f680931c8c
readme: document trust circle design readme: tone down trust circle language to match existing style remove forum_enabled toggle: subscribing IS trusting, no intermediate state
586 lines
25 KiB
Python
586 lines
25 KiB
Python
import json
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import random
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import threading
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import time
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import RNS
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from tinyweb_forum.bloom import BloomFilter
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FORUM_APP = "tinyweb-forum"
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SYNC_INTERVAL = 300
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REQUEST_TIMEOUT = 60
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GOSSIP_FANOUT = 20
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BLOOM_SIZE = 2048
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BLOOM_HASHES = 3
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TAG_BLOOM_SIZE = 2048
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TAG_BLOOM_HASHES = 3
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FILTER_TABLE_GOSSIP = 20
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MAX_PEER_FAILURES = 5
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FILTER_TABLE_TTL_DAYS = 7
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class _ForumAnnounceHandler:
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aspect_filter = FORUM_APP
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receive_path_responses = False
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def __init__(self, fdb, identity):
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self.fdb = fdb
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self.my_hash = identity.hash.hex() if identity else "local"
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def received_announce(self, destination_hash, announced_identity, app_data):
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if announced_identity is None:
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return
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peer_hash = announced_identity.hash.hex()
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if peer_hash and peer_hash != self.my_hash:
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self.fdb.add_known_peer(peer_hash)
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class ForumSync:
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def __init__(self, fdb, identity, reticulum, handlers_ref):
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self.fdb = fdb
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self.identity = identity
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self.reticulum = reticulum
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self.handlers_ref = handlers_ref
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self.destination = None
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self._announce_handler = None
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self._running = False
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self._thread = None
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def _get_subscribed_topics(self):
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raw = self.fdb.get_setting("topic_subscriptions", "")
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return [t.strip().lower() for t in raw.split(",") if t.strip()]
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def _build_tag_bloom(self, topics=None):
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if topics is None:
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topics = self._get_subscribed_topics()
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return BloomFilter.from_tags(topics or [], TAG_BLOOM_SIZE, TAG_BLOOM_HASHES)
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def _topics_overlap(self, my_topics, their_topics):
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if not my_topics or not their_topics:
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return True
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return bool(set(my_topics) & set(their_topics))
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def _topics_overlap_bloom(self, my_topics, peer_bloom):
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"""Check overlap using bloom filter instead of topic list."""
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if not my_topics or peer_bloom is None:
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return True
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return any(peer_bloom.might_contain(t) for t in my_topics)
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def _merge_trust_gossip(self, trust_list, source_hash):
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source_hops = self.fdb.get_trust_hops(source_hash)
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if source_hops is None:
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return
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my_hash = self.identity.hash.hex() if self.identity else "local"
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blocked = set(
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h.strip()
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for h in self.fdb.get_setting("blocked_instances", "").split(",")
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if h.strip()
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)
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for peer_hash in trust_list:
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if peer_hash in blocked or peer_hash == my_hash:
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continue
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new_hops = source_hops + 1
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existing = self.fdb.get_trust_hops(peer_hash)
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if existing is None or new_hops < existing:
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self.fdb.add_trust_source(peer_hash, source_hash, new_hops)
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def start(self):
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self.destination = RNS.Destination(
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self.identity,
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RNS.Destination.IN,
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RNS.Destination.SINGLE,
