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{
"language": "Solidity",
"sources": {
"contracts/UZD.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.0;\n\nimport './ZunamiElasticVault.sol';\n\ncontract UZD is ZunamiElasticVault {\n address public constant ZUNAMI = 0x2ffCC661011beC72e1A9524E12060983E74D14ce;\n\n constructor()\n ElasticERC20('UZD Zunami Stable', 'UZD')\n ElasticVault(IERC20Metadata(ZUNAMI))\n ZunamiElasticVault(ZUNAMI)\n {}\n}\n"
},
"contracts/ZunamiElasticVault.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.0;\n\nimport '@openzeppelin/contracts/access/AccessControl.sol';\nimport './ElasticVault.sol';\n\nabstract contract ZunamiElasticVault is ElasticVault, AccessControl {\n using Math for uint256;\n\n bytes32 public constant REBALANCER_ROLE = keccak256('REBALANCER_ROLE');\n\n uint256 public constant FEE_DENOMINATOR = 1000000; // 100.0000%\n uint256 public constant MAX_FEE = 50000; // 5%\n\n uint256 public withdrawFee;\n address public feeDistributor;\n\n uint256 public dailyDepositDuration; // in blocks\n uint256 public dailyDepositLimit; // in minimal value\n\n uint256 public dailyWithdrawDuration; // in blocks\n uint256 public dailyWithdrawLimit; // in minimal value\n\n uint256 public dailyDepositTotal;\n uint256 public dailyDepositCountingBlock; // start block of limit counting\n\n uint256 public dailyWithdrawTotal;\n uint256 public dailyWithdrawCountingBlock; // start block of limit counting\n\n IAssetPriceOracle public priceOracle;\n\n uint256 private _assetPriceCacheDuration = 1200; // cache every 4 hour\n \n event AssetPriceCacheDurationSet(uint256 newAssetPriceCacheDuration, uint256 oldAssetPriceCacheDuration);\n event DailyDepositParamsChanged(uint256 dailyDepositDuration, uint256 dailyDepositLimit);\n event DailyWithdrawParamsChanged(uint256 dailyWithdrawDuration, uint256 dailyWithdrawLimit);\n event WithdrawFeeChanged(uint256 withdrawFee);\n event FeeDistributorChanged(address feeDistributor);\n\n constructor(address priceOracle_) {\n _setupRole(DEFAULT_ADMIN_ROLE, msg.sender);\n\n require(priceOracle_ != address(0), 'Zero price oracle');\n priceOracle = IAssetPriceOracle(priceOracle_);\n\n cacheAssetPrice();\n }\n\n function assetPrice() public view override returns (uint256) {\n return priceOracle.lpPrice();\n }\n\n function assetPriceCacheDuration() public view override returns (uint256) {\n return _assetPriceCacheDuration;\n }\n\n function setAssetPriceCacheDuration(uint256 assetPriceCacheDuration_) external onlyRole(DEFAULT_ADMIN_ROLE) {\n emit AssetPriceCacheDurationSet(assetPriceCacheDuration_, _assetPriceCacheDuration);\n _assetPriceCacheDuration = assetPriceCacheDuration_;\n }\n\n function changeDailyDepositParams(uint256 dailyDepositDuration_, uint256 dailyDepositLimit_)\n external\n onlyRole(DEFAULT_ADMIN_ROLE)\n {\n dailyDepositDuration = dailyDepositDuration_;\n dailyDepositLimit = dailyDepositLimit_;\n\n dailyDepositTotal = 0;\n dailyDepositCountingBlock = dailyDepositDuration > 0 ? block.number : 0;\n\n emit DailyDepositParamsChanged(dailyDepositDuration_, dailyDepositLimit_);\n }\n\n function changeDailyWithdrawParams(uint256 dailyWithdrawDuration_, uint256 dailyWithdrawLimit_)\n external\n onlyRole(DEFAULT_ADMIN_ROLE)\n {\n dailyWithdrawDuration = dailyWithdrawDuration_;\n dailyWithdrawLimit = dailyWithdrawLimit_;\n\n dailyWithdrawTotal = 0;\n dailyWithdrawCountingBlock = dailyWithdrawDuration > 0 ? block.number : 0;\n\n emit DailyWithdrawParamsChanged(dailyWithdrawDuration_, dailyWithdrawLimit_);\n }\n\n function changeWithdrawFee(uint256 withdrawFee_) external onlyRole(DEFAULT_ADMIN_ROLE) {\n require(withdrawFee_ <= MAX_FEE, 'Bigger that MAX_FEE constant');\n withdrawFee = withdrawFee_;\n\n emit WithdrawFeeChanged(withdrawFee_);\n }\n\n function changeFeeDistributor(address feeDistributor_) external onlyRole(DEFAULT_ADMIN_ROLE) {\n require(feeDistributor_ != address(0), 'Zero fee distributor');\n feeDistributor = feeDistributor_;\n\n emit FeeDistributorChanged(feeDistributor_);\n }\n\n function _beforeDeposit(\n address caller,\n address,\n uint256 value,\n uint256\n ) internal override {\n if (dailyDepositDuration > 0 && !hasRole(REBALANCER_ROLE, caller)) {\n if (block.number > dailyDepositCountingBlock + dailyDepositDuration) {\n dailyDepositTotal = 0;\n dailyDepositCountingBlock = block.number;\n }\n dailyDepositTotal += value;\n require(dailyDepositTotal <= dailyDepositLimit, 'Daily deposit limit overflow');\n }\n }\n\n function _beforeWithdraw(\n address caller,\n address,\n address,\n uint256 value,\n uint256\n ) internal override {\n if (dailyWithdrawDuration > 0 && !hasRole(REBALANCER_ROLE, caller)) {\n if (block.number > dailyWithdrawCountingBlock + dailyWithdrawDuration) {\n dailyWithdrawTotal = 0;\n dailyWithdrawCountingBlock = block.number;\n }\n dailyWithdrawTotal += value;\n require(dailyWithdrawTotal <= dailyWithdrawLimit, 'Daily withdraw limit overflow');\n }\n }\n\n function _calcFee(\n address caller,\n uint256 value,\n uint256 nominal\n ) internal view override returns (uint256 valueFee, uint256 nominalFee) {\n valueFee = 0;\n nominalFee = 0;\n if (withdrawFee > 0 && !hasRole(REBALANCER_ROLE, caller)) {\n nominalFee = nominal.mulDiv(withdrawFee, FEE_DENOMINATOR, Math.Rounding.Down);\n valueFee = value.mulDiv(withdrawFee, FEE_DENOMINATOR, Math.Rounding.Down);\n }\n }\n\n function _withdrawFee(uint256 valueFee, uint256) internal override {\n if (valueFee > 0) {\n SafeERC20.safeTransfer(IERC20Metadata(asset()), feeDistributor, valueFee);\n }\n }\n}\n"
},
"contracts/ElasticVault.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.0;\n\nimport '@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol';\nimport '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';\nimport '@openzeppelin/contracts/utils/math/Math.sol';\nimport './ElasticERC20.sol';\nimport './interfaces/IElasticVault.sol';\n\n/**\n * @dev OpenZeppelin v4.7.0 ERC4626 fork\n */\nabstract contract ElasticVault is ElasticERC20, IElasticVault {\n using Math for uint256;\n\n IERC20Metadata private immutable _asset;\n\n /**\n * @dev Set the underlying asset contract. This must be an ERC20-compatible contract (ERC20 or ERC777).