Contract Address Details

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;

import {DebtTokenBase} from "./base/DebtTokenBase.sol";
import {MathUtils} from "../libraries/math/MathUtils.sol";
import {WadRayMath} from "../libraries/math/WadRayMath.sol";
import {IStableDebtToken} from "../../interfaces/IStableDebtToken.sol";
import {ILendingPool} from "../../interfaces/ILendingPool.sol";
import {IPhiatIncentivesController} from "../../interfaces/IPhiatIncentivesController.sol";
import {Errors} from "../libraries/helpers/Errors.sol";
import {SafeMath} from "../../dependencies/openzeppelin/contracts/SafeMath.sol";

/**
 * @title StableDebtToken
 * @notice Implements a stable debt token to track the borrowing positions of users
 * at stable rate mode
 * @author Aave
 **/
contract StableDebtToken is IStableDebtToken, DebtTokenBase {
    using WadRayMath for uint256;
    using SafeMath for uint256;

    uint256 public constant DEBT_TOKEN_REVISION = 0x1;

    uint256 internal _avgStableRate;
    mapping(address => uint40) internal _timestamps;
    mapping(address => uint256) internal _usersStableRate;
    uint40 internal _totalSupplyTimestamp;

    /**
     * @dev Initializes the debt token.
     * @param pool The address of the lending pool where this aToken will be used
     * @param underlyingAsset The address of the underlying asset of this aToken (E.g. WETH for aWETH)
     * @param debtTokenDecimals The decimals of the debtToken, same as the underlying asset's
     * @param debtTokenName The name of the token
     * @param debtTokenSymbol The symbol of the token
     */
    function initialize(
        ILendingPool pool,
        address underlyingAsset,
        uint8 debtTokenDecimals,
        string memory debtTokenName,
        string memory debtTokenSymbol,
        bytes calldata params
    ) public override initializer {
        require(
            underlyingAsset != address(0),
            "Underlying asset can not be zero address"
        );

        _setName(debtTokenName);
        _setSymbol(debtTokenSymbol);
        _setDecimals(debtTokenDecimals);

        _pool = pool;
        _underlyingAsset = underlyingAsset;

        emit Initialized(
            underlyingAsset,
            address(pool),
            debtTokenDecimals,
            debtTokenName,
            debtTokenSymbol,
            params
        );
    }

    /**
     * @dev Gets the revision of the stable debt token implementation
     * @return The debt token implementation revision
     **/
    function getRevision() internal pure virtual override returns (uint256) {
        return DEBT_TOKEN_REVISION;
    }

    /**
     * @dev Returns the average stable rate across all the stable rate debt
     * @return the average stable rate
     **/
    function getAverageStableRate()
        external
        view
        virtual
        override
        returns (uint256)
    {
        return _avgStableRate;
    }

    /**
     * @dev Returns the timestamp of the last user action
     * @return The last update timestamp
     **/
    function getUserLastUpdated(address user)
        external
        view
        virtual
        override
        returns (uint40)
    {
        return _timestamps[user];
    }

    /**
     * @dev Returns the stable rate of the user
     * @param user The address of the user
     * @return The stable rate of user
     **/
    function getUserStableRate(address user)
        external
        view
        virtual
        override
        returns (uint256)
    {
        return _usersStableRate[user];
    }

    /**
     * @dev Calculates the current user debt balance
     * @return The accumulated debt of the user
     **/
    function balanceOf(address account)
        public
        view
        virtual
        override
        returns (uint256)
    {
        uint256 accountBalance = super.balanceOf(account);
        uint256 stableRate = _usersStableRate[account];
        if (accountBalance == 0) {
            return 0;
        }
        uint256 cumulatedInterest = MathUtils.calculateCompoundedInterest(
            stableRate,
            _timestamps[account]
        );
        return accountBalance.rayMul(cumulatedInterest);
    }

    struct MintLocalVars {
        uint256 previousSupply;
        uint256 nextSupply;
        uint256 amountInRay;
        uint256 newStableRate;
        uint256 currentAvgStableRate;
    }

    /**
     * @dev Mints debt token to the `onBehalfOf` address.
     * -  Only callable by the LendingPool
     * - The resulting rate is the weighted average between the rate of the new debt
     * and the rate of the previous debt
     * @param user The address receiving the borrowed underlying, being the delegatee in case
     * of credit delegate, or same as `onBehalfOf` otherwise
     * @param onBehalfOf The address receiving the debt tokens
     * @param amount The amount of debt tokens to mint
     * @param rate The rate of the debt being minted
     **/
    function mint(
        address user,
        address onBehalfOf,
        uint256 amount,
        uint256 rate
    ) external override onlyLendingPool returns (bool) {
        MintLocalVars memory vars;

        if (user != onBehalfOf) {
            _decreaseBorrowAllowance(onBehalfOf, user, amount);
        }

        (
            ,
            uint256 currentBalance,
            uint256 balanceIncrease
        ) = _calculateBalanceIncrease(onBehalfOf);

        vars.previousSupply = totalSupply();
        vars.currentAvgStableRate = _avgStableRate;
        vars.nextSupply = _totalSupply = vars.previousSupply.add(amount);

        vars.amountInRay = amount.wadToRay();

        vars.newStableRate = _usersStableRate[onBehalfOf]
            .rayMul(currentBalance.wadToRay())
            .add(vars.amountInRay.rayMul(rate))
            .rayDiv(currentBalance.add(amount).wadToRay());

        require(
            vars.newStableRate <= type(uint128).max,
            Errors.SDT_STABLE_DEBT_OVERFLOW
        );
        _usersStableRate[onBehalfOf] = vars.newStableRate;

