It's almost New Year, and in just a few hours Steamboat Willie will enter the public domain: https://www.msn.com/en-gb/news/other/disney-to-lose-copyright-of-early-version-of-mickey-mouse/ar-AA1mfxRH

Steamboat Willie was originally going to enter PD in 2004, but Disney got passed the "Mickey Mouse Protection Act" in 1998 to stop that from happening. They extended the length by 20 years, and it is now 20 years later, so Disney is finally forced to swallow what it chewed.

To celebrate this momentous occasion, I present to you "Copying is Not Theft" by @nina :

I built a small Nostr in-memory datastore based on what I'm calling "microfilters". A microfilter is a filter to get a single note or author, eg `{ ids: ['123'] }` or `{ kinds: [0], authors: ['456'] }`

When an event is added to the store, it generates all possible microfilters for that event (there are just a couple supported so far), then uses stringify-stable on the filters to use as keys. It sets the event on each key.

To do lookups, you have to pass in microfilters. They get converted to keys with stringify-stable then looked up by key. The result is a key-value store that only works for filters with specific criteria. I know I'm not the first to do this. But it improves performance and reliability a lot for the most basic and common queries.

https://gitlab.com/soapbox-pub/ditto/-/blob/main/src/db/memorelay.ts

I created a Nostr event type to represent a Registered Relay User. It's published by the admin pubkey of the relay itself (NIP-11). It means the relay recognizes the user as having an account, possibly granting it special privileges, and granting it a NIP-05 on the relay's domain.

{
"id": "d6ae2f320ae163612bf28080e7c6e55b228ee39bfa04ad50baab2e51022d4d59",
"kind": 30361,
"pubkey": "4cfc6ceb07bbe2f5e75f746f3e6f0eda53973e0374cd6bdbce7a930e10437e06",
"content": "",
"created_at": 1691568245,
"tags": [
["d", "79c2cae114ea28a981e7559b4fe7854a473521a8d22a66bbab9fa248eb820ff6"],
["name", "alex"],
["role", "user"],
["origin", "https://ditto.ngrok.app"],
["alt", "@alex@ditto.ngrok.app's account was updated by the admins of ditto.ngrok.app"]
],
"sig": "fc12db77b1c8f8aa86c73b617f0cd4af1e6ba244239eaf3164a292de6d39363f32d6b817ffff796ace7a103d75e1d8e6a0fb7f618819b32d81a953b4a75d7507"
}