ETH Price: $2,557.74 (+3.84%)

Contract

0x9B8CC92cee71E789e6A69e5996cEe43FA3bf13AE
 

Overview

ETH Balance

0 ETH

Eth Value

$0.00

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Transaction Hash
Method
Block
From
To
Buy For ETH138347992021-12-19 9:42:20983 days ago1639906940IN
0x9B8CC92c...FA3bf13AE
1.78519754 ETH0.0012830430
Transfer138026812021-12-14 10:12:22988 days ago1639476742IN
0x9B8CC92c...FA3bf13AE
0.02992149 ETH0.000899642.74484011
Buy For ETH136666812021-11-22 20:43:221010 days ago1637613802IN
0x9B8CC92c...FA3bf13AE
2.38754293 ETH0.00434142101.51095439
Buy For ETH136666812021-11-22 20:43:221010 days ago1637613802IN
0x9B8CC92c...FA3bf13AE
2.38754293 ETH0.00434142101.51095439
Multi Unlock Bou...136666472021-11-22 20:37:191010 days ago1637613439IN
0x9B8CC92c...FA3bf13AE
0 ETH0.44562964230.87896054
Multi Unlock Bou...136666452021-11-22 20:36:441010 days ago1637613404IN
0x9B8CC92c...FA3bf13AE
0 ETH0.59843046188.41094414
Multi Unlock Bou...136666432021-11-22 20:36:011010 days ago1637613361IN
0x9B8CC92c...FA3bf13AE
0 ETH0.59190523190.45660681
Multi Unlock Bou...136666332021-11-22 20:34:061010 days ago1637613246IN
0x9B8CC92c...FA3bf13AE
0 ETH0.65912362198.94936644
Multi Unlock Bou...136666322021-11-22 20:33:251010 days ago1637613205IN
0x9B8CC92c...FA3bf13AE
0 ETH0.62022559198.47943162
Multi Unlock Bou...136666312021-11-22 20:33:091010 days ago1637613189IN
0x9B8CC92c...FA3bf13AE
0 ETH0.62614084195.03745855
Multi Unlock Bou...136666282021-11-22 20:32:151010 days ago1637613135IN
0x9B8CC92c...FA3bf13AE
0 ETH0.65228088194.88069577
Multi Unlock Bou...136666252021-11-22 20:31:491010 days ago1637613109IN
0x9B8CC92c...FA3bf13AE
0 ETH0.65412234202.67391146
Multi Unlock Bou...136666202021-11-22 20:30:281010 days ago1637613028IN
0x9B8CC92c...FA3bf13AE
0 ETH0.00979236185.08987327
Multi Unlock Bou...136666182021-11-22 20:29:581010 days ago1637612998IN
0x9B8CC92c...FA3bf13AE
0 ETH0.01005134190.0280595
Set Lock Time136666132021-11-22 20:29:361010 days ago1637612976IN
0x9B8CC92c...FA3bf13AE
0 ETH0.00465599164.99490122
Buy For ETH136664812021-11-22 19:59:151010 days ago1637611155IN
0x9B8CC92c...FA3bf13AE
2.39552132 ETH0.00492649115.19108667
Buy For ETH136664812021-11-22 19:59:151010 days ago1637611155IN
0x9B8CC92c...FA3bf13AE
2.39548783 ETH0.00492649115.19108667
Buy For ETH136664802021-11-22 19:59:041010 days ago1637611144IN
0x9B8CC92c...FA3bf13AE
2.46915061 ETH0.00460348109.02536513
Multi Unlock Bou...136664192021-11-22 19:47:071010 days ago1637610427IN
0x9B8CC92c...FA3bf13AE
0 ETH0.02484133202.18072622
Buy For ETH136663402021-11-22 19:29:001010 days ago1637609340IN
0x9B8CC92c...FA3bf13AE
2.68700714 ETH0.00532035124.40047888
Multi Unlock Bou...136661692021-11-22 18:49:491010 days ago1637606989IN
0x9B8CC92c...FA3bf13AE
0 ETH0.21450374154.01530841
Buy For ETH136659622021-11-22 18:02:311010 days ago1637604151IN
0x9B8CC92c...FA3bf13AE
2.59807056 ETH0.01739685112.47576597
Buy For ERC20136658112021-11-22 17:26:191010 days ago1637601979IN
0x9B8CC92c...FA3bf13AE
