Untitled

// SPDX-License-Identifier: SEE LICENSE IN LICENSE
pragma solidity ^0.8.24;

contract Token {

    string public name = "Meadow Token";
    string public symbol = "MDW";

    uint256 public totalSupply = 1000000; // 10e6
    address public owner;

    mapping (address => uint256) balances;
    mapping (address => mapping (address => uint256)) allowances;

    event Transfer(address indexed _from, address indexed _to, uint256 _value);
    event Approval(address indexed _from, address indexed _to, uint256 _value);

    constructor() {
        balances[msg.sender] = totalSupply;
        owner = msg.sender;
    }

    // Write functions

    function transfer(address to, uint256 amount) external {
        require(balances[msg.sender] >= amount, "Insufficient balance");
        balances[msg.sender] -= amount;
        balances[to] += amount;
        emit Transfer(msg.sender, to, amount);
    }

    function transferFrom(address from, address to, uint256 amount) external {
        require(balances[from] >= amount, "Insufficient balance");
        require(allowances[from][msg.sender] >= amount, "Insufficient allowance");
        balances[from] -= amount;
        balances[to] += amount;
        allowances[from][msg.sender] -= amount;
        emit Transfer(from, to, amount);
    }

    function approve(address spender, uint256 amount) external {
        require(balances[msg.sender] >= amount, "Insufficient balance");
        allowances[msg.sender][spender] = amount;
        emit Approval(msg.sender, spender, amount);
    }

    function increaseAllowance(address spender, uint256 addedValue) external {
        require(balances[msg.sender] >= addedValue, "Insufficient balance");
        allowances[msg.sender][spender] += addedValue;
        emit Approval(msg.sender, spender, allowances[msg.sender][spender]);
    }

    function decreaseAllowance(address spender, uint256 subtractedValue) external {
        require(balances[msg.sender] >= subtractedValue, "Insufficient balance");
        require(allowances[msg.sender][spender] >= subtractedValue, "Insufficient allowance");
        allowances[msg.sender][spender] -= subtractedValue;
        emit Approval(msg.sender, spender, allowances[msg.sender][spender]);
    }

    // Read functions

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

    function allowance(address from, address to) external view returns (uint256) {
        return allowances[from][to];
    }
}