feat(legacy): Show "signature is valid" dialog when VerifyMessage succeeds.

legacy/firmware/.changelog.d/1880.added

@@ -0,0 +1 @@
+Show "signature is valid" dialog when VerifyMessage succeeds.

legacy/firmware/fsm_msg_coin.h

@@ -343,6 +343,14 @@ void fsm_msgVerifyMessage(const VerifyMessage *msg) {
       return;
     }
 
+    layoutDialogSwipe(&bmp_icon_ok, NULL, _("Continue"), NULL, NULL,
+                      _("The signature is valid."), NULL, NULL, NULL, NULL);
+    if (!protectButton(ButtonRequestType_ButtonRequest_Other, true)) {
+      fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
+      layoutHome();
+      return;
+    }
+
     fsm_sendSuccess(_("Message verified"));
   } else {
     fsm_sendFailure(FailureType_Failure_DataError, _("Invalid signature"));

legacy/firmware/fsm_msg_ethereum.h

@@ -204,6 +204,14 @@ void fsm_msgEthereumVerifyMessage(const EthereumVerifyMessage *msg) {
     return;
   }
 
+  layoutDialogSwipe(&bmp_icon_ok, NULL, _("Continue"), NULL, NULL,
+                    _("The signature is valid."), NULL, NULL, NULL, NULL);
+  if (!protectButton(ButtonRequestType_ButtonRequest_Other, true)) {
+    fsm_sendFailure(FailureType_Failure_ActionCancelled, NULL);
+    layoutHome();
+    return;
+  }
+
   fsm_sendSuccess(_("Message verified"));
 
   layoutHome();

tests/device_tests/test_protection_levels.py

@@ -300,6 +300,7 @@ def test_verify_message_t1(client: Client):
     with client:
         client.set_expected_responses(
             [
+                messages.ButtonRequest,
                 messages.ButtonRequest,
                 messages.ButtonRequest,
                 messages.Success,