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// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

import { IRateSource } from './interfaces/IRateSource.sol';

import {
    VariableBorrowInterestRateStrategy,
    IPoolAddressesProvider
} from './VariableBorrowInterestRateStrategy.sol';

/**
 * @title  RateTargetKinkInterestRateStrategy
 * @notice Sets the kink interest rate as a fixed spread from a rate source.
 */
contract RateTargetKinkInterestRateStrategy is VariableBorrowInterestRateStrategy {

    IRateSource public immutable RATE_SOURCE;

    // Slope spread of the variable interest curve when usage ratio > 0 and <= OPTIMAL_USAGE_RATIO. Expressed in ray.
    int256 internal immutable _variableRateSlope1Spread;

    /**
     * @dev   Constructor.
     * @param provider                 The address of the PoolAddressesProvider contract.
     * @param rateSource               The address of the rate source contract.
     * @param optimalUsageRatio        The optimal usage ratio.
     * @param baseVariableBorrowRate   The base variable borrow rate.
     * @param variableRateSlope1Spread The spread between the rate source and the desired target kink rate.
     *                                 Note: This discounts the base variable borrow rate.
     * @param variableRateSlope2       The variable rate slope above optimal usage ratio.
     */
    constructor(
        IPoolAddressesProvider provider,
        address rateSource,
        uint256 optimalUsageRatio,
        uint256 baseVariableBorrowRate,
        int256  variableRateSlope1Spread,
        uint256 variableRateSlope2
    ) VariableBorrowInterestRateStrategy(
        provider,
        optimalUsageRatio,
        baseVariableBorrowRate,
        0,
        variableRateSlope2
    ) {
        RATE_SOURCE = IRateSource(rateSource);

        _variableRateSlope1Spread = variableRateSlope1Spread;
    }

    function _getVariableRateSlope1() internal override view returns (uint256) {
        // We assume all rates are below max int. This is a reasonable assumption because
        // otherwise the rates will be so high that the protocol will stop working
        int256 rate = int256(RATE_SOURCE.getAPR()) + _variableRateSlope1Spread - int256(_baseVariableBorrowRate);
        return rate > 0 ? uint256(rate) : 0;
    }

    function getVariableRateSlope1Spread() external view returns (int256) {
        return _variableRateSlope1Spread;
    }

}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity >=0.8.0;

interface IRateSource {
    function getAPR() external view returns (uint256);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.10;

import { IERC20 } from 'sparklend-v1-core/dependencies/openzeppelin/contracts/IERC20.sol';

import { IDefaultInterestRateStrategy } from 'sparklend-v1-core/interfaces/IDefaultInterestRateStrategy.sol';
import { IPoolAddressesProvider }       from 'sparklend-v1-core/interfaces/IPoolAddressesProvider.sol';
import { IReserveInterestRateStrategy } from 'sparklend-v1-core/interfaces/IReserveInterestRateStrategy.sol';

import { DataTypes }      from 'sparklend-v1-core/protocol/libraries/types/DataTypes.sol';
import { Errors }         from 'sparklend-v1-core/protocol/libraries/helpers/Errors.sol';
import { PercentageMath } from 'sparklend-v1-core/protocol/libraries/math/PercentageMath.sol';
import { WadRayMath }     from 'sparklend-v1-core/protocol/libraries/math/WadRayMath.sol';

/**
 * @title  VariableBorrowInterestRateStrategy contract
 * @author Aave
 * @notice Implements the calculation of the interest rates depending on the reserve state.
 * @dev    The model of interest rate is based on 2 slopes, one before the `OPTIMAL_USAGE_RATIO`
 *         point of usage and another from that one to 100%.
 *         - An instance of this same contract, can't be used across different Aave markets,
 *           due to the caching of the PoolAddressesProvider.
 *         - NOTE: This is a modified version of DefaultReserveInterestRateStrategy with
 *                 the stable borrow feature disabled.
 */
contract VariableBorrowInterestRateStrategy is IDefaultInterestRateStrategy {

    using WadRayMath     for uint256;
    using PercentageMath for uint256;

    /**********************************************************************************************/
    /*** Declarations and Constructor                                                           ***/
    /**********************************************************************************************/

    // Unused functionality, so initialized to 100% and 0% respectively.
    uint256 public override constant MAX_EXCESS_STABLE_TO_TOTAL_DEBT_RATIO = WadRayMath.RAY;
    uint256 public override constant OPTIMAL_STABLE_TO_TOTAL_DEBT_RATIO    = 0;

    uint256 public override immutable MAX_EXCESS_USAGE_RATIO;
    uint256 public override immutable OPTIMAL_USAGE_RATIO;

    IPoolAddressesProvider public override immutable ADDRESSES_PROVIDER;

    // Base variable borrow rate when usage rate = 0.
    // Expressed in ray.
    uint256 internal immutable _baseVariableBorrowRate;

    // Slope of the variable interest curve when usage ratio > 0 and <= OPTIMAL_USAGE_RATIO.
    // Expressed in ray.
    uint256 internal immutable _variableRateSlope1;

    // Slope of the variable interest curve when usage ratio > OPTIMAL_USAGE_RATIO.
    // Expressed in ray.
    uint256 internal immutable _variableRateSlope2;

    /**
     * @dev   Constructor.
     * @param provider               The address of the PoolAddressesProvider contract.
     * @param optimalUsageRatio      The optimal usage ratio.
     * @param baseVariableBorrowRate The base variable borrow rate.
     * @param variableRateSlope1     The variable rate slope below optimal usage ratio.
     * @param variableRateSlope2     The variable rate slope above optimal usage ratio.
     */
    constructor(
        IPoolAddressesProvider provider,
        uint256 optimalUsageRatio,
        uint256 baseVariableBorrowRate,
        uint256 variableRateSlope1,
        uint256 variableRateSlope2
    ) {
        require(WadRayMath.RAY >= optimalUsageRatio, Errors.INVALID_OPTIMAL_USAGE_RATIO);

        OPTIMAL_USAGE_RATIO    = optimalUsageRatio;
        MAX_EXCESS_USAGE_RATIO = WadRayMath.RAY - optimalUsageRatio;
        ADDRESSES_PROVIDER     = provider;

        _baseVariableBorrowRate = baseVariableBorrowRate;
        _variableRateSlope1     = variableRateSlope1;
        _variableRateSlope2     = variableRateSlope2;
    }

    /**********************************************************************************************/
    /*** Internal Virtual Functions (Override for different functionality)                      ***/
    /**********************************************************************************************/

    function _getBaseVariableBorrowRate() internal virtual view returns (uint256) {
        return _baseVariableBorrowRate;
    }

    function _getVariableRateSlope1() internal virtual view returns (uint256) {
        return _variableRateSlope1;
    }

    function _getVariableRateSlope2() internal virtual view returns (uint256) {
        return _variableRateSlope2;
    }

