Aggregator contract needed

[numpde]

Adoption of the main contract in several places (e.g., cities) will lead to a fragmentation of the on-chain database. An aggregator contract could allow for checking of the registration/missing status across multiple instances of the main contract. Moreover, the main contract could point to this contract/function, as well.

Something along the lines of:

pragma solidity ^0.8.0;

import "./BicycleComponentV1.sol";

contract Aggregator {
    // Array to store registered bicycle component contracts
    address[] public registeredContracts;

    // Function to add a bicycle component contract instance
    function addBicycleComponentContract(address contractAddress) external {
        // Add checks to ensure only authorized entities can add a contract
        registeredContracts.push(contractAddress);
    }

    // Function to check if a bicycle component with the given serial number is missing
    // and return the contract's address if it's missing
    function isMissing(string memory serialNumber) external view returns (address) {
        // Iterate over registered contracts
        for (uint256 i = 0; i < registeredContracts.length; i++) {
            // Create an instance of the BicycleComponentV1 contract
            BicycleComponentV1 bicycleComponent = BicycleComponentV1(registeredContracts[i]);

            // Generate tokenId from serialNumber
            uint256 tokenId = bicycleComponent.generateTokenId(serialNumber);

            // Check if the bicycle component is missing in the current contract
            bool missing = bicycleComponent.missingStatus(tokenId);

            // If the bicycle component is missing, return the contract's address
            if (missing) {
                return registeredContracts[i];
            }
        }

        // If the bicycle component is not missing in any contract, return an empty address
        return address(0);
    }
}