Contract 0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e2

 

Contract Overview

Balance:
0 MATIC

MATIC Value:
$0.00

Token:
Txn Hash Method
Block
From
To
Value [Txn Fee]
0x0644a3de3505c0e278381a27974c66a62d35bfa1b96f3dc69f10d4fa8c8348d1Deposit189974402021-09-11 17:05:5310 days 9 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.0071592
0xecd7cce188ddb6425eec82cd200e0a0f2c7905aec006f23664ed801c333d06daWithdraw188551142021-09-07 18:08:5014 days 8 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0xeefbaa39d43ef7a6f81dad0249b984c24f4673747530014a0066e8817a5448a5Withdraw188550792021-09-07 18:07:3614 days 8 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0xb389b47cf0fdb53950cf908b52669e3ad8e77dfff4c87ae9e0d573f5bf432fc4Deposit188511222021-09-07 15:28:0414 days 10 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.02983
0xf0b8601586c298f9c0963445102fd5adb1076247b95140a317dee445176d081fWithdraw188010252021-09-06 7:15:1915 days 19 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0x04c8fb146c6600c3417453f8229cbfacf8e5985dd0797bbbba115b471c005f12Withdraw188001972021-09-06 6:36:3215 days 19 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0xc7bbc49d892acdc955eb35599f870dae0f04360144ad68133e5e7565a5f0baffWithdraw187993902021-09-06 6:02:2215 days 20 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0x0b0536686d9b045ff9f3d743db983a5753da5dc8c57cf2035fe36352cae47024Withdraw187892382021-09-05 23:17:2416 days 2 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0x52f760d9d380adbea3b09bc04f10f9840218bd6dd0ad355db2711a60ae1a184eWithdraw187769132021-09-05 14:47:1016 days 11 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137484
0x25d14cc434d374adb23fc0850d183178a5c5737ba006494be062e02bb5e8bd42Withdraw187763742021-09-05 14:17:2016 days 11 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0x1d27a0a45dfc1b76c074e117c521b733e54232e2272a67042cfa3155c0577daeWithdraw187753312021-09-05 13:24:2616 days 12 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0x501493542fccbddac37409e3675a0c5851c6dcc023c45dde26c77a1cba0ce049Withdraw187745682021-09-05 12:50:1616 days 13 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0xe33d745114da7a220a056f61ddb42ab4371da5b70ac2840d8b6570d3619191c3Withdraw187742062021-09-05 12:32:3516 days 13 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0x6c606a5562a63013ad4db572fdee866beaf2fe69caa7abe2cc9a99ec65197ee5Withdraw187634662021-09-05 5:14:2516 days 21 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0xd8f639df55225ba2f486cd820f5ef322df95a7be26101f5cb29c979f62eb6e83Withdraw187553262021-09-04 23:49:4717 days 2 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0x29652d658cbc68d96402bd57bfd44045342019e08ba224f8e88a69c2215f17deWithdraw187550622021-09-04 23:36:2917 days 2 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0x5df4ec1df06da73705f6d76ec8e23b61ce0b0776261d7473c3655740dbde1d75Withdraw187548992021-09-04 23:30:5517 days 2 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0x7b12c50cd0e67207e142ca8a52187074df5cc8cdd46753397481d5062c7c8c1dWithdraw187440642021-09-04 16:24:4117 days 9 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0xd0442e40e7451645a8c50ec5047ad714af24663a24c3c2fad233aff69251dedbWithdraw187438702021-09-04 16:17:5617 days 9 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0x79817eb5f7f5b5b9eb232545271723980023bfacae90693df3fdb5da862bed88Withdraw187378482021-09-04 12:12:3017 days 14 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0xae13a6ca5a88fa3c09c5c894fc56554f0b60f0060df981b8217dbc6c4323c12eWithdraw187376842021-09-04 12:06:5417 days 14 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0xcea53df77a9291ba749a06d300930063b332a7827ffa34354a8f7bd3588df63dWithdraw187373522021-09-04 11:53:3717 days 14 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0x93d86ed3bcd81b6040958b3e43b2c631df6b3677c5d132e99f7c5919c9b98c89Withdraw187372642021-09-04 11:50:1517 days 14 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0x2e3d42d5c94f67d945c86bd57d78d0b27fb93d7fddae19bbedfe282300639a26Withdraw187366132021-09-04 11:25:4517 days 14 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
0x3709460e914221d735a8369c293be47599db7a919425cc3de5ae28a318381f0cWithdraw187365142021-09-04 11:22:2317 days 14 hrs ago0x3ca77ad191e1181b7cc9b0f8a05d5aa3d20da075 IN  0xa86212ed4783ea412e4a4e5fb2dad3fd0dd870e20 MATIC0.00137508
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Contract Source Code Verified (Exact Match)

Contract Name:
WexWithdrawer

Compiler Version
v0.8.6+commit.11564f7e

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at polygonscan.com on 2021-09-02
*/

// SPDX-License-Identifier: MIT

pragma solidity 0.8.6;

