Фабрика записей 1

records.sol

// SPDX-License-Identifier: GPL-3.0
pragma solidity ^0.8.0;

abstract contract Record {
    uint public timeOfCreation;

    function getRecordType() public virtual pure returns(string memory);

    constructor() {
        timeOfCreation = block.timestamp;
    }
}

contract AddressRecord is Record{
    address public record;

    function getRecordType() public pure override returns(string memory) {
        return "address";
    }

    function setRecord(address _record) public {
        record = _record;
    }
}

contract StringRecord is Record{
    
    string public record;

    function getRecordType() public pure override returns(string memory) {
        return "string";
    }

    function setRecord(string memory _record) public {
        record = _record;
    }
}

contract RecordFactory {
    Record[] records;

    function addRecord(string memory _record) public {
        StringRecord newRecord = new StringRecord();
        newRecord.setRecord(_record);
        records.push(newRecord);
    }

    function addRecord(address _record) public {
        AddressRecord newRecord = new AddressRecord();
        newRecord.setRecord(_record);
        records.push(newRecord);
    }

    function getTime(uint _idx) public view returns(string memory) {
        return records[_idx].getRecordType();
    }
}