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FORUM_APP,
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)
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self.destination.register_request_handler(
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"/forum",
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response_generator=self._rns_handler,
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allow=RNS.Destination.ALLOW_ALL,
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)
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self.destination.announce(app_data=FORUM_APP.encode("utf-8"))
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if self.fdb.get_setting("forum_auto_discover", "1") == "1":
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self._enable_announce_handler()
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self._running = True
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if self.fdb.get_setting("forum_auto_sync", "0") == "1":
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self._start_sync_loop()
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def stop(self):
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self._running = False
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self._disable_announce_handler()
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def set_auto_sync(self, enabled):
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self.fdb.set_setting("forum_auto_sync", "1" if enabled else "0")
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if enabled:
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self._start_sync_loop()
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def sync_now(self):
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instances = self.fdb.get_synced_instances()
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random.shuffle(instances)
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count = 0
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my_topics = self._get_subscribed_topics()
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my_tag_bloom = self._build_tag_bloom(my_topics)
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for inst in instances[:GOSSIP_FANOUT]:
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if not self._running:
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break
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pfilter = self.fdb.get_peer_filter(inst["instance_hash"])
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if pfilter:
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pbloom = BloomFilter.from_bytes(pfilter["bloom_bytes"], pfilter["bloom_size"], pfilter["bloom_hashes"])
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if not self._topics_overlap_bloom(my_topics, pbloom):
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continue
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else:
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peer_topics = self._peer_tag_topics(inst["instance_hash"])
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if not self._topics_overlap(my_topics, peer_topics):
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continue
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try:
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self._sync_with(inst["instance_hash"], my_topics, my_tag_bloom)
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count += 1
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except Exception as e:
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self.fdb.record_sync_result(inst["instance_hash"], False)
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print(f"[forum] sync error with {inst['instance_hash'][:16]}: {e}")
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return count
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def scoped_query(self, tag):
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"""Ask known peers if they know anyone with the given tag."""
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tag = tag.strip().lower()
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instances = self.fdb.get_synced_instances()
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random.shuffle(instances)
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results = set()
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for inst in instances[:GOSSIP_FANOUT]:
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if not self._running:
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break
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try:
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matches = self._scoped_query_peer(inst["instance_hash"], tag)
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results.update(matches)
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except Exception:
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continue
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return list(results)
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def _start_sync_loop(self):
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if self._thread and self._thread.is_alive():
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return
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self._thread = threading.Thread(target=self._sync_loop, daemon=True)
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self._thread.start()
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def set_auto_discover(self, enabled):
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self.fdb.set_setting("forum_auto_discover", "1" if enabled else "0")
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if enabled:
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self._enable_announce_handler()
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else:
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self._disable_announce_handler()
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def _enable_announce_handler(self):
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if self._announce_handler is None:
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self._announce_handler = _ForumAnnounceHandler(self.fdb, self.identity)
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RNS.Transport.register_announce_handler(self._announce_handler)
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def _disable_announce_handler(self):
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if self._announce_handler:
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try:
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RNS.Transport.deregister_announce_handler(self._announce_handler)
