feat(pow): apply WoT-distance-based PoW reductions - #779
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Signed-off-by: Priyanshubhartistm <bhartipriyanshustm@gmail.com>
Signed-off-by: Priyanshubhartistm <bhartipriyanshustm@gmail.com>
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Description
nostream now has a Web of Trust graph exposing a distance-lookup API, and a relay-load-aware adaptive PoW pipeline that scales the required eventId difficulty with observed event rate. The two didn't talk to each other every pubkey faced the same computed difficulty regardless of how trusted it is.
This wires the WoT graph into the adaptive PoW pipeline via
limits.event.pow.wotThresholds: an ordered list of{ maxDistance, difficultyFactor }entries. The eligible threshold with the smallestmaxDistanceapplies, scaling the computed difficulty bydifficultyFactor(0 bypasses eventId PoW entirely, 1 requires the full computed difficulty, fractional values in between). A pubkey outside the trust graph, or beyond every configured threshold, always pays the fullcomputed difficulty. Disabled by default (no thresholds configured), and only ever consults the WoT graph when at least one threshold is configured, so relays not using this stay unaffected.
EventMessageHandler.canAcceptEvent()is nowasyncto support the distance lookup every other check inhandleMessage's chain was already async, so this keeps the same style rather than special-casing one synchronous check.Related Issue
Closes #778
Motivation and Context
A fixed adaptive difficulty treats a well-connected community member the same as a completely unknown pubkey under load. Reducing (or waiving) the PoW requirement for pubkeys inside the operator's trust circle means a trusted author can keep posting instantly during a spam flood, while an unknown pubkey still has to prove it isn't a bot.