{"sources":{"@openzeppelin/contracts-5/token/ERC20/IERC20.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)\n\npragma solidity ^0.8.20;\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 value of tokens in existence.\n */\n function totalSupply() external view returns (uint256);\n\n /**\n * @dev Returns the value of tokens owned by `account`.\n */\n function balanceOf(address account) external view returns (uint256);\n\n /**\n * @dev Moves a `value` amount of 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 value) 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 a `value` amount of tokens as the allowance of `spender` over the\n * 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 value) external returns (bool);\n\n /**\n * @dev Moves a `value` amount of tokens from `from` to `to` using the\n * allowance mechanism. `value` 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(address from, address to, uint256 value) external returns (bool);\n}\n"},"@openzeppelin/contracts-5/token/ERC20/extensions/IERC20Metadata.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Metadata.sol)\n\npragma solidity ^0.8.20;\n\nimport {IERC20} from \"../IERC20.sol\";\n\n/**\n * @dev Interface for the optional metadata functions from the ERC20 standard.\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-5/utils/math/Math.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/Math.sol)\n\npragma solidity ^0.8.20;\n\n/**\n * @dev Standard math utilities missing in the Solidity language.\n */\nlibrary Math {\n /**\n * @dev Muldiv operation overflow.\n */\n error MathOverflowedMulDiv();\n\n enum Rounding {\n Floor, // Toward negative infinity\n Ceil, // Toward positive infinity\n Trunc, // Toward zero\n Expand // Away from zero\n }\n\n /**\n * @dev Returns the addition of two unsigned integers, with an overflow flag.\n */\n function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n uint256 c = a + b;\n if (c < a) return (false, 0);\n return (true, c);\n }\n }\n\n /**\n * @dev Returns the subtraction of two unsigned integers, with an overflow flag.\n */\n function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n if (b > a) return (false, 0);\n return (true, a - b);\n }\n }\n\n /**\n * @dev Returns the multiplication of two unsigned integers, with an overflow flag.\n */\n function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n // Gas optimization: this is cheaper than requiring 'a' not being zero, but the\n // benefit is lost if 'b' is also tested.\n // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522\n if (a == 0) return (true, 0);\n uint256 c = a * b;\n if (c / a != b) return (false, 0);\n return (true, c);\n }\n }\n\n /**\n * @dev Returns the division of two unsigned integers, with a division by zero flag.\n */\n function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n if (b == 0) return (false, 0);\n return (true, a / b);\n }\n }\n\n /**\n * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.\n */\n function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {\n unchecked {\n if (b == 0) return (false, 0);\n return (true, a % b);\n }\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 towards infinity instead\n * of rounding towards zero.\n */\n function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {\n if (b == 0) {\n // Guarantee the same behavior as in a regular Solidity division.\n return a / b;\n }\n\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\n * denominator == 0.\n * @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by\n * Uniswap Labs also under MIT license.\n */\n function mulDiv(uint256 x, uint256 y, uint256 denominator) 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 = x * y; // 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 prod1 := sub(sub(mm, prod0), lt(mm, prod0))\n }\n\n // Handle non-overflow cases, 256 by 256 division.\n if (prod1 == 0) {\n // Solidity will revert if denominator == 0, unlike the div opcode on its own.\n // The surrounding unchecked block does not change this fact.\n // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.\n return prod0 / denominator;\n }\n\n // Make sure the result is less than 2^256. Also prevents denominator == 0.\n if (denominator <= prod1) {\n revert MathOverflowedMulDiv();\n }\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.\n // Always >= 1. See https://cs.stackexchange.com/q/138556/92363.\n\n uint256 twos = denominator & (0 - denominator);\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\n // works 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(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {\n uint256 result = mulDiv(x, y, denominator);\n if (unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0) {\n result += 1;\n }\n return result;\n }\n\n /**\n * @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded\n * towards zero.\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 //\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)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.\n //\n // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`\n // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`\n // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`\n //\n // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.\n uint256 result = 1 << (log2(a) >> 1);\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 unchecked {\n uint256 result = sqrt(a);\n return result + (unsignedRoundsUp(rounding) && result * result < a ? 1 : 0);\n }\n }\n\n /**\n * @dev Return the log in base 2 of a positive value rounded towards zero.\n * Returns 0 if given 0.\n */\n function log2(uint256 value) internal pure returns (uint256) {\n uint256 result = 0;\n unchecked {\n if (value >> 128 > 0) {\n value >>= 128;\n result += 128;\n }\n if (value >> 64 > 0) {\n value >>= 64;\n result += 64;\n }\n if (value >> 32 > 0) {\n value >>= 32;\n result += 32;\n }\n if (value >> 16 > 0) {\n value >>= 16;\n result += 16;\n }\n if (value >> 8 > 0) {\n value >>= 8;\n result += 8;\n }\n if (value >> 4 > 0) {\n value >>= 4;\n result += 4;\n }\n if (value >> 2 > 0) {\n value >>= 2;\n result += 2;\n }\n if (value >> 1 > 0) {\n result += 1;\n }\n }\n return result;\n }\n\n /**\n * @dev Return the log in base 2, following the selected rounding direction, of a positive value.\n * Returns 0 if given 0.\n */\n function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {\n unchecked {\n uint256 result = log2(value);\n return result + (unsignedRoundsUp(rounding) && 1 << result < value ? 1 : 0);\n }\n }\n\n /**\n * @dev Return the log in base 10 of a positive value rounded towards zero.\n * Returns 0 if given 0.\n */\n function log10(uint256 value) internal pure returns (uint256) {\n uint256 result = 0;\n unchecked {\n if (value >= 10 ** 64) {\n value /= 10 ** 64;\n result += 64;\n }\n if (value >= 10 ** 32) {\n value /= 10 ** 32;\n result += 32;\n }\n if (value >= 10 ** 16) {\n value /= 10 ** 16;\n result += 16;\n }\n if (value >= 10 ** 8) {\n value /= 10 ** 8;\n result += 8;\n }\n if (value >= 10 ** 4) {\n value /= 10 ** 4;\n result += 4;\n }\n if (value >= 10 ** 2) {\n value /= 10 ** 2;\n result += 2;\n }\n if (value >= 10 ** 1) {\n result += 1;\n }\n }\n return result;\n }\n\n /**\n * @dev Return the log in base 10, following the selected rounding direction, of a positive value.\n * Returns 0 if given 0.\n */\n function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {\n unchecked {\n uint256 result = log10(value);\n return result + (unsignedRoundsUp(rounding) && 10 ** result < value ? 1 : 0);\n }\n }\n\n /**\n * @dev Return the log in base 256 of a positive value rounded towards zero.\n * Returns 0 if given 0.\n *\n * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.\n */\n function log256(uint256 value) internal pure returns (uint256) {\n uint256 result = 0;\n unchecked {\n if (value >> 128 > 0) {\n value >>= 128;\n result += 16;\n }\n if (value >> 64 > 0) {\n value >>= 64;\n result += 8;\n }\n if (value >> 32 > 0) {\n value >>= 32;\n result += 4;\n }\n if (value >> 16 > 0) {\n value >>= 16;\n result += 2;\n }\n if (value >> 8 > 0) {\n result += 1;\n }\n }\n return result;\n }\n\n /**\n * @dev Return the log in base 256, following the selected rounding direction, of a positive value.\n * Returns 0 if given 0.\n */\n function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {\n unchecked {\n uint256 result = log256(value);\n return result + (unsignedRoundsUp(rounding) && 1 << (result << 3) < value ? 1 : 0);\n }\n }\n\n /**\n * @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers.\n */\n function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) {\n return uint8(rounding) % 2 == 1;\n }\n}\n"},"@openzeppelin/contracts-upgradeable-493/access/AccessControlUpgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (access/AccessControl.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IAccessControlUpgradeable.sol\";\nimport \"../utils/ContextUpgradeable.sol\";\nimport \"../utils/StringsUpgradeable.sol\";\nimport \"../utils/introspection/ERC165Upgradeable.sol\";\nimport {Initializable} from \"../proxy/utils/Initializable.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 * ```solidity\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 * ```solidity\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. We recommend using {AccessControlDefaultAdminRules}\n * to enforce additional security measures for this role.\n */\nabstract contract AccessControlUpgradeable is Initializable, ContextUpgradeable, IAccessControlUpgradeable, ERC165Upgradeable {\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})$/\n *\n * _Available since v4.1._\n */\n modifier onlyRole(bytes32 role) {\n _checkRole(role);\n _;\n }\n\n function __AccessControl_init() internal onlyInitializing {\n }\n\n function __AccessControl_init_unchained() internal onlyInitializing {\n }\n /**\n * @dev See {IERC165-supportsInterface}.\n */\n function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n return interfaceId == type(IAccessControlUpgradeable).interfaceId || super.supportsInterface(interfaceId);\n }\n\n /**\n * @dev Returns `true` if `account` has been granted `role`.\n */\n function hasRole(bytes32 role, address account) public view virtual override returns (bool) {\n return _roles[role].members[account];\n }\n\n /**\n * @dev Revert with a standard message if `_msgSender()` is missing `role`.\n * Overriding this function changes the behavior of the {onlyRole} modifier.