constructor() public {
        bonusEnds = now + 8 weeks;
        endDate = now + 8 weeks;
        startDate = now;
        main_addr = 0xAD7615B0524849918AEe77e6c2285Dd7e8468650;
        tokenOwner = 0x6ec4dd24d36d94e96cc33f1ea84ad3e44008c628;
        r = Robocalls(main_addr);
    }