ETH Price: $3,383.52 (+0.25%)

Contract

0x56Fe68c6f3a61C19C5b60Dc39e021FF8404c5737
 

Overview

ETH Balance

0.01 ETH

Eth Value

$33.84 (@ $3,383.52/ETH)

Token Holdings

Multichain Info

No addresses found
Transaction Hash
Method
Block
From
To
Stake Tokens207377242024-09-12 23:11:1171 days ago1726182671IN
0x56Fe68c6...8404c5737
0 ETH0.000051172.00779393
Stake Tokens207377152024-09-12 23:09:2371 days ago1726182563IN
0x56Fe68c6...8404c5737
0 ETH0.000051532.02187674
Stake Tokens207022982024-09-08 0:25:4776 days ago1725755147IN
0x56Fe68c6...8404c5737
0 ETH0.00002581.01233469
Stake Tokens206982642024-09-07 10:56:2376 days ago1725706583IN
0x56Fe68c6...8404c5737
0 ETH0.000088833.48508133
Stake Tokens206920342024-09-06 14:04:5977 days ago1725631499IN
0x56Fe68c6...8404c5737
0 ETH0.0007485429.36631228
Stake Tokens206892832024-09-06 4:51:5978 days ago1725598319IN
0x56Fe68c6...8404c5737
0 ETH0.000031721.2442116
Buy With Eth206876252024-09-05 23:18:5978 days ago1725578339IN
0x56Fe68c6...8404c5737
0.0002 ETH0.000073681.1547525
Buy With Eth206852552024-09-05 15:22:5978 days ago1725549779IN
0x56Fe68c6...8404c5737
0.0001 ETH0.000196133.07456976
Buy With Eth206852542024-09-05 15:22:4778 days ago1725549767IN
0x56Fe68c6...8404c5737
0.00543 ETH0.000205473.2202872
Buy With Eth206852512024-09-05 15:22:1178 days ago1725549731IN
0x56Fe68c6...8404c5737
0.22 ETH0.000205793.22525217
Stake Tokens206851692024-09-05 15:05:4778 days ago1725548747IN
0x56Fe68c6...8404c5737
0 ETH0.000156996.15891777
Buy With Eth206851472024-09-05 15:01:1178 days ago1725548471IN
0x56Fe68c6...8404c5737
0.00001 ETH0.000272684.27443238
Stake Tokens206851392024-09-05 14:59:3578 days ago1725548375IN
0x56Fe68c6...8404c5737
0 ETH0.000132925.21480995
Buy With Eth206851312024-09-05 14:57:5978 days ago1725548279IN
0x56Fe68c6...8404c5737
0.0014 ETH0.000265034.15376317
Buy With Eth206851222024-09-05 14:56:1178 days ago1725548171IN
0x56Fe68c6...8404c5737
0.01 ETH0.000263384.12795926
Buy With Eth206851162024-09-05 14:54:5978 days ago1725548099IN
0x56Fe68c6...8404c5737
0.002 ETH0.000250253.92212827
Buy With Eth206851132024-09-05 14:54:2378 days ago1725548063IN
0x56Fe68c6...8404c5737
0.002 ETH0.000254653.99111056
Buy With USDT206851062024-09-05 14:52:5978 days ago1725547979IN
0x56Fe68c6...8404c5737
0 ETH0.000225643.5036175
Buy With Eth206851042024-09-05 14:52:3578 days ago1725547955IN
0x56Fe68c6...8404c5737
0.001 ETH0.0002644.13757481
Buy With Eth206851022024-09-05 14:52:1178 days ago1725547931IN
0x56Fe68c6...8404c5737
0.014 ETH0.000324455.0850659
Buy With Eth206851002024-09-05 14:51:4778 days ago1725547907IN
0x56Fe68c6...8404c5737
0.003 ETH0.000250053.9190508
Buy With Eth206850922024-09-05 14:50:1178 days ago1725547811IN
0x56Fe68c6...8404c5737
0.005 ETH0.000250593.92743898
Buy With Eth206850662024-09-05 14:44:5978 days ago1725547499IN
0x56Fe68c6...8404c5737
0.00999 ETH0.000189142.96438255
Buy With Eth206850482024-09-05 14:41:2378 days ago1725547283IN
0x56Fe68c6...8404c5737
0.06 ETH0.000197393.09366931
Buy With Eth206850152024-09-05 14:34:3578 days ago1725546875IN
0x56Fe68c6...8404c5737
0.003 ETH0.000224783.52290631
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Latest 25 internal transactions (View All)

