mirror of
https://github.com/Instadapp/aave-protocol-v2.git
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346 lines
12 KiB
Solidity
346 lines
12 KiB
Solidity
// SPDX-License-Identifier: agpl-3.0
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pragma solidity 0.6.12;
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import {Errors} from '../helpers/Errors.sol';
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import {DataTypes} from '../types/DataTypes.sol';
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/**
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* @title ReserveConfiguration library
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* @author Aave
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* @notice Implements the bitmap logic to handle the reserve configuration
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*/
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library ReserveConfiguration {
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uint256 constant LTV_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0000; // prettier-ignore
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uint256 constant LIQUIDATION_THRESHOLD_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0000FFFF; // prettier-ignore
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uint256 constant LIQUIDATION_BONUS_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0000FFFFFFFF; // prettier-ignore
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uint256 constant DECIMALS_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00FFFFFFFFFFFF; // prettier-ignore
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uint256 constant ACTIVE_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFF; // prettier-ignore
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uint256 constant FROZEN_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFDFFFFFFFFFFFFFF; // prettier-ignore
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uint256 constant BORROWING_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFBFFFFFFFFFFFFFF; // prettier-ignore
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uint256 constant STABLE_BORROWING_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFFFFFFFFF; // prettier-ignore
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uint256 constant RESERVE_FACTOR_MASK = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF0000FFFFFFFFFFFFFFFF; // prettier-ignore
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/// @dev For the LTV, the start bit is 0 (up to 15), hence no bitshifting is needed
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uint256 constant LIQUIDATION_THRESHOLD_START_BIT_POSITION = 16;
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uint256 constant LIQUIDATION_BONUS_START_BIT_POSITION = 32;
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uint256 constant RESERVE_DECIMALS_START_BIT_POSITION = 48;
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uint256 constant IS_ACTIVE_START_BIT_POSITION = 56;
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uint256 constant IS_FROZEN_START_BIT_POSITION = 57;
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uint256 constant BORROWING_ENABLED_START_BIT_POSITION = 58;
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uint256 constant STABLE_BORROWING_ENABLED_START_BIT_POSITION = 59;
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uint256 constant RESERVE_FACTOR_START_BIT_POSITION = 64;
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uint256 constant MAX_VALID_LTV = 65535;
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uint256 constant MAX_VALID_LIQUIDATION_THRESHOLD = 65535;
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uint256 constant MAX_VALID_LIQUIDATION_BONUS = 65535;
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uint256 constant MAX_VALID_DECIMALS = 255;
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uint256 constant MAX_VALID_RESERVE_FACTOR = 65535;
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/**
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* @dev Sets the Loan to Value of the reserve
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* @param self The reserve configuration
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* @param ltv the new ltv
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**/
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function setLtv(DataTypes.ReserveConfigurationMap memory self, uint256 ltv) internal pure {
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require(ltv <= MAX_VALID_LTV, Errors.RC_INVALID_LTV);
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self.data = (self.data & LTV_MASK) | ltv;
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}
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/**
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* @dev Gets the Loan to Value of the reserve
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* @param self The reserve configuration
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* @return The loan to value
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**/
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function getLtv(DataTypes.ReserveConfigurationMap storage self) internal view returns (uint256) {
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return self.data & ~LTV_MASK;
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}
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/**
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* @dev Sets the liquidation threshold of the reserve
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* @param self The reserve configuration
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* @param threshold The new liquidation threshold
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**/
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function setLiquidationThreshold(DataTypes.ReserveConfigurationMap memory self, uint256 threshold)
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internal
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pure
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{
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require(threshold <= MAX_VALID_LIQUIDATION_THRESHOLD, Errors.RC_INVALID_LIQ_THRESHOLD);
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self.data =
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(self.data & LIQUIDATION_THRESHOLD_MASK) |
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(threshold << LIQUIDATION_THRESHOLD_START_BIT_POSITION);
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}
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/**
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* @dev Gets the liquidation threshold of the reserve
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* @param self The reserve configuration
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* @return The liquidation threshold
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**/
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function getLiquidationThreshold(DataTypes.ReserveConfigurationMap storage self)
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internal
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view
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returns (uint256)
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{
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return (self.data & ~LIQUIDATION_THRESHOLD_MASK) >> LIQUIDATION_THRESHOLD_START_BIT_POSITION;
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}
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/**
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* @dev Sets the liquidation bonus of the reserve
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* @param self The reserve configuration
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* @param bonus The new liquidation bonus
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**/
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function setLiquidationBonus(DataTypes.ReserveConfigurationMap memory self, uint256 bonus) internal pure {
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require(bonus <= MAX_VALID_LIQUIDATION_BONUS, Errors.RC_INVALID_LIQ_BONUS);
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self.data =
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(self.data & LIQUIDATION_BONUS_MASK) |
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(bonus << LIQUIDATION_BONUS_START_BIT_POSITION);
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}
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/**
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* @dev Gets the liquidation bonus of the reserve
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* @param self The reserve configuration
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* @return The liquidation bonus
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**/
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function getLiquidationBonus(DataTypes.ReserveConfigurationMap storage self)
