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{
"language": "Solidity",
"sources": {
"@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../utils/ContextUpgradeable.sol\";\nimport \"../proxy/utils/Initializable.sol\";\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract OwnableUpgradeable is Initializable, ContextUpgradeable {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n function __Ownable_init() internal onlyInitializing {\n __Ownable_init_unchained();\n }\n\n function __Ownable_init_unchained() internal onlyInitializing {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions anymore. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby removing any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\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/proxy/utils/Initializable.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.8.1) (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 * ```\n * contract MyToken is ERC20Upgradeable {\n * function initialize() initializer public {\n * __ERC20_init(\"MyToken\", \"MTK\");\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/security/ReentrancyGuardUpgradeable.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.8.0) (security/ReentrancyGuard.sol)\n\npragma solidity ^0.8.0;\nimport \"../proxy/utils/Initializable.sol\";\n\n/**\n * @dev Contract module that helps prevent reentrant calls to a function.\n *\n * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier\n * available, which can be applied to functions to make sure there are no nested\n * (reentrant) calls to them.\n *\n * Note that because there is a single `nonReentrant` guard, functions marked as\n * `nonReentrant` may not call one another. This can be worked around by making\n * those functions `private`, and then adding `external` `nonReentrant` entry\n * points to them.\n *\n * TIP: If you would like to learn more about reentrancy and alternative ways\n * to protect against it, check out our blog post\n * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].\n */\nabstract contract ReentrancyGuardUpgradeable is Initializable {\n // Booleans are more expensive than uint256 or any type that takes up a full\n // word because each write operation emits an extra SLOAD to first read the\n // slot's contents, replace the bits taken up by the boolean, and then write\n // back. This is the compiler's defense against contract upgrades and\n // pointer aliasing, and it cannot be disabled.\n\n // The values being non-zero value makes deployment a bit more expensive,\n // but in exchange the refund on every call to nonReentrant will be lower in\n // amount. Since refunds are capped to a percentage of the total\n // transaction's gas, it is best to keep them low in cases like this one, to\n // increase the likelihood of the full refund coming into effect.\n uint256 private constant _NOT_ENTERED = 1;\n uint256 private constant _ENTERED = 2;\n\n uint256 private _status;\n\n function __ReentrancyGuard_init() internal onlyInitializing {\n __ReentrancyGuard_init_unchained();\n }\n\n function __ReentrancyGuard_init_unchained() internal onlyInitializing {\n _status = _NOT_ENTERED;\n }\n\n /**\n * @dev Prevents a contract from calling itself, directly or indirectly.\n * Calling a `nonReentrant` function from another `nonReentrant`\n * function is not supported. It is possible to prevent this from happening\n * by making the `nonReentrant` function external, and making it call a\n * `private` function that does the actual work.\n */\n modifier nonReentrant() {\n _nonReentrantBefore();\n _;\n _nonReentrantAfter();\n }\n\n function _nonReentrantBefore() private {\n // On the first call to nonReentrant, _status will be _NOT_ENTERED\n require(_status != _ENTERED, \"ReentrancyGuard: reentrant call\");\n\n // Any calls to nonReentrant after this point will fail\n _status = _ENTERED;\n }\n\n function _nonReentrantAfter() private {\n // By storing the original value once again, a refund is triggered (see\n // https://eips.ethereum.org/EIPS/eip-2200)\n _status = _NOT_ENTERED;\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/utils/AddressUpgradeable.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.8.0) (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 *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length > 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return 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(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance >= value, \"Address: insufficient balance for call\");\n (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 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/utils/ContextUpgradeable.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\npragma solidity ^0.8.0;\nimport \"../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 /**\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/access/Ownable.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (access/Ownable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../utils/Context.sol\";\n\n/**\n * @dev Contract module which provides a basic access control mechanism, where\n * there is an account (an owner) that can be granted exclusive access to\n * specific functions.\n *\n * By default, the owner account will be the one that deploys the contract. This\n * can later be changed with {transferOwnership}.\n *\n * This module is used through inheritance. It will make available the modifier\n * `onlyOwner`, which can be applied to your functions to restrict their use to\n * the owner.\n */\nabstract contract Ownable is Context {\n address private _owner;\n\n event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);\n\n /**\n * @dev Initializes the contract setting the deployer as the initial owner.\n */\n constructor() {\n _transferOwnership(_msgSender());\n }\n\n /**\n * @dev Throws if called by any account other than the owner.\n */\n modifier onlyOwner() {\n _checkOwner();\n _;\n }\n\n /**\n * @dev Returns the address of the current owner.\n */\n function owner() public view virtual returns (address) {\n return _owner;\n }\n\n /**\n * @dev Throws if the sender is not the owner.\n */\n function _checkOwner() internal view virtual {\n require(owner() == _msgSender(), \"Ownable: caller is not the owner\");\n }\n\n /**\n * @dev Leaves the contract without owner. It will not be possible to call\n * `onlyOwner` functions anymore. Can only be called by the current owner.\n *\n * NOTE: Renouncing ownership will leave the contract without an owner,\n * thereby removing any functionality that is only available to the owner.\n */\n function renounceOwnership() public virtual onlyOwner {\n _transferOwnership(address(0));\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Can only be called by the current owner.\n */\n function transferOwnership(address newOwner) public virtual onlyOwner {\n require(newOwner != address(0), \"Ownable: new owner is the zero address\");\n _transferOwnership(newOwner);\n }\n\n /**\n * @dev Transfers ownership of the contract to a new account (`newOwner`).\n * Internal function without access restriction.\n */\n function _transferOwnership(address newOwner) internal virtual {\n address oldOwner = _owner;\n _owner = newOwner;\n emit OwnershipTransferred(oldOwner, newOwner);\n }\n}\n"