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except Exception:
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pass
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self._announce_handler = None
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def _rns_handler(self, path, data, request_id, link_id, remote_identity, requested_at):
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if remote_identity:
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data["peer_hash"] = remote_identity.hash.hex()
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return self.handlers_ref().handle_sync(data)
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def _sync_loop(self):
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prune_counter = 0
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while self._running:
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try:
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instances = self.fdb.get_synced_instances()
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my_topics = self._get_subscribed_topics()
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my_tag_bloom = self._build_tag_bloom(my_topics)
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random.shuffle(instances)
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for inst in instances[:GOSSIP_FANOUT]:
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if not self._running:
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break
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pfilter = self.fdb.get_peer_filter(inst["instance_hash"])
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if pfilter:
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pbloom = BloomFilter.from_bytes(pfilter["bloom_bytes"], pfilter["bloom_size"], pfilter["bloom_hashes"])
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if not self._topics_overlap_bloom(my_topics, pbloom):
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continue
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else:
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peer_topics = self._peer_tag_topics(inst["instance_hash"])
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if not self._topics_overlap(my_topics, peer_topics):
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continue
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try:
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self._sync_with(inst["instance_hash"], my_topics, my_tag_bloom)
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except Exception as e:
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self.fdb.record_sync_result(inst["instance_hash"], False)
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print(f"[forum] sync error with {inst['instance_hash'][:16]}: {e}")
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except Exception:
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pass
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prune_counter += 1
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if prune_counter >= 6:
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prune_counter = 0
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try:
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days = int(self.fdb.get_setting("forum_retention_days", "30"))
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self.fdb.prune_old_content(days)
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except Exception:
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pass
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try:
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self.fdb.prune_peer_filters(FILTER_TABLE_TTL_DAYS)
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except Exception:
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pass
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try:
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for dead in self.fdb.get_dead_peers(MAX_PEER_FAILURES):
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self.fdb.remove_synced_instance(dead)
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except Exception:
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pass
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for _ in range(SYNC_INTERVAL):
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if not self._running:
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return
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time.sleep(1)
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def _peer_tag_topics(self, instance_hash):
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raw = self.fdb.get_setting(f"peer_topics_{instance_hash}", "")
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return [t.strip().lower() for t in raw.split(",") if t.strip()] if raw else []
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def _store_peer_filter(self, peer_hash, data):
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tag_bloom_data = data.get("tag_bloom")
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if tag_bloom_data:
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self.fdb.store_peer_filter(
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peer_hash=peer_hash,
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bloom_bytes=bytes(tag_bloom_data),
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bloom_size=data.get("tag_bloom_size", TAG_BLOOM_SIZE),
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bloom_hashes=data.get("tag_bloom_hashes", TAG_BLOOM_HASHES),
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tag_count=len(data.get("peer_topics", [])),
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)
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def _merge_filter_table_gossip(self, filter_table):
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if not filter_table:
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return
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for ph, entry in filter_table.items():
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if isinstance(entry, dict):
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bb = entry.get("bloom_bytes")
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if bb:
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self.fdb.store_peer_filter(
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peer_hash=ph,
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bloom_bytes=bytes(bb) if isinstance(bb, list) else bb,
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bloom_size=entry.get("bloom_size", TAG_BLOOM_SIZE),