/*
 * @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;
    }
}

/**
 * @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);
    }
}

/**
 * @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);
}

/**
 * @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);
    }

    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

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

/**
 * @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");
        }
    }
}

interface IWswapRouter {
    function swapExactTokensForTokensSupportingFeeOnTransferTokens(
        uint amountIn,
        uint amountOutMin,
        address[] calldata path,
        address to,
        uint deadline
    ) external;
}

interface IWUSDMaster {
    function withdrawWex(uint256 amount) external;
}

contract WexWithdrawer is Ownable {
    using SafeERC20 for IERC20;
    
    IERC20 public immutable wex;
    IWUSDMaster public wusdMaster;
    
    bool public isMasterChangeInitiated = false;
    uint256 public masterChangeTimestamp;
    IWUSDMaster public newWusdMaster;
    
    event Withdraw(uint256 amount);
    event Deposit(uint256 amount);
    event InitiateMasterChange(uint256 timestamp, address master);
    event CancelMasterChange();
    event MasterChanged(address master);
    
    constructor(IERC20 _wex, IWUSDMaster _wusdMaster) {
        require(
            address(_wex) != address(0) &&
            address(_wusdMaster) != address(0),
            "zero address in constructor"
        );
        wex = _wex;
        wusdMaster = _wusdMaster;
    }
    
    function withdraw(uint256 amount) external onlyOwner {
        wusdMaster.withdrawWex(amount);
        
        emit Withdraw(amount);
    }
    
    function deposit(uint256 amount) external onlyOwner {
        wex.safeTransfer(address(wusdMaster), amount);
        
        emit Deposit(amount);
    }
    
    function initiateMasterChange(uint256 timestamp, IWUSDMaster _wusdMaster) external onlyOwner {
        require(!isMasterChangeInitiated, 'change already initiated');
        require(timestamp >= block.timestamp + 48 hours, 'timestamp not valid!');
        require(address(_wusdMaster) != address(0),"zero address");
        
        isMasterChangeInitiated = true;
        masterChangeTimestamp = timestamp;
        newWusdMaster = _wusdMaster;
        
        emit InitiateMasterChange(timestamp, address(_wusdMaster));
    }
    
    function cancelMasterChange() external onlyOwner {
        require(isMasterChangeInitiated, 'change not initiated');
        
        isMasterChangeInitiated = false;
        masterChangeTimestamp = 0;
        newWusdMaster = IWUSDMaster(address(0));
        
        emit CancelMasterChange();
    }
    
    function changeMaster() external onlyOwner {
        require(isMasterChangeInitiated, 'change not initiated');
        require(block.timestamp >= masterChangeTimestamp, 'not yet possible');
        
        wusdMaster = newWusdMaster;
        
        isMasterChangeInitiated = false;
        masterChangeTimestamp = 0;
        newWusdMaster = IWUSDMaster(address(0));
        
        emit MasterChanged(address(wusdMaster));
    }
}

Contract Security Audit

Contract ABI

[{"inputs":[{"internalType":"contract IERC20","name":"_wex","type":"address"},{"internalType":"contract IWUSDMaster","name":"_wusdMaster","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[],"name":"CancelMasterChange","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Deposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"uint256","name":"timestamp","type":"uint256"},{"indexed":false,"internalType":"address","name":"master","type":"address"}],"name":"InitiateMasterChange","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"master","type":"address"}],"name":"MasterChanged","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":"uint256","name":"amount","type":"uint256"}],"name":"Withdraw","type":"event"},{"inputs":[],"name":"cancelMasterChange","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"changeMaster","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"timestamp","type":"uint256"},{"internalType":"contract IWUSDMaster","name":"_wusdMaster","type":"address"}],"name":"initiateMasterChange","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"isMasterChangeInitiated","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"masterChangeTimestamp","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"newWusdMaster","outputs":[{"internalType":"contract IWUSDMaster","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"wex","outputs":[{"internalType":"contract IERC20","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"wusdMaster","outputs":[{"internalType":"contract IWUSDMaster","name":"","type":"address"}],"stateMutability":"view","type":"function"}]

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

0000000000000000000000004c4bf319237d98a30a929a96112effa8da3510eb000000000000000000000000c9ff58bd2a1cb4fab0fec5a0d061527db1fbb923

-----Decoded View---------------
Arg [0] : _wex (address): 0x4c4bf319237d98a30a929a96112effa8da3510eb
Arg [1] : _wusdMaster (address): 0xc9ff58bd2a1cb4fab0fec5a0d061527db1fbb923

-----Encoded View---------------
2 Constructor Arguments found :
Arg [0] : 0000000000000000000000004c4bf319237d98a30a929a96112effa8da3510eb
Arg [1] : 000000000000000000000000c9ff58bd2a1cb4fab0fec5a0d061527db1fbb923


Deployed ByteCode Sourcemap

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Swarm Source

ipfs://0518eb9563fd3c4726d66249635c5cbf8d8063876550f670c578421434d8eda6
Block Transaction Gas Used Reward
Age Block Fee Address BC Fee Address Voting Power Jailed Incoming
Block Uncle Number Difficulty Gas Used Reward
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