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// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.23;

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


/**
  * @title Compound's JumpRateModel Contract V2 for V2 cTokens
  * @author Arr00
  * @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) override public view returns (uint) {
        return getBorrowRateInternal(cash, borrows, reserves);
    }

    constructor(uint256 blocksPerYear_, uint baseRatePerYear, uint multiplierPerYear, uint jumpMultiplierPerYear, uint kink_, address owner_)
    BaseJumpRateModelV2(blocksPerYear_, baseRatePerYear, multiplierPerYear, jumpMultiplierPerYear, kink_, owner_) public {}
}

// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.23;

import "contracts/InterestRateModel.sol";

/**
  * @title Logic for Compound's JumpRateModel Contract V2.
  * @author Compound (modified by Dharma Labs, refactored by Arr00)
  * @notice Version 2 modifies Version 1 by enabling updateable parameters.
  */
abstract contract BaseJumpRateModelV2 is InterestRateModel {
    event NewInterestParams(uint baseRatePerBlock, uint multiplierPerBlock, uint jumpMultiplierPerBlock, uint kink);
    event OwnershipTransferred(address oldOwner, address newOwner);

    error Unauthorized();

    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 blocksPerYear;

    /**
     * @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 blocksPerYear_ The approximate number of blocks per year on the current chain
     * @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(uint256 blocksPerYear_, uint baseRatePerYear, uint multiplierPerYear, uint jumpMultiplierPerYear, uint kink_, address owner_) internal {
        owner = owner_;

        blocksPerYear = blocksPerYear_;

        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_) virtual external {
        if (msg.sender != owner) {
            revert Unauthorized();
        }

        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) virtual override public view 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);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual {
        if (msg.sender != owner) {
            revert Unauthorized();
        }

        address oldOwner = owner;
        owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

// SPDX-License-Identifier: BSD-3-Clause
pragma solidity 0.8.23;

/**
  * @title Compound's InterestRateModel Interface
  * @author Compound
  */
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) virtual public view 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) virtual public view returns (uint);

    /**
     * @notice Calculates the current borrow and 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 (uint, uint) The borrow rate percentage per block as a mantissa (scaled by BASE),
     *         supply rate percentage per block as a mantissa (scaled by BASE)
     */
    function getMarketRates(uint cash, uint borrows, uint reserves, uint reserveFactorMantissa) virtual public view returns (uint, uint) {
      return (getBorrowRate(cash, borrows, reserves), getSupplyRate(cash, borrows, reserves, reserveFactorMantissa));
    }
}

{
  "evmVersion": "shanghai",
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "libraries": {
    "JumpRateModelV2.sol": {}
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  }
}

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00000000000000000000000000000000000000000000000000000000002819a00000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000058d15e17628000000000000000000000000000000000000000000000000000014d1120d7b1600000000000000000000000000000000000000000000000000000b1a2bc2ec50000000000000000000000000000043a314183c0033528827be7cf426523bac412780

-----Decoded View---------------
Arg [0] : blocksPerYear_ (uint256): 2628000
Arg [1] : baseRatePerYear (uint256): 0
Arg [2] : multiplierPerYear (uint256): 400000000000000000
Arg [3] : jumpMultiplierPerYear (uint256): 1500000000000000000
Arg [4] : kink_ (uint256): 800000000000000000
Arg [5] : owner_ (address): 0x43A314183c0033528827Be7cF426523bAc412780

-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000000000000000000000000002819a0
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [2] : 000000000000000000000000000000000000000000000000058d15e176280000
Arg [3] : 00000000000000000000000000000000000000000000000014d1120d7b160000
Arg [4] : 0000000000000000000000000000000000000000000000000b1a2bc2ec500000
Arg [5] : 00000000000000000000000043a314183c0033528827be7cf426523bac412780