0 ETH0.02330727106.51831707
Buy For ETH136657582021-11-22 17:15:251010 days ago1637601325IN
0x9B8CC92c...FA3bf13AE
2.5361603 ETH0.02995727119.79889678
Buy For ETH136656352021-11-22 16:45:311010 days ago1637599531IN
0x9B8CC92c...FA3bf13AE
68.28208966 ETH0.02932137112.56195094
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Parent Transaction Hash Block From To
138347992021-12-19 9:42:20983 days ago1639906940
0x9B8CC92c...FA3bf13AE
1.78519754 ETH
136666812021-11-22 20:43:221010 days ago1637613802
0x9B8CC92c...FA3bf13AE
2.38754293 ETH
136666812021-11-22 20:43:221010 days ago1637613802
0x9B8CC92c...FA3bf13AE
2.38754293 ETH
136664812021-11-22 19:59:151010 days ago1637611155
0x9B8CC92c...FA3bf13AE
2.39552132 ETH
136664812021-11-22 19:59:151010 days ago1637611155
0x9B8CC92c...FA3bf13AE
2.39548783 ETH
136664802021-11-22 19:59:041010 days ago1637611144
0x9B8CC92c...FA3bf13AE
2.46915061 ETH
136663402021-11-22 19:29:001010 days ago1637609340
0x9B8CC92c...FA3bf13AE
2.68700714 ETH
136659622021-11-22 18:02:311010 days ago1637604151
0x9B8CC92c...FA3bf13AE
2.59807056 ETH
136657582021-11-22 17:15:251010 days ago1637601325
0x9B8CC92c...FA3bf13AE
2.5361603 ETH
136656352021-11-22 16:45:311010 days ago1637599531
0x9B8CC92c...FA3bf13AE
68.28208966 ETH
136655942021-11-22 16:36:051010 days ago1637598965
0x9B8CC92c...FA3bf13AE
2.53038316 ETH
136654992021-11-22 16:17:211010 days ago1637597841
0x9B8CC92c...FA3bf13AE
2.57179659 ETH
136650102021-11-22 14:27:081010 days ago1637591228
0x9B8CC92c...FA3bf13AE
1.08801637 ETH
136648802021-11-22 13:54:161010 days ago1637589256
0x9B8CC92c...FA3bf13AE
2.57813774 ETH
136647592021-11-22 13:25:431010 days ago1637587543
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2.66437401 ETH
136646712021-11-22 13:08:531010 days ago1637586533
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2.64798483 ETH
136644832021-11-22 12:25:031010 days ago1637583903
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2.69730994 ETH
136643702021-11-22 11:59:171010 days ago1637582357
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0.01477463 ETH
136643662021-11-22 11:58:011010 days ago1637582281
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2.69504863 ETH
136643602021-11-22 11:56:431010 days ago1637582203
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0.00402888 ETH
136643592021-11-22 11:56:131010 days ago1637582173
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2.66718029 ETH
136643562021-11-22 11:55:411010 days ago1637582141
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2.68077411 ETH
136642952021-11-22 11:39:591010 days ago1637581199
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13.47725673 ETH
136642362021-11-22 11:26:321010 days ago1637580392
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2.67947817 ETH
136642292021-11-22 11:25:231010 days ago1637580323
0x9B8CC92c...FA3bf13AE
2.66197523 ETH
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Contract Source Code Verified (Exact Match)

Contract Name:
BuyNLock

Compiler Version
v0.8.4+commit.c7e474f2

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
File 1 of 10 : BuyNLock.sol
//SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/security/Pausable.sol";
import "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "@openzeppelin/contracts/token/ERC20/utils/SafeERC20.sol";
import "@openzeppelin/contracts/utils/math/SafeCast.sol";
import "@uniswap/v2-periphery/contracts/interfaces/IUniswapV2Router02.sol";

contract BuyNLock is Ownable, Pausable {
    using SafeERC20 for IERC20;
    using SafeCast for uint256;

    uint256 constant MAX_LOCK_TIME = 60 * 60 * 24 * 30; // 30 days
    uint256 constant MAX_UNLOCKS_PER_TX = 500;

    IERC20 public immutable buyingToken;
    uint24 public lockTime;
    IUniswapV2Router02 public immutable uniswapRouter;

    struct Lock {
        uint128 amount;
        uint48 lockedAt;
    }

    struct User {
        uint128 lockedAmountTotal;
        uint128 indexToUnlock;
        Lock[] locks;
    }

    mapping(address => User) public users;

    event LockTimeChange(uint24 oldLockTime, uint24 newLockTime);
    event BuyAndLock(address indexed user, IERC20 indexed sellingToken, uint amountSold, uint amountBought, uint lockedAt);
    event Unlock(address indexed user, uint amountUnlocked, uint numberOfUnlocks);

    constructor(IERC20 _buyingToken, uint24 _lockTime, IUniswapV2Router02 _uniswapRouter) {
        require(address(_buyingToken) != address(0), "Invalid buying token address");
        require(address(_uniswapRouter) != address(0), "Invalid uniswap router address");
        require(_lockTime <= MAX_LOCK_TIME, "Lock time > MAX lock time");

        buyingToken = _buyingToken;
        lockTime = _lockTime;
        uniswapRouter = _uniswapRouter;
    }

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

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

    function setLockTime(uint24 _lockTime) external onlyOwner {
        require(_lockTime <= MAX_LOCK_TIME, "Lock time > MAX lock time");

        emit LockTimeChange(lockTime, _lockTime);
        lockTime = _lockTime;
    }

    function buyForERC20(uint256 amountToSell, uint256 minimumAmountToBuy, address[] calldata swapPath, uint256 swapDeadline) external whenNotPaused {
        require(swapPath.length > 1, "Invalid path length");
        require(swapPath[swapPath.length - 1] == address(buyingToken), "Invalid token out");
        IERC20 sellingToken = IERC20(swapPath[0]);
        require(sellingToken != buyingToken, "selling token == buying token");

        if (sellingToken.allowance(address(this), address(uniswapRouter)) < amountToSell) {
            sellingToken.safeApprove(address(uniswapRouter), 2 ** 256 - 1);
        }

        sellingToken.safeTransferFrom(msg.sender, address(this), amountToSell);

        uint256 buyingTokenBalanceBefore = buyingToken.balanceOf(address(this));
        IUniswapV2Router02(uniswapRouter).swapExactTokensForTokensSupportingFeeOnTransferTokens(
            amountToSell, 
            minimumAmountToBuy, 
            swapPath, 
            address(this), 
            swapDeadline
        );
        uint128 amountBought = (buyingToken.balanceOf(address(this)) - buyingTokenBalanceBefore).toUint128();
        _lockBoughtTokens(amountBought);

        emit BuyAndLock(msg.sender, sellingToken, amountToSell, amountBought, block.timestamp);
    }

    function buyForETH(uint256 minimumAmountToBuy, address[] calldata swapPath, uint256 swapDeadline) external payable whenNotPaused {
        require(swapPath.length > 1, "Invalid path length");
        require(swapPath[swapPath.length - 1] == address(buyingToken), "Invalid token out");
        IERC20 sellingToken = IERC20(swapPath[0]);
        require(sellingToken != buyingToken, "selling token == buying token");

        uint256 buyingTokenBalanceBefore = buyingToken.balanceOf(address(this));
        IUniswapV2Router02(uniswapRouter).swapExactETHForTokensSupportingFeeOnTransferTokens{ value: msg.value }(
            minimumAmountToBuy, 
            swapPath, 
            address(this), 
            swapDeadline
        );
        uint128 amountBought = (buyingToken.balanceOf(address(this)) - buyingTokenBalanceBefore).toUint128();
        _lockBoughtTokens(amountBought);

        emit BuyAndLock(msg.sender, sellingToken, msg.value, amountBought, block.timestamp);
    }

    function unlockBoughtTokens(address userAddress) external {
        (uint128 unlockableAmount, uint128 unlocksCount) = getUnlockableAmount(userAddress);
        require(unlockableAmount > 0, "No unlockable amount");