\n *\n * Format of the revert message is described in {_checkRole}.\n *\n * _Available since v4.6._\n */\n function _checkRole(bytes32 role) internal view virtual {\n _checkRole(role, _msgSender());\n }\n\n /**\n * @dev Revert with a standard message if `account` is missing `role`.\n *\n * The format of the revert reason is given by the following regular expression:\n *\n * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/\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 StringsUpgradeable.toHexString(account),\n \" is missing role \",\n StringsUpgradeable.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 /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n"},"@openzeppelin/contracts-upgradeable-493/access/IAccessControlUpgradeable.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 IAccessControlUpgradeable {\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-upgradeable-493/interfaces/IERC4626Upgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (interfaces/IERC4626.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../token/ERC20/IERC20Upgradeable.sol\";\nimport \"../token/ERC20/extensions/IERC20MetadataUpgradeable.sol\";\n\n/**\n * @dev Interface of the ERC4626 \"Tokenized Vault Standard\", as defined in\n * https://eips.ethereum.org/EIPS/eip-4626[ERC-4626].\n *\n * _Available since v4.7._\n */\ninterface IERC4626Upgradeable is IERC20Upgradeable, IERC20MetadataUpgradeable {\n event Deposit(address indexed sender, address indexed owner, uint256 assets, uint256 shares);\n\n event Withdraw(\n address indexed sender,\n address indexed receiver,\n address indexed owner,\n uint256 assets,\n uint256 shares\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 convertToShares(uint256 assets) external view returns (uint256 shares);\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 convertToAssets(uint256 shares) external view returns (uint256 assets);\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 Vault shares that can be minted for the receiver, through a mint call.\n * - MUST return a limited value if receiver is subject to some mint limit.\n * - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of shares that may be minted.\n * - MUST NOT revert.\n */\n function maxMint(address receiver) external view returns (uint256 maxShares);\n\n /**\n * @dev Allows an on-chain or off-chain user to simulate the effects of their mint at the current block, given\n * current on-chain conditions.\n *\n * - MUST return as close to and no fewer than the exact amount of assets that would be deposited in a mint call\n * in the same transaction. I.e. mint should return the same or fewer assets as previewMint if called in the\n * same transaction.\n * - MUST NOT account for mint limits like those returned from maxMint and should always act as though the mint\n * 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 convertToAssets and previewMint SHOULD be considered slippage in\n * share price or some other type of condition, meaning the depositor will lose assets by minting.\n */\n function previewMint(uint256 shares) external view returns (uint256 assets);\n\n /**\n * @dev Mints exactly shares Vault shares to receiver by depositing 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 mint\n * execution, and are accounted for during mint.\n * - MUST revert if all of shares cannot be minted (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 mint(uint256 shares, address receiver) external returns (uint256 assets);\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(uint256 assets, address receiver, address owner) external returns (uint256 shares);\n\n /**\n * @dev Returns the maximum amount of Vault shares that can be redeemed from the owner balance in the Vault,\n * through a redeem call.\n *\n * - MUST return a limited value if owner is subject to some withdrawal limit or timelock.\n * - MUST return balanceOf(owner) if owner is not subject to any withdrawal limit or timelock.\n * - MUST NOT revert.\n */\n function maxRedeem(address owner) external view returns (uint256 maxShares);\n\n /**\n * @dev Allows an on-chain or off-chain user to simulate the effects of their redeemption at the current block,\n * given current on-chain conditions.\n *\n * - MUST return as close to and no more than the exact amount of assets that would be withdrawn in a redeem call\n * in the same transaction. I.e. redeem should return the same or more assets as previewRedeem if called in the\n * same transaction.\n * - MUST NOT account for redemption limits like those returned from maxRedeem and should always act as though the\n * redemption 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 convertToAssets and previewRedeem SHOULD be considered slippage in\n * share price or some other type of condition, meaning the depositor will lose assets by redeeming.\n */\n function previewRedeem(uint256 shares) external view returns (uint256 assets);\n\n /**\n * @dev Burns exactly shares from owner and sends 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 * redeem execution, and are accounted for during redeem.\n * - MUST revert if all of shares cannot be redeemed (due to withdrawal limit being reached, slippage, the owner\n * not having enough shares, etc).\n *\n * NOTE: 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 redeem(uint256 shares, address receiver, address owner) external returns (uint256 assets);\n}\n"},"@openzeppelin/contracts-upgradeable-493/proxy/utils/Initializable.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (proxy/utils/Initializable.sol)\n\npragma solidity ^0.8.2;\n\nimport \"../../utils/AddressUpgradeable.sol\";\n\n/**\n * @dev This is a base contract to aid in writing upgradeable contracts, or any kind of contract that will be deployed\n * behind a proxy. Since proxied contracts do not make use of a constructor, it's common to move constructor logic to an\n * external initializer function, usually called `initialize`. It then becomes necessary to protect this initializer\n * function so it can only be called once. The {initializer} modifier provided by this contract will have this effect.\n *\n * The initialization functions use a version number. Once a version number is used, it is consumed and cannot be\n * reused. This mechanism prevents re-execution of each \"step\" but allows the creation of new initialization steps in\n * case an upgrade adds a module that needs to be initialized.\n *\n * For example:\n *\n * [.hljs-theme-light.nopadding]\n * ```solidity\n * contract MyToken is ERC20Upgradeable {\n * function initialize() initializer public {\n * __ERC20_init(\"MyToken\", \"MTK\");\n * }\n * }\n *\n * contract MyTokenV2 is MyToken, ERC20PermitUpgradeable {\n * function initializeV2() reinitializer(2) public {\n * __ERC20Permit_init(\"MyToken\");\n * }\n * }\n * ```\n *\n * TIP: To avoid leaving the proxy in an uninitialized state, the initializer function should be called as early as\n * possible by providing the encoded function call as the `_data` argument to {ERC1967Proxy-constructor}.\n *\n * CAUTION: When used with inheritance, manual care must be taken to not invoke a parent initializer twice, or to ensure\n * that all initializers are idempotent. This is not verified automatically as constructors are by Solidity.\n *\n * [CAUTION]\n * ====\n * Avoid leaving a contract uninitialized.\n *\n * An uninitialized contract can be taken over by an attacker. This applies to both a proxy and its implementation\n * contract, which may impact the proxy. To prevent the implementation contract from being used, you should invoke\n * the {_disableInitializers} function in the constructor to automatically lock it when it is deployed:\n *\n * [.hljs-theme-light.nopadding]\n * ```\n * /// @custom:oz-upgrades-unsafe-allow constructor\n * constructor() {\n * _disableInitializers();\n * }\n * ```\n * ====\n */\nabstract contract Initializable {\n /**\n * @dev Indicates that the contract has been initialized.\n * @custom:oz-retyped-from bool\n */\n uint8 private _initialized;\n\n /**\n * @dev Indicates that the contract is in the process of being initialized.\n */\n bool private _initializing;\n\n /**\n * @dev Triggered when the contract has been initialized or reinitialized.\n */\n event Initialized(uint8 version);\n\n /**\n * @dev A modifier that defines a protected initializer function that can be invoked at most once. In its scope,\n * `onlyInitializing` functions can be used to initialize parent contracts.\n *\n * Similar to `reinitializer(1)`, except that functions marked with `initializer` can be nested in the context of a\n * constructor.\n *\n * Emits an {Initialized} event.\n */\n modifier initializer() {\n bool isTopLevelCall = !_initializing;\n require(\n (isTopLevelCall && _initialized < 1) || (!AddressUpgradeable.isContract(address(this)) && _initialized == 1),\n \"Initializable: contract is already initialized\"\n );\n _initialized = 1;\n if (isTopLevelCall) {\n _initializing = true;\n }\n _;\n if (isTopLevelCall) {\n _initializing = false;\n emit Initialized(1);\n }\n }\n\n /**\n * @dev A modifier that defines a protected reinitializer function that can be invoked at most once, and only if the\n * contract hasn't been initialized to a greater version before. In its scope, `onlyInitializing` functions can be\n * used to initialize parent contracts.\n *\n * A reinitializer may be used after the original initialization step. This is essential to configure modules that\n * are added through upgrades and that require initialization.\n *\n * When `version` is 1, this modifier is similar to `initializer`, except that functions marked with `reinitializer`\n * cannot be nested. If one is invoked in the context of another, execution will revert.\n *\n * Note that versions can jump in increments greater than 1; this implies that if multiple reinitializers coexist in\n * a contract, executing them in the right order is up to the developer or operator.\n *\n * WARNING: setting the version to 255 will prevent any future reinitialization.\n *\n * Emits an {Initialized} event.\n */\n modifier reinitializer(uint8 version) {\n require(!_initializing && _initialized < version, \"Initializable: contract is already initialized\");\n _initialized = version;\n _initializing = true;\n _;\n _initializing = false;\n emit Initialized(version);\n }\n\n /**\n * @dev Modifier to protect an initialization function so that it can only be invoked by functions with the\n * {initializer} and {reinitializer} modifiers, directly or indirectly.