},
"@openzeppelin/contracts/utils/Context.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\nabstract contract Context {\n function _msgSender() internal view virtual returns (address) {\n return msg.sender;\n }\n\n function _msgData() internal view virtual returns (bytes calldata) {\n return msg.data;\n }\n}\n"
},
"contracts/DividendPayingToken.sol": {
"content": "// SPDX-License-Identifier: UNLICENSED\n\npragma solidity ^0.8.0;\n\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\nimport \"./interfaces/DividendPayingTokenInterface.sol\";\nimport \"./interfaces/DividendPayingTokenOptionalInterface.sol\";\nimport \"./interfaces/IERC20.sol\";\nimport \"./library/SafeMath.sol\";\nimport \"./library/SafeMathUint.sol\";\nimport \"./library/SafeMathInt.sol\";\n\ncontract DividendPayingToken is DividendPayingTokenInterface, DividendPayingTokenOptionalInterface, Ownable {\n using SafeMath for uint256;\n using SafeMathUint for uint256;\n using SafeMathInt for int256;\n\n // With `magnitude`, we can properly distribute dividends even if the amount of received ether is small.\n // For more discussion about choosing the value of `magnitude`,\n // see https://github.com/ethereum/EIPs/issues/1726#issuecomment-472352728\n uint256 constant internal magnitude = 2**128;\n\n uint256 internal magnifiedDividendPerShare;\n \n address public token;\n \n // About dividendCorrection:\n // If the token balance of a `_user` is never changed, the dividend of `_user` can be computed with:\n // `dividendOf(_user) = dividendPerShare * balanceOf(_user)`.\n // When `balanceOf(_user)` is changed (via minting/burning/transferring tokens),\n // `dividendOf(_user)` should not be changed,\n // but the computed value of `dividendPerShare * balanceOf(_user)` is changed.\n // To keep the `dividendOf(_user)` unchanged, we add a correction term:\n // `dividendOf(_user) = dividendPerShare * balanceOf(_user) + dividendCorrectionOf(_user)`,\n // where `dividendCorrectionOf(_user)` is updated whenever `balanceOf(_user)` is changed:\n // `dividendCorrectionOf(_user) = dividendPerShare * (old balanceOf(_user)) - (new balanceOf(_user))`.\n // So now `dividendOf(_user)` returns the same value before and after `balanceOf(_user)` is changed.\n mapping(address => int256) internal magnifiedDividendCorrections;\n mapping(address => uint256) internal withdrawnDividends;\n \n mapping (address => uint256) public holderBalance;\n uint256 public totalBalance;\n\n uint256 public totalDividendsDistributed;\n uint256 public totalDividendsWaitingToSend;\n\n /// @dev Distributes dividends whenever ether is paid to this contract.\n receive() external payable {\n distributeDividends();\n }\n\n /// @notice Distributes ether to token holders as dividends.\n /// @dev It reverts if the total supply of tokens is 0.\n /// It emits the `DividendsDistributed` event if the amount of received ether is greater than 0.\n /// About undistributed ether:\n /// In each distribution, there is a small amount of ether not distributed,\n /// the magnified amount of which is\n /// `(msg.value * magnitude) % totalSupply()`.\n /// With a well-chosen `magnitude`, the amount of undistributed ether\n /// (de-magnified) in a distribution can be less than 1 wei.\n /// We can actually keep track of the undistributed ether in a distribution\n /// and try to distribute it in the next distribution,\n /// but keeping track of such data on-chain costs much more than\n /// the saved ether, so we don't do that.\n \n function distributeDividends() public override payable {\n require(false, \"Cannot send BNB directly to tracker as it is unrecoverable\"); // \n }\n \n function distributeTokenDividends() external onlyOwner {\n if(totalBalance > 0){\n uint256 tokensToAdd;\n uint256 balance = IERC20(token).balanceOf(address(this));\n\n if(totalDividendsWaitingToSend < balance){\n tokensToAdd = balance - totalDividendsWaitingToSend;\n } else {\n tokensToAdd = 0;\n }\n\n if (tokensToAdd > 0) {\n magnifiedDividendPerShare = magnifiedDividendPerShare.add(\n (tokensToAdd).mul(magnitude) / totalBalance\n );\n emit DividendsDistributed(msg.sender, tokensToAdd);\n\n totalDividendsDistributed = totalDividendsDistributed.add(tokensToAdd);\n totalDividendsWaitingToSend = totalDividendsWaitingToSend.add(tokensToAdd);\n }\n }\n }\n\n /// @notice Withdraws the ether distributed to the sender.\n /// @dev It emits a `DividendWithdrawn` event if the amount of withdrawn ether is greater than 0.\n function withdrawDividend() external virtual override {\n _withdrawDividendOfUser(payable(msg.sender));\n }\n\n /// @notice Withdraws the ether distributed to the sender.\n /// @dev It emits a `DividendWithdrawn` event if the amount of withdrawn ether is greater than 0.\n function _withdrawDividendOfUser(address payable user) internal returns (uint256) {\n uint256 _withdrawableDividend = withdrawableDividendOf(user);\n if (_withdrawableDividend > 0) {\n withdrawnDividends[user] = withdrawnDividends[user].add(_withdrawableDividend);\n if(totalDividendsWaitingToSend >= _withdrawableDividend){\n totalDividendsWaitingToSend -= _withdrawableDividend;\n }\n else {\n totalDividendsWaitingToSend = 0; \n }\n emit DividendWithdrawn(user, _withdrawableDividend);\n bool success = IERC20(token).transfer(user, _withdrawableDividend);\n\n if(!success) {\n withdrawnDividends[user] = withdrawnDividends[user].sub(_withdrawableDividend);\n return 0;\n }\n\n return _withdrawableDividend;\n }\n return 0;\n }\n\n\n /// @notice View the amount of dividend in wei that an address can withdraw.\n /// @param _owner The address of a token holder.\n /// @return The amount of dividend in wei that `_owner` can withdraw.\n function dividendOf(address _owner) external view override returns(uint256) {\n return withdrawableDividendOf(_owner);\n }\n\n /// @notice View the amount of dividend in wei that an address can withdraw.\n /// @param _owner The address of a token holder.\n /// @return The amount of dividend in wei that `_owner` can withdraw.