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bloom_hashes=entry.get("bloom_hashes", TAG_BLOOM_HASHES),
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tag_count=entry.get("tag_count", 0),
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)
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def _scoped_query_peer(self, peer_hash, tag):
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dest_hash = bytes.fromhex(peer_hash)
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if not RNS.Transport.has_path(dest_hash):
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RNS.Transport.request_path(dest_hash)
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elapsed = 0
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while not RNS.Transport.has_path(dest_hash) and elapsed < 15:
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time.sleep(0.5)
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elapsed += 0.5
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if not RNS.Transport.has_path(dest_hash):
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return []
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server_identity = RNS.Identity.recall(dest_hash)
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if server_identity is None:
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return []
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destination = RNS.Destination(
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server_identity,
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RNS.Destination.OUT,
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RNS.Destination.SINGLE,
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FORUM_APP,
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)
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link = RNS.Link(destination)
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elapsed = 0
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while link.status == RNS.Link.PENDING and elapsed < 15:
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time.sleep(0.25)
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elapsed += 0.25
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if link.status != RNS.Link.ACTIVE:
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return []
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try:
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my_hash = self.identity.hash.hex() if self.identity else "local"
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request_data = {
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"scoped_query": tag,
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"from_hash": my_hash,
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}
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receipt = link.request("/forum", data=request_data, timeout=REQUEST_TIMEOUT)
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elapsed = 0
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done = (RNS.RequestReceipt.READY, RNS.RequestReceipt.DELIVERED, RNS.RequestReceipt.FAILED)
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while receipt.get_status() not in done and elapsed < REQUEST_TIMEOUT:
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time.sleep(0.1)
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elapsed += 0.1
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if receipt.get_status() in (RNS.RequestReceipt.READY, RNS.RequestReceipt.DELIVERED):
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resp = receipt.get_response()
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if isinstance(resp, dict) and resp.get("status") == 200:
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data = json.loads(resp["body"])
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return data.get("scoped_query_results", [])
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return []
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finally:
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link.teardown()
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def _sync_with(self, instance_hash, my_topics=None, my_tag_bloom=None):
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success = False
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dest_hash = bytes.fromhex(instance_hash)
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if not RNS.Transport.has_path(dest_hash):
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RNS.Transport.request_path(dest_hash)
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elapsed = 0
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while not RNS.Transport.has_path(dest_hash) and elapsed < 15:
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time.sleep(0.5)
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elapsed += 0.5
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if not RNS.Transport.has_path(dest_hash):
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self.fdb.record_sync_result(instance_hash, False)
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return
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server_identity = RNS.Identity.recall(dest_hash)
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if server_identity is None:
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self.fdb.record_sync_result(instance_hash, False)
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return
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destination = RNS.Destination(
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server_identity,
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RNS.Destination.OUT,
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RNS.Destination.SINGLE,
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FORUM_APP,
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)
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link = RNS.Link(destination)
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elapsed = 0
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while link.status == RNS.Link.PENDING and elapsed < 15:
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time.sleep(0.25)
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elapsed += 0.25
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if link.status != RNS.Link.ACTIVE:
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self.fdb.record_sync_result(instance_hash, False)
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return
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try:
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inst = self.fdb.get_synced_instances()