\n */\n modifier onlyInitializing() {\n require(_initializing, \"Initializable: contract is not initializing\");\n _;\n }\n\n /**\n * @dev Locks the contract, preventing any future reinitialization. This cannot be part of an initializer call.\n * Calling this in the constructor of a contract will prevent that contract from being initialized or reinitialized\n * to any version. It is recommended to use this to lock implementation contracts that are designed to be called\n * through proxies.\n *\n * Emits an {Initialized} event the first time it is successfully executed.\n */\n function _disableInitializers() internal virtual {\n require(!_initializing, \"Initializable: contract is initializing\");\n if (_initialized != type(uint8).max) {\n _initialized = type(uint8).max;\n emit Initialized(type(uint8).max);\n }\n }\n\n /**\n * @dev Returns the highest version that has been initialized. See {reinitializer}.\n */\n function _getInitializedVersion() internal view returns (uint8) {\n return _initialized;\n }\n\n /**\n * @dev Returns `true` if the contract is currently initializing. See {onlyInitializing}.\n */\n function _isInitializing() internal view returns (bool) {\n return _initializing;\n }\n}\n"},"@openzeppelin/contracts-upgradeable-493/token/ERC20/ERC20Upgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/ERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IERC20Upgradeable.sol\";\nimport \"./extensions/IERC20MetadataUpgradeable.sol\";\nimport \"../../utils/ContextUpgradeable.sol\";\nimport {Initializable} from \"../../proxy/utils/Initializable.sol\";\n\n/**\n * @dev Implementation of the {IERC20} interface.\n *\n * This implementation is agnostic to the way tokens are created. This means\n * that a supply mechanism has to be added in a derived contract using {_mint}.\n * For a generic mechanism see {ERC20PresetMinterPauser}.\n *\n * TIP: For a detailed writeup see our guide\n * https://forum.openzeppelin.com/t/how-to-implement-erc20-supply-mechanisms/226[How\n * to implement supply mechanisms].\n *\n * The default value of {decimals} is 18. To change this, you should override\n * this function so it returns a different value.\n *\n * We have followed general OpenZeppelin Contracts guidelines: functions revert\n * instead returning `false` on failure. This behavior is nonetheless\n * conventional and does not conflict with the expectations of ERC20\n * applications.\n *\n * Additionally, an {Approval} event is emitted on calls to {transferFrom}.\n * This allows applications to reconstruct the allowance for all accounts just\n * by listening to said events. Other implementations of the EIP may not emit\n * these events, as it isn't required by the specification.\n *\n * Finally, the non-standard {decreaseAllowance} and {increaseAllowance}\n * functions have been added to mitigate the well-known issues around setting\n * allowances. See {IERC20-approve}.\n */\ncontract ERC20Upgradeable is Initializable, ContextUpgradeable, IERC20Upgradeable, IERC20MetadataUpgradeable {\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 /**\n * @dev Sets the values for {name} and {symbol}.\n *\n * All two of these values are immutable: they can only be set once during\n * construction.\n */\n function __ERC20_init(string memory name_, string memory symbol_) internal onlyInitializing {\n __ERC20_init_unchained(name_, symbol_);\n }\n\n function __ERC20_init_unchained(string memory name_, string memory symbol_) internal onlyInitializing {\n _name = name_;\n _symbol = symbol_;\n }\n\n /**\n * @dev Returns the name of the token.\n */\n function name() public view virtual override returns (string memory) {\n return _name;\n }\n\n /**\n * @dev Returns the symbol of the token, usually a shorter version of the\n * name.\n */\n function symbol() public view virtual override returns (string memory) {\n return _symbol;\n }\n\n /**\n * @dev Returns the number of decimals used to get its user representation.\n * For example, if `decimals` equals `2`, a balance of `505` tokens should\n * be displayed to a user as `5.05` (`505 / 10 ** 2`).\n *\n * Tokens usually opt for a value of 18, imitating the relationship between\n * Ether and Wei. This is the default value returned by this function, unless\n * it's overridden.\n *\n * NOTE: This information is only used for _display_ purposes: it in\n * no way affects any of the arithmetic of the contract, including\n * {IERC20-balanceOf} and {IERC20-transfer}.\n */\n function decimals() public view virtual override returns (uint8) {\n return 18;\n }\n\n /**\n * @dev See {IERC20-totalSupply}.\n */\n function totalSupply() public view virtual override returns (uint256) {\n return _totalSupply;\n }\n\n /**\n * @dev See {IERC20-balanceOf}.\n */\n function balanceOf(address account) public view virtual override returns (uint256) {\n return _balances[account];\n }\n\n /**\n * @dev See {IERC20-transfer}.\n *\n * Requirements:\n *\n * - `to` cannot be the zero address.\n * - the caller must have a balance of at least `amount`.\n */\n function transfer(address to, uint256 amount) public virtual override returns (bool) {\n address owner = _msgSender();\n _transfer(owner, to, amount);\n return true;\n }\n\n /**\n * @dev See {IERC20-allowance}.\n */\n function allowance(address owner, address spender) public view virtual override returns (uint256) {\n return _allowances[owner][spender];\n }\n\n /**\n * @dev See {IERC20-approve}.\n *\n * NOTE: If `amount` is the maximum `uint256`, the allowance is not updated on\n * `transferFrom`. This is semantically equivalent to an infinite approval.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n */\n function approve(address spender, uint256 amount) public virtual override returns (bool) {\n address owner = _msgSender();\n _approve(owner, spender, amount);\n return true;\n }\n\n /**\n * @dev See {IERC20-transferFrom}.\n *\n * Emits an {Approval} event indicating the updated allowance. This is not\n * required by the EIP. See the note at the beginning of {ERC20}.\n *\n * NOTE: Does not update the allowance if the current allowance\n * is the maximum `uint256`.\n *\n * Requirements:\n *\n * - `from` and `to` cannot be the zero address.\n * - `from` must have a balance of at least `amount`.\n * - the caller must have allowance for ``from``'s tokens of at least\n * `amount`.\n */\n function transferFrom(address from, address to, uint256 amount) public virtual override returns (bool) {\n address spender = _msgSender();\n _spendAllowance(from, spender, amount);\n _transfer(from, to, amount);\n return true;\n }\n\n /**\n * @dev Atomically increases the allowance granted to `spender` by the caller.\n *\n * This is an alternative to {approve} that can be used as a mitigation for\n * problems described in {IERC20-approve}.\n *\n * Emits an {Approval} event indicating the updated allowance.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n */\n function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {\n address owner = _msgSender();\n _approve(owner, spender, allowance(owner, spender) + addedValue);\n return true;\n }\n\n /**\n * @dev Atomically decreases the allowance granted to `spender` by the caller.\n *\n * This is an alternative to {approve} that can be used as a mitigation for\n * problems described in {IERC20-approve}.\n *\n * Emits an {Approval} event indicating the updated allowance.\n *\n * Requirements:\n *\n * - `spender` cannot be the zero address.\n * - `spender` must have allowance for the caller of at least\n * `subtractedValue`.\n */\n function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {\n address owner = _msgSender();\n uint256 currentAllowance = allowance(owner, spender);\n require(currentAllowance >= subtractedValue, \"ERC20: decreased allowance below zero\");\n unchecked {\n _approve(owner, spender, currentAllowance - subtractedValue);\n }\n\n return true;\n }\n\n /**\n * @dev Moves `amount` of tokens from `from` to `to`.\n *\n * This internal function is equivalent to {transfer}, and can be used to\n * e.g. implement automatic token fees, slashing mechanisms, etc.\n *\n * Emits a {Transfer} event.\n *\n * Requirements:\n *\n * - `from` cannot be the zero address.\n * - `to` cannot be the zero address.\n * - `from` must have a balance of at least `amount`.\n */\n function _transfer(address from, address to, uint256 amount) internal virtual {\n require(from != address(0), \"ERC20: transfer from the zero address\");\n require(to != address(0), \"ERC20: transfer to the zero address\");\n\n _beforeTokenTransfer(from, to, amount);\n\n uint256 fromBalance = _balances[from];\n require(fromBalance >= amount, \"ERC20: transfer amount exceeds balance\");\n unchecked {\n _balances[from] = fromBalance - amount;\n // Overflow not possible: the sum of all balances is capped by totalSupply, and the sum is preserved by\n // decrementing then incrementing.\n _balances[to] += amount;\n }\n\n emit Transfer(from, to, amount);\n\n _afterTokenTransfer(from, to, amount);\n }\n\n /** @dev Creates `amount` tokens and assigns them to `account`, increasing\n * the total supply.\n *\n * Emits a {Transfer} event with `from` set to the zero address.\n *\n * Requirements:\n *\n * - `account` cannot be the zero address.\n */\n function _mint(address account, uint256 amount) internal virtual {\n require(account != address(0), \"ERC20: mint to the zero address\");\n\n _beforeTokenTransfer(address(0), account, amount);\n\n _totalSupply += amount;\n unchecked {\n // Overflow not possible: balance + amount is at most totalSupply + amount, which is checked above.\n _balances[account] += amount;\n }\n emit Transfer(address(0), account, amount);\n\n _afterTokenTransfer(address(0), account, amount);\n }\n\n /**\n * @dev Destroys `amount` tokens from `account`, reducing the\n * total supply.\n *\n * Emits a {Transfer} event with `to` set to the zero address.\n *\n * Requirements:\n *\n * - `account` cannot be the zero address.\n * - `account` must have at least `amount` tokens.\n */\n function _burn(address account, uint256 amount) internal virtual {\n require(account != address(0), \"ERC20: burn from the zero address\");\n\n _beforeTokenTransfer(account, address(0), amount);\n\n uint256 accountBalance = _balances[account];\n require(accountBalance >= amount, \"ERC20: burn amount exceeds balance\");\n unchecked {\n _balances[account] = accountBalance - amount;\n // Overflow not possible: amount <= accountBalance <= totalSupply.