docs(anoncomms): claim cover slots for SURB reply origination - #418
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chaitanyaprem wants to merge 2 commits into
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docs(anoncomms): claim cover slots for SURB reply origination#418chaitanyaprem wants to merge 2 commits into
chaitanyaprem wants to merge 2 commits into
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SURB replies are origination at the exit: they consume from R and raise C*L by up to n replies per request. On slot exhaustion they queue for the next epoch, same as locally originated send.
… delay The fallback caveat described sequential composition (delay, then build), which shifts fallback emissions by the full generation time and leaks pre-computation load. Generation now SHOULD run concurrently with the delay; §6.2 step 3 gains the on-demand path; §5.3 allows offering the discarded packet's message identifier for reclaim.
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Follow-up to logos-co/nim-libp2p-mix#40 review (cc @AkshayaMani).
Cover traffic listed three slot consumers: cover, local send, forwarding. SURB replies are origination at the exit and were missing.
mix-cover-traffic.md (LIP-161)
Cis cover + local send + replies. SameC + C·L ≤ Rbound. A busy exit may originate up tonreplies per request, so relative to request origination bothCandC·Lscale by up to(1 + n).ClaimSlot()before the SURB first-hop write. On failure, queue for the next epoch (same as local send). Forwards still drop.k * P.kis not fixed here; it needs a value large enough that a reply queued for the next epoch still arrives while credentials are live.mix.md §8.7.3 cross-ref is not in this PR.
Will collide with #341 on §4 / §5.2. Branched from master on purpose.
nim-libp2p-mix#40 currently drops on exhaustion; the impl should queue to match this.
Also overlaps on-demand cover generation with the pre-send delay (§6.1 fallback caveat, §6.2 step 3, §5.3 reclaim) — spec side of nim-libp2p-mix#52.