Contract Source Code (Solidity Standard Json-Input format)

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/**
 * 
 
  Watchtower

*/

//SPDX-License-Identifier: UNLICENSED

pragma solidity 0.8.6;

contract Watchtower
{
    address private owner;
    uint256 private registerPrice;
    mapping (address => bool) private members;
    uint256 memberCount; 
    uint256 maxMembers; 
    
    constructor()
    {
        owner = msg.sender;   
        memberCount = 0; 
        maxMembers = 250; 
        registerPrice = 0.2 ether;
    }
    
    // Readers
    
    function getRegisterPrice() external view returns(uint256)
    {
        return(registerPrice);
    }

      function getMaxMembers() external view returns(uint256)
    {
        return(maxMembers);
    }


    function getMemberCount() external view returns(uint256)
    {
        return(memberCount);
    }

    function getOwner() external view returns(address)
    {
        return(owner);
    }
    
    function isMember(address _account) external view returns(bool)
    {
        return(members[_account]);
    }
    
    // Functions

    function setOwner(address _owner) external
    {
        require(msg.sender == owner, "Function only callable by owner!");
    
        owner = _owner;    
    }
    
    function setRegisterPrice(uint256 _registerPrice) external
    {
        require(msg.sender == owner, "Function only callable by owner!");
        
        registerPrice = _registerPrice;
    }

    function setMaxMembers(uint256 _maxMembers) external
    {
        require(msg.sender == owner, "Function only callable by owner!");
        
        maxMembers = _maxMembers;
    }
    
    
    // Register functions
    receive() external payable
    {
        register();
    }
    
    function register() public payable
    {
        require(!members[msg.sender], "Address already registered!");
        require(msg.value >= registerPrice, "Amount sent below register price!");
        require(memberCount < maxMembers, "We're currently at maximum members");
        
        memberCount += 1; 
        members[msg.sender] = true;
    }

    // Withdraw Ether
    function withdraw(uint256 _amount, address _receiver) external
    {   
        require(msg.sender == owner, "Function only callable by owner!");
        
        payable(_receiver).transfer(_amount);
    }
}

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

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[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"getMaxMembers","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getMemberCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getOwner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getRegisterPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_account","type":"address"}],"name":"isMember","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"register","outputs":[],"stateMutability":"payable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_maxMembers","type":"uint256"}],"name":"setMaxMembers","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_owner","type":"address"}],"name":"setOwner","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_registerPrice","type":"uint256"}],"name":"setRegisterPrice","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_amount","type":"uint256"},{"internalType":"address","name":"_receiver","type":"address"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"},{"stateMutability":"payable","type":"receive"}]

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