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{
"language": "Solidity",
"sources": {
"contracts/Airdrop.sol": {
"content": "pragma solidity ^0.8.0;\n\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\nimport \"@openzeppelin/contracts/utils/Address.sol\";\nimport \"@openzeppelin/contracts/utils/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"./helpers/TransferHelper.sol\";\n\ncontract Airdrop is Ownable {\n using Address for address;\n using SafeMath for uint256;\n\n struct AirdropItem {\n address to;\n uint256 amount;\n }\n\n uint256 public fee;\n\n constructor(uint256 _fee) {\n fee = _fee;\n }\n\n function setFee(uint256 _fee) external onlyOwner {\n fee = _fee;\n }\n\n function drop(address token, AirdropItem[] memory airdropItems) external payable {\n require(token.isContract(), \"must_be_contract_address\");\n require(msg.value >= fee, \"fee\");\n\n uint256 totalSent;\n\n for (uint256 i = 0; i < airdropItems.length; i++) totalSent = totalSent.add(airdropItems[i].amount);\n\n require(IERC20(token).allowance(_msgSender(), address(this)) >= totalSent, \"not_enough_allowance\");\n\n for (uint256 i = 0; i < airdropItems.length; i++) {\n TransferHelpers._safeTransferFromERC20(token, _msgSender(), airdropItems[i].to, airdropItems[i].amount);\n }\n }\n\n function retrieveEther(address to) external onlyOwner {\n TransferHelpers._safeTransferEther(to, address(this).balance);\n }\n\n function retrieveERC20(\n address token,\n address to,\n uint256 amount\n ) external onlyOwner {\n TransferHelpers._safeTransferERC20(token, to, amount);\n }\n\n receive() external payable {}\n}\n"
},
"contracts/helpers/TransferHelper.sol": {
"content": "pragma solidity ^0.8.0;\n\nimport \"@openzeppelin/contracts/utils/Address.sol\";\n\nlibrary TransferHelpers {\n using Address for address;\n\n function _safeTransferEther(address to, uint256 amount) internal returns (bool success) {\n (success, ) = to.call{value: amount}(new bytes(0));\n require(success, \"failed to transfer ether\");\n }\n\n function _safeTransferERC20(\n address token,\n address to,\n uint256 amount\n ) internal returns (bool success) {\n require(token.isContract(), \"call_to_non_contract\");\n (success, ) = token.call(abi.encodeWithSelector(bytes4(keccak256(bytes(\"transfer(address,uint256)\"))), to, amount));\n require(success, \"low_level_contract_call_failed\");\n }\n\n function _safeTransferFromERC20(\n address token,\n address spender,\n address recipient,\n uint256 amount\n ) internal returns (bool success) {\n require(token.isContract(), \"call_to_non_contract\");\n (success, ) = token.call(abi.encodeWithSelector(bytes4(keccak256(bytes(\"transferFrom(address,address,uint256)\"))), spender, recipient, amount));\n require(success, \"low_level_contract_call_failed\");\n }\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/Address.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (utils/Address.sol)\n\npragma solidity ^0.8.1;\n\n/**\n * @dev Collection of functions related to the address type\n */\nlibrary Address {\n /**\n * @dev Returns true if `account` is a contract.\n *\n * [IMPORTANT]\n * ====\n * It is unsafe to assume that an address for which this function returns\n * false is an externally-owned account (EOA) and not a contract.\n *\n * Among others, `isContract` will return false for the following\n * types of addresses:\n *\n * - an externally-owned account\n * - a contract in construction\n * - an address where a contract will be created\n * - an address where a contract lived, but was destroyed\n * ====\n *\n * [IMPORTANT]\n * ====\n * You shouldn't rely on `isContract` to protect against flash loan attacks!\n *\n * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets\n * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract\n * constructor.\n * ====\n */\n function isContract(address account) internal view returns (bool) {\n // This method relies on extcodesize/address.code.length, which returns 0\n // for contracts in construction, since the code is only stored at the end\n // of the constructor execution.\n\n return account.code.length > 0;\n }\n\n /**\n * @dev Replacement for Solidity's `transfer`: sends `amount` wei to\n * `recipient`, forwarding all available gas and reverting on errors.\n *\n * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost\n * of certain opcodes, possibly making contracts go over the 2300 gas limit\n * imposed by `transfer`, making them unable to receive funds via\n * `transfer`. {sendValue} removes this limitation.\n *\n * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].\n *\n * IMPORTANT: because control is transferred to `recipient`, care must be\n * taken to not create reentrancy vulnerabilities. Consider using\n * {ReentrancyGuard} or the\n * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].\n */\n function sendValue(address payable recipient, uint256 amount) internal {\n require(address(this).balance >= amount, \"Address: insufficient balance\");\n\n (bool success, ) = recipient.call{value: amount}(\"\");\n require(success, \"Address: unable to send value, recipient may have reverted\");\n }\n\n /**\n * @dev Performs a Solidity function call using a low level `call`. A\n * plain `call` is an unsafe replacement for a function call: use this\n * function instead.\n *\n * If `target` reverts with a revert reason, it is bubbled up by this\n * function (like regular Solidity function calls).\n *\n * Returns the raw returned data. To convert to the expected return value,\n * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].\n *\n * Requirements:\n *\n * - `target` must be a contract.\n * - calling `target` with `data` must not revert.\n *\n * _Available since v3.1._\n */\n function functionCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionCall(target, data, \"Address: low-level call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with\n * `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, 0, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but also transferring `value` wei to `target`.\n *\n * Requirements:\n *\n * - the calling contract must have an ETH balance of at least `value`.\n * - the called Solidity function must be `payable`.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value\n ) internal returns (bytes memory) {\n return functionCallWithValue(target, data, value, \"Address: low-level call with value failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but\n * with `errorMessage` as a fallback revert reason when `target` reverts.\n *\n * _Available since v3.1._\n */\n function functionCallWithValue(\n address target,\n bytes memory data,\n uint256 value,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(address(this).balance >= value, \"Address: insufficient balance for call\");\n require(isContract(target), \"Address: call to non-contract\");\n\n (bool success, bytes memory returndata) = target.call{value: value}(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {\n return functionStaticCall(target, data, \"Address: low-level static call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a static call.\n *\n * _Available since v3.3._\n */\n function functionStaticCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal view returns (bytes memory) {\n require(isContract(target), \"Address: static call to non-contract\");\n\n (bool success, bytes memory returndata) = target.staticcall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {\n return functionDelegateCall(target, data, \"Address: low-level delegate call failed\");\n }\n\n /**\n * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],\n * but performing a delegate call.\n *\n * _Available since v3.4._\n */\n function functionDelegateCall(\n address target,\n bytes memory data,\n string memory errorMessage\n ) internal returns (bytes memory) {\n require(isContract(target), \"Address: delegate call to non-contract\");\n\n (bool success, bytes memory returndata) = target.delegatecall(data);\n return verifyCallResult(success, returndata, errorMessage);\n }\n\n /**\n * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the\n * revert reason using the provided one.\n *\n * _Available since v4.3._\n */\n function verifyCallResult(\n bool success,\n bytes memory returndata,\n string memory errorMessage\n ) internal pure returns (bytes memory) {\n if (success) {\n return returndata;\n } else {\n // Look for revert reason and bubble it up if present\n if (returndata.length > 0) {\n // The easiest way to bubble the revert reason is using memory via assembly\n /// @solidity memory-safe-assembly\n assembly {\n let returndata_size := mload(returndata)\n revert(add(32, returndata), returndata_size)\n }\n } else {\n revert(errorMessage);\n }\n }\n }\n}\n"
},