    /**********************************************************************************************/
    /*** Standard Interface Getter Functions                                                    ***/
    /**********************************************************************************************/

    function getBaseStableBorrowRate() external override view returns (uint256) {
        return _getVariableRateSlope1();
    }

    function getBaseVariableBorrowRate() external override view returns (uint256) {
        return _getBaseVariableBorrowRate();
    }

    function getVariableRateSlope1() external override view returns (uint256) {
        return _getVariableRateSlope1();
    }

    function getVariableRateSlope2() external override view returns (uint256) {
        return _getVariableRateSlope2();
    }

    function getStableRateSlope1() external override pure returns (uint256) {
        return 0;
    }

    function getStableRateSlope2() external override pure returns (uint256) {
        return 0;
    }

    function getStableRateExcessOffset() external override pure returns (uint256) {
        return 0;
    }

    function getMaxVariableBorrowRate() external view override returns (uint256) {
        return _getBaseVariableBorrowRate() + _getVariableRateSlope1() + _getVariableRateSlope2();
    }

    /**********************************************************************************************/
    /*** Interest Calculation Function                                                          ***/
    /**********************************************************************************************/

    struct CalcInterestRatesLocalVars {
        uint256 availableLiquidity;
        uint256 currentVariableBorrowRate;
        uint256 currentLiquidityRate;
        uint256 borrowUsageRatio;
        uint256 supplyUsageRatio;
        uint256 availableLiquidityPlusDebt;
    }

    function calculateInterestRates(
        DataTypes.CalculateInterestRatesParams memory params
    )
        external view override
        returns (uint256 liquidityRate, uint256 stableBorrowRate, uint256 variableBorrowRate)
    {
        CalcInterestRatesLocalVars memory vars;

        // 1. Set the current variable borrow rate to the base rate.

        vars.currentLiquidityRate      = 0;
        vars.currentVariableBorrowRate = _getBaseVariableBorrowRate();

        // 2. Calculate the borrow and supply usage ratios.

        if (params.totalVariableDebt != 0) {
            // Calculate the total resulting cash in the reserve after the call is complete.
            vars.availableLiquidity =
                IERC20(params.reserve).balanceOf(params.aToken) +
                params.liquidityAdded -
                params.liquidityTaken;

            // Calculate the total value of the asset in the reserve (cash + debt).
            vars.availableLiquidityPlusDebt = vars.availableLiquidity + params.totalVariableDebt;

            // Calculate the borrowUsageRatio (debt / total value).
            vars.borrowUsageRatio = params.totalVariableDebt.rayDiv(vars.availableLiquidityPlusDebt);

            // Calculate the supplyUsageRatio (debt / total value + unbacked).
            // NOTE: The supplyUsageRatio will almost always equal the borrowUsageRatio, except
            //       when unbacked aTokens are minted.
            vars.supplyUsageRatio
                = params.totalVariableDebt.rayDiv(vars.availableLiquidityPlusDebt + params.unbacked);
        }

        // 3. Calculate the variable borrow rate, using the 2-slope model.

        if (vars.borrowUsageRatio > OPTIMAL_USAGE_RATIO) {
            // excessBorrowUsageRatio = (borrowRatio - optimalRatio) / (1 - optimalRatio)
            uint256 excessBorrowUsageRatio
                = (vars.borrowUsageRatio - OPTIMAL_USAGE_RATIO).rayDiv(MAX_EXCESS_USAGE_RATIO);

            vars.currentVariableBorrowRate +=
                _getVariableRateSlope1() +
                _getVariableRateSlope2().rayMul(excessBorrowUsageRatio);
        } else {
            vars.currentVariableBorrowRate +=
                _getVariableRateSlope1().rayMul(vars.borrowUsageRatio).rayDiv(OPTIMAL_USAGE_RATIO);
        }

        // 4. Calculate the liquidity rate by multiplying the current variable borrow rate by
        //    the supply usage ratio and multiplying by (100% - the protocol's reserve factor).
        //    This yields the amount that the lenders are earning based on the interest paid by
        //    the borrowers, before the protocol's cut, taking into account idle capital.

        if (params.totalVariableDebt != 0) {
            vars.currentLiquidityRate =
                vars.currentVariableBorrowRate
                .rayMul(vars.supplyUsageRatio)
                .percentMul(PercentageMath.PERCENTAGE_FACTOR - params.reserveFactor);
        }

        return (
            vars.currentLiquidityRate,
            0,
            vars.currentVariableBorrowRate
        );
    }

}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^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: AGPL-3.0
pragma solidity ^0.8.0;

import {IReserveInterestRateStrategy} from './IReserveInterestRateStrategy.sol';
import {IPoolAddressesProvider} from './IPoolAddressesProvider.sol';

/**
 * @title IDefaultInterestRateStrategy
 * @author Aave
 * @notice Defines the basic interface of the DefaultReserveInterestRateStrategy
 */
interface IDefaultInterestRateStrategy is IReserveInterestRateStrategy {
  /**
   * @notice Returns the usage ratio at which the pool aims to obtain most competitive borrow rates.
   * @return The optimal usage ratio, expressed in ray.
   */
  function OPTIMAL_USAGE_RATIO() external view returns (uint256);

  /**
   * @notice Returns the optimal stable to total debt ratio of the reserve.
   * @return The optimal stable to total debt ratio, expressed in ray.
   */
  function OPTIMAL_STABLE_TO_TOTAL_DEBT_RATIO() external view returns (uint256);

  /**
   * @notice Returns the excess usage ratio above the optimal.
   * @dev It's always equal to 1-optimal usage ratio (added as constant for gas optimizations)
   * @return The max excess usage ratio, expressed in ray.
   */
  function MAX_EXCESS_USAGE_RATIO() external view returns (uint256);

  /**
   * @notice Returns the excess stable debt ratio above the optimal.
   * @dev It's always equal to 1-optimal stable to total debt ratio (added as constant for gas optimizations)
   * @return The max excess stable to total debt ratio, expressed in ray.
   */
  function MAX_EXCESS_STABLE_TO_TOTAL_DEBT_RATIO() external view returns (uint256);

  /**
   * @notice Returns the address of the PoolAddressesProvider
   * @return The address of the PoolAddressesProvider contract
   */
  function ADDRESSES_PROVIDER() external view returns (IPoolAddressesProvider);

