false
true
0

Contract Address Details

0x942B66d74530E67d87188188752c97F96A2EcaD8

Contract Name
AirDrop
Creator
0x0f1358–2d1162 at 0xc3f00b–73882b
Balance
0 KRD
Tokens
Fetching tokens...
Transactions
40 Transactions
Transfers
0 Transfers
Gas Used
211,222,523
Last Balance Update
9668131
Warning! Contract bytecode has been changed and doesn't match the verified one. Therefore, interaction with this smart contract may be risky.
Contract name:
AirDrop




Optimization enabled
true
Compiler version
v0.7.6+commit.7338295f




Optimization runs
99999
EVM Version
default




Verified at
2024-10-22T02:05:53.532153Z

Contract source code

// SPDX-License-Identifier: GPL-3.0-or-later
// Includes openzeppelin (https://github.com/OpenZeppelin/openzeppelin-contracts/) code with MIT license

// File: @openzeppelin/contracts/GSN/Context.sol

pragma solidity >=0.6.0 <0.8.0;

/*
 * @dev Provides information about the current execution context, including the
 * sender of the transaction and its data. While these are generally available
 * via msg.sender and msg.data, they should not be accessed in such a direct
 * manner, since when dealing with GSN meta-transactions the account sending and
 * paying for execution may not be the actual sender (as far as an application
 * is concerned).
 *
 * This contract is only required for intermediate, library-like contracts.
 */
abstract contract Context {
    function _msgSender() internal view virtual returns (address payable) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes memory) {
        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691
        return msg.data;
    }
}

// File: @openzeppelin/contracts/utils/Pausable.sol

/**
 * @dev Contract module which allows children to implement an emergency stop
 * mechanism that can be triggered by an authorized account.
 *
 * This module is used through inheritance. It will make available the
 * modifiers `whenNotPaused` and `whenPaused`, which can be applied to
 * the functions of your contract. Note that they will not be pausable by
 * simply including this module, only once the modifiers are put in place.
 */
abstract contract Pausable is Context {
    /**
     * @dev Emitted when the pause is triggered by `account`.
     */
    event Paused(address account);

    /**
     * @dev Emitted when the pause is lifted by `account`.
     */
    event Unpaused(address account);

    bool private _paused;

    /**
     * @dev Initializes the contract in unpaused state.
     */
    constructor() internal {
        _paused = false;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view returns (bool) {
        return _paused;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is not paused.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    modifier whenNotPaused() {
        require(!_paused, "Pausable: paused");
        _;
    }

    /**
     * @dev Modifier to make a function callable only when the contract is paused.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    modifier whenPaused() {
        require(_paused, "Pausable: not paused");
        _;
    }

    /**
     * @dev Triggers stopped state.
     *
     * Requirements:
     *
     * - The contract must not be paused.
     */
    function _pause() internal virtual whenNotPaused {
        _paused = true;
        emit Paused(_msgSender());
    }

    /**
     * @dev Returns to normal state.
     *
     * Requirements:
     *
     * - The contract must be paused.
     */
    function _unpause() internal virtual whenPaused {
        _paused = false;
        emit Unpaused(_msgSender());
    }
}

// File: @openzeppelin/contracts/token/ERC20/IERC20.sol

/**
 * @dev Interface of the ERC20 standard as defined in the EIP.
 */
interface IERC20 {
    /**
     * @dev Returns the amount of tokens in existence.
     */
    function totalSupply() external view returns (uint256);

    /**
     * @dev Returns the amount of tokens owned by `account`.
     */
    function balanceOf(address account) external view returns (uint256);

    /**
     * @dev Moves `amount` tokens from the caller's account to `recipient`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address recipient, uint256 amount)
        external
        returns (bool);

    /**
     * @dev Returns the remaining number of tokens that `spender` will be
     * allowed to spend on behalf of `owner` through {transferFrom}. This is
     * zero by default.
     *
     * This value changes when {approve} or {transferFrom} are called.
     */
    function allowance(address owner, address spender)
        external
        view
        returns (uint256);

    /**
     * @dev Sets `amount` as the allowance of `spender` over the caller's tokens.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * IMPORTANT: Beware that changing an allowance with this method brings the risk
     * that someone may use both the old and the new allowance by unfortunate
     * transaction ordering. One possible solution to mitigate this race
     * condition is to first reduce the spender's allowance to 0 and set the
     * desired value afterwards:
     * https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
     *
     * Emits an {Approval} event.
     */
    function approve(address spender, uint256 amount) external returns (bool);