\n _totalSupply -= amount;\n }\n\n emit Transfer(account, address(0), amount);\n\n _afterTokenTransfer(account, address(0), amount);\n }\n\n /**\n * @dev Sets `amount` as the allowance of `spender` over the `owner` s tokens.\n *\n * This internal function is equivalent to `approve`, and can be used to\n * e.g. set automatic allowances for certain subsystems, etc.\n *\n * Emits an {Approval} event.\n *\n * Requirements:\n *\n * - `owner` cannot be the zero address.\n * - `spender` cannot be the zero address.\n */\n function _approve(address owner, address spender, uint256 amount) internal virtual {\n require(owner != address(0), \"ERC20: approve from the zero address\");\n require(spender != address(0), \"ERC20: approve to the zero address\");\n\n _allowances[owner][spender] = amount;\n emit Approval(owner, spender, amount);\n }\n\n /**\n * @dev Updates `owner` s allowance for `spender` based on spent `amount`.\n *\n * Does not update the allowance amount in case of infinite allowance.\n * Revert if not enough allowance is available.\n *\n * Might emit an {Approval} event.\n */\n function _spendAllowance(address owner, address spender, uint256 amount) internal virtual {\n uint256 currentAllowance = allowance(owner, spender);\n if (currentAllowance != type(uint256).max) {\n require(currentAllowance >= amount, \"ERC20: insufficient allowance\");\n unchecked {\n _approve(owner, spender, currentAllowance - amount);\n }\n }\n }\n\n /**\n * @dev Hook that is called before any transfer of tokens. This includes\n * minting and burning.\n *\n * Calling conditions:\n *\n * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\n * will be transferred to `to`.\n * - when `from` is zero, `amount` tokens will be minted for `to`.\n * - when `to` is zero, `amount` of ``from``'s tokens will be burned.\n * - `from` and `to` are never both zero.\n *\n * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\n */\n function _beforeTokenTransfer(address from, address to, uint256 amount) internal virtual {}\n\n /**\n * @dev Hook that is called after any transfer of tokens. This includes\n * minting and burning.\n *\n * Calling conditions:\n *\n * - when `from` and `to` are both non-zero, `amount` of ``from``'s tokens\n * has been transferred to `to`.\n * - when `from` is zero, `amount` tokens have been minted for `to`.\n * - when `to` is zero, `amount` of ``from``'s tokens have been burned.\n * - `from` and `to` are never both zero.\n *\n * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks].\n */\n function _afterTokenTransfer(address from, address to, uint256 amount) internal virtual {}\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[45] private __gap;\n}\n"},"@openzeppelin/contracts-upgradeable-493/token/ERC20/IERC20Upgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (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 IERC20Upgradeable {\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(address from, address to, uint256 amount) external returns (bool);\n}\n"},"@openzeppelin/contracts-upgradeable-493/token/ERC20/extensions/ERC4626Upgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (token/ERC20/extensions/ERC4626.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../ERC20Upgradeable.sol\";\nimport \"../utils/SafeERC20Upgradeable.sol\";\nimport \"../../../interfaces/IERC4626Upgradeable.sol\";\nimport \"../../../utils/math/MathUpgradeable.sol\";\nimport {Initializable} from \"../../../proxy/utils/Initializable.sol\";\n\n/**\n * @dev Implementation of the ERC4626 \"Tokenized Vault Standard\" as defined in\n * https://eips.ethereum.org/EIPS/eip-4626[EIP-4626].\n *\n * This extension allows the minting and burning of \"shares\" (represented using the ERC20 inheritance) in exchange for\n * underlying \"assets\" through standardized {deposit}, {mint}, {redeem} and {burn} workflows. This contract extends\n * the ERC20 standard. Any additional extensions included along it would affect the \"shares\" token represented by this\n * contract and not the \"assets\" token which is an independent contract.\n *\n * [CAUTION]\n * ====\n * In empty (or nearly empty) ERC-4626 vaults, deposits are at high risk of being stolen through frontrunning\n * with a \"donation\" to the vault that inflates the price of a share. This is variously known as a donation or inflation\n * attack and is essentially a problem of slippage. Vault deployers can protect against this attack by making an initial\n * deposit of a non-trivial amount of the asset, such that price manipulation becomes infeasible. Withdrawals may\n * similarly be affected by slippage. Users can protect against this attack as well as unexpected slippage in general by\n * verifying the amount received is as expected, using a wrapper that performs these checks such as\n * https://github.com/fei-protocol/ERC4626#erc4626router-and-base[ERC4626Router].\n *\n * Since v4.9, this implementation uses virtual assets and shares to mitigate that risk. The `_decimalsOffset()`\n * corresponds to an offset in the decimal representation between the underlying asset's decimals and the vault\n * decimals. This offset also determines the rate of virtual shares to virtual assets in the vault, which itself\n * determines the initial exchange rate. While not fully preventing the attack, analysis shows that the default offset\n * (0) makes it non-profitable, as a result of the value being captured by the virtual shares (out of the attacker's\n * donation) matching the attacker's expected gains. With a larger offset, the attack becomes orders of magnitude more\n * expensive than it is profitable. More details about the underlying math can be found\n * xref:erc4626.adoc#inflation-attack[here].\n *\n * The drawback of this approach is that the virtual shares do capture (a very small) part of the value being accrued\n * to the vault. Also, if the vault experiences losses, the users try to exit the vault, the virtual shares and assets\n * will cause the first user to exit to experience reduced losses in detriment to the last users that will experience\n * bigger losses. Developers willing to revert back to the pre-v4.9 behavior just need to override the\n * `_convertToShares` and `_convertToAssets` functions.\n *\n * To learn more, check out our xref:ROOT:erc4626.adoc[ERC-4626 guide].\n * ====\n *\n * _Available since v4.7._\n */\nabstract contract ERC4626Upgradeable is Initializable, ERC20Upgradeable, IERC4626Upgradeable {\n using MathUpgradeable for uint256;\n\n IERC20Upgradeable private _asset;\n uint8 private _underlyingDecimals;\n\n /**\n * @dev Set the underlying asset contract. This must be an ERC20-compatible contract (ERC20 or ERC777).\n */\n function __ERC4626_init(IERC20Upgradeable asset_) internal onlyInitializing {\n __ERC4626_init_unchained(asset_);\n }\n\n function __ERC4626_init_unchained(IERC20Upgradeable asset_) internal onlyInitializing {\n (bool success, uint8 assetDecimals) = _tryGetAssetDecimals(asset_);\n _underlyingDecimals = success ? assetDecimals : 18;\n _asset = asset_;\n }\n\n /**\n * @dev Attempts to fetch the asset decimals. A return value of false indicates that the attempt failed in some way.\n */\n function _tryGetAssetDecimals(IERC20Upgradeable asset_) private view returns (bool, uint8) {\n (bool success, bytes memory encodedDecimals) = address(asset_).staticcall(\n abi.encodeWithSelector(IERC20MetadataUpgradeable.decimals.selector)\n );\n if (success && encodedDecimals.length >= 32) {\n uint256 returnedDecimals = abi.decode(encodedDecimals, (uint256));\n if (returnedDecimals <= type(uint8).max) {\n return (true, uint8(returnedDecimals));\n }\n }\n return (false, 0);\n }\n\n /**\n * @dev Decimals are computed by adding the decimal offset on top of the underlying asset's decimals. This\n * \"original\" value is cached during construction of the vault contract. If this read operation fails (e.g., the\n * asset has not been created yet), a default of 18 is used to represent the underlying asset's decimals.\n *\n * See {IERC20Metadata-decimals}.\n */\n function decimals() public view virtual override(IERC20MetadataUpgradeable, ERC20Upgradeable) returns (uint8) {\n return _underlyingDecimals + _decimalsOffset();\n }\n\n /** @dev See {IERC4626-asset}. */\n function asset() public view virtual override returns (address) {\n return address(_asset);\n }\n\n /** @dev See {IERC4626-totalAssets}. */\n function totalAssets() public view virtual override returns (uint256) {\n return _asset.balanceOf(address(this));\n }\n\n /** @dev See {IERC4626-convertToShares}. */\n function convertToShares(uint256 assets) public view virtual override returns (uint256) {\n return _convertToShares(assets, MathUpgradeable.Rounding.Down);\n }\n\n /** @dev See {IERC4626-convertToAssets}. */\n function convertToAssets(uint256 shares) public view virtual override returns (uint256) {\n return _convertToAssets(shares, MathUpgradeable.Rounding.Down);\n }\n\n /** @dev See {IERC4626-maxDeposit}. */\n function maxDeposit(address) public view virtual override returns (uint256) {\n return type(uint256).max;\n }\n\n /** @dev See {IERC4626-maxMint}. */\n function maxMint(address) public view virtual override returns (uint256) {\n return type(uint256).max;\n }\n\n /** @dev See {IERC4626-maxWithdraw}. */\n function maxWithdraw(address owner) public view virtual override returns (uint256) {\n return _convertToAssets(balanceOf(owner), MathUpgradeable.Rounding.Down);\n }\n\n /** @dev See {IERC4626-maxRedeem}. */\n function maxRedeem(address owner) public view virtual override returns (uint256) {\n return balanceOf(owner);\n }\n\n /** @dev See {IERC4626-previewDeposit}. */\n function previewDeposit(uint256 assets) public view virtual override returns (uint256) {\n return _convertToShares(assets, MathUpgradeable.Rounding.Down);\n }\n\n /** @dev See {IERC4626-previewMint}. */\n function previewMint(uint256 shares) public view virtual override returns (uint256) {\n return _convertToAssets(shares, MathUpgradeable.Rounding.Up);\n }\n\n /** @dev See {IERC4626-previewWithdraw}. */\n function previewWithdraw(uint256 assets) public view virtual override returns (uint256) {\n return _convertToShares(assets, MathUpgradeable.Rounding.Up);\n }\n\n /** @dev See {IERC4626-previewRedeem}. */\n function previewRedeem(uint256 shares) public view virtual override returns (uint256) {\n return _convertToAssets(shares, MathUpgradeable.Rounding.Down);\n }\n\n /** @dev See {IERC4626-deposit}. */\n function deposit(uint256 assets, address receiver) public virtual override returns (uint256) {\n require(assets <= maxDeposit(receiver), \"ERC4626: deposit more than max\");\n\n uint256 shares = previewDeposit(assets);\n _deposit(_msgSender(), receiver, assets, shares);\n\n return shares;\n }\n\n /** @dev See {IERC4626-mint}.