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Contract Name:
ERC20Vault
Compiler Version
v0.8.17+commit.8df45f5f
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: GPL-3.0 pragma solidity 0.8.17; import '@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol'; import '@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol'; import '@openzeppelin/contracts-upgradeable/utils/structs/EnumerableSetUpgradeable.sol'; import '@openzeppelin/contracts-upgradeable/token/ERC20/utils/SafeERC20Upgradeable.sol'; import '../../interfaces/IStableCoin.sol'; import '../../interfaces/IStrategy.sol'; import '../../utils/RateLib.sol'; import {ERC20ValueProvider} from './ERC20ValueProvider.sol'; import {AbstractAssetVault} from './AbstractAssetVault.sol'; /// @title ERC20 lending vault /// @notice This contracts allows users to borrow ShezmuUSD using ERC20 tokens as collateral. /// The price of the collateral token is fetched using a chainlink oracle contract ERC20Vault is AbstractAssetVault { using SafeERC20Upgradeable for IERC20Upgradeable; using SafeERC20Upgradeable for IStableCoin; using EnumerableSetUpgradeable for EnumerableSetUpgradeable.AddressSet; using RateLib for RateLib.Rate; /// @notice The Shezmu trait boost locker contract address public valueProvider; IERC20Upgradeable public tokenContract; IStrategy public strategy; /// @notice This function is only called once during deployment of the proxy contract. It's not called after upgrades. /// @param _stablecoin ShezUSD address /// @param _tokenContract The collateral token address /// @param _valueProvider The collateral token value provider /// @param _settings Initial settings used by the contract function initialize( IStableCoin _stablecoin, IERC20Upgradeable _tokenContract, IStrategy _strategy, address _valueProvider, VaultSettings calldata _settings ) external virtual initializer { __initialize(_stablecoin, _settings); tokenContract = _tokenContract; valueProvider = _valueProvider; strategy = _strategy; } function setValueProvider( address _valueProvider ) external onlyRole(SETTER_ROLE) { valueProvider = _valueProvider; } /// @dev See {addCollateral} function _addCollateral( address _account, address _onBehalfOf, uint256 _colAmount ) internal override { if (_colAmount == 0) revert InvalidAmount(_colAmount); tokenContract.safeTransferFrom(_account, address(this), _colAmount); uint share = _colAmount; if (address(strategy) != address(0)) { tokenContract.safeApprove(address(strategy), _colAmount); share = strategy.deposit(_onBehalfOf, _colAmount); } Position storage position = positions[_onBehalfOf]; if (!userIndexes.contains(_onBehalfOf)) { userIndexes.add(_onBehalfOf); } position.collateral += share; emit CollateralAdded(_onBehalfOf, _colAmount); } /// @dev See {removeCollateral} function _removeCollateral( address _account, uint256 _colShare ) internal override { Position storage position = positions[_account]; uint256 _debtAmount = _getDebtAmount(_account); uint256 _creditLimit = _getCreditLimit( _account, position.collateral - _colShare ); if (_debtAmount > _creditLimit) revert InsufficientCollateral(); uint withdrawn = _colShare; if (address(strategy) != address(0)) { withdrawn = strategy.withdraw(_account, _colShare); } position.collateral -= _colShare; if (position.collateral == 0) { delete positions[_account]; userIndexes.remove(_account); } tokenContract.safeTransfer(_account, withdrawn); emit CollateralRemoved(_account, withdrawn); } /// @dev See {liquidate} function _liquidate( address _account, address _owner, address _recipient ) internal override { _checkRole(LIQUIDATOR_ROLE, _account); Position storage position = positions[_owner]; uint256 colAmount = position.collateral; uint256 debtAmount = _getDebtAmount(_owner); if (debtAmount < _getLiquidationLimit(_owner, position.collateral)) revert InvalidPosition(_owner); // burn all payment stablecoin.burnFrom(_account, debtAmount); // update debt portion totalDebtPortion -= position.debtPortion; totalDebtAmount -= debtAmount; position.debtPortion = 0; // transfer collateral to liquidator delete positions[_owner]; userIndexes.remove(_owner); tokenContract.safeTransfer(_recipient, colAmount); emit Liquidated(_account, _owner, colAmount); } /// @dev Returns the credit limit /// @param _owner The position owner /// @param _colAmount The collateral amount /// @return creditLimitUSD The credit limit function _getCreditLimit( address _owner, uint256 _colAmount ) internal view virtual override returns (uint256 creditLimitUSD) { uint _uAmount = _colAmount; if (address(strategy) != address(0)) { _uAmount = strategy.toAmount(_colAmount); } creditLimitUSD = ERC20ValueProvider(valueProvider).getCreditLimitUSD( _owner, _uAmount ); } /// @dev Returns the minimum amount of debt necessary to liquidate the position /// @param _owner The position owner /// @param _colAmount The collateral amount /// @return liquidationLimitUSD The minimum amount of debt to liquidate the position function _getLiquidationLimit( address _owner, uint256 _colAmount ) internal view virtual override returns (uint256 liquidationLimitUSD) { uint _uAmount = _colAmount; if (address(strategy) != address(0)) { _uAmount = strategy.toAmount(_colAmount); } liquidationLimitUSD = ERC20ValueProvider(valueProvider) .getLiquidationLimitUSD(_owner, _uAmount); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (access/AccessControl.sol) pragma solidity ^0.8.0; import "./IAccessControlUpgradeable.sol"; import "../utils/ContextUpgradeable.sol"; import "../utils/StringsUpgradeable.sol"; import "../utils/introspection/ERC165Upgradeable.sol"; import "../proxy/utils/Initializable.sol"; /** * @dev Contract module that allows children to implement role-based access * control mechanisms. This is a lightweight version that doesn't allow enumerating role * members except through off-chain means by accessing the contract event logs. Some * applications may benefit from on-chain enumerability, for those cases see * {AccessControlEnumerable}. * * Roles are referred to by their `bytes32` identifier. These should be exposed * in the external API and be unique. The best way to achieve this is by * using `public constant` hash digests: * * ```solidity * bytes32 public constant MY_ROLE = keccak256("MY_ROLE"); * ``` * * Roles can be used to represent a set of permissions. To restrict access to a * function call, use {hasRole}: * * ```solidity * function foo() public { * require(hasRole(MY_ROLE, msg.sender)); * ... * } * ``` * * Roles can be granted and revoked dynamically via the {grantRole} and * {revokeRole} functions. Each role has an associated admin role, and only * accounts that have a role's admin role can call {grantRole} and {revokeRole}. * * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means * that only accounts with this role will be able to grant or revoke other * roles. More complex role relationships can be created by using * {_setRoleAdmin}. * * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to * grant and revoke this role. Extra precautions should be taken to secure * accounts that have been granted it. We recommend using {AccessControlDefaultAdminRules} * to enforce additional security measures for this role. */ abstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControlUpgradeable, ERC165Upgradeable { function __AccessControl_init() internal onlyInitializing { } function __AccessControl_init_unchained() internal onlyInitializing { } struct RoleData { mapping(address => bool) members; bytes32 adminRole; } mapping(bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Modifier that checks that an account has a specific role. Reverts * with a standardized message including the required role. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ * * _Available since v4.1._ */ modifier onlyRole(bytes32 role) { _checkRole(role); _; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IAccessControlUpgradeable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) public view virtual override returns (bool) { return _roles[role].members[account]; } /** * @dev Revert with a standard message if `_msgSender()` is missing `role`. * Overriding this function changes the behavior of the {onlyRole} modifier. * * Format of the revert message is described in {_checkRole}. * * _Available since v4.6._ */ function _checkRole(bytes32 role) internal view virtual { _checkRole(role, _msgSender()); } /** * @dev Revert with a standard message if `account` is missing `role`. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ */ function _checkRole(bytes32 role, address account) internal view virtual { if (!hasRole(role, account)) { revert( string( abi.encodePacked( "AccessControl: account ", StringsUpgradeable.toHexString(account), " is missing role ", StringsUpgradeable.toHexString(uint256(role), 32) ) ) ); } } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. * * May emit a {RoleGranted} event. */ function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. * * May emit a {RoleRevoked} event. */ function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) { _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been revoked `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. * * May emit a {RoleRevoked} event. */ function renounceRole(bytes32 role, address account) public virtual override { require(account == _msgSender(), "AccessControl: can only renounce roles for self"); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * May emit a {RoleGranted} event. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== * * NOTE: This function is deprecated in favor of {_grantRole}. */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { bytes32 previousAdminRole = getRoleAdmin(role); _roles[role].adminRole = adminRole; emit RoleAdminChanged(role, previousAdminRole, adminRole); } /** * @dev Grants `role` to `account`. * * Internal function without access restriction. * * May emit a {RoleGranted} event. */ function _grantRole(bytes32 role, address account) internal virtual { if (!hasRole(role, account)) { _roles[role].members[account] = true; emit RoleGranted(role, account, _msgSender()); } } /** * @dev Revokes `role` from `account`. * * Internal function without access restriction. * * May emit a {RoleRevoked} event. */ function _revokeRole(bytes32 role, address account) internal virtual { if (hasRole(role, account)) { _roles[role].members[account] = false; emit RoleRevoked(role, account, _msgSender()); } } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol) pragma solidity ^0.8.0; /** * @dev External interface of AccessControl declared to support ERC165 detection. */ interface IAccessControlUpgradeable { /** * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole` * * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite * {RoleAdminChanged} not being emitted signaling this. * * _Available since v3.1._ */ event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole); /** * @dev Emitted when `account` is granted `role`. * * `sender` is the account that originated the contract call, an admin role * bearer except when using {AccessControl-_setupRole}. */ event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Emitted when `account` is revoked `role`. * * `sender` is the account that originated the contract call: * - if using `revokeRole`, it is the admin role bearer * - if using `renounceRole`, it is the role bearer (i.e. `account`) */ event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender); /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole(bytes32 role, address account) external view returns (bool); /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {AccessControl-_setRoleAdmin}. */ function getRoleAdmin(bytes32 role) external view returns (bytes32); /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole(bytes32 role, address account) external; /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole(bytes32 role, address account) external; /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been granted `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole(bytes32 role, address account) external; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol) pragma solidity ^0.8.2; import "../../utils/AddressUpgradeable.sol"; /** * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect. * * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be * reused. This mechanism prevents re-execution of each "step" but allows the creation of new initialization steps in * case an upgrade adds a module that needs to be initialized. * * For example: * * [.hljs-theme-light.nopadding] * ```solidity * contract MyToken is ERC20Upgradeable { * function initialize() initializer public { * __ERC20_init("MyToken", "MTK"); * } * } * * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable { * function initializeV2() reinitializer(2) public { * __ERC20Permit_init("MyToken"); * } * } * ``` * * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}. * * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity. * * [CAUTION] * ==== * Avoid leaving a contract uninitialized. * * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed: * * [.hljs-theme-light.nopadding] * ``` * /// @custom:oz-upgrades-unsafe-allow constructor * constructor() { * _disableInitializers(); * } * ``` * ==== */ abstract contract Initializable { /** * @dev Indicates that the contract has been initialized. * @custom:oz-retyped-from bool */ uint8 private _initialized; /** * @dev Indicates that the contract is in the process of being initialized. */ bool private _initializing; /** * @dev Triggered when the contract has been initialized or reinitialized. */ event Initialized(uint8 version); /** * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope, * `onlyInitializing` functions can be used to initialize parent contracts. * * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a * constructor. * * Emits an {Initialized} event. */ modifier initializer() { bool isTopLevelCall = !_initializing; require( (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1), "Initializable: contract is already initialized" ); _initialized = 1; if (isTopLevelCall) { _initializing = true; } _; if (isTopLevelCall) { _initializing = false; emit Initialized(1); } } /** * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be * used to initialize parent contracts. * * A reinitializer may be used after the original initialization step. This is essential to configure modules that * are added through upgrades and that require initialization. * * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer` * cannot be nested. If one is invoked in the context of another, execution will revert. * * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in * a contract, executing them in the right order is up to the developer or operator. * * WARNING: setting the version to 255 will prevent any future reinitialization. * * Emits an {Initialized} event. */ modifier reinitializer(uint8 version) { require(!_initializing && _initialized < version, "Initializable: contract is already initialized"); _initialized = version; _initializing = true; _; _initializing = false; emit Initialized(version); } /** * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the * {initializer} and {reinitializer} modifiers, directly or indirectly. */ modifier onlyInitializing() { require(_initializing, "Initializable: contract is not initializing"); _; } /** * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call. * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized * to any version. It is recommended to use this to lock implementation contracts that are designed to be called * through proxies. * * Emits an {Initialized} event the first time it is successfully executed. */ function _disableInitializers() internal virtual { require(!_initializing, "Initializable: contract is initializing"); if (_initialized != type(uint8).max) { _initialized = type(uint8).max; emit Initialized(type(uint8).max); } } /** * @dev Returns the highest version that has been initialized. See {reinitializer}. */ function _getInitializedVersion() internal view returns (uint8) { return _initialized; } /** * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}. */ function _isInitializing() internal view returns (bool) { return _initializing; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (security/ReentrancyGuard.sol) pragma solidity ^0.8.0; import "../proxy/utils/Initializable.sol"; /** * @dev Contract module that helps prevent reentrant calls to a function. * * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier * available, which can be applied to functions to make sure there are no nested * (reentrant) calls to them. * * Note that because there is a single `nonReentrant` guard, functions marked as * `nonReentrant` may not call one another. This can be worked around by making * those functions `private`, and then adding `external` `nonReentrant` entry * points to them. * * TIP: If you would like to learn more about reentrancy and alternative ways * to protect against it, check out our blog post * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul]. */ abstract contract ReentrancyGuardUpgradeable is Initializable { // Booleans are more expensive than uint256 or any type that takes up a full // word because each write operation emits an extra SLOAD to first read the // slot's contents, replace the bits taken up by the boolean, and then write // back. This is the compiler's defense against contract upgrades and // pointer aliasing, and it cannot be disabled. // The values being non-zero value makes deployment a bit more expensive, // but in exchange the refund on every call to nonReentrant will be lower in // amount. Since refunds are capped to a percentage of the total // transaction's gas, it is best to keep them low in cases like this one, to // increase the likelihood of the full refund coming into effect. uint256 private constant _NOT_ENTERED = 1; uint256 private constant _ENTERED = 2; uint256 private _status; function __ReentrancyGuard_init() internal onlyInitializing { __ReentrancyGuard_init_unchained(); } function __ReentrancyGuard_init_unchained() internal onlyInitializing { _status = _NOT_ENTERED; } /** * @dev Prevents a contract from calling itself, directly or indirectly. * Calling a `nonReentrant` function from another `nonReentrant` * function is not supported. It is possible to prevent this from happening * by making the `nonReentrant` function external, and making it call a * `private` function that does the actual work. */ modifier nonReentrant() { _nonReentrantBefore(); _; _nonReentrantAfter(); } function _nonReentrantBefore() private { // On the first call to nonReentrant, _status will be _NOT_ENTERED require(_status != _ENTERED, "ReentrancyGuard: reentrant call"); // Any calls to nonReentrant after this point will fail _status = _ENTERED; } function _nonReentrantAfter() private { // By storing the original value once again, a refund is triggered (see // https://eips.ethereum.org/EIPS/eip-2200) _status = _NOT_ENTERED; } /** * @dev Returns true if the reentrancy guard is currently set to "entered", which indicates there is a * `nonReentrant` function in the call stack. */ function _reentrancyGuardEntered() internal view returns (bool) { return _status == _ENTERED; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol) pragma solidity ^0.8.0; import "../IERC20Upgradeable.sol"; /** * @dev Interface for the optional metadata functions from the ERC20 standard. * * _Available since v4.1._ */ interface IERC20MetadataUpgradeable is IERC20Upgradeable { /** * @dev Returns the name of the token. */ function name() external view returns (string memory); /** * @dev Returns the symbol of the token. */ function symbol() external view returns (string memory); /** * @dev Returns the decimals places of the token. */ function decimals() external view returns (uint8); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/IERC20Permit.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612]. * * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't * need to send a transaction, and thus is not required to hold Ether at all. */ interface IERC20PermitUpgradeable { /** * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens, * given ``owner``'s signed approval. * * IMPORTANT: The same issues {IERC20-approve} has related to transaction * ordering also apply here. * * Emits an {Approval} event. * * Requirements: * * - `spender` cannot be the zero address. * - `deadline` must be a timestamp in the future. * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner` * over the EIP712-formatted function arguments. * - the signature must use ``owner``'s current nonce (see {nonces}). * * For more information on the signature format, see the * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP * section]. */ function permit( address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) external; /** * @dev Returns the current nonce for `owner`. This value must be * included whenever a signature is generated for {permit}. * * Every successful call to {permit} increases ``owner``'s nonce by one. This * prevents a signature from being used multiple times. */ function nonces(address owner) external view returns (uint256); /** * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}. */ // solhint-disable-next-line func-name-mixedcase function DOMAIN_SEPARATOR() external view returns (bytes32); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/IERC20.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC20 standard as defined in the EIP. */ interface IERC20Upgradeable { /** * @dev Emitted when `value` tokens are moved from one account (`from`) to * another (`to`). * * Note that `value` may be zero. */ event Transfer(address indexed from, address indexed to, uint256 value); /** * @dev Emitted when the allowance of a `spender` for an `owner` is set by * a call to {approve}. `value` is the new allowance. */ event Approval(address indexed owner, address indexed spender, uint256 value); /** * @dev Returns the amount of tokens in existence. */ function totalSupply() external view returns (uint256); /** * @dev Returns the amount of tokens owned by `account`. */ function balanceOf(address account) external view returns (uint256); /** * @dev Moves `amount` tokens from the caller's account to `to`. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transfer(address to, uint256 amount) external returns (bool); /** * @dev Returns the remaining number of tokens that `spender` will be * allowed to spend on behalf of `owner` through {transferFrom}. This is * zero by default. * * This value changes when {approve} or {transferFrom} are called. */ function allowance(address owner, address spender) external view returns (uint256); /** * @dev Sets `amount` as the allowance of `spender` over the caller's tokens. * * Returns a boolean value indicating whether the operation succeeded. * * IMPORTANT: Beware that changing an allowance with this method brings the risk * that someone may use both the old and the new allowance by unfortunate * transaction ordering. One possible solution to mitigate this race * condition is to first reduce the spender's allowance to 0 and set the * desired value afterwards: * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * * Emits an {Approval} event. */ function approve(address spender, uint256 amount) external returns (bool); /** * @dev Moves `amount` tokens from `from` to `to` using the * allowance mechanism. `amount` is then deducted from the caller's * allowance. * * Returns a boolean value indicating whether the operation succeeded. * * Emits a {Transfer} event. */ function transferFrom(address from, address to, uint256 amount) external returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/utils/SafeERC20.sol) pragma solidity ^0.8.0; import "../IERC20Upgradeable.sol"; import "../extensions/IERC20PermitUpgradeable.sol"; import "../../../utils/AddressUpgradeable.sol"; /** * @title SafeERC20 * @dev Wrappers around ERC20 operations that throw on failure (when the token * contract returns false). Tokens that return no value (and instead revert or * throw on failure) are also supported, non-reverting calls are assumed to be * successful. * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract, * which allows you to call the safe operations as `token.safeTransfer(...)`, etc. */ library SafeERC20Upgradeable { using AddressUpgradeable for address; /** * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeTransfer(IERC20Upgradeable token, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value)); } /** * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful. */ function safeTransferFrom(IERC20Upgradeable token, address from, address to, uint256 value) internal { _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value)); } /** * @dev Deprecated. This function has issues similar to the ones found in * {IERC20-approve}, and its usage is discouraged. * * Whenever possible, use {safeIncreaseAllowance} and * {safeDecreaseAllowance} instead. */ function safeApprove(IERC20Upgradeable token, address spender, uint256 value) internal { // safeApprove should only be called when setting an initial allowance, // or when resetting it to zero. To increase and decrease it, use // 'safeIncreaseAllowance' and 'safeDecreaseAllowance' require( (value == 0) || (token.allowance(address(this), spender) == 0), "SafeERC20: approve from non-zero to non-zero allowance" ); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value)); } /** * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeIncreaseAllowance(IERC20Upgradeable token, address spender, uint256 value) internal { uint256 oldAllowance = token.allowance(address(this), spender); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value)); } /** * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. */ function safeDecreaseAllowance(IERC20Upgradeable token, address spender, uint256 value) internal { unchecked { uint256 oldAllowance = token.allowance(address(this), spender); require(oldAllowance >= value, "SafeERC20: decreased allowance below zero"); _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value)); } } /** * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value, * non-reverting calls are assumed to be successful. Compatible with tokens that require the approval to be set to * 0 before setting it to a non-zero value. */ function forceApprove(IERC20Upgradeable token, address spender, uint256 value) internal { bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value); if (!_callOptionalReturnBool(token, approvalCall)) { _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0)); _callOptionalReturn(token, approvalCall); } } /** * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`. * Revert on invalid signature. */ function safePermit( IERC20PermitUpgradeable token, address owner, address spender, uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s ) internal { uint256 nonceBefore = token.nonces(owner); token.permit(owner, spender, value, deadline, v, r, s); uint256 nonceAfter = token.nonces(owner); require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed"); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). */ function _callOptionalReturn(IERC20Upgradeable token, bytes memory data) private { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that // the target address contains contract code and also asserts for success in the low-level call. bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed"); require(returndata.length == 0 || abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed"); } /** * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement * on the return value: the return value is optional (but if data is returned, it must not be false). * @param token The token targeted by the call. * @param data The call data (encoded using abi.encode or one of its variants). * * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead. */ function _callOptionalReturnBool(IERC20Upgradeable token, bytes memory data) private returns (bool) { // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since // we're implementing it ourselves. We cannot use {Address-functionCall} here since this should return false // and not revert is the subcall reverts. (bool success, bytes memory returndata) = address(token).call(data); return success && (returndata.length == 0 || abi.decode(returndata, (bool))) && AddressUpgradeable.isContract(address(token)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol) pragma solidity ^0.8.1; /** * @dev Collection of functions related to the address type */ library AddressUpgradeable { /** * @dev Returns true if `account` is a contract. * * [IMPORTANT] * ==== * It is unsafe to assume that an address for which this function returns * false is an externally-owned account (EOA) and not a contract. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * * Furthermore, `isContract` will also return true if the target contract within * the same transaction is already scheduled for destruction by `SELFDESTRUCT`, * which only has an effect at the end of a transaction. * ==== * * [IMPORTANT] * ==== * You shouldn't rely on `isContract` to protect against flash loan attacks! * * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract * constructor. * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize/address.code.length, which returns 0 // for contracts in construction, since the code is only stored at the end // of the constructor execution. return account.code.length > 0; } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.8.0/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); (bool success, ) = recipient.call{value: amount}(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain `call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue( address target, bytes memory data, uint256 value, string memory errorMessage ) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); (bool success, bytes memory returndata) = target.call{value: value}(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall( address target, bytes memory data, string memory errorMessage ) internal view returns (bytes memory) { (bool success, bytes memory returndata) = target.staticcall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall( address target, bytes memory data, string memory errorMessage ) internal returns (bytes memory) { (bool success, bytes memory returndata) = target.delegatecall(data); return verifyCallResultFromTarget(target, success, returndata, errorMessage); } /** * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract. * * _Available since v4.8._ */ function verifyCallResultFromTarget( address target, bool success, bytes memory returndata, string memory errorMessage ) internal view returns (bytes memory) { if (success) { if (returndata.length == 0) { // only check isContract if the call was successful and the return data is empty // otherwise we already know that it was a contract require(isContract(target), "Address: call to non-contract"); } return returndata; } else { _revert(returndata, errorMessage); } } /** * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the * revert reason or using the provided one. * * _Available since v4.3._ */ function verifyCallResult( bool success, bytes memory returndata, string memory errorMessage ) internal pure returns (bytes memory) { if (success) { return returndata; } else { _revert(returndata, errorMessage); } } function _revert(bytes memory returndata, string memory errorMessage) private pure { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly /// @solidity memory-safe-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/Context.sol) pragma solidity ^0.8.0; import "../proxy/utils/Initializable.sol"; /** * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract ContextUpgradeable is Initializable { function __Context_init() internal onlyInitializing { } function __Context_init_unchained() internal onlyInitializing { } function _msgSender() internal view virtual returns (address) { return msg.sender; } function _msgData() internal view virtual returns (bytes calldata) { return msg.data; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165Upgradeable.sol"; import "../../proxy/utils/Initializable.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165Upgradeable is Initializable, IERC165Upgradeable { function __ERC165_init() internal onlyInitializing { } function __ERC165_init_unchained() internal onlyInitializing { } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165Upgradeable).interfaceId; } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[50] private __gap; }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165Upgradeable { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol) pragma solidity ^0.8.0; /** * @dev Standard math utilities missing in the Solidity language. */ library MathUpgradeable { enum Rounding { Down, // Toward negative infinity Up, // Toward infinity Zero // Toward zero } /** * @dev Returns the largest of two numbers. */ function max(uint256 a, uint256 b) internal pure returns (uint256) { return a > b ? a : b; } /** * @dev Returns the smallest of two numbers. */ function min(uint256 a, uint256 b) internal pure returns (uint256) { return a < b ? a : b; } /** * @dev Returns the average of two numbers. The result is rounded towards * zero. */ function average(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b) / 2 can overflow. return (a & b) + (a ^ b) / 2; } /** * @dev Returns the ceiling of the division of two numbers. * * This differs from standard division with `/` in that it rounds up instead * of rounding down. */ function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) { // (a + b - 1) / b can overflow on addition, so we distribute. return a == 0 ? 