feat(core/rust/ui): on-the-fly conversion of bytes to hexadecimal representation

[no changelog]

core/embed/rust/build.rs

@@ -168,6 +168,9 @@ fn generate_micropython_bindings() {
         .allowlist_var("MP_BUFFER_WRITE")
         .allowlist_var("MP_BUFFER_RW")
         .allowlist_var("mp_type_str")
+        .allowlist_var("mp_type_bytes")
+        .allowlist_var("mp_type_bytearray")
+        .allowlist_var("mp_type_memoryview")
         // dict
         .allowlist_type("mp_obj_dict_t")
         .allowlist_function("mp_obj_new_dict")

core/embed/rust/src/micropython/buffer.rs

@@ -66,7 +66,7 @@ impl TryFrom<Obj> for StrBuffer {
     type Error = Error;
 
     fn try_from(obj: Obj) -> Result<Self, Self::Error> {
-        if obj.is_qstr() || unsafe { ffi::mp_type_str.is_type_of(obj) } {
+        if obj.is_str() {
             let bufinfo = get_buffer_info(obj, ffi::MP_BUFFER_READ)?;
             let new = Self {
                 ptr: bufinfo.buf as _,
@@ -189,3 +189,25 @@ impl crate::trace::Trace for StrBuffer {
         self.as_ref().trace(t)
     }
 }
+
+/// Version of `get_buffer` for strings that ties the string lifetime with
+/// another object that is expected to be placed on stack or in micropython heap
+/// and be the beginning of a chain of references that lead to the `obj`.
+///
+/// SAFETY:
+/// The caller must ensure that:
+/// (a) the `_owner` is an object visible to the micropython GC,
+/// (b) the `_owner` contains a reference that leads to `obj`, possibly through
+///     other objects,
+/// (c) that path is not broken as long as the returned reference lives.
+pub unsafe fn get_str_owner<T: ?Sized>(_owner: &T, obj: Obj) -> Result<&str, Error> {
+    if !obj.is_str() {
+        return Err(Error::TypeError);
+    }
+    // SAFETY:
+    // (a) only immutable references are taken.
+    // (b) micropython guarantees immutability and the buffer is not freed/moved as
+    //     long as _owner satisfies precondition.
+    let buffer = unsafe { get_buffer(obj)? };
+    str::from_utf8(buffer).map_err(|_| Error::TypeError)
+}

core/embed/rust/src/micropython/obj.rs

@@ -410,3 +410,18 @@ impl Obj {
         }
     }
 }
+
+impl Obj {
+    pub fn is_bytes(self) -> bool {
+        unsafe {
+            ffi::mp_type_bytes.is_type_of(self)
+                || ffi::mp_type_bytearray.is_type_of(self)
+                || ffi::mp_type_memoryview.is_type_of(self)
+        }
+    }
+
+    pub fn is_str(self) -> bool {
+        let is_type_str = unsafe { ffi::mp_type_str.is_type_of(self) };
+        is_type_str || self.is_qstr()
+    }
+}

core/embed/rust/src/ui/component/text/paragraphs.rs

@@ -24,8 +24,23 @@ pub const PARAGRAPH_BOTTOM_SPACE: i16 = 5;
 pub type ParagraphVecLong<T> = Vec<Paragraph<T>, 32>;
 pub type ParagraphVecShort<T> = Vec<Paragraph<T>, 8>;
 
+/// Maximum number of characters that can be displayed on screen at once. Used
+/// for on-the-fly conversion of binary data to hexadecimal representation.
+/// NOTE: can be fine-tuned for particular model screen to decrease memory
+/// consumption and conversion time.
+pub const SCRATCH_BUFFER_LEN: usize = 256;
+
 pub trait ParagraphSource {
-    fn at(&self, i: usize) -> Paragraph<&str>;
+    /// Return text and associated style for given paragraph index and character
+    /// offset within the paragraph.
+    ///
+    /// Implementations can use the provided buffer to perform some kind of
+    /// conversion (currently used for displaying binary data in
+    /// hexadecimal) and return a reference to this buffer. Caller needs to
+    /// make sure the buffer is large enough to fit screenfull of characters.
+    fn at<'a>(&'a self, index: usize, offset: usize, buffer: &'a mut [u8]) -> Paragraph<&'a str>;
+
+    /// Number of paragraphs.
     fn size(&self) -> usize;
 
     fn into_paragraphs(self) -> Paragraphs<Self>
@@ -40,8 +55,8 @@ impl<T, const N: usize> ParagraphSource for Vec<Paragraph<T>, N>
 where
     T: AsRef<str>,
 {
-    fn at(&self, i: usize) -> Paragraph<&str> {
-        self[i].to_ref()
+    fn at<'a>(&'a self, index: usize, offset: usize, _buffer: &'a mut [u8]) -> Paragraph<&'a str> {
+        self[index].offset_as_ref(offset)
     }
 
