///
/// @dev Reverts with a {CallFailed} error if execution of the query fails or returns an unexpected value.
///
/// @param token The token to check the balance of.
/// @param account The address of the token holder.
///
/// @return The balance of the tokens held by an account.
function safeBalanceOf(address token, address account) internal view returns (uint256) {
(bool success, bytes memory data) = token.staticcall(
abi.encodeWithSelector(IERC20.balanceOf.selector, account)
);
if (token.code.length == 0 || !success || data.length < 32) {
revert ERC20CallFailed(token, success, data);
}
return abi.decode(data, (uint256));
}
/// @dev Transfers tokens to another address.
///
/// @dev Reverts with a {CallFailed} error if execution of the transfer failed or returns an unexpected value.
///
/// @param token The token to transfer.
/// @param recipient The address of the recipient.
/// @param amount The amount of tokens to transfer.
function safeTransfer(address token, address recipient, uint256 amount) internal {
(bool success, bytes memory data) = token.call(
abi.encodeWithSelector(IERC20.transfer.selector, recipient, amount)
);
if (token.code.length == 0 || !success || (data.length != 0 && !abi.decode(data, (bool)))) {
revert ERC20CallFailed(token, success, data);
}
}
/// @dev Approves tokens for the smart contract.
///
/// @dev Reverts with a {CallFailed} error if execution of the approval fails or returns an unexpected value.
///
/// @param token The token to approve.
/// @param spender The contract to spend the tokens.
/// @param value The amount of tokens to approve.
function safeApprove(address token, address spender, uint256 value) internal {
(bool success, bytes memory data) = token.call(
abi.encodeWithSelector(IERC20.approve.selector, spender, value)
);
if (token.code.length == 0 || !success || (data.length != 0 && !abi.decode(data, (bool)))) {
revert ERC20CallFailed(token, success, data);
}
}
/// @dev Transfer tokens from one address to another address.
///
/// @dev Reverts with a {CallFailed} error if execution of the transfer fails or returns an unexpected value.
///
/// @param token The token to transfer.
/// @param owner The address of the owner.
/// @param recipient The address of the recipient.
/// @param amount The amount of tokens to transfer.
function safeTransferFrom(address token, address owner, address recipient, uint256 amount) internal {
(bool success, bytes memory data) = token.call(
abi.encodeWithSelector(IERC20.transferFrom.selector, owner, recipient, amount)
);
if (token.code.length == 0 || !success || (data.length != 0 && !abi.decode(data, (bool)))) {
revert ERC20CallFailed(token, success, data);
}
}
/// @dev Mints tokens to an address.
///
/// @dev Reverts with a {CallFailed} error if execution of the mint fails or returns an unexpected value.
///
/// @param token The token to mint.
/// @param recipient The address of the recipient.
/// @param amount The amount of tokens to mint.
function safeMint(address token, address recipient, uint256 amount) internal {
(bool success, bytes memory data) = token.call(
abi.encodeWithSelector(IERC20Mintable.mint.selector, recipient, amount)
);
if (token.code.length == 0 || !success || (data.length != 0 && !abi.decode(data, (bool)))) {
revert ERC20CallFailed(token, success, data);
}
}
/// @dev Burns tokens.
///
/// Reverts with a `CallFailed` error if execution of the burn fails or returns an unexpected value.
///
/// @param token The token to burn.
/// @param amount The amount of tokens to burn.
function safeBurn(address token, uint256 amount) internal {
(bool success, bytes memory data) = token.call(
abi.encodeWithSelector(IERC20Burnable.burn.selector, amount)
);
if (token.code.length == 0 || !success || (data.length != 0 && !abi.decode(data, (bool)))) {
revert ERC20CallFailed(token, success, data);
}
}
/// @dev Burns tokens from its total supply.
///
/// @dev Reverts with a {CallFailed} error if execution of the burn fails or returns an unexpected value.
///
/// @param token The token to burn.
/// @param owner The owner of the tokens.
