Contract 0x797887e464e49e6B376fe15dA9FDdf15A770Cd6B 1

// SPDX-License-Identifier: AGPL-1.0
pragma solidity 0.8.9;

import "@openzeppelin/contracts/metatx/ERC2771Context.sol";
import "@openzeppelin/contracts/access/Ownable.sol";

contract JustFrens is Ownable, ERC2771Context {
    mapping(address => mapping(address => bool)) public followings;
    event Followed(address indexed follower, address indexed followee);
    event Unfollowed(address indexed follower, address indexed followee);

    constructor(address _trustedForwarder) ERC2771Context(_trustedForwarder) {}

    function follow(address followee) external {
        address follower = _msgSender();
        require(follower != followee, "self");
        _follow(follower, followee);
    }

    function bulkFollow(address[] calldata followees) external {
        address follower = _msgSender();

        for (uint256 index = 0; index < followees.length; index++) {
            address followee = followees[index];
            _follow(follower, followee);
        }
    }

    function _follow(address follower, address followee) internal {
        followings[follower][followee] = true;
        emit Followed(follower, followee);
    }

    function unfollow(address followee) external {
        address follower = _msgSender();
        followings[follower][followee] = false;
        emit Unfollowed(follower, followee);
    }

    function setTrustedForwarder(address _forwarder) external onlyOwner {
        ERC2771Context._trustedForwarder = _forwarder;
    }

    function _msgData() internal view override(Context, ERC2771Context) returns (bytes calldata) {
        return ERC2771Context._msgData();
    }

    function _msgSender() internal view override(Context, ERC2771Context) returns (address sender) {
        return ERC2771Context._msgSender();
    }
}

// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts v4.4.1 (metatx/ERC2771Context.sol)

pragma solidity ^0.8.0;

import "../utils/Context.sol";

/**
 * @dev Context variant with ERC2771 support.
 */
abstract contract ERC2771Context is Context {
    address internal _trustedForwarder;

    constructor(address trustedForwarder) {
        _trustedForwarder = trustedForwarder;
    }

    function isTrustedForwarder(address forwarder) public view virtual returns (bool) {
        return forwarder == _trustedForwarder;
    }

    function _msgSender() internal view virtual override returns (address sender) {
        if (isTrustedForwarder(msg.sender)) {
            // The assembly code is more direct than the Solidity version using `abi.decode`.
            assembly {
                sender := shr(96, calldataload(sub(calldatasize(), 20)))
            }
        } else {
            return super._msgSender();
        }
    }

    function _msgData() internal view virtual override returns (bytes calldata) {
        if (isTrustedForwarder(msg.sender)) {
            return msg.data[:msg.data.length - 20];
        } else {
            return super._msgData();
        }
    }
}

// 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);
    }
}

// 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;
    }
}

{
  "optimizer": {
    "enabled": true,
    "runs": 2000
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "devdoc",
        "userdoc",
        "metadata",
        "abi"
      ]
    }
  },
  "metadata": {
    "useLiteralContent": true
  },
  "libraries": {}
}

• No Contract Security Audit Submitted- Submit Audit Here

[{"inputs":[{"internalType":"address","name":"_trustedForwarder","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"follower","type":"address"},{"indexed":true,"internalType":"address","name":"followee","type":"address"}],"name":"Followed","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":true,"internalType":"address","name":"follower","type":"address"},{"indexed":true,"internalType":"address","name":"followee","type":"address"}],"name":"Unfollowed","type":"event"},{"inputs":[{"internalType":"address[]","name":"followees","type":"address[]"}],"name":"bulkFollow","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"followee","type":"address"}],"name":"follow","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"followings","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"forwarder","type":"address"}],"name":"isTrustedForwarder","outputs":[{"internalType":"bool","name":"","type":"bool"}],"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":"_forwarder","type":"address"}],"name":"setTrustedForwarder","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"followee","type":"address"}],"name":"unfollow","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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

00000000000000000000000086c80a8aa58e0a4fa09a69624c31ab2a6cad56b8

-----Decoded View---------------
Arg [0] : _trustedForwarder (address): 0x86c80a8aa58e0a4fa09a69624c31ab2a6cad56b8

-----Encoded View---------------
1 Constructor Arguments found :
Arg [0] : 00000000000000000000000086c80a8aa58e0a4fa09a69624c31ab2a6cad56b8