"@openzeppelin/contracts/utils/math/SafeMath.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (utils/math/SafeMath.sol)\n\npragma solidity ^0.8.0;\n\n// CAUTION\n// This version of SafeMath should only be used with Solidity 0.8 or later,\n// because it relies on the compiler's built in overflow checks.\n\n/**\n * @dev Wrappers over Solidity's arithmetic operations.\n *\n * NOTE: `SafeMath` is generally not needed starting with Solidity 0.8, since the compiler\n * now has built in overflow checking.\n */\nlibrary SafeMath {\n /**\n * @dev Returns the addition of two unsigned integers, with an overflow flag.\n *\n * _Available since v3.4._\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 * _Available since v3.4._\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 * _Available since v3.4._\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 * _Available since v3.4._\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 * _Available since v3.4._\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 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 return a + b;\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 a - b;\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 return a * b;\n }\n\n /**\n * @dev Returns the integer division of two unsigned integers, reverting on\n * division by zero. The result is rounded towards zero.\n *\n * Counterpart to Solidity's `/` operator.\n *\n * Requirements:\n *\n * - The divisor cannot be zero.\n */\n function div(uint256 a, uint256 b) internal pure returns (uint256) {\n return a / b;\n }\n\n /**\n * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n * reverting 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 a % b;\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 * CAUTION: This function is deprecated because it requires allocating memory for the error\n * message unnecessarily. For custom revert reasons use {trySub}.\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 unchecked {\n require(b <= a, errorMessage);\n return a - b;\n }\n }\n\n /**\n * @dev Returns the integer division of two unsigned integers, reverting 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 unchecked {\n require(b > 0, errorMessage);\n return a / b;\n }\n }\n\n /**\n * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),\n * reverting with custom message when dividing by zero.\n *\n * CAUTION: This function is deprecated because it requires allocating memory for the error\n * message unnecessarily. For custom revert reasons use {tryMod}.\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 unchecked {\n require(b > 0, errorMessage);\n return a % b;\n }\n }\n}\n"
},
"@openzeppelin/contracts/token/ERC20/IERC20.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC20 standard as defined in the EIP.\n */\ninterface IERC20 {\n /**\n * @dev Emitted when `value` tokens are moved from one account (`from`) to\n * another (`to`).\n *\n * Note that `value` may be zero.\n */\n event Transfer(address indexed from, address indexed to, uint256 value);\n\n /**\n * @dev Emitted when the allowance of a `spender` for an `owner` is set by\n * a call to {approve}. `value` is the new allowance.\n */\n event Approval(address indexed owner, address indexed spender, uint256 value);\n\n /**\n * @dev Returns the amount of tokens in existence.\n */\n function totalSupply() external view returns (uint256);\n\n /**\n * @dev Returns the amount of tokens owned by `account`.\n */\n function balanceOf(address account) external view returns (uint256);\n\n /**\n * @dev Moves `amount` tokens from the caller's account to `to`.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transfer(address to, uint256 amount) external returns (bool);\n\n /**\n * @dev Returns the remaining number of tokens that `spender` will be\n * allowed to spend on behalf of `owner` through {transferFrom}. This is\n * zero by default.\n *\n * This value changes when {approve} or {transferFrom} are called.\n */\n function allowance(address owner, address spender) external view returns (uint256);\n\n /**\n * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * IMPORTANT: Beware that changing an allowance with this method brings the risk\n * that someone may use both the old and the new allowance by unfortunate\n * transaction ordering. One possible solution to mitigate this race\n * condition is to first reduce the spender's allowance to 0 and set the\n * desired value afterwards:\n * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729\n *\n * Emits an {Approval} event.\n */\n function approve(address spender, uint256 amount) external returns (bool);\n\n /**\n * @dev Moves `amount` tokens from `from` to `to` using the\n * allowance mechanism. `amount` is then deducted from the caller's\n * allowance.\n *\n * Returns a boolean value indicating whether the operation succeeded.\n *\n * Emits a {Transfer} event.\n */\n function transferFrom(\n address from,\n address to,\n uint256 amount\n ) external returns (bool);\n}\n"
},
"@openzeppelin/contracts/utils/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"
},
"@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Metadata.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../IERC20.sol\";\n\n/**\n * @dev Interface for the optional metadata functions from the ERC20 standard.\n *\n * _Available since v4.1._\n */\ninterface IERC20Metadata is IERC20 {\n /**\n * @dev Returns the name of the token.\n */\n function name() external view returns (string memory);\n\n /**\n * @dev Returns the symbol of the token.\n */\n function symbol() external view returns (string memory);\n\n /**\n * @dev Returns the decimals places of the token.\n */\n function decimals() external view returns (uint8);\n}\n"
},
"@openzeppelin/contracts/token/ERC20/ERC20.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (token/ERC20/ERC20.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IERC20.sol\";\nimport \"./extensions/IERC20Metadata.sol\";\nimport \"../../utils/Context.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.zeppelin.solutions/t/how-to-implement-erc20-supply-mechanisms/226[How\n * to implement supply mechanisms].\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 ERC20 is Context, IERC20, IERC20Metadata {\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 * The default value of {decimals} is 18. To select a different value for\n * {decimals} you should overload it.\n *\n * All two of these values are immutable: they can only be set once during\n * construction.\n */\n constructor(string memory name_, string memory symbol_) {\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 value {ERC20} uses, unless this function is\n * 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(\n address from,\n address to,\n uint256 amount\n ) 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(\n address from,\n address to,\n uint256 amount\n ) 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 }\n _balances[to] += amount;\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 _balances[account] += amount;\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 }\n _totalSupply -= amount;\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(\n address owner,\n address spender,\n uint256 amount\n ) 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(\n address owner,\n address spender,\n uint256 amount\n ) 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(\n address from,\n address to,\n uint256 amount\n ) 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(\n address from,\n address to,\n uint256 amount\n ) internal virtual {}\n}\n"
},
"@openzeppelin/contracts/security/Pausable.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (security/Pausable.sol)\n\npragma solidity ^0.8.0;\n\nimport \"../utils/Context.sol\";\n\n/**\n * @dev Contract module which allows children to implement an emergency stop\n * mechanism that can be triggered by an authorized account.\n *\n * This module is used through inheritance. It will make available the\n * modifiers `whenNotPaused` and `whenPaused`, which can be applied to\n * the functions of your contract. Note that they will not be pausable by\n * simply including this module, only once the modifiers are put in place.\n */\nabstract contract Pausable is Context {\n /**\n * @dev Emitted when the pause is triggered by `account`.\n */\n event Paused(address account);\n\n /**\n * @dev Emitted when the pause is lifted by `account`.\n */\n event Unpaused(address account);\n\n bool private _paused;\n\n /**\n * @dev Initializes the contract in unpaused state.\n */\n constructor() {\n _paused = false;\n }\n\n /**\n * @dev Modifier to make a function callable only when the contract is not paused.\n *\n * Requirements:\n *\n * - The contract must not be paused.\n */\n modifier whenNotPaused() {\n _requireNotPaused();\n _;\n }\n\n /**\n * @dev Modifier to make a function callable only when the contract is paused.\n *\n * Requirements:\n *\n * - The contract must be paused.\n */\n modifier whenPaused() {\n _requirePaused();\n _;\n }\n\n /**\n * @dev Returns true if the contract is paused, and false otherwise.\n */\n function paused() public view virtual returns (bool) {\n return _paused;\n }\n\n /**\n * @dev Throws if the contract is paused.\n */\n function _requireNotPaused() internal view virtual {\n require(!paused(), \"Pausable: paused\");\n }\n\n /**\n * @dev Throws if the contract is not paused.\n */\n function _requirePaused() internal view virtual {\n require(paused(), \"Pausable: not paused\");\n }\n\n /**\n * @dev Triggers stopped state.\n *\n * Requirements:\n *\n * - The contract must not be paused.\n */\n function _pause() internal virtual whenNotPaused {\n _paused = true;\n emit Paused(_msgSender());\n }\n\n /**\n * @dev Returns to normal state.\n *\n * Requirements:\n *\n * - The contract must be paused.\n */\n function _unpause() internal virtual whenPaused {\n _paused = false;\n emit Unpaused(_msgSender());\n }\n}\n"
},
"contracts/TokenSaleCreator.sol": {