    /**
     * @dev Moves `amount` tokens from `sender` to `recipient` using the
     * allowance mechanism. `amount` is then deducted from the caller's
     * allowance.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transferFrom(
        address sender,
        address recipient,
        uint256 amount
    ) external returns (bool);

    /**
     * @dev Emitted when `value` tokens are moved from one account (`from`) to
     * another (`to`).
     *
     * Note that `value` may be zero.
     */
    event Transfer(address indexed from, address indexed to, uint256 value);

    /**
     * @dev Emitted when the allowance of a `spender` for an `owner` is set by
     * a call to {approve}. `value` is the new allowance.
     */
    event Approval(
        address indexed owner,
        address indexed spender,
        uint256 value
    );
}

// File: @openzeppelin/contracts/math/SafeMath.sol

/**
 * @dev Wrappers over Solidity's arithmetic operations with added overflow
 * checks.
 *
 * Arithmetic operations in Solidity wrap on overflow. This can easily result
 * in bugs, because programmers usually assume that an overflow raises an
 * error, which is the standard behavior in high level programming languages.
 * `SafeMath` restores this intuition by reverting the transaction when an
 * operation overflows.
 *
 * Using this library instead of the unchecked operations eliminates an entire
 * class of bugs, so it's recommended to use it always.
 */
library SafeMath {
    /**
     * @dev Returns the addition of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `+` operator.
     *
     * Requirements:
     *
     * - Addition cannot overflow.
     */
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");

        return c;
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }

    /**
     * @dev Returns the subtraction of two unsigned integers, reverting with custom message on
     * overflow (when the result is negative).
     *
     * Counterpart to Solidity's `-` operator.
     *
     * Requirements:
     *
     * - Subtraction cannot overflow.
     */
    function sub(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;

        return c;
    }

    /**
     * @dev Returns the multiplication of two unsigned integers, reverting on
     * overflow.
     *
     * Counterpart to Solidity's `*` operator.
     *
     * Requirements:
     *
     * - Multiplication cannot overflow.
     */
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        // Gas optimization: this is cheaper than requiring 'a' not being zero, but the
        // benefit is lost if 'b' is also tested.
        // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
        if (a == 0) {
            return 0;
        }

        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");

        return c;
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }

    /**
     * @dev Returns the integer division of two unsigned integers. Reverts with custom message on
     * division by zero. The result is rounded towards zero.
     *
     * Counterpart to Solidity's `/` operator. Note: this function uses a
     * `revert` opcode (which leaves remaining gas untouched) while Solidity
     * uses an invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function div(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        // assert(a == b * c + a % b); // There is no case in which this doesn't hold

        return c;
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(uint256 a, uint256 b) internal pure returns (uint256) {
        return mod(a, b, "SafeMath: modulo by zero");
    }

    /**
     * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo),
     * Reverts with custom message when dividing by zero.
     *
     * Counterpart to Solidity's `%` operator. This function uses a `revert`
     * opcode (which leaves remaining gas untouched) while Solidity uses an
     * invalid opcode to revert (consuming all remaining gas).
     *
     * Requirements:
     *
     * - The divisor cannot be zero.
     */
    function mod(
        uint256 a,
        uint256 b,
        string memory errorMessage
    ) internal pure returns (uint256) {
        require(b != 0, errorMessage);
        return a % b;
    }
}

// File: @openzeppelin/contracts/utils/Address.sol

/**
 * @dev Collection of functions related to the address type
 */
library Address {
    /**
     * @dev Returns true if `account` is a contract.
     *
     * [IMPORTANT]
     * ====
     * It is unsafe to assume that an address for which this function returns
     * false is an externally-owned account (EOA) and not a contract.
     *
     * Among others, `isContract` will return false for the following
     * types of addresses:
     *
     *  - an externally-owned account
     *  - a contract in construction
     *  - an address where a contract will be created
     *  - an address where a contract lived, but was destroyed
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize, which returns 0 for contracts in
        // construction, since the code is only stored at the end of the
        // constructor execution.

        uint256 size;
        // solhint-disable-next-line no-inline-assembly
        assembly {
            size := extcodesize(account)
        }
        return size > 0;
    }

