Contract.sol

// SPDX-License-Identifier: MIT
pragma solidity ^0.8.30;

contract Interval {
    string public name = "Interval";
    string public symbol = "INT";
    uint8 public decimals = 18;
    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 = 200000000 * 10 ** uint256(decimals);
        balanceOf[msg.sender] = initialSupply;
        totalSupply = initialSupply;
        emit Transfer(address(0), msg.sender, initialSupply);
    }

    function transfer(address to, uint256 value) public returns (bool success) {
        require(to != address(0), "transfer to zero address");
        require(balanceOf[msg.sender] >= value, "insufficient balance");
        unchecked {
            balanceOf[msg.sender] -= value;
            balanceOf[to] += value;
        }
        emit Transfer(msg.sender, to, value);
        return true;
    }

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

    function transferFrom(address from, address to, uint256 value) public returns (bool success) {
        require(to != address(0), "transfer to zero address");
        require(balanceOf[from] >= value, "insufficient balance");
        require(allowance[from][msg.sender] >= value, "allowance too low");
        unchecked {
            balanceOf[from] -= value;
            balanceOf[to] += value;
            allowance[from][msg.sender] -= value;
        }
        emit Transfer(from, to, value);
        return true;
    }

    function burn(uint256 value) public returns (bool success) {
        require(balanceOf[msg.sender] >= value, "insufficient balance");
        unchecked {
            balanceOf[msg.sender] -= value;
            totalSupply -= value;
        }
        emit Transfer(msg.sender, address(0), value);
        return true;
    }
}