"content": "pragma solidity ^0.8.0;\n\nimport \"@openzeppelin/contracts/security/ReentrancyGuard.sol\";\nimport \"@openzeppelin/contracts/security/Pausable.sol\";\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\nimport \"@openzeppelin/contracts/access/AccessControl.sol\";\nimport \"@openzeppelin/contracts/utils/Address.sol\";\nimport \"@openzeppelin/contracts/utils/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"./interfaces/ITokenSaleCreator.sol\";\nimport \"./helpers/TransferHelper.sol\";\n\ncontract TokenSaleCreator is ReentrancyGuard, Pausable, Ownable, AccessControl, ITokenSaleCreator {\n using Address for address;\n using SafeMath for uint256;\n\n bytes32[] public allTokenSales;\n bytes32 public pauserRole = keccak256(abi.encodePacked(\"PAUSER_ROLE\"));\n bytes32 public withdrawerRole = keccak256(abi.encodePacked(\"WITHDRAWER_ROLE\"));\n bytes32 public finalizerRole = keccak256(abi.encodePacked(\"FINALIZER_ROLE\"));\n uint256 public withdrawable;\n\n uint8 public feePercentage;\n uint256 public saleCreationFee;\n\n mapping(bytes32 => TokenSaleItem) private tokenSales;\n mapping(bytes32 => uint256) private totalEtherRaised;\n mapping(bytes32 => mapping(address => bool)) private isNotAllowedToContribute;\n mapping(bytes32 => mapping(address => uint256)) public amountContributed;\n mapping(bytes32 => mapping(address => uint256)) public balance;\n\n modifier whenParamsSatisfied(bytes32 saleId) {\n TokenSaleItem memory tokenSale = tokenSales[saleId];\n require(!tokenSale.interrupted, \"token_sale_paused\");\n require(block.timestamp >= tokenSale.saleStartTime, \"token_sale_not_started_yet\");\n require(!tokenSale.ended, \"token_sale_has_ended\");\n require(!isNotAllowedToContribute[saleId][_msgSender()], \"you_are_not_allowed_to_participate_in_this_sale\");\n require(totalEtherRaised[saleId] < tokenSale.hardCap, \"hardcap_reached\");\n _;\n }\n\n constructor(uint8 _feePercentage, uint256 _saleCreationFee) {\n _grantRole(pauserRole, _msgSender());\n _grantRole(withdrawerRole, _msgSender());\n _grantRole(finalizerRole, _msgSender());\n feePercentage = _feePercentage;\n saleCreationFee = _saleCreationFee;\n }\n\n function initTokenSale(\n address token,\n uint256 tokensForSale,\n uint256 hardCap,\n uint256 softCap,\n uint256 presaleRate,\n uint256 minContributionEther,\n uint256 maxContributionEther,\n uint256 saleStartTime,\n uint256 daysToLast,\n address proceedsTo,\n address admin\n ) external payable whenNotPaused nonReentrant returns (bytes32 saleId) {\n {\n require(msg.value >= saleCreationFee, \"fee\");\n require(token.isContract(), \"must_be_contract_address\");\n require(saleStartTime > block.timestamp && saleStartTime.sub(block.timestamp) >= 24 hours, \"sale_must_begin_in_at_least_24_hours\");\n require(IERC20(token).allowance(_msgSender(), address(this)) >= tokensForSale, \"not_enough_allowance_given\");\n TransferHelpers._safeTransferFromERC20(token, _msgSender(), address(this), tokensForSale);\n }\n saleId = keccak256(\n abi.encodePacked(\n token,\n _msgSender(),\n block.timestamp,\n tokensForSale,\n hardCap,\n softCap,\n presaleRate,\n minContributionEther,\n maxContributionEther,\n saleStartTime,\n daysToLast,\n proceedsTo\n )\n );\n // Added to prevent 'stack too deep' error\n uint256 endTime;\n {\n endTime = saleStartTime.add(daysToLast.mul(1 days));\n tokenSales[saleId] = TokenSaleItem(\n token,\n tokensForSale,\n hardCap,\n softCap,\n presaleRate,\n saleId,\n minContributionEther,\n maxContributionEther,\n saleStartTime,\n endTime,\n false,\n proceedsTo,\n admin,\n tokensForSale,\n false\n );\n }\n allTokenSales.push(saleId);\n withdrawable = msg.value;\n emit TokenSaleItemCreated(\n saleId,\n token,\n tokensForSale,\n hardCap,\n softCap,\n presaleRate,\n minContributionEther,\n maxContributionEther,\n saleStartTime,\n endTime,\n proceedsTo,\n admin\n );\n }\n\n function contribute(bytes32 saleId) external payable whenNotPaused nonReentrant whenParamsSatisfied(saleId) {\n TokenSaleItem storage tokenSaleItem = tokenSales[saleId];\n require(\n msg.value >= tokenSaleItem.minContributionEther && msg.value <= tokenSaleItem.maxContributionEther,\n \"contribution_must_be_within_min_and_max_range\"\n );\n uint256 val = tokenSaleItem.presaleRate.mul(msg.value).div(1 ether);\n require(tokenSaleItem.availableTokens >= val, \"tokens_available_for_sale_is_less\");\n balance[saleId][_msgSender()] = balance[saleId][_msgSender()].add(val);\n amountContributed[saleId][_msgSender()] = amountContributed[saleId][_msgSender()].add(msg.value);\n totalEtherRaised[saleId] = totalEtherRaised[saleId].add(msg.value);\n tokenSaleItem.availableTokens = tokenSaleItem.availableTokens.sub(val);\n }\n\n function normalWithdrawal(bytes32 saleId) external whenNotPaused nonReentrant {\n TokenSaleItem storage tokenSaleItem = tokenSales[saleId];\n require(tokenSaleItem.ended || block.timestamp >= tokenSaleItem.saleEndTime, \"sale_has_not_ended\");\n TransferHelpers._safeTransferERC20(tokenSaleItem.token, _msgSender(), balance[saleId][_msgSender()]);\n delete balance[saleId][_msgSender()];\n }\n\n function emergencyWithdrawal(bytes32 saleId) external nonReentrant {\n TokenSaleItem storage tokenSaleItem = tokenSales[saleId];\n require(!tokenSaleItem.ended, \"sale_has_already_ended\");\n TransferHelpers._safeTransferEther(_msgSender(), amountContributed[saleId][_msgSender()]);\n tokenSaleItem.availableTokens = tokenSaleItem.availableTokens.add(balance[saleId][_msgSender()]);\n totalEtherRaised[saleId] = totalEtherRaised[saleId].sub(amountContributed[saleId][_msgSender()]);\n delete balance[saleId][_msgSender()];\n delete amountContributed[saleId][_msgSender()];\n }\n\n function interruptTokenSale(bytes32 saleId) external whenNotPaused onlyOwner {\n TokenSaleItem storage tokenSale = tokenSales[saleId];\n require(!tokenSale.ended, \"token_sale_has_ended\");\n tokenSale.interrupted = true;\n }\n\n function uninterruptTokenSale(bytes32 saleId) external whenNotPaused onlyOwner {\n TokenSaleItem storage tokenSale = tokenSales[saleId];\n tokenSale.interrupted = false;\n }\n\n function finalizeTokenSale(bytes32 saleId) external whenNotPaused {\n TokenSaleItem storage tokenSale = tokenSales[saleId];\n require(hasRole(finalizerRole, _msgSender()) || tokenSale.admin == _msgSender(), \"only_finalizer_or_admin\");\n require(!tokenSale.ended, \"sale_has_ended\");\n uint256 launchpadProfit = (totalEtherRaised[saleId] * uint256(feePercentage)).div(100);\n TransferHelpers._safeTransferEther(tokenSale.proceedsTo, totalEtherRaised[saleId].sub(launchpadProfit));\n withdrawable = withdrawable.add(launchpadProfit);\n\n if (tokenSale.availableTokens > 0) {\n TransferHelpers._safeTransferERC20(tokenSale.token, tokenSale.proceedsTo, tokenSale.availableTokens);\n }\n\n tokenSale.ended = true;\n }\n\n function barFromParticiption(bytes32 saleId, address account) external {\n TokenSaleItem memory tokenSale = tokenSales[saleId];\n require(tokenSale.admin == _msgSender(), \"only_admin\");\n require(!tokenSale.ended, \"sale_has_ended\");\n require(!isNotAllowedToContribute[saleId][account], \"already_barred\");\n isNotAllowedToContribute[saleId][account] = true;\n }\n\n function rescindBar(bytes32 saleId, address account) external {\n TokenSaleItem memory tokenSale = tokenSales[saleId];\n require(tokenSale.admin == _msgSender(), \"only_admin\");\n require(!tokenSale.ended, \"sale_has_ended\");\n require(isNotAllowedToContribute[saleId][account], \"not_barred\");\n isNotAllowedToContribute[saleId][account] = false;\n }\n\n function pause() external whenNotPaused {\n require(hasRole(pauserRole, _msgSender()), \"must_have_pauser_role\");\n _pause();\n }\n\n function unpause() external whenPaused {\n require(hasRole(pauserRole, _msgSender()), \"must_have_pauser_role\");\n _unpause();\n }\n\n function getTotalEtherRaisedForSale(bytes32 saleId) external view returns (uint256) {\n return totalEtherRaised[saleId];\n }\n\n function getExpectedEtherRaiseForSale(bytes32 saleId) external view returns (uint256) {\n TokenSaleItem memory tokenSaleItem = tokenSales[saleId];\n return tokenSaleItem.hardCap;\n }\n\n function getSoftCap(bytes32 saleId) external view returns (uint256) {\n TokenSaleItem memory tokenSaleItem = tokenSales[saleId];\n return tokenSaleItem.softCap;\n }\n\n function withdrawProfit(address to) external {\n require(hasRole(withdrawerRole, _msgSender()) || _msgSender() == owner(), \"only_withdrawer_or_owner\");\n TransferHelpers._safeTransferEther(to, withdrawable);\n withdrawable = 0;\n }\n\n function setFeePercentage(uint8 _feePercentage) external onlyOwner {\n feePercentage = _feePercentage;\n }\n\n function setSaleCreationFee(uint256 _saleCreationFee) external onlyOwner {\n saleCreationFee = _saleCreationFee;\n }\n\n receive() external payable {\n withdrawable = withdrawable.add(msg.value);\n }\n}\n"
},
"contracts/interfaces/ITokenSaleCreator.sol": {
"content": "pragma solidity ^0.8.0;\n\ninterface ITokenSaleCreator {\n struct TokenSaleItem {\n address token;\n uint256 tokensForSale;\n uint256 hardCap;\n uint256 softCap;\n uint256 presaleRate;\n bytes32 saleId;\n uint256 minContributionEther;\n uint256 maxContributionEther;\n uint256 saleStartTime;\n uint256 saleEndTime;\n bool interrupted;\n address proceedsTo;\n address admin;\n uint256 availableTokens;\n bool ended;\n }\n\n event TokenSaleItemCreated(\n bytes32 saleId,\n address token,\n uint256 tokensForSale,\n uint256 hardCap,\n uint256 softCap,\n uint256 presaleRate,\n uint256 minContributionEther,\n uint256 maxContributionEther,\n uint256 saleStartTime,\n uint256 saleEndTime,\n address proceedsTo,\n address admin\n );\n\n function initTokenSale(\n address token,\n uint256 tokensForSale,\n uint256 hardCap,\n uint256 softCap,\n uint256 presaleRate,\n uint256 minContributionEther,\n uint256 maxContributionEther,\n uint256 saleStartTime,\n uint256 daysToLast,\n address proceedsTo,\n address admin\n ) external payable returns (bytes32 saleId);\n\n function interruptTokenSale(bytes32 saleId) external;\n\n function allTokenSales(uint256) external view returns (bytes32);\n\n function feePercentage() external view returns (uint8);\n\n function balance(bytes32 saleId, address account) external view returns (uint256);\n\n function amountContributed(bytes32 saleId, address account) external view returns (uint256);\n}\n"
},
"@openzeppelin/contracts/security/ReentrancyGuard.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)\n\npragma solidity ^0.8.0;\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 ReentrancyGuard {\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 constructor() {\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 // On the first call to nonReentrant, _notEntered will be true\n require(_status != _ENTERED, \"ReentrancyGuard: reentrant call\");\n\n // Any calls to nonReentrant after this point will fail\n _status = _ENTERED;\n\n _;\n\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"