        //solium-disable-next-line
        _totalSupplyTimestamp = _timestamps[onBehalfOf] = uint40(
            block.timestamp
        );

        // Calculates the updated average stable rate
        vars.currentAvgStableRate = _avgStableRate = vars
            .currentAvgStableRate
            .rayMul(vars.previousSupply.wadToRay())
            .add(rate.rayMul(vars.amountInRay))
            .rayDiv(vars.nextSupply.wadToRay());

        _mint(onBehalfOf, amount.add(balanceIncrease), vars.previousSupply);

        emit Transfer(address(0), onBehalfOf, amount);

        emit Mint(
            user,
            onBehalfOf,
            amount,
            currentBalance,
            balanceIncrease,
            vars.newStableRate,
            vars.currentAvgStableRate,
            vars.nextSupply
        );

        return currentBalance == 0;
    }

    /**
     * @dev Burns debt of `user`
     * @param user The address of the user getting his debt burned
     * @param amount The amount of debt tokens getting burned
     **/
    function burn(address user, uint256 amount)
        external
        override
        onlyLendingPool
    {
        (
            ,
            uint256 currentBalance,
            uint256 balanceIncrease
        ) = _calculateBalanceIncrease(user);

        uint256 previousSupply = totalSupply();
        uint256 newAvgStableRate = 0;
        uint256 nextSupply = 0;
        uint256 userStableRate = _usersStableRate[user];

        // Since the total supply and each single user debt accrue separately,
        // there might be accumulation errors so that the last borrower repaying
        // mght actually try to repay more than the available debt supply.
        // In this case we simply set the total supply and the avg stable rate to 0
        if (previousSupply <= amount) {
            _avgStableRate = 0;
            _totalSupply = 0;
        } else {
            nextSupply = _totalSupply = previousSupply.sub(amount);
            // exclude the rare case where first ever borrowing is stable and get 0 rate
            // if no one borrows in between, repay may trigger _totalSupply = 0 unintentionally
            if (_avgStableRate > 0 || userStableRate > 0) {
                uint256 firstTerm = _avgStableRate.rayMul(
                    previousSupply.wadToRay()
                );
                uint256 secondTerm = userStableRate.rayMul(amount.wadToRay());

                // For the same reason described above, when the last user is repaying it might
                // happen that user rate * user balance > avg rate * total supply. In that case,
                // we simply set the avg rate to 0
                if (secondTerm >= firstTerm) {
                    newAvgStableRate = _avgStableRate = _totalSupply = 0;
                } else {
                    newAvgStableRate = _avgStableRate = firstTerm
                        .sub(secondTerm)
                        .rayDiv(nextSupply.wadToRay());
                }
            }
        }

        if (amount == currentBalance) {
            _usersStableRate[user] = 0;
            _timestamps[user] = 0;
        } else {
            //solium-disable-next-line
            _timestamps[user] = uint40(block.timestamp);
        }
        //solium-disable-next-line
        _totalSupplyTimestamp = uint40(block.timestamp);

        if (balanceIncrease > amount) {
            uint256 amountToMint = balanceIncrease.sub(amount);
            _mint(user, amountToMint, previousSupply);
            emit Mint(
                user,
                user,
                amountToMint,
                currentBalance,
                balanceIncrease,
                userStableRate,
                newAvgStableRate,
                nextSupply
            );
        } else {
            uint256 amountToBurn = amount.sub(balanceIncrease);
            _burn(user, amountToBurn, previousSupply);
            emit Burn(
                user,
                amountToBurn,
                currentBalance,
                balanceIncrease,
                newAvgStableRate,
                nextSupply
            );
        }

        emit Transfer(user, address(0), amount);
    }

    /**
     * @dev Calculates the increase in balance since the last user interaction
     * @param user The address of the user for which the interest is being accumulated
     * @return The previous principal balance, the new principal balance and the balance increase
     **/
    function _calculateBalanceIncrease(address user)
        internal
        view
        returns (
            uint256,
            uint256,
            uint256
        )
    {
        uint256 previousPrincipalBalance = super.balanceOf(user);

        if (previousPrincipalBalance == 0) {
            return (0, 0, 0);
        }

        // Calculation of the accrued interest since the last accumulation
        uint256 balanceIncrease = balanceOf(user).sub(previousPrincipalBalance);

        return (
            previousPrincipalBalance,
            previousPrincipalBalance.add(balanceIncrease),
            balanceIncrease
        );
    }

    /**
     * @dev Returns the principal and total supply, the average borrow rate and the last supply update timestamp
     **/
    function getSupplyData()
        public
        view
        override
        returns (
            uint256,
            uint256,
            uint256,
            uint40
        )
    {
        uint256 avgRate = _avgStableRate;
        return (
            super.totalSupply(),
            _calcTotalSupply(avgRate),
            avgRate,
            _totalSupplyTimestamp
        );
    }

    /**
     * @dev Returns the the total supply and the average stable rate
     **/
    function getTotalSupplyAndAvgRate()
        public
        view
        override
        returns (uint256, uint256)
    {
        uint256 avgRate = _avgStableRate;
        return (_calcTotalSupply(avgRate), avgRate);
    }

    /**
     * @dev Returns the total supply
     **/
    function totalSupply() public view override returns (uint256) {
        return _calcTotalSupply(_avgStableRate);
    }

    /**
     * @dev Returns the timestamp at which the total supply was updated
     **/
    function getTotalSupplyLastUpdated() public view override returns (uint40) {
        return _totalSupplyTimestamp;
    }

