This Multicall aggregates results from multiple contract constant function calls which are not all required to succeed.

Multicall.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

// Copied and modified from https://github.com/makerdao/multicall/blob/e0c7d96c105b665b24ba9b7be22d9df22199de82/src/Multicall.sol
// This Multicall aggregates results from multiple contract constant function calls 
//   which are not all required to succeed.
contract Multicall {
    struct Call {
        address target;
        bytes callData;
    }
    
    struct Result {
        bool success;
        bytes returnData;
    }
    
    function aggregate(Call[] memory calls) public returns (uint256 blockNumber, Result[] memory result) {
        blockNumber = block.number;
        result = new Result[](calls.length);
        for(uint256 i = 0; i < calls.length; i++) {
            (result[i].success, result[i].returnData) = calls[i].target.call(calls[i].callData);
        }
    }
}