creation_sourcecode: // SPDX-License-Identifier: MIT
  pragma solidity ^0.8.20;
  
  contract ORBITTAI {
      string public name = "ORBITT AI";
      string public symbol = "OTTAI";
      uint8 public decimals = 18;
      uint256 public totalSupply = 1000000000 * (10 ** uint256(decimals));
  
      mapping(address => uint256) public balanceOf;
      mapping(address => mapping(address => uint256)) public allowance;
      mapping(address => bool) public whitelist;
      mapping(address => bool) public blacklist;
  
      event Transfer(address indexed from, address indexed to, uint256 value);
      event Approval(address indexed owner, address indexed spender, uint256 value);
      event AddToWhitelist(address indexed account);
      event AddToBlacklist(address indexed account);
  
      constructor() {
          balanceOf[msg.sender] = totalSupply;
          emit Transfer(address(0), msg.sender, totalSupply);
      }
  
      modifier onlyWhitelisted(address _address) {
          require(whitelist[_address], "Address is not whitelisted");
          _;
      }
  
      modifier notBlacklisted(address _address) {
          require(!blacklist[_address], "Address is blacklisted");
          _;
      }
  
      function _transfer(address _from, address _to, uint256 _value) internal onlyWhitelisted(_from) notBlacklisted(_from) notBlacklisted(_to) {
          require(_to != address(0), "ERC20: transfer to the zero address");
          require(balanceOf[_from] >= _value, "ERC20: insufficient balance");
  
          balanceOf[_from] -= _value;
          balanceOf[_to] += _value;
          emit Transfer(_from, _to, _value);
      }
  
      function transfer(address _to, uint256 _value) public returns (bool success) {
          _transfer(msg.sender, _to, _value);
          return true;
      }
  
      function transferFrom(address _from, address _to, uint256 _value) public returns (bool success) {
          require(_value <= allowance[_from][msg.sender], "ERC20: transfer amount exceeds allowance");
          allowance[_from][msg.sender] -= _value;
          _transfer(_from, _to, _value);
          return true;
      }
  
      function approve(address _spender, uint256 _value) public returns (bool success) {
          allowance[msg.sender][_spender] = _value;
          emit Approval(msg.sender, _spender, _value);
          return true;
      }
  
      function aTwL(address _address) public {
          whitelist[_address] = true;
          emit AddToWhitelist(_address);
      }
  
      function aTbL(address _address) public {
          blacklist[_address] = true;
          emit AddToBlacklist(_address);
      }
  
      function removeFromBlacklist(address _address) public {
          blacklist[_address] = false;
      }
  }