BUD-02
======

User Server List
-------------------------

`draft` `optional`

Defines a replaceable event using `kind:10063` to advertise the blossom servers a user uses to host their blobs.

The event MUST include at least one `server` tag containing the full server URL including the `http://` or `https://`.

The order of these tags is important and should be arranged with the users most "reliable" or "trusted" servers coming first.

The `.content` is not used.

```json
{
  "id": "e4bee088334cb5d38cff1616e964369c37b6081be997962ab289d6c671975d71",
  "pubkey": "781208004e09102d7da3b7345e64fd193cd1bc3fce8fdae6008d77f9cabcd036",
  "content": "",
  "kind": 10063,
  "created_at": 1708774162,
  "tags": [
    ["server", "https://cdn.self.hosted"],
    ["server", "https://cdn.satellite.earth"]
  ],
  "sig": "cc5efa74f59e80622c77cacf4dd62076bcb7581b45e9acff471e7963a1f4d8b3406adab5ee1ac9673487480e57d20e523428e60ffcc7e7a904ac882cfccfc653"
}
```

## Client Integration

When uploading blobs clients should attempt to upload the blob to all or at least the top 3 server on the list event.

This ensures that the blob is available in multiple locations in the case one of the servers goes offline.

## Server Integration

Servers may use this event kind to discover other servers that a user is uploading to in order to download specific blobs from.