\n function withdrawableDividendOf(address _owner) public view override returns(uint256) {\n return accumulativeDividendOf(_owner).sub(withdrawnDividends[_owner]);\n }\n\n /// @notice View the amount of dividend in wei that an address has withdrawn.\n /// @param _owner The address of a token holder.\n /// @return The amount of dividend in wei that `_owner` has withdrawn.\n function withdrawnDividendOf(address _owner) external view override returns(uint256) {\n return withdrawnDividends[_owner];\n }\n\n\n /// @notice View the amount of dividend in wei that an address has earned in total.\n /// @dev accumulativeDividendOf(_owner) = withdrawableDividendOf(_owner) + withdrawnDividendOf(_owner)\n /// = (magnifiedDividendPerShare * balanceOf(_owner) + magnifiedDividendCorrections[_owner]) / magnitude\n /// @param _owner The address of a token holder.\n /// @return The amount of dividend in wei that `_owner` has earned in total.\n function accumulativeDividendOf(address _owner) public view override returns(uint256) {\n\n return magnifiedDividendPerShare.mul(holderBalance[_owner]).toInt256Safe()\n .add(magnifiedDividendCorrections[_owner]).toUint256Safe() / magnitude;\n }\n\n /// @dev Internal function that increases tokens to an account.\n /// Update magnifiedDividendCorrections to keep dividends unchanged.\n /// @param account The account that will receive the created tokens.\n /// @param value The amount that will be created.\n function _increase(address account, uint256 value) internal {\n magnifiedDividendCorrections[account] = magnifiedDividendCorrections[account]\n .sub( (magnifiedDividendPerShare.mul(value)).toInt256Safe() );\n }\n\n /// @dev Internal function that reduces an amount of the token of a given account.\n /// Update magnifiedDividendCorrections to keep dividends unchanged.\n /// @param account The account whose tokens will be burnt.\n /// @param value The amount that will be burnt.\n function _reduce(address account, uint256 value) internal {\n magnifiedDividendCorrections[account] = magnifiedDividendCorrections[account]\n .add( (magnifiedDividendPerShare.mul(value)).toInt256Safe() );\n }\n\n function _setBalance(address account, uint256 newBalance) internal {\n uint256 currentBalance = holderBalance[account];\n holderBalance[account] = newBalance;\n if(newBalance > currentBalance) {\n uint256 increaseAmount = newBalance.sub(currentBalance);\n\n _increase(account, increaseAmount);\n totalBalance += increaseAmount;\n } else if(newBalance < currentBalance) {\n uint256 reduceAmount = currentBalance.sub(newBalance);\n _reduce(account, reduceAmount);\n totalBalance -= reduceAmount;\n }\n }\n}"
},
"contracts/DividendTracker.sol": {
"content": "// SPDX-License-Identifier: UNLICENSED\n\npragma solidity ^0.8.0;\n\nimport \"./DividendPayingToken.sol\";\n\ncontract DividendTrackers is DividendPayingToken {\n using SafeMath for uint256;\n using SafeMathInt for int256;\n\n struct Map {\n address[] keys;\n mapping(address => uint) values;\n mapping(address => uint) indexOf;\n mapping(address => bool) inserted;\n }\n\n function get(address key) private view returns (uint) {\n return tokenHoldersMap.values[key];\n }\n\n function getIndexOfKey(address key) private view returns (int) {\n if(!tokenHoldersMap.inserted[key]) {\n return -1;\n }\n return int(tokenHoldersMap.indexOf[key]);\n }\n\n function getKeyAtIndex(uint index) private view returns (address) {\n return tokenHoldersMap.keys[index];\n }\n\n function size() private view returns (uint) {\n return tokenHoldersMap.keys.length;\n }\n\n function set(address key, uint val) private {\n if (tokenHoldersMap.inserted[key]) {\n tokenHoldersMap.values[key] = val;\n } else {\n\n tokenHoldersMap.inserted[key] = true;\n tokenHoldersMap.values[key] = val;\n tokenHoldersMap.indexOf[key] = tokenHoldersMap.keys.length;\n tokenHoldersMap.keys.push(key);\n }\n }\n\n function remove(address key) private {\n if (!tokenHoldersMap.inserted[key]) {\n return;\n }\n\n delete tokenHoldersMap.inserted[key];\n delete tokenHoldersMap.values[key];\n\n uint index = tokenHoldersMap.indexOf[key];\n uint lastIndex = tokenHoldersMap.keys.length - 1;\n address lastKey = tokenHoldersMap.keys[lastIndex];\n\n tokenHoldersMap.indexOf[lastKey] = index;\n delete tokenHoldersMap.indexOf[key];\n\n tokenHoldersMap.keys[index] = lastKey;\n tokenHoldersMap.keys.pop();\n }\n\n Map tokenHoldersMap;\n uint256 public lastProcessedIndex;\n\n mapping (address => bool) public excludedFromDividends;\n mapping (address=> uint256) public amountEarn;\n mapping (address => uint256) public lastClaimTimes;\n\n uint256 public claimWait;\n uint256 public immutable minimumTokenBalanceForDividends;\n\n event ExcludeFromDividends(address indexed account);\n event IncludeInDividends(address indexed account);\n event ClaimWaitUpdated(uint256 indexed newValue, uint256 indexed oldValue);\n event Claim(address indexed account, uint256 amount, bool indexed automatic);\n\n constructor(address _token) {\n \tclaimWait = 1;\n minimumTokenBalanceForDividends = 1;\n token = _token;\n }\n\n function excludeFromDividends(address account) external onlyOwner {\n \texcludedFromDividends[account] = true;\n\n \t_setBalance(account, 0);\n \tremove(account);\n\n \temit ExcludeFromDividends(account);\n }\n \n function includeInDividends(address account) external onlyOwner {\n \trequire(excludedFromDividends[account]);\n \texcludedFromDividends[account] = false;\n\n \temit IncludeInDividends(account);\n }\n\n function updateClaimWait(uint256 newClaimWait) external onlyOwner {\n require(newClaimWait >= 1200 && newClaimWait <= 86400, \"Dividend_Tracker: claimWait must be updated to between 1 and 24 hours\");\n require(newClaimWait != claimWait, \"Dividend_Tracker: Cannot update claimWait to same value\");\n emit ClaimWaitUpdated(newClaimWait, claimWait);\n claimWait = newClaimWait;\n }\n\n function getLastProcessedIndex() external view returns(uint256) {\n \treturn lastProcessedIndex;\n }\n\n function getNumberOfTokenHolders() external view returns(uint256) {\n return tokenHoldersMap.keys.length;\n }\n\n // Check to see if I really made this contract or if it is a clone!\n // @Sir_Tris on TG, @SirTrisCrypto on Twitter\n\n function getAccount(address _account)\n public view returns (\n address account,\n int256 index,\n int256 iterationsUntilProcessed,\n uint256 withdrawableDividends,\n uint256 totalDividends,\n uint256 lastClaimTime,\n uint256 nextClaimTime,\n uint256 secondsUntilAutoClaimAvailable) {\n account = _account;\n\n index = getIndexOfKey(account);\n\n iterationsUntilProcessed = -1;\n\n if(index >= 0) {\n if(uint256(index) > lastProcessedIndex) {\n iterationsUntilProcessed = index.sub(int256(lastProcessedIndex));\n }\n else {\n uint256 processesUntilEndOfArray = tokenHoldersMap.keys.length > lastProcessedIndex ?