    /**
     * @dev Replacement for Solidity's `transfer`: sends `amount` wei to
     * `recipient`, forwarding all available gas and reverting on errors.
     *
     * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
     * of certain opcodes, possibly making contracts go over the 2300 gas limit
     * imposed by `transfer`, making them unable to receive funds via
     * `transfer`. {sendValue} removes this limitation.
     *
     * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more].
     *
     * IMPORTANT: because control is transferred to `recipient`, care must be
     * taken to not create reentrancy vulnerabilities. Consider using
     * {ReentrancyGuard} or the
     * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
     */
    function sendValue(address payable recipient, uint256 amount) internal {
        require(
            address(this).balance >= amount,
            "Address: insufficient balance"
        );

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        (bool success, ) = recipient.call{value: amount}("");
        require(
            success,
            "Address: unable to send value, recipient may have reverted"
        );
    }

    /**
     * @dev Performs a Solidity function call using a low level `call`. A
     * plain`call` is an unsafe replacement for a function call: use this
     * function instead.
     *
     * If `target` reverts with a revert reason, it is bubbled up by this
     * function (like regular Solidity function calls).
     *
     * Returns the raw returned data. To convert to the expected return value,
     * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
     *
     * Requirements:
     *
     * - `target` must be a contract.
     * - calling `target` with `data` must not revert.
     *
     * _Available since v3.1._
     */
    function functionCall(address target, bytes memory data)
        internal
        returns (bytes memory)
    {
        return functionCall(target, data, "Address: low-level call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
     * `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        return functionCallWithValue(target, data, 0, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but also transferring `value` wei to `target`.
     *
     * Requirements:
     *
     * - the calling contract must have an ETH balance of at least `value`.
     * - the called Solidity function must be `payable`.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value
    ) internal returns (bytes memory) {
        return
            functionCallWithValue(
                target,
                data,
                value,
                "Address: low-level call with value failed"
            );
    }

    /**
     * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
     * with `errorMessage` as a fallback revert reason when `target` reverts.
     *
     * _Available since v3.1._
     */
    function functionCallWithValue(
        address target,
        bytes memory data,
        uint256 value,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(
            address(this).balance >= value,
            "Address: insufficient balance for call"
        );
        require(isContract(target), "Address: call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.call{value: value}(
            data
        );
        return _verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(address target, bytes memory data)
        internal
        view
        returns (bytes memory)
    {
        return
            functionStaticCall(
                target,
                data,
                "Address: low-level static call failed"
            );
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a static call.
     *
     * _Available since v3.3._
     */
    function functionStaticCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal view returns (bytes memory) {
        require(isContract(target), "Address: static call to non-contract");

        // solhint-disable-next-line avoid-low-level-calls
        (bool success, bytes memory returndata) = target.staticcall(data);
        return _verifyCallResult(success, returndata, errorMessage);
    }

    function _verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) private pure returns (bytes memory) {
        if (success) {
            return returndata;
        } else {
            // Look for revert reason and bubble it up if present
            if (returndata.length > 0) {
                // The easiest way to bubble the revert reason is using memory via assembly

                // solhint-disable-next-line no-inline-assembly
                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

// File: @openzeppelin/contracts/token/ERC20/SafeERC20.sol

/**
 * @title SafeERC20
 * @dev Wrappers around ERC20 operations that throw on failure (when the token
 * contract returns false). Tokens that return no value (and instead revert or
 * throw on failure) are also supported, non-reverting calls are assumed to be
 * successful.
 * To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
 * which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
 */
library SafeERC20 {
    using SafeMath for uint256;
    using Address for address;

    function safeTransfer(
        IERC20 token,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(token.transfer.selector, to, value)
        );
    }

    function safeTransferFrom(
        IERC20 token,
        address from,
        address to,
        uint256 value
    ) internal {
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(token.transferFrom.selector, from, to, value)
        );
    }