     fn size(&self) -> usize {
@@ -53,8 +68,8 @@ impl<T, const N: usize> ParagraphSource for [Paragraph<T>; N]
 where
     T: AsRef<str>,
 {
-    fn at(&self, i: usize) -> Paragraph<&str> {
-        self[i].to_ref()
+    fn at<'a>(&'a self, index: usize, offset: usize, _buffer: &'a mut [u8]) -> Paragraph<&'a str> {
+        self[index].offset_as_ref(offset)
     }
 
     fn size(&self) -> usize {
@@ -66,9 +81,9 @@ impl<T> ParagraphSource for Paragraph<T>
 where
     T: AsRef<str>,
 {
-    fn at(&self, i: usize) -> Paragraph<&str> {
-        assert_eq!(i, 0);
-        self.to_ref()
+    fn at<'a>(&'a self, index: usize, offset: usize, _buffer: &'a mut [u8]) -> Paragraph<&'a str> {
+        assert_eq!(index, 0);
+        self.offset_as_ref(offset)
     }
 
     fn size(&self) -> usize {
@@ -157,26 +172,31 @@ where
         }
     }
 
-    /// Returns iterator over visible layouts (bounding box, style) together
+    /// Iterate over visible layouts (bounding box, style) together
     /// with corresponding string content. Should not get monomorphized.
-    fn visible_content<'a>(
-        content: &'a dyn ParagraphSource,
+    fn foreach_visible<'a, 'b>(
+        source: &'a dyn ParagraphSource,
         visible: &'a [TextLayout],
         offset: PageOffset,
-    ) -> impl Iterator<Item = (&'a TextLayout, &'a str)> {
-        visible.iter().zip(
-            (offset.par..content.size())
-                .map(|i| content.at(i))
-                .filter(|p| !p.content.is_empty())
-                .enumerate()
-                .map(move |(i, p): (usize, Paragraph<&str>)| {
-                    if i == 0 {
-                        &p.content[offset.chr..]
-                    } else {
-                        p.content
-                    }
-                }),
-        )
+        func: &'b mut dyn FnMut(&TextLayout, &str),
+    ) {
+        let mut buffer = [0; SCRATCH_BUFFER_LEN];
+        let mut vis_iter = visible.iter();
+        let mut chr = offset.chr;
+
+        for par in offset.par..source.size() {
+            let s = source.at(par, chr, &mut buffer).content;
+            if s.is_empty() {
+                chr = 0;
+                continue;
+            }
+            if let Some(layout) = vis_iter.next() {
+                func(layout, s);
+            } else {
+                break;
+            }
+            chr = 0;
+        }
     }
 }
 
@@ -197,9 +217,14 @@ where
     }
 
     fn paint(&mut self) {
-        for (layout, content) in Self::visible_content(&self.source, &self.visible, self.offset) {
-            layout.render_text(content);
-        }
+        Self::foreach_visible(
+            &self.source,
+            &self.visible,
+            self.offset,
+            &mut |layout, content| {
+                layout.render_text(content);
+            },
+        )
     }
 
     fn bounds(&self, sink: &mut dyn FnMut(Rect)) {
@@ -239,11 +264,15 @@ pub mod trace {
     impl<T: ParagraphSource> crate::trace::Trace for Paragraphs<T> {
         fn trace(&self, t: &mut dyn crate::trace::Tracer) {
             t.open("Paragraphs");
-            for (layout, content) in Self::visible_content(&self.source, &self.visible, self.offset)
-            {
-                layout.layout_text(content, &mut layout.initial_cursor(), &mut TraceSink(t));
-                t.string("\n");
-            }
+            Self::foreach_visible(
+                &self.source,
+                &self.visible,
+                self.offset,
+                &mut |layout, content| {
+                    layout.layout_text(content, &mut layout.initial_cursor(), &mut TraceSink(t));
+                    t.string("\n");
+                },
+            );
             t.close();
         }
     }
@@ -290,16 +319,18 @@ impl<T> Paragraph<T> {
         self
     }
 
+    pub fn content(&self) -> &T {
+        &self.content
+    }
+
     pub fn update(&mut self, content: T) {
         self.content = content
     }
 
-    fn to_ref(&self) -> Paragraph<&str>
-    where
-        T: AsRef<str>,
-    {
+    /// Copy style and replace content.
+    pub fn with_content<U>(&self, content: U) -> Paragraph<U> {
         Paragraph {
-            content: self.content.as_ref(),
+            content,
             style: self.style,
             align: self.align,
             break_after: self.break_after,
@@ -307,6 +338,13 @@ impl<T> Paragraph<T> {
         }
     }
 
+    pub fn offset_as_ref(&self, offset: usize) -> Paragraph<&str>
+    where
+        T: AsRef<str>,
+    {
+        self.with_content(&self.content.as_ref()[offset..])
+    }
+
     fn layout(&self, area: Rect) -> TextLayout {
         TextLayout {
             padding_top: PARAGRAPH_TOP_SPACE,
@@ -344,7 +382,8 @@ impl PageOffset {
         source: &dyn ParagraphSource,
         full_height: i16,
     ) -> (PageOffset, Option<Rect>, Option<TextLayout>) {
-        let paragraph = source.at(self.par);
+        let mut buffer = [0; SCRATCH_BUFFER_LEN];
+        let paragraph = source.at(self.par, self.chr, &mut buffer);
 