\n */\n constructor(IERC20Metadata asset_) {\n _asset = asset_;\n }\n\n function asset() public view virtual override returns (address) {\n return address(_asset);\n }\n\n function totalAssets() public view virtual override returns (uint256) {\n return _asset.balanceOf(address(this));\n }\n\n function convertToNominal(uint256 value)\n public\n view\n virtual\n override\n returns (uint256 nominal)\n {\n return _convertToNominalCached(value, Math.Rounding.Down);\n }\n\n function convertToValue(uint256 nominal) public view virtual override returns (uint256 value) {\n return _convertFromNominalCached(nominal, Math.Rounding.Down);\n }\n\n function maxDeposit(address) public view virtual override returns (uint256) {\n return _isVaultCollateralized() ? type(uint256).max : 0;\n }\n\n function maxWithdraw(address owner) public view virtual override returns (uint256) {\n return balanceOf(owner);\n }\n\n function _maxWithdrawWithCaching(address owner) internal returns (uint256) {\n return _convertFromNominalWithCaching(balanceOfNominal(owner), Math.Rounding.Down);\n }\n\n function previewDeposit(uint256 nominal) public view virtual override returns (uint256) {\n return _convertFromNominalCached(nominal, Math.Rounding.Down);\n }\n\n function _previewDepositWithCaching(uint256 nominal) internal virtual returns (uint256) {\n return _convertFromNominalWithCaching(nominal, Math.Rounding.Down);\n }\n\n function previewWithdraw(uint256 value) public view virtual override returns (uint256) {\n (uint256 valueFee, ) = _calcFee(_msgSender(), value, 0);\n return _convertToNominalCached(value - valueFee, Math.Rounding.Up);\n }\n\n function _previewWithdrawWithCaching(uint256 value) internal virtual returns (uint256) {\n return _convertToNominalWithCaching(value, Math.Rounding.Up);\n }\n\n function deposit(uint256 nominal, address receiver) public virtual override returns (uint256) {\n require(nominal <= maxDeposit(receiver), 'ElasticVault: deposit more than max');\n\n uint256 value = _previewDepositWithCaching(nominal);\n _deposit(_msgSender(), receiver, value, nominal);\n\n return nominal;\n }\n\n function withdraw(\n uint256 value,\n address receiver,\n address owner\n ) public virtual override returns (uint256) {\n require(value <= _maxWithdrawWithCaching(owner), 'ElasticVault: withdraw more than max');\n\n uint256 nominal = _previewWithdrawWithCaching(value);\n _withdraw(_msgSender(), receiver, owner, value, nominal);\n\n return nominal;\n }\n\n function withdrawAll(address receiver, address owner) public virtual returns (uint256) {\n uint256 nominal = balanceOfNominal(owner);\n uint256 value = _maxWithdrawWithCaching(owner);\n _withdraw(_msgSender(), receiver, owner, value, nominal);\n\n return nominal;\n }\n\n function _beforeDeposit(\n address caller,\n address receiver,\n uint256 value,\n uint256 nominal\n ) internal virtual {}\n\n /**\n * @dev Deposit/mint common workflow.\n */\n function _deposit(\n address caller,\n address receiver,\n uint256 value,\n uint256 nominal\n ) internal virtual {\n _beforeDeposit(caller, receiver, value, nominal);\n\n // If _asset is ERC777, `transferFrom` can trigger a reenterancy BEFORE the transfer happens through the\n // `tokensToSend` hook. On the other hand, the `tokenReceived` hook, that is triggered after the transfer,\n // calls the vault, which is assumed not malicious.\n //\n // Conclusion: we need to do the transfer before we mint so that any reentrancy would happen before the\n // value are transfered and before the nominal are minted, which is a valid state.\n // slither-disable-next-line reentrancy-no-eth\n SafeERC20.safeTransferFrom(IERC20Metadata(asset()), caller, address(this), nominal);\n _mint(receiver, nominal, value);\n\n emit Deposit(caller, receiver, value, nominal);\n }\n\n function _beforeWithdraw(\n address caller,\n address receiver,\n address owner,\n uint256 value,\n uint256 nominal\n ) internal virtual {}\n\n function _calcFee(\n address,\n uint256,\n uint256\n ) internal view virtual returns (uint256 valueFee, uint256 nominalFee) {\n return (0, 0);\n }\n\n function _withdrawFee(uint256 value, uint256 nominal) internal virtual {}\n\n /**\n * @dev Withdraw/redeem common workflow.\n */\n function _withdraw(\n address caller,\n address receiver,\n address owner,\n uint256 value,\n uint256 nominal\n ) internal virtual {\n _beforeWithdraw(caller, receiver, owner, value, nominal);\n\n if (caller != owner) {\n _spendAllowance(owner, caller, value);\n }\n\n (uint256 valueFee, uint256 nominalFee) = _calcFee(caller, value, nominal);\n nominal -= nominalFee;\n value -= valueFee;\n _withdrawFee(valueFee, nominalFee);\n\n // If _asset is ERC777, `transfer` can trigger a reentrancy AFTER the transfer happens through the\n // `tokensReceived` hook. On the other hand, the `tokensToSend` hook, that is triggered before the transfer,\n // calls the vault, which is assumed not malicious.\n //\n // Conclusion: we need to do the transfer after the burn so that any reentrancy would happen after the\n // nominal are burned and after the value are transfered, which is a valid state.\n _burn(owner, nominal, value);\n SafeERC20.safeTransfer(IERC20Metadata(asset()), receiver, nominal);\n\n emit Withdraw(caller, receiver, owner, value, nominal, valueFee);\n }\n\n function _isVaultCollateralized() private view returns (bool) {\n return totalAssets() > 0 || totalSupplyNominal() == 0;\n }\n}\n"
},
"@openzeppelin/contracts/access/AccessControl.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (access/AccessControl.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IAccessControl.sol\";\nimport \"../utils/Context.sol\";\nimport \"../utils/Strings.sol\";\nimport \"../utils/introspection/ERC165.sol\";\n\n/**\n * @dev Contract module that allows children to implement role-based access\n * control mechanisms. This is a lightweight version that doesn't allow enumerating role\n * members except through off-chain means by accessing the contract event logs. Some\n * applications may benefit from on-chain enumerability, for those cases see\n * {AccessControlEnumerable}.\n *\n * Roles are referred to by their `bytes32` identifier. These should be exposed\n * in the external API and be unique. The best way to achieve this is by\n * using `public constant` hash digests:\n *\n * ```\n * bytes32 public constant MY_ROLE = keccak256(\"MY_ROLE\");\n * ```\n *\n * Roles can be used to represent a set of permissions. To restrict access to a\n * function call, use {hasRole}:\n *\n * ```\n * function foo() public {\n * require(hasRole(MY_ROLE, msg.sender));\n * ...\n * }\n * ```\n *\n * Roles can be granted and revoked dynamically via the {grantRole} and\n * {revokeRole} functions. Each role has an associated admin role, and only\n * accounts that have a role's admin role can call {grantRole} and {revokeRole}.\n *\n * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means\n * that only accounts with this role will be able to grant or revoke other\n * roles. More complex role relationships can be created by using\n * {_setRoleAdmin}.\n *\n * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to\n * grant and revoke this role. Extra precautions should be taken to secure\n * accounts that have been granted it.\n */\nabstract contract AccessControl is Context, IAccessControl, ERC165 {\n struct RoleData {\n mapping(address => bool) members;\n bytes32 adminRole;\n }\n\n mapping(bytes32 => RoleData) private _roles;\n\n bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;\n\n /**\n * @dev Modifier that checks that an account has a specific role. Reverts\n * with a standardized message including the required role.\n *\n * The format of the revert reason is given by the following regular expression:\n *\n * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/\n *\n * _Available since v4.1._\n */\n modifier onlyRole(bytes32 role) {\n _checkRole(role);\n _;\n }\n\n /**\n * @dev See {IERC165-supportsInterface}.