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// SPDX-License-Identifier: BSD-3-Clause
pragma solidity ^0.8.10;

import "./BaseJumpRateModelV2.sol";
import "./InterestRateModel.sol";

/**
 * @title Orbit's JumpRateModel Contract V2 for V2 cTokens
 * @author Orbit
 * @notice Supports only for V2 cTokens
 */
contract JumpRateModelV2 is InterestRateModel, BaseJumpRateModelV2 {
    /**
     * @notice Calculates the current borrow rate per block
     * @param cash The amount of cash in the market
     * @param borrows The amount of borrows in the market
     * @param reserves The amount of reserves in the market
     * @return The borrow rate percentage per block as a mantissa (scaled by 1e18)
     */
    function getBorrowRate(
        uint cash,
        uint borrows,
        uint reserves
    ) external view override returns (uint) {
        return getBorrowRateInternal(cash, borrows, reserves);
    }

    constructor(
        uint baseRatePerYear,
        uint multiplierPerYear,
        uint jumpMultiplierPerYear,
        uint kink_,
        address owner_
    )
        public
        BaseJumpRateModelV2(
            baseRatePerYear,
            multiplierPerYear,
            jumpMultiplierPerYear,
            kink_,
            owner_
        )
    {}
}

// SPDX-License-Identifier: BSD-3-Clause
pragma solidity ^0.8.10;

import "./InterestRateModel.sol";

/**
 * @title Orbit's BaseJumpRateModelV2 Contract
 * @author Orbit Protocol
 * @notice
 */
abstract contract BaseJumpRateModelV2 is InterestRateModel {
    event NewInterestParams(
        uint baseRatePerBlock,
        uint multiplierPerBlock,
        uint jumpMultiplierPerBlock,
        uint kink
    );

    uint256 private constant BASE = 1e18;

    /**
     * @notice The address of the owner, i.e. the Timelock contract, which can update parameters directly
     */
    address public owner;

    /**
     * @notice The approximate number of blocks per year that is assumed by the interest rate model
     */
    uint public constant blocksPerYear = 15768000;

    /**
     * @notice The multiplier of utilization rate that gives the slope of the interest rate
     */
    uint public multiplierPerBlock;

    /**
     * @notice The base interest rate which is the y-intercept when utilization rate is 0
     */
    uint public baseRatePerBlock;

    /**
     * @notice The multiplierPerBlock after hitting a specified utilization point
     */
    uint public jumpMultiplierPerBlock;

    /**
     * @notice The utilization point at which the jump multiplier is applied
     */
    uint public kink;

    /**
     * @notice Construct an interest rate model
     * @param baseRatePerYear The approximate target base APR, as a mantissa (scaled by BASE)
     * @param multiplierPerYear The rate of increase in interest rate wrt utilization (scaled by BASE)
     * @param jumpMultiplierPerYear The multiplierPerBlock after hitting a specified utilization point
     * @param kink_ The utilization point at which the jump multiplier is applied
     * @param owner_ The address of the owner, i.e. the Timelock contract (which has the ability to update parameters directly)
     */
    constructor(
        uint baseRatePerYear,
        uint multiplierPerYear,
        uint jumpMultiplierPerYear,
        uint kink_,
        address owner_
    ) internal {
        owner = owner_;

        updateJumpRateModelInternal(
            baseRatePerYear,
            multiplierPerYear,
            jumpMultiplierPerYear,
            kink_
        );
    }

    /**
     * @notice Update the parameters of the interest rate model (only callable by owner, i.e. Timelock)
     * @param baseRatePerYear The approximate target base APR, as a mantissa (scaled by BASE)
     * @param multiplierPerYear The rate of increase in interest rate wrt utilization (scaled by BASE)
     * @param jumpMultiplierPerYear The multiplierPerBlock after hitting a specified utilization point
     * @param kink_ The utilization point at which the jump multiplier is applied
     */
    function updateJumpRateModel(
        uint baseRatePerYear,
        uint multiplierPerYear,
        uint jumpMultiplierPerYear,
        uint kink_
    ) external virtual {
        require(msg.sender == owner, "only the owner may call this function.");

        updateJumpRateModelInternal(
            baseRatePerYear,
            multiplierPerYear,
            jumpMultiplierPerYear,
            kink_
        );
    }

