permissionlesstech/bitchat
1
0
Fork 0
mirror of https://github.com/permissionlesstech/bitchat.git synced 2026-07-27 00:25:22 +00:00
Code Issues Packages Projects Releases Wiki Activity

NIP-13 proof-of-work for geohash channels: mine on send, relax rate limits for PoW senders

Browse Source 
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>
This commit is contained in:
jack
2026-07-06 20:18:00 +02:00
co-authored by Claude Fable 5
parent 7341696280
commit b1ff5e6b82
14 changed files with 769 additions and 126 deletions
Download Patch File Download Diff File Expand all files Collapse all files
bitchatTests/ChatNostrCoordinatorContextTests.swift
+1
View File
@@ -71,6 +71,7 @@ private final class MockChatNostrContext: ChatNostrContext {
private(set) var hapticMessageIDs: [String] = []
func handlePublicMessage(_ message: BitchatMessage) { handledPublicMessages.append(message) }
func handlePublicMessage(_ message: BitchatMessage, powBits: Int) { handledPublicMessages.append(message) }
func checkForMentions(_ message: BitchatMessage) { mentionCheckedMessageIDs.append(message.id) }
func sendHapticFeedback(for message: BitchatMessage) { hapticMessageIDs.append(message.id) }
func parseMentions(from content: String) -> [String] { [] }