},
"@openzeppelin/contracts/access/AccessControl.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (access/AccessControl.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IAccessControl.sol\";\nimport \"../utils/Context.sol\";\nimport \"../utils/Strings.sol\";\nimport \"../utils/introspection/ERC165.sol\";\n\n/**\n * @dev Contract module that allows children to implement role-based access\n * control mechanisms. This is a lightweight version that doesn't allow enumerating role\n * members except through off-chain means by accessing the contract event logs. Some\n * applications may benefit from on-chain enumerability, for those cases see\n * {AccessControlEnumerable}.\n *\n * Roles are referred to by their `bytes32` identifier. These should be exposed\n * in the external API and be unique. The best way to achieve this is by\n * using `public constant` hash digests:\n *\n * ```\n * bytes32 public constant MY_ROLE = keccak256(\"MY_ROLE\");\n * ```\n *\n * Roles can be used to represent a set of permissions. To restrict access to a\n * function call, use {hasRole}:\n *\n * ```\n * function foo() public {\n * require(hasRole(MY_ROLE, msg.sender));\n * ...\n * }\n * ```\n *\n * Roles can be granted and revoked dynamically via the {grantRole} and\n * {revokeRole} functions. Each role has an associated admin role, and only\n * accounts that have a role's admin role can call {grantRole} and {revokeRole}.\n *\n * By default, the admin role for all roles is `DEFAULT_ADMIN_ROLE`, which means\n * that only accounts with this role will be able to grant or revoke other\n * roles. More complex role relationships can be created by using\n * {_setRoleAdmin}.\n *\n * WARNING: The `DEFAULT_ADMIN_ROLE` is also its own admin: it has permission to\n * grant and revoke this role. Extra precautions should be taken to secure\n * accounts that have been granted it.\n */\nabstract contract AccessControl is Context, IAccessControl, ERC165 {\n struct RoleData {\n mapping(address => bool) members;\n bytes32 adminRole;\n }\n\n mapping(bytes32 => RoleData) private _roles;\n\n bytes32 public constant DEFAULT_ADMIN_ROLE = 0x00;\n\n /**\n * @dev Modifier that checks that an account has a specific role. Reverts\n * with a standardized message including the required role.\n *\n * The format of the revert reason is given by the following regular expression:\n *\n * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/\n *\n * _Available since v4.1._\n */\n modifier onlyRole(bytes32 role) {\n _checkRole(role);\n _;\n }\n\n /**\n * @dev See {IERC165-supportsInterface}.\n */\n function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n return interfaceId == type(IAccessControl).interfaceId || super.supportsInterface(interfaceId);\n }\n\n /**\n * @dev Returns `true` if `account` has been granted `role`.\n */\n function hasRole(bytes32 role, address account) public view virtual override returns (bool) {\n return _roles[role].members[account];\n }\n\n /**\n * @dev Revert with a standard message if `_msgSender()` is missing `role`.\n * Overriding this function changes the behavior of the {onlyRole} modifier.\n *\n * Format of the revert message is described in {_checkRole}.\n *\n * _Available since v4.6._\n */\n function _checkRole(bytes32 role) internal view virtual {\n _checkRole(role, _msgSender());\n }\n\n /**\n * @dev Revert with a standard message if `account` is missing `role`.\n *\n * The format of the revert reason is given by the following regular expression:\n *\n * /^AccessControl: account (0x[0-9a-f]{40}) is missing role (0x[0-9a-f]{64})$/\n */\n function _checkRole(bytes32 role, address account) internal view virtual {\n if (!hasRole(role, account)) {\n revert(\n string(\n abi.encodePacked(\n \"AccessControl: account \",\n Strings.toHexString(uint160(account), 20),\n \" is missing role \",\n Strings.toHexString(uint256(role), 32)\n )\n )\n );\n }\n }\n\n /**\n * @dev Returns the admin role that controls `role`. See {grantRole} and\n * {revokeRole}.\n *\n * To change a role's admin, use {_setRoleAdmin}.\n */\n function getRoleAdmin(bytes32 role) public view virtual override returns (bytes32) {\n return _roles[role].adminRole;\n }\n\n /**\n * @dev Grants `role` to `account`.\n *\n * If `account` had not been already granted `role`, emits a {RoleGranted}\n * event.\n *\n * Requirements:\n *\n * - the caller must have ``role``'s admin role.\n *\n * May emit a {RoleGranted} event.\n */\n function grantRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {\n _grantRole(role, account);\n }\n\n /**\n * @dev Revokes `role` from `account`.\n *\n * If `account` had been granted `role`, emits a {RoleRevoked} event.\n *\n * Requirements:\n *\n * - the caller must have ``role``'s admin role.\n *\n * May emit a {RoleRevoked} event.\n */\n function revokeRole(bytes32 role, address account) public virtual override onlyRole(getRoleAdmin(role)) {\n _revokeRole(role, account);\n }\n\n /**\n * @dev Revokes `role` from the calling account.\n *\n * Roles are often managed via {grantRole} and {revokeRole}: this function's\n * purpose is to provide a mechanism for accounts to lose their privileges\n * if they are compromised (such as when a trusted device is misplaced).\n *\n * If the calling account had been revoked `role`, emits a {RoleRevoked}\n * event.\n *\n * Requirements:\n *\n * - the caller must be `account`.\n *\n * May emit a {RoleRevoked} event.\n */\n function renounceRole(bytes32 role, address account) public virtual override {\n require(account == _msgSender(), \"AccessControl: can only renounce roles for self\");\n\n _revokeRole(role, account);\n }\n\n /**\n * @dev Grants `role` to `account`.\n *\n * If `account` had not been already granted `role`, emits a {RoleGranted}\n * event. Note that unlike {grantRole}, this function doesn't perform any\n * checks on the calling account.\n *\n * May emit a {RoleGranted} event.\n *\n * [WARNING]\n * ====\n * This function should only be called from the constructor when setting\n * up the initial roles for the system.\n *\n * Using this function in any other way is effectively circumventing the admin\n * system imposed by {AccessControl}.\n * ====\n *\n * NOTE: This function is deprecated in favor of {_grantRole}.\n */\n function _setupRole(bytes32 role, address account) internal virtual {\n _grantRole(role, account);\n }\n\n /**\n * @dev Sets `adminRole` as ``role``'s admin role.\n *\n * Emits a {RoleAdminChanged} event.\n */\n function _setRoleAdmin(bytes32 role, bytes32 adminRole) internal virtual {\n bytes32 previousAdminRole = getRoleAdmin(role);\n _roles[role].adminRole = adminRole;\n emit RoleAdminChanged(role, previousAdminRole, adminRole);\n }\n\n /**\n * @dev Grants `role` to `account`.\n *\n * Internal function without access restriction.\n *\n * May emit a {RoleGranted} event.\n */\n function _grantRole(bytes32 role, address account) internal virtual {\n if (!hasRole(role, account)) {\n _roles[role].members[account] = true;\n emit RoleGranted(role, account, _msgSender());\n }\n }\n\n /**\n * @dev Revokes `role` from `account`.\n *\n * Internal function without access restriction.\n *\n * May emit a {RoleRevoked} event.\n */\n function _revokeRole(bytes32 role, address account) internal virtual {\n if (hasRole(role, account)) {\n _roles[role].members[account] = false;\n emit RoleRevoked(role, account, _msgSender());\n }\n }\n}\n"
},
"@openzeppelin/contracts/access/IAccessControl.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (access/IAccessControl.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev External interface of AccessControl declared to support ERC165 detection.\n */\ninterface IAccessControl {\n /**\n * @dev Emitted when `newAdminRole` is set as ``role``'s admin role, replacing `previousAdminRole`\n *\n * `DEFAULT_ADMIN_ROLE` is the starting admin for all roles, despite\n * {RoleAdminChanged} not being emitted signaling this.\n *\n * _Available since v3.1._\n */\n event RoleAdminChanged(bytes32 indexed role, bytes32 indexed previousAdminRole, bytes32 indexed newAdminRole);\n\n /**\n * @dev Emitted when `account` is granted `role`.\n *\n * `sender` is the account that originated the contract call, an admin role\n * bearer except when using {AccessControl-_setupRole}.\n */\n event RoleGranted(bytes32 indexed role, address indexed account, address indexed sender);\n\n /**\n * @dev Emitted when `account` is revoked `role`.\n *\n * `sender` is the account that originated the contract call:\n * - if using `revokeRole`, it is the admin role bearer\n * - if using `renounceRole`, it is the role bearer (i.e. `account`)\n */\n event RoleRevoked(bytes32 indexed role, address indexed account, address indexed sender);\n\n /**\n * @dev Returns `true` if `account` has been granted `role`.\n */\n function hasRole(bytes32 role, address account) external view returns (bool);\n\n /**\n * @dev Returns the admin role that controls `role`. See {grantRole} and\n * {revokeRole}.\n *\n * To change a role's admin, use {AccessControl-_setRoleAdmin}.\n */\n function getRoleAdmin(bytes32 role) external view returns (bytes32);\n\n /**\n * @dev Grants `role` to `account`.\n *\n * If `account` had not been already granted `role`, emits a {RoleGranted}\n * event.\n *\n * Requirements:\n *\n * - the caller must have ``role``'s admin role.\n */\n function grantRole(bytes32 role, address account) external;\n\n /**\n * @dev Revokes `role` from `account`.\n *\n * If `account` had been granted `role`, emits a {RoleRevoked} event.\n *\n * Requirements:\n *\n * - the caller must have ``role``'s admin role.\n */\n function revokeRole(bytes32 role, address account) external;\n\n /**\n * @dev Revokes `role` from the calling account.\n *\n * Roles are often managed via {grantRole} and {revokeRole}: this function's\n * purpose is to provide a mechanism for accounts to lose their privileges\n * if they are compromised (such as when a trusted device is misplaced).\n *\n * If the calling account had been granted `role`, emits a {RoleRevoked}\n * event.\n *\n * Requirements:\n *\n * - the caller must be `account`.\n */\n function renounceRole(bytes32 role, address account) external;\n}\n"
