An opt-in "internet gateway" toggle lets one connected phone bridge the
local geohash channel for mesh-only peers: signed kind-20000 events ride
a new nostrCarrier (0x28) packet — directed to the gateway for uplink,
broadcast with TTL for downlink — with Schnorr verification at every
hop, CourierStore-style quotas, and explicit loop-prevention rules.
- BitFoundation: MessageType.nostrCarrier = 0x28
- NostrCarrierPacket: 2-byte-length TLV codec (direction, geohash,
signed event JSON), 16 KiB cap, tolerant decoder
- GatewayService: closure-injected policy layer — verify gates (sig,
kind, #g tag, age, size), uplink quotas (10/min/depositor rate limit,
offline queue of 20 total / 5 per depositor, drop-oldest, flush on
reconnect), downlink budget (30/min, bounded drop-oldest backlog),
bounded loop-prevention ID sets
- BLEService: runtime capability bits (advertise .gateway only while
the toggle is on, re-announce on change), signed directed uplink
sends, carrier ingress with depositor signature verification
- Mesh-only senders uplink automatically from sendGeohash when no relay
is connected and a reachable peer advertises .gateway; once-per-
channel "sent via mesh gateway" notice
- UI: gateway toggle beside the Tor toggle, globe header indicator,
VoiceOver labels, xcstrings entries
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
