fix(mix): pin logos-delivery clientMode mount + enable clientMode

Bump vendor/nwaku to 4a3db364 (feat/logos-testnetv02-mix) so
mountKademlia skips switch.mount when client=true. Enable clientMode
and disable XPR publish for fleet mix discovery (lookup-only). Link
mix librln in make tests so smoke_test links on Darwin.

.gitmodules

@@ -5,7 +5,7 @@
 	path = vendor/nwaku
 	url = https://github.com/logos-messaging/logos-delivery.git
 	ignore = untracked
-	branch = feat/cover-traffic
+	branch = feat/logos-testnetv02-mix
 [submodule "vendor/nim-protobuf-serialization"]
 	path = vendor/nim-protobuf-serialization
 	url = https://github.com/status-im/nim-protobuf-serialization.git

Makefile

@@ -136,9 +136,11 @@ build-waku-nat:
 	@echo "Completed building nat-libs"
 
 .PHONY: tests
-tests: | build-rust-bundle build-waku-nat logos_chat.nims
+# smoke_test / all_tests pull mix + RLN symbols via waku_client; link mix librln
+# the same way liblogoschat / examples do (cdylib on Darwin).
+tests: | build-rust-bundle build-waku-nat mix-librln logos_chat.nims
 	echo -e $(BUILD_MSG) "build/$@" && \
-		$(ENV_SCRIPT) nim tests $(NIM_PARAMS) \
+		$(ENV_SCRIPT) nim tests $(NIM_PARAMS) $(MIX_LIBRLN_NIM_PARAMS) \
 		--passL:$(RUST_BUNDLE_LIB) --passL:-lm \
 		logos_chat.nims
 

flake.nix

@@ -26,9 +26,9 @@
         };
         libchatDrv = pkgs.callPackage ./nix/libchat.nix {};
         rustBundleDrv  = pkgs.callPackage ./nix/rust_bundle.nix { src = self; };
-        # efafdfdc2's nwaku consumes its nim deps via nimble (nimbledeps/pkgs2),
-        # which isn't reproducible in the nix sandbox. Instead fetch them from
-        # vendor/nwaku's autogenerated deps.nix (mirrors logos-delivery's build).
+        # vendor/nwaku (logos-delivery) consumes its nim deps via nimble
+        # (nimbledeps/pkgs2), which isn't reproducible in the nix sandbox.
+        # Instead fetch them from vendor/nwaku's autogenerated deps.nix.
         nwakuDeps = import (self + "/vendor/nwaku/nix/deps.nix") { inherit pkgs; };
       in {
         packages.default = pkgs.callPackage ./nix/default.nix {

nix/default.nix

@@ -1,7 +1,7 @@
 { lib, stdenv, nim, which, pkg-config, writeScriptBin, fetchurl,
   openssl, miniupnpc, libnatpmp, rustPlatform, fetchFromGitHub, darwin ? {},
   src,         # logos-chat source (self from flake, with submodules=1)
-  nwakuDeps,   # efafdfdc2 nim deps from vendor/nwaku/nix/deps.nix
+  nwakuDeps,   # nim deps from vendor/nwaku/nix/deps.nix (logos-delivery pin)
   rustBundleDrv }:  # result of rust_bundle.nix
 
 # NOTE: this build requires git submodules to be present in src.
@@ -15,8 +15,8 @@ assert lib.assertMsg ((src.submodules or false) == true)
 let
   revision = lib.substring 0 8 (src.rev or "dirty");
 
-  # nwaku (efafdfdc2) nim deps on the path. Drop `ffi` — the chat ships its own
-  # vendor/nim-ffi (1-arg declareLibrary); nwaku's ffi (2-arg) would clash.
+  # nwaku (logos-delivery pin) nim deps on the path. Drop `ffi` — the chat ships
+  # its own vendor/nim-ffi (1-arg declareLibrary); nwaku's ffi (2-arg) would clash.
   nwakuDepPaths = lib.concatStringsSep " " (builtins.concatMap
     (p: [ "--path:${p}" "--path:${p}/src" ])
     (builtins.attrValues (builtins.removeAttrs nwakuDeps [ "ffi" ])));

src/chat/delivery/waku_client.nim

@@ -346,6 +346,13 @@ proc start*(client: WakuClient) {.async.} =
     # conf-driven factory that would otherwise auto-mount it (mirrors apps/chat2mix).
     # Discovered mix peers land in the peerManager and fill the pool waitForMixPool
     # waits on.
+    #
+    # Light-client mix discovery: LOOK UP mix providers only.
+    # - servicesToDiscover = MixProtocolID (find fleet mix nodes)
+    # - servicesToAdvertise = empty (do NOT advertise as mix)
+    # - xprPublishing = false (do NOT publish self-signed XPR into the DHT)
+    # - clientMode = true (no inbound DHT handler / codec; logos-delivery
+    #   mountKademlia skips switch.mount for clientMode as of 4a3db364)
     if client.cfg.kadBootstrapNodes.len > 0:
       var kadBootstrapPeers: seq[(PeerId, seq[MultiAddress])]
       for nodeStr in client.cfg.kadBootstrapNodes:
@@ -368,13 +375,13 @@ proc start*(client: WakuClient) {.async.} =
             # via maintainBuckets + runServiceLookupLoop + runServicePeerTopUp.
             kadDhtConfig: KadDHTConfig.new(disableBootstrapping = true),
             discoConfig: sd_types.ServiceDiscoveryConfig.new(),
-            clientMode: false,
-            xprPublishing: true,
+            clientMode: true,
+            xprPublishing: false,
           )
         ).isOkOr:
           error "Failed to mount kademlia mix discovery", error = error
           quit(QuitFailure)
-        info "Kademlia mix discovery mounted",
+        info "Kademlia mix discovery mounted (clientMode, no XPR/advertise)",
           bootstrapPeers = kadBootstrapPeers.len
 
     asyncSpawn client.waitForMixPool()

vendor/nwaku

@@ -1 +1 @@
-Subproject commit efafdfdc24f369942951dd7ceeec37e5913b19eb
+Subproject commit 4a3db364e7e90bc7fdfdd1eb7caa30fa7130d220