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feat(chat): enable HushChat by default + legacy (non-mnemonic) wallet support

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Flip DRAGONX_ENABLE_CHAT to default ON (a fresh configure now builds chat in),
and make full-node chat work for every wallet + any daemon.

Legacy compat: chat identity is derived from the wallet's mnemonic
(z_exportmnemonic) for a portable, SDXLite-compatible identity — but a legacy
random-seed wallet has no mnemonic, and released daemons don't have that RPC at
all. Provisioning now falls back to a stable z-address's spending key
(z_exportkey) in those cases: a functional, wallet-local identity that works on
any daemon. Since a chat identity is local (peers learn your public key from
your message headers, not your derivation), interop is unaffected; only
cross-client portability needs the mnemonic. The spending key is an in-memory
KDF input over a key the wallet already holds, wiped after use — no new exposure.

Stability: the chosen chat z-address (the reply-to in headers AND the legacy
identity source) is now persisted in settings (chat_reply_zaddr), so the
identity + reply address don't shift when new addresses are generated.
chatReplyZaddr() picks the smallest spendable z-addr once and reuses it.

CLAUDE.md updated to reflect the default flip. Verified: Linux + Windows build
with chat ON, fresh-configure default confirmed ON, ctest 100%, hygiene clean.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
DanS
2026-07-06 22:16:35 -05:00
parent f5bde67f64
commit 6c08a08127
6 changed files with 69 additions and 24 deletions
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2
CMakeLists.txt
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@@ -44,7 +44,7 @@ option(DRAGONX_USE_SYSTEM_SDL3 "Use system SDL3 instead of fetching" ON)
option(DRAGONX_ENABLE_EMBEDDED_DAEMON "Enable embedded dragonxd support" ON)
option(DRAGONX_BUILD_LITE "Build ObsidianDragonLite variant without full-node features" OFF)
option(DRAGONX_ENABLE_LITE_BACKEND "Enable real lite wallet backend integration" OFF)
option(DRAGONX_ENABLE_CHAT "Enable experimental HushChat protocol/UI integration" OFF)
option(DRAGONX_ENABLE_CHAT "Enable the HushChat protocol/UI integration" ON)
set(DRAGONX_LITE_BACKEND_LIBRARY "" CACHE FILEPATH "Path to a prebuilt SDXL-compatible lite backend library")
set(DRAGONX_LITE_BACKEND_INCLUDE_DIR "" CACHE PATH "Optional include directory for SDXL-compatible lite backend headers")
set(DRAGONX_LITE_BACKEND_EXTRA_LIBS "" CACHE STRING "Additional libraries needed by the SDXL-compatible lite backend")