        _unlockBoughtTokens(userAddress, unlockableAmount, unlocksCount);
    }

    function multiUnlockBoughtTokens(address[] calldata userAddresses) external {
        for (uint256 i = 0; i < userAddresses.length; i++) {
            address userAddress = userAddresses[i];
            (uint128 unlockableAmount, uint128 unlocksCount) = getUnlockableAmount(userAddress);

            if (unlockableAmount > 0) {
                _unlockBoughtTokens(userAddress, unlockableAmount, unlocksCount);
            }
        }
    }

    // INTERNAL 

    function _lockBoughtTokens(uint128 amountBought) internal {
        User storage user = users[msg.sender];
        user.lockedAmountTotal += amountBought;
        user.locks.push(Lock(amountBought, uint48(block.timestamp)));
    }

    function _unlockBoughtTokens(address userAddress, uint128 unlockableAmount, uint128 unlocksCount) internal {
        User storage user = users[userAddress];
        user.indexToUnlock += unlocksCount;
        user.lockedAmountTotal -= unlockableAmount;
        buyingToken.safeTransfer(userAddress, unlockableAmount);
        emit Unlock(userAddress, unlockableAmount, unlocksCount);
    }

    // VIEW

    function getUnlockableAmount(address userAddress) public view returns (uint128, uint128) {
        User storage user = users[userAddress];
        uint128 indexToUnlock = user.indexToUnlock;
        uint128 locksLength = uint128(user.locks.length);
        uint128 unlocksCount = 0;
        uint128 unlockableAmount = 0;
        uint24 _lockTime = lockTime;

        if (_lockTime != 0) {
            while (indexToUnlock + unlocksCount < locksLength && unlocksCount < MAX_UNLOCKS_PER_TX) {
                Lock storage lock = user.locks[indexToUnlock + unlocksCount];
                if (block.timestamp < lock.lockedAt + _lockTime) break;

                unlockableAmount += lock.amount;
                unlocksCount++;
            }
        } else {
            unlockableAmount = user.lockedAmountTotal;
            unlocksCount = locksLength - indexToUnlock;
        }

        return (unlockableAmount, unlocksCount);
    }

    function getLockedAmount(address userAddress) external view returns (uint128) {
        return users[userAddress].lockedAmountTotal;
    }
}

File 2 of 10 : Ownable.sol
// SPDX-License-Identifier: MIT

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() {
        _setOwner(_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 {
        _setOwner(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");
        _setOwner(newOwner);
    }

    function _setOwner(address newOwner) private {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

File 3 of 10 : Pausable.sol
// SPDX-License-Identifier: MIT

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 10 : IERC20.sol
// SPDX-License-Identifier: MIT

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 `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 5 of 10 : SafeERC20.sol
// SPDX-License-Identifier: MIT

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 6 of 10 : SafeCast.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
 * checks.
 *
 * Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
 * easily result in undesired exploitation or bugs, since developers usually
 * assume that overflows raise errors. `SafeCast` restores this intuition by
 * reverting the transaction when such 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.
 *
 * Can be combined with {SafeMath} and {SignedSafeMath} to extend it to smaller types, by performing
 * all math on `uint256` and `int256` and then downcasting.
 */
library SafeCast {
    /**
     * @dev Returns the downcasted uint224 from uint256, reverting on
     * overflow (when the input is greater than largest uint224).
     *
     * Counterpart to Solidity's `uint224` operator.
     *
     * Requirements:
     *
     * - input must fit into 224 bits
     */
    function toUint224(uint256 value) internal pure returns (uint224) {
        require(value <= type(uint224).max, "SafeCast: value doesn't fit in 224 bits");
        return uint224(value);
    }