  /**
   * @notice Returns the variable rate slope below optimal usage ratio
   * @dev It's the variable rate when usage ratio > 0 and <= OPTIMAL_USAGE_RATIO
   * @return The variable rate slope, expressed in ray
   */
  function getVariableRateSlope1() external view returns (uint256);

  /**
   * @notice Returns the variable rate slope above optimal usage ratio
   * @dev It's the variable rate when usage ratio > OPTIMAL_USAGE_RATIO
   * @return The variable rate slope, expressed in ray
   */
  function getVariableRateSlope2() external view returns (uint256);

  /**
   * @notice Returns the stable rate slope below optimal usage ratio
   * @dev It's the stable rate when usage ratio > 0 and <= OPTIMAL_USAGE_RATIO
   * @return The stable rate slope, expressed in ray
   */
  function getStableRateSlope1() external view returns (uint256);

  /**
   * @notice Returns the stable rate slope above optimal usage ratio
   * @dev It's the variable rate when usage ratio > OPTIMAL_USAGE_RATIO
   * @return The stable rate slope, expressed in ray
   */
  function getStableRateSlope2() external view returns (uint256);

  /**
   * @notice Returns the stable rate excess offset
   * @dev It's an additional premium applied to the stable when stable debt > OPTIMAL_STABLE_TO_TOTAL_DEBT_RATIO
   * @return The stable rate excess offset, expressed in ray
   */
  function getStableRateExcessOffset() external view returns (uint256);

  /**
   * @notice Returns the base stable borrow rate
   * @return The base stable borrow rate, expressed in ray
   */
  function getBaseStableBorrowRate() external view returns (uint256);

  /**
   * @notice Returns the base variable borrow rate
   * @return The base variable borrow rate, expressed in ray
   */
  function getBaseVariableBorrowRate() external view returns (uint256);

  /**
   * @notice Returns the maximum variable borrow rate
   * @return The maximum variable borrow rate, expressed in ray
   */
  function getMaxVariableBorrowRate() external view returns (uint256);
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

/**
 * @title IPoolAddressesProvider
 * @author Aave
 * @notice Defines the basic interface for a Pool Addresses Provider.
 */
interface IPoolAddressesProvider {
  /**
   * @dev Emitted when the market identifier is updated.
   * @param oldMarketId The old id of the market
   * @param newMarketId The new id of the market
   */
  event MarketIdSet(string indexed oldMarketId, string indexed newMarketId);

  /**
   * @dev Emitted when the pool is updated.
   * @param oldAddress The old address of the Pool
   * @param newAddress The new address of the Pool
   */
  event PoolUpdated(address indexed oldAddress, address indexed newAddress);

  /**
   * @dev Emitted when the pool configurator is updated.
   * @param oldAddress The old address of the PoolConfigurator
   * @param newAddress The new address of the PoolConfigurator
   */
  event PoolConfiguratorUpdated(address indexed oldAddress, address indexed newAddress);

  /**
   * @dev Emitted when the price oracle is updated.
   * @param oldAddress The old address of the PriceOracle
   * @param newAddress The new address of the PriceOracle
   */
  event PriceOracleUpdated(address indexed oldAddress, address indexed newAddress);

  /**
   * @dev Emitted when the ACL manager is updated.
   * @param oldAddress The old address of the ACLManager
   * @param newAddress The new address of the ACLManager
   */
  event ACLManagerUpdated(address indexed oldAddress, address indexed newAddress);

  /**
   * @dev Emitted when the ACL admin is updated.
   * @param oldAddress The old address of the ACLAdmin
   * @param newAddress The new address of the ACLAdmin
   */
  event ACLAdminUpdated(address indexed oldAddress, address indexed newAddress);

  /**
   * @dev Emitted when the price oracle sentinel is updated.
   * @param oldAddress The old address of the PriceOracleSentinel
   * @param newAddress The new address of the PriceOracleSentinel
   */
  event PriceOracleSentinelUpdated(address indexed oldAddress, address indexed newAddress);

  /**
   * @dev Emitted when the pool data provider is updated.
   * @param oldAddress The old address of the PoolDataProvider
   * @param newAddress The new address of the PoolDataProvider
   */
  event PoolDataProviderUpdated(address indexed oldAddress, address indexed newAddress);

  /**
   * @dev Emitted when a new proxy is created.
   * @param id The identifier of the proxy
   * @param proxyAddress The address of the created proxy contract
   * @param implementationAddress The address of the implementation contract
   */
  event ProxyCreated(
    bytes32 indexed id,
    address indexed proxyAddress,
    address indexed implementationAddress
  );

  /**
   * @dev Emitted when a new non-proxied contract address is registered.
   * @param id The identifier of the contract
   * @param oldAddress The address of the old contract
   * @param newAddress The address of the new contract
   */
  event AddressSet(bytes32 indexed id, address indexed oldAddress, address indexed newAddress);

  /**
   * @dev Emitted when the implementation of the proxy registered with id is updated
   * @param id The identifier of the contract
   * @param proxyAddress The address of the proxy contract
   * @param oldImplementationAddress The address of the old implementation contract
   * @param newImplementationAddress The address of the new implementation contract
   */
  event AddressSetAsProxy(
    bytes32 indexed id,
    address indexed proxyAddress,
    address oldImplementationAddress,
    address indexed newImplementationAddress
  );

  /**
   * @notice Returns the id of the Aave market to which this contract points to.
   * @return The market id
   */
  function getMarketId() external view returns (string memory);

  /**
   * @notice Associates an id with a specific PoolAddressesProvider.
   * @dev This can be used to create an onchain registry of PoolAddressesProviders to
   * identify and validate multiple Aave markets.
   * @param newMarketId The market id
   */
  function setMarketId(string calldata newMarketId) external;

  /**
   * @notice Returns an address by its identifier.
   * @dev The returned address might be an EOA or a contract, potentially proxied
   * @dev It returns ZERO if there is no registered address with the given id
   * @param id The id
   * @return The address of the registered for the specified id
   */
  function getAddress(bytes32 id) external view returns (address);

  /**
   * @notice General function to update the implementation of a proxy registered with
   * certain `id`. If there is no proxy registered, it will instantiate one and
   * set as implementation the `newImplementationAddress`.
   * @dev IMPORTANT Use this function carefully, only for ids that don't have an explicit
   * setter function, in order to avoid unexpected consequences
   * @param id The id
   * @param newImplementationAddress The address of the new implementation
   */
  function setAddressAsProxy(bytes32 id, address newImplementationAddress) external;

  /**
   * @notice Sets an address for an id replacing the address saved in the addresses map.
   * @dev IMPORTANT Use this function carefully, as it will do a hard replacement
   * @param id The id
   * @param newAddress The address to set
   */
  function setAddress(bytes32 id, address newAddress) external;