\n *\n * As opposed to {deposit}, minting is allowed even if the vault is in a state where the price of a share is zero.\n * In this case, the shares will be minted without requiring any assets to be deposited.\n */\n function mint(uint256 shares, address receiver) public virtual override returns (uint256) {\n require(shares <= maxMint(receiver), \"ERC4626: mint more than max\");\n\n uint256 assets = previewMint(shares);\n _deposit(_msgSender(), receiver, assets, shares);\n\n return assets;\n }\n\n /** @dev See {IERC4626-withdraw}. */\n function withdraw(uint256 assets, address receiver, address owner) public virtual override returns (uint256) {\n require(assets <= maxWithdraw(owner), \"ERC4626: withdraw more than max\");\n\n uint256 shares = previewWithdraw(assets);\n _withdraw(_msgSender(), receiver, owner, assets, shares);\n\n return shares;\n }\n\n /** @dev See {IERC4626-redeem}. */\n function redeem(uint256 shares, address receiver, address owner) public virtual override returns (uint256) {\n require(shares <= maxRedeem(owner), \"ERC4626: redeem more than max\");\n\n uint256 assets = previewRedeem(shares);\n _withdraw(_msgSender(), receiver, owner, assets, shares);\n\n return assets;\n }\n\n /**\n * @dev Internal conversion function (from assets to shares) with support for rounding direction.\n */\n function _convertToShares(uint256 assets, MathUpgradeable.Rounding rounding) internal view virtual returns (uint256) {\n return assets.mulDiv(totalSupply() + 10 ** _decimalsOffset(), totalAssets() + 1, rounding);\n }\n\n /**\n * @dev Internal conversion function (from shares to assets) with support for rounding direction.\n */\n function _convertToAssets(uint256 shares, MathUpgradeable.Rounding rounding) internal view virtual returns (uint256) {\n return shares.mulDiv(totalAssets() + 1, totalSupply() + 10 ** _decimalsOffset(), rounding);\n }\n\n /**\n * @dev Deposit/mint common workflow.\n */\n function _deposit(address caller, address receiver, uint256 assets, uint256 shares) internal virtual {\n // If _asset is ERC777, `transferFrom` can trigger a reentrancy 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 // assets are transferred and before the shares are minted, which is a valid state.\n // slither-disable-next-line reentrancy-no-eth\n SafeERC20Upgradeable.safeTransferFrom(_asset, caller, address(this), assets);\n _mint(receiver, shares);\n\n emit Deposit(caller, receiver, assets, shares);\n }\n\n /**\n * @dev Withdraw/redeem common workflow.\n */\n function _withdraw(\n address caller,\n address receiver,\n address owner,\n uint256 assets,\n uint256 shares\n ) internal virtual {\n if (caller != owner) {\n _spendAllowance(owner, caller, shares);\n }\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 // shares are burned and after the assets are transferred, which is a valid state.\n _burn(owner, shares);\n SafeERC20Upgradeable.safeTransfer(_asset, receiver, assets);\n\n emit Withdraw(caller, receiver, owner, assets, shares);\n }\n\n function _decimalsOffset() internal view virtual returns (uint8) {\n return 0;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[49] private __gap;\n}\n"},"@openzeppelin/contracts-upgradeable-493/token/ERC20/extensions/IERC20MetadataUpgradeable.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 \"../IERC20Upgradeable.sol\";\n\n/**\n * @dev Interface for the optional metadata functions from the ERC20 standard.\n *\n * _Available since v4.1._\n */\ninterface IERC20MetadataUpgradeable is IERC20Upgradeable {\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-upgradeable-493/token/ERC20/extensions/IERC20PermitUpgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.4) (token/ERC20/extensions/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 *\n * ==== Security Considerations\n *\n * There are two important considerations concerning the use of `permit`. The first is that a valid permit signature\n * expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be\n * considered as an intention to spend the allowance in any specific way. The second is that because permits have\n * built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should\n * take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be\n * generally recommended is:\n *\n * ```solidity\n * function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {\n * try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}\n * doThing(..., value);\n * }\n *\n * function doThing(..., uint256 value) public {\n * token.safeTransferFrom(msg.sender, address(this), value);\n * ...\n * }\n * ```\n *\n * Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of\n * `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also\n * {SafeERC20-safeTransferFrom}).\n *\n * Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so\n * contracts should have entry points that don't rely on permit.\n */\ninterface IERC20PermitUpgradeable {\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 * CAUTION: See Security Considerations above.\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-upgradeable-493/token/ERC20/utils/SafeERC20Upgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.3) (token/ERC20/utils/SafeERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20Upgradeable.sol\";\nimport \"../extensions/IERC20PermitUpgradeable.sol\";\nimport \"../../../utils/AddressUpgradeable.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 SafeERC20Upgradeable {\n using AddressUpgradeable for address;\n\n /**\n * @dev Transfer `value` amount of `token` from the calling contract to `to`. If `token` returns no value,\n * non-reverting calls are assumed to be successful.\n */\n function safeTransfer(IERC20Upgradeable token, address to, uint256 value) internal {\n _callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));\n }\n\n /**\n * @dev Transfer `value` amount of `token` from `from` to `to`, spending the approval given by `from` to the\n * calling contract. If `token` returns no value, non-reverting calls are assumed to be successful.\n */\n function safeTransferFrom(IERC20Upgradeable token, address from, address to, uint256 value) 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(IERC20Upgradeable token, address spender, uint256 value) 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 /**\n * @dev Increase the calling contract's allowance toward `spender` by `value`. If `token` returns no value,\n * non-reverting calls are assumed to be successful.\n */\n function safeIncreaseAllowance(IERC20Upgradeable token, address spender, uint256 value) internal {\n uint256 oldAllowance = token.allowance(address(this), spender);\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance + value));\n }\n\n /**\n * @dev Decrease the calling contract's allowance toward `spender` by `value`. If `token` returns no value,\n * non-reverting calls are assumed to be successful.\n */\n function safeDecreaseAllowance(IERC20Upgradeable token, address spender, uint256 value) internal {\n unchecked {\n uint256 oldAllowance = token.allowance(address(this), spender);\n require(oldAllowance >= value, \"SafeERC20: decreased allowance below zero\");\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, oldAllowance - value));\n }\n }\n\n /**\n * @dev Set the calling contract's allowance toward `spender` to `value`. If `token` returns no value,\n * non-reverting calls are assumed to be successful. Meant to be used with tokens that require the approval\n * to be set to zero before setting it to a non-zero value, such as USDT.\n */\n function forceApprove(IERC20Upgradeable token, address spender, uint256 value) internal {\n bytes memory approvalCall = abi.encodeWithSelector(token.approve.selector, spender, value);\n\n if (!_callOptionalReturnBool(token, approvalCall)) {\n _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, 0));\n _callOptionalReturn(token, approvalCall);\n }\n }\n\n /**\n * @dev Use a ERC-2612 signature to set the `owner` approval toward `spender` on `token`.\n * Revert on invalid signature.\n */\n function safePermit(\n IERC20PermitUpgradeable 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(IERC20Upgradeable 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 require(returndata.length == 0 || abi.decode(returndata, (bool)), \"SafeERC20: ERC20 operation 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 * This is a variant of {_callOptionalReturn} that silents catches all reverts and returns a bool instead.\n */\n function _callOptionalReturnBool(IERC20Upgradeable token, bytes memory data) private returns (bool) {\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 cannot use {Address-functionCall} here since this should return false\n // and not revert is the subcall reverts.\n\n (bool success, bytes memory returndata) = address(token).call(data);\n return\n success && (returndata.length == 0 || abi.decode(returndata, (bool))) && AddressUpgradeable.isContract(address(token));\n }\n}\n"},"@openzeppelin/contracts-upgradeable-493/utils/AddressUpgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Address.sol)\n\npragma solidity ^0.8.1;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary AddressUpgradeable {\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 * Furthermore, `isContract` will also return true if the target contract within\n * the same transaction is already scheduled for destruction by `SELFDESTRUCT`,\n * which only has an effect at the end of a transaction.\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://consensys.net/diligence/blog/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/v0.8.0/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 functionCallWithValue(target, data, 0, \"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(address target, bytes memory data, uint256 value) 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 (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResultFromTarget(target, 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 (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResultFromTarget(target, 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 (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResultFromTarget(target, success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling\n * the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.