    /**
     * @notice Calculates the utilization rate of the market: `borrows / (cash + borrows - reserves)`
     * @param cash The amount of cash in the market
     * @param borrows The amount of borrows in the market
     * @param reserves The amount of reserves in the market (currently unused)
     * @return The utilization rate as a mantissa between [0, BASE]
     */
    function utilizationRate(
        uint cash,
        uint borrows,
        uint reserves
    ) public pure returns (uint) {
        // Utilization rate is 0 when there are no borrows
        if (borrows == 0) {
            return 0;
        }

        return (borrows * BASE) / (cash + borrows - reserves);
    }

    /**
     * @notice Calculates the current borrow rate per block, with the error code expected by the market
     * @param cash The amount of cash in the market
     * @param borrows The amount of borrows in the market
     * @param reserves The amount of reserves in the market
     * @return The borrow rate percentage per block as a mantissa (scaled by BASE)
     */
    function getBorrowRateInternal(
        uint cash,
        uint borrows,
        uint reserves
    ) internal view returns (uint) {
        uint util = utilizationRate(cash, borrows, reserves);

        if (util <= kink) {
            return ((util * multiplierPerBlock) / BASE) + baseRatePerBlock;
        } else {
            uint normalRate = ((kink * multiplierPerBlock) / BASE) +
                baseRatePerBlock;
            uint excessUtil = util - kink;
            return ((excessUtil * jumpMultiplierPerBlock) / BASE) + normalRate;
        }
    }

    /**
     * @notice Calculates the current supply rate per block
     * @param cash The amount of cash in the market
     * @param borrows The amount of borrows in the market
     * @param reserves The amount of reserves in the market
     * @param reserveFactorMantissa The current reserve factor for the market
     * @return The supply rate percentage per block as a mantissa (scaled by BASE)
     */
    function getSupplyRate(
        uint cash,
        uint borrows,
        uint reserves,
        uint reserveFactorMantissa
    ) public view virtual override returns (uint) {
        uint oneMinusReserveFactor = BASE - reserveFactorMantissa;
        uint borrowRate = getBorrowRateInternal(cash, borrows, reserves);
        uint rateToPool = (borrowRate * oneMinusReserveFactor) / BASE;
        return (utilizationRate(cash, borrows, reserves) * rateToPool) / BASE;
    }

    /**
     * @notice Internal function to update the parameters of the interest rate model
     * @param baseRatePerYear The approximate target base APR, as a mantissa (scaled by BASE)
     * @param multiplierPerYear The rate of increase in interest rate wrt utilization (scaled by BASE)
     * @param jumpMultiplierPerYear The multiplierPerBlock after hitting a specified utilization point
     * @param kink_ The utilization point at which the jump multiplier is applied
     */
    function updateJumpRateModelInternal(
        uint baseRatePerYear,
        uint multiplierPerYear,
        uint jumpMultiplierPerYear,
        uint kink_
    ) internal {
        baseRatePerBlock = baseRatePerYear / blocksPerYear;
        multiplierPerBlock =
            (multiplierPerYear * BASE) /
            (blocksPerYear * kink_);
        jumpMultiplierPerBlock = jumpMultiplierPerYear / blocksPerYear;
        kink = kink_;

        emit NewInterestParams(
            baseRatePerBlock,
            multiplierPerBlock,
            jumpMultiplierPerBlock,
            kink
        );
    }
}

// SPDX-License-Identifier: BSD-3-Clause
pragma solidity ^0.8.10;

