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/**
 *Submitted for verification at lineascan.build/ on 2024-01-22
*/

pragma solidity ^0.5.17;

// SPDX-License-Identifier: GPL-3.0
contract CheckIn {
    mapping(address => mapping(uint256 => bool)) public checkInData;

    function checkIn(uint256 date) external  {
        checkInData[msg.sender][date] = true;
    }
}

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[{"constant":false,"inputs":[{"internalType":"uint256","name":"date","type":"uint256"}],"name":"checkIn","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"checkInData","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"}]

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bzzr://c7ba471b8392db6fa69a24914fa714e602383becbb98540c3cd2f8eef190e00b