fix beacon: init Ed25519 identity for valid advert signature

src/main.cpp

@@ -351,6 +351,21 @@ void setup() {
 
     fast_rng.begin(radio_driver.getRngSeed());
 
+    {
+        File f = InternalFS.open(IDENTITY_FILE, FILE_O_READ);
+        if (f) {
+            uint8_t buf[PUB_KEY_SIZE + PRV_KEY_SIZE];
+            if (f.read(buf, sizeof(buf)) == sizeof(buf)) the_mesh.self_id.readFrom(buf, sizeof(buf));
+            f.close();
+        } else {
+            the_mesh.self_id = mesh::LocalIdentity(&fast_rng);
+            uint8_t buf[PUB_KEY_SIZE + PRV_KEY_SIZE];
+            the_mesh.self_id.writeTo(buf, sizeof(buf));
+            f = InternalFS.open(IDENTITY_FILE, FILE_O_WRITE);
+            if (f) { f.write(buf, sizeof(buf)); f.close(); }
+        }
+    }
+
     the_mesh.setup_channel();
     the_mesh.begin();
 

src/target.h

@@ -116,6 +116,7 @@
 #define CONFIG_FILE     "/security.cfg"
 #define CHANNEL_FILE    "/channel.cfg"
 #define NAME_FILE       "/name.cfg"
+#define IDENTITY_FILE   "/identity.dat"
 #define WDT_TIMEOUT_MS  10000
 
 #include <RadioLib.h>