  /**
   * @notice Returns the address of the Pool proxy.
   * @return The Pool proxy address
   */
  function getPool() external view returns (address);

  /**
   * @notice Updates the implementation of the Pool, or creates a proxy
   * setting the new `pool` implementation when the function is called for the first time.
   * @param newPoolImpl The new Pool implementation
   */
  function setPoolImpl(address newPoolImpl) external;

  /**
   * @notice Returns the address of the PoolConfigurator proxy.
   * @return The PoolConfigurator proxy address
   */
  function getPoolConfigurator() external view returns (address);

  /**
   * @notice Updates the implementation of the PoolConfigurator, or creates a proxy
   * setting the new `PoolConfigurator` implementation when the function is called for the first time.
   * @param newPoolConfiguratorImpl The new PoolConfigurator implementation
   */
  function setPoolConfiguratorImpl(address newPoolConfiguratorImpl) external;

  /**
   * @notice Returns the address of the price oracle.
   * @return The address of the PriceOracle
   */
  function getPriceOracle() external view returns (address);

  /**
   * @notice Updates the address of the price oracle.
   * @param newPriceOracle The address of the new PriceOracle
   */
  function setPriceOracle(address newPriceOracle) external;

  /**
   * @notice Returns the address of the ACL manager.
   * @return The address of the ACLManager
   */
  function getACLManager() external view returns (address);

  /**
   * @notice Updates the address of the ACL manager.
   * @param newAclManager The address of the new ACLManager
   */
  function setACLManager(address newAclManager) external;

  /**
   * @notice Returns the address of the ACL admin.
   * @return The address of the ACL admin
   */
  function getACLAdmin() external view returns (address);

  /**
   * @notice Updates the address of the ACL admin.
   * @param newAclAdmin The address of the new ACL admin
   */
  function setACLAdmin(address newAclAdmin) external;

  /**
   * @notice Returns the address of the price oracle sentinel.
   * @return The address of the PriceOracleSentinel
   */
  function getPriceOracleSentinel() external view returns (address);

  /**
   * @notice Updates the address of the price oracle sentinel.
   * @param newPriceOracleSentinel The address of the new PriceOracleSentinel
   */
  function setPriceOracleSentinel(address newPriceOracleSentinel) external;

  /**
   * @notice Returns the address of the data provider.
   * @return The address of the DataProvider
   */
  function getPoolDataProvider() external view returns (address);

  /**
   * @notice Updates the address of the data provider.
   * @param newDataProvider The address of the new DataProvider
   */
  function setPoolDataProvider(address newDataProvider) external;
}

// SPDX-License-Identifier: AGPL-3.0
pragma solidity ^0.8.0;

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

/**
 * @title IReserveInterestRateStrategy
 * @author Aave
 * @notice Interface for the calculation of the interest rates
 */
interface IReserveInterestRateStrategy {
  /**
   * @notice Calculates the interest rates depending on the reserve's state and configurations
   * @param params The parameters needed to calculate interest rates
   * @return liquidityRate The liquidity rate expressed in rays
   * @return stableBorrowRate The stable borrow rate expressed in rays
   * @return variableBorrowRate The variable borrow rate expressed in rays
   */
  function calculateInterestRates(
    DataTypes.CalculateInterestRatesParams memory params
  ) external view returns (uint256, uint256, uint256);
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;

library DataTypes {
  struct ReserveData {
    //stores the reserve configuration
    ReserveConfigurationMap configuration;
    //the liquidity index. Expressed in ray
    uint128 liquidityIndex;
    //the current supply rate. Expressed in ray
    uint128 currentLiquidityRate;
    //variable borrow index. Expressed in ray
    uint128 variableBorrowIndex;
    //the current variable borrow rate. Expressed in ray
    uint128 currentVariableBorrowRate;
    //the current stable borrow rate. Expressed in ray
    uint128 currentStableBorrowRate;
    //timestamp of last update
    uint40 lastUpdateTimestamp;
    //the id of the reserve. Represents the position in the list of the active reserves
    uint16 id;
    //aToken address
    address aTokenAddress;
    //stableDebtToken address
    address stableDebtTokenAddress;
    //variableDebtToken address
    address variableDebtTokenAddress;
    //address of the interest rate strategy
    address interestRateStrategyAddress;
    //the current treasury balance, scaled
    uint128 accruedToTreasury;
    //the outstanding unbacked aTokens minted through the bridging feature
    uint128 unbacked;
    //the outstanding debt borrowed against this asset in isolation mode
    uint128 isolationModeTotalDebt;
  }

  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: asset is paused
    //bit 61: borrowing in isolation mode is enabled
    //bit 62: siloed borrowing enabled
    //bit 63: flashloaning enabled
    //bit 64-79: reserve factor
    //bit 80-115 borrow cap in whole tokens, borrowCap == 0 => no cap
    //bit 116-151 supply cap in whole tokens, supplyCap == 0 => no cap
    //bit 152-167 liquidation protocol fee
    //bit 168-175 eMode category
    //bit 176-211 unbacked mint cap in whole tokens, unbackedMintCap == 0 => minting disabled
    //bit 212-251 debt ceiling for isolation mode with (ReserveConfiguration::DEBT_CEILING_DECIMALS) decimals
    //bit 252-255 unused

    uint256 data;
  }

  struct UserConfigurationMap {
    /**
     * @dev Bitmap of the users collaterals and borrows. It is divided in pairs of bits, one pair per asset.
     * The first bit indicates if an asset is used as collateral by the user, the second whether an
     * asset is borrowed by the user.
     */
    uint256 data;
  }

  struct EModeCategory {
    // each eMode category has a custom ltv and liquidation threshold
    uint16 ltv;
    uint16 liquidationThreshold;
    uint16 liquidationBonus;
    // each eMode category may or may not have a custom oracle to override the individual assets price oracles
    address priceSource;
    string label;
  }

  enum InterestRateMode {NONE, STABLE, VARIABLE}

  struct ReserveCache {
    uint256 currScaledVariableDebt;
    uint256 nextScaledVariableDebt;
    uint256 currPrincipalStableDebt;
    uint256 currAvgStableBorrowRate;
    uint256 currTotalStableDebt;
    uint256 nextAvgStableBorrowRate;
    uint256 nextTotalStableDebt;
    uint256 currLiquidityIndex;
    uint256 nextLiquidityIndex;
    uint256 currVariableBorrowIndex;
    uint256 nextVariableBorrowIndex;
    uint256 currLiquidityRate;
    uint256 currVariableBorrowRate;
    uint256 reserveFactor;
    ReserveConfigurationMap reserveConfiguration;
    address aTokenAddress;
    address stableDebtTokenAddress;
    address variableDebtTokenAddress;
    uint40 reserveLastUpdateTimestamp;
    uint40 stableDebtLastUpdateTimestamp;
  }