\n */\n function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);\n }\n\n /**\n * @dev Returns `true` if `account` has been granted `role`.\n */\n function hasRole(bytes32 role, address account) public view virtual override returns (bool) {\n return _roles[role].members[account];\n }\n\n /**\n * @dev Revert with a standard message if `_msgSender()` is missing `role`.\n * Overriding this function changes the behavior of the {onlyRole} modifier.\n *\n * Format of the revert message is described in {_checkRole}.\n *\n * _Available since v4.6._\n */\n function _checkRole(bytes32 role) internal view virtual {\n _checkRole(role, _msgSender());\n }\n\n /**\n * @dev Revert with a standard message if `account` is missing `role`.\n *\n * The format of the revert reason is given by the following regular expression:\n *\n * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/\n */\n function _checkRole(bytes32 role, address account) internal view virtual {\n if (!hasRole(role, account)) {\n revert(\n string(\n abi.encodePacked(\n \"AccessControl: account \",\n Strings.toHexString(uint160(account), 20),\n \" is missing role \",\n Strings.toHexString(uint256(role), 32)\n )\n )\n );\n }\n }\n\n /**\n * @dev Returns the admin role that controls `role`. See {grantRole} and\n * {revokeRole}.\n *\n * To change a role's admin, use {_setRoleAdmin}.\n */\n function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {\n return _roles[role].adminRole;\n }\n\n /**\n * @dev Grants `role` to `account`.\n *\n * If `account` had not been already granted `role`, emits a {RoleGranted}\n * event.\n *\n * Requirements:\n *\n * - the caller must have ``role``'s admin role.\n *\n * May emit a {RoleGranted} event.\n */\n function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {\n _grantRole(role, account);\n }\n\n /**\n * @dev Revokes `role` from `account`.\n *\n * If `account` had been granted `role`, emits a {RoleRevoked} event.\n *\n * Requirements:\n *\n * - the caller must have ``role``'s admin role.\n *\n * May emit a {RoleRevoked} event.\n */\n function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {\n _revokeRole(role, account);\n }\n\n /**\n * @dev Revokes `role` from the calling account.\n *\n * Roles are often managed via {grantRole} and {revokeRole}: this function's\n * purpose is to provide a mechanism for accounts to lose their privileges\n * if they are compromised (such as when a trusted device is misplaced).\n *\n * If the calling account had been revoked `role`, emits a {RoleRevoked}\n * event.\n *\n * Requirements:\n *\n * - the caller must be `account`.\n *\n * May emit a {RoleRevoked} event.\n */\n function renounceRole(bytes32 role, address account) public virtual override {\n require(account == _msgSender(), \"AccessControl: can only renounce roles for self\");\n\n _revokeRole(role, account);\n }\n\n /**\n * @dev Grants `role` to `account`.\n *\n * If `account` had not been already granted `role`, emits a {RoleGranted}\n * event. Note that unlike {grantRole}, this function doesn't perform any\n * checks on the calling account.\n *\n * May emit a {RoleGranted} event.\n *\n * [WARNING]\n * ====\n * This function should only be called from the constructor when setting\n * up the initial roles for the system.\n *\n * Using this function in any other way is effectively circumventing the admin\n * system imposed by {AccessControl}.\n * ====\n *\n * NOTE: This function is deprecated in favor of {_grantRole}.\n */\n function _setupRole(bytes32 role, address account) internal virtual {\n _grantRole(role, account);\n }\n\n /**\n * @dev Sets `adminRole` as ``role``'s admin role.\n *\n * Emits a {RoleAdminChanged} event.\n */\n function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {\n bytes32 previousAdminRole = getRoleAdmin(role);\n _roles[role].adminRole = adminRole;\n emit RoleAdminChanged(role, previousAdminRole, adminRole);\n }\n\n /**\n * @dev Grants `role` to `account`.\n *\n * Internal function without access restriction.\n *\n * May emit a {RoleGranted} event.\n */\n function _grantRole(bytes32 role, address account) internal virtual {\n if (!hasRole(role, account)) {\n _roles[role].members[account] = true;\n emit RoleGranted(role, account, _msgSender());\n }\n }\n\n /**\n * @dev Revokes `role` from `account`.\n *\n * Internal function without access restriction.\n *\n * May emit a {RoleRevoked} event.\n */\n function _revokeRole(bytes32 role, address account) internal virtual {\n if (hasRole(role, account)) {\n _roles[role].members[account] = false;\n emit RoleRevoked(role, account, _msgSender());\n }\n }\n}\n"
},
"contracts/ElasticERC20.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.0;\n\nimport '@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol';\nimport '@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol';\nimport '@openzeppelin/contracts/utils/math/Math.sol';\nimport '@openzeppelin/contracts/utils/Context.sol';\nimport './PricableAsset.sol';\n\n/**\n * @dev OpenZeppelin v4.7.0 ERC20 fork\n */\nabstract contract ElasticERC20 is Context, PricableAsset, IERC20Metadata {\n using Math for uint256;\n\n uint8 public constant DEFAULT_DECIMALS = 18;\n uint256 public constant DEFAULT_DECIMALS_FACTOR = uint256(10)**DEFAULT_DECIMALS;\n\n mapping(address => uint256) private _balances;\n\n mapping(address => mapping(address => uint256)) private _allowances;\n\n uint256 private _totalSupply;\n\n string private _name;\n string private _symbol;\n\n constructor(string memory name_, string memory symbol_) {\n _name = name_;\n _symbol = symbol_;\n }\n\n function _convertToNominalWithCaching(uint256 value, Math.Rounding rounding)\n internal\n virtual\n returns (uint256 nominal)\n {\n if (value == type(uint256).max) return type(uint256).max;\n _cacheAssetPriceByBlock();\n return value.mulDiv(DEFAULT_DECIMALS_FACTOR, assetPriceCached(), rounding);\n }\n\n function _convertFromNominalWithCaching(uint256 nominal, Math.Rounding rounding)\n internal\n virtual\n returns (uint256 value)\n {\n if (nominal == type(uint256).max) return type(uint256).max;\n _cacheAssetPriceByBlock();\n return nominal.mulDiv(assetPriceCached(), DEFAULT_DECIMALS_FACTOR, rounding);\n }\n\n function _convertToNominalCached(uint256 value, Math.Rounding rounding)\n internal\n view\n virtual\n returns (uint256 nominal)\n {\n if (value == type(uint256).max) return type(uint256).max;\n\n return value.mulDiv(DEFAULT_DECIMALS_FACTOR, assetPriceCached(), rounding);\n }\n\n function _convertFromNominalCached(uint256 nominal, Math.Rounding rounding)\n internal\n view\n virtual\n returns (uint256 value)\n {\n if (nominal == type(uint256).max) return type(uint256).max;\n\n return nominal.mulDiv(assetPriceCached(), DEFAULT_DECIMALS_FACTOR, rounding);\n }\n\n function totalSupplyNominal() public view returns (uint256) {\n return _totalSupply;\n }\n\n function balanceOfNominal(address account) public view returns (uint256) {\n return _balances[account];\n }\n\n function allowanceNominal(address owner, address spender) public view returns (uint256) {\n return _allowances[owner][spender];\n }\n\n // IERC20\n function name() public view virtual override returns (string memory) {\n return _name;\n }\n\n function symbol() public view virtual override returns (string memory) {\n return _symbol;\n }\n\n function decimals() public view virtual override returns (uint8) {\n return 18;\n }\n\n function totalSupply() public view virtual override returns (uint256) {\n // don't cache price\n return _convertFromNominalCached(_totalSupply, Math.Rounding.Down);\n }\n\n function balanceOf(address account) public view virtual override returns (uint256) {\n // don't cache price\n return _convertFromNominalCached(_balances[account], Math.Rounding.Down);\n }\n\n function allowance(address owner, address spender)\n public\n view\n virtual\n override\n returns (uint256)\n {\n // don't cache price\n return _convertFromNominalCached(_allowances[owner][spender], Math.Rounding.Down);\n }\n\n function _allowanceWithCaching(address owner, address spender) internal virtual returns (uint256) {\n return _convertFromNominalWithCaching(_allowances[owner][spender], Math.Rounding.Down);\n }\n\n function transfer(address to, uint256 amount) public virtual override returns (bool) {\n _transfer(_msgSender(), to, _convertToNominalWithCaching(amount, Math.Rounding.Up), amount);\n return true;\n }\n\n function approve(address spender, uint256 amount) public virtual override returns (bool) {\n _approve(_msgSender(), spender, amount);\n return true;\n }\n\n function transferFrom(\n address from,\n address to,\n uint256 amount\n ) public virtual override returns (bool) {\n uint256 nominalAmount = _convertToNominalWithCaching(amount, Math.Rounding.Up);\n _spendAllowance(from, _msgSender(), amount);\n _transfer(from, to, nominalAmount, amount);\n return true;\n }\n\n function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {\n address owner = _msgSender();\n _approve(owner, spender, _allowanceWithCaching(owner, spender) + addedValue);\n return true;\n }\n\n function decreaseAllowance(address spender, uint256 subtractedValue)\n public\n virtual\n returns (bool)\n {\n address owner = _msgSender();\n uint256 currentAllowance = _allowanceWithCaching(owner, spender);\n require(currentAllowance >= subtractedValue, 'ElasticERC20: decreased allowance below zero');\n unchecked {\n _approve(owner, spender, currentAllowance - subtractedValue);\n }\n\n return true;\n }\n\n function _transfer(\n address from,\n address to,\n uint256 nominal,\n uint256 value\n ) internal virtual {\n require(from != address(0), 'ElasticERC20: transfer from the zero address');\n require(to != address(0), 'ElasticERC20: transfer to the zero address');\n\n uint256 fromBalance = _balances[from];\n require(fromBalance >= nominal, 'ElasticERC20: transfer amount exceeds balance');\n unchecked {\n _balances[from] = fromBalance - nominal;\n }\n _balances[to] += nominal;\n\n emit Transfer(from, to, value);\n }\n\n function _mint(\n address account,\n uint256 nominal,\n uint256 value\n ) internal virtual {\n require(account != address(0), 'ElasticERC20: mint to the zero address');\n\n _totalSupply += nominal;\n _balances[account] += nominal;\n emit Transfer(address(0), account, value);\n }\n\n function _burn(\n address account,\n uint256 nominal,\n uint256 value\n ) internal virtual {\n require(account != address(0), 'ElasticERC20: burn from the zero address');\n\n uint256 accountBalance = balanceOfNominal(account);\n require(accountBalance >= nominal, 'ElasticERC20: burn amount exceeds balance');\n unchecked {\n _balances[account] = accountBalance - nominal;\n }\n _totalSupply -= nominal;\n\n emit Transfer(account, address(0), value);\n }\n\n function _approve(\n address owner,\n address spender,\n uint256 value\n ) internal virtual {\n require(owner != address(0), 'ElasticERC20: approve from the zero address');\n require(spender != address(0), 'ElasticERC20: approve to the zero address');\n\n _allowances[owner][spender] = _convertToNominalWithCaching(value, Math.Rounding.Up);\n emit Approval(owner, spender, value);\n }\n\n function _spendAllowance(\n address owner,\n address spender,\n uint256 value\n ) internal virtual {\n uint256 currentAllowance = _allowanceWithCaching(owner, spender);\n if (currentAllowance != type(uint256).max) {\n require(currentAllowance >= value, 'ElasticERC20: insufficient allowance');\n unchecked {\n _approve(owner, spender, currentAllowance - value);\n }\n }\n }\n}\n"
},
"contracts/interfaces/IElasticVault.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.0;\n\nimport '@openzeppelin/contracts/token/ERC20/IERC20.sol';\nimport '@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol';\n\n/**\n * @dev OpenZeppelin v4.7.0 IERC4626 fork\n */\ninterface IElasticVault is IERC20, IERC20Metadata {\n event Deposit(address indexed caller, address indexed owner, uint256 value, uint256 nominal);\n\n event Withdraw(\n address indexed caller,\n address indexed receiver,\n address indexed owner,\n uint256 value,\n uint256 nominal,\n uint256 fee\n );\n\n /**\n * @dev Returns the address of the underlying token used for the Vault for accounting, depositing, and withdrawing.\n *\n * - MUST be an ERC-20 token contract.\n * - MUST NOT revert.\n */\n function asset() external view returns (address assetTokenAddress);\n\n /**\n * @dev Returns the total amount of the underlying asset that is “managed” by Vault.\n *\n * - SHOULD include any compounding that occurs from yield.\n * - MUST be inclusive of any fees that are charged against assets in the Vault.\n * - MUST NOT revert.\n */\n function totalAssets() external view returns (uint256 totalManagedAssets);\n\n /**\n * @dev Returns the amount of shares that the Vault would exchange for the amount of assets provided, in an ideal\n * scenario where all the conditions are met.\n *\n * - MUST NOT be inclusive of any fees that are charged against assets in the Vault.\n * - MUST NOT show any variations depending on the caller.\n * - MUST NOT reflect slippage or other on-chain conditions, when performing the actual exchange.\n * - MUST NOT revert.\n *\n * NOTE: This calculation MAY NOT reflect the “per-user” price-per-share, and instead should reflect the\n * “average-user’s” price-per-share, meaning what the average user should expect to see when exchanging to and\n * from.\n */\n function convertToNominal(uint256 value) external view returns (uint256 nominal);\n\n /**\n * @dev Returns the amount of assets that the Vault would exchange for the amount of shares provided, in an ideal\n * scenario where all the conditions are met.\n *\n * - MUST NOT be inclusive of any fees that are charged against assets in the Vault.\n * - MUST NOT show any variations depending on the caller.\n * - MUST NOT reflect slippage or other on-chain conditions, when performing the actual exchange.\n * - MUST NOT revert.