    /**
     * @dev Returns the downcasted uint128 from uint256, reverting on
     * overflow (when the input is greater than largest uint128).
     *
     * Counterpart to Solidity's `uint128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     */
    function toUint128(uint256 value) internal pure returns (uint128) {
        require(value <= type(uint128).max, "SafeCast: value doesn't fit in 128 bits");
        return uint128(value);
    }

    /**
     * @dev Returns the downcasted uint96 from uint256, reverting on
     * overflow (when the input is greater than largest uint96).
     *
     * Counterpart to Solidity's `uint96` operator.
     *
     * Requirements:
     *
     * - input must fit into 96 bits
     */
    function toUint96(uint256 value) internal pure returns (uint96) {
        require(value <= type(uint96).max, "SafeCast: value doesn't fit in 96 bits");
        return uint96(value);
    }

    /**
     * @dev Returns the downcasted uint64 from uint256, reverting on
     * overflow (when the input is greater than largest uint64).
     *
     * Counterpart to Solidity's `uint64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     */
    function toUint64(uint256 value) internal pure returns (uint64) {
        require(value <= type(uint64).max, "SafeCast: value doesn't fit in 64 bits");
        return uint64(value);
    }

    /**
     * @dev Returns the downcasted uint32 from uint256, reverting on
     * overflow (when the input is greater than largest uint32).
     *
     * Counterpart to Solidity's `uint32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     */
    function toUint32(uint256 value) internal pure returns (uint32) {
        require(value <= type(uint32).max, "SafeCast: value doesn't fit in 32 bits");
        return uint32(value);
    }

    /**
     * @dev Returns the downcasted uint16 from uint256, reverting on
     * overflow (when the input is greater than largest uint16).
     *
     * Counterpart to Solidity's `uint16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     */
    function toUint16(uint256 value) internal pure returns (uint16) {
        require(value <= type(uint16).max, "SafeCast: value doesn't fit in 16 bits");
        return uint16(value);
    }

    /**
     * @dev Returns the downcasted uint8 from uint256, reverting on
     * overflow (when the input is greater than largest uint8).
     *
     * Counterpart to Solidity's `uint8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits.
     */
    function toUint8(uint256 value) internal pure returns (uint8) {
        require(value <= type(uint8).max, "SafeCast: value doesn't fit in 8 bits");
        return uint8(value);
    }

    /**
     * @dev Converts a signed int256 into an unsigned uint256.
     *
     * Requirements:
     *
     * - input must be greater than or equal to 0.
     */
    function toUint256(int256 value) internal pure returns (uint256) {
        require(value >= 0, "SafeCast: value must be positive");
        return uint256(value);
    }

    /**
     * @dev Returns the downcasted int128 from int256, reverting on
     * overflow (when the input is less than smallest int128 or
     * greater than largest int128).
     *
     * Counterpart to Solidity's `int128` operator.
     *
     * Requirements:
     *
     * - input must fit into 128 bits
     *
     * _Available since v3.1._
     */
    function toInt128(int256 value) internal pure returns (int128) {
        require(value >= type(int128).min && value <= type(int128).max, "SafeCast: value doesn't fit in 128 bits");
        return int128(value);
    }

    /**
     * @dev Returns the downcasted int64 from int256, reverting on
     * overflow (when the input is less than smallest int64 or
     * greater than largest int64).
     *
     * Counterpart to Solidity's `int64` operator.
     *
     * Requirements:
     *
     * - input must fit into 64 bits
     *
     * _Available since v3.1._
     */
    function toInt64(int256 value) internal pure returns (int64) {
        require(value >= type(int64).min && value <= type(int64).max, "SafeCast: value doesn't fit in 64 bits");
        return int64(value);
    }

