Transaction Hash:
Block:
15534131 at Sep-14-2022 05:09:23 PM +UTC
Transaction Fee:
0.00072922110279023 ETH
$2.75
Gas Used:
38,905 Gas / 18.743634566 Gwei
Emitted Events:
176 |
JumpRateModelV2.NewInterestParams( baseRatePerBlock=2378234398, multiplierPerBlock=67949554250, jumpMultiplierPerBlock=951293759512, kink=700000000000000000 )
|
Account State Difference:
Address | Before | After | State Difference | ||
---|---|---|---|---|---|
0x8edC559E...44Ea88dc0 | |||||
0xd1F60eBe...6f9d7A8BC | (Drops: Deployer) |
3.497319353167952085 Eth
Nonce: 969
|
3.496590132065161855 Eth
Nonce: 970
| 0.00072922110279023 | |
0xEA674fdD...16B898ec8
Miner
| (Ethermine) | 934.290737366707553702 Eth | 934.290776271707553702 Eth | 0.000038905 |
Execution Trace
JumpRateModelV2.updateJumpRateModel( baseRatePerYear=5000000000000000, multiplierPerYear=100000000000000000, jumpMultiplierPerYear=2000000000000000000, kink_=700000000000000000 )
// SPDX-License-Identifier: MIT pragma solidity 0.6.12; import "./SafeMath.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 { using SafeMath for uint; event NewInterestParams(uint baseRatePerBlock, uint multiplierPerBlock, uint jumpMultiplierPerBlock, uint kink); /** * @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 = 2102400; /** * @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 1e18) * @param multiplierPerYear The rate of increase in interest rate wrt utilization (scaled by 1e18) * @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 1e18) * @param multiplierPerYear The rate of increase in interest rate wrt utilization (scaled by 1e18) * @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, 1e18] */ 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.mul(1e18).div(cash.add(borrows).sub(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 1e18) */ function getBorrowRateInternal(uint cash, uint borrows, uint reserves) internal view returns (uint) { uint util = utilizationRate(cash, borrows, reserves); if (util <= kink) { return util.mul(multiplierPerBlock).div(1e18).add(baseRatePerBlock); } else { uint normalRate = kink.mul(multiplierPerBlock).div(1e18).add(baseRatePerBlock); uint excessUtil = util.sub(kink); return excessUtil.mul(jumpMultiplierPerBlock).div(1e18).add(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 1e18) */ function getSupplyRate(uint cash, uint borrows, uint reserves, uint reserveFactorMantissa) public view virtual returns (uint) { uint oneMinusReserveFactor = uint(1e18).sub(reserveFactorMantissa); uint borrowRate = getBorrowRateInternal(cash, borrows, reserves); uint rateToPool = borrowRate.mul(oneMinusReserveFactor).div(1e18); return utilizationRate(cash, borrows, reserves).mul(rateToPool).div(1e18); } /** * @notice Internal function to update the parameters of the interest rate model * @param baseRatePerYear The approximate target base APR, as a mantissa (scaled by 1e18) * @param multiplierPerYear The rate of increase in interest rate wrt utilization (scaled by 1e18) * @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.div(blocksPerYear); multiplierPerBlock = (multiplierPerYear.mul(1e18)).div(blocksPerYear.mul(kink_)); jumpMultiplierPerBlock = jumpMultiplierPerYear.div(blocksPerYear); kink = kink_; emit NewInterestParams(baseRatePerBlock, multiplierPerBlock, jumpMultiplierPerBlock, kink); } } // SPDX-License-Identifier: MIT pragma solidity 0.6.12; /** * @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) external virtual 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) external virtual view returns (uint); } // SPDX-License-Identifier: MIT pragma solidity 0.6.12; 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 { \t/** * @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); } /** * @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 1e18) */ function getSupplyRate(uint cash, uint borrows, uint reserves, uint reserveFactorMantissa) public view virtual override(InterestRateModel, BaseJumpRateModelV2) returns (uint) { uint oneMinusReserveFactor = uint(1e18).sub(reserveFactorMantissa); uint borrowRate = getBorrowRateInternal(cash, borrows, reserves); uint rateToPool = borrowRate.mul(oneMinusReserveFactor).div(1e18); return utilizationRate(cash, borrows, reserves).mul(rateToPool).div(1e18); } constructor(uint baseRatePerYear, uint multiplierPerYear, uint jumpMultiplierPerYear, uint kink_, address owner_) \tBaseJumpRateModelV2(baseRatePerYear,multiplierPerYear,jumpMultiplierPerYear,kink_,owner_) public {} } // SPDX-License-Identifier: MIT pragma solidity 0.6.12; // From https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/math/Math.sol // Subject to the MIT license. /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the addition of two unsigned integers, reverting with custom message on overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, errorMessage); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on underflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot underflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction underflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on underflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot underflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, errorMessage); return c; } /** * @dev Returns the integer division of two unsigned integers. * Reverts on division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. * Reverts with custom message on division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } }