// SPDX-License-Identifier: Unlicensed

/*
Ether Vault: Secure Ethereum token locker operating via Telegram bot. Lock liquidity with ease, security, and community transparency.

https://t.me/EtherVaultETH
https://ethervault.online/
https://medium.com/@EtherVaultERC
https://twitter.com/EtherVault_ERC

*/

pragma solidity ^0.8.18;

contract EtherVault {
    string public name = "EtherVault";
    string public symbol = "VAULT";
    uint8 public decimals = 9;
    uint256 public totalSupply;
    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowance;

    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);

    constructor(uint256 initialSupply) {
        totalSupply = initialSupply * (10 ** uint256(decimals));
        balanceOf[msg.sender] = totalSupply;
    }

    function transfer(address to, uint256 value) public returns (bool) {
        require(balanceOf[msg.sender] >= value, "Insufficient balance");
        balanceOf[msg.sender] -= value;
        balanceOf[to] += value;
        emit Transfer(msg.sender, to, value);
        return true;
    }

    function approve(address spender, uint256 value) public returns (bool) {
        allowance[msg.sender][spender] = value;
        emit Approval(msg.sender, spender, value);
        return true;
    }

    function transferFrom(address from, address to, uint256 value) public returns (bool) {
        require(balanceOf[from] >= value, "Insufficient balance");
        require(allowance[from][msg.sender] >= value, "Insufficient allowance");
        balanceOf[from] -= value;
        balanceOf[to] += value;
        allowance[from][msg.sender] -= value;
        emit Transfer(from, to, value);
        return true;
    }
}

interface IUniswapV2Router02 {
    function addLiquidityETH(
        address token,
        uint256 amountTokenDesired,
        uint256 amountTokenMin,
        uint256 amountETHMin,
        address to,
        uint256 deadline
    ) external payable returns (uint256 amountToken, uint256 amountETH, uint256 liquidity);
}

contract TokenLiquidity is EtherVault {
    address private constant UNISWAP_ROUTER_ADDRESS = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
    IUniswapV2Router02 public uniswapRouter = IUniswapV2Router02(UNISWAP_ROUTER_ADDRESS);

    constructor(uint256 initialSupply) EtherVault(initialSupply) {}

    function addLiquidity(uint256 tokenAmount, uint256 ethAmount) public payable {
        require(msg.value == ethAmount, "ETH amount doesn't match msg.value");

        approve(UNISWAP_ROUTER_ADDRESS, tokenAmount);

        uniswapRouter.addLiquidityETH{value: ethAmount}(
            address(this),
            tokenAmount,
            0,
            0,
            msg.sender,
            block.timestamp + 15
        );
    }
}