  struct ExecuteLiquidationCallParams {
    uint256 reservesCount;
    uint256 debtToCover;
    address collateralAsset;
    address debtAsset;
    address user;
    bool receiveAToken;
    address priceOracle;
    uint8 userEModeCategory;
    address priceOracleSentinel;
  }

  struct ExecuteSupplyParams {
    address asset;
    uint256 amount;
    address onBehalfOf;
    uint16 referralCode;
  }

  struct ExecuteBorrowParams {
    address asset;
    address user;
    address onBehalfOf;
    uint256 amount;
    InterestRateMode interestRateMode;
    uint16 referralCode;
    bool releaseUnderlying;
    uint256 maxStableRateBorrowSizePercent;
    uint256 reservesCount;
    address oracle;
    uint8 userEModeCategory;
    address priceOracleSentinel;
  }

  struct ExecuteRepayParams {
    address asset;
    uint256 amount;
    InterestRateMode interestRateMode;
    address onBehalfOf;
    bool useATokens;
  }

  struct ExecuteWithdrawParams {
    address asset;
    uint256 amount;
    address to;
    uint256 reservesCount;
    address oracle;
    uint8 userEModeCategory;
  }

  struct ExecuteSetUserEModeParams {
    uint256 reservesCount;
    address oracle;
    uint8 categoryId;
  }

  struct FinalizeTransferParams {
    address asset;
    address from;
    address to;
    uint256 amount;
    uint256 balanceFromBefore;
    uint256 balanceToBefore;
    uint256 reservesCount;
    address oracle;
    uint8 fromEModeCategory;
  }

  struct FlashloanParams {
    address receiverAddress;
    address[] assets;
    uint256[] amounts;
    uint256[] interestRateModes;
    address onBehalfOf;
    bytes params;
    uint16 referralCode;
    uint256 flashLoanPremiumToProtocol;
    uint256 flashLoanPremiumTotal;
    uint256 maxStableRateBorrowSizePercent;
    uint256 reservesCount;
    address addressesProvider;
    address pool;
    uint8 userEModeCategory;
    bool isAuthorizedFlashBorrower;
  }

  struct FlashloanSimpleParams {
    address receiverAddress;
    address asset;
    uint256 amount;
    bytes params;
    uint16 referralCode;
    uint256 flashLoanPremiumToProtocol;
    uint256 flashLoanPremiumTotal;
  }

  struct FlashLoanRepaymentParams {
    uint256 amount;
    uint256 totalPremium;
    uint256 flashLoanPremiumToProtocol;
    address asset;
    address receiverAddress;
    uint16 referralCode;
  }

  struct CalculateUserAccountDataParams {
    UserConfigurationMap userConfig;
    uint256 reservesCount;
    address user;
    address oracle;
    uint8 userEModeCategory;
  }

  struct ValidateBorrowParams {
    ReserveCache reserveCache;
    UserConfigurationMap userConfig;
    address asset;
    address userAddress;
    uint256 amount;
    InterestRateMode interestRateMode;
    uint256 maxStableLoanPercent;
    uint256 reservesCount;
    address oracle;
    uint8 userEModeCategory;
    address priceOracleSentinel;
    bool isolationModeActive;
    address isolationModeCollateralAddress;
    uint256 isolationModeDebtCeiling;
  }

  struct ValidateLiquidationCallParams {
    ReserveCache debtReserveCache;
    uint256 totalDebt;
    uint256 healthFactor;
    address priceOracleSentinel;
  }

  struct CalculateInterestRatesParams {
    uint256 unbacked;
    uint256 liquidityAdded;
    uint256 liquidityTaken;
    uint256 totalStableDebt;
    uint256 totalVariableDebt;
    uint256 averageStableBorrowRate;
    uint256 reserveFactor;
    address reserve;
    address aToken;
  }

  struct InitReserveParams {
    address asset;
    address aTokenAddress;
    address stableDebtAddress;
    address variableDebtAddress;
    address interestRateStrategyAddress;
    uint16 reservesCount;
    uint16 maxNumberReserves;
  }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;