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last_sync = ""
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for s in inst:
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if s["instance_hash"] == instance_hash:
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last_sync = s["last_sync"] or ""
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break
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since = last_sync.replace(" ", "T") if last_sync else ""
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my_hash = self.identity.hash.hex() if self.identity else "local"
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if my_topics is None:
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my_topics = self._get_subscribed_topics()
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if my_tag_bloom is None:
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my_tag_bloom = self._build_tag_bloom(my_topics)
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# Build filter table gossip: share a subset of our known peer filters
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all_filters = self.fdb.get_all_filters()
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filter_table_gossip = {}
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for f in all_filters[:FILTER_TABLE_GOSSIP]:
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if f["peer_hash"] != instance_hash and f["peer_hash"] != my_hash:
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filter_table_gossip[f["peer_hash"]] = {
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"bloom_bytes": list(f["bloom_bytes"]),
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"bloom_size": f["bloom_size"],
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"bloom_hashes": f["bloom_hashes"],
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"tag_count": f["tag_count"],
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}
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threads, posts = [], []
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upvotes = []
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my_tag_cloud = self.fdb.get_tag_cloud(50)
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my_tag_list = [t for t, _ in my_tag_cloud]
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# Only build content if we have a since timestamp (incremental sync)
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if since:
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if my_topics:
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rows = self.fdb.get_threads_by_topics(my_topics, since=since)
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threads = [dict(r) for r in rows]
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tids = [r["id"] for r in rows]
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posts = [dict(p) for p in self.fdb.get_posts_by_thread_ids(tids)]
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uv_rows = self.fdb.get_new_upvotes_since(since, tids)
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upvotes = [{"thread_id": tid, "instance_hash": instance_hash} for tid in uv_rows]
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else:
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ts, ps, uv = self.fdb.get_new_content(since)
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threads = [dict(r) for r in ts]
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posts = [dict(r) for r in ps]
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upvotes = [{"thread_id": tid, "instance_hash": instance_hash} for tid in uv]
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# Build content bloom for dedup
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existing_ids = set(t["id"] for t in threads)
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for t in self.fdb.get_threads_by_topics(my_topics) if my_topics else []:
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existing_ids.add(t["id"])
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content_bloom = BloomFilter.from_items(list(existing_ids), BLOOM_SIZE, BLOOM_HASHES)
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my_blocks = [h.strip() for h in self.fdb.get_setting("blocked_instances", "").split(",") if h.strip()]
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my_peer_blocks = self.fdb.get_peer_block_list()
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retracted = [{"id": cid, "type": ct, "author": ai, "at": ra}
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for cid, ct, ai, ra in self.fdb.get_raw_retractions()]
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known_peers = [h for h in self.fdb.get_all_known_hashes() if h != instance_hash and h != my_hash]
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peer_topics_map = {}
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for ph in known_peers[:100]:
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pt = self.fdb.get_setting(f"peer_topics_{ph}", "")
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if pt:
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peer_topics_map[ph] = [t.strip() for t in pt.split(",") if t.strip()]
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request_data = {
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"query": {"since": [since]} if since else {},
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"threads": threads,
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"posts": posts,
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"upvotes": upvotes,
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"from_hash": my_hash,
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"blocks": {"mine": my_blocks, "peers": my_peer_blocks},
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"retractions": retracted,
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"known_peers": known_peers,
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"my_topics": my_topics,
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"my_tag_cloud": my_tag_cloud,
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"content_bloom": list(content_bloom.bytes),
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"bloom_size": BLOOM_SIZE,
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"bloom_hashes": BLOOM_HASHES,
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"peer_topics_map": peer_topics_map,
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# Architecture B additions
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"tag_bloom": list(my_tag_bloom.bytes),
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"tag_bloom_size": TAG_BLOOM_SIZE,