\n tokenHoldersMap.keys.length.sub(lastProcessedIndex) :\n 0;\n\n\n iterationsUntilProcessed = index.add(int256(processesUntilEndOfArray));\n }\n }\n\n\n withdrawableDividends = withdrawableDividendOf(account);\n totalDividends = accumulativeDividendOf(account);\n\n lastClaimTime = lastClaimTimes[account];\n\n nextClaimTime = lastClaimTime > 0 ?\n lastClaimTime.add(claimWait) :\n 0;\n\n secondsUntilAutoClaimAvailable = nextClaimTime > block.timestamp ?\n nextClaimTime.sub(block.timestamp) :\n 0;\n }\n\n function getAccountAtIndex(uint256 index)\n external view returns (\n address,\n int256,\n int256,\n uint256,\n uint256,\n uint256,\n uint256,\n uint256) {\n \tif(index >= size()) {\n return (0x0000000000000000000000000000000000000000, -1, -1, 0, 0, 0, 0, 0);\n }\n\n address account = getKeyAtIndex(index);\n\n return getAccount(account);\n }\n\n function canAutoClaim(uint256 lastClaimTime) private view returns (bool) {\n \tif(lastClaimTime > block.timestamp) {\n \t\treturn false;\n \t}\n\n \treturn block.timestamp.sub(lastClaimTime) >= claimWait;\n }\n\n function setBalance(address payable account, uint256 newBalance) external onlyOwner {\n \tif(excludedFromDividends[account]) {\n \t\treturn;\n \t}\n \tif(newBalance >= minimumTokenBalanceForDividends) {\n _setBalance(account, newBalance);\n \t\tset(account, newBalance);\n \t}\n \telse {\n\n _setBalance(account, 0);\n \t\tremove(account);\n \t}\n\n \tprocessAccount(account, true);\n }\n \n \n function process(uint256 gas) external returns (uint256, uint256, uint256) {\n \tuint256 numberOfTokenHolders = tokenHoldersMap.keys.length;\n\n \tif(numberOfTokenHolders == 0) {\n \t\treturn (0, 0, lastProcessedIndex);\n \t}\n\n \tuint256 _lastProcessedIndex = lastProcessedIndex;\n\n \tuint256 gasUsed = 0;\n\n \tuint256 gasLeft = gasleft();\n\n \tuint256 iterations = 0;\n \tuint256 claims = 0;\n\n \twhile(gasUsed < gas && iterations < numberOfTokenHolders) {\n \t\t_lastProcessedIndex++;\n\n \t\tif(_lastProcessedIndex >= tokenHoldersMap.keys.length) {\n \t\t\t_lastProcessedIndex = 0;\n \t\t}\n\n \t\taddress account = tokenHoldersMap.keys[_lastProcessedIndex];\n\n \t\tif(canAutoClaim(lastClaimTimes[account])) {\n \t\t\tif(processAccount(payable(account), true)) {\n \t\t\t\tclaims++;\n \t\t\t}\n \t\t}\n\n \t\titerations++;\n\n \t\tuint256 newGasLeft = gasleft();\n\n \t\tif(gasLeft > newGasLeft) {\n \t\t\tgasUsed = gasUsed.add(gasLeft.sub(newGasLeft));\n \t\t}\n \t\tgasLeft = newGasLeft;\n \t}\n\n \tlastProcessedIndex = _lastProcessedIndex;\n \treturn (iterations, claims, lastProcessedIndex);\n }\n\n function processAccount(address payable account, bool automatic) public onlyOwner returns (bool) {\n uint256 amount = _withdrawDividendOfUser(account);\n amountEarn[account] += amount;\n\n \tif(amount > 0) {\n \t\tlastClaimTimes[account] = block.timestamp;\n // claimedAmount[account] = amount;\n emit Claim(account, amount, automatic);\n \t\treturn true;\n \t}\n\n \treturn false;\n }\n}"
},
"contracts/EHXSoloStaking.sol": {
"content": "//SPDX-License-Identifier: MIT\n\npragma solidity ^0.8.0;\n\nimport \"@openzeppelin/contracts-upgradeable/access/OwnableUpgradeable.sol\";\nimport \"@openzeppelin/contracts-upgradeable/security/ReentrancyGuardUpgradeable.sol\";\nimport \"./interfaces/IERC20.sol\";\nimport \"./interfaces/IEHXToken.sol\";\nimport \"./library/SafeMath.sol\";\nimport \"./library/EnumerableSet.sol\";\nimport \"./DividendTracker.sol\";\n\ncontract EHXSoloStaking is OwnableUpgradeable,ReentrancyGuardUpgradeable {\n using SafeMath for uint256;\n\n using EnumerableSet for EnumerableSet.AddressSet;\n\n DividendTrackers public dividendTracker;\n\n IERC20 public USDC;\n\n // Info of each user.\n struct UserInfo {\n uint256 amount; // How many staking tokens the user has provided.\n uint256 rewardDebt; // Reward debt. See explanation below.\n uint256 unstakeUnlock;\n uint256 stakeCollected; //amount of stake collected by the user\n uint256 unstakeAmount;\n uint256 rewardsClaimTime;\n uint256 stakingTime;\n uint256 unstakingTime;\n }\n\n // Info of each pool.\n struct PoolInfo {\n IERC20 lpToken; // Address of staking token contract.\n uint256 allocPoint; // How many allocation points assigned to this pool. Tokens to distribute per block.\n uint256 lastRewardTimestamp; // Last block number that Tokens distribution occurs.\n uint256 accTokensPerShare; // Accumulated Tokens per share, times 1e12. See below.\n }\n\n bool public claimPaused = false;\n\n EnumerableSet.AddressSet private walletsOutstanding;\n mapping(address => uint256) public totalAmount;\n mapping(address => uint256) public claimedAmount;\n mapping(address => uint256) public lastClaim;\n mapping(address => uint256) public totalClaimDuration;\n mapping(address => uint256) public firstClaimPercent;\n mapping(address => bool) public claimedFirst;\n mapping(address => uint256) public rewardsPending;\n mapping(address => uint256) public rewardsClaimed; ////// mapping for storing rewards accumulated by the user\n\n uint256 public totalPendingUnstakedTokens;\n uint256 public unstakeLockDuration = 7 days;\n uint256 public constant MAX_UNSTAKE_DURATION = 21 days;\n \n event AllocatedTokens(address indexed wallet, uint256 amount);\n event ResetAllocation(address indexed wallet);\n event ClaimedTokens(address indexed wallet, uint256 amount);\n event Initialized();\n\n\n IERC20 public stakingToken;\n IERC20 public rewardToken;\n mapping (address => uint256) public holderUnlockTime;\n\n uint256 public totalStaked;\n uint256 public apy;\n uint256 public lockDuration;\n uint256 public exitPenaltyPerc;\n\n // Info of each user that stakes LP tokens.\n mapping (address => UserInfo) public userInfo;\n \n PoolInfo public pool;\n // Total allocation poitns. Must be the sum of all allocation points in all pools.