    /**
     * @dev Returns the principal debt balance of the user from
     * @param user The user's address
     * @return The debt balance of the user since the last burn/mint action
     **/
    function principalBalanceOf(address user)
        external
        view
        virtual
        override
        returns (uint256)
    {
        return super.balanceOf(user);
    }

    /**
     * @dev Returns the address of the underlying asset of this aToken (E.g. WETH for aWETH)
     **/
    function UNDERLYING_ASSET_ADDRESS() public view returns (address) {
        return _underlyingAsset;
    }

    /**
     * @dev Returns the address of the lending pool where this aToken is used
     **/
    function POOL() public view returns (ILendingPool) {
        return _pool;
    }

    /**
     * @dev Returns the address of the incentives controller contract
     **/
    function getIncentivesController()
        external
        view
        override
        returns (IPhiatIncentivesController)
    {
        return _getIncentivesController();
    }

    /**
     * @dev For internal usage in the logic of the parent contracts
     **/
    function _getIncentivesController()
        internal
        view
        override
        returns (IPhiatIncentivesController)
    {
        return
            IPhiatIncentivesController(
                _pool.getAddressesProvider().getIncentivesController()
            );
    }

    /**
     * @dev For internal usage in the logic of the parent contracts
     **/
    function _getUnderlyingAssetAddress()
        internal
        view
        override
        returns (address)
    {
        return _underlyingAsset;
    }

    /**
     * @dev For internal usage in the logic of the parent contracts
     **/
    function _getLendingPool() internal view override returns (ILendingPool) {
        return _pool;
    }

    /**
     * @dev Calculates the total supply
     * @param avgRate The average rate at which the total supply increases
     * @return The debt balance of the user since the last burn/mint action
     **/
    function _calcTotalSupply(uint256 avgRate)
        internal
        view
        virtual
        returns (uint256)
    {
        uint256 principalSupply = super.totalSupply();

        if (principalSupply == 0) {
            return 0;
        }

        uint256 cumulatedInterest = MathUtils.calculateCompoundedInterest(
            avgRate,
            _totalSupplyTimestamp
        );

        return principalSupply.rayMul(cumulatedInterest);
    }

    /**
     * @dev Mints stable debt tokens to an user
     * @param account The account receiving the debt tokens
     * @param amount The amount being minted
     * @param oldTotalSupply the total supply before the minting event
     **/
    function _mint(
        address account,
        uint256 amount,
        uint256 oldTotalSupply
    ) internal {
        uint256 oldAccountBalance = _balances[account];
        _balances[account] = oldAccountBalance.add(amount);

        IPhiatIncentivesController incentivesController = _getIncentivesController();
        if (address(incentivesController) != address(0)) {
            incentivesController.handleAction(
                account,
                oldAccountBalance,
                oldTotalSupply
            );
        }
    }

    /**
     * @dev Burns stable debt tokens of an user
     * @param account The user getting his debt burned
     * @param amount The amount being burned
     * @param oldTotalSupply The total supply before the burning event
     **/
    function _burn(
        address account,
        uint256 amount,
        uint256 oldTotalSupply
    ) internal {
        uint256 oldAccountBalance = _balances[account];
        _balances[account] = oldAccountBalance.sub(
            amount,
            Errors.SDT_BURN_EXCEEDS_BALANCE
        );

        IPhiatIncentivesController incentivesController = _getIncentivesController();
        if (address(incentivesController) != address(0)) {
            incentivesController.handleAction(
                account,
                oldAccountBalance,
                oldTotalSupply
            );
        }
    }
}
        

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;

import {ILendingPool} from "./ILendingPool.sol";

/**
 * @title IInitializableDebtToken
 * @notice Interface for the initialize function common between debt tokens
 * @author Aave
 **/
interface IInitializableDebtToken {
    /**
     * @dev Emitted when a debt token is initialized
     * @param underlyingAsset The address of the underlying asset
     * @param pool The address of the associated lending pool
     * @param debtTokenDecimals the decimals of the debt token
     * @param debtTokenName the name of the debt token
     * @param debtTokenSymbol the symbol of the debt token
     * @param params A set of encoded parameters for additional initialization
     **/
    event Initialized(
        address indexed underlyingAsset,
        address indexed pool,
        uint8 debtTokenDecimals,
        string debtTokenName,
        string debtTokenSymbol,
        bytes params
    );

    /**
     * @dev Initializes the debt token.
     * @param pool The address of the lending pool where this aToken will be used
     * @param underlyingAsset The address of the underlying asset of this aToken (E.g. WETH for aWETH)
     * @param debtTokenDecimals The decimals of the debtToken, same as the underlying asset's
     * @param debtTokenName The name of the token
     * @param debtTokenSymbol The symbol of the token
     */
    function initialize(
        ILendingPool pool,
        address underlyingAsset,
        uint8 debtTokenDecimals,
        string memory debtTokenName,
        string memory debtTokenSymbol,
        bytes calldata params
    ) external;
}
          

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)

pragma solidity 0.7.6;

import "./IERC20.sol";

/**
 * @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);
}
          

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @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 `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, 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 `sender` to `recipient` 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 sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @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
    );
}
          

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <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 GSN 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 payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}
          

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;

library DataTypes {
    // 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 ReserveLimits {
        uint256 maxGlobalDepositSize;
        uint256 maxIndividualDepositSize;
        uint256 minIndividualDepositSize;
        uint256 maxGlobalBorrowSize;
        uint256 maxIndividualBorrowSize;
        uint256 maxBorrowBps;
    }

    struct UserConfigurationMap {
        uint256 data;
    }

    enum InterestRateMode {
        NONE,
        STABLE,
        VARIABLE
    }
}
          

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;