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internal
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view
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returns (uint256)
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{
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return (self.data & ~LIQUIDATION_BONUS_MASK) >> LIQUIDATION_BONUS_START_BIT_POSITION;
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}
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/**
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* @dev Sets the decimals of the underlying asset of the reserve
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* @param self The reserve configuration
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* @param decimals The decimals
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**/
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function setDecimals(DataTypes.ReserveConfigurationMap memory self, uint256 decimals) internal pure {
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require(decimals <= MAX_VALID_DECIMALS, Errors.RC_INVALID_DECIMALS);
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self.data = (self.data & DECIMALS_MASK) | (decimals << RESERVE_DECIMALS_START_BIT_POSITION);
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}
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/**
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* @dev Gets the decimals of the underlying asset of the reserve
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* @param self The reserve configuration
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* @return The decimals of the asset
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**/
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function getDecimals(DataTypes.ReserveConfigurationMap storage self) internal view returns (uint256) {
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return (self.data & ~DECIMALS_MASK) >> RESERVE_DECIMALS_START_BIT_POSITION;
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}
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/**
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* @dev Sets the active state of the reserve
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* @param self The reserve configuration
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* @param active The active state
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**/
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function setActive(DataTypes.ReserveConfigurationMap memory self, bool active) internal pure {
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self.data =
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(self.data & ACTIVE_MASK) |
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(uint256(active ? 1 : 0) << IS_ACTIVE_START_BIT_POSITION);
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}
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/**
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* @dev Gets the active state of the reserve
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* @param self The reserve configuration
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* @return The active state
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**/
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function getActive(DataTypes.ReserveConfigurationMap storage self) internal view returns (bool) {
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return (self.data & ~ACTIVE_MASK) != 0;
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}
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/**
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* @dev Sets the frozen state of the reserve
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* @param self The reserve configuration
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* @param frozen The frozen state
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**/
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function setFrozen(DataTypes.ReserveConfigurationMap memory self, bool frozen) internal pure {
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self.data =
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(self.data & FROZEN_MASK) |
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(uint256(frozen ? 1 : 0) << IS_FROZEN_START_BIT_POSITION);
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}
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/**
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* @dev Gets the frozen state of the reserve
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* @param self The reserve configuration
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* @return The frozen state
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**/
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function getFrozen(DataTypes.ReserveConfigurationMap storage self) internal view returns (bool) {
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return (self.data & ~FROZEN_MASK) != 0;
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}
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/**
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* @dev Enables or disables borrowing on the reserve
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* @param self The reserve configuration
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* @param enabled True if the borrowing needs to be enabled, false otherwise
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**/
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function setBorrowingEnabled(DataTypes.ReserveConfigurationMap memory self, bool enabled) internal pure {
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self.data =
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(self.data & BORROWING_MASK) |
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(uint256(enabled ? 1 : 0) << BORROWING_ENABLED_START_BIT_POSITION);
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}
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/**
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* @dev Gets the borrowing state of the reserve
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* @param self The reserve configuration
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* @return The borrowing state
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**/
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function getBorrowingEnabled(DataTypes.ReserveConfigurationMap storage self) internal view returns (bool) {
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return (self.data & ~BORROWING_MASK) != 0;
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}
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/**
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* @dev Enables or disables stable rate borrowing on the reserve
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* @param self The reserve configuration
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* @param enabled True if the stable rate borrowing needs to be enabled, false otherwise
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**/
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function setStableRateBorrowingEnabled(DataTypes.ReserveConfigurationMap memory self, bool enabled)
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internal
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pure
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{
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self.data =
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(self.data & STABLE_BORROWING_MASK) |
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(uint256(enabled ? 1 : 0) << STABLE_BORROWING_ENABLED_START_BIT_POSITION);
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}
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/**
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* @dev Gets the stable rate borrowing state of the reserve
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* @param self The reserve configuration
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* @return The stable rate borrowing state
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**/
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function getStableRateBorrowingEnabled(DataTypes.ReserveConfigurationMap storage self)
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internal
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view
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returns (bool)
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{
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return (self.data & ~STABLE_BORROWING_MASK) != 0;
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}
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/**
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* @dev Sets the reserve factor of the reserve
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* @param self The reserve configuration