\n *\n * NOTE: This calculation MAY NOT reflect the “per-user” price-per-share, and instead should reflect the\n * “average-user’s” price-per-share, meaning what the average user should expect to see when exchanging to and\n * from.\n */\n function convertToValue(uint256 nominal) external view returns (uint256 value);\n\n /**\n * @dev Returns the maximum amount of the underlying asset that can be deposited into the Vault for the receiver,\n * through a deposit call.\n *\n * - MUST return a limited value if receiver is subject to some deposit limit.\n * - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of assets that may be deposited.\n * - MUST NOT revert.\n */\n function maxDeposit(address receiver) external view returns (uint256 maxAssets);\n\n /**\n * @dev Allows an on-chain or off-chain user to simulate the effects of their deposit at the current block, given\n * current on-chain conditions.\n *\n * - MUST return as close to and no more than the exact amount of Vault shares that would be minted in a deposit\n * call in the same transaction. I.e. deposit should return the same or more shares as previewDeposit if called\n * in the same transaction.\n * - MUST NOT account for deposit limits like those returned from maxDeposit and should always act as though the\n * deposit would be accepted, regardless if the user has enough tokens approved, etc.\n * - MUST be inclusive of deposit fees. Integrators should be aware of the existence of deposit fees.\n * - MUST NOT revert.\n *\n * NOTE: any unfavorable discrepancy between convertToShares and previewDeposit SHOULD be considered slippage in\n * share price or some other type of condition, meaning the depositor will lose assets by depositing.\n */\n function previewDeposit(uint256 assets) external view returns (uint256 shares);\n\n /**\n * @dev Mints shares Vault shares to receiver by depositing exactly amount of underlying tokens.\n *\n * - MUST emit the Deposit event.\n * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the\n * deposit execution, and are accounted for during deposit.\n * - MUST revert if all of assets cannot be deposited (due to deposit limit being reached, slippage, the user not\n * approving enough underlying tokens to the Vault contract, etc).\n *\n * NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token.\n */\n function deposit(uint256 assets, address receiver) external returns (uint256 shares);\n\n /**\n * @dev Returns the maximum amount of the underlying asset that can be withdrawn from the owner balance in the\n * Vault, through a withdraw call.\n *\n * - MUST return a limited value if owner is subject to some withdrawal limit or timelock.\n * - MUST NOT revert.\n */\n function maxWithdraw(address owner) external view returns (uint256 maxAssets);\n\n /**\n * @dev Allows an on-chain or off-chain user to simulate the effects of their withdrawal at the current block,\n * given current on-chain conditions.\n *\n * - MUST return as close to and no fewer than the exact amount of Vault shares that would be burned in a withdraw\n * call in the same transaction. I.e. withdraw should return the same or fewer shares as previewWithdraw if\n * called\n * in the same transaction.\n * - MUST NOT account for withdrawal limits like those returned from maxWithdraw and should always act as though\n * the withdrawal would be accepted, regardless if the user has enough shares, etc.\n * - MUST be inclusive of withdrawal fees. Integrators should be aware of the existence of withdrawal fees.\n * - MUST NOT revert.\n *\n * NOTE: any unfavorable discrepancy between convertToShares and previewWithdraw SHOULD be considered slippage in\n * share price or some other type of condition, meaning the depositor will lose assets by depositing.\n */\n function previewWithdraw(uint256 assets) external view returns (uint256 shares);\n\n /**\n * @dev Burns shares from owner and sends exactly assets of underlying tokens to receiver.\n *\n * - MUST emit the Withdraw event.\n * - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the\n * withdraw execution, and are accounted for during withdraw.\n * - MUST revert if all of assets cannot be withdrawn (due to withdrawal limit being reached, slippage, the owner\n * not having enough shares, etc).\n *\n * Note that some implementations will require pre-requesting to the Vault before a withdrawal may be performed.\n * Those methods should be performed separately.\n */\n function withdraw(\n uint256 assets,\n address receiver,\n address owner\n ) external returns (uint256 shares);\n}\n"
},
"@openzeppelin/contracts/utils/math/Math.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (utils/math/Math.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Standard math utilities missing in the Solidity language.\n */\nlibrary Math {\n enum Rounding {\n Down, // Toward negative infinity\n Up, // Toward infinity\n Zero // Toward zero\n }\n\n /**\n * @dev Returns the largest of two numbers.\n */\n function max(uint256 a, uint256 b) internal pure returns (uint256) {\n return a >= b ? a : b;\n }\n\n /**\n * @dev Returns the smallest of two numbers.\n */\n function min(uint256 a, uint256 b) internal pure returns (uint256) {\n return a < b ? a : b;\n }\n\n /**\n * @dev Returns the average of two numbers. The result is rounded towards\n * zero.\n */\n function average(uint256 a, uint256 b) internal pure returns (uint256) {\n // (a + b) / 2 can overflow.\n return (a & b) + (a ^ b) / 2;\n }\n\n /**\n * @dev Returns the ceiling of the division of two numbers.\n *\n * This differs from standard division with `/` in that it rounds up instead\n * of rounding down.\n */\n function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {\n // (a + b - 1) / b can overflow on addition, so we distribute.\n return a == 0 ? 0 : (a - 1) / b + 1;\n }\n\n /**\n * @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or denominator == 0\n * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv)\n * with further edits by Uniswap Labs also under MIT license.\n */\n function mulDiv(\n uint256 x,\n uint256 y,\n uint256 denominator\n ) internal pure returns (uint256 result) {\n unchecked {\n // 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use\n // use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256\n // variables such that product = prod1 * 2^256 + prod0.\n uint256 prod0; // Least significant 256 bits of the product\n uint256 prod1; // Most significant 256 bits of the product\n assembly {\n let mm := mulmod(x, y, not(0))\n prod0 := mul(x, y)\n prod1 := sub(sub(mm, prod0), lt(mm, prod0))\n }\n\n // Handle non-overflow cases, 256 by 256 division.\n if (prod1 == 0) {\n return prod0 / denominator;\n }\n\n // Make sure the result is less than 2^256. Also prevents denominator == 0.\n require(denominator > prod1);\n\n ///////////////////////////////////////////////\n // 512 by 256 division.\n ///////////////////////////////////////////////\n\n // Make division exact by subtracting the remainder from [prod1 prod0].\n uint256 remainder;\n assembly {\n // Compute remainder using mulmod.