/**
 * @title Interest Rate Model Interface
 * @author Orbit
 */
abstract contract InterestRateModel {
    /// @notice Indicator that this is an InterestRateModel contract (for inspection)
    bool public constant isInterestRateModel = true;

    /**
     * @notice Calculates the current borrow interest rate per block
     * @param cash The total amount of cash the market has
     * @param borrows The total amount of borrows the market has outstanding
     * @param reserves The total amount of reserves the market has
     * @return The borrow rate per block (as a percentage, and scaled by 1e18)
     */
    function getBorrowRate(
        uint cash,
        uint borrows,
        uint reserves
    ) external view virtual returns (uint);

    /**
     * @notice Calculates the current supply interest rate per block
     * @param cash The total amount of cash the market has
     * @param borrows The total amount of borrows the market has outstanding
     * @param reserves The total amount of reserves the market has
     * @param reserveFactorMantissa The current reserve factor the market has
     * @return The supply rate per block (as a percentage, and scaled by 1e18)
     */
    function getSupplyRate(
        uint cash,
        uint borrows,
        uint reserves,
        uint reserveFactorMantissa
    ) external view virtual returns (uint);
}

{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "evmVersion": "paris",
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

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[{"inputs":[{"internalType":"uint256","name":"baseRatePerYear","type":"uint256"},{"internalType":"uint256","name":"multiplierPerYear","type":"uint256"},{"internalType":"uint256","name":"jumpMultiplierPerYear","type":"uint256"},{"internalType":"uint256","name":"kink_","type":"uint256"},{"internalType":"address","name":"owner_","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"baseRatePerBlock","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"multiplierPerBlock","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"jumpMultiplierPerBlock","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"kink","type":"uint256"}],"name":"NewInterestParams","type":"event"},{"inputs":[],"name":"baseRatePerBlock","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"blocksPerYear","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"cash","type":"uint256"},{"internalType":"uint256","name":"borrows","type":"uint256"},{"internalType":"uint256","name":"reserves","type":"uint256"}],"name":"getBorrowRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"cash","type":"uint256"},{"internalType":"uint256","name":"borrows","type":"uint256"},{"internalType":"uint256","name":"reserves","type":"uint256"},{"internalType":"uint256","name":"reserveFactorMantissa","type":"uint256"}],"name":"getSupplyRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isInterestRateModel","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"jumpMultiplierPerBlock","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"kink","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"multiplierPerBlock","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"baseRatePerYear","type":"uint256"},{"internalType":"uint256","name":"multiplierPerYear","type":"uint256"},{"internalType":"uint256","name":"jumpMultiplierPerYear","type":"uint256"},{"internalType":"uint256","name":"kink_","type":"uint256"}],"name":"updateJumpRateModel","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"cash","type":"uint256"},{"internalType":"uint256","name":"borrows","type":"uint256"},{"internalType":"uint256","name":"reserves","type":"uint256"}],"name":"utilizationRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"pure","type":"function"}]

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000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000d529ae9e8600000000000000000000000000000000000000000000000000000f207539952d00000000000000000000000000000000000000000000000000000b1a2bc2ec5000000000000000000000000000006315f65843e7582508e4f0aac20a7203e7b09f02

-----Decoded View---------------
Arg [0] : baseRatePerYear (uint256): 0
Arg [1] : multiplierPerYear (uint256): 60000000000000000
Arg [2] : jumpMultiplierPerYear (uint256): 1090000000000000000
Arg [3] : kink_ (uint256): 800000000000000000
Arg [4] : owner_ (address): 0x6315F65843e7582508e4F0aAC20a7203E7B09F02

-----Encoded View---------------
5 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [1] : 00000000000000000000000000000000000000000000000000d529ae9e860000
Arg [2] : 0000000000000000000000000000000000000000000000000f207539952d0000
Arg [3] : 0000000000000000000000000000000000000000000000000b1a2bc2ec500000
Arg [4] : 0000000000000000000000006315f65843e7582508e4f0aac20a7203e7b09f02