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* @param reserveFactor The reserve factor
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**/
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function setReserveFactor(DataTypes.ReserveConfigurationMap memory self, uint256 reserveFactor)
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internal
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pure
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{
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require(reserveFactor <= MAX_VALID_RESERVE_FACTOR, Errors.RC_INVALID_RESERVE_FACTOR);
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self.data =
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(self.data & RESERVE_FACTOR_MASK) |
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(reserveFactor << RESERVE_FACTOR_START_BIT_POSITION);
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}
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/**
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* @dev Gets the reserve factor of the reserve
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* @param self The reserve configuration
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* @return The reserve factor
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**/
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function getReserveFactor(DataTypes.ReserveConfigurationMap storage self) internal view returns (uint256) {
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return (self.data & ~RESERVE_FACTOR_MASK) >> RESERVE_FACTOR_START_BIT_POSITION;
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}
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/**
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* @dev Gets the configuration flags of the reserve
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* @param self The reserve configuration
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* @return The state flags representing active, frozen, borrowing enabled, stableRateBorrowing enabled
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**/
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function getFlags(DataTypes.ReserveConfigurationMap storage self)
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internal
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view
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returns (
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bool,
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bool,
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bool,
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bool
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)
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{
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uint256 dataLocal = self.data;
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return (
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(dataLocal & ~ACTIVE_MASK) != 0,
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(dataLocal & ~FROZEN_MASK) != 0,
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(dataLocal & ~BORROWING_MASK) != 0,
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(dataLocal & ~STABLE_BORROWING_MASK) != 0
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);
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}
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/**
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* @dev Gets the configuration paramters of the reserve
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* @param self The reserve configuration
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* @return The state params representing ltv, liquidation threshold, liquidation bonus, the reserve decimals
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**/
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function getParams(DataTypes.ReserveConfigurationMap storage self)
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internal
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view
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returns (
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uint256,
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uint256,
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uint256,
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uint256,
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uint256
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)
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{
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uint256 dataLocal = self.data;
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return (
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dataLocal & ~LTV_MASK,
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(dataLocal & ~LIQUIDATION_THRESHOLD_MASK) >> LIQUIDATION_THRESHOLD_START_BIT_POSITION,
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(dataLocal & ~LIQUIDATION_BONUS_MASK) >> LIQUIDATION_BONUS_START_BIT_POSITION,
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(dataLocal & ~DECIMALS_MASK) >> RESERVE_DECIMALS_START_BIT_POSITION,
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(dataLocal & ~RESERVE_FACTOR_MASK) >> RESERVE_FACTOR_START_BIT_POSITION
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);
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}
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/**
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* @dev Gets the configuration paramters of the reserve from a memory object
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* @param self The reserve configuration
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* @return The state params representing ltv, liquidation threshold, liquidation bonus, the reserve decimals
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**/
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function getParamsMemory(DataTypes.ReserveConfigurationMap memory self)
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internal
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pure
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returns (
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uint256,
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uint256,
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uint256,
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uint256,
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uint256
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)
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{
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return (
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self.data & ~LTV_MASK,
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(self.data & ~LIQUIDATION_THRESHOLD_MASK) >> LIQUIDATION_THRESHOLD_START_BIT_POSITION,
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(self.data & ~LIQUIDATION_BONUS_MASK) >> LIQUIDATION_BONUS_START_BIT_POSITION,
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(self.data & ~DECIMALS_MASK) >> RESERVE_DECIMALS_START_BIT_POSITION,
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(self.data & ~RESERVE_FACTOR_MASK) >> RESERVE_FACTOR_START_BIT_POSITION
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);
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}
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/**
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* @dev Gets the configuration flags of the reserve from a memory object
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* @param self The reserve configuration
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* @return The state flags representing active, frozen, borrowing enabled, stableRateBorrowing enabled
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**/
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function getFlagsMemory(DataTypes.ReserveConfigurationMap memory self)
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internal
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pure
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returns (
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bool,
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bool,
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bool,
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bool
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)
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{
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return (
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(self.data & ~ACTIVE_MASK) != 0,
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(self.data & ~FROZEN_MASK) != 0,
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(self.data & ~BORROWING_MASK) != 0,
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(self.data & ~STABLE_BORROWING_MASK) != 0
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);
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}
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}
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