/**
 * @title LendingPoolAddressesProvider contract
 * @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
 * @author Aave
 **/
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 IncentivesControllerUpdated(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;

    function getIncentivesController() external view returns (address);

    function setIncentivesController(address lendingRateOracle) external;
}
          

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;

import {Context} from "../../dependencies/openzeppelin/contracts/Context.sol";
import {IERC20} from "../../dependencies/openzeppelin/contracts/IERC20.sol";
import {IERC20Metadata} from "../../dependencies/openzeppelin/contracts/IERC20Metadata.sol";
import {SafeMath} from "../../dependencies/openzeppelin/contracts/SafeMath.sol";
import {IPhiatIncentivesController} from "../../interfaces/IPhiatIncentivesController.sol";
import {ILendingPoolAddressesProvider} from "../../interfaces/ILendingPoolAddressesProvider.sol";
import {ILendingPool} from "../../interfaces/ILendingPool.sol";

/**
 * @title ERC20
 * @notice Basic ERC20 implementation
 * @author Aave, inspired by the Openzeppelin ERC20 implementation
 **/
abstract contract IncentivizedERC20 is Context, IERC20, IERC20Metadata {
    using SafeMath for uint256;

    mapping(address => uint256) internal _balances;

    mapping(address => mapping(address => uint256)) private _allowances;
    uint256 internal _totalSupply;
    string private _name;
    string private _symbol;
    uint8 private _decimals;

    ILendingPool internal _pool;
    address internal _underlyingAsset;

    constructor(
        string memory name,
        string memory symbol,
        uint8 decimals
    ) {
        _name = name;
        _symbol = symbol;
        _decimals = decimals;
    }

    /**
     * @return The name of the token
     **/
    function name() public view override returns (string memory) {
        return _name;
    }

    /**
     * @return The symbol of the token
     **/
    function symbol() public view override returns (string memory) {
        return _symbol;
    }

    /**
     * @return The decimals of the token
     **/
    function decimals() public view override returns (uint8) {
        return _decimals;
    }

    /**
     * @return The total supply of the token
     **/
    function totalSupply() public view virtual override returns (uint256) {
        return _totalSupply;
    }

    /**
     * @return The balance of the token
     **/
    function balanceOf(address account)
        public
        view
        virtual
        override
        returns (uint256)
    {
        return _balances[account];
    }

    /**
     * @return Abstract function implemented by the child aToken/debtToken.
     * Done this way in order to not break compatibility with previous versions of aTokens/debtTokens
     **/
    function _getIncentivesController()
        internal
        view
        virtual
        returns (IPhiatIncentivesController);

    /**
     * @dev Executes a transfer of tokens from _msgSender() to recipient
     * @param recipient The recipient of the tokens
     * @param amount The amount of tokens being transferred
     * @return `true` if the transfer succeeds, `false` otherwise
     **/
    function transfer(address recipient, uint256 amount)
        public
        virtual
        override
        returns (bool)
    {
        _transfer(_msgSender(), recipient, amount);
        emit Transfer(_msgSender(), recipient, amount);
        return true;
    }

    /**
     * @dev Returns the allowance of spender on the tokens owned by owner
     * @param owner The owner of the tokens
     * @param spender The user allowed to spend the owner's tokens
     * @return The amount of owner's tokens spender is allowed to spend
     **/
    function allowance(address owner, address spender)
        public
        view
        virtual
        override
        returns (uint256)
    {
        return _allowances[owner][spender];
    }

    /**
     * @dev Allows `spender` to spend the tokens owned by _msgSender()
     * @param spender The user allowed to spend _msgSender() tokens
     * @return `true`
     **/
    function approve(address spender, uint256 amount)
        public
        virtual
        override
        returns (bool)
    {
        _approve(_msgSender(), spender, amount);
        return true;
    }

    /**
     * @dev Executes a transfer of token from sender to recipient, if _msgSender() is allowed to do so
     * @param sender The owner of the tokens
     * @param recipient The recipient of the tokens
     * @param amount The amount of tokens being transferred
     * @return `true` if the transfer succeeds, `false` otherwise
     **/
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        _transfer(sender, recipient, amount);
        _approve(
            sender,
            _msgSender(),
            _allowances[sender][_msgSender()].sub(
                amount,
                "ERC20: transfer amount exceeds allowance"
            )
        );
        emit Transfer(sender, recipient, amount);
        return true;
    }

    /**
     * @dev Increases the allowance of spender to spend _msgSender() tokens
     * @param spender The user allowed to spend on behalf of _msgSender()
     * @param addedValue The amount being added to the allowance
     * @return `true`
     **/
    function increaseAllowance(address spender, uint256 addedValue)
        public
        virtual
        returns (bool)
    {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender].add(addedValue)
        );
        return true;
    }

    /**
     * @dev Decreases the allowance of spender to spend _msgSender() tokens
     * @param spender The user allowed to spend on behalf of _msgSender()
     * @param subtractedValue The amount being subtracted to the allowance
     * @return `true`
     **/
    function decreaseAllowance(address spender, uint256 subtractedValue)
        public
        virtual
        returns (bool)
    {
        _approve(
            _msgSender(),
            spender,
            _allowances[_msgSender()][spender].sub(
                subtractedValue,
                "ERC20: decreased allowance below zero"
            )
        );
        return true;
    }