\n uint256 private totalAllocPoint = 0;\n\n event Deposit(address indexed user, uint256 amount);\n event Withdraw(address indexed user, uint256 amount);\n event WithdrawUnstakedTokens(address indexed user, uint256 amount);\n event EmergencyWithdraw(address indexed user, uint256 amount);\n event StakedNFT(address indexed nftAddress, uint256 indexed tokenId, address indexed sender);\n event UnstakedNFT(address indexed nftAddress, uint256 indexed tokenId, address indexed sender);\n\n function initialize(address _stakingToken, uint256 _apy, uint256 _lockDuration, uint256 _exitPenalty) external initializer{\n stakingToken = IERC20(_stakingToken);\n rewardToken = IERC20(_stakingToken);\n address profitSharingToken;\n __Ownable_init();\n if(block.chainid == 1){\n profitSharingToken = 0xdAC17F958D2ee523a2206206994597C13D831ec7; // USDT\n }\n // } else if(block.chainid == 4){\n // profitSharingToken = 0xE7d541c18D6aDb863F4C570065c57b75a53a64d3; // Rinkeby Testnet USDC\n // } else if(block.chainid == 56){\n // profitSharingToken = 0xe9e7CEA3DedcA5984780Bafc599bD69ADd087D56; // BUSD\n // } else if(block.chainid == 97){\n // profitSharingToken = 0xD0Db716Bff27bc4cDc9dD855Ed86f20c4390BEd6; // BSC Testnet BUSD\n // } else {\n // profitSharingToken = 0xe7f1725E7734CE288F8367e1Bb143E90bb3F0512;\n // // revert(\"Chain not configured\");\n // } \n\n USDC = IERC20(address(profitSharingToken));\n\n dividendTracker = new DividendTrackers(profitSharingToken);\n\n apy = _apy;\n lockDuration = _lockDuration;\n exitPenaltyPerc = _exitPenalty;\n pool.lpToken = IERC20(_stakingToken);\n pool.allocPoint = 1000;\n pool.lastRewardTimestamp = block.timestamp;\n pool.accTokensPerShare = 0;\n totalAllocPoint = 1000;\n emit Initialized();\n }\n\n function stopReward() external onlyOwner {\n updatePool();\n apy = 0;\n }\n\n // View function to see pending Reward on frontend.\n function pendingReward(address _user) public view returns (uint256) {\n UserInfo storage user = userInfo[_user];\n if(pool.lastRewardTimestamp == 99999999999){\n return 0;\n }\n uint256 accTokensPerShare = pool.accTokensPerShare;\n uint256 lpSupply = totalStaked;\n if (block.timestamp > pool.lastRewardTimestamp && lpSupply != 0) {\n uint256 tokenReward = calculateNewRewards().mul(pool.allocPoint).div(totalAllocPoint);\n accTokensPerShare = accTokensPerShare.add(tokenReward.mul(1e12).div(lpSupply));\n }\n return user.amount.mul(accTokensPerShare).div(1e12).sub(user.rewardDebt);\n }\n\n // Update reward variables of the given pool to be up-to-date.\n function updatePool() internal {\n // transfer any accumulated tokens.\n if(USDC.balanceOf(address(this)) > 0){\n USDC.transfer(address(dividendTracker), USDC.balanceOf(address(this)));\n dividendTracker.distributeTokenDividends();\n }\n // PoolInfo storage pool = poolInfo[_pid];\n if (block.timestamp <= pool.lastRewardTimestamp) {\n return;\n }\n uint256 lpSupply = totalStaked;\n if (lpSupply == 0) { \n pool.lastRewardTimestamp = block.timestamp;\n return;\n }\n\n uint256 tokenReward = calculateNewRewards().mul(pool.allocPoint).div(totalAllocPoint);\n IEHXToken(address(rewardToken)).mintTokens(address(this), tokenReward);\n pool.accTokensPerShare = pool.accTokensPerShare.add(tokenReward.mul(1e12).div(lpSupply));\n pool.lastRewardTimestamp = block.timestamp;\n }\n\n // Update reward variables for all pools. Be careful of gas spending!\n function massUpdatePools() public onlyOwner {\n updatePool();\n }\n\n // Stake primary tokens = IEHX token\n function deposit(uint256 _amount) public nonReentrant {\n if(holderUnlockTime[msg.sender] == 0){\n holderUnlockTime[msg.sender] = block.timestamp + lockDuration;\n }\n UserInfo storage user = userInfo[msg.sender];\n\n updatePool();\n if (user.amount > 0) {\n uint256 pending = user.amount.mul(pool.accTokensPerShare).div(1e12).sub(user.rewardDebt);\n if(pending > 0) {\n if(pending >= rewardsRemaining()){\n pending = rewardsRemaining();\n }\n rewardsPending[msg.sender] = pending;\n user.rewardsClaimTime= block.timestamp; \n rewardToken.transfer(payable(address(msg.sender)), pending);\n }\n }\n\n uint256 amountTransferred = 0;\n if(_amount > 0) {\n uint256 initialBalance = pool.lpToken.balanceOf(address(this));\n user.stakingTime = block.timestamp; \n pool.lpToken.transferFrom(address(msg.sender), address(this), _amount);\n amountTransferred = pool.lpToken.balanceOf(address(this)) - initialBalance;\n user.amount = user.amount.add(amountTransferred);\n totalStaked += amountTransferred;\n }\n\n dividendTracker.setBalance(payable(msg.sender), user.amount);\n user.rewardDebt = user.amount.mul(pool.accTokensPerShare).div(1e12);\n\n emit Deposit(msg.sender, _amount);\n }\n\n function receivableReferrenceFees(address _user) public view returns(uint256){\n UserInfo storage user = userInfo[_user];\n if(user.amount == 0){\n return 20;\n }\n else if(user.amount>=3000*10**18 && user.amount<16000*10**18){\n return 50;\n }\n else if(user.amount>=16000*10**18 && user.amount<85000*10**18){\n return 70;\n }\n else if(user.amount>=85000*10**18 && user.amount<250000*10**18){\n return 80;\n }\n else{\n return 100;\n }\n }\n \n // Withdraw primary tokens from STAKING.\n\n function withdraw(uint256 _amount) public nonReentrant {\n\n require(holderUnlockTime[msg.sender] <= block.timestamp, \"May not do normal withdraw early\");\n \n UserInfo storage user = userInfo[msg.sender];\n \n require(_amount <= amountWithdrawable(msg.sender) , \"Cannot withdraw vesting tokens.\");\n\n updatePool();\n uint256 pending = user.amount.mul(pool.accTokensPerShare).div(1e12).sub(user.rewardDebt);\n if(pending > 0) {\n if(pending >= rewardsRemaining()){\n pending = rewardsRemaining();\n }\n rewardsClaimed[msg.sender]+=pending; \n rewardsPending[msg.sender]=0; \n user.rewardsClaimTime= block.timestamp; \n rewardToken.transfer(payable(address(msg.sender)), pending);\n }\n\n if(_amount > 0) {\n user.amount -= _amount;\n totalStaked -= _amount;\n user.unstakeUnlock = block.timestamp + unstakeLockDuration;\n user.unstakeAmount += _amount;\n user.stakeCollected += _amount;\n totalPendingUnstakedTokens += _amount;\n // pool.lpToken.transfer(address(msg.sender),_amount);\n }\n\n dividendTracker.setBalance(payable(msg.sender), user.amount);\n user.rewardDebt = user.amount.mul(pool.accTokensPerShare).div(1e12);\n \n if(user.amount > 0){\n holderUnlockTime[msg.sender] = block.timestamp + lockDuration;\n } else {\n holderUnlockTime[msg.sender] = 0;\n }\n emit Withdraw(msg.sender, _amount);\n }\n\n function withdrawUnstakedTokens() external nonReentrant {\n UserInfo storage user = userInfo[msg.sender];\n require(user.unstakeUnlock > 0, \"No tokens to unstake\");\n require(user.unstakeUnlock <= block.timestamp, \"Tokens not unlocked yet\");\n uint256 amountToWithdraw = user.unstakeAmount;\n user.unstakeUnlock = 0;\n user.unstakeAmount = 0;\n totalPendingUnstakedTokens -= amountToWithdraw;\n user.stakeCollected+=amountToWithdraw;\n user.unstakingTime = block.timestamp;\n pool.lpToken.transfer(address(msg.sender), amountToWithdraw);\n\n emit WithdrawUnstakedTokens(msg.sender, amountToWithdraw);\n }\n\n // Withdraw without caring about rewards. EMERGENCY ONLY.\n function emergencyWithdraw() external nonReentrant {\n require(!isWalletVesting(msg.sender), \"Wallet is vesting and cannot emergency withdraw.