/// @param amount The amount of tokens to burn.
function safeBurnFrom(address token, address owner, uint256 amount) internal {
(bool success, bytes memory data) = token.call(
abi.encodeWithSelector(IERC20Burnable.burnFrom.selector, owner, amount)
);
if (token.code.length == 0 || !success || (data.length != 0 && !abi.decode(data, (bool)))) {
revert ERC20CallFailed(token, success, data);
}
}
}
// File src/base/Errors.sol
pragma solidity ^0.8.13;
/// @notice An error used to indicate that an action could not be completed because either the `msg.sender` or
/// `msg.origin` is not authorized.
error Unauthorized();
/// @notice An error used to indicate that an action could not be completed because the contract either already existed
/// or entered an illegal condition which is not recoverable from.
error IllegalState();
/// @notice An error used to indicate that an action could not be completed because of an illegal argument was passed
/// to the function.
error IllegalArgument();
// File src/external/aave/StaticATokenV3.sol
pragma solidity >=0.5.0;
pragma experimental ABIEncoderV2;
/**
* @title StaticAToken updated to work with alchemix rewardCollector
* @dev Wrapper token that allows to deposit tokens on the Aave protocol and receive
* a token which balance doesn't increase automatically, but uses an ever-increasing exchange rate
* - Only supporting deposits and withdrawals
* @author Aave
**/
contract StaticATokenV3 is ERC20 {
using SafeERC20 for IERC20;
using WadRayMath for uint256;
struct SignatureParams {
uint8 v;
bytes32 r;
bytes32 s;
}
bytes public constant EIP712_REVISION = bytes('1');
bytes32 internal constant EIP712_DOMAIN =
keccak256('EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)');
bytes32 public constant PERMIT_TYPEHASH =
keccak256('Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)');
bytes32 public constant METADEPOSIT_TYPEHASH =
keccak256(
'Deposit(address depositor,address recipient,uint256 value,uint16 referralCode,bool fromUnderlying,uint256 nonce,uint256 deadline)'
);
bytes32 public constant METAWITHDRAWAL_TYPEHASH =
keccak256(
'Withdraw(address owner,address recipient,uint256 staticAmount, uint256 dynamicAmount, bool toUnderlying, uint256 nonce,uint256 deadline)'
);
ILendingPool public immutable LENDING_POOL;
IRewardsController public immutable REWARDS_CONTROLLER;
IERC20 public immutable ATOKEN;
IERC20 public immutable ASSET;
address public admin;
address public pendingAdmin;
address public rewardCollector;
/// @dev owner => next valid nonce to submit with permit(), metaDeposit() and metaWithdraw()
/// We choose to have sequentiality on them for each user to avoid potentially dangerous/bad UX cases
mapping(address => uint256) public _nonces;
uint8 private _decimals;
constructor(
address lendingPool,
address rewardsController,
address aToken,
address _rewardCollector,
string memory wrappedTokenName,
string memory wrappedTokenSymbol
) ERC20(wrappedTokenName, wrappedTokenSymbol) {
admin = msg.sender;
LENDING_POOL = ILendingPool(lendingPool);
REWARDS_CONTROLLER = IRewardsController(rewardsController);
ATOKEN = IERC20(aToken);
rewardCollector = _rewardCollector;
IERC20 underlyingAsset = IERC20(IAToken(aToken).UNDERLYING_ASSET_ADDRESS());
ASSET = underlyingAsset;
TokenUtils.safeApprove(address(underlyingAsset), address(lendingPool), type(uint256).max);
_decimals = IERC20Metadata(aToken).decimals();
}
function decimals() public view override returns (uint8) {
return _decimals;
}
function claimRewards() public {
require(msg.sender == rewardCollector, 'Not rewardCollector');
address[] memory assets = new address[](1);
assets[0] = address(ATOKEN);
REWARDS_CONTROLLER.claimAllRewards(assets, msg.sender);
}
function setPendingAdmin(address newAdmin) external {
_onlyAdmin();
require(newAdmin != address(0), "0 address");
pendingAdmin = newAdmin;
}
function acceptAdmin() external {
require(msg.sender == pendingAdmin, "must be pending admin");
admin = pendingAdmin;
}
function setRewardCollector(address _rewardCollector) external {
_onlyAdmin();
rewardCollector = _rewardCollector;
}
/**
* @dev Deposits `ASSET` in the Aave protocol and mints static aTokens to msg.sender
* @param recipient The address that will receive the static aTokens
* @param amount The amount of underlying `ASSET` to deposit (e.g. deposit of 100 USDC)
* @param referralCode Code used to register the integrator originating the operation, for potential rewards.