},
"@openzeppelin/contracts/utils/Strings.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts (last updated v4.7.0) (utils/Strings.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev String operations.\n */\nlibrary Strings {\n bytes16 private constant _HEX_SYMBOLS = \"0123456789abcdef\";\n uint8 private constant _ADDRESS_LENGTH = 20;\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` decimal representation.\n */\n function toString(uint256 value) internal pure returns (string memory) {\n // Inspired by OraclizeAPI's implementation - MIT licence\n // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol\n\n if (value == 0) {\n return \"0\";\n }\n uint256 temp = value;\n uint256 digits;\n while (temp != 0) {\n digits++;\n temp /= 10;\n }\n bytes memory buffer = new bytes(digits);\n while (value != 0) {\n digits -= 1;\n buffer[digits] = bytes1(uint8(48 + uint256(value % 10)));\n value /= 10;\n }\n return string(buffer);\n }\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.\n */\n function toHexString(uint256 value) internal pure returns (string memory) {\n if (value == 0) {\n return \"0x00\";\n }\n uint256 temp = value;\n uint256 length = 0;\n while (temp != 0) {\n length++;\n temp >>= 8;\n }\n return toHexString(value, length);\n }\n\n /**\n * @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.\n */\n function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {\n bytes memory buffer = new bytes(2 * length + 2);\n buffer[0] = \"0\";\n buffer[1] = \"x\";\n for (uint256 i = 2 * length + 1; i > 1; --i) {\n buffer[i] = _HEX_SYMBOLS[value & 0xf];\n value >>= 4;\n }\n require(value == 0, \"Strings: hex length insufficient\");\n return string(buffer);\n }\n\n /**\n * @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal representation.\n */\n function toHexString(address addr) internal pure returns (string memory) {\n return toHexString(uint256(uint160(addr)), _ADDRESS_LENGTH);\n }\n}\n"
},
"@openzeppelin/contracts/utils/introspection/ERC165.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/introspection/ERC165.sol)\n\npragma solidity ^0.8.0;\n\nimport \"./IERC165.sol\";\n\n/**\n * @dev Implementation of the {IERC165} interface.\n *\n * Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check\n * for the additional interface id that will be supported. For example:\n *\n * ```solidity\n * function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n * return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);\n * }\n * ```\n *\n * Alternatively, {ERC165Storage} provides an easier to use but more expensive implementation.\n */\nabstract contract ERC165 is IERC165 {\n /**\n * @dev See {IERC165-supportsInterface}.\n */\n function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {\n return interfaceId == type(IERC165).interfaceId;\n }\n}\n"
},
"@openzeppelin/contracts/utils/introspection/IERC165.sol": {
"content": "// SPDX-License-Identifier: MIT\n// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)\n\npragma solidity ^0.8.0;\n\n/**\n * @dev Interface of the ERC165 standard, as defined in the\n * https://eips.ethereum.org/EIPS/eip-165[EIP].\n *\n * Implementers can declare support of contract interfaces, which can then be\n * queried by others ({ERC165Checker}).\n *\n * For an implementation, see {ERC165}.\n */\ninterface IERC165 {\n /**\n * @dev Returns true if this contract implements the interface defined by\n * `interfaceId`. See the corresponding\n * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]\n * to learn more about how these ids are created.\n *\n * This function call must use less than 30 000 gas.\n */\n function supportsInterface(bytes4 interfaceId) external view returns (bool);\n}\n"
},
"contracts/USDB.sol": {
"content": "pragma solidity ^0.8.0;\n\nimport \"@openzeppelin/contracts/token/ERC20/ERC20.sol\";\nimport \"@openzeppelin/contracts/access/AccessControl.sol\";\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\nimport \"@openzeppelin/contracts/utils/math/SafeMath.sol\";\nimport \"./helpers/TransferHelper.sol\";\nimport \"./interfaces/IvToken.sol\";\n\ncontract USDB is ERC20, AccessControl, Ownable, IvToken {\n using SafeMath for uint256;\n\n bytes32 public excludedFromTaxRole = keccak256(abi.encodePacked(\"EXCLUDED_FROM_TAX\"));\n bytes32 public retrieverRole = keccak256(abi.encodePacked(\"RETRIEVER_ROLE\"));\n bytes32 public minterRole = keccak256(abi.encodePacked(\"MINTER_ROLE\"));\n address public taxCollector;\n uint8 public taxPercentage;\n\n constructor(\n string memory name_,\n string memory symbol_,\n uint256 amount,\n address tCollector,\n uint8 tPercentage\n ) ERC20(name_, symbol_) {\n _grantRole(excludedFromTaxRole, _msgSender());\n _grantRole(retrieverRole, _msgSender());\n _mint(_msgSender(), amount);\n {\n taxCollector = tCollector;\n taxPercentage = tPercentage;\n }\n }\n\n function _transfer(\n address sender,\n address recipient,\n uint256 amount\n ) internal virtual override(ERC20) {\n if (!hasRole(excludedFromTaxRole, sender) && sender != address(this)) {\n uint256 tax = amount.mul(uint256(taxPercentage)).div(100);\n super._transfer(sender, taxCollector, tax);\n super._transfer(sender, recipient, amount.sub(tax));\n } else {\n super._transfer(sender, recipient, amount);\n }\n }\n\n function mint(address to, uint256 amount) external {\n require(hasRole(minterRole, _msgSender()), \"only_minter\");\n _mint(to, amount);\n }\n\n function burn(address account, uint256 amount) external {\n require(hasRole(minterRole, _msgSender()), \"only_minter\");\n _burn(account, amount);\n }\n\n function retrieveEther(address to) external {\n require(hasRole(retrieverRole, _msgSender()), \"only_retriever\");\n TransferHelpers._safeTransferEther(to, address(this).balance);\n }\n\n function retrieveERC20(\n address token,\n address to,\n uint256 amount\n ) external {\n require(hasRole(retrieverRole, _msgSender()), \"only_retriever\");\n TransferHelpers._safeTransferERC20(token, to, amount);\n }\n\n function excludeFromPayingTax(address account) external onlyOwner {\n require(!hasRole(excludedFromTaxRole, account), \"already_excluded_from_paying_tax\");\n _grantRole(excludedFromTaxRole, account);\n }\n\n function includeInPayingTax(address account) external onlyOwner {\n require(hasRole(excludedFromTaxRole, account), \"not_paying_tax\");\n _revokeRole(excludedFromTaxRole, account);\n }\n\n function addRetriever(address account) external onlyOwner {\n require(!hasRole(retrieverRole, account), \"already_retriever\");\n _grantRole(retrieverRole, account);\n }\n\n function removeRetriever(address account) external onlyOwner {\n require(hasRole(retrieverRole, account), \"not_retriever\");\n _revokeRole(retrieverRole, account);\n }\n\n function setTaxPercentage(uint8 tPercentage) external onlyOwner {\n require(tPercentage <= 10, \"tax_must_be_ten_percent_or_less\");\n taxPercentage = tPercentage;\n }\n\n function setMinter(address account) external onlyOwner {\n require(!hasRole(minterRole, account), \"already_minter\");\n _grantRole(minterRole, account);\n }\n\n function removeMinter(address account) external onlyOwner {\n require(hasRole(minterRole, account), \"not_a_minter\");\n _revokeRole(minterRole, account);\n }\n\n function setTaxCollector(address tCollector) external onlyOwner {\n taxCollector = tCollector;\n }\n\n receive() external payable {}\n}\n"
},
"contracts/interfaces/IvToken.sol": {
"content": "pragma solidity ^0.8.0;\n\ninterface IvToken {\n function mint(address to, uint256 amount) external;\n\n function burn(address account, uint256 amount) external;\n}\n"
},
"contracts/StakingPoolActions.sol": {
"content": "pragma solidity ^0.8.0;\n\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\nimport \"@openzeppelin/contracts/access/AccessControl.sol\";\nimport \"./StakingPool.sol\";\nimport \"./helpers/TransferHelper.sol\";\n\ncontract StakingPoolActions is Ownable, AccessControl {\n uint256 public deploymentFee;\n\n bytes32 public feeTakerRole = keccak256(abi.encodePacked(\"FEE_TAKER_ROLE\"));\n bytes32 public feeSetterRole = keccak256(abi.encodePacked(\"FEE_SETTER_ROLE\"));\n\n mapping(address => address[]) public stakingPools;\n\n event StakingPoolDeployed(address poolId, address owner, address token0, address token1, uint256 apy1, uint256 apy2, uint256 tax);\n\n constructor(uint256 _deploymentFee) {\n deploymentFee = _deploymentFee;\n _grantRole(feeTakerRole, _msgSender());\n _grantRole(feeSetterRole, _msgSender());\n }\n\n function deployStakingPool(\n address token0,\n address token1,\n uint16 apy1,\n uint16 apy2,\n uint8 taxPercentage,\n uint256 withdrawalIntervals\n ) external payable returns (address poolId) {\n require(msg.value >= deploymentFee);\n bytes memory bytecode = abi.encodePacked(\n type(StakingPool).creationCode,\n abi.encode(_msgSender(), token0, token1, apy1, apy2, taxPercentage, withdrawalIntervals)\n );\n bytes32 salt = keccak256(abi.encodePacked(token0, token1, apy1, apy2, _msgSender(), block.timestamp));\n\n assembly {\n poolId := create2(0, add(bytecode, 32), mload(bytecode), salt)\n if iszero(extcodesize(poolId)) {\n revert(0, 0)\n }\n }\n\n address[] storage usersPools = stakingPools[_msgSender()];\n usersPools.push(poolId);\n\n emit StakingPoolDeployed(poolId, _msgSender(), token0, token1, apy1, apy2, taxPercentage);\n }\n\n function withdrawEther(address to) external {\n require(hasRole(feeTakerRole, _msgSender()));\n TransferHelpers._safeTransferEther(to, address(this).balance);\n }\n\n function withdrawToken(\n address token,\n address to,\n uint256 amount\n ) external {\n require(hasRole(feeTakerRole, _msgSender()));\n TransferHelpers._safeTransferERC20(token, to, amount);\n }\n\n function setFee(uint256 _fee) external {\n require(hasRole(feeSetterRole, _msgSender()));\n deploymentFee = _fee;\n }\n\n function setFeeSetter(address account) external onlyOwner {\n require(!hasRole(feeSetterRole, account));\n _grantRole(feeSetterRole, account);\n }\n\n function removeFeeSetter(address account) external onlyOwner {\n require(hasRole(feeSetterRole, account));\n _revokeRole(feeSetterRole, account);\n }\n\n function setFeeTaker(address account) external onlyOwner {\n require(!hasRole(feeTakerRole, account));\n _grantRole(feeTakerRole, account);\n }\n\n function removeFeeTaker(address account) external onlyOwner {\n require(hasRole(feeTakerRole, account));\n _revokeRole(feeTakerRole, account);\n }\n\n receive() external payable {}\n}\n"