\n remainder := mulmod(x, y, denominator)\n\n // Subtract 256 bit number from 512 bit number.\n prod1 := sub(prod1, gt(remainder, prod0))\n prod0 := sub(prod0, remainder)\n }\n\n // Factor powers of two out of denominator and compute largest power of two divisor of denominator. Always >= 1.\n // See https://cs.stackexchange.com/q/138556/92363.\n\n // Does not overflow because the denominator cannot be zero at this stage in the function.\n uint256 twos = denominator & (~denominator + 1);\n assembly {\n // Divide denominator by twos.\n denominator := div(denominator, twos)\n\n // Divide [prod1 prod0] by twos.\n prod0 := div(prod0, twos)\n\n // Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.\n twos := add(div(sub(0, twos), twos), 1)\n }\n\n // Shift in bits from prod1 into prod0.\n prod0 |= prod1 * twos;\n\n // Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such\n // that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for\n // four bits. That is, denominator * inv = 1 mod 2^4.\n uint256 inverse = (3 * denominator) ^ 2;\n\n // Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also works\n // in modular arithmetic, doubling the correct bits in each step.\n inverse *= 2 - denominator * inverse; // inverse mod 2^8\n inverse *= 2 - denominator * inverse; // inverse mod 2^16\n inverse *= 2 - denominator * inverse; // inverse mod 2^32\n inverse *= 2 - denominator * inverse; // inverse mod 2^64\n inverse *= 2 - denominator * inverse; // inverse mod 2^128\n inverse *= 2 - denominator * inverse; // inverse mod 2^256\n\n // Because the division is now exact we can divide by multiplying with the modular inverse of denominator.\n // This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is\n // less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1\n // is no longer required.\n result = prod0 * inverse;\n return result;\n }\n }\n\n /**\n * @notice Calculates x * y / denominator with full precision, following the selected rounding direction.\n */\n function mulDiv(\n uint256 x,\n uint256 y,\n uint256 denominator,\n Rounding rounding\n ) internal pure returns (uint256) {\n uint256 result = mulDiv(x, y, denominator);\n if (rounding == Rounding.Up && mulmod(x, y, denominator) > 0) {\n result += 1;\n }\n return result;\n }\n\n /**\n * @dev Returns the square root of a number. It the number is not a perfect square, the value is rounded down.\n *\n * Inspired by Henry S. Warren, Jr.'s \"Hacker's Delight\" (Chapter 11).\n */\n function sqrt(uint256 a) internal pure returns (uint256) {\n if (a == 0) {\n return 0;\n }\n\n // For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.\n // We know that the \"msb\" (most significant bit) of our target number `a` is a power of 2 such that we have\n // `msb(a) <= a < 2*msb(a)`.\n // We also know that `k`, the position of the most significant bit, is such that `msb(a) = 2**k`.\n // This gives `2**k < a <= 2**(k+1)` → `2**(k/2) <= sqrt(a) < 2 ** (k/2+1)`.\n // Using an algorithm similar to the msb conmputation, we are able to compute `result = 2**(k/2)` which is a\n // good first aproximation of `sqrt(a)` with at least 1 correct bit.\n uint256 result = 1;\n uint256 x = a;\n if (x >> 128 > 0) {\n x >>= 128;\n result <<= 64;\n }\n if (x >> 64 > 0) {\n x >>= 64;\n result <<= 32;\n }\n if (x >> 32 > 0) {\n x >>= 32;\n result <<= 16;\n }\n if (x >> 16 > 0) {\n x >>= 16;\n result <<= 8;\n }\n if (x >> 8 > 0) {\n x >>= 8;\n result <<= 4;\n }\n if (x >> 4 > 0) {\n x >>= 4;\n result <<= 2;\n }\n if (x >> 2 > 0) {\n result <<= 1;\n }\n\n // At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,\n // since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at\n // every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision\n // into the expected uint128 result.\n unchecked {\n result = (result + a / result) >> 1;\n result = (result + a / result) >> 1;\n result = (result + a / result) >> 1;\n result = (result + a / result) >> 1;\n result = (result + a / result) >> 1;\n result = (result + a / result) >> 1;\n result = (result + a / result) >> 1;\n return min(result, a / result);\n }\n }\n\n /**\n * @notice Calculates sqrt(a), following the selected rounding direction.\n */\n function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {\n uint256 result = sqrt(a);\n if (rounding == Rounding.Up && result * result < a) {\n result += 1;\n }\n return result;\n }\n}\n"
},
"@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.sol\";\n\n/**\n * @dev Interface for the optional metadata functions from the ERC20 standard.\n *\n * _Available since v4.1._\n */\ninterface IERC20Metadata is IERC20 {\n /**\n * @dev Returns the name of the token.\n */\n function name() external view returns (string memory);\n\n /**\n * @dev Returns the symbol of the token.\n */\n function symbol() external view returns (string memory);\n\n /**\n * @dev Returns the decimals places of the token.\n */\n function decimals() external view returns (uint8);\n}\n"
},
"@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/utils/SafeERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.sol\";\nimport \"../extensions/draft-IERC20Permit.sol\";\nimport \"../../../utils/Address.sol\";\n\n/**\n * @title SafeERC20\n * @dev Wrappers around ERC20 operations that throw on failure (when the token\n * contract returns false). Tokens that return no value (and instead revert or\n * throw on failure) are also supported, non-reverting calls are assumed to be\n * successful.\n * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,\n * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.\n */\nlibrary SafeERC20 {\n using Address for address;\n\n function safeTransfer(\n IERC20 token,\n address to,\n uint256 value\n ) internal {\n _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));\n }\n\n function safeTransferFrom(\n IERC20 token,\n address from,\n address to,\n uint256 value\n ) internal {\n _callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));\n }\n\n /**\n * @dev Deprecated. This function has issues similar to the ones found in\n * {IERC20-approve}, and its usage is discouraged.\n *\n * Whenever possible, use {safeIncreaseAllowance} and\n * {safeDecreaseAllowance} instead.