A raw file, referenced by the hash of its contents (e.g.
&sBLBniEQc7vkiEQ90wpD/YmwM8om70VSPI3LnOrKz2Y=.sha256). In Scuttlebutt all attachments, such as images, videos, PDFs, etc, are currently stored as blobs and handled by the "blob store".
A link to some content in Scuttlebutt, either an account (
@...), a blob (
&...), or a message (
Remote Process Call — a way to instruct a program at a distance to execute a particular function.