},
"contracts/StakingPool.sol": {
"content": "pragma solidity ^0.8.0;\n\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\nimport \"@openzeppelin/contracts/access/AccessControl.sol\";\nimport \"@openzeppelin/contracts/security/Pausable.sol\";\nimport \"@openzeppelin/contracts/security/ReentrancyGuard.sol\";\nimport \"@openzeppelin/contracts/utils/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts/utils/Address.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"./interfaces/IStakingPool.sol\";\nimport \"./helpers/TransferHelper.sol\";\n\ncontract StakingPool is Ownable, AccessControl, Pausable, ReentrancyGuard, IStakingPool {\n using SafeMath for uint256;\n using Address for address;\n\n bytes32 public pauserRole = keccak256(abi.encodePacked(\"PAUSER_ROLE\"));\n address public immutable tokenA;\n address public immutable tokenB;\n uint16 public tokenAAPY;\n uint16 public tokenBAPY;\n uint8 public stakingPoolTax;\n uint256 public withdrawalIntervals;\n\n mapping(bytes32 => Stake) public stakes;\n mapping(address => bytes32[]) public poolsByAddresses;\n mapping(address => bool) public blockedAddresses;\n mapping(address => uint256) public nonWithdrawableERC20;\n\n bytes32[] public stakeIDs;\n\n constructor(\n address newOwner,\n address token0,\n address token1,\n uint16 apy1,\n uint16 apy2,\n uint8 poolTax,\n uint256 intervals\n ) {\n require(token0.isContract());\n require(token1.isContract());\n tokenA = token0;\n tokenB = token1;\n tokenAAPY = apy1;\n tokenBAPY = apy2;\n stakingPoolTax = poolTax;\n withdrawalIntervals = intervals;\n _grantRole(pauserRole, _msgSender());\n _grantRole(pauserRole, newOwner);\n _transferOwnership(newOwner);\n }\n\n function calculateReward(bytes32 stakeId) public view returns (uint256 reward) {\n Stake memory stake = stakes[stakeId];\n uint256 percentage;\n if (stake.tokenStaked == tokenA) {\n // How much percentage reward does this staker yield?\n percentage = uint256(tokenBAPY).mul(block.timestamp.sub(stake.since) / (60 * 60 * 24 * 7 * 4)).div(12);\n } else {\n percentage = uint256(tokenAAPY).mul(block.timestamp.sub(stake.since) / (60 * 60 * 24 * 7 * 4)).div(12);\n }\n\n reward = stake.amountStaked.mul(percentage) / 100;\n }\n\n function stakeAsset(address token, uint256 amount) external whenNotPaused nonReentrant {\n require(token == tokenA || token == tokenB);\n require(token.isContract());\n require(!blockedAddresses[_msgSender()]);\n require(amount > 0);\n uint256 tax = amount.mul(stakingPoolTax) / 100;\n require(IERC20(token).allowance(_msgSender(), address(this)) >= amount);\n TransferHelpers._safeTransferFromERC20(token, _msgSender(), address(this), amount);\n bytes32 stakeId = keccak256(abi.encodePacked(_msgSender(), address(this), token, block.timestamp));\n Stake memory stake = Stake({\n amountStaked: amount.sub(tax),\n tokenStaked: token,\n since: block.timestamp,\n staker: _msgSender(),\n stakeId: stakeId,\n nextWithdrawalTime: block.timestamp.add(withdrawalIntervals)\n });\n stakes[stakeId] = stake;\n bytes32[] storage stakez = poolsByAddresses[_msgSender()];\n stakez.push(stakeId);\n stakeIDs.push(stakeId);\n nonWithdrawableERC20[token] = nonWithdrawableERC20[token].add(stake.amountStaked);\n emit Staked(amount, token, stake.since, _msgSender(), stakeId);\n }\n\n function unstakeAmount(bytes32 stakeId, uint256 amount) external whenNotPaused nonReentrant {\n Stake storage stake = stakes[stakeId];\n require(_msgSender() == stake.staker);\n TransferHelpers._safeTransferERC20(stake.tokenStaked, _msgSender(), amount);\n stake.amountStaked = stake.amountStaked.sub(amount);\n nonWithdrawableERC20[stake.tokenStaked] = nonWithdrawableERC20[stake.tokenStaked].sub(amount);\n emit Unstaked(amount, stakeId);\n }\n\n function unstakeAll(bytes32 stakeId) external nonReentrant {\n Stake memory stake = stakes[stakeId];\n require(_msgSender() == stake.staker);\n TransferHelpers._safeTransferERC20(stake.tokenStaked, _msgSender(), stake.amountStaked);\n delete stakes[stakeId];\n\n bytes32[] storage stakez = poolsByAddresses[_msgSender()];\n\n for (uint256 i = 0; i < stakez.length; i++) {\n if (stakez[i] == stakeId) {\n stakez[i] = bytes32(0);\n }\n }\n nonWithdrawableERC20[stake.tokenStaked] = nonWithdrawableERC20[stake.tokenStaked].sub(stake.amountStaked);\n emit Unstaked(stake.amountStaked, stakeId);\n }\n\n function withdrawRewards(bytes32 stakeId) external whenNotPaused nonReentrant {\n Stake storage stake = stakes[stakeId];\n require(_msgSender() == stake.staker);\n require(block.timestamp >= stake.nextWithdrawalTime, \"cannot_withdraw_now\");\n uint256 reward = calculateReward(stakeId);\n address token = stake.tokenStaked == tokenA ? tokenB : tokenA;\n uint256 amount = stake.amountStaked.add(reward);\n TransferHelpers._safeTransferERC20(token, stake.staker, amount);\n stake.since = block.timestamp;\n stake.nextWithdrawalTime = block.timestamp.add(withdrawalIntervals);\n emit Withdrawn(amount, stakeId);\n }\n\n function retrieveEther(address to) external onlyOwner {\n TransferHelpers._safeTransferEther(to, address(this).balance);\n }\n\n function setStakingPoolTax(uint8 poolTax) external onlyOwner {\n stakingPoolTax = poolTax;\n }\n\n function retrieveERC20(\n address token,\n address to,\n uint256 amount\n ) external onlyOwner {\n require(token.isContract(), \"must_be_contract_address\");\n uint256 bal = IERC20(token).balanceOf(address(this));\n require(bal > nonWithdrawableERC20[token], \"balance_lower_than_staked\");\n\n if (nonWithdrawableERC20[token] > 0) {\n require(bal.sub(amount) < nonWithdrawableERC20[token], \"amount_must_be_less_than_staked\");\n }\n\n TransferHelpers._safeTransferERC20(token, to, amount);\n }\n\n function pause() external {\n require(hasRole(pauserRole, _msgSender()));\n _pause();\n }\n\n function unpause() external {\n require(hasRole(pauserRole, _msgSender()));\n _unpause();\n }\n\n receive() external payable {}\n}\n"
},
"contracts/interfaces/IStakingPool.sol": {
"content": "pragma solidity ^0.8.0;\n\ninterface IStakingPool {\n struct Stake {\n uint256 amountStaked;\n address tokenStaked;\n uint256 since;\n address staker;\n bytes32 stakeId;\n uint256 nextWithdrawalTime;\n }\n\n event Staked(uint256 amount, address token, uint256 since, address staker, bytes32 stakeId);\n event Unstaked(uint256 amount, bytes32 stakeId);\n event Withdrawn(uint256 amount, bytes32 stakeId);\n\n function stakes(bytes32)\n external\n view\n returns (\n uint256,\n address,\n uint256,\n address,\n bytes32,\n uint256\n );\n\n // function poolsByAddresses(address) external view returns (bytes32[] memory);\n\n function blockedAddresses(address) external view returns (bool);\n\n function stakeIDs(uint256) external view returns (bytes32);\n\n function stakingPoolTax() external view returns (uint8);\n\n function tokenA() external view returns (address);\n\n function tokenB() external view returns (address);\n\n function stakeAsset(address, uint256) external;\n\n function withdrawRewards(bytes32) external;\n\n function tokenAAPY() external view returns (uint16);\n\n function tokenBAPY() external view returns (uint16);\n\n function withdrawalIntervals() external view returns (uint256);\n\n function unstakeAmount(bytes32, uint256) external;\n\n function unstakeAll(bytes32) external;\n}\n"
},
"contracts/SpecialStakingPool.sol": {
