We could make use of the DelegateScenario enum to parameterize and thus combine create_metadata_delegate_v1 and create_holder_delegate_v1, and then simplify the optional role arguments for create_pda_account into one.
Similarly we could combine revoke_metadata_delegate_v1 and revoke_holder_delegate_v1, as well as close_metadata_delegate_record and close_holder_delegate_record.
The revoke changes refactor a bit to avoid some logic duplication.
Idea
DelegateScenarioenum to parameterize and thus combinecreate_metadata_delegate_v1andcreate_holder_delegate_v1, and then simplify the optionalrolearguments forcreate_pda_accountinto one.revoke_metadata_delegate_v1andrevoke_holder_delegate_v1, as well asclose_metadata_delegate_recordandclose_holder_delegate_record.revokechanges refactor a bit to avoid some logic duplication.