If you wanted to provide a mapping of npubs to display_names in static form, how many characters of the npub do you need? This is a variation of the birthday problem. Just curious about what chance of collision is acceptable as I trade it off against a need for hundreds of profile requests. #nostrdev
You don't know because there's no way of knowing how many pubkeys exist.
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Guess we could go 2^256 as an upper bound?