    /**
     * @dev Deprecated. This function has issues similar to the ones found in
     * {IERC20-approve}, and its usage is discouraged.
     *
     * Whenever possible, use {safeIncreaseAllowance} and
     * {safeDecreaseAllowance} instead.
     */
    function safeApprove(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        // safeApprove should only be called when setting an initial allowance,
        // or when resetting it to zero. To increase and decrease it, use
        // 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
        // solhint-disable-next-line max-line-length
        require(
            (value == 0) || (token.allowance(address(this), spender) == 0),
            "SafeERC20: approve from non-zero to non-zero allowance"
        );
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(token.approve.selector, spender, value)
        );
    }

    function safeIncreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender).add(
            value
        );
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(
                token.approve.selector,
                spender,
                newAllowance
            )
        );
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        uint256 newAllowance = token.allowance(address(this), spender).sub(
            value,
            "SafeERC20: decreased allowance below zero"
        );
        _callOptionalReturn(
            token,
            abi.encodeWithSelector(
                token.approve.selector,
                spender,
                newAllowance
            )
        );
    }

    /**
     * @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
     * on the return value: the return value is optional (but if data is returned, it must not be false).
     * @param token The token targeted by the call.
     * @param data The call data (encoded using abi.encode or one of its variants).
     */
    function _callOptionalReturn(IERC20 token, bytes memory data) private {
        // We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
        // we're implementing it ourselves. We use {Address.functionCall} to perform this call, which verifies that
        // the target address contains contract code and also asserts for success in the low-level call.

        bytes memory returndata = address(token).functionCall(
            data,
            "SafeERC20: low-level call failed"
        );
        if (returndata.length > 0) {
            // Return data is optional
            // solhint-disable-next-line max-line-length
            require(
                abi.decode(returndata, (bool)),
                "SafeERC20: ERC20 operation did not succeed"
            );
        }
    }
}

// File: @openzeppelin/contracts/access/Ownable.sol

/**
 * @dev Contract module which provides a basic access control mechanism, where
 * there is an account (an owner) that can be granted exclusive access to
 * specific functions.
 *
 * By default, the owner account will be the one that deploys the contract. This
 * can later be changed with {transferOwnership}.
 *
 * This module is used through inheritance. It will make available the modifier
 * `onlyOwner`, which can be applied to your functions to restrict their use to
 * the owner.
 */
abstract contract Ownable is Context {
    address private _owner;

    event OwnershipTransferred(
        address indexed previousOwner,
        address indexed newOwner
    );

    /**
     * @dev Initializes the contract setting the deployer as the initial owner.
     */
    constructor() internal {
        address msgSender = _msgSender();
        _owner = msgSender;
        emit OwnershipTransferred(address(0), msgSender);
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        require(_owner == _msgSender(), "Ownable: caller is not the owner");
        _;
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions anymore. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby removing any functionality that is only available to the owner.
     */
    function renounceOwnership() public virtual onlyOwner {
        emit OwnershipTransferred(_owner, address(0));
        _owner = address(0);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Can only be called by the current owner.
     */
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(
            newOwner != address(0),
            "Ownable: new owner is the zero address"
        );
        emit OwnershipTransferred(_owner, newOwner);
        _owner = newOwner;
    }
}

// File: @openzeppelin/contracts/utils/ReentrancyGuard.sol

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor() internal {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and make it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

// File: contracts/Escapable.sol

/*
    Copyright 2016, Jordi Baylina
    Contributor: Adrià Massanet <[email protected]>
    Contributor: Oleg Abrosimov <[email protected]>

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.


*/

/// @dev Creates an escape hatch function that can be called in an
///  emergency that will allow designated addresses to send any ether or tokens
///  held in the contract to an `escapeHatchDestination`
contract Escapable is Ownable, ReentrancyGuard {
    using SafeERC20 for IERC20;

    /// @notice The `escapeHatch()` should only be called as a last resort if a
    /// security issue is uncovered or something unexpected happened
    /// @param _token to transfer, use 0x0 for ether
    function escapeHatch(
        address _token,
        address payable _escapeHatchDestination
    ) external onlyOwner nonReentrant {
        require(_escapeHatchDestination != address(0x0));

        uint256 balance;

        /// @dev Logic for ether
        if (_token == address(0x0)) {
            balance = address(this).balance;
            _escapeHatchDestination.transfer(balance);
            EscapeHatchCalled(_token, balance);
            return;
        }
        // Logic for tokens
        IERC20 token = IERC20(_token);
        balance = token.balanceOf(address(this));
        token.safeTransfer(_escapeHatchDestination, balance);
        emit EscapeHatchCalled(_token, balance);
    }

    event EscapeHatchCalled(address token, uint256 amount);
}

// File: contracts/MultiTransfer.sol

/*
    Copyright 2021, Andre Mosin
    Based on work by: Jordi Baylina, Adrià Massanet, Alon Bukai, Oleg Abrosimov

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.