/**
 * @title Errors library
 * @author Aave
 * @notice Defines the error messages emitted by the different contracts of the Aave protocol
 */
library Errors {
  string public constant CALLER_NOT_POOL_ADMIN = '1'; // 'The caller of the function is not a pool admin'
  string public constant CALLER_NOT_EMERGENCY_ADMIN = '2'; // 'The caller of the function is not an emergency admin'
  string public constant CALLER_NOT_POOL_OR_EMERGENCY_ADMIN = '3'; // 'The caller of the function is not a pool or emergency admin'
  string public constant CALLER_NOT_RISK_OR_POOL_ADMIN = '4'; // 'The caller of the function is not a risk or pool admin'
  string public constant CALLER_NOT_ASSET_LISTING_OR_POOL_ADMIN = '5'; // 'The caller of the function is not an asset listing or pool admin'
  string public constant CALLER_NOT_BRIDGE = '6'; // 'The caller of the function is not a bridge'
  string public constant ADDRESSES_PROVIDER_NOT_REGISTERED = '7'; // 'Pool addresses provider is not registered'
  string public constant INVALID_ADDRESSES_PROVIDER_ID = '8'; // 'Invalid id for the pool addresses provider'
  string public constant NOT_CONTRACT = '9'; // 'Address is not a contract'
  string public constant CALLER_NOT_POOL_CONFIGURATOR = '10'; // 'The caller of the function is not the pool configurator'
  string public constant CALLER_NOT_ATOKEN = '11'; // 'The caller of the function is not an AToken'
  string public constant INVALID_ADDRESSES_PROVIDER = '12'; // 'The address of the pool addresses provider is invalid'
  string public constant INVALID_FLASHLOAN_EXECUTOR_RETURN = '13'; // 'Invalid return value of the flashloan executor function'
  string public constant RESERVE_ALREADY_ADDED = '14'; // 'Reserve has already been added to reserve list'
  string public constant NO_MORE_RESERVES_ALLOWED = '15'; // 'Maximum amount of reserves in the pool reached'
  string public constant EMODE_CATEGORY_RESERVED = '16'; // 'Zero eMode category is reserved for volatile heterogeneous assets'
  string public constant INVALID_EMODE_CATEGORY_ASSIGNMENT = '17'; // 'Invalid eMode category assignment to asset'
  string public constant RESERVE_LIQUIDITY_NOT_ZERO = '18'; // 'The liquidity of the reserve needs to be 0'
  string public constant FLASHLOAN_PREMIUM_INVALID = '19'; // 'Invalid flashloan premium'
  string public constant INVALID_RESERVE_PARAMS = '20'; // 'Invalid risk parameters for the reserve'
  string public constant INVALID_EMODE_CATEGORY_PARAMS = '21'; // 'Invalid risk parameters for the eMode category'
  string public constant BRIDGE_PROTOCOL_FEE_INVALID = '22'; // 'Invalid bridge protocol fee'
  string public constant CALLER_MUST_BE_POOL = '23'; // 'The caller of this function must be a pool'
  string public constant INVALID_MINT_AMOUNT = '24'; // 'Invalid amount to mint'
  string public constant INVALID_BURN_AMOUNT = '25'; // 'Invalid amount to burn'
  string public constant INVALID_AMOUNT = '26'; // 'Amount must be greater than 0'
  string public constant RESERVE_INACTIVE = '27'; // 'Action requires an active reserve'
  string public constant RESERVE_FROZEN = '28'; // 'Action cannot be performed because the reserve is frozen'
  string public constant RESERVE_PAUSED = '29'; // 'Action cannot be performed because the reserve is paused'
  string public constant BORROWING_NOT_ENABLED = '30'; // 'Borrowing is not enabled'
  string public constant STABLE_BORROWING_NOT_ENABLED = '31'; // 'Stable borrowing is not enabled'
  string public constant NOT_ENOUGH_AVAILABLE_USER_BALANCE = '32'; // 'User cannot withdraw more than the available balance'
  string public constant INVALID_INTEREST_RATE_MODE_SELECTED = '33'; // 'Invalid interest rate mode selected'
  string public constant COLLATERAL_BALANCE_IS_ZERO = '34'; // 'The collateral balance is 0'
  string public constant HEALTH_FACTOR_LOWER_THAN_LIQUIDATION_THRESHOLD = '35'; // 'Health factor is lesser than the liquidation threshold'
  string public constant COLLATERAL_CANNOT_COVER_NEW_BORROW = '36'; // 'There is not enough collateral to cover a new borrow'
  string public constant COLLATERAL_SAME_AS_BORROWING_CURRENCY = '37'; // 'Collateral is (mostly) the same currency that is being borrowed'
  string public constant AMOUNT_BIGGER_THAN_MAX_LOAN_SIZE_STABLE = '38'; // 'The requested amount is greater than the max loan size in stable rate mode'
  string public constant NO_DEBT_OF_SELECTED_TYPE = '39'; // 'For repayment of a specific type of debt, the user needs to have debt that type'
  string public constant NO_EXPLICIT_AMOUNT_TO_REPAY_ON_BEHALF = '40'; // 'To repay on behalf of a user an explicit amount to repay is needed'
  string public constant NO_OUTSTANDING_STABLE_DEBT = '41'; // 'User does not have outstanding stable rate debt on this reserve'
  string public constant NO_OUTSTANDING_VARIABLE_DEBT = '42'; // 'User does not have outstanding variable rate debt on this reserve'
  string public constant UNDERLYING_BALANCE_ZERO = '43'; // 'The underlying balance needs to be greater than 0'
  string public constant INTEREST_RATE_REBALANCE_CONDITIONS_NOT_MET = '44'; // 'Interest rate rebalance conditions were not met'
  string public constant HEALTH_FACTOR_NOT_BELOW_THRESHOLD = '45'; // 'Health factor is not below the threshold'
  string public constant COLLATERAL_CANNOT_BE_LIQUIDATED = '46'; // 'The collateral chosen cannot be liquidated'
  string public constant SPECIFIED_CURRENCY_NOT_BORROWED_BY_USER = '47'; // 'User did not borrow the specified currency'
  string public constant INCONSISTENT_FLASHLOAN_PARAMS = '49'; // 'Inconsistent flashloan parameters'
  string public constant BORROW_CAP_EXCEEDED = '50'; // 'Borrow cap is exceeded'
  string public constant SUPPLY_CAP_EXCEEDED = '51'; // 'Supply cap is exceeded'
  string public constant UNBACKED_MINT_CAP_EXCEEDED = '52'; // 'Unbacked mint cap is exceeded'
  string public constant DEBT_CEILING_EXCEEDED = '53'; // 'Debt ceiling is exceeded'
  string public constant UNDERLYING_CLAIMABLE_RIGHTS_NOT_ZERO = '54'; // 'Claimable rights over underlying not zero (aToken supply or accruedToTreasury)'
  string public constant STABLE_DEBT_NOT_ZERO = '55'; // 'Stable debt supply is not zero'
  string public constant VARIABLE_DEBT_SUPPLY_NOT_ZERO = '56'; // 'Variable debt supply is not zero'
  string public constant LTV_VALIDATION_FAILED = '57'; // 'Ltv validation failed'
  string public constant INCONSISTENT_EMODE_CATEGORY = '58'; // 'Inconsistent eMode category'
  string public constant PRICE_ORACLE_SENTINEL_CHECK_FAILED = '59'; // 'Price oracle sentinel validation failed'
  string public constant ASSET_NOT_BORROWABLE_IN_ISOLATION = '60'; // 'Asset is not borrowable in isolation mode'
  string public constant RESERVE_ALREADY_INITIALIZED = '61'; // 'Reserve has already been initialized'
  string public constant USER_IN_ISOLATION_MODE_OR_LTV_ZERO = '62'; // 'User is in isolation mode or ltv is zero'
  string public constant INVALID_LTV = '63'; // 'Invalid ltv parameter for the reserve'
  string public constant INVALID_LIQ_THRESHOLD = '64'; // 'Invalid liquidity threshold parameter for the reserve'
  string public constant INVALID_LIQ_BONUS = '65'; // 'Invalid liquidity bonus parameter for the reserve'
  string public constant INVALID_DECIMALS = '66'; // 'Invalid decimals parameter of the underlying asset of the reserve'
  string public constant INVALID_RESERVE_FACTOR = '67'; // 'Invalid reserve factor parameter for the reserve'
  string public constant INVALID_BORROW_CAP = '68'; // 'Invalid borrow cap for the reserve'
  string public constant INVALID_SUPPLY_CAP = '69'; // 'Invalid supply cap for the reserve'
  string public constant INVALID_LIQUIDATION_PROTOCOL_FEE = '70'; // 'Invalid liquidation protocol fee for the reserve'
  string public constant INVALID_EMODE_CATEGORY = '71'; // 'Invalid eMode category for the reserve'
  string public constant INVALID_UNBACKED_MINT_CAP = '72'; // 'Invalid unbacked mint cap for the reserve'
  string public constant INVALID_DEBT_CEILING = '73'; // 'Invalid debt ceiling for the reserve
  string public constant INVALID_RESERVE_INDEX = '74'; // 'Invalid reserve index'
  string public constant ACL_ADMIN_CANNOT_BE_ZERO = '75'; // 'ACL admin cannot be set to the zero address'
  string public constant INCONSISTENT_PARAMS_LENGTH = '76'; // 'Array parameters that should be equal length are not'
  string public constant ZERO_ADDRESS_NOT_VALID = '77'; // 'Zero address not valid'
  string public constant INVALID_EXPIRATION = '78'; // 'Invalid expiration'
  string public constant INVALID_SIGNATURE = '79'; // 'Invalid signature'
  string public constant OPERATION_NOT_SUPPORTED = '80'; // 'Operation not supported'
  string public constant DEBT_CEILING_NOT_ZERO = '81'; // 'Debt ceiling is not zero'
  string public constant ASSET_NOT_LISTED = '82'; // 'Asset is not listed'
  string public constant INVALID_OPTIMAL_USAGE_RATIO = '83'; // 'Invalid optimal usage ratio'
  string public constant INVALID_OPTIMAL_STABLE_TO_TOTAL_DEBT_RATIO = '84'; // 'Invalid optimal stable to total debt ratio'
  string public constant UNDERLYING_CANNOT_BE_RESCUED = '85'; // 'The underlying asset cannot be rescued'
  string public constant ADDRESSES_PROVIDER_ALREADY_ADDED = '86'; // 'Reserve has already been added to reserve list'
  string public constant POOL_ADDRESSES_DO_NOT_MATCH = '87'; // 'The token implementation pool address and the pool address provided by the initializing pool do not match'
  string public constant STABLE_BORROWING_ENABLED = '88'; // 'Stable borrowing is enabled'
  string public constant SILOED_BORROWING_VIOLATION = '89'; // 'User is trying to borrow multiple assets including a siloed one'
  string public constant RESERVE_DEBT_NOT_ZERO = '90'; // the total debt of the reserve needs to be 0
  string public constant FLASHLOAN_DISABLED = '91'; // FlashLoaning for this asset is disabled
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;