    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal virtual {
        require(sender != address(0), "ERC20: transfer from the zero address");
        require(recipient != address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(sender, recipient, amount);

        uint256 oldSenderBalance = _balances[sender];
        _balances[sender] = oldSenderBalance.sub(
            amount,
            "ERC20: transfer amount exceeds balance"
        );
        uint256 oldRecipientBalance = _balances[recipient];
        _balances[recipient] = _balances[recipient].add(amount);

        if (address(_getIncentivesController()) != address(0)) {
            uint256 currentTotalSupply = _totalSupply;
            _getIncentivesController().handleAction(
                sender,
                oldSenderBalance,
                currentTotalSupply
            );
            if (sender != recipient) {
                _getIncentivesController().handleAction(
                    recipient,
                    oldRecipientBalance,
                    currentTotalSupply
                );
            }
        }
    }

    function _mint(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        uint256 oldTotalSupply = _totalSupply;
        _totalSupply = oldTotalSupply.add(amount);

        uint256 oldAccountBalance = _balances[account];
        _balances[account] = oldAccountBalance.add(amount);

        if (address(_getIncentivesController()) != address(0)) {
            _getIncentivesController().handleAction(
                account,
                oldAccountBalance,
                oldTotalSupply
            );
        }
    }

    function _burn(address account, uint256 amount) internal virtual {
        require(account != address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 oldTotalSupply = _totalSupply;
        _totalSupply = oldTotalSupply.sub(amount);

        uint256 oldAccountBalance = _balances[account];
        _balances[account] = oldAccountBalance.sub(
            amount,
            "ERC20: burn amount exceeds balance"
        );

        if (address(_getIncentivesController()) != address(0)) {
            _getIncentivesController().handleAction(
                account,
                oldAccountBalance,
                oldTotalSupply
            );
        }
    }

    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);
    }

    function _setName(string memory newName) internal {
        _name = newName;
    }

    function _setSymbol(string memory newSymbol) internal {
        _symbol = newSymbol;
    }

    function _setDecimals(uint8 newDecimals) internal {
        _decimals = newDecimals;
    }

    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}
          

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;

/**
 * @title VersionedInitializable
 *
 * @dev Helper contract to implement initializer functions. To use it, replace
 * the constructor with a function that has the `initializer` modifier.
 * WARNING: Unlike constructors, initializer functions must be manually
 * invoked. This applies both to deploying an Initializable contract, as well
 * as extending an Initializable contract via inheritance.
 * WARNING: When used with inheritance, manual care must be taken to not invoke
 * a parent initializer twice, or ensure that all initializers are idempotent,
 * because this is not dealt with automatically as with constructors.
 *
 * @author Aave, inspired by the OpenZeppelin Initializable contract
 */
abstract contract VersionedInitializable {
    /**
     * @dev Indicates that the contract has been initialized.
     */
    uint256 private lastInitializedRevision = 0;

    /**
     * @dev Indicates that the contract is in the process of being initialized.
     */
    bool private initializing;

    /**
     * @dev Modifier to use in the initializer function of a contract.
     */
    modifier initializer() {
        uint256 revision = getRevision();
        require(
            initializing ||
                isConstructor() ||
                revision > lastInitializedRevision,
            "Contract instance has already been initialized"
        );

        bool isTopLevelCall = !initializing;
        if (isTopLevelCall) {
            initializing = true;
            lastInitializedRevision = revision;
        }

        _;

        if (isTopLevelCall) {
            initializing = false;
        }
    }

    /**
     * @dev returns the revision number of the contract
     * Needs to be defined in the inherited class as a constant.
     **/
    function getRevision() internal pure virtual returns (uint256);

    /**
     * @dev Returns true if and only if the function is running in the constructor
     **/
    function isConstructor() private view returns (bool) {
        // extcodesize checks the size of the code stored in an address, and
        // address returns the current address. Since the code is still not
        // deployed when running a constructor, any checks on its code size will
        // yield zero, making it an effective way to detect if a contract is
        // under construction or not.
        uint256 cs;
        //solium-disable-next-line
        assembly {
            cs := extcodesize(address())
        }
        return cs == 0;
    }

    // Reserved storage space to allow for layout changes in the future.
    uint256[50] private ______gap;
}
          

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;

interface ICreditDelegationToken {
    event BorrowAllowanceDelegated(
        address indexed fromUser,
        address indexed toUser,
        address asset,
        uint256 amount
    );

    /**
     * @dev delegates borrowing power to a user on the specific debt token
     * @param delegatee the address receiving the delegated borrowing power
     * @param amount the maximum amount being delegated. Delegation will still
     * respect the liquidation constraints (even if delegated, a delegatee cannot
     * force a delegator HF to go below 1)
     **/
    function approveDelegation(address delegatee, uint256 amount) external;

    /**
     * @dev returns the borrow allowance of the user
     * @param fromUser The user to giving allowance
     * @param toUser The user to give allowance to
     * @return the current allowance of toUser
     **/
    function borrowAllowance(address fromUser, address toUser)
        external
        view
        returns (uint256);
}
          

// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryAdd(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        uint256 c = a + b;
        if (c < a) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the substraction of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function trySub(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        if (b > a) return (false, 0);
        return (true, a - b);
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, with an overflow flag.
     *
     * _Available since v3.4._
     */
    function tryMul(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) return (true, 0);
        uint256 c = a * b;
        if (c / a != b) return (false, 0);
        return (true, c);
    }

    /**
     * @dev Returns the division of two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryDiv(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        if (b == 0) return (false, 0);
        return (true, a / b);
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
     *
     * _Available since v3.4._
     */
    function tryMod(uint256 a, uint256 b)
        internal
        pure
        returns (bool, uint256)
    {
        if (b == 0) return (false, 0);
        return (true, a % b);
    }

