If I attempt to install vivaldi browser from the original rpm I see this:
Running transaction
Transaction failed: Signature verification failed.
OpenPGP check for package "vivaldi-stable-7.6.3797.63-1.x86_64" (vivaldi-stable-7.6.3797.63-1.x86_64.rpm) from repo "@commandline" has failed: The repository does not have any OpenPGP keys configured.
How can I succesfully install vivaldi browser from the rpm?