* 0 if the action is executed directly by the user, without any middle-man
* @param fromUnderlying bool
* - `true` if the msg.sender comes with underlying tokens (e.g. USDC)
* - `false` if the msg.sender comes already with aTokens (e.g. aUSDC)
* @return uint256 The amount of StaticAToken minted, static balance
**/
function deposit(
address recipient,
uint256 amount,
uint16 referralCode,
bool fromUnderlying
) external returns (uint256) {
return _deposit(msg.sender, recipient, amount, referralCode, fromUnderlying);
}
/**
* @dev Burns `amount` of static aToken, with recipient receiving the corresponding amount of `ASSET`
* @param recipient The address that will receive the amount of `ASSET` withdrawn from the Aave protocol
* @param amount The amount to withdraw, in static balance of StaticAToken
* @param toUnderlying bool
* - `true` for the recipient to get underlying tokens (e.g. USDC)
* - `false` for the recipient to get aTokens (e.g. aUSDC)
* @return amountToBurn: StaticATokens burnt, static balance
* @return amountToWithdraw: underlying/aToken send to `recipient`, dynamic balance
**/
function withdraw(
address recipient,
uint256 amount,
bool toUnderlying
) external returns (uint256, uint256) {
return _withdraw(msg.sender, recipient, amount, 0, toUnderlying);
}
/**
* @dev Burns `amount` of static aToken, with recipient receiving the corresponding amount of `ASSET`
* @param recipient The address that will receive the amount of `ASSET` withdrawn from the Aave protocol
* @param amount The amount to withdraw, in dynamic balance of aToken/underlying asset
* @param toUnderlying bool
* - `true` for the recipient to get underlying tokens (e.g. USDC)
* - `false` for the recipient to get aTokens (e.g. aUSDC)
* @return amountToBurn: StaticATokens burnt, static balance
* @return amountToWithdraw: underlying/aToken send to `recipient`, dynamic balance
**/
function withdrawDynamicAmount(
address recipient,
uint256 amount,
bool toUnderlying
) external returns (uint256, uint256) {
return _withdraw(msg.sender, recipient, 0, amount, toUnderlying);
}
/**
* @dev Implements the permit function as for
* https://github.com/ethereum/EIPs/blob/8a34d644aacf0f9f8f00815307fd7dd5da07655f/EIPS/eip-2612.md
* @param owner The owner of the funds
* @param spender The spender
* @param value The amount
* @param deadline The deadline timestamp, type(uint256).max for max deadline
* @param v Signature param
* @param s Signature param
* @param r Signature param
* @param chainId Passing the chainId in order to be fork-compatible
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s,
uint256 chainId
) external {
require(owner != address(0), 'INVALID_OWNER');
//solium-disable-next-line
require(block.timestamp <= deadline, 'INVALID_EXPIRATION');
uint256 currentValidNonce = _nonces[owner];
bytes32 digest =
keccak256(
abi.encodePacked(
'\x19\x01',
getDomainSeparator(chainId),
keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, value, currentValidNonce, deadline))
)
);
require(owner == ecrecover(digest, v, r, s), 'INVALID_SIGNATURE');
_nonces[owner] = currentValidNonce + 1;
_approve(owner, spender, value);
}
/**
* @dev Allows to deposit on Aave via meta-transaction
* https://github.com/ethereum/EIPs/blob/8a34d644aacf0f9f8f00815307fd7dd5da07655f/EIPS/eip-2612.md
* @param depositor Address from which the funds to deposit are going to be pulled
* @param recipient Address that will receive the staticATokens, in the average case, same as the `depositor`
* @param value The amount to deposit
* @param referralCode Code used to register the integrator originating the operation, for potential rewards.
