Returns the address pointer from a kind:38000 recommendation event
This a tag points to the kind:38172 event of the cashu mint
The first value is the event identifier, the second value is a relay hint
Each recommendation event recommends a single mint, so there is at most one a tag
Returns the address pointer from a kind:38000 recommendation event This
atag points to the kind:38172 event of the cashu mint The first value is the event identifier, the second value is a relay hint Each recommendation event recommends a single mint, so there is at most oneatag