    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b <= a, "SafeMath: subtraction overflow");
        return a - b;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) return 0;
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: division by zero");
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        require(b > 0, "SafeMath: modulo by zero");
        return a % b;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {trySub}.
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        return a - b;
    }

    /**
     * @dev Returns the integer division of two unsigned integers, reverting with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryDiv}.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a / b;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * reverting with custom message when dividing by zero.
     *
     * CAUTION: This function is deprecated because it requires allocating memory for the error
     * message unnecessarily. For custom revert reasons use {tryMod}.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        return a % b;
    }
}
          

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;

/**
 * @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
 *  - AVL = Additional 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";

    string public constant AVL_EXCEED_MAX_GLOBAL_DEPOSIT_SIZE = "81";
    string public constant AVL_EXCEED_MAX_INDIVIDUAL_DEPOSIT_SIZE = "82";
    string public constant AVL_BELOW_MIN_INDIVIDUAL_DEPOSIT_SIZE = "83";
    string public constant AVL_EXCEED_MAX_GLOBAL_BORROW_SIZE = "84";
    string public constant AVL_EXCEED_MAX_INDIVIDUAL_BORROW_SIZE = "85";
    string public constant AVL_EXCEED_BORROW_MAX_PERCENTAGE = "86";
    string public constant AVL_INVALID_BORROW_MAX_PERCENTAGE = "87";

    string public constant LP_USER_IS_BLACKLISTED = "88";
    string public constant LP_USER_NOT_ELIGIBLE_FOR_BLACKLIST = "89";

    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
    }
}
          

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;

interface IPhiatIncentivesController {
    event RewardsAccrued(address indexed user, uint256 amount);

    event RewardsClaimed(address indexed user, uint256 amount);

    /**
     * @dev add asset to accumulate rewards
     * @param asset The address of the reference asset of the distribution
     */
    function addAsset(address asset) external;

    /**
     * @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
        );

    /**
     * LEGACY **************************
     * @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 assets(address asset)
        external
        view
        returns (
            uint128,
            uint128,
            uint256
        );

    /**
     * @dev Called by the corresponding asset on any update that affects the rewards distribution
     * @param user The address of the user
     * @param userBalance The (old) balance of the user of the asset in the lending pool
     *      latest user balance (if different) can be retrieved from sender's balanceOf function
     * @param totalSupply The (old) total supply of the asset in the lending pool
     *      latest total supply (if different) can be retrieved from sender's totalSupply function
     **/
    function handleAction(
        address user,
        uint256 userBalance,
        uint256 totalSupply
    ) external;

    /**
     * @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 claim all user rewards
     * @param user the address of the user
     */
    function claimRewards(address user) external;

    /**
     * @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);

    /**
     * @dev Gets the distribution end timestamp of the emissions
     */
    function DISTRIBUTION_END() external view returns (uint256);
}
          

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;
pragma experimental ABIEncoderV2;

import {ILendingPoolAddressesProvider} from "./ILendingPoolAddressesProvider.sol";
import {DataTypes} from "../protocol/libraries/types/DataTypes.sol";

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 underlyng 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 liiquidator
     * @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 a borrower is blacklisted.
     * @param user The address of the borrower getting liquidated
     **/
    event Blacklist(address indexed user);

    /**
     * @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
    );

    function isBlacklisted(address user) external returns (bool);

    /**
     * @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
     *   - Send the value type(uint256).max in order to withdraw the whole aToken balance
     * @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 The final amount withdrawn
     **/
    function withdraw(
        address asset,
        uint256 amount,
        address to
    ) external returns (uint256);

    /**
     * @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
     * - Send the value type(uint256).max in order to repay the whole debt for `asset` on the specific `debtMode`
     * @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 The final amount repaid
     **/
    function repay(
        address asset,
        uint256 amount,
        uint256 rateMode,
        address onBehalfOf
    ) external returns (uint256);

    /**
     * @notice Repay all debts of the user and blacklist that user.
     * @param user Address of the user who will get his debt 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
     **/
    function repayAllAndBlacklist(address user) external;

    /**
     * @dev Allows a borrower to swap his debt between stable and variable mode, or viceversa
     * @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 smartcontracts 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 flashloan receiver contracts that must be kept into consideration.
     * For further details please visit https://developers.aave.com
     * @param receiverAddress The address of the contract receiving the funds, implementing the IFlashLoanReceiver interface
     * @param assets The addresses of the assets being flash-borrowed
     * @param amounts The amounts amounts being flash-borrowed
     * @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,
        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;

    function setReserveInterestRateStrategyAddress(
        address reserve,
        address rateStrategyAddress
    ) external;

    function setConfiguration(address reserve, uint256 configuration) external;

    function setLimits(
        address reserve,
        DataTypes.ReserveLimits calldata reserveLimits
    ) 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 (DataTypes.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 (DataTypes.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 (DataTypes.ReserveData memory);

    /**
     * @dev Returns the limits of the reserve
     * @param asset The address of the underlying asset of the reserve
     * @return The limits of the reserve
     **/
    function getReserveLimits(address asset)
        external
        view
        returns (DataTypes.ReserveLimits 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);

    function FLASHLOAN_PREMIUM_TOTAL() external view returns (uint256);
}
          

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;

import {IInitializableDebtToken} from "./IInitializableDebtToken.sol";
import {IPhiatIncentivesController} from "./IPhiatIncentivesController.sol";