* 0 if the action is executed directly by the user, without any middle-man
* @param fromUnderlying bool
* - `true` if the msg.sender comes with underlying tokens (e.g. USDC)
* - `false` if the msg.sender comes already with aTokens (e.g. aUSDC)
* @param deadline The deadline timestamp, type(uint256).max for max deadline
* @param sigParams Signature params: v,r,s
* @param chainId Passing the chainId in order to be fork-compatible
* @return uint256 The amount of StaticAToken minted, static balance
*/
function metaDeposit(
address depositor,
address recipient,
uint256 value,
uint16 referralCode,
bool fromUnderlying,
uint256 deadline,
SignatureParams calldata sigParams,
uint256 chainId
) external returns (uint256) {
require(depositor != address(0), 'INVALID_DEPOSITOR');
//solium-disable-next-line
require(block.timestamp <= deadline, 'INVALID_EXPIRATION');
uint256 currentValidNonce = _nonces[depositor];
bytes32 digest =
keccak256(
abi.encodePacked(
'\x19\x01',
getDomainSeparator(chainId),
keccak256(
abi.encode(
METADEPOSIT_TYPEHASH,
depositor,
recipient,
value,
referralCode,
fromUnderlying,
currentValidNonce,
deadline
)
)
)
);
require(
depositor == ecrecover(digest, sigParams.v, sigParams.r, sigParams.s),
'INVALID_SIGNATURE'
);
_nonces[depositor] = currentValidNonce + 1;
return _deposit(depositor, recipient, value, referralCode, fromUnderlying);
}
/**
* @dev Allows to withdraw from Aave via meta-transaction
* https://github.com/ethereum/EIPs/blob/8a34d644aacf0f9f8f00815307fd7dd5da07655f/EIPS/eip-2612.md
* @param owner Address owning the staticATokens
* @param recipient Address that will receive the underlying withdrawn from Aave
* @param staticAmount The amount of staticAToken to withdraw. If > 0, `dynamicAmount` needs to be 0
* @param dynamicAmount The amount of underlying/aToken to withdraw. If > 0, `staticAmount` needs to be 0
* @param toUnderlying bool
* - `true` for the recipient to get underlying tokens (e.g. USDC)
* - `false` for the recipient to get aTokens (e.g. aUSDC)
* @param deadline The deadline timestamp, type(uint256).max for max deadline
* @param sigParams Signature params: v,r,s
* @param chainId Passing the chainId in order to be fork-compatible
* @return amountToBurn: StaticATokens burnt, static balance
* @return amountToWithdraw: underlying/aToken send to `recipient`, dynamic balance
*/
function metaWithdraw(
address owner,
address recipient,
uint256 staticAmount,
uint256 dynamicAmount,
bool toUnderlying,
uint256 deadline,
SignatureParams calldata sigParams,
uint256 chainId
) external returns (uint256, uint256) {
require(owner != address(0), 'INVALID_DEPOSITOR');
//solium-disable-next-line
require(block.timestamp <= deadline, 'INVALID_EXPIRATION');
uint256 currentValidNonce = _nonces[owner];
bytes32 digest =
keccak256(
abi.encodePacked(
'\x19\x01',
getDomainSeparator(chainId),
keccak256(
abi.encode(
METAWITHDRAWAL_TYPEHASH,
owner,
recipient,
staticAmount,
dynamicAmount,
toUnderlying,
currentValidNonce,
deadline
)
)
)
);
require(owner == ecrecover(digest, sigParams.v, sigParams.r, sigParams.s), 'INVALID_SIGNATURE');
_nonces[owner] = currentValidNonce + 1;
return _withdraw(owner, recipient, staticAmount, dynamicAmount, toUnderlying);
}
/**
* @dev Utility method to get the current aToken balance of an user, from his staticAToken balance
* @param account The address of the user
* @return uint256 The aToken balance
**/
function dynamicBalanceOf(address account) external view returns (uint256) {
return staticToDynamicAmount(balanceOf(account));
}
/**
* @dev Converts a static amount (scaled balance on aToken) to the aToken/underlying value,
* using the current liquidity index on Aave
* @param amount The amount to convert from
* @return uint256 The dynamic amount
**/
function staticToDynamicAmount(uint256 amount) public view returns (uint256) {
return amount.rayMul(rate());
}
/**
* @dev Converts an aToken or underlying amount to the what it is denominated on the aToken as
* scaled balance, function of the principal and the liquidity index
* @param amount The amount to convert from
* @return uint256 The static (scaled) amount
**/
function dynamicToStaticAmount(uint256 amount) public view returns (uint256) {
return amount.rayDiv(rate());
}
/**
* @dev Returns the Aave liquidity index of the underlying aToken, denominated rate here
* as it can be considered as an ever-increasing exchange rate
* @return bytes32 The domain separator
**/
function rate() public view returns (uint256) {
return LENDING_POOL.getReserveNormalizedIncome(address(ASSET));
}
/**
* @dev Function to return a dynamic domain separator, in order to be compatible with forks changing chainId
* @param chainId The chain id
* @return bytes32 The domain separator
**/
function getDomainSeparator(uint256 chainId) public view returns (bytes32) {
return
keccak256(
abi.encode(
EIP712_DOMAIN,
keccak256(bytes(name())),
keccak256(EIP712_REVISION),
chainId,
address(this)
)
);
}
/// @dev Checks that the `msg.sender` is the administrator.
