- waku/waku_mix/protocol.nim: drop the magic-2 cover-traffic fallback
and the hardcoded 10s epoch. Source cover-traffic totalSlots and
epochDuration from spamProtectionConfig when RLN is on (so cover
emission can't outpace proof minting), and from named waku
constants (WakuCoverTrafficTotalSlots=40, WakuCoverTrafficEpochDuration=60s,
~10 emissions/min/node) when RLN is disabled. Single ConstantRate
CoverTraffic.new call site at the end of the block; the if/else
only sets up spam protection. Addresses PR review comment on
protocol.nim line 102.
- waku.nimble: bump mix-rln plugin to 8ec5dc24 (latest on
feat/cover-traffic-epoch-support: messageId guard + drift-corrected
epoch timer) and pin nim-lsquic to #6d2bc489 (v0.2.0) so libp2p
1.15.3's certificate_ffi keeps finding EVP_PKEY in lsquic_ffi.nim.
- waku/common/option_shims: explain in a header comment that the file
exists because libp2p 1.15.3 dropped Option[T] overloads of
valueOr/withValue from libp2p/utility; can be removed once those are
restored upstream. Addresses PR review comment.
- simulations/mixnet/setup_credentials: drop the unused
SpammerUserMessageLimit constant (the "Higher" comment was wrong
since 3 < DefaultUserMessageLimit=4, and zerokit blocks proof-gen
past the per-user limit anyway, so it could never simulate a
spammer). Addresses PR review comment.
- simulations/mixnet/run_chat_mix{,1}.sh: pass --rln-user-message-limit=4
so the chat client's RLN budget matches the keystores baked at
limit=4, otherwise cover-traffic totalSlots vs RLN-budget mismatch
jams the sim.
Sim verified end-to-end:
- RLN-on (default sim config): PASS, ≥2 proof-verified per node,
cover-traffic metrics non-zero.
- RLN-off (mix nodes only, ad-hoc config): cover-traffic emits at
~13/min/node from the new waku defaults (target ~10/min); the
no-RLN code path is exercised correctly.
- Integrate ConstantRateCoverTraffic from libp2p mix module with default
totalSlots = userMessageLimit (or 2) and 10s epoch
- Add --mix-user-message-limit and --mix-disable-spam-protection CLI flags
with corresponding MixConfBuilder accessors and MixConf fields
- Wrap mixRlnSpamProtection construction so it is skipped when spam
protection is disabled, with a nil guard in setupSpamProtectionCallbacks
- Add waku/common/option_shims.nim restoring valueOr/withValue templates
for std/options (removed upstream by results), and import it across
modules that relied on the old behavior
- Sink chat2mix logs to textlines (stdout) instead of textlines[file] to
work around a chronicles compile-time macro-eval bug under Nim 2.2.4
- Rename ExtendedKademliaDiscoveryParams -> ExtendedServiceDiscoveryParams
to match the kad_disco -> service_discovery rename in nim-libp2p
- Bump nim-libp2p to e1bbda4f6 (PR #2243 "cover traffic with constant
rate") and mix-rln-spam-protection-plugin to 153d0c0 (PR #5 cover
traffic epoch change support); both pre-libp2p_mix-extraction
- Add simulations/mixnet/check_cover_traffic.sh for monitoring
mix_cover_* / mix_slot_* metrics, plus per-node cover-traffic configs
