* Bound public rate-limit buckets against attacker-keyed growth.
Keep the NIP-13 PoW sender bypass, skip content-bucket minting on
sender reject, and evict idle/oldest entries at a hard cap.
Co-authored-by: Cursor <cursoragent@cursor.com>
* Stop Cashu-looking text from skipping long-message guards.
Oversized public content always collapses and takes the plain
formatting path so remote tokens cannot force layout/regex DoS.
Co-authored-by: Cursor <cursoragent@cursor.com>
* Cap teleported geohash participant markers.
Bound the set with FIFO eviction, clear it on channel switch, and
prune markers that leave the visible participant list.
Co-authored-by: Cursor <cursoragent@cursor.com>
* Bound untrusted Nostr relay frames and event tags.
Reject oversized inbound messages before JSON parse, cap tag
arrays/values at decode, and stop logging raw tag contents.
Co-authored-by: Cursor <cursoragent@cursor.com>
* Fail soft when Noise handshake state is unexpectedly missing.
Replace the initiator startHandshake force unwrap with a guard
that throws invalidState instead of crashing.
Co-authored-by: Cursor <cursoragent@cursor.com>
* Cap geohash nickname cache from remote Nostr events.
FIFO-evict at capacity, clear on channel switch, and prune
nicknames that leave the visible participant list.
Co-authored-by: Cursor <cursoragent@cursor.com>
* Avoid overlapping exclusive access in the rate limiter.
Make bucket helpers static so inout dictionary updates do not
conflict with a mutating call on self.
Co-authored-by: Cursor <cursoragent@cursor.com>
* Fix rate-limiter tests for mutating allow under #expect.
Call allow outside the macro so Swift Testing does not capture an
immutable copy of the struct.
Co-authored-by: Cursor <cursoragent@cursor.com>
* Drop unused WebSocket data helper; reset rate limiter on panic wipe.
dataWithinInboundLimit replaced the unbounded path, and panic clear
should not leave public intake buckets behind.
Co-authored-by: Cursor <cursoragent@cursor.com>
---------
Co-authored-by: Cursor <cursoragent@cursor.com>
* NIP-13 proof-of-work for geohash channels: mine on send, relax rate limits for PoW senders
Outgoing kind-20000 geohash messages mine a NIP-13 nonce tag (8 leading
zero bits, ~256 hashes, typically <1 ms) off the main actor before
signing. Mining is hard-capped at 2 s and cancellable (newer send or
channel switch): on cap/cancel the committed target steps down so the
message still ships promptly with an honest commitment - sending is
never blocked and nothing is dropped. The hot loop serializes the
canonical event once and rewrites only the fixed-width nonce bytes.
Inbound kind-20000 events are scored per NIP-13 commitment semantics
(committed target counts; the ID must actually meet it, extra work
earns nothing) and never hard-rejected: validated PoW >= 8 bits skips
the per-sender rate-limit bucket while the per-content flood bucket
still applies, so old non-mining clients keep working under today's
strict limits while bulk spam gets expensive.
Presence heartbeats (kind 20001), kind-1 notes, and DMs are unchanged;
no UI beyond a pow= field in an existing sampled debug log.
Reimplemented from scratch rather than cherry-picking the stale
feature/pow-geohash-mining-ui branch (unbounded loop, hard receive
filtering, mining UI, XCTest, force unwraps).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
* Geohash: serialize PoW sends so order matches send order
Two location-channel sends back-to-back only cancelled the previous
mining task and started a new one. Cancellation merely *expedites* NIP-13
mining (the target is polled and steps down; it never aborts the send),
so the cancelled task still appended + relayed once mining returned. Both
tasks ran concurrently and the second (shorter to mine) could finish
first, reordering messages in the timeline and on relays.
Chain the mining tasks: each geohash send captures the previous send's
task, cancels it (to expedite, so delays never stack), and awaits its
completion before it echoes and relays. Order is now always send order.
The >2s mining cap is preserved: cancellation expedites the awaited task,
so a send is never blocked beyond NostrPoW.miningTimeCap.
Test: two rapid sends where the first mines longer (larger content) still
land in send order for both the local echo and the relayed events.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
---------
Co-authored-by: jack <jackjackbits@users.noreply.github.com>
Co-authored-by: Claude Fable 5 <noreply@anthropic.com>