*/

/// @notice Transfer Ether to multiple addresses
contract MultiTransfer is Pausable {
    using SafeMath for uint256;

    /// @notice Send to multiple addresses using two arrays which
    ///  includes the address and the amount.
    ///  Payable
    /// @param _addresses Array of addresses to send to
    /// @param _amounts Array of amounts to send
    function multiTransfer_OST(
        address payable[] calldata _addresses,
        uint256[] calldata _amounts
    ) external payable whenNotPaused returns (bool) {
        // require(_addresses.length == _amounts.length);
        // require(_addresses.length <= 255);
        uint256 _value = msg.value;
        for (uint8 i; i < _addresses.length; i++) {
            _value = _value.sub(_amounts[i]);

            // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
            /*(success, ) = */
            _addresses[i].call{value: _amounts[i]}("");
            // we do not care. caller should check sending results manually and re-send if needed.
        }
        return true;
    }

    /// @notice Send to two addresses
    ///  Payable
    /// @param _address1 Address to send to
    /// @param _amount1 Amount to send to _address1
    /// @param _address2 Address to send to
    /// @param _amount2 Amount to send to _address2
    function transfer2(
        address payable _address1,
        uint256 _amount1,
        address payable _address2,
        uint256 _amount2
    ) external payable whenNotPaused returns (bool) {
        uint256 _value = msg.value;
        _value = _value.sub(_amount1);
        _value = _value.sub(_amount2);

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        /*(success, ) = */
        _address1.call{value: _amount1}("");

        // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
        /*(success, ) = */
        _address2.call{value: _amount2}("");

        return true;
    }
}

// File: contracts/MultiTransferEqual.sol

/*
    Copyright 2021, Andre Mosin
    Based on work by: Jordi Baylina, Adrià Massanet, Alon Bukai, Oleg Abrosimov

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.


*/

/// @notice Transfer equal Ether amount to multiple addresses
contract MultiTransferEqual is Pausable {
    /// @notice Send equal Ether amount to multiple addresses.
    ///  Payable
    /// @param _addresses Array of addresses to send to
    /// @param _amount Amount to send
    function multiTransferEqual_L1R(
        address payable[] calldata _addresses,
        uint256 _amount
    ) external payable whenNotPaused returns (bool) {
        // assert(_addresses.length <= 255);
        require(_amount <= msg.value / _addresses.length);
        for (uint8 i; i < _addresses.length; i++) {
            // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
            /*(success, ) = */
            _addresses[i].call{value: _amount}("");
            // we do not care. caller should check sending results manually and re-send if needed.
        }
        return true;
    }
}

// File: contracts/MultiTransferToken.sol

/*
    Copyright 2021, Andre Mosin
    Based on work by: Jordi Baylina, Adrià Massanet, Alon Bukai, Oleg Abrosimov

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.


*/

/// @notice Transfer tokens to multiple addresses
contract MultiTransferToken is Pausable {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    /// @notice Send ERC20 tokens to multiple addresses
    ///  using two arrays which includes the address and the amount.
    ///
    /// @param _token The token to send
    /// @param _addresses Array of addresses to send to
    /// @param _amounts Array of token amounts to send
    /// @param _amountSum Sum of the _amounts array to send
    function multiTransferToken_a4A(
        address _token,
        address[] calldata _addresses,
        uint256[] calldata _amounts,
        uint256 _amountSum
    ) external payable whenNotPaused {
        // require(_addresses.length == _amounts.length);
        // require(_addresses.length <= 255);
        IERC20 token = IERC20(_token);
        token.safeTransferFrom(msg.sender, address(this), _amountSum);
        for (uint8 i; i < _addresses.length; i++) {
            _amountSum = _amountSum.sub(_amounts[i]);
            token.transfer(_addresses[i], _amounts[i]);
        }
    }
}

// File: contracts/MultiTransferTokenEqual.sol

/*
    Copyright 2021, Andre Mosin
    Based on work by: Jordi Baylina, Adrià Massanet, Alon Bukai, Oleg Abrosimov

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.