"content": "pragma solidity ^0.8.0;\n\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\nimport \"@openzeppelin/contracts/access/AccessControl.sol\";\nimport \"@openzeppelin/contracts/security/Pausable.sol\";\nimport \"@openzeppelin/contracts/security/ReentrancyGuard.sol\";\nimport \"@openzeppelin/contracts/utils/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts/utils/Address.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"./helpers/TransferHelper.sol\";\nimport \"./interfaces/IStakingPool.sol\";\nimport \"./interfaces/IvToken.sol\";\n\ncontract SpecialStakingPool is Ownable, AccessControl, Pausable, ReentrancyGuard, IStakingPool {\n using SafeMath for uint256;\n using Address for address;\n\n address public immutable tokenA;\n address public immutable tokenB;\n\n uint16 public tokenAAPY;\n uint16 public tokenBAPY;\n uint8 public stakingPoolTax;\n uint256 public withdrawalIntervals;\n\n bytes32 public pauserRole = keccak256(abi.encodePacked(\"PAUSER_ROLE\"));\n bytes32 public apySetterRole = keccak256(abi.encodePacked(\"APY_SETTER_ROLE\"));\n\n mapping(bytes32 => Stake) public stakes;\n mapping(address => bytes32[]) public poolsByAddresses;\n mapping(address => bool) public blockedAddresses;\n mapping(address => uint256) public nonWithdrawableERC20;\n\n bytes32[] public stakeIDs;\n\n uint256 public withdrawable;\n\n constructor(\n address newOwner,\n address A,\n address B,\n uint16 aAPY,\n uint16 bAPY,\n uint8 stakingTax,\n uint256 intervals\n ) {\n require(A == address(0) || A.isContract(), \"A_must_be_zero_address_or_contract\");\n require(B.isContract(), \"B_must_be_contract\");\n tokenA = A;\n tokenB = B;\n tokenAAPY = aAPY;\n tokenBAPY = bAPY;\n stakingPoolTax = stakingTax;\n withdrawalIntervals = intervals;\n _transferOwnership(newOwner);\n _grantRole(pauserRole, newOwner);\n _grantRole(apySetterRole, newOwner);\n }\n\n function calculateReward(bytes32 stakeId) public view returns (uint256 reward) {\n Stake memory stake = stakes[stakeId];\n uint256 percentage;\n if (stake.tokenStaked == tokenA) {\n // How much percentage reward does this staker yield?\n percentage = uint256(tokenBAPY).mul(block.timestamp.sub(stake.since) / (60 * 60 * 24 * 7 * 4)).div(12);\n } else {\n percentage = uint256(tokenAAPY).mul(block.timestamp.sub(stake.since) / (60 * 60 * 24 * 7 * 4)).div(12);\n }\n\n reward = stake.amountStaked.mul(percentage) / 100;\n }\n\n function stakeEther() external payable whenNotPaused nonReentrant {\n require(!blockedAddresses[_msgSender()], \"blocked\");\n require(msg.value > 0, \"must_stake_greater_than_0\");\n uint256 tax = msg.value.mul(stakingPoolTax) / 100;\n bytes32 stakeId = keccak256(abi.encodePacked(_msgSender(), address(this), address(0), block.timestamp));\n Stake memory stake = Stake({\n amountStaked: msg.value.sub(tax),\n tokenStaked: address(0),\n since: block.timestamp,\n staker: _msgSender(),\n stakeId: stakeId,\n nextWithdrawalTime: block.timestamp.add(withdrawalIntervals)\n });\n stakes[stakeId] = stake;\n bytes32[] storage stakez = poolsByAddresses[_msgSender()];\n stakez.push(stakeId);\n stakeIDs.push(stakeId);\n withdrawable = withdrawable.add(tax);\n emit Staked(msg.value, address(0), stake.since, _msgSender(), stakeId);\n }\n\n function stakeAsset(address token, uint256 amount) external whenNotPaused nonReentrant {\n require(token.isContract(), \"must_be_contract_address\");\n require(token == tokenA, \"cannot_stake_this_token\");\n require(!blockedAddresses[_msgSender()], \"blocked\");\n require(amount > 0, \"must_stake_greater_than_0\");\n uint256 tax = amount.mul(stakingPoolTax) / 100;\n require(IERC20(token).allowance(_msgSender(), address(this)) >= amount, \"not_enough_allowance\");\n TransferHelpers._safeTransferFromERC20(token, _msgSender(), address(this), amount);\n bytes32 stakeId = keccak256(abi.encodePacked(_msgSender(), address(this), token, block.timestamp));\n Stake memory stake = Stake({\n amountStaked: amount.sub(tax),\n tokenStaked: token,\n since: block.timestamp,\n staker: _msgSender(),\n stakeId: stakeId,\n nextWithdrawalTime: block.timestamp.add(withdrawalIntervals)\n });\n stakes[stakeId] = stake;\n bytes32[] storage stakez = poolsByAddresses[_msgSender()];\n stakez.push(stakeId);\n stakeIDs.push(stakeId);\n nonWithdrawableERC20[token] = nonWithdrawableERC20[token].add(stake.amountStaked);\n emit Staked(amount, token, stake.since, _msgSender(), stakeId);\n }\n\n function unstakeAmount(bytes32 stakeId, uint256 amount) external whenNotPaused nonReentrant {\n Stake storage stake = stakes[stakeId];\n require(_msgSender() == stake.staker, \"not_owner\");\n if (stake.tokenStaked == address(0)) {\n TransferHelpers._safeTransferEther(_msgSender(), amount);\n } else {\n TransferHelpers._safeTransferERC20(stake.tokenStaked, _msgSender(), amount);\n nonWithdrawableERC20[stake.tokenStaked] = nonWithdrawableERC20[stake.tokenStaked].sub(amount);\n }\n\n stake.amountStaked = stake.amountStaked.sub(amount);\n emit Unstaked(amount, stakeId);\n }\n\n function unstakeAll(bytes32 stakeId) external whenNotPaused nonReentrant {\n Stake memory stake = stakes[stakeId];\n require(_msgSender() == stake.staker, \"not_owner\");\n if (stake.tokenStaked == address(0)) {\n TransferHelpers._safeTransferEther(_msgSender(), stake.amountStaked);\n } else {\n TransferHelpers._safeTransferERC20(stake.tokenStaked, _msgSender(), stake.amountStaked);\n nonWithdrawableERC20[stake.tokenStaked] = nonWithdrawableERC20[stake.tokenStaked].sub(stake.amountStaked);\n }\n delete stakes[stakeId];\n\n bytes32[] storage stakez = poolsByAddresses[_msgSender()];\n\n for (uint256 i = 0; i < stakez.length; i++) {\n if (stakez[i] == stakeId) {\n stakez[i] = bytes32(0);\n }\n }\n emit Unstaked(stake.amountStaked, stakeId);\n }\n\n function withdrawRewards(bytes32 stakeId) external whenNotPaused nonReentrant {\n Stake storage stake = stakes[stakeId];\n require(_msgSender() == stake.staker, \"not_owner\");\n require(block.timestamp >= stake.nextWithdrawalTime, \"cannot_withdraw_now\");\n uint256 reward = calculateReward(stakeId);\n address token = stake.tokenStaked == tokenA ? tokenB : tokenA;\n uint256 amount = stake.amountStaked.add(reward);\n\n if (token == tokenB) IvToken(token).mint(_msgSender(), amount);\n else {\n if (tokenA == address(0)) TransferHelpers._safeTransferEther(_msgSender(), amount);\n else TransferHelpers._safeTransferERC20(token, _msgSender(), amount);\n }\n\n stake.since = block.timestamp;\n stake.nextWithdrawalTime = block.timestamp.add(withdrawalIntervals);\n emit Withdrawn(amount, stakeId);\n }\n\n function retrieveEther(address to) external onlyOwner {\n TransferHelpers._safeTransferEther(to, withdrawable);\n withdrawable = 0;\n }\n\n function setStakingPoolTax(uint8 poolTax) external onlyOwner {\n stakingPoolTax = poolTax;\n }\n\n function retrieveERC20(\n address token,\n address to,\n uint256 amount\n ) external onlyOwner {\n require(token.isContract(), \"must_be_contract_address\");\n uint256 bal = IERC20(token).balanceOf(address(this));\n require(bal > nonWithdrawableERC20[token], \"balance_lower_than_staked\");\n\n if (nonWithdrawableERC20[token] > 0) require(bal.sub(amount) < nonWithdrawableERC20[token], \"amount_must_be_less_than_staked\");\n\n TransferHelpers._safeTransferERC20(token, to, amount);\n }\n\n function pause() external {\n require(hasRole(pauserRole, _msgSender()), \"only_pauser\");\n _pause();\n }\n\n function unpause() external {\n require(hasRole(pauserRole, _msgSender()), \"only_pauser\");\n _unpause();\n }\n\n function setTokenAAPY(uint8 aAPY) external {\n require(hasRole(apySetterRole, _msgSender()), \"only_apy_setter\");\n tokenAAPY = aAPY;\n }\n\n function setTokenBAPY(uint8 bAPY) external {\n require(hasRole(apySetterRole, _msgSender()), \"only_apy_setter\");\n tokenBAPY = bAPY;\n }\n\n function setAPYSetter(address account) external onlyOwner {\n require(!hasRole(apySetterRole, account), \"already_apy_setter\");\n _grantRole(apySetterRole, account);\n }\n\n function removeAPYSetter(address account) external onlyOwner {\n require(hasRole(apySetterRole, account), \"not_apy_setter\");\n _revokeRole(apySetterRole, account);\n }\n\n function setWithdrawalIntervals(uint256 intervals) external onlyOwner {\n withdrawalIntervals = intervals;\n }\n\n function setPauser(address account) external onlyOwner {\n require(!hasRole(pauserRole, account), \"already_pauser\");\n _grantRole(pauserRole, account);\n }\n\n function removePauser(address account) external onlyOwner {\n require(hasRole(pauserRole, account), \"not_pauser\");\n _revokeRole(pauserRole, account);\n }\n\n receive() external payable {\n withdrawable = withdrawable.add(msg.value);\n }\n}\n"
},
"contracts/PrivateTokenSaleCreator.sol": {
"content": "pragma solidity ^0.8.0;\n\nimport \"@openzeppelin/contracts/security/ReentrancyGuard.sol\";\nimport \"@openzeppelin/contracts/security/Pausable.sol\";\nimport \"@openzeppelin/contracts/access/Ownable.sol\";\nimport \"@openzeppelin/contracts/access/AccessControl.sol\";\nimport \"@openzeppelin/contracts/utils/Address.sol\";\nimport \"@openzeppelin/contracts/utils/math/SafeMath.sol\";\nimport \"@openzeppelin/contracts/token/ERC20/IERC20.sol\";\nimport \"./interfaces/IPrivateTokenSaleCreator.sol\";\nimport \"./helpers/TransferHelper.sol\";\n\ncontract PrivateTokenSaleCreator is ReentrancyGuard, Pausable, Ownable, AccessControl, IPrivateTokenSaleCreator {\n using Address for address;\n using SafeMath for uint256;\n\n bytes32[] public allTokenSales;\n bytes32 public pauserRole = keccak256(abi.encodePacked(\"PAUSER_ROLE\"));\n bytes32 public withdrawerRole = keccak256(abi.encodePacked(\"WITHDRAWER_ROLE\"));\n bytes32 public finalizerRole = keccak256(abi.encodePacked(\"FINALIZER_ROLE\"));\n uint256 public withdrawable;\n\n uint8 public feePercentage;\n uint256 public saleCreationFee;\n\n mapping(bytes32 => TokenSaleItem) private tokenSales;\n mapping(bytes32 => uint256) private totalEtherRaised;\n mapping(bytes32 => mapping(address => bool)) private isNotAllowedToContribute;\n mapping(bytes32 => mapping(address => uint256)) public amountContributed;\n mapping(bytes32 => mapping(address => uint256)) public balance;\n mapping(bytes32 => address[]) public whitelists;\n\n modifier whenParamsSatisfied(bytes32 saleId) {\n TokenSaleItem memory tokenSale = tokenSales[saleId];\n require(!tokenSale.interrupted, \"token_sale_paused\");\n require(block.timestamp >= tokenSale.saleStartTime, \"token_sale_not_started_yet\");\n require(!tokenSale.ended, \"token_sale_has_ended\");\n require(!isNotAllowedToContribute[saleId][_msgSender()], \"you_are_not_allowed_to_participate_in_this_sale\");\n require(indexOfList(whitelists[saleId], _msgSender()) > uint256(int256(-1)), \"only_whitelisted_addresses_can_partake_in_this_sale\");\n require(totalEtherRaised[saleId] < tokenSale.hardCap, \"hardcap_reached\");\n _;\n }\n\n constructor(uint8 _feePercentage, uint256 _saleCreationFee) {\n _grantRole(pauserRole, _msgSender());\n _grantRole(withdrawerRole, _msgSender());\n _grantRole(finalizerRole, _msgSender());\n feePercentage = _feePercentage;\n saleCreationFee = _saleCreationFee;\n }\n\n function initTokenSale(\n address token,\n