\n */\n function safeApprove(\n IERC20 token,\n address spender,\n uint256 value\n ) internal {\n // safeApprove should only be called when setting an initial allowance,\n // or when resetting it to zero. To increase and decrease it, use\n // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'\n require(\n (value == 0) || (token.allowance(address(this), spender) == 0),\n \"SafeERC20: approve from non-zero to non-zero allowance\"\n );\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));\n }\n\n function safeIncreaseAllowance(\n IERC20 token,\n address spender,\n uint256 value\n ) internal {\n uint256 newAllowance = token.allowance(address(this), spender) + value;\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n }\n\n function safeDecreaseAllowance(\n IERC20 token,\n address spender,\n uint256 value\n ) internal {\n unchecked {\n uint256 oldAllowance = token.allowance(address(this), spender);\n require(oldAllowance >= value, \"SafeERC20: decreased allowance below zero\");\n uint256 newAllowance = oldAllowance - value;\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));\n }\n }\n\n function safePermit(\n IERC20Permit token,\n address owner,\n address spender,\n uint256 value,\n uint256 deadline,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) internal {\n uint256 nonceBefore = token.nonces(owner);\n token.permit(owner, spender, value, deadline, v, r, s);\n uint256 nonceAfter = token.nonces(owner);\n require(nonceAfter == nonceBefore + 1, \"SafeERC20: permit did not succeed\");\n }\n\n /**\n * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement\n * on the return value: the return value is optional (but if data is returned, it must not be false).\n * @param token The token targeted by the call.\n * @param data The call data (encoded using abi.encode or one of its variants).\n */\n function _callOptionalReturn(IERC20 token, bytes memory data) private {\n // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since\n // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that\n // the target address contains contract code and also asserts for success in the low-level call.\n\n bytes memory returndata = address(token).functionCall(data, \"SafeERC20: low-level call failed\");\n if (returndata.length > 0) {\n // Return data is optional\n require(abi.decode(returndata, (bool)), \"SafeERC20: ERC20 operation did not succeed\");\n }\n }\n}\n"
},
"contracts/PricableAsset.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.0;\n\nimport './interfaces/IAssetPriceOracle.sol';\n\nabstract contract PricableAsset {\n uint256 private _blockCached;\n uint256 private _assetPriceCached;\n\n event CachedAssetPrice(uint256 blockNumber, uint256 assetPrice);\n\n function assetPriceCacheDuration() public view virtual returns (uint256);\n\n function assetPrice() public view virtual returns (uint256);\n\n function assetPriceCached() public view virtual returns (uint256) {\n return _assetPriceCached;\n }\n\n function blockCached() public view virtual returns (uint256) {\n return _blockCached;\n }\n\n function cacheAssetPrice() public virtual {\n _blockCached = block.number;\n uint256 currentAssetPrice = assetPrice();\n if (_assetPriceCached < currentAssetPrice) {\n _assetPriceCached = currentAssetPrice;\n emit CachedAssetPrice(_blockCached, _assetPriceCached);\n }\n }\n\n function _cacheAssetPriceByBlock() internal virtual {\n if (block.number >= _blockCached + assetPriceCacheDuration()) {\n cacheAssetPrice();\n }\n }\n\n function _resetPriceCache() internal virtual {\n _blockCached = 0;\n _assetPriceCached = 0;\n }\n}\n"
},
"@openzeppelin/contracts/utils/Context.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract Context {\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n}\n"
},
"contracts/interfaces/IAssetPriceOracle.sol": {
"content": "// SPDX-License-Identifier: MIT\npragma solidity ^0.8.0;\n\ninterface IAssetPriceOracle {\n function lpPrice() external view returns (uint256);\n}\n"
},
"@openzeppelin/contracts/token/ERC20/IERC20.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n /**\n * @dev Emitted when `value` tokens are moved from one account (`from`) to\n * another (`to`).\n *\n * Note that `value` may be zero.\n */\n event Transfer(address indexed from, address indexed to, uint256 value);\n\n /**\n * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n * a call to {approve}. `value` is the new allowance.\n */\n event Approval(address indexed owner, address indexed spender, uint256 value);\n\n /**\n * @dev Returns the amount of tokens in existence.\n */\n function totalSupply() external view returns (uint256);\n\n /**\n * @dev Returns the amount of tokens owned by `account`.\n */\n function balanceOf(address account) external view returns (uint256);\n\n /**\n * @dev Moves `amount` tokens from the caller's account to `to`.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transfer(address to, uint256 amount) external returns (bool);\n\n /**\n * @dev Returns the remaining number of tokens that `spender` will be\n * allowed to spend on behalf of `owner` through {transferFrom}. This is\n * zero by default.\n *\n * This value changes when {approve} or {transferFrom} are called.\n */\n function allowance(address owner, address spender) external view returns (uint256);\n\n /**\n * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * IMPORTANT: Beware that changing an allowance with this method brings the risk\n * that someone may use both the old and the new allowance by unfortunate\n * transaction ordering. One possible solution to mitigate this race\n * condition is to first reduce the spender's allowance to 0 and set the\n * desired value afterwards:\n * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n *\n * Emits an {Approval} event.\n */\n function approve(address spender, uint256 amount) external returns (bool);\n\n /**\n * @dev Moves `amount` tokens from `from` to `to` using the\n * allowance mechanism. `amount` is then deducted from the caller's\n * allowance.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transferFrom(\n address from,\n address to,\n uint256 amount\n ) external returns (bool);\n}\n"
},
"@openzeppelin/contracts/utils/Address.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)\n\npragma solidity ^0.8.1;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length > 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCall(target, data, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance >= value, \"Address: insufficient balance for call\");\n require(isContract(target), \"Address: call to non-contract\");\n\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n require(isContract(target), \"Address: static call to non-contract\");\n\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(isContract(target), \"Address: delegate call to non-contract\");\n\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n // Look for revert reason and bubble it up if present\n if (returndata.length > 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n }\n}\n"
},
