Contract 0xd28985698798a0d6d25faa338a50f8d90cbac98e

/**
 *Submitted for verification at hecoinfo.com on 2022-01-17
*/

// SPDX-License-Identifier: UNLICENSED
pragma solidity ^0.6.12;
pragma experimental ABIEncoderV2;

library Roles {
    struct Role {
        mapping(address => bool) bearer;
    }

    function add(Role storage role, address account) internal {
        require(!has(role, account), "Roles: account already has role");
        role.bearer[account] = true;
    }

    function remove(Role storage role, address account) internal {
        require(has(role, account), "Roles: account does not have role");
        role.bearer[account] = false;
    }

    function has(Role storage role, address account)
        internal
        view
        returns (bool)
    {
        require(account != address(0), "Roles: account is the zero address");
        return role.bearer[account];
    }
}

contract Multicall2 {
    using Roles for Roles.Role;

    event WhitelistAdminAdded(address indexed account);
    event WhitelistAdminRemoved(address indexed account);

    Roles.Role private _whitelistAdmins;

    constructor() public {
        _addWhitelistAdmin(_msgSender());
    }

    struct Call {
        address target;
        bytes callData;
    }

    function tryAggregate(bool requireSuccess, Call[] memory calls)
        public
        onlyWhitelistAdmin
    {
        for (uint256 i = 0; i < calls.length; i++) {
            (bool success, bytes memory ret) = calls[i].target.call(
                calls[i].callData
            );

            if(requireSuccess) {
                require(success, string(ret));
            }
        }
    }

    modifier onlyWhitelistAdmin() {
        require(
            isWhitelistAdmin(_msgSender()),
            "WhitelistAdminRole: caller does not have the WhitelistAdmin role"
        );
        _;
    }

    function isWhitelistAdmin(address account) public view returns (bool) {
        return _whitelistAdmins.has(account);
    }

    function addWhitelistAdmin(address account) public onlyWhitelistAdmin {
        _addWhitelistAdmin(account);
    }

    function _addWhitelistAdmin(address account) internal {
        _whitelistAdmins.add(account);
        emit WhitelistAdminAdded(account);
    }

    function removeWhitelistAdmin(address account) public onlyWhitelistAdmin {
        _whitelistAdmins.remove(account);
        emit WhitelistAdminRemoved(account);
    }

    function _msgSender() internal view returns (address) {
        return msg.sender;
    }
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"}],"name":"WhitelistAdminAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"}],"name":"WhitelistAdminRemoved","type":"event"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"addWhitelistAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"isWhitelistAdmin","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"removeWhitelistAdmin","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"requireSuccess","type":"bool"},{"components":[{"internalType":"address","name":"target","type":"address"},{"internalType":"bytes","name":"callData","type":"bytes"}],"internalType":"struct Multicall2.Call[]","name":"calls","type":"tuple[]"}],"name":"tryAggregate","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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