    /**
     * @dev Returns the downcasted int32 from int256, reverting on
     * overflow (when the input is less than smallest int32 or
     * greater than largest int32).
     *
     * Counterpart to Solidity's `int32` operator.
     *
     * Requirements:
     *
     * - input must fit into 32 bits
     *
     * _Available since v3.1._
     */
    function toInt32(int256 value) internal pure returns (int32) {
        require(value >= type(int32).min && value <= type(int32).max, "SafeCast: value doesn't fit in 32 bits");
        return int32(value);
    }

    /**
     * @dev Returns the downcasted int16 from int256, reverting on
     * overflow (when the input is less than smallest int16 or
     * greater than largest int16).
     *
     * Counterpart to Solidity's `int16` operator.
     *
     * Requirements:
     *
     * - input must fit into 16 bits
     *
     * _Available since v3.1._
     */
    function toInt16(int256 value) internal pure returns (int16) {
        require(value >= type(int16).min && value <= type(int16).max, "SafeCast: value doesn't fit in 16 bits");
        return int16(value);
    }

    /**
     * @dev Returns the downcasted int8 from int256, reverting on
     * overflow (when the input is less than smallest int8 or
     * greater than largest int8).
     *
     * Counterpart to Solidity's `int8` operator.
     *
     * Requirements:
     *
     * - input must fit into 8 bits.
     *
     * _Available since v3.1._
     */
    function toInt8(int256 value) internal pure returns (int8) {
        require(value >= type(int8).min && value <= type(int8).max, "SafeCast: value doesn't fit in 8 bits");
        return int8(value);
    }

    /**
     * @dev Converts an unsigned uint256 into a signed int256.
     *
     * Requirements:
     *
     * - input must be less than or equal to maxInt256.
     */
    function toInt256(uint256 value) internal pure returns (int256) {
        // Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
        require(value <= uint256(type(int256).max), "SafeCast: value doesn't fit in an int256");
        return int256(value);
    }
}

File 7 of 10 : IUniswapV2Router02.sol
pragma solidity >=0.6.2;

import './IUniswapV2Router01.sol';

interface IUniswapV2Router02 is IUniswapV2Router01 {
    function removeLiquidityETHSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountETH);
    function removeLiquidityETHWithPermitSupportingFeeOnTransferTokens(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountETH);

    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
    function swapExactETHForTokensSupportingFeeOnTransferTokens(
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external payable;
    function swapExactTokensForETHSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}

File 8 of 10 : Context.sol
// SPDX-License-Identifier: MIT

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;
    }
}

File 9 of 10 : Address.sol
// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

/**
 * @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;
        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");

        (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 10 of 10 : IUniswapV2Router01.sol
pragma solidity >=0.6.2;

interface IUniswapV2Router01 {
    function factory() external pure returns (address);
    function WETH() external pure returns (address);

    function addLiquidity(
        address tokenA,
        address tokenB,
        uint amountADesired,
        uint amountBDesired,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB, uint liquidity);
    function addLiquidityETH(
        address token,
        uint amountTokenDesired,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external payable returns (uint amountToken, uint amountETH, uint liquidity);
    function removeLiquidity(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETH(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline
    ) external returns (uint amountToken, uint amountETH);
    function removeLiquidityWithPermit(
        address tokenA,
        address tokenB,
        uint liquidity,
        uint amountAMin,
        uint amountBMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountA, uint amountB);
    function removeLiquidityETHWithPermit(
        address token,
        uint liquidity,
        uint amountTokenMin,
        uint amountETHMin,
        address to,
        uint deadline,
        bool approveMax, uint8 v, bytes32 r, bytes32 s
    ) external returns (uint amountToken, uint amountETH);
    function swapExactTokensForTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapTokensForExactTokens(
        uint amountOut,
        uint amountInMax,
        address[] calldata path,
        address to,
        uint deadline
    ) external returns (uint[] memory amounts);
    function swapExactETHForTokens(uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);
    function swapTokensForExactETH(uint amountOut, uint amountInMax, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapExactTokensForETH(uint amountIn, uint amountOutMin, address[] calldata path, address to, uint deadline)
        external
        returns (uint[] memory amounts);
    function swapETHForExactTokens(uint amountOut, address[] calldata path, address to, uint deadline)
        external
        payable
        returns (uint[] memory amounts);