0 : (a - 1) / b + 1; } /** * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0 * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) * with further edits by Uniswap Labs also under MIT license. */ function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) { unchecked { // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256 // variables such that product = prod1 * 2^256 + prod0. uint256 prod0; // Least significant 256 bits of the product uint256 prod1; // Most significant 256 bits of the product assembly { let mm := mulmod(x, y, not(0)) prod0 := mul(x, y) prod1 := sub(sub(mm, prod0), lt(mm, prod0)) } // Handle non-overflow cases, 256 by 256 division. if (prod1 == 0) { // Solidity will revert if denominator == 0, unlike the div opcode on its own. // The surrounding unchecked block does not change this fact. // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic. return prod0 / denominator; } // Make sure the result is less than 2^256. Also prevents denominator == 0. require(denominator > prod1, "Math: mulDiv overflow"); /////////////////////////////////////////////// // 512 by 256 division. /////////////////////////////////////////////// // Make division exact by subtracting the remainder from [prod1 prod0]. uint256 remainder; assembly { // Compute remainder using mulmod. remainder := mulmod(x, y, denominator) // Subtract 256 bit number from 512 bit number. prod1 := sub(prod1, gt(remainder, prod0)) prod0 := sub(prod0, remainder) } // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1. // See https://cs.stackexchange.com/q/138556/92363. // Does not overflow because the denominator cannot be zero at this stage in the function. uint256 twos = denominator & (~denominator + 1); assembly { // Divide denominator by twos. denominator := div(denominator, twos) // Divide [prod1 prod0] by twos. prod0 := div(prod0, twos) // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one. twos := add(div(sub(0, twos), twos), 1) } // Shift in bits from prod1 into prod0. prod0 |= prod1 * twos; // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for // four bits. That is, denominator * inv = 1 mod 2^4. uint256 inverse = (3 * denominator) ^ 2; // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works // in modular arithmetic, doubling the correct bits in each step. inverse *= 2 - denominator * inverse; // inverse mod 2^8 inverse *= 2 - denominator * inverse; // inverse mod 2^16 inverse *= 2 - denominator * inverse; // inverse mod 2^32 inverse *= 2 - denominator * inverse; // inverse mod 2^64 inverse *= 2 - denominator * inverse; // inverse mod 2^128 inverse *= 2 - denominator * inverse; // inverse mod 2^256 // Because the division is now exact we can divide by multiplying with the modular inverse of denominator. // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1 // is no longer required. result = prod0 * inverse; return result; } } /** * @notice Calculates x * y / denominator with full precision, following the selected rounding direction. */ function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) { uint256 result = mulDiv(x, y, denominator); if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) { result += 1; } return result; } /** * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded down. * * Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11). */ function sqrt(uint256 a) internal pure returns (uint256) { if (a == 0) { return 0; } // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target. // // We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have // `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`. // // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)` // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))` // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)` // // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit. uint256 result = 1 << (log2(a) >> 1); // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128, // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision // into the expected uint128 result. unchecked { result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; result = (result + a / result) >> 1; return min(result, a / result); } } /** * @notice Calculates sqrt(a), following the selected rounding direction. */ function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = sqrt(a); return result + (rounding == Rounding.Up && result * result < a ? 1 : 0); } } /** * @dev Return the log in base 2, rounded down, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 128; } if (value >> 64 > 0) { value >>= 64; result += 64; } if (value >> 32 > 0) { value >>= 32; result += 32; } if (value >> 16 > 0) { value >>= 16; result += 16; } if (value >> 8 > 0) { value >>= 8; result += 8; } if (value >> 4 > 0) { value >>= 4; result += 4; } if (value >> 2 > 0) { value >>= 2; result += 2; } if (value >> 1 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 2, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log2(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log2(value); return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0); } } /** * @dev Return the log in base 10, rounded down, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >= 10 ** 64) { value /= 10 ** 64; result += 64; } if (value >= 10 ** 32) { value /= 10 ** 32; result += 32; } if (value >= 10 ** 16) { value /= 10 ** 16; result += 16; } if (value >= 10 ** 8) { value /= 10 ** 8; result += 8; } if (value >= 10 ** 4) { value /= 10 ** 4; result += 4; } if (value >= 10 ** 2) { value /= 10 ** 2; result += 2; } if (value >= 10 ** 1) { result += 1; } } return result; } /** * @dev Return the log in base 10, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log10(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log10(value); return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0); } } /** * @dev Return the log in base 256, rounded down, of a positive value. * Returns 0 if given 0. * * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string. */ function log256(uint256 value) internal pure returns (uint256) { uint256 result = 0; unchecked { if (value >> 128 > 0) { value >>= 128; result += 16; } if (value >> 64 > 0) { value >>= 64; result += 8; } if (value >> 32 > 0) { value >>= 32; result += 4; } if (value >> 16 > 0) { value >>= 16; result += 2; } if (value >> 8 > 0) { result += 1; } } return result; } /** * @dev Return the log in base 256, following the selected rounding direction, of a positive value. * Returns 0 if given 0. */ function log256(uint256 value, Rounding rounding) internal pure returns (uint256) { unchecked { uint256 result = log256(value); return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol) pragma solidity ^0.8.0; /** * @dev Standard signed math utilities missing in the Solidity language. */ library SignedMathUpgradeable { /** * @dev Returns the largest of two signed numbers. */ function max(int256 a, int256 b) internal pure returns (int256) { return a > b ? a : b; } /** * @dev Returns the smallest of two signed numbers. */ function min(int256 a, int256 b) internal pure returns (int256) { return a < b ? a : b; } /** * @dev Returns the average of two signed numbers without overflow. * The result is rounded towards zero. */ function average(int256 a, int256 b) internal pure returns (int256) { // Formula from the book "Hacker's Delight" int256 x = (a & b) + ((a ^ b) >> 1); return x + (int256(uint256(x) >> 255) & (a ^ b)); } /** * @dev Returns the absolute unsigned value of a signed value. */ function abs(int256 n) internal pure returns (uint256) { unchecked { // must be unchecked in order to support `n = type(int256).min` return uint256(n >= 0 ? n : -n); } } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol) pragma solidity ^0.8.0; import "./math/MathUpgradeable.sol"; import "./math/SignedMathUpgradeable.sol"; /** * @dev String operations. */ library StringsUpgradeable { bytes16 private constant _SYMBOLS = "0123456789abcdef"; uint8 private constant _ADDRESS_LENGTH = 20; /** * @dev Converts a `uint256` to its ASCII `string` decimal representation. */ function toString(uint256 value) internal pure returns (string memory) { unchecked { uint256 length = MathUpgradeable.log10(value) + 1; string memory buffer = new string(length); uint256 ptr; /// @solidity memory-safe-assembly assembly { ptr := add(buffer, add(32, length)) } while (true) { ptr--; /// @solidity memory-safe-assembly assembly { mstore8(ptr, byte(mod(value, 10), _SYMBOLS)) } value /= 10; if (value == 0) break; } return buffer; } } /** * @dev Converts a `int256` to its ASCII `string` decimal representation. */ function toString(int256 value) internal pure returns (string memory) { return string(abi.encodePacked(value < 0 ? "-" : "", toString(SignedMathUpgradeable.abs(value)))); } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation. */ function toHexString(uint256 value) internal pure returns (string memory) { unchecked { return toHexString(value, MathUpgradeable.log256(value) + 1); } } /** * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length. */ function toHexString(uint256 value, uint256 length) internal pure returns (string memory) { bytes memory buffer = new bytes(2 * length + 2); buffer[0] = "0"; buffer[1] = "x"; for (uint256 i = 2 * length + 1; i > 1; --i) { buffer[i] = _SYMBOLS[value & 0xf]; value >>= 4; } require(value == 0, "Strings: hex length insufficient"); return string(buffer); } /** * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation. */ function toHexString(address addr) internal pure returns (string memory) { return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH); } /** * @dev Returns true if the two strings are equal. */ function equal(string memory a, string memory b) internal pure returns (bool) { return keccak256(bytes(a)) == keccak256(bytes(b)); } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts (last updated v4.9.0) (utils/structs/EnumerableSet.sol) // This file was procedurally generated from scripts/generate/templates/EnumerableSet.js. pragma solidity ^0.8.0; /** * @dev Library for managing * https://en.wikipedia.org/wiki/Set_(abstract_data_type)[sets] of primitive * types. * * Sets have the following properties: * * - Elements are added, removed, and checked for existence in constant time * (O(1)). * - Elements are enumerated in O(n). No guarantees are made on the ordering. * * ```solidity * contract Example { * // Add the library methods * using EnumerableSet for EnumerableSet.AddressSet; * * // Declare a set state variable * EnumerableSet.AddressSet private mySet; * } * ``` * * As of v3.3.0, sets of type `bytes32` (`Bytes32Set`), `address` (`AddressSet`) * and `uint256` (`UintSet`) are supported. * * [WARNING] * ==== * Trying to delete such a structure from storage will likely result in data corruption, rendering the structure * unusable. * See https://github.com/ethereum/solidity/pull/11843[ethereum/solidity#11843] for more info. * * In order to clean an EnumerableSet, you can either remove all elements one by one or create a fresh instance using an * array of EnumerableSet. * ==== */ library EnumerableSetUpgradeable { // To implement this library for multiple types with as little code // repetition as possible, we write it in terms of a generic Set type with // bytes32 values. // The Set implementation uses private functions, and user-facing // implementations (such as AddressSet) are just wrappers around the // underlying Set. // This means that we can only create new EnumerableSets for types that fit // in bytes32. struct Set { // Storage of set values bytes32[] _values; // Position of the value in the `values` array, plus 1 because index 0 // means a value is not in the set. mapping(bytes32 => uint256) _indexes; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function _add(Set storage set, bytes32 value) private returns (bool) { if (!