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0x60806040 | 19065188 | 162 days ago | IN | Create: JumpRateModelV2 | 0 ETH | 0.00707311 |
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Contract Source Code Verified (Exact Match)
Contract Name:
JumpRateModelV2
Compiler Version
v0.8.23+commit.f704f362
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: BSD-3-Clause pragma solidity 0.8.23; import "BaseJumpRateModelV2.sol"; import "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 "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); 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); } }
// 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" ] } } }
Contract Security Audit
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[{"inputs":[{"internalType":"uint256","name":"blocksPerYear_","type":"uint256"},{"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"},{"inputs":[],"name":"Unauthorized","type":"error"},{"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":"getMarketRates","outputs":[{"internalType":"uint256","name":"","type":"uint256"},{"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"}]
Contract Creation Code
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Deployed Bytecode
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
Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000000000000000000000000000000000000002819a0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002c68af0bb1400000000000000000000000000000000000000000000000000000f207539952d00000000000000000000000000000000000000000000000000000b1a2bc2ec50000000000000000000000000000043a314183c0033528827be7cf426523bac412780
-----Decoded View---------------
Arg [0] : blocksPerYear_ (uint256): 2628000
Arg [1] : baseRatePerYear (uint256): 0
Arg [2] : multiplierPerYear (uint256): 200000000000000000
Arg [3] : jumpMultiplierPerYear (uint256): 1090000000000000000
Arg [4] : kink_ (uint256): 800000000000000000
Arg [5] : owner_ (address): 0x43A314183c0033528827Be7cF426523bAc412780
-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 00000000000000000000000000000000000000000000000000000000002819a0
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000000
Arg [2] : 00000000000000000000000000000000000000000000000002c68af0bb140000
Arg [3] : 0000000000000000000000000000000000000000000000000f207539952d0000
Arg [4] : 0000000000000000000000000000000000000000000000000b1a2bc2ec500000
Arg [5] : 00000000000000000000000043a314183c0033528827be7cf426523bac412780
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