\");\n \n UserInfo storage user = userInfo[msg.sender];\n uint256 _amount = user.amount;\n totalStaked -= _amount;\n // exit penalty for early unstakers, penalty held on contract as rewards.\n if(holderUnlockTime[msg.sender] >= block.timestamp){\n _amount -= _amount * exitPenaltyPerc / 100;\n }\n holderUnlockTime[msg.sender] = 0;\n user.unstakeUnlock = block.timestamp + unstakeLockDuration;\n user.unstakeAmount += _amount;\n totalPendingUnstakedTokens += _amount;\n user.amount = 0;\n user.rewardDebt = 0;\n dividendTracker.setBalance(payable(msg.sender), 0);\n emit EmergencyWithdraw(msg.sender, _amount);\n }\n\n function getUnstakeUnlockTime(address account) external view returns (uint256 secondsRemaining, uint256 unstakeTimestamp){\n UserInfo memory user = userInfo[account];\n if(user.unstakeUnlock == 0){\n return (0, 0);\n } else if (user.unstakeUnlock <= block.timestamp) {\n return (0, user.unstakeUnlock);\n } else {\n return (user.unstakeUnlock - block.timestamp, user.unstakeUnlock);\n }\n }\n\n // Withdraw reward. EMERGENCY ONLY. This allows the owner to migrate rewards to a new staking pool since we are not minting new tokens.\n function emergencyRewardWithdraw(uint256 _amount) external onlyOwner {\n require(_amount <= rewardsRemaining(), 'not enough tokens to take out');\n UserInfo memory user = userInfo[msg.sender];\n\n rewardsClaimed[msg.sender]+=_amount; \n user.rewardsClaimTime= block.timestamp; \n rewardToken.transfer(address(msg.sender), _amount);\n }\n\n function setUnstakeUnlockDuration(uint256 durationInSeconds) external onlyOwner {\n require(durationInSeconds <= 21 days, \"Too high\");\n unstakeLockDuration = durationInSeconds;\n }\n\n function calculateNewRewards() public view returns (uint256) {\n if(pool.lastRewardTimestamp > block.timestamp){\n return 0;\n }\n return (((block.timestamp - pool.lastRewardTimestamp) * totalStaked) * apy / 100 / 365 days);\n \n }\n\n function rewardsRemaining() public view returns (uint256){\n return rewardToken.balanceOf(address(this)) - totalStaked - totalPendingUnstakedTokens;\n }\n\n function updateApy(uint256 newApy) external onlyOwner {\n require(newApy <= 10000, \"APY must be below 10000%\");\n updatePool();\n apy = newApy;\n }\n\n function updateExitPenalty(uint256 newPenaltyPerc) external onlyOwner {\n require(newPenaltyPerc <= 20, \"May not set higher than 20%\");\n exitPenaltyPerc = newPenaltyPerc;\n }\n\n function claim() external nonReentrant {\n dividendTracker.processAccount(payable(msg.sender), false);\n }\n\n // Vesting information\n\n function vestTokens(\n address[] calldata wallets, \n uint256[] calldata amountsWithDecimals, \n uint256[] calldata totalDurationInSeconds, \n uint256[] calldata timeBeforeFirstClaim, \n uint256[] calldata firstClaimInitialPercent) \n external onlyOwner {\n \n updatePool(); // ensure no larger claims made based on new balances\n require(wallets.length == amountsWithDecimals.length, \"array lengths must match\");\n address wallet;\n uint256 amount;\n uint256 total;\n for(uint256 i = 0; i < wallets.length; i++){\n wallet = wallets[i];\n amount = amountsWithDecimals[i];\n total += amount;\n UserInfo storage user = userInfo[wallet];\n totalAmount[wallet] += amount;\n user.amount += amount;\n totalStaked += amount;\n require(totalDurationInSeconds[i] > 0, \"Total Duration must be > 0\");\n totalClaimDuration[wallet] = totalDurationInSeconds[i];\n firstClaimPercent[wallet] = firstClaimInitialPercent[i];\n if(lastClaim[wallet] == 0){\n lastClaim[wallet] = block.timestamp + timeBeforeFirstClaim[i];\n }\n emit AllocatedTokens(wallet, amount);\n if(!walletsOutstanding.contains(wallet)){\n walletsOutstanding.add(wallet);\n }\n }\n\n IEHXToken(address(stakingToken)).mintTokens(address(this), total);\n }\n\n // for resetting allocation in the event of a mistake\n function resetAllocation(address[] calldata wallets) external onlyOwner {\n for(uint256 i = 0; i < wallets.length; i++){\n totalAmount[wallets[i]] = 0;\n lastClaim[wallets[i]] = 0;\n walletsOutstanding.remove(wallets[i]);\n emit ResetAllocation(wallets[i]);\n }\n }\n\n modifier notPaused {\n require(!claimPaused, \"Claim is paused\");\n _;\n }\n\n function setClaimPaused(bool paused) external onlyOwner {\n claimPaused = paused;\n }\n\n function claimVestedTokens() external notPaused nonReentrant {\n updatePool();\n uint256 amountToClaim = currentClaimableAmount(msg.sender);\n if(!claimedFirst[msg.sender]){\n claimedFirst[msg.sender] = true;\n }\n lastClaim[msg.sender] = block.timestamp;\n claimedAmount[msg.sender] += amountToClaim;\n\n UserInfo storage user = userInfo[msg.sender];\n\n uint256 pending = user.amount.mul(pool.accTokensPerShare).div(1e12).sub(user.rewardDebt);\n if(pending > 0) {\n if(pending >= rewardsRemaining()){\n pending = rewardsRemaining();\n }\n rewardsClaimed[msg.sender]+=pending; \n user.rewardsClaimTime= block.timestamp; \n rewardToken.transfer(payable(address(msg.sender)), pending);\n }\n user.amount -= amountToClaim;\n totalStaked -= amountToClaim;\n require(amountToClaim > 0, \"Cannot claim 0\");\n require(walletsOutstanding.contains(msg.sender), \"Wallet cannot claim\");\n require(stakingToken.balanceOf(address(this)) >= amountToClaim, \"Not enough tokens on contract to claim\");\n stakingToken.transfer(msg.sender, amountToClaim);\n emit ClaimedTokens(msg.sender, amountToClaim);\n if(totalAmount[msg.sender] <= claimedAmount[msg.sender]){\n walletsOutstanding.remove(msg.sender);\n }\n }\n\n function isWalletVesting(address account) public view returns (bool){\n return walletsOutstanding.contains(account);\n }\n\n function currentClaimableAmount(address wallet) public view returns (uint256 amountToClaim){\n if(lastClaim[wallet] > block.timestamp) return 0;\n if(!claimedFirst[wallet]){\n amountToClaim = totalAmount[wallet] * firstClaimPercent[wallet] / 10000;\n }\n uint256 claimPeriods = (block.timestamp - lastClaim[wallet]);\n amountToClaim += claimPeriods * totalAmount[wallet] / (totalClaimDuration[wallet]);\n if(amountToClaim > totalAmount[wallet] - claimedAmount[wallet]){\n amountToClaim = totalAmount[wallet] - claimedAmount[wallet];\n }\n }\n\n function totalVestingRemainder(address wallet) public view returns (uint256){\n return(totalAmount[wallet] - claimedAmount[wallet]);\n }\n\n function amountWithdrawable(address wallet) public view returns (uint256){\n UserInfo storage user = userInfo[wallet];\n return(user.amount - totalVestingRemainder(wallet));\n }\n\n function getTotalDividendsDistributed() external view returns (uint256) {\n return dividendTracker.totalDividendsDistributed();\n }\n\n function withdrawableDividendOf(address account) public view returns(uint256) {\n \treturn dividendTracker.withdrawableDividendOf(account);\n \t}\n\n\tfunction dividendTokenBalanceOf(address account) public view returns (uint256) {\n\t\treturn dividendTracker.holderBalance(account);\n\t}\n\n function getAccountDividendsInfo(address account)\n external view returns (\n address,\n int256,\n int256,\n uint256,\n uint256,\n uint256,\n uint256,\n uint256) {\n return dividendTracker.getAccount(account);\n }\n\n function getNumberOfDividendTokenHolders() external view returns(uint256) {\n return dividendTracker.getNumberOfTokenHolders();\n }\n \n function getNumberOfDividends() external view returns(uint256) {\n return dividendTracker.totalBalance();\n }\n}"
