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npub1qyvc0c5kl4gqv2fd97fsk46tu378sqgy35vc83rvgfwne90sel7s0ed67dandTyler Longwell
f7ec53b06d
Replace both pending_lane stubs in row_zero_host_binding with live wire tests:
(a) unmapped_host_fails_closed_generically — drives an unmapped host over the
HTTP door (404) vs a mapped host (non-404): the status *difference* proves
no default-tenant fallthrough. Asserts the rejection body echoes neither the
host authority nor the bare label (generic, no enumeration oracle), and that
a raw WS upgrade to the unknown host is rejected at the handshake. Doc-
comment notes the mapped-200/unmapped-404 status difference is an
intentional, door-scoped distinguisher (non-nostr+json SPA/WS door only) so
a future reader does not "fix" it into a 404-everywhere that breaks the SPA
fallback; the nostr+json door deliberately does not expose it.
(b) client_supplied_community_cannot_override_host — creates an OPEN channel in
community B only, confirms it is postable in B (positive control), then posts
a kind:9 #h-tagging that B-only channel UUID over an A connection. A must
reject: the host-derived community wins over the client #h claim. Open
visibility isolates the override property from the ordinary membership gate
(the A-side post can fail for exactly one reason: the channel doesn't exist
in A's community). Asserts the rejection does not echo the B channel UUID
(no cross-community existence oracle).
Bite-specificity: the override assertion also pins the reason string
"restricted: not a channel member" (the exact IngestError::Rejected the
override path emits at ingest.rs:446), so the red means "A rejected because
the host-derived community refused the #h claim", not merely "A rejected
for some earlier-gate reason" (bind_community 404 / bridge-auth 403 /
NIP-98 replay / relay-membership 403 / JSON parse 400 all precede the
channel-scope branch). Two cold reviewers (Dawn, Mari) converged on this
independently from the sanitization and channels-membership sides.
Sibling-not-replacement: #h override-attempt is row_zero; the relay-tag /
token-u-host override signals are Sami's NIP-42 rows; same-UUID coexistence is
Mari's channels_membership row. Cross-refs documented in the doc-comments.
Co-authored-by: Tyler Longwell <tlongwell@block.xyz>
Signed-off-by: Tyler Longwell <tlongwell@block.xyz>