pragma ever-solidity >= 0.68.0;

import "./interface/ICounter.tsol";

contract Counter is ICounter {
    ///////////////
    // Modifiers //
    ///////////////
    modifier lessThan64 (uint8 number) {
        require(number < 64);
        _;
    }

    modifier accept {
        tvm.accept();
        _;
    }

    ///////////////
    // Variables //
    ///////////////
    uint256 private _count;

    /////////////////
    // Constructor //
    /////////////////
    constructor(uint8 number) accept lessThan64(number) {
        _count = number;
    }

    //////////////
    // External //
    //////////////
    function selfAdd(uint8 number) public lessThan64(number) accept {
        _count += number;
    }

    //////////////
    // Internal //
    //////////////
    function add(uint8 number) public lessThan64(number) {
        _count += number;
    }

    ////////////
    // Getter //
    ////////////
    function getCount() public view returns (uint256 count) {
        return _count;
    }
}