    function quote(uint amountA, uint reserveA, uint reserveB) external pure returns (uint amountB);
    function getAmountOut(uint amountIn, uint reserveIn, uint reserveOut) external pure returns (uint amountOut);
    function getAmountIn(uint amountOut, uint reserveIn, uint reserveOut) external pure returns (uint amountIn);
    function getAmountsOut(uint amountIn, address[] calldata path) external view returns (uint[] memory amounts);
    function getAmountsIn(uint amountOut, address[] calldata path) external view returns (uint[] memory amounts);
}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"contract IERC20","name":"_buyingToken","type":"address"},{"internalType":"uint24","name":"_lockTime","type":"uint24"},{"internalType":"contract IUniswapV2Router02","name":"_uniswapRouter","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"contract IERC20","name":"sellingToken","type":"address"},{"indexed":false,"internalType":"uint256","name":"amountSold","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"amountBought","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"lockedAt","type":"uint256"}],"name":"BuyAndLock","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint24","name":"oldLockTime","type":"uint24"},{"indexed":false,"internalType":"uint24","name":"newLockTime","type":"uint24"}],"name":"LockTimeChange","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Paused","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amountUnlocked","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"numberOfUnlocks","type":"uint256"}],"name":"Unlock","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Unpaused","type":"event"},{"inputs":[{"internalType":"uint256","name":"amountToSell","type":"uint256"},{"internalType":"uint256","name":"minimumAmountToBuy","type":"uint256"},{"internalType":"address[]","name":"swapPath","type":"address[]"},{"internalType":"uint256","name":"swapDeadline","type":"uint256"}],"name":"buyForERC20","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"minimumAmountToBuy","type":"uint256"},{"internalType":"address[]","name":"swapPath","type":"address[]"},{"internalType":"uint256","name":"swapDeadline","type":"uint256"}],"name":"buyForETH","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"buyingToken","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"userAddress","type":"address"}],"name":"getLockedAmount","outputs":[{"internalType":"uint128","name":"","type":"uint128"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"userAddress","type":"address"}],"name":"getUnlockableAmount","outputs":[{"internalType":"uint128","name":"","type":"uint128"},{"internalType":"uint128","name":"","type":"uint128"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"lockTime","outputs":[{"internalType":"uint24","name":"","type":"uint24"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address[]","name":"userAddresses","type":"address[]"}],"name":"multiUnlockBoughtTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint24","name":"_lockTime","type":"uint24"}],"name":"setLockTime","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"uniswapRouter","outputs":[{"internalType":"contract IUniswapV2Router02","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"userAddress","type":"address"}],"name":"unlockBoughtTokens","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"users","outputs":[{"internalType":"uint128","name":"lockedAmountTotal","type":"uint128"},{"internalType":"uint128","name":"indexToUnlock","type":"uint128"}],"stateMutability":"view","type":"function"}]

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

0000000000000000000000000f51bb10119727a7e5ea3538074fb341f56b09ad000000000000000000000000000000000000000000000000000000000013c6800000000000000000000000007a250d5630b4cf539739df2c5dacb4c659f2488d

-----Decoded View---------------
Arg [0] : _buyingToken (address): 0x0f51bb10119727a7e5eA3538074fb341F56B09Ad
Arg [1] : _lockTime (uint24): 1296000
Arg [2] : _uniswapRouter (address): 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D

-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 0000000000000000000000000f51bb10119727a7e5ea3538074fb341f56b09ad
Arg [1] : 000000000000000000000000000000000000000000000000000000000013c680
Arg [2] : 0000000000000000000000007a250d5630b4cf539739df2c5dacb4c659f2488d


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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.