v0.1.18 - Fixed template-role pubkey caching: re-derive on each concrete path request (nostr_range wildcard was returning the same key for all account indices)

src/main.c

@@ -813,8 +813,8 @@ int socket_name_random(char *out, size_t out_len);
 /* Version information (auto-updated by build/version tooling) */
 #define NSIGNER_VERSION_MAJOR 0
 #define NSIGNER_VERSION_MINOR 1
-#define NSIGNER_VERSION_PATCH 17
-#define NSIGNER_VERSION "v0.1.17"
+#define NSIGNER_VERSION_PATCH 18
+#define NSIGNER_VERSION "v0.1.18"
 
 
 /* NSIGNER_HEADERLESS_DECLS_END */

src/server.c

@@ -2443,12 +2443,19 @@ int server_handle_one(server_ctx_t *ctx, server_activity_cb cb, void *cb_data) {
 
                 if (selector_req.has_role_path) {
                     /* Case (a): client supplied a concrete path that was already
-                     * validated by selector_resolve. Use it directly. */
+                     * validated by selector_resolve. Use it directly.
+                     *
+                     * Always re-derive for template roles: the client may request
+                     * a different concrete path (e.g. a different account index)
+                     * than the one previously derived and cached on the role.
+                     * The derivation block below swaps in the concrete path,
+                     * clears derived/pubkey, re-derives, and restores the
+                     * template — so forcing pending_derivation here is safe and
+                     * correct. Without this, a second request with a different
+                     * path would return the stale cached pubkey from the first. */
                     snprintf(concrete_path, sizeof(concrete_path),
                              "%s", selector_req.role_path);
-                    if (!role->derived) {
-                        pending_derivation = 1;
-                    }
+                    pending_derivation = 1;
                 } else {
                     /* Case (b): role only — resolve index from --index or default */
                     int chosen_index;