DDNS-functions-getDomainHash

/*
     * @dev - Get (domain name + top level) hash used for unique identifier 
     * @param domain
     * @param topLevel
     * @return domainHash
     */
    function getDomainHash(bytes memory domain, bytes12 topLevel) public pure returns(bytes32) {
        // @dev - tightly pack parameters in struct for keccak256
        return keccak256(abi.encodePacked(domain, topLevel));
    }