_contains(set, value)) { set._values.push(value); // The value is stored at length-1, but we add 1 to all indexes // and use 0 as a sentinel value set._indexes[value] = set._values.length; return true; } else { return false; } } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function _remove(Set storage set, bytes32 value) private returns (bool) { // We read and store the value's index to prevent multiple reads from the same storage slot uint256 valueIndex = set._indexes[value]; if (valueIndex != 0) { // Equivalent to contains(set, value) // To delete an element from the _values array in O(1), we swap the element to delete with the last one in // the array, and then remove the last element (sometimes called as 'swap and pop'). // This modifies the order of the array, as noted in {at}. uint256 toDeleteIndex = valueIndex - 1; uint256 lastIndex = set._values.length - 1; if (lastIndex != toDeleteIndex) { bytes32 lastValue = set._values[lastIndex]; // Move the last value to the index where the value to delete is set._values[toDeleteIndex] = lastValue; // Update the index for the moved value set._indexes[lastValue] = valueIndex; // Replace lastValue's index to valueIndex } // Delete the slot where the moved value was stored set._values.pop(); // Delete the index for the deleted slot delete set._indexes[value]; return true; } else { return false; } } /** * @dev Returns true if the value is in the set. O(1). */ function _contains(Set storage set, bytes32 value) private view returns (bool) { return set._indexes[value] != 0; } /** * @dev Returns the number of values on the set. O(1). */ function _length(Set storage set) private view returns (uint256) { return set._values.length; } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function _at(Set storage set, uint256 index) private view returns (bytes32) { return set._values[index]; } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function _values(Set storage set) private view returns (bytes32[] memory) { return set._values; } // Bytes32Set struct Bytes32Set { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _add(set._inner, value); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(Bytes32Set storage set, bytes32 value) internal returns (bool) { return _remove(set._inner, value); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(Bytes32Set storage set, bytes32 value) internal view returns (bool) { return _contains(set._inner, value); } /** * @dev Returns the number of values in the set. O(1). */ function length(Bytes32Set storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(Bytes32Set storage set, uint256 index) internal view returns (bytes32) { return _at(set._inner, index); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(Bytes32Set storage set) internal view returns (bytes32[] memory) { bytes32[] memory store = _values(set._inner); bytes32[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } // AddressSet struct AddressSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(AddressSet storage set, address value) internal returns (bool) { return _add(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(AddressSet storage set, address value) internal returns (bool) { return _remove(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(AddressSet storage set, address value) internal view returns (bool) { return _contains(set._inner, bytes32(uint256(uint160(value)))); } /** * @dev Returns the number of values in the set. O(1). */ function length(AddressSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(AddressSet storage set, uint256 index) internal view returns (address) { return address(uint160(uint256(_at(set._inner, index)))); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(AddressSet storage set) internal view returns (address[] memory) { bytes32[] memory store = _values(set._inner); address[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } // UintSet struct UintSet { Set _inner; } /** * @dev Add a value to a set. O(1). * * Returns true if the value was added to the set, that is if it was not * already present. */ function add(UintSet storage set, uint256 value) internal returns (bool) { return _add(set._inner, bytes32(value)); } /** * @dev Removes a value from a set. O(1). * * Returns true if the value was removed from the set, that is if it was * present. */ function remove(UintSet storage set, uint256 value) internal returns (bool) { return _remove(set._inner, bytes32(value)); } /** * @dev Returns true if the value is in the set. O(1). */ function contains(UintSet storage set, uint256 value) internal view returns (bool) { return _contains(set._inner, bytes32(value)); } /** * @dev Returns the number of values in the set. O(1). */ function length(UintSet storage set) internal view returns (uint256) { return _length(set._inner); } /** * @dev Returns the value stored at position `index` in the set. O(1). * * Note that there are no guarantees on the ordering of values inside the * array, and it may change when more values are added or removed. * * Requirements: * * - `index` must be strictly less than {length}. */ function at(UintSet storage set, uint256 index) internal view returns (uint256) { return uint256(_at(set._inner, index)); } /** * @dev Return the entire set in an array * * WARNING: This operation will copy the entire storage to memory, which can be quite expensive. This is designed * to mostly be used by view accessors that are queried without any gas fees. Developers should keep in mind that * this function has an unbounded cost, and using it as part of a state-changing function may render the function * uncallable if the set grows to a point where copying to memory consumes too much gas to fit in a block. */ function values(UintSet storage set) internal view returns (uint256[] memory) { bytes32[] memory store = _values(set._inner); uint256[] memory result; /// @solidity memory-safe-assembly assembly { result := store } return result; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol) pragma solidity ^0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check * for the additional interface id that will be supported. For example: * * ```solidity * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId); * } * ``` * * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation. */ abstract contract ERC165 is IERC165 { /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) { return interfaceId == type(IERC165).interfaceId; } }
// SPDX-License-Identifier: MIT // OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol) pragma solidity ^0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); }
// SPDX-License-Identifier: MIT pragma solidity 0.8.17; interface IChainlinkV3Aggregator { function decimals() external view returns (uint8); function latestRoundData() external view returns ( uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound ); }
// SPDX-License-Identifier: GPL-3.0 pragma solidity 0.8.17; import '@openzeppelin/contracts-upgradeable/token/ERC20/IERC20Upgradeable.sol'; interface IStableCoin is IERC20Upgradeable { function mint(address _to, uint256 _value) external; function burn(uint256 _value) external; function burnFrom(address _from, uint256 _value) external; }
// SPDX-License-Identifier: GPL-3.0 pragma solidity 0.8.17; interface IStrategy { error ZeroAmount(); error ZeroAddress(); error InvalidAmount(); error InsufficientAmount(); error Unauthorized(); function deposit( address _account, uint _amount ) external returns (uint share); function withdraw( address _account, uint _shareAmount ) external returns (uint withdrawn); function getUnderlyingAmount(address _account) external view returns (uint); function toAmount(uint share) external view returns (uint); function pendingRewards( address _account ) external view returns (address[] memory, uint256[] memory); function claimRewards(address _account) external; }
// SPDX-License-Identifier: GPL-3.0 pragma solidity 0.8.17; import '@openzeppelin/contracts-upgradeable/access/AccessControlUpgradeable.sol'; import '@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol'; import '@openzeppelin/contracts-upgradeable/utils/structs/EnumerableSetUpgradeable.sol'; import '@openzeppelin/contracts-upgradeable/token/ERC20/utils/SafeERC20Upgradeable.sol'; import '../../interfaces/IStableCoin.sol'; import '../../utils/RateLib.sol'; import {ERC20ValueProvider} from './ERC20ValueProvider.sol'; /// @title ERC20 / ERC1155 lending vault /// @notice This contracts allows users to borrow ShezmuUSD using ERC20/ERC1155 tokens as collateral. /// The price of the collateral token is fetched using a chainlink oracle abstract contract AbstractAssetVault is AccessControlUpgradeable, ReentrancyGuardUpgradeable { using SafeERC20Upgradeable for IERC20Upgradeable; using SafeERC20Upgradeable for IStableCoin; using EnumerableSetUpgradeable for EnumerableSetUpgradeable.AddressSet; using RateLib for RateLib.Rate; error InvalidAmount(uint256 amount); error InvalidPosition(address owner); error DebtCapReached(); error NoDebt(); error InsufficientCollateral(); error UnknownAction(uint8 action); error InvalidLength(); error MinBorrowAmount(); event CollateralAdded(address indexed owner, uint256 colAmount); event Borrowed(address indexed owner, uint256 amount); event Repaid(address indexed owner, uint256 amount); event CollateralRemoved(address indexed owner, uint256 colAmount); event Liquidated( address indexed liquidator, address indexed owner, uint256 colAmount ); event Accrual(uint256 additionalInterest); event FeeCollected(uint256 collectedAmount); struct Position { uint256 collateral; uint256 debtPrincipal; uint256 debtPortion; } struct VaultSettings { RateLib.Rate debtInterestApr; RateLib.Rate organizationFeeRate; uint256 borrowAmountCap; uint256 minBorrowAmount; } bytes32 internal constant DAO_ROLE = keccak256('DAO_ROLE'); bytes32 internal constant LIQUIDATOR_ROLE = keccak256('LIQUIDATOR_ROLE'); bytes32 internal constant SETTER_ROLE = keccak256('SETTER_ROLE'); bytes32 internal constant LEVERAGE_ROLE = keccak256('LEVERAGE_ROLE'); //accrue required uint8 internal constant ACTION_ADD_COLLATERAL = 0; uint8 internal constant ACTION_REMOVE_COLLATERAL = 1; uint8 internal constant ACTION_BORROW = 2; uint8 internal constant ACTION_REPAY = 3; uint8 internal constant ACTION_LIQUIDATE = 4; IStableCoin public stablecoin; /// @notice Total outstanding debt uint256 public totalDebtAmount; /// @dev Last time debt was accrued. See {accrue} for more info uint256 internal totalDebtAccruedAt; uint256 public totalFeeCollected; uint256 internal totalDebtPortion; VaultSettings public settings; /// @dev Keeps track of all the users EnumerableSetUpgradeable.AddressSet internal userIndexes; mapping(address => Position) public positions; /// @notice This function is only called once during deployment of the proxy contract. It's not called after upgrades. /// @param _stablecoin ShezUSD address /// @param _settings Initial settings used by the contract function __initialize( IStableCoin _stablecoin, VaultSettings calldata _settings ) internal onlyInitializing { __AccessControl_init(); __ReentrancyGuard_init(); _setupRole(DAO_ROLE, msg.sender); _setRoleAdmin(LIQUIDATOR_ROLE, DAO_ROLE); _setRoleAdmin(SETTER_ROLE, DAO_ROLE); _setRoleAdmin(LEVERAGE_ROLE, DAO_ROLE); _setRoleAdmin(DAO_ROLE, DAO_ROLE); if ( !