🌸 Blossom - Blobs stored simply on mediaservers

Blossom uses nostr public / private keys for identities. Users are expected to sign authorization events to prove their identity when interacting with servers

What is it?

Blossom is a spec for a set of HTTP endpoints that allow users to store blobs of data on publicly accessible servers

What are blobs

Blobs are packs of binary data addressed by their sha256 hash

How does it work?

Blossom Servers expose four endpoints for managing blobs

• GET /<sha256> (optional file .ext) BUD-01
• HEAD /<sha256> (optional file .ext) BUD-01
• PUT /upload BUD-02
  • Authentication: Signed nostr event
  • Return a blob descriptor
• HEAD /upload BUD-06
• GET /list/<pubkey> BUD-02
  • Returns an array of blob descriptors
  • Authentication (optional): Signed nostr event
• DELETE /<sha256> BUD-02
  • Authentication: Signed nostr event
• PUT /mirror BUD-04
  • Authentication: Signed nostr event

Protocol specification (BUDs)

BUDs stand for Blossom Upgrade Documents.

See the BUDs folder and specifically BUD-01 and BUD-02 for a detailed explanation of the endpoints

BUDs

• BUD-01: Server requirements and blob retrieval
• BUD-02: Blob upload and management
• BUD-03: User Server List
• BUD-04: Mirroring blobs
• BUD-06: Upload requirements

Event kinds

kind	description	BUD
24242	Authorization event	01
10063	User Server List	03

License

Public domain.