*/

/// @notice Transfer equal tokens amount to multiple addresses
contract MultiTransferTokenEqual is Pausable {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    /// @notice Send equal ERC20 tokens amount to multiple contracts
    ///
    /// @param _token The token to send
    /// @param _addresses Array of addresses to send to
    /// @param _amount Tokens amount to send to each address
    function multiTransferTokenEqual_71p(
        address _token,
        address[] calldata _addresses,
        uint256 _amount
    ) external payable whenNotPaused {
        // assert(_addresses.length <= 255);
        uint256 _amountSum = _amount.mul(_addresses.length);
        IERC20 token = IERC20(_token);
        token.safeTransferFrom(msg.sender, address(this), _amountSum);
        for (uint8 i; i < _addresses.length; i++) {
            token.transfer(_addresses[i], _amount);
        }
    }
}

// File: contracts/MultiTransferTokenEther.sol

/*
    Copyright 2021, Andre Mosin
    Based on work by: Jordi Baylina, Adrià Massanet, Alon Bukai, Oleg Abrosimov

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.


*/

/// @notice Transfer tokens and Ether to multiple addresses in one call
contract MultiTransferTokenEther is Pausable {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    /// @notice Send ERC20 tokens and Ether to multiple addresses
    ///  using three arrays which includes the address and the amounts.
    ///
    /// @param _token The token to send
    /// @param _addresses Array of addresses to send to
    /// @param _amounts Array of token amounts to send
    /// @param _amountsEther Array of Ether amounts to send
    function multiTransferTokenEther(
        address _token,
        address payable[] calldata _addresses,
        uint256[] calldata _amounts,
        uint256 _amountSum,
        uint256[] calldata _amountsEther
    ) external payable whenNotPaused {
        // assert(_addresses.length == _amounts.length);
        // assert(_addresses.length == _amountsEther.length);
        // assert(_addresses.length <= 255);
        uint256 _value = msg.value;
        IERC20 token = IERC20(_token);
        token.safeTransferFrom(msg.sender, address(this), _amountSum);
        // bool success;
        for (uint8 i; i < _addresses.length; i++) {
            _amountSum = _amountSum.sub(_amounts[i]);
            _value = _value.sub(_amountsEther[i]);
            token.transfer(_addresses[i], _amounts[i]);

            // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
            /*(success, ) = */
            _addresses[i].call{value: _amountsEther[i]}("");
            // we do not care. caller should check sending results manually and re-send if needed.
        }
    }
}

// File: contracts/MultiTransferTokenEtherEqual.sol

/*
    Copyright 2021, Andre Mosin
    Based on work by: Jordi Baylina, Adrià Massanet, Alon Bukai, Oleg Abrosimov

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.


*/

/// @notice Transfer equal amounts of tokens and Ether to multiple addresses in one call
contract MultiTransferTokenEtherEqual is Pausable {
    using SafeMath for uint256;
    using SafeERC20 for IERC20;

    /// @notice Send equal ERC20 tokens amount to multiple addresses
    ///
    /// @param _token The token to send
    /// @param _addresses Array of addresses to send to
    /// @param _amount Tokens amount to send to each address
    /// @param _amountEther Ether amount to send
    function multiTransferTokenEtherEqual(
        address _token,
        address payable[] calldata _addresses,
        uint256 _amount,
        uint256 _amountEther
    ) external payable whenNotPaused {
        // assert(_addresses.length <= 255);
        require(_amountEther <= msg.value / _addresses.length);

        uint256 _amountSum = _amount.mul(_addresses.length);
        IERC20 token = IERC20(_token);
        token.safeTransferFrom(msg.sender, address(this), _amountSum);
        for (uint8 i; i < _addresses.length; i++) {
            token.transfer(_addresses[i], _amount);

            // solhint-disable-next-line avoid-low-level-calls, avoid-call-value
            /*(success, ) = */
            _addresses[i].call{value: _amountEther}("");
            // we do not care. caller should check sending results manually and re-send if needed.
        }
    }
}

// File: contracts/AirDrop.sol

/*
    Copyright 2021, Andre Mosin
    Based on work by: Jordi Baylina, Adrià Massanet, Alon Bukai, Oleg Abrosimov

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.