},
"contracts/interfaces/DividendPayingTokenInterface.sol": {
"content": "// SPDX-License-Identifier: UNLICENSED\npragma solidity ^0.8.0;\n\ninterface DividendPayingTokenInterface {\n /// @notice View the amount of dividend in wei that an address can withdraw.\n /// @param _owner The address of a token holder.\n /// @return The amount of dividend in wei that `_owner` can withdraw.\n function dividendOf(address _owner) external view returns(uint256);\n\n /// @notice Distributes ether to token holders as dividends.\n /// @dev SHOULD distribute the paid ether to token holders as dividends.\n /// SHOULD NOT directly transfer ether to token holders in this function.\n /// MUST emit a `DividendsDistributed` event when the amount of distributed ether is greater than 0.\n function distributeDividends() external payable;\n\n /// @notice Withdraws the ether distributed to the sender.\n /// @dev SHOULD transfer `dividendOf(msg.sender)` wei to `msg.sender`, and `dividendOf(msg.sender)` SHOULD be 0 after the transfer.\n /// MUST emit a `DividendWithdrawn` event if the amount of ether transferred is greater than 0.\n function withdrawDividend() external;\n\n /// @dev This event MUST emit when ether is distributed to token holders.\n /// @param from The address which sends ether to this contract.\n /// @param weiAmount The amount of distributed ether in wei.\n event DividendsDistributed(\n address indexed from,\n uint256 weiAmount\n );\n\n /// @dev This event MUST emit when an address withdraws their dividend.\n /// @param to The address which withdraws ether from this contract.\n /// @param weiAmount The amount of withdrawn ether in wei.\n event DividendWithdrawn(\n address indexed to,\n uint256 weiAmount\n );\n}"
},
"contracts/interfaces/DividendPayingTokenOptionalInterface.sol": {
"content": "// SPDX-License-Identifier: UNLICENSED\npragma solidity ^0.8.0;\n\n\ninterface DividendPayingTokenOptionalInterface {\n /// @notice View the amount of dividend in wei that an address can withdraw.\n /// @param _owner The address of a token holder.\n /// @return The amount of dividend in wei that `_owner` can withdraw.\n function withdrawableDividendOf(address _owner) external view returns(uint256);\n\n /// @notice View the amount of dividend in wei that an address has withdrawn.\n /// @param _owner The address of a token holder.\n /// @return The amount of dividend in wei that `_owner` has withdrawn.\n function withdrawnDividendOf(address _owner) external view returns(uint256);\n\n /// @notice View the amount of dividend in wei that an address has earned in total.\n /// @dev accumulativeDividendOf(_owner) = withdrawableDividendOf(_owner) + withdrawnDividendOf(_owner)\n /// @param _owner The address of a token holder.\n /// @return The amount of dividend in wei that `_owner` has earned in total.\n function accumulativeDividendOf(address _owner) external view returns(uint256);\n}"
},
"contracts/interfaces/IEHXToken.sol": {
"content": "// SPDX-License-Identifier: UNLICENSED\npragma solidity ^0.8.0;\n\n\ninterface IEHXToken {\n function mintTokens(address account, uint256 amount) external;\n}"
},
"contracts/interfaces/IERC20.sol": {
"content": "// SPDX-License-Identifier: UNLICENSED\npragma solidity ^0.8.0;\n\ninterface IERC20 {\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 `recipient`.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transfer(address recipient, 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 `sender` to `recipient` using the\n * allowance mechanism. `amount` is then deducted from the caller's\n * allowance.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transferFrom(\n address sender,\n address recipient,\n uint256 amount\n ) external returns (bool);\n\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}"
},
"contracts/library/EnumerableSet.sol": {
"content": "// SPDX-License-Identifier: UNLICENSED\npragma solidity ^0.8.0;\n\nlibrary EnumerableSet {\n\n struct Set {\n bytes32[] _values;\n mapping(bytes32 => uint256) _indexes;\n }\n\n function _add(Set storage set, bytes32 value) private returns (bool) {\n if (!_contains(set, value)) {\n set._values.push(value);\n set._indexes[value] = set._values.length;\n return true;\n } else {\n return false;\n }\n }\n\n function _remove(Set storage set, bytes32 value) private returns (bool) {\n uint256 valueIndex = set._indexes[value];\n\n if (valueIndex != 0) {\n uint256 toDeleteIndex = valueIndex - 1;\n uint256 lastIndex = set._values.length - 1;\n\n if (lastIndex != toDeleteIndex) {\n bytes32 lastValue = set._values[lastIndex];\n set._values[toDeleteIndex] = lastValue;\n set._indexes[lastValue] = valueIndex;\n }\n\n set._values.pop();\n\n delete set._indexes[value];\n\n return true;\n } else {\n return false;\n }\n }\n\n function _contains(Set storage set, bytes32 value) private view returns (bool) {\n return set._indexes[value] != 0;\n }\n\n function _length(Set storage set) private view returns (uint256) {\n return set._values.length;\n }\n\n function _at(Set storage set, uint256 index) private view returns (bytes32) {\n return set._values[index];\n }\n\n function _values(Set storage set) private view returns (bytes32[] memory) {\n return set._values;\n }\n\n\n // AddressSet\n\n struct AddressSet {\n Set _inner;\n }\n\n function add(AddressSet storage set, address value) internal returns (bool) {\n return _add(set._inner, bytes32(uint256(uint160(value))));\n }\n\n function remove(AddressSet storage set, address value) internal returns (bool) {\n return _remove(set._inner, bytes32(uint256(uint160(value))));\n }\n\n /**\n * @dev Returns true if the value is in the set. O(1).\n */\n function contains(AddressSet storage set, address value) internal view returns (bool) {\n return _contains(set._inner, bytes32(uint256(uint160(value))));\n }\n\n /**\n * @dev Returns the number of values in the set. O(1).\n */\n function length(AddressSet storage set) internal view returns (uint256) {\n return _length(set._inner);\n }\n\n function at(AddressSet storage set, uint256 index) internal view returns (address) {\n return address(uint160(uint256(_at(set._inner, index))));\n }\n\n function values(AddressSet storage set) internal view returns (address[] memory) {\n bytes32[] memory store = _values(set._inner);\n address[] memory result;\n\n /// @solidity memory-safe-assembly\n assembly {\n result := store\n }\n\n return result;\n }\n}"