/**
 * @title PercentageMath library
 * @author Aave
 * @notice Provides functions to perform percentage calculations
 * @dev Percentages are defined by default with 2 decimals of precision (100.00). The precision is indicated by PERCENTAGE_FACTOR
 * @dev Operations are rounded. If a value is >=.5, will be rounded up, otherwise rounded down.
 */
library PercentageMath {
  // Maximum percentage factor (100.00%)
  uint256 internal constant PERCENTAGE_FACTOR = 1e4;

  // Half percentage factor (50.00%)
  uint256 internal constant HALF_PERCENTAGE_FACTOR = 0.5e4;

  /**
   * @notice Executes a percentage multiplication
   * @dev assembly optimized for improved gas savings, see https://twitter.com/transmissions11/status/1451131036377571328
   * @param value The value of which the percentage needs to be calculated
   * @param percentage The percentage of the value to be calculated
   * @return result value percentmul percentage
   */
  function percentMul(uint256 value, uint256 percentage) internal pure returns (uint256 result) {
    // to avoid overflow, value <= (type(uint256).max - HALF_PERCENTAGE_FACTOR) / percentage
    assembly {
      if iszero(
        or(
          iszero(percentage),
          iszero(gt(value, div(sub(not(0), HALF_PERCENTAGE_FACTOR), percentage)))
        )
      ) {
        revert(0, 0)
      }

      result := div(add(mul(value, percentage), HALF_PERCENTAGE_FACTOR), PERCENTAGE_FACTOR)
    }
  }

  /**
   * @notice Executes a percentage division
   * @dev assembly optimized for improved gas savings, see https://twitter.com/transmissions11/status/1451131036377571328
   * @param value The value of which the percentage needs to be calculated
   * @param percentage The percentage of the value to be calculated
   * @return result value percentdiv percentage
   */
  function percentDiv(uint256 value, uint256 percentage) internal pure returns (uint256 result) {
    // to avoid overflow, value <= (type(uint256).max - halfPercentage) / PERCENTAGE_FACTOR
    assembly {
      if or(
        iszero(percentage),
        iszero(iszero(gt(value, div(sub(not(0), div(percentage, 2)), PERCENTAGE_FACTOR))))
      ) {
        revert(0, 0)
      }

      result := div(add(mul(value, PERCENTAGE_FACTOR), div(percentage, 2)), percentage)
    }
  }
}

// SPDX-License-Identifier: BUSL-1.1
pragma solidity ^0.8.0;

/**
 * @title WadRayMath library
 * @author Aave
 * @notice Provides functions to perform calculations with Wad and Ray units
 * @dev Provides mul and div function for wads (decimal numbers with 18 digits of precision) and rays (decimal numbers
 * with 27 digits of precision)
 * @dev Operations are rounded. If a value is >=.5, will be rounded up, otherwise rounded down.
 */
library WadRayMath {
  // HALF_WAD and HALF_RAY expressed with extended notation as constant with operations are not supported in Yul assembly
  uint256 internal constant WAD = 1e18;
  uint256 internal constant HALF_WAD = 0.5e18;

  uint256 internal constant RAY = 1e27;
  uint256 internal constant HALF_RAY = 0.5e27;

  uint256 internal constant WAD_RAY_RATIO = 1e9;

  /**
   * @dev Multiplies two wad, rounding half up to the nearest wad
   * @dev assembly optimized for improved gas savings, see https://twitter.com/transmissions11/status/1451131036377571328
   * @param a Wad
   * @param b Wad
   * @return c = a*b, in wad
   */
  function wadMul(uint256 a, uint256 b) internal pure returns (uint256 c) {
    // to avoid overflow, a <= (type(uint256).max - HALF_WAD) / b
    assembly {
      if iszero(or(iszero(b), iszero(gt(a, div(sub(not(0), HALF_WAD), b))))) {
        revert(0, 0)
      }

      c := div(add(mul(a, b), HALF_WAD), WAD)
    }
  }

  /**
   * @dev Divides two wad, rounding half up to the nearest wad
   * @dev assembly optimized for improved gas savings, see https://twitter.com/transmissions11/status/1451131036377571328
   * @param a Wad
   * @param b Wad
   * @return c = a/b, in wad
   */
  function wadDiv(uint256 a, uint256 b) internal pure returns (uint256 c) {
    // to avoid overflow, a <= (type(uint256).max - halfB) / WAD
    assembly {
      if or(iszero(b), iszero(iszero(gt(a, div(sub(not(0), div(b, 2)), WAD))))) {
        revert(0, 0)
      }