uint256 tokensForSale,\n uint256 hardCap,\n uint256 softCap,\n uint256 presaleRate,\n uint256 minContributionEther,\n uint256 maxContributionEther,\n uint256 saleStartTime,\n uint256 daysToLast,\n address proceedsTo,\n address admin,\n address[] memory whiteList\n ) external payable whenNotPaused nonReentrant returns (bytes32 saleId) {\n {\n require(msg.value >= saleCreationFee, \"fee\");\n require(token.isContract(), \"must_be_contract_address\");\n require(saleStartTime > block.timestamp && saleStartTime.sub(block.timestamp) >= 24 hours, \"sale_must_begin_in_at_least_24_hours\");\n require(IERC20(token).allowance(_msgSender(), address(this)) >= tokensForSale, \"not_enough_allowance_given\");\n TransferHelpers._safeTransferFromERC20(token, _msgSender(), address(this), tokensForSale);\n }\n saleId = keccak256(\n abi.encodePacked(\n token,\n _msgSender(),\n block.timestamp,\n tokensForSale,\n hardCap,\n softCap,\n presaleRate,\n minContributionEther,\n maxContributionEther,\n saleStartTime,\n daysToLast,\n proceedsTo\n )\n );\n // Added to prevent 'stack too deep' error\n uint256 endTime;\n {\n endTime = saleStartTime.add(daysToLast.mul(1 days));\n tokenSales[saleId] = TokenSaleItem(\n token,\n tokensForSale,\n hardCap,\n softCap,\n presaleRate,\n saleId,\n minContributionEther,\n maxContributionEther,\n saleStartTime,\n endTime,\n false,\n proceedsTo,\n admin,\n tokensForSale,\n false\n );\n }\n allTokenSales.push(saleId);\n whitelists[saleId] = whiteList;\n withdrawable = msg.value;\n emit TokenSaleItemCreated(\n saleId,\n token,\n tokensForSale,\n hardCap,\n softCap,\n presaleRate,\n minContributionEther,\n maxContributionEther,\n saleStartTime,\n endTime,\n proceedsTo,\n admin\n );\n }\n\n function contribute(bytes32 saleId) external payable whenNotPaused nonReentrant whenParamsSatisfied(saleId) {\n TokenSaleItem storage tokenSaleItem = tokenSales[saleId];\n require(\n msg.value >= tokenSaleItem.minContributionEther && msg.value <= tokenSaleItem.maxContributionEther,\n \"contribution_must_be_within_min_and_max_range\"\n );\n uint256 val = tokenSaleItem.presaleRate.mul(msg.value).div(1 ether);\n require(tokenSaleItem.availableTokens >= val, \"tokens_available_for_sale_is_less\");\n balance[saleId][_msgSender()] = balance[saleId][_msgSender()].add(val);\n amountContributed[saleId][_msgSender()] = amountContributed[saleId][_msgSender()].add(msg.value);\n totalEtherRaised[saleId] = totalEtherRaised[saleId].add(msg.value);\n tokenSaleItem.availableTokens = tokenSaleItem.availableTokens.sub(val);\n }\n\n function normalWithdrawal(bytes32 saleId) external whenNotPaused nonReentrant {\n TokenSaleItem storage tokenSaleItem = tokenSales[saleId];\n require(tokenSaleItem.ended || block.timestamp >= tokenSaleItem.saleEndTime, \"sale_has_not_ended\");\n TransferHelpers._safeTransferERC20(tokenSaleItem.token, _msgSender(), balance[saleId][_msgSender()]);\n delete balance[saleId][_msgSender()];\n }\n\n function emergencyWithdrawal(bytes32 saleId) external nonReentrant {\n TokenSaleItem storage tokenSaleItem = tokenSales[saleId];\n require(!tokenSaleItem.ended, \"sale_has_already_ended\");\n TransferHelpers._safeTransferEther(_msgSender(), amountContributed[saleId][_msgSender()]);\n tokenSaleItem.availableTokens = tokenSaleItem.availableTokens.add(balance[saleId][_msgSender()]);\n totalEtherRaised[saleId] = totalEtherRaised[saleId].sub(amountContributed[saleId][_msgSender()]);\n delete balance[saleId][_msgSender()];\n delete amountContributed[saleId][_msgSender()];\n }\n\n function interruptTokenSale(bytes32 saleId) external whenNotPaused onlyOwner {\n TokenSaleItem storage tokenSale = tokenSales[saleId];\n require(!tokenSale.ended, \"token_sale_has_ended\");\n tokenSale.interrupted = true;\n }\n\n function uninterruptTokenSale(bytes32 saleId) external whenNotPaused onlyOwner {\n TokenSaleItem storage tokenSale = tokenSales[saleId];\n tokenSale.interrupted = false;\n }\n\n function finalizeTokenSale(bytes32 saleId) external whenNotPaused {\n TokenSaleItem storage tokenSale = tokenSales[saleId];\n require(hasRole(finalizerRole, _msgSender()) || tokenSale.admin == _msgSender(), \"only_finalizer_or_admin\");\n require(!tokenSale.ended, \"sale_has_ended\");\n uint256 launchpadProfit = (totalEtherRaised[saleId] * feePercentage).div(100);\n TransferHelpers._safeTransferEther(tokenSale.proceedsTo, totalEtherRaised[saleId].sub(launchpadProfit));\n withdrawable = withdrawable.add(launchpadProfit);\n\n if (tokenSale.availableTokens > 0) {\n TransferHelpers._safeTransferERC20(tokenSale.token, tokenSale.proceedsTo, tokenSale.availableTokens);\n }\n\n tokenSale.ended = true;\n }\n\n function barFromParticiption(bytes32 saleId, address account) external {\n TokenSaleItem memory tokenSale = tokenSales[saleId];\n require(tokenSale.admin == _msgSender(), \"only_admin\");\n require(!tokenSale.ended, \"sale_has_ended\");\n require(!isNotAllowedToContribute[saleId][account], \"already_barred\");\n isNotAllowedToContribute[saleId][account] = true;\n }\n\n function rescindBar(bytes32 saleId, address account) external {\n TokenSaleItem memory tokenSale = tokenSales[saleId];\n require(tokenSale.admin == _msgSender(), \"only_admin\");\n require(!tokenSale.ended, \"sale_has_ended\");\n require(isNotAllowedToContribute[saleId][account], \"not_barred\");\n isNotAllowedToContribute[saleId][account] = false;\n }\n\n function whitelist(bytes32 saleId) public view returns (address[] memory list) {\n list = whitelists[saleId];\n }\n\n function addToWhitelist(bytes32 saleId, address[] memory list) external {\n TokenSaleItem memory tokenSale = tokenSales[saleId];\n require(tokenSale.admin == _msgSender(), \"only_admin\");\n\n address[] storage l = whitelists[saleId];\n\n for (uint256 i = 0; i < list.length; i++) {\n if (indexOfList(l, list[i]) == uint256(int256(-1))) {\n l.push(list[i]);\n }\n }\n }\n\n function removeFromWhiteList(bytes32 saleId, address[] memory list) external {\n TokenSaleItem memory tokenSale = tokenSales[saleId];\n require(tokenSale.admin == _msgSender(), \"only_admin\");\n\n address[] storage l = whitelists[saleId];\n\n for (uint256 i = 0; i < list.length; i++) {\n uint256 index = indexOfList(l, list[i]);\n if (index > uint256(int256(-1))) {\n delete l[index];\n }\n }\n }\n\n function indexOfList(address[] memory list, address item) internal pure returns (uint256 index) {\n index = uint256(int256(-1));\n\n for (uint256 i = 0; i < list.length; i++) {\n if (list[i] == item) {\n index = i;\n }\n }\n }\n\n function pause() external whenNotPaused {\n require(hasRole(pauserRole, _msgSender()), \"must_have_pauser_role\");\n _pause();\n }\n\n function unpause() external whenPaused {\n require(hasRole(pauserRole, _msgSender()), \"must_have_pauser_role\");\n _unpause();\n }\n\n function getTotalEtherRaisedForSale(bytes32 saleId) external view returns (uint256) {\n return totalEtherRaised[saleId];\n }\n\n function getExpectedEtherRaiseForSale(bytes32 saleId) external view returns (uint256) {\n TokenSaleItem memory tokenSaleItem = tokenSales[saleId];\n return tokenSaleItem.hardCap;\n }\n\n function getSoftCap(bytes32 saleId) external view returns (uint256) {\n TokenSaleItem memory tokenSaleItem = tokenSales[saleId];\n return tokenSaleItem.softCap;\n }\n\n function withdrawProfit(address to) external {\n require(hasRole(withdrawerRole, _msgSender()), \"only_withdrawer\");\n TransferHelpers._safeTransferEther(to, withdrawable);\n withdrawable = 0;\n }\n\n function setFeePercentage(uint8 _feePercentage) external onlyOwner {\n feePercentage = _feePercentage;\n }\n\n function setSaleCreationFee(uint256 _saleCreationFee) external onlyOwner {\n saleCreationFee = _saleCreationFee;\n }\n\n receive() external payable {\n withdrawable = withdrawable.add(msg.value);\n }\n}\n"
},
"contracts/interfaces/IPrivateTokenSaleCreator.sol": {
"content": "pragma solidity ^0.8.0;\n\ninterface IPrivateTokenSaleCreator {\n struct TokenSaleItem {\n address token;\n uint256 tokensForSale;\n uint256 hardCap;\n uint256 softCap;\n uint256 presaleRate;\n bytes32 saleId;\n uint256 minContributionEther;\n uint256 maxContributionEther;\n uint256 saleStartTime;\n uint256 saleEndTime;\n bool interrupted;\n address proceedsTo;\n address admin;\n uint256 availableTokens;\n bool ended;\n }\n\n event TokenSaleItemCreated(\n bytes32 saleId,\n address token,\n uint256 tokensForSale,\n uint256 hardCap,\n uint256 softCap,\n uint256 presaleRate,\n uint256 minContributionEther,\n uint256 maxContributionEther,\n uint256 saleStartTime,\n uint256 saleEndTime,\n address proceedsTo,\n address admin\n );\n\n function initTokenSale(\n address token,\n uint256 tokensForSale,\n uint256 hardCap,\n uint256 softCap,\n uint256 presaleRate,\n uint256 minContributionEther,\n uint256 maxContributionEther,\n uint256 saleStartTime,\n uint256 daysToLast,\n address proceedsTo,\n address admin,\n address[] memory whitelist\n ) external payable returns (bytes32 saleId);\n\n function interruptTokenSale(bytes32 saleId) external;\n\n function allTokenSales(uint256) external view returns (bytes32);\n\n function feePercentage() external view returns (uint8);\n\n function balance(bytes32 saleId, address account) external view returns (uint256);\n\n function amountContributed(bytes32 saleId, address account) external view returns (uint256);\n\n function whitelist(bytes32) external view returns (address[] memory);\n}\n"
},
"contracts/test/TestERC20.sol": {
"content": "pragma solidity ^0.8.0;\n\nimport \"@openzeppelin/contracts/token/ERC20/ERC20.sol\";\n\ncontract TestERC20 is ERC20 {\n constructor(uint256 _totalSupply) ERC20(\"Test Token\", \"TT\") {\n _mint(_msgSender(), _totalSupply);\n }\n}\n"
}
},
"settings": {
"optimizer": {
"enabled": true,
"runs": 200
},
"outputSelection": {
"*": {
"*": [
"evm.bytecode",
"evm.deployedBytecode",
"abi"
]
}
}
}
} |