},
"contracts/library/SafeMath.sol": {
"content": "// SPDX-License-Identifier: UNLICENSED\npragma solidity ^0.8.0;\n\nlibrary SafeMath {\n /**\n * @dev Returns the addition of two unsigned integers, reverting on\n * overflow.\n *\n * Counterpart to Solidity's `+` operator.\n *\n * Requirements:\n *\n * - Addition cannot overflow.\n */\n function add(uint256 a, uint256 b) internal pure returns (uint256) {\n uint256 c = a + b;\n require(c >= a, 'SafeMath: addition overflow');\n\n return c;\n }\n\n /**\n * @dev Returns the subtraction of two unsigned integers, reverting on\n * overflow (when the result is negative).\n *\n * Counterpart to Solidity's `-` operator.\n *\n * Requirements:\n *\n * - Subtraction cannot overflow.\n */\n function sub(uint256 a, uint256 b) internal pure returns (uint256) {\n return sub(a, b, 'SafeMath: subtraction overflow');\n }\n\n /**\n * @dev Returns the subtraction of two unsigned integers, reverting with custom message on\n * overflow (when the result is negative).\n *\n * Counterpart to Solidity's `-` operator.\n *\n * Requirements:\n *\n * - Subtraction cannot overflow.\n */\n function sub(\n uint256 a,\n uint256 b,\n string memory errorMessage\n ) internal pure returns (uint256) {\n require(b <= a, errorMessage);\n uint256 c = a - b;\n\n return c;\n }\n\n /**\n * @dev Returns the multiplication of two unsigned integers, reverting on\n * overflow.\n *\n * Counterpart to Solidity's `*` operator.\n *\n * Requirements:\n *\n * - Multiplication cannot overflow.\n */\n function mul(uint256 a, uint256 b) internal pure returns (uint256) {\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) {\n return 0;\n }\n\n uint256 c = a * b;\n require(c / a == b, 'SafeMath: multiplication overflow');\n\n return c;\n }\n\n /**\n * @dev Returns the integer division of two unsigned integers. Reverts on\n * division by zero. The result is rounded towards zero.\n *\n * Counterpart to Solidity's `/` operator. Note: this function uses a\n * `revert` opcode (which leaves remaining gas untouched) while Solidity\n * uses an invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n return div(a, b, 'SafeMath: division by zero');\n }\n\n /**\n * @dev Returns the integer division of two unsigned integers. Reverts with custom message on\n * division by zero. The result is rounded towards zero.\n *\n * Counterpart to Solidity's `/` operator. Note: this function uses a\n * `revert` opcode (which leaves remaining gas untouched) while Solidity\n * uses an invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function div(\n uint256 a,\n uint256 b,\n string memory errorMessage\n ) internal pure returns (uint256) {\n require(b > 0, errorMessage);\n uint256 c = a / b;\n // assert(a == b * c + a % b); // There is no case in which this doesn't hold\n\n return c;\n }\n\n /**\n * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n * Reverts when dividing by zero.\n *\n * Counterpart to Solidity's `%` operator. This function uses a `revert`\n * opcode (which leaves remaining gas untouched) while Solidity uses an\n * invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function mod(uint256 a, uint256 b) internal pure returns (uint256) {\n return mod(a, b, 'SafeMath: modulo by zero');\n }\n\n /**\n * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n * Reverts with custom message when dividing by zero.\n *\n * Counterpart to Solidity's `%` operator. This function uses a `revert`\n * opcode (which leaves remaining gas untouched) while Solidity uses an\n * invalid opcode to revert (consuming all remaining gas).\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function mod(\n uint256 a,\n uint256 b,\n string memory errorMessage\n ) internal pure returns (uint256) {\n require(b != 0, errorMessage);\n return a % b;\n }\n\n function min(uint256 x, uint256 y) internal pure returns (uint256 z) {\n z = x < y ? x : y;\n }\n\n // babylonian method (https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method)\n function sqrt(uint256 y) internal pure returns (uint256 z) {\n if (y > 3) {\n z = y;\n uint256 x = y / 2 + 1;\n while (x < z) {\n z = x;\n x = (y / x + x) / 2;\n }\n } else if (y != 0) {\n z = 1;\n }\n }\n}"
},
"contracts/library/SafeMathInt.sol": {
"content": "// SPDX-License-Identifier: UNLICENSED\npragma solidity ^0.8.0;\n\nlibrary SafeMathInt {\n int256 private constant MIN_INT256 = int256(1) << 255;\n int256 private constant MAX_INT256 = ~(int256(1) << 255);\n\n /**\n * @dev Multiplies two int256 variables and fails on overflow.\n */\n function mul(int256 a, int256 b) internal pure returns (int256) {\n int256 c = a * b;\n\n // Detect overflow when multiplying MIN_INT256 with -1\n require(c != MIN_INT256 || (a & MIN_INT256) != (b & MIN_INT256));\n require((b == 0) || (c / b == a));\n return c;\n }\n\n /**\n * @dev Division of two int256 variables and fails on overflow.\n */\n function div(int256 a, int256 b) internal pure returns (int256) {\n // Prevent overflow when dividing MIN_INT256 by -1\n require(b != -1 || a != MIN_INT256);\n\n // Solidity already throws when dividing by 0.\n return a / b;\n }\n\n /**\n * @dev Subtracts two int256 variables and fails on overflow.\n */\n function sub(int256 a, int256 b) internal pure returns (int256) {\n int256 c = a - b;\n require((b >= 0 && c <= a) || (b < 0 && c > a));\n return c;\n }\n\n /**\n * @dev Adds two int256 variables and fails on overflow.\n */\n function add(int256 a, int256 b) internal pure returns (int256) {\n int256 c = a + b;\n require((b >= 0 && c >= a) || (b < 0 && c < a));\n return c;\n }\n\n /**\n * @dev Converts to absolute value, and fails on overflow.\n */\n function abs(int256 a) internal pure returns (int256) {\n require(a != MIN_INT256);\n return a < 0 ? -a : a;\n }\n\n\n function toUint256Safe(int256 a) internal pure returns (uint256) {\n require(a >= 0);\n return uint256(a);\n }\n}\n"
},
"contracts/library/SafeMathUint.sol": {
"content": "// SPDX-License-Identifier: UNLICENSED\npragma solidity ^0.8.0;\n\nlibrary SafeMathUint {\n function toInt256Safe(uint256 a) internal pure returns (int256) {\n int256 b = int256(a);\n require(b >= 0);\n return b;\n }\n}"
}
},
"settings": {
"optimizer": {
"enabled": true,
"runs": 200
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"devdoc",
"userdoc",
"metadata",
"abi"
]
}
},
"libraries": {}
}
} |