_settings.debtInterestApr.isValid() || !_settings.debtInterestApr.isBelowOne() ) revert RateLib.InvalidRate(); if ( !_settings.organizationFeeRate.isValid() || !_settings.organizationFeeRate.isBelowOne() ) revert RateLib.InvalidRate(); stablecoin = _stablecoin; settings = _settings; } /// @notice Returns the number of open positions /// @return The number of open positions function totalUsersLength() external view returns (uint256) { return userIndexes.length(); } /// @notice Returns all open position owners /// @return The open position owners function totalUsers() external view returns (address[] memory) { return userIndexes.values(); } /// @param _owner The position owner /// @return The ShezUSD credit limit of owner function getCreditLimit(address _owner) external view returns (uint256) { return _getCreditLimit(_owner, positions[_owner].collateral); } /// @param _owner The position owner /// @return The ShezUSD liquidation limit of owner function getLiquidationLimit(address _owner) public view returns (uint256) { return _getLiquidationLimit(_owner, positions[_owner].collateral); } /// @param _owner The position owner /// @return Whether the position is liquidatable or not function isLiquidatable(address _owner) external view returns (bool) { return positions[_owner].debtPrincipal + getDebtInterest(_owner) >= getLiquidationLimit(_owner); } /// @param _owner The position owner /// @return The ShezUSD debt interest accumulated function getDebtInterest(address _owner) public view returns (uint256) { Position storage position = positions[_owner]; uint256 principal = position.debtPrincipal; uint256 debt = _calculateDebt( totalDebtAmount + calculateAdditionalInterest(), position.debtPortion, totalDebtPortion ); //_calculateDebt is prone to rounding errors that may cause //the calculated debt amount to be 1 or 2 units less than //the debt principal if no time has elapsed in between the first borrow //and the _calculateDebt call. if (principal > debt) debt = principal; unchecked { return debt - principal; } } /// @dev Calculates the additional global interest since last time the contract's state was updated by calling {accrue} /// @return The additional interest value function calculateAdditionalInterest() public view returns (uint256) { // Number of seconds since {accrue} was called uint256 elapsedTime = block.timestamp - totalDebtAccruedAt; if (elapsedTime == 0) { return 0; } uint256 totalDebt = totalDebtAmount; if (totalDebt == 0) { return 0; } // Accrue interest return (elapsedTime * totalDebt * settings.debtInterestApr.numerator) / settings.debtInterestApr.denominator / 365.25 days; } /// @dev The {accrue} function updates the contract's state by calculating /// the additional interest accrued since the last state update function accrue() public { uint256 additionalInterest = calculateAdditionalInterest(); totalDebtAccruedAt = block.timestamp; totalDebtAmount += additionalInterest; totalFeeCollected += additionalInterest; emit Accrual(additionalInterest); } /// @notice Allows to execute multiple actions in a single transaction. /// @param _actions The actions to execute. /// @param _data The abi encoded parameters for the actions to execute. function doActions( uint8[] calldata _actions, bytes[] calldata _data ) external nonReentrant { _doActionsFor(msg.sender, _actions, _data); } /// @notice Allows a user to add collateral /// @param _colAmount The collateral amount function addCollateral(uint256 _colAmount) external nonReentrant { accrue(); _addCollateral(msg.sender, msg.sender, _colAmount); } /// @notice Allows a user to add collateral on behalf of user /// @param _colAmount The collateral amount /// @param _onBehalfOf The onBeHalfOf user function addCollateralFor( uint _colAmount, address _onBehalfOf ) external nonReentrant onlyRole(LEVERAGE_ROLE) { accrue(); _addCollateral(msg.sender, _onBehalfOf, _colAmount); } /// @notice Allows users to borrow ShezUSD /// @dev emits a {Borrowed} event /// @param _amount The amount of ShezUSD to be borrowed. Note that the user will receive less than the amount requested, function borrow(uint256 _amount) external nonReentrant { accrue(); _borrow(msg.sender, msg.sender, _amount); } /// @notice Allows users to borrow ShezUSD /// @dev emits a {Borrowed} event /// @param _amount The amount of ShezUSD to be borrowed. Note that the user will receive less than the amount requested, function borrowFor( uint256 _amount, address _onBehalfOf ) external nonReentrant onlyRole(LEVERAGE_ROLE) { accrue(); _borrow(msg.sender, _onBehalfOf, _amount); } /// @notice Allows users to repay a portion/all of their debt. Note that since interest increases every second, /// a user wanting to repay all of their debt should repay for an amount greater than their current debt to account for the /// additional interest while the repay transaction is pending, the contract will only take what's necessary to repay all the debt /// @dev Emits a {Repaid} event /// @param _amount The amount of debt to repay. If greater than the position's outstanding debt, only the amount necessary to repay all the debt will be taken function repay(uint256 _amount) external nonReentrant { accrue(); _repay(msg.sender, _amount); } /// @notice Allows a user to remove collateral /// @dev Emits a {PositionClosed} event /// @param _colAmount The collateral amount function removeCollateral(uint256 _colAmount) external nonReentrant { accrue(); _removeCollateral(msg.sender, _colAmount); } /// @notice Allows members of the `LIQUIDATOR_ROLE` to liquidate a position. Positions can only be liquidated /// once their debt amount exceeds the minimum liquidation debt to collateral value rate. /// In order to liquidate a position, the liquidator needs to repay the user's outstanding debt. /// @dev Emits a {Liquidated} event /// @param _owner The position owner /// @param _recipient The address to send collaterals to function liquidate( address _owner, address _recipient ) external nonReentrant { accrue(); _liquidate(msg.sender, _owner, _recipient); } /// @notice Allows the DAO to collect interest and fees before they are repaid function collect() external nonReentrant onlyRole(DAO_ROLE) { accrue(); uint256 _totalFeeCollected = totalFeeCollected; stablecoin.mint(msg.sender, _totalFeeCollected); totalFeeCollected = 0; emit FeeCollected(_totalFeeCollected); } /// @notice Allows the DAO to withdraw _amount of an ERC20 function rescueToken( IERC20Upgradeable _token, uint256 _amount ) external nonReentrant onlyRole(DAO_ROLE) { _token.safeTransfer(msg.sender, _amount); } function setRoleAdmin( bytes32 role, bytes32 adminRole ) external nonReentrant onlyRole(DAO_ROLE) { _setRoleAdmin(role, adminRole); } /// @notice Allows the setter contract to change fields in the `VaultSettings` struct. /// @dev Validation and single field setting is handled by an external contract with the /// `SETTER_ROLE`. This was done to reduce the contract's size. function setSettings( VaultSettings calldata _settings ) external onlyRole(SETTER_ROLE) { accrue(); if ( !_settings.debtInterestApr.isValid() || !_settings.debtInterestApr.isBelowOne() ) revert RateLib.InvalidRate(); if ( !_settings.organizationFeeRate.isValid() || !_settings.organizationFeeRate.isBelowOne() ) revert RateLib.InvalidRate(); settings = _settings; } /// @dev See {doActions} function _doActionsFor( address _account, uint8[] calldata _actions, bytes[] calldata _data ) internal { if (_actions.length != _data.length) revert InvalidLength(); bool accrueCalled; for (uint256 i; i < _actions.length; ++i) { uint8 action = _actions[i]; if (!accrueCalled && action < 100) { accrue(); accrueCalled = true; } if (action == ACTION_ADD_COLLATERAL) { uint256 colAmount = abi.decode(_data[i], (uint256)); _addCollateral(_account, _account, colAmount); } else if (action == ACTION_BORROW) { uint256 amount = abi.decode(_data[i], (uint256)); _borrow(_account, _account, amount); } else if (action == ACTION_REPAY) { uint256 amount = abi.decode(_data[i], (uint256)); _repay(_account, amount); } else if (action == ACTION_REMOVE_COLLATERAL) { uint256 colAmount = abi.decode(_data[i], (uint256)); _removeCollateral(_account, colAmount); } else if (action == ACTION_LIQUIDATE) { (address owner, address recipient) = abi.decode( _data[i], (address, address) ); _liquidate(_account, owner, recipient); } else { revert UnknownAction(action); } } } /// @dev See {addCollateral} function _addCollateral( address _account, address _onBehalfOf, uint256 _colAmount ) internal virtual {} /// @dev See {borrow} function _borrow( address _account, address _onBehalfOf, uint256 _amount ) internal { if (_amount < settings.minBorrowAmount) { revert MinBorrowAmount(); } uint256 _totalDebtAmount = totalDebtAmount; if (_totalDebtAmount + _amount > settings.borrowAmountCap) revert DebtCapReached(); Position storage position = positions[_onBehalfOf]; uint256 _creditLimit = _getCreditLimit( _onBehalfOf, position.collateral ); uint256 _debtAmount = _getDebtAmount(_onBehalfOf); if (_debtAmount + _amount > _creditLimit) revert InvalidAmount(_amount); //calculate the borrow fee uint256 _organizationFee = (_amount * settings.organizationFeeRate.numerator) / settings.organizationFeeRate.denominator; uint256 _feeAmount = _organizationFee; totalFeeCollected += _feeAmount; // update debt portion { uint256 _totalDebtPortion = totalDebtPortion; uint256 _plusPortion = _calculatePortion( _totalDebtPortion, _amount, _totalDebtAmount ); totalDebtPortion = _totalDebtPortion + _plusPortion; position.debtPortion += _plusPortion; position.debtPrincipal += _amount; totalDebtAmount = _totalDebtAmount + _amount; } //subtract the fee from the amount borrowed stablecoin.mint(_account, _amount - _feeAmount); emit Borrowed(_onBehalfOf, _amount); } /// @dev See {repay} function _repay(address _account, uint256 _amount) internal { if (_amount == 0) revert InvalidAmount(_amount); Position storage position = positions[_account]; uint256 _debtAmount = _getDebtAmount(_account); if (_debtAmount == 0) revert NoDebt(); uint256 _debtPrincipal = position.debtPrincipal; uint256 _debtInterest = _debtAmount - _debtPrincipal; _amount = _amount > _debtAmount ? _debtAmount : _amount; // burn all payment, the interest is sent to the DAO using the {collect} function stablecoin.burnFrom(_account, _amount); uint256 _paidPrincipal; unchecked { _paidPrincipal = _amount > _debtInterest ? _amount - _debtInterest : 0; } uint256 _totalDebtPortion = totalDebtPortion; uint256 _totalDebtAmount = totalDebtAmount; uint256 _debtPortion = position.debtPortion; uint256 _minusPortion = _paidPrincipal == _debtPrincipal ? _debtPortion : _calculatePortion(_totalDebtPortion, _amount, _totalDebtAmount); totalDebtPortion = _totalDebtPortion - _minusPortion; position.debtPortion = _debtPortion - _minusPortion; position.debtPrincipal = _debtPrincipal - _paidPrincipal; totalDebtAmount = _totalDebtAmount - _amount; if ( position.debtPrincipal > 0 && position.debtPrincipal < settings.minBorrowAmount ) { revert MinBorrowAmount(); } emit Repaid(_account, _amount); } /// @dev See {removeCollateral} function _removeCollateral( address _account, uint256 _colAmount ) internal virtual {} /// @dev See {liquidate} function _liquidate( address _account, address _owner, address _recipient ) internal virtual {} /// @dev Returns the credit limit /// @param _owner The position owner /// @param _colAmount The collateral amount /// @return The credit limit function _getCreditLimit( address _owner, uint256 _colAmount ) internal view virtual returns (uint256) {} /// @dev Returns the minimum amount of debt necessary to liquidate the position /// @param _owner The position owner /// @param _colAmount The collateral amount /// @return The minimum amount of debt to liquidate the position function _getLiquidationLimit( address _owner, uint256 _colAmount ) internal view virtual returns (uint256) {} /// @dev Calculates current outstanding debt of a user /// @param _owner The position owner /// @return The outstanding debt value function _getDebtAmount(address _owner) internal view returns (uint256) { uint256 calculatedDebt = _calculateDebt( totalDebtAmount, positions[_owner].debtPortion, totalDebtPortion ); uint256 principal = positions[_owner].debtPrincipal; //_calculateDebt is prone to rounding errors that may cause //the calculated debt amount to be 1 or 2 units less than //the debt principal when the accrue() function isn't called //in between the first borrow and the _calculateDebt call. return principal > calculatedDebt ? principal : calculatedDebt; } /// @dev Calculates the total debt of a position given the global debt, the user's portion of the debt and the total user portions /// @param total The global outstanding debt /// @param userPortion The user's portion of debt /// @param totalPortion The total user portions of debt /// @return The outstanding debt of the position function _calculateDebt( uint256 total, uint256 userPortion, uint256 totalPortion ) internal pure returns (uint256) { return totalPortion == 0 ? 0 : (total * userPortion) / totalPortion; } /// @dev Calculates the debt portion of a position given the global debt portion, the debt amount and the global debt amount /// @param _total The total user portions of debt /// @param _userDebt The user's debt /// @param _totalDebt The global outstanding debt /// @return _userDebt converted into a debt portion function _calculatePortion( uint256 _total, uint256 _userDebt, uint256 _totalDebt ) internal pure returns (uint256) { return _total == 0 ? _userDebt : (_total * _userDebt) / _totalDebt; } }
// SPDX-License-Identifier: GPL-3.0 pragma solidity 0.8.17; import '@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol'; import '@openzeppelin/contracts-upgradeable/token/ERC20/extensions/IERC20MetadataUpgradeable.sol'; import '../../utils/AccessControlUpgradeable.sol'; import '../../utils/RateLib.sol'; import '../../interfaces/IChainlinkV3Aggregator.sol'; abstract contract ERC20ValueProvider is ReentrancyGuardUpgradeable, AccessControlUpgradeable { using RateLib for RateLib.Rate; error InvalidAmount(uint256 amount); error ZeroAddress(); error InvalidOracleResults(); event NewBaseCreditLimitRate(RateLib.Rate rate); event NewBaseLiquidationLimitRate(RateLib.Rate rate); /// @notice The token oracles aggregator IChainlinkV3Aggregator public aggregator; /// @notice The token address IERC20MetadataUpgradeable public token; RateLib.Rate public baseCreditLimitRate; RateLib.Rate public baseLiquidationLimitRate; /// @notice This function is only called once during deployment of the proxy contract. It's not called after upgrades. /// @param _aggregator The token oracles aggregator /// @param _token The token address /// @param _baseCreditLimitRate The base credit limit rate /// @param _baseLiquidationLimitRate The base liquidation limit rate function __initialize( IChainlinkV3Aggregator _aggregator, IERC20MetadataUpgradeable _token, RateLib.Rate calldata _baseCreditLimitRate, RateLib.Rate calldata _baseLiquidationLimitRate ) internal onlyInitializing { __AccessControl_init(); __ReentrancyGuard_init(); if (address(_aggregator) == address(0)) revert ZeroAddress(); _validateRateBelowOne(_baseCreditLimitRate); _validateRateBelowOne(_baseLiquidationLimitRate); _grantRole(DEFAULT_ADMIN_ROLE, msg.sender); aggregator = _aggregator; token = _token; baseCreditLimitRate = _baseCreditLimitRate; baseLiquidationLimitRate = _baseLiquidationLimitRate; } /// @param _owner The owner address /// @param _colAmount The collateral amount /// @return The credit limit rate function getCreditLimitRate( address _owner, uint256 _colAmount ) public view returns (RateLib.Rate memory) { return baseCreditLimitRate; } /// @param _owner The owner address /// @param _colAmount The collateral amount /// @return The liquidation limit rate function getLiquidationLimitRate( address _owner, uint256 _colAmount ) public view returns (RateLib.Rate memory) { return baseLiquidationLimitRate; } /// @param _owner The owner address /// @param _colAmount The collateral amount /// @return The credit limit for collateral amount function getCreditLimitUSD( address _owner, uint256 _colAmount ) external view returns (uint256) { RateLib.Rate memory _creditLimitRate = getCreditLimitRate( _owner, _colAmount ); return _creditLimitRate.calculate(getPriceUSD(_colAmount)); } /// @param _owner The owner address /// @param _colAmount The collateral amount /// @return The liquidation limit for collateral amount function getLiquidationLimitUSD( address _owner, uint256 _colAmount ) external view returns (uint256) { RateLib.Rate memory _liquidationLimitRate = getLiquidationLimitRate( _owner, _colAmount ); return _liquidationLimitRate.calculate(getPriceUSD(_colAmount)); } /// @return The value for the collection, in USD. function getPriceUSD(uint256 colAmount) public view returns (uint256) { uint256 price = getPriceUSD(); return (price * colAmount) / (10 ** token.decimals()); } /// @return The value for the collection, in USD. function getPriceUSD() public view virtual returns (uint256) { (, int256 answer, , uint256 timestamp, ) = aggregator.latestRoundData(); if (answer == 0 || timestamp == 0) revert InvalidOracleResults(); uint8 decimals = aggregator.decimals(); unchecked { //converts the answer to have 18 decimals return decimals > 18 ? uint256(answer) / 10 ** (decimals - 18) : uint256(answer) * 10 ** (18 - decimals); } } function setBaseCreditLimitRate( RateLib.Rate memory _baseCreditLimitRate ) external onlyRole(DEFAULT_ADMIN_ROLE) { _validateRateBelowOne(_baseCreditLimitRate); baseCreditLimitRate = _baseCreditLimitRate; emit NewBaseCreditLimitRate(_baseCreditLimitRate); } function setBaseLiquidationLimitRate( RateLib.Rate memory _liquidationLimitRate ) external onlyRole(DEFAULT_ADMIN_ROLE) { _validateRateBelowOne(_liquidationLimitRate); baseLiquidationLimitRate = _liquidationLimitRate; emit NewBaseLiquidationLimitRate(_liquidationLimitRate); } /// @dev Validates a rate. The denominator must be greater than zero and greater than or equal to the numerator. /// @param _rate The rate to validate function _validateRateBelowOne(RateLib.Rate memory _rate) internal pure { if (!_rate.isValid() || _rate.isAboveOne()) revert RateLib.InvalidRate(); } }
// SPDX-License-Identifier: GPL-3.0 pragma solidity 0.8.17; import "@openzeppelin/contracts-upgradeable/access/IAccessControlUpgradeable.sol"; import "@openzeppelin/contracts-upgradeable/proxy/utils/Initializable.sol"; import "@openzeppelin/contracts-upgradeable/utils/ContextUpgradeable.sol"; import "@openzeppelin/contracts-upgradeable/utils/StringsUpgradeable.sol"; import "@openzeppelin/contracts/utils/introspection/ERC165.sol"; //copy paste of openzeppelin's {AccessControlUpgradeable} contract but instead of extending //{ERC165Upgradeable} it extends {ERC165} to have the storage layout match {OwnableUpgradeable}'s //and allow replacing it. abstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControlUpgradeable, ERC165 { function __AccessControl_init() internal onlyInitializing {} function __AccessControl_init_unchained() internal onlyInitializing {} struct RoleData { mapping(address => bool) members; bytes32 adminRole; } mapping(bytes32 => RoleData) private _roles; bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00; /** * @dev Modifier that checks that an account has a specific role. Reverts * with a standardized message including the required role. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ * * _Available since v4.1._ */ modifier onlyRole(bytes32 role) { _checkRole(role, _msgSender()); _; } /** * @dev See {IERC165-supportsInterface}. */ function supportsInterface( bytes4 interfaceId ) public view virtual override returns (bool) { return interfaceId == type(IAccessControlUpgradeable).interfaceId || super.supportsInterface(interfaceId); } /** * @dev Returns `true` if `account` has been granted `role`. */ function hasRole( bytes32 role, address account ) public view virtual override returns (bool) { return _roles[role].members[account]; } /** * @dev Revert with a standard message if `account` is missing `role`. * * The format of the revert reason is given by the following regular expression: * * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/ */ function _checkRole(bytes32 role, address account) internal view virtual { if (!hasRole(role, account)) { revert( string( abi.encodePacked( "AccessControl: account ", StringsUpgradeable.toHexString(uint160(account), 20), " is missing role ", StringsUpgradeable.toHexString(uint256(role), 32) ) ) ); } } /** * @dev Returns the admin role that controls `role`. See {grantRole} and * {revokeRole}. * * To change a role's admin, use {_setRoleAdmin}. */ function getRoleAdmin( bytes32 role ) public view virtual override returns (bytes32) { return _roles[role].adminRole; } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function grantRole( bytes32 role, address account ) public virtual override onlyRole(getRoleAdmin(role)) { _grantRole(role, account); } /** * @dev Revokes `role` from `account`. * * If `account` had been granted `role`, emits a {RoleRevoked} event. * * Requirements: * * - the caller must have ``role``'s admin role. */ function revokeRole( bytes32 role, address account ) public virtual override onlyRole(getRoleAdmin(role)) { _revokeRole(role, account); } /** * @dev Revokes `role` from the calling account. * * Roles are often managed via {grantRole} and {revokeRole}: this function's * purpose is to provide a mechanism for accounts to lose their privileges * if they are compromised (such as when a trusted device is misplaced). * * If the calling account had been revoked `role`, emits a {RoleRevoked} * event. * * Requirements: * * - the caller must be `account`. */ function renounceRole( bytes32 role, address account ) public virtual override { require( account == _msgSender(), "AccessControl: can only renounce roles for self" ); _revokeRole(role, account); } /** * @dev Grants `role` to `account`. * * If `account` had not been already granted `role`, emits a {RoleGranted} * event. Note that unlike {grantRole}, this function doesn't perform any * checks on the calling account. * * [WARNING] * ==== * This function should only be called from the constructor when setting * up the initial roles for the system. * * Using this function in any other way is effectively circumventing the admin * system imposed by {AccessControl}. * ==== * * NOTE: This function is deprecated in favor of {_grantRole}. */ function _setupRole(bytes32 role, address account) internal virtual { _grantRole(role, account); } /** * @dev Sets `adminRole` as ``role``'s admin role. * * Emits a {RoleAdminChanged} event. */ function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual { bytes32 previousAdminRole = getRoleAdmin(role); _roles[role].adminRole = adminRole; emit RoleAdminChanged(role, previousAdminRole, adminRole); } /** * @dev Grants `role` to `account`. * * Internal function without access restriction. */ function _grantRole(bytes32 role, address account) internal virtual { if (!hasRole(role, account)) { _roles[role].members[account] = true; emit RoleGranted(role, account, _msgSender()); } } /** * @dev Revokes `role` from `account`. * * Internal function without access restriction. */ function _revokeRole(bytes32 role, address account) internal virtual { if (hasRole(role, account)) { _roles[role].members[account] = false; emit RoleRevoked(role, account, _msgSender()); } } /** * @dev This empty reserved space is put in place to allow future versions to add new * variables without shifting down storage in the inheritance chain. * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps */ uint256[49] private __gap; }
// SPDX-License-Identifier: GPL-3.0 pragma solidity 0.8.17; library RateLib { error InvalidRate(); struct Rate { uint128 numerator; uint128 denominator; } function isValid(Rate memory _rate) internal pure returns (bool) { return _rate.denominator != 0; } function isZero(Rate memory _rate) internal pure returns (bool) { return _rate.numerator == 0; } function isAboveOne(Rate memory _rate) internal pure returns (bool) { return _rate.numerator > _rate.denominator; } function isBelowOne(Rate memory _rate) internal pure returns (bool) { return _rate.denominator > _rate.numerator; } function isOne(Rate memory _rate) internal pure returns (bool) { return _rate.numerator == _rate.denominator; } function greaterThan( Rate memory _r1, Rate memory _r2 ) internal pure returns (bool) { return _r1.numerator * _r2.denominator > _r2.numerator * _r1.denominator; } function sum( Rate memory _r1, Rate memory _r2 ) internal pure returns (Rate memory) { return Rate({ numerator: _r1.numerator * _r2.denominator + _r1.denominator * _r2.numerator, denominator: _r1.denominator * _r2.denominator }); } function calculate( Rate memory _rate, uint256 _num ) internal pure returns (uint256) { return (_num * _rate.numerator) / _rate.denominator; } }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "metadata": { "useLiteralContent": true }, "libraries": {} }
Contract Security Audit
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[{"inputs":[],"name":"DebtCapReached","type":"error"},{"inputs":[],"name":"InsufficientCollateral","type":"error"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"InvalidAmount","type":"error"},{"inputs":[],"name":"InvalidLength","type":"error"},{"inputs":[{"internalType":"address","name":"owner","type":"address"}],"name":"InvalidPosition","type":"error"},{"inputs":[],"name":"InvalidRate","type":"error"},{"inputs":[],"name":"MinBorrowAmount","type":"error"},{"inputs":[],"name":"NoDebt","type":"error"},{"inputs":[{"internalType":"uint8","name":"action","type":"uint8"}],"name":"UnknownAction","type":"error"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"additionalInterest","type":"uint256"}],"name":"Accrual","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Borrowed","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":false,"internalType":"uint256","name":"colAmount","type":"uint256"}],"name":"CollateralAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":false,"internalType":"uint256","name":"colAmount","type":"uint256"}],"name":"CollateralRemoved","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"collectedAmount","type":"uint256"}],"name":"FeeCollected","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint8","name":"version","type":"uint8"}],"name":"Initialized","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"liquidator","type":"address"},{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":false,"internalType":"uint256","name":"colAmount","type":"uint256"}],"name":"Liquidated","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Repaid","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"previousAdminRole","type":"bytes32"},{"indexed":true,"internalType":"bytes32","name":"newAdminRole","type":"bytes32"}],"name":"RoleAdminChanged","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleGranted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"bytes32","name":"role","type":"bytes32"},{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"sender","type":"address"}],"name":"RoleRevoked","type":"event"},{"inputs":[],"name":"DEFAULT_ADMIN_ROLE","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"accrue","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_colAmount","type":"uint256"}],"name":"addCollateral","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_colAmount","type":"uint256"},{"internalType":"address","name":"_onBehalfOf","type":"address"}],"name":"addCollateralFor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"borrow","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"address","name":"_onBehalfOf","type":"address"}],"name":"borrowFor","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"calculateAdditionalInterest","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"collect","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint8[]","name":"_actions","type":"uint8[]"},{"internalType":"bytes[]","name":"_data","type":"bytes[]"}],"name":"doActions","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"}],"name":"getCreditLimit","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"}],"name":"getDebtInterest","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"}],"name":"getLiquidationLimit","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"}],"name":"getRoleAdmin","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"grantRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"hasRole","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"contract IStableCoin","name":"_stablecoin","type":"address"},{"internalType":"contract IERC20Upgradeable","name":"_tokenContract","type":"address"},{"internalType":"contract IStrategy","name":"_strategy","type":"address"},{"internalType":"address","name":"_valueProvider","type":"address"},{"components":[{"components":[{"internalType":"uint128","name":"numerator","type":"uint128"},{"internalType":"uint128","name":"denominator","type":"uint128"}],"internalType":"struct RateLib.Rate","name":"debtInterestApr","type":"tuple"},{"components":[{"internalType":"uint128","name":"numerator","type":"uint128"},{"internalType":"uint128","name":"denominator","type":"uint128"}],"internalType":"struct RateLib.Rate","name":"organizationFeeRate","type":"tuple"},{"internalType":"uint256","name":"borrowAmountCap","type":"uint256"},{"internalType":"uint256","name":"minBorrowAmount","type":"uint256"}],"internalType":"struct AbstractAssetVault.VaultSettings","name":"_settings","type":"tuple"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"}],"name":"isLiquidatable","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"},{"internalType":"address","name":"_recipient","type":"address"}],"name":"liquidate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"positions","outputs":[{"internalType":"uint256","name":"collateral","type":"uint256"},{"internalType":"uint256","name":"debtPrincipal","type":"uint256"},{"internalType":"uint256","name":"debtPortion","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_colAmount","type":"uint256"}],"name":"removeCollateral","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"renounceRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"repay","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"contract IERC20Upgradeable","name":"_token","type":"address"},{"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"rescueToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"address","name":"account","type":"address"}],"name":"revokeRole","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes32","name":"role","type":"bytes32"},{"internalType":"bytes32","name":"adminRole","type":"bytes32"}],"name":"setRoleAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"components":[{"components":[{"internalType":"uint128","name":"numerator","type":"uint128"},{"internalType":"uint128","name":"denominator","type":"uint128"}],"internalType":"struct RateLib.Rate","name":"debtInterestApr","type":"tuple"},{"components":[{"internalType":"uint128","name":"numerator","type":"uint128"},{"internalType":"uint128","name":"denominator","type":"uint128"}],"internalType":"struct RateLib.Rate","name":"organizationFeeRate","type":"tuple"},{"internalType":"uint256","name":"borrowAmountCap","type":"uint256"},{"internalType":"uint256","name":"minBorrowAmount","type":"uint256"}],"internalType":"struct AbstractAssetVault.VaultSettings","name":"_settings","type":"tuple"}],"name":"setSettings","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_valueProvider","type":"address"}],"name":"setValueProvider","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"settings","outputs":[{"components":[{"internalType":"uint128","name":"numerator","type":"uint128"},{"internalType":"uint128","name":"denominator","type":"uint128"}],"internalType":"struct RateLib.Rate","name":"debtInterestApr","type":"tuple"},{"components":[{"internalType":"uint128","name":"numerator","type":"uint128"},{"internalType":"uint128","name":"denominator","type":"uint128"}],"internalType":"struct RateLib.Rate","name":"organizationFeeRate","type":"tuple"},{"internalType":"uint256","name":"borrowAmountCap","type":"uint256"},{"internalType":"uint256","name":"minBorrowAmount","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"stablecoin","outputs":[{"internalType":"contract IStableCoin","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"strategy","outputs":[{"internalType":"contract IStrategy","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"tokenContract","outputs":[{"internalType":"contract IERC20Upgradeable","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalDebtAmount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalFeeCollected","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalUsers","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalUsersLength","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"valueProvider","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"}]
Contract Creation Code
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Multichain Portfolio | 27 Chains
Chain | Token | Portfolio % | Price | Amount | Value |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.