/**
 * @title IStableDebtToken
 * @notice Defines the interface for the stable debt token
 * @dev It does not inherit from IERC20 to save in code size
 * @author Aave
 **/

interface IStableDebtToken is IInitializableDebtToken {
    /**
     * @dev Emitted when new stable debt is minted
     * @param user The address of the user who triggered the minting
     * @param onBehalfOf The recipient of stable debt tokens
     * @param amount The amount minted
     * @param currentBalance The current balance of the user
     * @param balanceIncrease The increase in balance since the last action of the user
     * @param newRate The rate of the debt after the minting
     * @param avgStableRate The new average stable rate after the minting
     * @param newTotalSupply The new total supply of the stable debt token after the action
     **/
    event Mint(
        address indexed user,
        address indexed onBehalfOf,
        uint256 amount,
        uint256 currentBalance,
        uint256 balanceIncrease,
        uint256 newRate,
        uint256 avgStableRate,
        uint256 newTotalSupply
    );

    /**
     * @dev Emitted when new stable debt is burned
     * @param user The address of the user
     * @param amount The amount being burned
     * @param currentBalance The current balance of the user
     * @param balanceIncrease The the increase in balance since the last action of the user
     * @param avgStableRate The new average stable rate after the burning
     * @param newTotalSupply The new total supply of the stable debt token after the action
     **/
    event Burn(
        address indexed user,
        uint256 amount,
        uint256 currentBalance,
        uint256 balanceIncrease,
        uint256 avgStableRate,
        uint256 newTotalSupply
    );

    /**
     * @dev Mints debt token to the `onBehalfOf` address.
     * - The resulting rate is the weighted average between the rate of the new debt
     * and the rate of the previous debt
     * @param user The address receiving the borrowed underlying, being the delegatee in case
     * of credit delegate, or same as `onBehalfOf` otherwise
     * @param onBehalfOf The address receiving the debt tokens
     * @param amount The amount of debt tokens to mint
     * @param rate The rate of the debt being minted
     **/
    function mint(
        address user,
        address onBehalfOf,
        uint256 amount,
        uint256 rate
    ) external returns (bool);

    /**
     * @dev Burns debt of `user`
     * - The resulting rate is the weighted average between the rate of the new debt
     * and the rate of the previous debt
     * @param user The address of the user getting his debt burned
     * @param amount The amount of debt tokens getting burned
     **/
    function burn(address user, uint256 amount) external;

    /**
     * @dev Returns the average rate of all the stable rate loans.
     * @return The average stable rate
     **/
    function getAverageStableRate() external view returns (uint256);

    /**
     * @dev Returns the stable rate of the user debt
     * @return The stable rate of the user
     **/
    function getUserStableRate(address user) external view returns (uint256);

    /**
     * @dev Returns the timestamp of the last update of the user
     * @return The timestamp
     **/
    function getUserLastUpdated(address user) external view returns (uint40);

    /**
     * @dev Returns the principal, the total supply and the average stable rate
     **/
    function getSupplyData()
        external
        view
        returns (
            uint256,
            uint256,
            uint256,
            uint40
        );

    /**
     * @dev Returns the timestamp of the last update of the total supply
     * @return The timestamp
     **/
    function getTotalSupplyLastUpdated() external view returns (uint40);

    /**
     * @dev Returns the total supply and the average stable rate
     **/
    function getTotalSupplyAndAvgRate()
        external
        view
        returns (uint256, uint256);

    /**
     * @dev Returns the principal debt balance of the user
     * @return The debt balance of the user since the last burn/mint action
     **/
    function principalBalanceOf(address user) external view returns (uint256);

    /**
     * @dev Returns the address of the incentives controller contract
     **/
    function getIncentivesController()
        external
        view
        returns (IPhiatIncentivesController);
}
          

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;

import {Errors} from "../helpers/Errors.sol";

/**
 * @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;
    }
}
          

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;

import {SafeMath} from "../../../dependencies/openzeppelin/contracts/SafeMath.sol";
import {WadRayMath} from "./WadRayMath.sol";

library MathUtils {
    using SafeMath for uint256;
    using WadRayMath for uint256;

    /// @dev Ignoring leap years
    uint256 internal constant SECONDS_PER_YEAR = 365 days;

    /**
     * @dev Function to calculate the interest accumulated using a linear interest rate formula
     * @param rate The interest rate, in ray
     * @param lastUpdateTimestamp The timestamp of the last update of the interest
     * @return The interest rate linearly accumulated during the timeDelta, in ray
     **/

    function calculateLinearInterest(uint256 rate, uint40 lastUpdateTimestamp)
        internal
        view
        returns (uint256)
    {
        //solium-disable-next-line
        uint256 timeDifference = block.timestamp.sub(
            uint256(lastUpdateTimestamp)
        );

        return
            (rate.mul(timeDifference) / SECONDS_PER_YEAR).add(WadRayMath.ray());
    }

    /**
     * @dev Function to calculate the interest using a compounded interest rate formula
     * To avoid expensive exponentiation, the calculation is performed using a binomial approximation:
     *
     *  (1+x)^n = 1+n*x+[n/2*(n-1)]*x^2+[n/6*(n-1)*(n-2)*x^3...
     *
     * The approximation slightly underpays liquidity providers and undercharges borrowers, with the advantage of great gas cost reductions
     * The whitepaper contains reference to the approximation and a table showing the margin of error per different time periods
     *
     * @param rate The interest rate, in ray
     * @param lastUpdateTimestamp The timestamp of the last update of the interest
     * @return The interest rate compounded during the timeDelta, in ray
     **/
    function calculateCompoundedInterest(
        uint256 rate,
        uint40 lastUpdateTimestamp,
        uint256 currentTimestamp
    ) internal pure returns (uint256) {
        //solium-disable-next-line
        uint256 exp = currentTimestamp.sub(uint256(lastUpdateTimestamp));

        if (exp == 0) {
            return WadRayMath.ray();
        }

        uint256 expMinusOne = exp - 1;

        uint256 expMinusTwo = exp > 2 ? exp - 2 : 0;

        uint256 ratePerSecond = rate / SECONDS_PER_YEAR;

        uint256 basePowerTwo = ratePerSecond.rayMul(ratePerSecond);
        uint256 basePowerThree = basePowerTwo.rayMul(ratePerSecond);

        uint256 secondTerm = exp.mul(expMinusOne).mul(basePowerTwo) / 2;
        uint256 thirdTerm = exp.mul(expMinusOne).mul(expMinusTwo).mul(
            basePowerThree
        ) / 6;

        return
            WadRayMath.ray().add(ratePerSecond.mul(exp)).add(secondTerm).add(
                thirdTerm
            );
    }