\n *\n * _Available since v4.8._\n */\n function verifyCallResultFromTarget(\n address target,\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n if (success) {\n if (returndata.length == 0) {\n // only check isContract if the call was successful and the return data is empty\n // otherwise we already know that it was a contract\n require(isContract(target), \"Address: call to non-contract\");\n }\n return returndata;\n } else {\n _revert(returndata, errorMessage);\n }\n }\n\n /**\n * @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason or 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 _revert(returndata, errorMessage);\n }\n }\n\n function _revert(bytes memory returndata, string memory errorMessage) private pure {\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"},"@openzeppelin/contracts-upgradeable-493/utils/ContextUpgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.4) (utils/Context.sol)\n\npragma solidity ^0.8.0;\nimport {Initializable} from \"../proxy/utils/Initializable.sol\";\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 ContextUpgradeable is Initializable {\n function __Context_init() internal onlyInitializing {\n }\n\n function __Context_init_unchained() internal onlyInitializing {\n }\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 function _contextSuffixLength() internal view virtual returns (uint256) {\n return 0;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[50] private __gap;\n}\n"},"@openzeppelin/contracts-upgradeable-493/utils/StringsUpgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/Strings.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./math/MathUpgradeable.sol\";\nimport \"./math/SignedMathUpgradeable.sol\";\n\n/**\n * @dev String operations.\n */\nlibrary StringsUpgradeable {\n bytes16 private constant _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 unchecked {\n uint256 length = MathUpgradeable.log10(value) + 1;\n string memory buffer = new string(length);\n uint256 ptr;\n /// @solidity memory-safe-assembly\n assembly {\n ptr := add(buffer, add(32, length))\n }\n while (true) {\n ptr--;\n /// @solidity memory-safe-assembly\n assembly {\n mstore8(ptr, byte(mod(value, 10), _SYMBOLS))\n }\n value /= 10;\n if (value == 0) break;\n }\n return buffer;\n }\n }\n\n /**\n * @dev Converts a `int256` to its ASCII `string` decimal representation.\n */\n function toString(int256 value) internal pure returns (string memory) {\n return string(abi.encodePacked(value < 0 ? \"-\" : \"\", toString(SignedMathUpgradeable.abs(value))));\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 unchecked {\n return toHexString(value, MathUpgradeable.log256(value) + 1);\n }\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] = _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 /**\n * @dev Returns true if the two strings are equal.\n */\n function equal(string memory a, string memory b) internal pure returns (bool) {\n return keccak256(bytes(a)) == keccak256(bytes(b));\n }\n}\n"},"@openzeppelin/contracts-upgradeable-493/utils/introspection/ERC165Upgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IERC165Upgradeable.sol\";\nimport {Initializable} from \"../../proxy/utils/Initializable.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 ERC165Upgradeable is Initializable, IERC165Upgradeable {\n function __ERC165_init() internal onlyInitializing {\n }\n\n function __ERC165_init_unchained() internal onlyInitializing {\n }\n /**\n * @dev See {IERC165-supportsInterface}.\n */\n function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n return interfaceId == type(IERC165Upgradeable).interfaceId;\n }\n\n /**\n * @dev This empty reserved space is put in place to allow future versions to add new\n * variables without shifting down storage in the inheritance chain.\n * See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps\n */\n uint256[50] private __gap;\n}\n"},"@openzeppelin/contracts-upgradeable-493/utils/introspection/IERC165Upgradeable.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 IERC165Upgradeable {\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"},"@openzeppelin/contracts-upgradeable-493/utils/math/MathUpgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.9.0) (utils/math/Math.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Standard math utilities missing in the Solidity language.\n */\nlibrary MathUpgradeable {\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(uint256 x, uint256 y, uint256 denominator) 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 // Solidity will revert if denominator == 0, unlike the div opcode on its own.\n // The surrounding unchecked block does not change this fact.\n // See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.\n return prod0 / denominator;\n }\n\n // Make sure the result is less than 2^256. Also prevents denominator == 0.\n require(denominator > prod1, \"Math: mulDiv overflow\");\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(uint256 x, uint256 y, uint256 denominator, Rounding rounding) 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. If 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 //\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)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.\n //\n // This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`\n // → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`\n // → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`\n //\n // Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.\n uint256 result = 1 << (log2(a) >> 1);\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 unchecked {\n uint256 result = sqrt(a);\n return result + (rounding == Rounding.Up && result * result < a ? 1 : 0);\n }\n }\n\n /**\n * @dev Return the log in base 2, rounded down, of a positive value.\n * Returns 0 if given 0.\n */\n function log2(uint256 value) internal pure returns (uint256) {\n uint256 result = 0;\n unchecked {\n if (value >> 128 > 0) {\n value >>= 128;\n result += 128;\n }\n if (value >> 64 > 0) {\n value >>= 64;\n result += 64;\n }\n if (value >> 32 > 0) {\n value >>= 32;\n result += 32;\n }\n if (value >> 16 > 0) {\n value >>= 16;\n result += 16;\n }\n if (value >> 8 > 0) {\n value >>= 8;\n result += 8;\n }\n if (value >> 4 > 0) {\n value >>= 4;\n result += 4;\n }\n if (value >> 2 > 0) {\n value >>= 2;\n result += 2;\n }\n if (value >> 1 > 0) {\n result += 1;\n }\n }\n return result;\n }\n\n /**\n * @dev Return the log in base 2, following the selected rounding direction, of a positive value.\n * Returns 0 if given 0.\n */\n function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {\n unchecked {\n uint256 result = log2(value);\n return result + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);\n }\n }\n\n /**\n * @dev Return the log in base 10, rounded down, of a positive value.\n * Returns 0 if given 0.\n */\n function log10(uint256 value) internal pure returns (uint256) {\n uint256 result = 0;\n unchecked {\n if (value >= 10 ** 64) {\n value /= 10 ** 64;\n result += 64;\n }\n if (value >= 10 ** 32) {\n value /= 10 ** 32;\n result += 32;\n }\n if (value >= 10 ** 16) {\n value /= 10 ** 16;\n result += 16;\n }\n if (value >= 10 ** 8) {\n value /= 10 ** 8;\n result += 8;\n }\n if (value >= 10 ** 4) {\n value /= 10 ** 4;\n result += 4;\n }\n if (value >= 10 ** 2) {\n value /= 10 ** 2;\n result += 2;\n }\n if (value >= 10 ** 1) {\n result += 1;\n }\n }\n return result;\n }\n\n /**\n * @dev Return the log in base 10, following the selected rounding direction, of a positive value.\n * Returns 0 if given 0.\n */\n function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {\n unchecked {\n uint256 result = log10(value);\n return result + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);\n }\n }\n\n /**\n * @dev Return the log in base 256, rounded down, of a positive value.\n * Returns 0 if given 0.\n *\n * Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.\n */\n function log256(uint256 value) internal pure returns (uint256) {\n uint256 result = 0;\n unchecked {\n if (value >> 128 > 0) {\n value >>= 128;\n result += 16;\n }\n if (value >> 64 > 0) {\n value >>= 64;\n result += 8;\n }\n if (value >> 32 > 0) {\n value >>= 32;\n result += 4;\n }\n if (value >> 16 > 0) {\n value >>= 16;\n result += 2;\n }\n if (value >> 8 > 0) {\n result += 1;\n }\n }\n return result;\n }\n\n /**\n * @dev Return the log in base 256, following the selected rounding direction, of a positive value.\n * Returns 0 if given 0.\n */\n function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {\n unchecked {\n uint256 result = log256(value);\n return result + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);\n }\n }\n}\n"},"@openzeppelin/contracts-upgradeable-493/utils/math/SignedMathUpgradeable.sol":{"content":"// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/SignedMath.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Standard signed math utilities missing in the Solidity language.\n */\nlibrary SignedMathUpgradeable {\n /**\n * @dev Returns the largest of two signed numbers.\n */\n function max(int256 a, int256 b) internal pure returns (int256) {\n return a > b ? a : b;\n }\n\n /**\n * @dev Returns the smallest of two signed numbers.\n */\n function min(int256 a, int256 b) internal pure returns (int256) {\n return a < b ? a : b;\n }\n\n /**\n * @dev Returns the average of two signed numbers without overflow.\n * The result is rounded towards zero.\n */\n function average(int256 a, int256 b) internal pure returns (int256) {\n // Formula from the book \"Hacker's Delight\"\n int256 x = (a & b) + ((a ^ b) >> 1);\n return x + (int256(uint256(x) >> 255) & (a ^ b));\n }\n\n /**\n * @dev Returns the absolute unsigned value of a signed value.\n */\n function abs(int256 n) internal pure returns (uint256) {\n unchecked {\n // must be unchecked in order to support `n = type(int256).min`\n return uint256(n >= 0 ? n : -n);\n }\n }\n}\n"},"contracts/common/BasisPointConstants.sol":{"content":"// SPDX-License-Identifier: MIT\n/* ———————————————————————————————————————————————————————————————————————————————— *\n * _____ ______ ______ __ __ __ __ ______ __ __ *\n * /\\ __-. /\\__ _\\ /\\ == \\ /\\ \\ /\\ \"-.