Downgrade to make the app fit on LNS

src_bagl/ui_flow_signMessage.c

@@ -7,13 +7,18 @@ static uint8_t ui_pos;
 
 static void dummy_pre_cb(void) {
     if (ui_pos == UI_191_POS_REVIEW) {
+#ifdef TARGET_NANOS
+        skip_rest_of_message();
+#else
         question_switcher();
+#endif
     } else {
         ux_flow_prev();
         ui_pos = UI_191_POS_REVIEW;
     }
 }
 
+#ifndef TARGET_NANOS
 static void dummy_post_cb(void) {
     if (ui_pos == UI_191_POS_QUESTION) {
         continue_displaying_message();
@@ -22,6 +27,7 @@ static void dummy_post_cb(void) {
         ui_191_switch_to_message_end();
     }
 }
+#endif
 
 // clang-format off
 UX_STEP_NOCB(
@@ -46,6 +52,7 @@ UX_STEP_INIT(
     {
       dummy_pre_cb();
     });
+#ifndef TARGET_NANOS
 UX_STEP_CB(
     ux_191_step_theres_more,
     bn,
@@ -61,6 +68,7 @@ UX_STEP_INIT(
     {
       dummy_post_cb();
     });
+#endif
 UX_STEP_CB(
     ux_191_step_sign,
     pbb,
@@ -85,8 +93,10 @@ UX_FLOW(ux_191_flow,
         &ux_191_step_review,
         &ux_191_step_message,
         &ux_191_step_dummy_pre,
+#ifndef TARGET_NANOS
         &ux_191_step_theres_more,
         &ux_191_step_dummy_post,
+#endif
         &ux_191_step_sign,
         &ux_191_step_cancel);
 
@@ -100,18 +110,22 @@ void ui_191_switch_to_message(void) {
     ui_pos = UI_191_POS_REVIEW;
 }
 
+#ifndef TARGET_NANOS
 void ui_191_switch_to_message_end(void) {
     // Force it to a value that will make it automatically do a prev()
     ui_pos = UI_191_POS_QUESTION;
     ux_flow_init(0, ux_191_flow, &ux_191_step_dummy_pre);
 }
+#endif
 
 void ui_191_switch_to_sign(void) {
     ux_flow_init(0, ux_191_flow, &ux_191_step_sign);
     ui_pos = UI_191_POS_END;
 }
 
+#ifndef TARGET_NANOS
 void ui_191_switch_to_question(void) {
     ux_flow_init(0, ux_191_flow, &ux_191_step_theres_more);
     ui_pos = UI_191_POS_QUESTION;
 }
+#endif

src_features/signMessage/cmd_signMessage.c

@@ -177,13 +177,17 @@ static void feed_display(void) {
                 processed_size += 1;
             } else {
                 // fill the rest of the UI buffer spaces, to consider the buffer full
-                while (remaining_ui_buffer_length()) {
-                    sprintf(remaining_ui_buffer(), " ");
-                }
+                memset(remaining_ui_buffer(), ' ', remaining_ui_buffer_length());
             }
         }
     }
 
+#ifdef TARGET_NANOS
+    if ((remaining_ui_buffer_length() == 0) && (unprocessed_length > 0)) {
+        sprintf(remaining_ui_buffer() - 3, "...");
+    }
+#endif
+
     if ((remaining_ui_buffer_length() == 0) ||
         (tmpCtx.messageSigningContext.remainingLength == 0)) {
         if (!states.ui_started) {
@@ -248,6 +252,7 @@ bool handleSignPersonalMessage(uint8_t p1,
     return true;
 }
 
+#ifndef TARGET_NANOS
 /**
  * Decide whether to show the question to show more of the message or not
  */
@@ -260,6 +265,7 @@ void question_switcher(void) {
         ui_191_switch_to_sign();
     }
 }
+#endif
 
 /**
  * The user has decided to skip the rest of the message
@@ -273,6 +279,7 @@ void skip_rest_of_message(void) {
     }
 }
 
+#ifndef TARGET_NANOS
 /**
  * The user has decided to see the next chunk of the message
  */
@@ -282,3 +289,4 @@ void continue_displaying_message(void) {
         feed_display();
     }
 }
+#endif

tests/zemu/src/eip191.test.js

@@ -56,7 +56,7 @@ nano_models.forEach(function(model) {
 
         if (model.letter == 'S')
         {
-            await sim.navigateAndCompareSnapshots('.', model.name + '_eip191_opensea', [1, 5, 1, 6, 0, 1, -1, 0]);
+            await sim.navigateAndCompareSnapshots('.', model.name + '_eip191_opensea', [1, 5, 1, -1, 0]);
         }
         else
         {