fix(core): don't use 'static lifetime for BLEEvent

[no changelog]

core/embed/rust/src/ui/api/firmware_micropython.rs

@@ -1068,7 +1068,7 @@ pub static mp_module_trezorui_api: Module = obj_module! {
     ///     def usb_event(self, connected: bool) -> LayoutState | None:
     ///         """Receive a USB connect/disconnect event."""
     ///
-    ///     def ble_event(self, event: tuple[int, bytes]) -> LayoutState | None:
+    ///     def ble_event(self, event: tuple[int, int | None]) -> LayoutState | None:
     ///         """Receive a BLE event."""
     ///
     ///     def timer(self, token: int) -> LayoutState | None:

core/embed/rust/src/ui/event/ble.rs

@@ -5,18 +5,18 @@ use crate::error::Error;
 pub enum BLEEvent {
     Connected,
     Disconnected,
-    PairingRequest(&'static [u8]),
+    PairingRequest(u32),
     PairingCanceled,
 }
 
 impl BLEEvent {
-    pub fn new(event: u32, data: &'static [u8]) -> Result<Self, Error> {
-        let result = match event {
-            1 => Self::Connected,
-            2 => Self::Disconnected,
-            3 => Self::PairingRequest(data),
-            4 => Self::PairingCanceled,
-            _ => return Err(Error::OutOfRange),
+    pub fn new(event: u32, data: Option<u32>) -> Result<Self, Error> {
+        let result = match (event, data) {
+            (1, None) => Self::Connected,
+            (2, None) => Self::Disconnected,
+            (3, Some(code)) => Self::PairingRequest(code),
+            (4, None) => Self::PairingCanceled,
+            _ => return Err(Error::ValueError(c"Invalid BLE event")),
         };
         Ok(result)
     }

core/embed/rust/src/ui/layout/obj.rs

@@ -11,8 +11,6 @@ use crate::ui::{event::TouchEvent, geometry::Direction};
 #[cfg(feature = "touch")]
 use num_traits::ToPrimitive;
 
-#[cfg(feature = "ble")]
-use crate::micropython::buffer::get_buffer;
 #[cfg(feature = "ble")]
 use crate::ui::event::BLEEvent;
 
@@ -545,11 +543,7 @@ extern "C" fn ui_layout_ble_event(n_args: usize, args: *const Obj) -> Obj {
         }
         let this: Gc<LayoutObj> = args[0].try_into()?;
 
-        let data = unsafe { get_buffer(args[2]) };
-
-        let data = unwrap!(data);
-
-        let event = BLEEvent::new(args[1].try_into()?, data)?;
+        let event = BLEEvent::new(args[1].try_into()?, args[2].try_into_option()?)?;
         let msg = this.inner_mut().obj_event(Event::BLE(event))?;
         Ok(msg)
     };

core/embed/upymod/modtrezorio/modtrezorio-poll.h

@@ -48,6 +48,31 @@
 
 extern uint32_t last_touch_sample_time;
 
+#ifdef USE_BLE
+
+static mp_obj_t parse_ble_event_data(const ble_event_t *event) {
+  if (event->data_len == 0) {
+    return mp_const_none;
+  }
+  if (event->type != BLE_PAIRING_REQUEST) {
+    return mp_const_none;
+  }
+  // Parse pairing code
+  _Static_assert(sizeof(event->data) <= 6);
+  uint32_t code = 0;
+  for (int i = 0; i < event->data_len; ++i) {
+    uint8_t byte = event->data[i];
+    if (byte >= '0' && byte <= '9') {
+      code = 10 * code + (byte - '0');
+    } else {
+      mp_raise_ValueError("Invalid pairing code");
+    }
+  }
+  return mp_obj_new_int_from_uint(code);
+}
+
+#endif
+
 /// package: trezorio.__init__
 
 /// def poll(ifaces: Iterable[int], list_ref: list, timeout_ms: int) -> bool:
@@ -208,13 +233,9 @@ STATIC mp_obj_t mod_trezorio_poll(mp_obj_t ifaces, mp_obj_t list_ref,
         ble_event_t event = {0};
         bool read = ble_get_event(&event);
         if (read) {
-          mp_obj_t data = mp_const_empty_bytes;
-          if (event.data_len > 0) {
-            data = mp_obj_new_bytes(event.data, event.data_len);
-          }
           mp_obj_tuple_t *tuple = MP_OBJ_TO_PTR(mp_obj_new_tuple(2, NULL));
           tuple->items[0] = MP_OBJ_NEW_SMALL_INT(event.type);
-          tuple->items[1] = data;
+          tuple->items[1] = parse_ble_event_data(&event);
           ret->items[0] = MP_OBJ_NEW_SMALL_INT(i);
           ret->items[1] = MP_OBJ_FROM_PTR(tuple);
           return mp_const_true;

core/mocks/generated/trezorui_api.pyi

@@ -26,7 +26,7 @@ class LayoutObj(Generic[T]):
         """Receive a progress event."""
     def usb_event(self, connected: bool) -> LayoutState | None:
         """Receive a USB connect/disconnect event."""
-    def ble_event(self, event: tuple[int, bytes]) -> LayoutState | None:
+    def ble_event(self, event: tuple[int, int | None]) -> LayoutState | None:
         """Receive a BLE event."""
     def timer(self, token: int) -> LayoutState | None:
         """Callback for the timer set by `attach_timer_fn`.