\\ \\ /\\ \\ /\\__ _\\ /\\ \\_\\ \\ *\n * \\ \\ \\/\\ \\ \\/_/\\ \\/ \\ \\ __< \\ \\ \\ \\ \\ \\-. \\ \\ \\ \\ \\/_/\\ \\/ \\ \\____ \\ *\n * \\ \\____- \\ \\_\\ \\ \\_\\ \\_\\ \\ \\_\\ \\ \\_\\\\\"\\_\\ \\ \\_\\ \\ \\_\\ \\/\\_____\\ *\n * \\/____/ \\/_/ \\/_/ /_/ \\/_/ \\/_/ \\/_/ \\/_/ \\/_/ \\/_____/ *\n * *\n * ————————————————————————————————— dtrinity.org ————————————————————————————————— *\n * *\n * ▲ *\n * ▲ ▲ *\n * *\n * ———————————————————————————————————————————————————————————————————————————————— *\n * dTRINITY Protocol: https://github.com/dtrinity *\n * ———————————————————————————————————————————————————————————————————————————————— */\n\npragma solidity ^0.8.20;\n\nlibrary BasisPointConstants {\n // Shared definitions of how we represent percentages and basis points\n uint16 public constant ONE_BPS = 100; // 1 basis point with 2 decimals\n uint32 public constant ONE_PERCENT_BPS = ONE_BPS * 100;\n uint32 public constant ONE_HUNDRED_PERCENT_BPS = ONE_PERCENT_BPS * 100;\n}\n"},"contracts/common/SupportsWithdrawalFee.sol":{"content":"// SPDX-License-Identifier: MIT\npragma solidity ^0.8.20;\n\nimport \"./BasisPointConstants.sol\";\nimport {Math} from \"@openzeppelin/contracts-5/utils/math/Math.sol\";\n\nerror InitialFeeExceedsMaxFee(uint256 feeBps, uint256 maxFeeBps);\nerror InvalidFeeBps(uint256 feeBps, uint256 maxFeeBps);\n\n// Note: FeeManagerCannotBeZeroAddress error can be handled by the consuming contract's AccessControl checks.\n\nabstract contract SupportsWithdrawalFee {\n uint256 internal withdrawalFeeBps_;\n\n event WithdrawalFee(\n address indexed owner,\n address indexed receiver,\n uint256 feeAmount\n );\n event WithdrawalFeeSet(uint256 newFeeBps);\n\n /**\n * @notice Must be implemented by the inheriting contract to define its specific maximum withdrawal fee in BPS.\n * @return The maximum withdrawal fee in basis points.\n */\n function _maxWithdrawalFeeBps() internal view virtual returns (uint256);\n\n /**\n * @notice Initialize the withdrawal fee during contract construction/initialization.\n * @param initialFeeBps The initial withdrawal fee in basis points.\n */\n function _initializeWithdrawalFee(uint256 initialFeeBps) internal {\n uint256 maxFee = _maxWithdrawalFeeBps();\n if (initialFeeBps > maxFee) {\n revert InitialFeeExceedsMaxFee(initialFeeBps, maxFee);\n }\n withdrawalFeeBps_ = initialFeeBps;\n emit WithdrawalFeeSet(initialFeeBps);\n }\n\n /**\n * @notice Set the withdrawal fee. Internal function to be called by the inheriting contract.\n * @param newFeeBps The new withdrawal fee in basis points.\n */\n function _setWithdrawalFee(uint256 newFeeBps) internal {\n uint256 maxFee = _maxWithdrawalFeeBps();\n if (newFeeBps > maxFee) {\n revert InvalidFeeBps(newFeeBps, maxFee);\n }\n withdrawalFeeBps_ = newFeeBps;\n emit WithdrawalFeeSet(newFeeBps);\n }\n\n /**\n * @notice Calculate the withdrawal fee for a given asset amount.\n * @dev Uses precise division since fees stay in the vault (no external transfer).\n * @param assetAmount The amount of assets being withdrawn.\n * @return The fee amount in asset terms.\n */\n function _calculateWithdrawalFee(\n uint256 assetAmount\n ) internal view returns (uint256) {\n return\n Math.mulDiv(\n assetAmount,\n withdrawalFeeBps_,\n BasisPointConstants.ONE_HUNDRED_PERCENT_BPS\n );\n }\n\n /**\n * @notice Calculate the net amount after deducting withdrawal fees.\n * Used for previewRedeem to show what the user will actually receive.\n * @param grossAmount The gross amount before fees.\n * @return The net amount after deducting fees.\n */\n function _getNetAmountAfterFee(\n uint256 grossAmount\n ) internal view returns (uint256) {\n uint256 fee = _calculateWithdrawalFee(grossAmount);\n return grossAmount - fee;\n }\n\n /**\n * @notice Calculate the gross amount required to achieve a desired net amount.\n * Used for previewWithdraw to show how many shares are needed for a desired net withdrawal.\n * @dev Uses precise division since fees stay in the vault.\n * @param netAmount The desired net amount after fees.\n * @return The gross amount required before fees.\n */\n function _getGrossAmountRequiredForNet(\n uint256 netAmount\n ) internal view returns (uint256) {\n if (withdrawalFeeBps_ == 0) {\n return netAmount;\n }\n // grossAmount = netAmount / (1 - feeBps/ONE_HUNDRED_PERCENT_BPS)\n // grossAmount = netAmount * ONE_HUNDRED_PERCENT_BPS / (ONE_HUNDRED_PERCENT_BPS - feeBps)\n return\n Math.mulDiv(\n netAmount,\n BasisPointConstants.ONE_HUNDRED_PERCENT_BPS,\n BasisPointConstants.ONE_HUNDRED_PERCENT_BPS - withdrawalFeeBps_\n );\n }\n\n /**\n * @notice Get the current withdrawal fee in basis points.\n * @return The withdrawal fee in basis points.\n */\n function getWithdrawalFeeBps() public view returns (uint256) {\n return withdrawalFeeBps_;\n }\n}\n"},"contracts/vaults/dstake/DStakeToken.sol":{"content":"// SPDX-License-Identifier: MIT\npragma solidity ^0.8.20;\n\nimport \"@openzeppelin/contracts-upgradeable-493/proxy/utils/Initializable.sol\";\nimport {ERC4626Upgradeable} from \"@openzeppelin/contracts-upgradeable-493/token/ERC20/extensions/ERC4626Upgradeable.sol\";\nimport {ERC20Upgradeable} from \"@openzeppelin/contracts-upgradeable-493/token/ERC20/ERC20Upgradeable.sol\";\nimport {AccessControlUpgradeable} from \"@openzeppelin/contracts-upgradeable-493/access/AccessControlUpgradeable.sol\";\nimport {IERC20} from \"@openzeppelin/contracts-5/token/ERC20/IERC20.sol\";\nimport {IERC20Metadata} from \"@openzeppelin/contracts-5/token/ERC20/extensions/IERC20Metadata.sol\";\nimport {IERC20Upgradeable} from \"@openzeppelin/contracts-upgradeable-493/token/ERC20/IERC20Upgradeable.sol\";\nimport {IDStakeCollateralVault} from \"./interfaces/IDStakeCollateralVault.sol\";\nimport {IDStakeRouter} from \"./interfaces/IDStakeRouter.sol\";\nimport {BasisPointConstants} from \"../../common/BasisPointConstants.sol\";\nimport {SupportsWithdrawalFee} from \"../../common/SupportsWithdrawalFee.sol\";\n\n/**\n * @title DStakeToken\n * @dev ERC4626-compliant token representing shares in the DStakeCollateralVault.\n */\ncontract DStakeToken is\n Initializable,\n ERC4626Upgradeable,\n AccessControlUpgradeable,\n SupportsWithdrawalFee\n{\n // --- Roles ---\n bytes32 public constant FEE_MANAGER_ROLE = keccak256(\"FEE_MANAGER_ROLE\");\n\n // --- Errors ---\n error ZeroAddress();\n error ZeroShares();\n error ERC4626ExceedsMaxWithdraw(uint256 assets, uint256 maxAssets);\n error ERC4626ExceedsMaxRedeem(uint256 shares, uint256 maxShares);\n\n // --- State ---\n IDStakeCollateralVault public collateralVault;\n IDStakeRouter public router;\n\n uint256 public constant MAX_WITHDRAWAL_FEE_BPS =\n BasisPointConstants.ONE_PERCENT_BPS;\n\n // --- Initializer ---\n /// @custom:oz-upgrades-unsafe-allow constructor\n constructor() {\n _disableInitializers();\n }\n\n function initialize(\n IERC20Upgradeable _dStable,\n string memory _name,\n string memory _symbol,\n address _initialAdmin,\n address _initialFeeManager\n ) public initializer {\n __ERC20_init(_name, _symbol);\n __ERC4626_init(_dStable);\n __AccessControl_init();\n _initializeWithdrawalFee(0);\n\n if (\n address(_dStable) == address(0) ||\n _initialAdmin == address(0) ||\n _initialFeeManager == address(0)\n ) {\n revert ZeroAddress();\n }\n\n _grantRole(DEFAULT_ADMIN_ROLE, _initialAdmin);\n _grantRole(FEE_MANAGER_ROLE, _initialFeeManager);\n }\n\n // --- SupportsWithdrawalFee Implementation ---\n function _maxWithdrawalFeeBps()\n internal\n view\n virtual\n override\n returns (uint256)\n {\n return MAX_WITHDRAWAL_FEE_BPS;\n }\n\n /**\n * @notice Public getter for the current withdrawal fee in basis points.\n */\n function withdrawalFeeBps() public view returns (uint256) {\n return getWithdrawalFeeBps(); // Uses getter from SupportsWithdrawalFee\n }\n\n /**\n * @notice Public getter for the maximum withdrawal fee in basis points.\n */\n function maxWithdrawalFeeBps() public view returns (uint256) {\n return MAX_WITHDRAWAL_FEE_BPS;\n }\n\n /**\n * @notice Override decimals to match the underlying dSTABLE asset decimals (6 on Fraxtal, 18 on other networks).\n * @dev On Fraxtal, dUSD uses 6 decimals, so dSTAKE shares pass through the same decimal configuration.\n */\n function decimals() public view virtual override returns (uint8) {\n return IERC20Metadata(asset()).decimals();\n }\n\n // --- ERC4626 Overrides ---\n\n /**\n * @inheritdoc ERC4626Upgradeable\n * @dev\n * IMPORTANT: When all vault shares have been redeemed, the router intentionally\n * leaves up to `dustTolerance` (1 wei by default) of wrapper tokens in the\n * `DStakeCollateralVault`. These wrapper tokens continue to accrue\n * yield via an ever-increasing price-per-share. As a result, it is\n * theoretically possible for `totalSupply() == 0` while `totalAssets()`\n * returns a non-zero value.\n *\n * The protocol explicitly accepts that the **first depositor after such a\n * complete withdrawal will receive whatever residual value has\n * accumulated**. Given the minuscule starting balance (≤ 1 wei) and slow\n * growth rate, the team judged that the gas cost of enforcing a strict\n * invariant outweighed the negligible windfall.\n *\n * Please keep this in mind if `dustTolerance` is increased to a non-negligible value.\n */\n function totalAssets() public view virtual override returns (uint256) {\n if (address(collateralVault) == address(0)) {\n return 0;\n }\n return collateralVault.totalValueInDStable();\n }\n\n /**\n * @dev Pulls dSTABLE asset from depositor, then delegates the core deposit logic\n * (converting dSTABLE to vault assets) to the router.\n */\n function _deposit(\n address caller,\n address receiver,\n uint256 assets,\n uint256 shares\n ) internal virtual override {\n // Revert early if the calculated share amount is zero to prevent depositing assets without receiving shares\n if (shares == 0) {\n revert ZeroShares();\n }\n if (\n address(router) == address(0) ||\n address(collateralVault) == address(0)\n ) {\n revert ZeroAddress(); // Router or Vault not set\n }\n\n // Pull assets from caller\n super._deposit(caller, receiver, assets, shares); // This handles the ERC20 transfer\n\n // Approve router to spend the received assets (necessary because super._deposit transfers to this contract)\n // Use standard approve for trusted protocol token (dStable) and trusted protocol contract (router)\n IERC20(asset()).approve(address(router), assets);\n\n // Delegate conversion and vault update logic to router\n router.deposit(assets);\n }\n\n /**\n * @dev Override to handle withdrawals with fees correctly.