      c := div(add(mul(a, WAD), div(b, 2)), b)
    }
  }

  /**
   * @notice Multiplies two ray, rounding half up to the nearest ray
   * @dev assembly optimized for improved gas savings, see https://twitter.com/transmissions11/status/1451131036377571328
   * @param a Ray
   * @param b Ray
   * @return c = a raymul b
   */
  function rayMul(uint256 a, uint256 b) internal pure returns (uint256 c) {
    // to avoid overflow, a <= (type(uint256).max - HALF_RAY) / b
    assembly {
      if iszero(or(iszero(b), iszero(gt(a, div(sub(not(0), HALF_RAY), b))))) {
        revert(0, 0)
      }

      c := div(add(mul(a, b), HALF_RAY), RAY)
    }
  }

  /**
   * @notice Divides two ray, rounding half up to the nearest ray
   * @dev assembly optimized for improved gas savings, see https://twitter.com/transmissions11/status/1451131036377571328
   * @param a Ray
   * @param b Ray
   * @return c = a raydiv b
   */
  function rayDiv(uint256 a, uint256 b) internal pure returns (uint256 c) {
    // to avoid overflow, a <= (type(uint256).max - halfB) / RAY
    assembly {
      if or(iszero(b), iszero(iszero(gt(a, div(sub(not(0), div(b, 2)), RAY))))) {
        revert(0, 0)
      }

      c := div(add(mul(a, RAY), div(b, 2)), b)
    }
  }

  /**
   * @dev Casts ray down to wad
   * @dev assembly optimized for improved gas savings, see https://twitter.com/transmissions11/status/1451131036377571328
   * @param a Ray
   * @return b = a converted to wad, rounded half up to the nearest wad
   */
  function rayToWad(uint256 a) internal pure returns (uint256 b) {
    assembly {
      b := div(a, WAD_RAY_RATIO)
      let remainder := mod(a, WAD_RAY_RATIO)
      if iszero(lt(remainder, div(WAD_RAY_RATIO, 2))) {
        b := add(b, 1)
      }
    }
  }

  /**
   * @dev Converts wad up to ray
   * @dev assembly optimized for improved gas savings, see https://twitter.com/transmissions11/status/1451131036377571328
   * @param a Wad
   * @return b = a converted in ray
   */
  function wadToRay(uint256 a) internal pure returns (uint256 b) {
    // to avoid overflow, b/WAD_RAY_RATIO == a
    assembly {
      b := mul(a, WAD_RAY_RATIO)

      if iszero(eq(div(b, WAD_RAY_RATIO), a)) {
        revert(0, 0)
      }
    }
  }
}

{
  "remappings": [
    "ds-test/=lib/forge-std/lib/ds-test/src/",
    "erc20-helpers/=lib/erc20-helpers/src/",
    "forge-std/=lib/forge-std/src/",
    "sparklend-v1-core/=lib/sparklend-v1-core/contracts/",
    "@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    "erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
    "openzeppelin-contracts/=lib/openzeppelin-contracts/"
  ],
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "metadata": {
    "useLiteralContent": false,
    "bytecodeHash": "ipfs",
    "appendCBOR": true
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "evmVersion": "paris",
  "viaIR": false,
  "libraries": {}
}

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[{"inputs":[{"internalType":"contract IPoolAddressesProvider","name":"provider","type":"address"},{"internalType":"address","name":"rateSource","type":"address"},{"internalType":"uint256","name":"optimalUsageRatio","type":"uint256"},{"internalType":"uint256","name":"baseVariableBorrowRate","type":"uint256"},{"internalType":"int256","name":"variableRateSlope1Spread","type":"int256"},{"internalType":"uint256","name":"variableRateSlope2","type":"uint256"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"ADDRESSES_PROVIDER","outputs":[{"internalType":"contract IPoolAddressesProvider","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAX_EXCESS_STABLE_TO_TOTAL_DEBT_RATIO","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAX_EXCESS_USAGE_RATIO","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"OPTIMAL_STABLE_TO_TOTAL_DEBT_RATIO","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"OPTIMAL_USAGE_RATIO","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"RATE_SOURCE","outputs":[{"internalType":"contract IRateSource","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"uint256","name":"unbacked","type":"uint256"},{"internalType":"uint256","name":"liquidityAdded","type":"uint256"},{"internalType":"uint256","name":"liquidityTaken","type":"uint256"},{"internalType":"uint256","name":"totalStableDebt","type":"uint256"},{"internalType":"uint256","name":"totalVariableDebt","type":"uint256"},{"internalType":"uint256","name":"averageStableBorrowRate","type":"uint256"},{"internalType":"uint256","name":"reserveFactor","type":"uint256"},{"internalType":"address","name":"reserve","type":"address"},{"internalType":"address","name":"aToken","type":"address"}],"internalType":"struct DataTypes.CalculateInterestRatesParams","name":"params","type":"tuple"}],"name":"calculateInterestRates","outputs":[{"internalType":"uint256","name":"liquidityRate","type":"uint256"},{"internalType":"uint256","name":"stableBorrowRate","type":"uint256"},{"internalType":"uint256","name":"variableBorrowRate","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getBaseStableBorrowRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getBaseVariableBorrowRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getMaxVariableBorrowRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getStableRateExcessOffset","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"getStableRateSlope1","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"getStableRateSlope2","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"getVariableRateSlope1","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getVariableRateSlope1Spread","outputs":[{"internalType":"int256","name":"","type":"int256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getVariableRateSlope2","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]

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-----Decoded View---------------
Arg [0] : provider (address): 0x02C3eA4e34C0cBd694D2adFa2c690EECbC1793eE
Arg [1] : rateSource (address): 0x62B122A1D1ea2082c47c3Fb70e788C168E96afD8
Arg [2] : optimalUsageRatio (uint256): 950000000000000000000000000
Arg [3] : baseVariableBorrowRate (uint256): 0
Arg [4] : variableRateSlope1Spread (int256): 10000000000000000000000000
Arg [5] : variableRateSlope2 (uint256): 150000000000000000000000000

-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 00000000000000000000000002c3ea4e34c0cbd694d2adfa2c690eecbc1793ee
Arg [1] : 00000000000000000000000062b122a1d1ea2082c47c3fb70e788c168e96afd8
Arg [2] : 00000000000000000000000000000000000000000311d253316c79d376000000
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [4] : 000000000000000000000000000000000000000000084595161401484a000000
Arg [5] : 0000000000000000000000000000000000000000007c13bc4b2c133c56000000