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Logan Johnson ae37ab92f5 fix(nip-ar): resync a sync whose fan-out access check failed
The fan-out access gate fails closed: when a channel visibility or
membership lookup fails, it drops the recipient. For an ordinary
subscription that only loses one live event. For an artifact sync it
loses a change signal, so the sync stays open with a copy that is no
longer exact, and nothing tells the client.

The gate now also reports the recipients it dropped only because a
lookup failed. route_fanout_matches, which every fan-out path (local,
Redis and persistent dispatch) uses, sends CLOSED "resync: access check
failed" to each sync among them. NIP-AR rule 5 lists this loss.

Co-authored-by: Larry <627498bd4bd1f281a16431e3c6cce3b5c25b6692798c78672298aefbf2f8f8b5@buzz.block.builderlab.xyz>
Signed-off-by: Logan Johnson <loganj@squareup.com>
2026-10-29 19:18:32 -04:00
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