*/

/// @notice `AirDrop` is a contract for sending multiple ETH/ERC20 Tokens to
/// multiple addresses.

contract AirDrop is
    Pausable,
    Escapable,
    MultiTransfer,
    MultiTransferEqual,
    MultiTransferToken,
    MultiTransferTokenEqual,
    MultiTransferTokenEther,
    MultiTransferTokenEtherEqual
{
    /// @dev Emergency stop contract in a case of a critical security flaw discovered
    function emergencyStop() external onlyOwner {
        _pause();
    }

    /// @dev Default payable function to not allow sending to contract;
    receive() external payable {
        revert("Can not accept Ether directly.");
    }

    /// @dev Notice callers if functions that do not exist are called
    fallback() external payable {
        require(msg.data.length == 0);
    }
}
        

Contract ABI

[{"type":"event","name":"EscapeHatchCalled","inputs":[{"type":"address","name":"token","internalType":"address","indexed":false},{"type":"uint256","name":"amount","internalType":"uint256","indexed":false}],"anonymous":false},{"type":"event","name":"OwnershipTransferred","inputs":[{"type":"address","name":"previousOwner","internalType":"address","indexed":true},{"type":"address","name":"newOwner","internalType":"address","indexed":true}],"anonymous":false},{"type":"event","name":"Paused","inputs":[{"type":"address","name":"account","internalType":"address","indexed":false}],"anonymous":false},{"type":"event","name":"Unpaused","inputs":[{"type":"address","name":"account","internalType":"address","indexed":false}],"anonymous":false},{"type":"fallback","stateMutability":"payable"},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"emergencyStop","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"escapeHatch","inputs":[{"type":"address","name":"_token","internalType":"address"},{"type":"address","name":"_escapeHatchDestination","internalType":"address payable"}]},{"type":"function","stateMutability":"payable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"multiTransferEqual_L1R","inputs":[{"type":"address[]","name":"_addresses","internalType":"address payable[]"},{"type":"uint256","name":"_amount","internalType":"uint256"}]},{"type":"function","stateMutability":"payable","outputs":[],"name":"multiTransferTokenEqual_71p","inputs":[{"type":"address","name":"_token","internalType":"address"},{"type":"address[]","name":"_addresses","internalType":"address[]"},{"type":"uint256","name":"_amount","internalType":"uint256"}]},{"type":"function","stateMutability":"payable","outputs":[],"name":"multiTransferTokenEther","inputs":[{"type":"address","name":"_token","internalType":"address"},{"type":"address[]","name":"_addresses","internalType":"address payable[]"},{"type":"uint256[]","name":"_amounts","internalType":"uint256[]"},{"type":"uint256","name":"_amountSum","internalType":"uint256"},{"type":"uint256[]","name":"_amountsEther","internalType":"uint256[]"}]},{"type":"function","stateMutability":"payable","outputs":[],"name":"multiTransferTokenEtherEqual","inputs":[{"type":"address","name":"_token","internalType":"address"},{"type":"address[]","name":"_addresses","internalType":"address payable[]"},{"type":"uint256","name":"_amount","internalType":"uint256"},{"type":"uint256","name":"_amountEther","internalType":"uint256"}]},{"type":"function","stateMutability":"payable","outputs":[],"name":"multiTransferToken_a4A","inputs":[{"type":"address","name":"_token","internalType":"address"},{"type":"address[]","name":"_addresses","internalType":"address[]"},{"type":"uint256[]","name":"_amounts","internalType":"uint256[]"},{"type":"uint256","name":"_amountSum","internalType":"uint256"}]},{"type":"function","stateMutability":"payable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"multiTransfer_OST","inputs":[{"type":"address[]","name":"_addresses","internalType":"address payable[]"},{"type":"uint256[]","name":"_amounts","internalType":"uint256[]"}]},{"type":"function","stateMutability":"view","outputs":[{"type":"address","name":"","internalType":"address"}],"name":"owner","inputs":[]},{"type":"function","stateMutability":"view","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"paused","inputs":[]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"renounceOwnership","inputs":[]},{"type":"function","stateMutability":"payable","outputs":[{"type":"bool","name":"","internalType":"bool"}],"name":"transfer2","inputs":[{"type":"address","name":"_address1","internalType":"address payable"},{"type":"uint256","name":"_amount1","internalType":"uint256"},{"type":"address","name":"_address2","internalType":"address payable"},{"type":"uint256","name":"_amount2","internalType":"uint256"}]},{"type":"function","stateMutability":"nonpayable","outputs":[],"name":"transferOwnership","inputs":[{"type":"address","name":"newOwner","internalType":"address"}]},{"type":"receive","stateMutability":"payable"}]
              

Contract Creation Code

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