///
/// @dev `msg.sender` must be the administrator or this call will revert with an {Unauthorized} error.
function _onlyAdmin() internal view {
if (msg.sender != admin) {
revert Unauthorized();
}
}
function _deposit(
address depositor,
address recipient,
uint256 amount,
uint16 referralCode,
bool fromUnderlying
) internal returns (uint256) {
require(recipient != address(0), 'INVALID_RECIPIENT');
if (fromUnderlying) {
ASSET.safeTransferFrom(depositor, address(this), amount);
LENDING_POOL.deposit(address(ASSET), amount, address(this), referralCode);
} else {
ATOKEN.safeTransferFrom(depositor, address(this), amount);
}
uint256 amountToMint = dynamicToStaticAmount(amount);
_mint(recipient, amountToMint);
return amountToMint;
}
function _withdraw(
address owner,
address recipient,
uint256 staticAmount,
uint256 dynamicAmount,
bool toUnderlying
) internal returns (uint256, uint256) {
require(recipient != address(0), 'INVALID_RECIPIENT');
require(staticAmount == 0 || dynamicAmount == 0, 'ONLY_ONE_AMOUNT_FORMAT_ALLOWED');
uint256 userBalance = balanceOf(owner);
uint256 amountToWithdraw;
uint256 amountToBurn;
uint256 currentRate = rate();
if (staticAmount > 0) {
amountToBurn = (staticAmount > userBalance) ? userBalance : staticAmount;
amountToWithdraw = (staticAmount > userBalance)
? _staticToDynamicAmount(userBalance, currentRate)
: _staticToDynamicAmount(staticAmount, currentRate);
} else {
uint256 dynamicUserBalance = _staticToDynamicAmount(userBalance, currentRate);
amountToWithdraw = (dynamicAmount > dynamicUserBalance) ? dynamicUserBalance : dynamicAmount;
amountToBurn = _dynamicToStaticAmount(amountToWithdraw, currentRate);
}
_burn(owner, amountToBurn);
if (toUnderlying) {
LENDING_POOL.withdraw(address(ASSET), amountToWithdraw, recipient);
} else {
ATOKEN.safeTransfer(recipient, amountToWithdraw);
}
return (amountToBurn, amountToWithdraw);
}
function _dynamicToStaticAmount(uint256 amount, uint256 rate) internal pure returns (uint256) {
return amount.rayDiv(rate);
}
function _staticToDynamicAmount(uint256 amount, uint256 rate) internal pure returns (uint256) {
return amount.rayMul(rate);
}
}{
"compilationTarget": {
"StaticATokenV3.sol": "StaticATokenV3"
},
"evmVersion": "london",
"libraries": {},
"metadata": {
"bytecodeHash": "ipfs"
},
"optimizer": {
"enabled": true,
"runs": 200
},
"remappings": []
}[{"inputs":[{"internalType":"address","name":"lendingPool","type":"address"},{"internalType":"address","name":"rewardsController","type":"address"},{"internalType":"address","name":"aToken","type":"address"},{"internalType":"address","name":"_rewardCollector","type":"address"},{"internalType":"string","name":"wrappedTokenName","type":"string"},{"internalType":"string","name":"wrappedTokenSymbol","type":"string"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bool","name":"success","type":"bool"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"ERC20CallFailed","type":"error"},{"inputs":[],"name":"Unauthorized","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[],"name":"ASSET","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"ATOKEN","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"EIP712_REVISION","outputs":[{"internalType":"bytes","name":"","type":"bytes"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"LENDING_POOL","outputs":[{"internalType":"contract ILendingPool","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"METADEPOSIT_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"METAWITHDRAWAL_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"PERMIT_TYPEHASH","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"REWARDS_CONTROLLER","outputs":[{"internalType":"contract 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