Epic: Tagging & Note Discovery

[iAmMichaelConnor]

This refers to the first version of tagging and note discovery, which will:

• not support multiple devices (sending notes from synced devices at the same time will result in index reuse)
• leak a bunch of information to the nodes (as they'll be getting sensitive requests which will link notes with one another and their nullifiers)
• be implemented as part of PXE in TS, though moving it to Noir should just be a matter of translation
• be supported by TXE

Misc

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1. Change partial note delivery to happen in a single log
2. Consider note discovery batched requests #9267
   +0
3. Consider tagging & escrowing #9433
   S-needs-discussion team-fairies +2
4. Deal with reorgs
5. Consider returning dummy address book secret to untrusted contracts
6. Add registerContact command to the CLI wallet #9969
   +0

PXE

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1. PXE Address Book #9263
   C-pxe team-fairies +2
   
2. Compute app-siloed tag secrets via oracles #9378
   C-pxe team-fairies +2
   
3. Fetch PXE app-siloed tag secrets from contract #9365
   C-pxe team-fairies +2
   
4. Update PXE app-siloed tag indices from contract #9368
   C-pxe team-fairies +2
   
5. Tag logs as a sender #9373
   C-aztec.nr C-pxe team-fairies +3
   
6. Find app tagged logs #9380
   C-pxe team-fairies +2
   
7. Add decrypt oracle call #9371
   C-pxe team-fairies +2
   
8. Add notes to DB via oracle call #9370
   C-pxe team-fairies +2
   
9. Remove note processor in favor of new approach #9575
   C-pxe team-fairies +2
   
10. Support forced note-discovery resync #9369
    C-aztec.js C-pxe team-fairies +3
11. Find next tag as sender #9762
    C-aztec.nr C-pxe team-fairies +3
    
12. Use scoped addresses as recipients #9786
    C-pxe team-fairies +2
13. Change tag computation to avoid revealing recipient and senders #9787
    C-aztec.nr C-pxe team-fairies +3
14. Confirm used sender tags #9763
    C-pxe team-fairies +2
15. Move orchestration from TS to Aztec.nr #9576
    C-pxe team-fairies +2
16. Only increase indices if we actually find notes #9953
    C-pxe team-fairies +2

Node

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1. Fetch logs indexed by first field (tag) #9268
   C-node team-fairies +2
   
2. Check if note hashes exist #9577
   C-node team-fairies +2
3. Check if nullifiers exist #9578
   C-node team-fairies +2
4. Add fetch tagged notes oracle to TXE #9579
   C-node team-fairies +2
5. Source tagged logs from both private and public logs #9334
   C-node team-fairies +2
6. Provide a way to limit fetched logs by single tag #9333
   A-security C-node team-fairies +3
7. Consider bundling tx effects in getLogsByTag #9789
   C-node team-fairies +2

Aztec.nr

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1. Trigger note discovery process (via oracle call) #9372
   C-aztec.nr C-pxe team-fairies +3
   
2. Remove contract address from encrypted payload #9580
   C-aztec.nr team-fairies +2
   

[nventuro]

Reorg handling was added in #9913 and #10093.