Multiplication_example.sol

pragma ton - solidity >= 0.35 .0;
pragma AbiHeader expire;

contract Multiplication {

    uint storedData = 1;

    constructor() public {
        require(tvm.pubkey() != 0, 101);
        require(msg.pubkey() == tvm.pubkey(), 102);
        tvm.accept();
    }

    modifier checkOwnerAndAccept {
        require(msg.pubkey() == tvm.pubkey(), 102);
        tvm.accept();
        _;
    }

    function multiplyStoredNumberByMyNumber(uint x) public checkOwnerAndAccept {
        require(1 <= x && x <= 10);
        storedData = storedData * x;
    }

    function getStoredNumber() public checkOwnerAndAccept view returns(uint) {
        return storedData;
    }

}