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"tag_bloom_hashes": TAG_BLOOM_HASHES,
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"filter_table": filter_table_gossip,
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"trust_list": self.fdb.get_all_trusted_hashes(),
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}
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receipt = link.request("/forum", data=request_data, timeout=REQUEST_TIMEOUT)
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elapsed = 0
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done = (RNS.RequestReceipt.READY, RNS.RequestReceipt.DELIVERED, RNS.RequestReceipt.FAILED)
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while receipt.get_status() not in done and elapsed < REQUEST_TIMEOUT:
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time.sleep(0.1)
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elapsed += 0.1
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if receipt.get_status() in (RNS.RequestReceipt.READY, RNS.RequestReceipt.DELIVERED):
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resp = receipt.get_response()
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if isinstance(resp, dict) and resp.get("status") == 200:
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try:
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data = json.loads(resp["body"])
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except (json.JSONDecodeError, KeyError):
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data = {}
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success = True
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|
# Store peer's tag bloom filter
|
|
self._store_peer_filter(instance_hash, data)
|
|
|
|
# Merge filter table gossip from peer
|
|
self._merge_filter_table_gossip(data.get("filter_table", {}))
|
|
|
|
# Store peer topics (backward compat)
|
|
peer_topics = data.get("peer_topics", [])
|
|
if peer_topics:
|
|
self.fdb.set_setting(f"peer_topics_{instance_hash}", ",".join(peer_topics))
|
|
peer_tag_cloud = data.get("peer_tag_cloud", [])
|
|
if peer_tag_cloud:
|
|
self.fdb.set_setting(f"peer_tag_cloud_{instance_hash}", json.dumps(peer_tag_cloud))
|
|
|
|
# Check tag overlap using bloom filter
|
|
my_blocks = set(h.strip() for h in self.fdb.get_setting("blocked_instances", "").split(",") if h.strip())
|
|
|
|
peer_tag_bloom_data = data.get("tag_bloom")
|
|
peer_tag_bloom = None
|
|
if peer_tag_bloom_data:
|
|
peer_tag_bloom = BloomFilter.from_bytes(
|
|
bytes(peer_tag_bloom_data),
|
|
data.get("tag_bloom_size", TAG_BLOOM_SIZE),
|
|
data.get("tag_bloom_hashes", TAG_BLOOM_HASHES),
|
|
)
|
|
|
|
# If no tag overlap, skip content sync but still store the filter
|
|
if my_topics and peer_tag_bloom is not None:
|
|
if not self._topics_overlap_bloom(my_topics, peer_tag_bloom):
|
|
success = True
|
|
now = time.strftime("%Y-%m-%dT%H:%M:%S")
|
|
self.fdb.set_last_sync(instance_hash, now)
|
|
self.fdb.record_sync_result(instance_hash, True)
|
|
return
|
|
|
|
# Fall back to topic list overlap check if no bloom
|
|
if peer_tag_bloom is None:
|
|
incoming_topics = data.get("peer_topics", [])
|
|
if my_topics and incoming_topics:
|
|
if not self._topics_overlap(my_topics, incoming_topics):
|
|
success = True
|
|
now = time.strftime("%Y-%m-%dT%H:%M:%S")
|
|
self.fdb.set_last_sync(instance_hash, now)
|
|
self.fdb.record_sync_result(instance_hash, True)
|
|
return
|
|
|
|
# Merge trust gossip from peer
|
|
self._merge_trust_gossip(data.get("trust_list", []), instance_hash)
|
|
|
|
# Check content bloom for dedup
|
|
peer_bloom_data = data.get("content_bloom")
|
|
peer_bloom = None
|
|
if peer_bloom_data:
|
|
peer_bloom = BloomFilter.from_bytes(
|
|
bytes(peer_bloom_data),
|
|
data.get("bloom_size", BLOOM_SIZE),
|
|
data.get("bloom_hashes", BLOOM_HASHES),
|
|
)
|
|
|
|
for t in data.get("threads", []):
|
|
author = t.get("author_instance", "")
|
|
if author in my_blocks:
|
|
continue
|
|
if author and not self.fdb.is_trusted(author):
|
|
continue
|
|
if peer_bloom and peer_bloom.might_contain(t["id"]):
|
|
continue
|
|
if not my_topics:
|
|
self.fdb.merge_thread(t)
|
|
else:
|
|
t_tags = [tag.strip().lower() for tag in t.get("tags", "").split(",") if tag.strip()]
|
|
if set(my_topics) & set(t_tags):
|
|
self.fdb.merge_thread(t)
|
|
for p in data.get("posts", []):
|
|
author = p.get("author_instance", "")
|
|
if author in my_blocks:
|
|
continue
|
|
if author and not self.fdb.is_trusted(author):
|
|
continue
|
|
if peer_bloom and peer_bloom.might_contain(p["id"]):
|
|
continue
|
|
self.fdb.merge_post(p)
|
|
for tid in data.get("upvote_threads", []):
|
|
self.fdb.merge_upvote(tid, instance_hash)
|
|
|
|
peer_blocks = data.get("blocks", {})
|
|
for h in peer_blocks.get("mine", []):
|
|
if h and h not in my_blocks and instance_hash:
|
|
self.fdb.record_peer_block(instance_hash, h)
|
|
for h in peer_blocks.get("peers", []):
|
|
if h and h not in my_blocks and instance_hash:
|
|
self.fdb.record_peer_block(instance_hash, h)
|
|
self._apply_peer_blocks()
|
|
|
|
for r in data.get("retractions", []):
|
|
if r.get("id") and r.get("type") and r.get("author") and r.get("at"):
|
|
self.fdb.merge_retraction(r["id"], r["type"], r["author"], r["at"])
|
|
|
|
for peer_hash in data.get("known_peers", []):
|
|
if peer_hash and peer_hash != my_hash and peer_hash != instance_hash:
|
|
self.fdb.add_known_peer(peer_hash)
|
|
|
|
my_topics_set = set(my_topics)
|
|
for ph, pt in data.get("peer_topics_map", {}).items():
|
|
if ph and ph != my_hash and ph != instance_hash:
|
|
pt_set = set(t.lower() for t in pt)
|
|
if not my_topics or my_topics_set & pt_set:
|
|
self.fdb.add_known_peer(ph)
|
|
|
|
now = time.strftime("%Y-%m-%dT%H:%M:%S")
|
|
self.fdb.set_last_sync(instance_hash, now)
|
|
self.fdb.record_sync_result(instance_hash, success)
|
|
finally:
|
|
link.teardown()
|
|
|
|
def _apply_peer_blocks(self):
|
|
counts = self.fdb.get_peer_block_counts()
|
|
blocked = set(h.strip() for h in self.fdb.get_setting("blocked_instances", "").split(",") if h.strip())
|
|
auto_blocked = set(h.strip() for h in self.fdb.get_setting("auto_blocked_instances", "").split(",") if h.strip())
|
|
changed = False
|
|
for h, count in counts.items():
|
|
if h not in blocked and h not in auto_blocked and count >= 3:
|
|
blocked.add(h)
|
|
auto_blocked.add(h)
|
|
self.fdb.remove_by_hash(h)
|
|
changed = True
|
|
if changed:
|
|
self.fdb.set_setting("blocked_instances", ",".join(blocked))
|
|
self.fdb.set_setting("auto_blocked_instances", ",".join(auto_blocked))
|
|
|
|
def handle_sync(self, data):
|
|
return self.handlers_ref().handle_sync_request(data)
|