Description:

When parsing NIP-10 e-tags, NoteIdRef currently exposes:

• id - event ID
• relay - relay hint
• marker - root/reply/mention

Per NIP-10, the full e-tag format includes an optional 5th element for the referenced event's author pubkey:
["e", , , , ]

Current behavior:

NoteReply::root()and NoteReply::reply() return NoteIdRef without access to the pubkey, even when it exists in the original tag.

Requested behavior:

Add an optional pubkey field to NoteIdRef:

 pub struct NoteIdRef<'a> { pub index: u16, pub id: &'a [u8; 32], pub relay: Option<&'a str>, pub marker: Option<&'a str>, pub pubkey: Option<&'a [u8; 32]>, // NEW } 

Use case:
When creating reply notes, clients should preserve the root author pubkey if it was present in the original thread. Currently notedeck cannot do this because NoteIdRef doesn't expose it.

 // Current: cannot include root author pubkey ["e", "<root-id>", "<relay>", "root"] // Desired per NIP-10: ["e", "<root-id>", "<relay>", "root", "<root-author-pubkey>"] 

Reference:

• NIP-10: https://github.com/nostr-protocol/nips/blob/master/10.md
• notedeck relay hints PR: pending