"@openzeppelin/contracts/token/ERC20/extensions/draft-IERC20Permit.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/draft-IERC20Permit.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in\n * https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].\n *\n * Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by\n * presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't\n * need to send a transaction, and thus is not required to hold Ether at all.\n */\ninterface IERC20Permit {\n /**\n * @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,\n * given ``owner``'s signed approval.\n *\n * IMPORTANT: The same issues {IERC20-approve} has related to transaction\n * ordering also apply here.\n *\n * Emits an {Approval} event.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n * - `deadline` must be a timestamp in the future.\n * - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`\n * over the EIP712-formatted function arguments.\n * - the signature must use ``owner``'s current nonce (see {nonces}).\n *\n * For more information on the signature format, see the\n * https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP\n * section].\n */\n function permit(\n address owner,\n address spender,\n uint256 value,\n uint256 deadline,\n uint8 v,\n bytes32 r,\n bytes32 s\n ) external;\n\n /**\n * @dev Returns the current nonce for `owner`. This value must be\n * included whenever a signature is generated for {permit}.\n *\n * Every successful call to {permit} increases ``owner``'s nonce by one. This\n * prevents a signature from being used multiple times.\n */\n function nonces(address owner) external view returns (uint256);\n\n /**\n * @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.\n */\n // solhint-disable-next-line func-name-mixedcase\n function DOMAIN_SEPARATOR() external view returns (bytes32);\n}\n"
},
"@openzeppelin/contracts/access/IAccessControl.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev External interface of AccessControl declared to support ERC165 detection.\n */\ninterface IAccessControl {\n /**\n * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`\n *\n * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite\n * {RoleAdminChanged} not being emitted signaling this.\n *\n * _Available since v3.1._\n */\n event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);\n\n /**\n * @dev Emitted when `account` is granted `role`.\n *\n * `sender` is the account that originated the contract call, an admin role\n * bearer except when using {AccessControl-_setupRole}.\n */\n event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);\n\n /**\n * @dev Emitted when `account` is revoked `role`.\n *\n * `sender` is the account that originated the contract call:\n * - if using `revokeRole`, it is the admin role bearer\n * - if using `renounceRole`, it is the role bearer (i.e. `account`)\n */\n event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);\n\n /**\n * @dev Returns `true` if `account` has been granted `role`.\n */\n function hasRole(bytes32 role, address account) external view returns (bool);\n\n /**\n * @dev Returns the admin role that controls `role`. See {grantRole} and\n * {revokeRole}.\n *\n * To change a role's admin, use {AccessControl-_setRoleAdmin}.\n */\n function getRoleAdmin(bytes32 role) external view returns (bytes32);\n\n /**\n * @dev Grants `role` to `account`.\n *\n * If `account` had not been already granted `role`, emits a {RoleGranted}\n * event.\n *\n * Requirements:\n *\n * - the caller must have ``role``'s admin role.\n */\n function grantRole(bytes32 role, address account) external;\n\n /**\n * @dev Revokes `role` from `account`.\n *\n * If `account` had been granted `role`, emits a {RoleRevoked} event.\n *\n * Requirements:\n *\n * - the caller must have ``role``'s admin role.\n */\n function revokeRole(bytes32 role, address account) external;\n\n /**\n * @dev Revokes `role` from the calling account.\n *\n * Roles are often managed via {grantRole} and {revokeRole}: this function's\n * purpose is to provide a mechanism for accounts to lose their privileges\n * if they are compromised (such as when a trusted device is misplaced).\n *\n * If the calling account had been granted `role`, emits a {RoleRevoked}\n * event.\n *\n * Requirements:\n *\n * - the caller must be `account`.\n */\n function renounceRole(bytes32 role, address account) external;\n}\n"
},
"@openzeppelin/contracts/utils/Strings.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (utils/Strings.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev String operations.\n */\nlibrary Strings {\n bytes16 private constant _HEX_SYMBOLS = \"0123456789abcdef\";\n uint8 private constant _ADDRESS_LENGTH = 20;\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` decimal representation.\n */\n function toString(uint256 value) internal pure returns (string memory) {\n // Inspired by OraclizeAPI's implementation - MIT licence\n // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol\n\n if (value == 0) {\n return \"0\";\n }\n uint256 temp = value;\n uint256 digits;\n while (temp != 0) {\n digits++;\n temp /= 10;\n }\n bytes memory buffer = new bytes(digits);\n while (value != 0) {\n digits -= 1;\n buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));\n value /= 10;\n }\n return string(buffer);\n }\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.\n */\n function toHexString(uint256 value) internal pure returns (string memory) {\n if (value == 0) {\n return \"0x00\";\n }\n uint256 temp = value;\n uint256 length = 0;\n while (temp != 0) {\n length++;\n temp >>= 8;\n }\n return toHexString(value, length);\n }\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.\n */\n function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {\n bytes memory buffer = new bytes(2 * length + 2);\n buffer[0] = \"0\";\n buffer[1] = \"x\";\n for (uint256 i = 2 * length + 1; i > 1; --i) {\n buffer[i] = _HEX_SYMBOLS[value & 0xf];\n value >>= 4;\n }\n require(value == 0, \"Strings: hex length insufficient\");\n return string(buffer);\n }\n\n /**\n * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.\n */\n function toHexString(address addr) internal pure returns (string memory) {\n return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);\n }\n}\n"
},
"@openzeppelin/contracts/utils/introspection/ERC165.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IERC165.sol\";\n\n/**\n * @dev Implementation of the {IERC165} interface.\n *\n * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check\n * for the additional interface id that will be supported. For example:\n *\n * ```solidity\n * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);\n * }\n * ```\n *\n * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.\n */\nabstract contract ERC165 is IERC165 {\n /**\n * @dev See {IERC165-supportsInterface}.\n */\n function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n return interfaceId == type(IERC165).interfaceId;\n }\n}\n"
},
"@openzeppelin/contracts/utils/introspection/IERC165.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC165 standard, as defined in the\n * https://eips.ethereum.org/EIPS/eip-165[EIP].\n *\n * Implementers can declare support of contract interfaces, which can then be\n * queried by others ({ERC165Checker}).\n *\n * For an implementation, see {ERC165}.\n */\ninterface IERC165 {\n /**\n * @dev Returns true if this contract implements the interface defined by\n * `interfaceId`. See the corresponding\n * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]\n * to learn more about how these ids are created.\n *\n * This function call must use less than 30 000 gas.\n */\n function supportsInterface(bytes4 interfaceId) external view returns (bool);\n}\n"
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