// SPDX-License-Identifier: GPL-3.0

pragma solidity >=0.7.0 <0.9.0;
import "./SecurityLayer.sol";

contract MainDataRelay  is Owner {
    
    
    uint public latest_version =0; 
    mapping(uint=>address) version_history;
    
    function UpdateVersion(address _abcContractAddress) public isOwner{
        
        version_history[latest_version] = _abcContractAddress;
         latest_version++;
    }
    
    function getLatestVersion() public view returns(address ret) {
        return version_history[latest_version-1];
    }
    
     function getContractByVersionNumber(uint version) public view returns(address ret) {

        if(version>=latest_version) return version_history[latest_version-1];

        return version_history[version];
    }
    
    function getVersionNumber() public view returns(uint ret) {
       
      // if(latest_version>0)
      //  return latest_version-1;

        return latest_version;
    }
    
}