openzeppelin-contracts/contracts/utils/Multicall.sol

// SPDX-License-Identifier: MIT

pragma solidity ^0.8.0;

import "./Address.sol";

/**
 * @dev Provides a function to batch together multiple calls in a single external call.
 */
abstract contract Multicall {
    /**
    * @dev Receives and executes a batch of function calls on this contract.
    */
    function multicall(bytes[] calldata data) external returns (bytes[] memory results) {
        results = new bytes[](data.length);
        for (uint i = 0; i < data.length; i++) {
            results[i] = Address.functionDelegateCall(address(this), data[i]);
        }
        return results;
    }
}