    /**
     * @dev Calculates the compounded interest between the timestamp of the last update and the current block timestamp
     * @param rate The interest rate (in ray)
     * @param lastUpdateTimestamp The timestamp from which the interest accumulation needs to be calculated
     **/
    function calculateCompoundedInterest(
        uint256 rate,
        uint40 lastUpdateTimestamp
    ) internal view returns (uint256) {
        return
            calculateCompoundedInterest(
                rate,
                lastUpdateTimestamp,
                block.timestamp
            );
    }
}
          

// SPDX-License-Identifier: agpl-3.0
pragma solidity 0.7.6;

import {ILendingPool} from "../../../interfaces/ILendingPool.sol";
import {ICreditDelegationToken} from "../../../interfaces/ICreditDelegationToken.sol";
import {VersionedInitializable} from "../../libraries/aave-upgradeability/VersionedInitializable.sol";
import {IncentivizedERC20} from "../IncentivizedERC20.sol";
import {Errors} from "../../libraries/helpers/Errors.sol";
import {SafeMath} from "../../../dependencies/openzeppelin/contracts/SafeMath.sol";

/**
 * @title DebtTokenBase
 * @notice Base contract for different types of debt tokens, like StableDebtToken or VariableDebtToken
 * @author Aave
 */

abstract contract DebtTokenBase is
    IncentivizedERC20("DEBTTOKEN_IMPL", "DEBTTOKEN_IMPL", 0),
    VersionedInitializable,
    ICreditDelegationToken
{
    using SafeMath for uint256;

    mapping(address => mapping(address => uint256)) internal _borrowAllowances;

    /**
     * @dev Only lending pool can call functions marked by this modifier
     **/
    modifier onlyLendingPool() {
        require(
            _msgSender() == address(_getLendingPool()),
            Errors.CT_CALLER_MUST_BE_LENDING_POOL
        );
        _;
    }

    /**
     * @dev delegates borrowing power to a user on the specific debt token
     * @param delegatee the address receiving the delegated borrowing power
     * @param amount the maximum amount being delegated. Delegation will still
     * respect the liquidation constraints (even if delegated, a delegatee cannot
     * force a delegator HF to go below 1)
     **/
    function approveDelegation(address delegatee, uint256 amount)
        external
        override
    {
        _borrowAllowances[_msgSender()][delegatee] = amount;
        emit BorrowAllowanceDelegated(
            _msgSender(),
            delegatee,
            _getUnderlyingAssetAddress(),
            amount
        );
    }

    /**
     * @dev returns the borrow allowance of the user
     * @param fromUser The user to giving allowance
     * @param toUser The user to give allowance to
     * @return the current allowance of toUser
     **/
    function borrowAllowance(address fromUser, address toUser)
        external
        view
        override
        returns (uint256)
    {
        return _borrowAllowances[fromUser][toUser];
    }

    /**
     * @dev Being non transferrable, the debt token does not implement any of the
     * standard ERC20 functions for transfer and allowance.
     **/
    function transfer(address recipient, uint256 amount)
        public
        virtual
        override
        returns (bool)
    {
        recipient;
        amount;
        revert("TRANSFER_NOT_SUPPORTED");
    }

    function allowance(address owner, address spender)
        public
        view
        virtual
        override
        returns (uint256)
    {
        owner;
        spender;
        revert("ALLOWANCE_NOT_SUPPORTED");
    }

    function approve(address spender, uint256 amount)
        public
        virtual
        override
        returns (bool)
    {
        spender;
        amount;
        revert("APPROVAL_NOT_SUPPORTED");
    }

    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) public virtual override returns (bool) {
        sender;
        recipient;
        amount;
        revert("TRANSFER_NOT_SUPPORTED");
    }

    function increaseAllowance(address spender, uint256 addedValue)
        public
        virtual
        override
        returns (bool)
    {
        spender;
        addedValue;
        revert("ALLOWANCE_NOT_SUPPORTED");
    }

    function decreaseAllowance(address spender, uint256 subtractedValue)
        public
        virtual
        override
        returns (bool)
    {
        spender;
        subtractedValue;
        revert("ALLOWANCE_NOT_SUPPORTED");
    }

    function _decreaseBorrowAllowance(
        address delegator,
        address delegatee,
        uint256 amount
    ) internal {
        uint256 newAllowance = _borrowAllowances[delegator][delegatee].sub(
            amount,
            Errors.BORROW_ALLOWANCE_NOT_ENOUGH
        );

        _borrowAllowances[delegator][delegatee] = newAllowance;

        emit BorrowAllowanceDelegated(
            delegator,
            delegatee,
            _getUnderlyingAssetAddress(),
            newAllowance
        );
    }

    function _getUnderlyingAssetAddress()
        internal
        view
        virtual
        returns (address);

    function _getLendingPool() internal view virtual returns (ILendingPool);
}