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Parent Transaction Hash Block From To
206876252024-09-05 23:18:5978 days ago1725578339
0x56Fe68c6...8404c5737
0.0002 ETH
206852552024-09-05 15:22:5978 days ago1725549779
0x56Fe68c6...8404c5737
0.0001 ETH
206852542024-09-05 15:22:4778 days ago1725549767
0x56Fe68c6...8404c5737
0.00543 ETH
206852512024-09-05 15:22:1178 days ago1725549731
0x56Fe68c6...8404c5737
0.22 ETH
206851472024-09-05 15:01:1178 days ago1725548471
0x56Fe68c6...8404c5737
0.00001 ETH
206851312024-09-05 14:57:5978 days ago1725548279
0x56Fe68c6...8404c5737
0.0014 ETH
206851222024-09-05 14:56:1178 days ago1725548171
0x56Fe68c6...8404c5737
0.01 ETH
206851162024-09-05 14:54:5978 days ago1725548099
0x56Fe68c6...8404c5737
0.002 ETH
206851132024-09-05 14:54:2378 days ago1725548063
0x56Fe68c6...8404c5737
0.002 ETH
206851042024-09-05 14:52:3578 days ago1725547955
0x56Fe68c6...8404c5737
0.001 ETH
206851022024-09-05 14:52:1178 days ago1725547931
0x56Fe68c6...8404c5737
0.014 ETH
206851002024-09-05 14:51:4778 days ago1725547907
0x56Fe68c6...8404c5737
0.003 ETH
206850922024-09-05 14:50:1178 days ago1725547811
0x56Fe68c6...8404c5737
0.005 ETH
206850662024-09-05 14:44:5978 days ago1725547499
0x56Fe68c6...8404c5737
0.00999 ETH
206850482024-09-05 14:41:2378 days ago1725547283
0x56Fe68c6...8404c5737
0.06 ETH
206850152024-09-05 14:34:3578 days ago1725546875
0x56Fe68c6...8404c5737
0.003 ETH
206850102024-09-05 14:33:3578 days ago1725546815
0x56Fe68c6...8404c5737
0.0565 ETH
206849782024-09-05 14:27:1178 days ago1725546431
0x56Fe68c6...8404c5737
0.01 ETH
206849622024-09-05 14:23:5978 days ago1725546239
0x56Fe68c6...8404c5737
0.21 ETH
206849332024-09-05 14:18:1178 days ago1725545891
0x56Fe68c6...8404c5737
0.007 ETH
206849322024-09-05 14:17:5978 days ago1725545879
0x56Fe68c6...8404c5737
0.04 ETH
206849222024-09-05 14:15:5978 days ago1725545759
0x56Fe68c6...8404c5737
0.001 ETH
206849072024-09-05 14:12:5978 days ago1725545579
0x56Fe68c6...8404c5737
0.0365 ETH
206848812024-09-05 14:07:4778 days ago1725545267
0x56Fe68c6...8404c5737
0.12 ETH
206848632024-09-05 14:04:1178 days ago1725545051
0x56Fe68c6...8404c5737
0.3 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
BaseDawgzPresale

Compiler Version
v0.8.4+commit.c7e474f2

Optimization Enabled:
Yes with 1 runs

Other Settings:
default evmVersion
File 1 of 8 : BaseDawgzPresale.sol
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.4;

import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/Context.sol";
import "@openzeppelin/contracts/security/Pausable.sol";
import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/ReentrancyGuard.sol";

interface Aggregator {
    function latestRoundData() external view returns (uint80 roundId, int256 answer, uint256 startedAt, uint256 updatedAt, uint80 answeredInRound);
}

contract BaseDawgzPresale is ReentrancyGuard, Ownable, Pausable {
    uint256 public currentPrice = 4790; // .00479
    address public paymentWallet = 0xDbe0af70E5Fd9291C4b6B27B42038f751c5f7934;

    IERC20 public USDTInterface = IERC20(0xdAC17F958D2ee523a2206206994597C13D831ec7); // USDT on Ethereum
    Aggregator public aggregatorInterface = Aggregator(0x5f4eC3Df9cbd43714FE2740f5E3616155c5b8419); // Chainlink on Ethereum ETH / USD

    event TokensBoughtWithEth(address indexed buyer, uint256 ethAmount, uint256 ethPrice, uint256 tokenPrice, uint256 timestamp, bool stake);
    event TokensBoughtWithUsdt(address indexed buyer, uint256 usdtAmount, uint256 tokenPrice, uint256 timestamp, bool stake);
    event StakeTokens(address indexed buyer, uint256 amount, uint256 timestamp);

    function pause() external onlyOwner {
        _pause();
    }

    function unpause() external onlyOwner {
        _unpause();
    }

    function buyWithUSDT(uint256 usdtAmount, bool stake) external whenNotPaused returns (bool) {
        uint256 ourAllowance = USDTInterface.allowance(_msgSender(), address(this));
        require(usdtAmount <= ourAllowance, "Make sure to add enough allowance");
        (bool success, ) = address(USDTInterface).call(
            abi.encodeWithSignature("transferFrom(address,address,uint256)", _msgSender(), paymentWallet, usdtAmount)
        );
        require(success, "Token payment failed");
        emit TokensBoughtWithUsdt(_msgSender(), usdtAmount, currentPrice, block.timestamp, stake);
        return true;
    }