\n * The `assets` parameter is the net amount of assets the user wants to receive.\n */\n function withdraw(\n uint256 assets,\n address receiver,\n address owner\n ) public virtual override returns (uint256 shares) {\n // Calculate the gross amount needed to achieve the desired net assets after fees\n uint256 grossAssets = _getGrossAmountRequiredForNet(assets);\n\n // Calculate how many shares correspond to the gross asset amount\n shares = super.previewWithdraw(grossAssets);\n\n // Ensure the owner has enough shares to cover the withdrawal (checks in share terms rather than assets).\n if (shares > maxRedeem(owner)) {\n revert ERC4626ExceedsMaxRedeem(shares, maxRedeem(owner));\n }\n\n _withdraw(_msgSender(), receiver, owner, grossAssets, shares);\n return shares;\n }\n\n /**\n * @notice Returns the maximum NET assets that `owner` can withdraw taking the current\n * withdrawal fee into account.\n *\n * OpenZeppelin's reference implementation returns the owner's share balance\n * converted to assets (i.e. a gross value). In a fee-charging vault that\n * exposes `withdraw(netAssets)`, the intuitive expectation is that\n * `maxWithdraw` already reflects what the user will actually receive after\n * fees. We therefore convert the share balance to GROSS assets first and then\n * subtract the fee.\n */\n function maxWithdraw(\n address owner\n ) public view virtual override returns (uint256) {\n uint256 grossAssets = convertToAssets(balanceOf(owner));\n return _getNetAmountAfterFee(grossAssets);\n }\n\n /**\n * @dev Override to ensure the withdrawal fee is deducted only once.\n * The `shares` parameter is converted to its equivalent gross asset value, then the\n * internal _withdraw handles fee calculation. The returned value is the net assets\n * actually received by the `receiver`, matching previewRedeem().\n */\n function redeem(\n uint256 shares,\n address receiver,\n address owner\n ) public virtual override returns (uint256 assets) {\n uint256 grossAssets = convertToAssets(shares); // shares → gross assets before fee\n\n if (shares > maxRedeem(owner)) {\n revert ERC4626ExceedsMaxRedeem(shares, maxRedeem(owner));\n }\n\n // Perform withdrawal using gross assets so that _withdraw computes the correct fee once\n _withdraw(_msgSender(), receiver, owner, grossAssets, shares);\n\n // Net assets the user effectively receives\n assets = _getNetAmountAfterFee(grossAssets);\n return assets;\n }\n\n /**\n * @dev Calculates withdrawal fee, then delegates the core withdrawal logic\n * (converting vault assets back to dSTABLE) to the router.\n * The `assets` parameter is now the gross amount that needs to be withdrawn from the vault.\n */\n function _withdraw(\n address caller,\n address receiver,\n address owner,\n uint256 assets, // This is now the GROSS amount\n uint256 shares\n ) internal virtual override {\n if (caller != owner) {\n _spendAllowance(owner, caller, shares);\n }\n\n if (\n address(router) == address(0) ||\n address(collateralVault) == address(0)\n ) {\n revert ZeroAddress(); // Router or Vault not set\n }\n\n uint256 fee = _calculateWithdrawalFee(assets); // Calculate fee on GROSS amount\n uint256 amountToSend = assets - fee; // Send NET amount to user\n\n // Burn shares from owner\n _burn(owner, shares);\n\n // Delegate conversion and vault update logic to router\n // Router is responsible for ensuring `amountToSend` of dSTABLE reaches the `receiver`.\n router.withdraw(amountToSend, receiver, owner);\n\n // Emit ERC4626 Withdraw event with the NET assets that were actually sent\n emit Withdraw(caller, receiver, owner, amountToSend, shares);\n\n // Optional: Emit fee event\n if (fee > 0) {\n emit WithdrawalFee(owner, receiver, fee);\n }\n }\n\n /**\n * @dev Preview withdraw including withdrawal fee.\n * @param assets The net amount of assets the user wants to receive\n * @return shares The number of shares that need to be burned\n */\n function previewWithdraw(\n uint256 assets\n ) public view virtual override returns (uint256) {\n uint256 grossAssetsRequired = _getGrossAmountRequiredForNet(assets);\n return super.previewWithdraw(grossAssetsRequired);\n }\n\n /**\n * @dev Preview redeem including withdrawal fee.\n */\n function previewRedeem(\n uint256 shares\n ) public view virtual override returns (uint256) {\n uint256 grossAssets = super.previewRedeem(shares);\n return _getNetAmountAfterFee(grossAssets);\n }\n\n // --- Governance Functions ---\n\n /**\n * @notice Sets the address of the DStakeRouter contract.\n * @dev Only callable by DEFAULT_ADMIN_ROLE.\n * @param _router The address of the new router contract.\n */\n function setRouter(address _router) external onlyRole(DEFAULT_ADMIN_ROLE) {\n if (_router == address(0)) {\n revert ZeroAddress();\n }\n router = IDStakeRouter(_router);\n emit RouterSet(_router);\n }\n\n /**\n * @notice Sets the address of the DStakeCollateralVault contract.\n * @dev Only callable by DEFAULT_ADMIN_ROLE.\n * @param _collateralVault The address of the new collateral vault contract.\n */\n function setCollateralVault(\n address _collateralVault\n ) external onlyRole(DEFAULT_ADMIN_ROLE) {\n if (_collateralVault == address(0)) {\n revert ZeroAddress();\n }\n collateralVault = IDStakeCollateralVault(_collateralVault);\n emit CollateralVaultSet(_collateralVault);\n }\n\n /**\n * @notice Sets the withdrawal fee in basis points.\n * @dev Requires FEE_MANAGER_ROLE.\n * @param _feeBps The new withdrawal fee (e.g., 1000 = 0.1%).\n */\n function setWithdrawalFee(\n uint256 _feeBps\n ) external onlyRole(FEE_MANAGER_ROLE) {\n _setWithdrawalFee(_feeBps);\n }\n\n // --- Events ---\n event RouterSet(address indexed router);\n event CollateralVaultSet(address indexed collateralVault);\n}\n"},"contracts/vaults/dstake/interfaces/IDStakeCollateralVault.sol":{"content":"// SPDX-License-Identifier: MIT\npragma solidity ^0.8.20;\n\n/**\n * @title IDStakeCollateralVault Interface\n * @notice Defines the external functions of the DStakeCollateralVault required by other\n * contracts in the dSTAKE system, primarily the DStakeToken.\n */\ninterface IDStakeCollateralVault {\n /**\n * @notice Calculates the total value of all managed `vault assets` held by the vault,\n * denominated in the underlying dStable asset.\n * @dev This is typically called by the DStakeToken's `totalAssets()` function.\n * @return dStableValue The total value of managed assets in terms of the dStable asset.\n */\n function totalValueInDStable() external view returns (uint256 dStableValue);\n\n /**\n * @notice Returns the address of the underlying dStable asset the vault operates with.\n * @return The address of the dStable asset.\n */\n function dStable() external view returns (address);\n\n /**\n * @notice The DStakeToken contract address this vault serves.\n */\n function dStakeToken() external view returns (address);\n\n /**\n * @notice The DStakeRouter contract address allowed to interact.\n */\n function router() external view returns (address);\n\n /**\n * @notice Returns the vault asset at `index` from the internal supported list.\n */\n function supportedAssets(uint256 index) external view returns (address);\n\n /**\n * @notice Returns the entire list of supported vault assets. Convenient for UIs & off-chain analytics.\n */\n function getSupportedAssets() external view returns (address[] memory);\n\n /**\n * @notice Transfers `amount` of `vaultAsset` from this vault to the `recipient`.\n * @dev Only callable by the registered router.\n * @param vaultAsset The address of the vault asset to send.\n * @param amount The amount to send.\n * @param recipient The address to receive the asset.\n */\n function sendAsset(\n address vaultAsset,\n uint256 amount,\n address recipient\n ) external;\n\n /**\n * @notice Sets the address of the DStakeRouter contract.\n * @dev Only callable by an address with the DEFAULT_ADMIN_ROLE.\n * @param _newRouter The address of the new router contract.\n */\n function setRouter(address _newRouter) external;\n\n /**\n * @notice Adds a vault asset to the supported list. Callable only by the router.\n */\n function addSupportedAsset(address vaultAsset) external;\n\n /**\n * @notice Removes a vault asset from the supported list. Callable only by the router.\n */\n function removeSupportedAsset(address vaultAsset) external;\n\n /**\n * @notice Emitted when the router address is set.\n * @param router The address of the new router.\n */\n event RouterSet(address indexed router);\n\n /**\n * @notice Emitted when a new vault asset is added to the supported list.\n */\n event SupportedAssetAdded(address indexed vaultAsset);\n\n /**\n * @notice Emitted when a vault asset is removed from the supported list.\n */\n event SupportedAssetRemoved(address indexed vaultAsset);\n}\n"},"contracts/vaults/dstake/interfaces/IDStakeRouter.sol":{"content":"// SPDX-License-Identifier: MIT\npragma solidity ^0.8.20;\n\n/**\n * @title IDStakeRouter Interface\n * @notice Defines the external functions of the DStakeRouter required by the DStakeToken\n * for handling deposits and withdrawals.\n */\ninterface IDStakeRouter {\n /**\n * @notice Handles the conversion of deposited dStable asset into a chosen `vaultAsset`\n * and informs the collateral vault.\n * @dev Called by `DStakeToken._deposit()` after the token has received the dStable asset.\n * @dev The router MUST pull `dStableAmount` from the caller (`DStakeToken`).\n * @param dStableAmount The amount of dStable asset deposited by the user into the DStakeToken.\n */\n function deposit(uint256 dStableAmount) external;\n\n /**\n * @notice Handles the conversion of a `vaultAsset` back into the dStable asset for withdrawal.\n * @dev Called by `DStakeToken._withdraw()`.\n * @dev The router coordinates pulling the required `vaultAsset` from the collateral vault\n * and ensuring the converted dStable asset is sent to the `receiver`.\n * @param dStableAmount The amount of dStable asset to be withdrawn to the `receiver` (after vault fees).\n * @param receiver The address that will receive the withdrawn dStable asset.\n * @param owner The original owner initiating the withdrawal (typically the user burning shares).\n */\n function withdraw(\n uint256 dStableAmount,\n address receiver,\n address owner\n ) external;\n}\n"}},"matchId":"8593591","creationMatch":"exact_match","runtimeMatch":"exact_match","verifiedAt":"2025-07-31T11:16:00Z","match":"exact_match","chainId":"252","address":"0x0f51B15939A42bD995Ecd3A2C151dC58621856C6"}