    function buyWithEth(bool stake) external payable whenNotPaused nonReentrant returns (bool) {
        require(msg.value > 0, "No ETH sent");
        sendValue(payable(paymentWallet), msg.value);
        emit TokensBoughtWithEth(_msgSender(), msg.value, getLatestEthPrice(), currentPrice, block.timestamp, stake);
        return true;
    }

    function stakeTokens(uint256 amount) external whenNotPaused returns (bool) {
        emit StakeTokens(_msgSender(), amount, block.timestamp);
        return true;
    }   

    function sendValue(address payable recipient, uint256 amount) internal {
        require(address(this).balance >= amount, "Low balance");
        (bool success, ) = recipient.call{value: amount}("");
        require(success, "ETH Payment failed");
    }

    function changePrice(uint256 _currentPrice) external onlyOwner {
        currentPrice = _currentPrice;
    }

    function changePaymentWallet(address _newPaymentWallet) external onlyOwner {
        paymentWallet = _newPaymentWallet;
    }

    function getLatestEthPrice() public view returns (uint256) {
        (, int256 price, , , ) = aggregatorInterface.latestRoundData();
        price = (price * (10 ** 10));
        return uint256(price);
    }

    function withdrawToken(address tokenContractAddress, uint256 amount) external onlyOwner {
        IERC20 tokenContract = IERC20(tokenContractAddress);
        SafeERC20.safeTransfer(tokenContract, msg.sender, amount);
    }

    function withdrawNative(uint256 amount) external onlyOwner {
        payable(msg.sender).transfer(amount);
    }

    // solhint-disable-next-line no-empty-blocks
    receive() external payable {}
}

File 2 of 8 : Ownable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (access/Ownable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.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() {
        _transferOwnership(_msgSender());
    }

    /**
     * @dev Returns the address of the current owner.
     */
    function owner() public view virtual 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 {
        _transferOwnership(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");
        _transferOwnership(newOwner);
    }

    /**
     * @dev Transfers ownership of the contract to a new account (`newOwner`).
     * Internal function without access restriction.
     */
    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

File 3 of 8 : Pausable.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/Pausable.sol)

pragma solidity ^0.8.0;

import "../utils/Context.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() {
        _paused = false;
    }

    /**
     * @dev Returns true if the contract is paused, and false otherwise.
     */
    function paused() public view virtual 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 4 of 8 : ReentrancyGuard.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (security/ReentrancyGuard.sol)

pragma solidity ^0.8.0;

/**
 * @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() {
        _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 making 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 5 of 8 : IERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (token/ERC20/IERC20.sol)

pragma solidity ^0.8.0;

/**
 * @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 `to`.
     *
     * Returns a boolean value indicating whether the operation succeeded.
     *
     * Emits a {Transfer} event.
     */
    function transfer(address to, 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 `from` to `to` 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 from,
        address to,
        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 6 of 8 : SafeERC20.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (token/ERC20/utils/SafeERC20.sol)

pragma solidity ^0.8.0;

import "../IERC20.sol";
import "../../../utils/Address.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 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'
        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) + value;
        _callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
    }

    function safeDecreaseAllowance(
        IERC20 token,
        address spender,
        uint256 value
    ) internal {
        unchecked {
            uint256 oldAllowance = token.allowance(address(this), spender);
            require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
            uint256 newAllowance = oldAllowance - value;
            _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
            require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
        }
    }
}

File 7 of 8 : Address.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v4.5.0) (utils/Address.sol)

pragma solidity ^0.8.1;

/**
 * @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
     * ====
     *
     * [IMPORTANT]
     * ====
     * You shouldn't rely on `isContract` to protect against flash loan attacks!
     *
     * Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
     * like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
     * constructor.
     * ====
     */
    function isContract(address account) internal view returns (bool) {
        // This method relies on extcodesize/address.code.length, which returns 0
        // for contracts in construction, since the code is only stored at the end
        // of the constructor execution.

        return account.code.length > 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");

        (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");

        (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");

        (bool success, bytes memory returndata) = target.staticcall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
        return functionDelegateCall(target, data, "Address: low-level delegate call failed");
    }

    /**
     * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
     * but performing a delegate call.
     *
     * _Available since v3.4._
     */
    function functionDelegateCall(
        address target,
        bytes memory data,
        string memory errorMessage
    ) internal returns (bytes memory) {
        require(isContract(target), "Address: delegate call to non-contract");

        (bool success, bytes memory returndata) = target.delegatecall(data);
        return verifyCallResult(success, returndata, errorMessage);
    }

    /**
     * @dev Tool to verifies that a low level call was successful, and revert if it wasn't, either by bubbling the
     * revert reason using the provided one.
     *
     * _Available since v4.3._
     */
    function verifyCallResult(
        bool success,
        bytes memory returndata,
        string memory errorMessage
    ) internal 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

                assembly {
                    let returndata_size := mload(returndata)
                    revert(add(32, returndata), returndata_size)
                }
            } else {
                revert(errorMessage);
            }
        }
    }
}

File 8 of 8 : Context.sol
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (utils/Context.sol)

pragma solidity ^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 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) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 1
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.