         // Skip empty paragraphs.
         if paragraph.content.is_empty() {
@@ -355,8 +394,9 @@ impl PageOffset {
 
         // Handle the `no_break` flag used to keep key-value pair on the same page.
         if paragraph.no_break && self.chr == 0 {
+            let mut next_buffer = [0; SCRATCH_BUFFER_LEN];
             if let Some(next_paragraph) =
-                (self.par + 1 < source.size()).then(|| source.at(self.par + 1))
+                (self.par + 1 < source.size()).then(|| source.at(self.par + 1, 0, &mut next_buffer))
             {
                 if Self::should_place_pair_on_next_page(
                     &paragraph,
@@ -371,7 +411,7 @@ impl PageOffset {
 
         // Find out the dimensions of the paragraph at given char offset.
         let mut layout = paragraph.layout(area);
-        let fit = layout.fit_text(&paragraph.content[self.chr..]);
+        let fit = layout.fit_text(paragraph.content);
         let (used, remaining_area) = area.split_top(fit.height());
         layout.bounds = used;
 

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

@@ -1,10 +1,18 @@
 use crate::{
     error::Error,
     micropython::{
+        buffer::{get_buffer, get_str_owner, StrBuffer},
+        gc::Gc,
         iter::{Iter, IterBuf},
+        list::List,
         obj::Obj,
     },
+    ui::component::text::{
+        paragraphs::{Paragraph, ParagraphSource},
+        TextStyle,
+    },
 };
+use core::str;
 use cstr_core::cstr;
 use heapless::Vec;
 
@@ -32,3 +40,177 @@ where
     // Returns error if array.len() != N
     vec.into_array().map_err(|_| err)
 }
+
+fn hexlify<'a>(data: &[u8], buffer: &'a mut [u8]) -> &'a str {
+    const HEX_LOWER: [u8; 16] = *b"0123456789abcdef";
+    let mut i: usize = 0;
+    for b in data.iter().take(buffer.len() / 2) {
+        let hi: usize = ((b & 0xf0) >> 4).into();
+        let lo: usize = (b & 0x0f).into();
+        buffer[i] = HEX_LOWER[hi];
+        buffer[i + 1] = HEX_LOWER[lo];
+        i += 2;
+    }
+    // SAFETY: only <0x7f bytes are used to construct the string
+    unsafe { str::from_utf8_unchecked(&buffer[0..i]) }
+}
+
+pub enum StrOrBytes {
+    Str(StrBuffer),
+    Bytes(Obj),
+}
+
+impl StrOrBytes {
+    pub fn as_str_offset<'a>(&'a self, offset: usize, buffer: &'a mut [u8]) -> &'a str {
+        match self {
+            StrOrBytes::Str(x) => &x.as_ref()[offset..],
+            StrOrBytes::Bytes(x) => Self::hexlify(*x, offset, buffer),
+        }
+    }
+
+    fn hexlify(obj: Obj, offset: usize, buffer: &mut [u8]) -> &str {
+        if !obj.is_bytes() {
+            return "ERROR";
+        }
+
+        // Convert offset to byte representation, handle case where it points in the
+        // middle of a byte.
+        let bin_off = offset / 2;
+        let hex_off = offset % 2;
+
+        // SAFETY:
+        // (a) only immutable references are taken
+        // (b) reference is discarded before returning to micropython
+        let bin_slice = if let Ok(buf) = unsafe { get_buffer(obj) } {
+            &buf[bin_off..]
+        } else {
+            return "ERROR";
+        };
+        let hexadecimal = hexlify(bin_slice, buffer);
+
+        &hexadecimal[hex_off..]
+    }
+}
+
+impl TryFrom<Obj> for StrOrBytes {
+    type Error = Error;
+
+    fn try_from(obj: Obj) -> Result<Self, Error> {
+        if obj.is_str() {
+            Ok(StrOrBytes::Str(obj.try_into()?))
+        } else if obj.is_bytes() {
+            Ok(StrOrBytes::Bytes(obj))
+        } else {
+            Err(Error::TypeError)
+        }
+    }
+}
+
+pub struct ConfirmBlob {
+    pub description: StrBuffer,
+    pub extra: StrBuffer,
+    pub data: StrOrBytes,
+    pub description_font: &'static TextStyle,
+    pub extra_font: &'static TextStyle,
+    pub data_font: &'static TextStyle,
+}
+
+impl ParagraphSource for ConfirmBlob {
+    fn at<'a>(&'a self, index: usize, offset: usize, buffer: &'a mut [u8]) -> Paragraph<&'a str> {
+        match index {
+            0 => Paragraph::new(self.description_font, &self.description.as_ref()[offset..]),
+            1 => Paragraph::new(self.extra_font, &self.extra.as_ref()[offset..]),
+            2 => Paragraph::new(self.data_font, self.data.as_str_offset(offset, buffer)),
+            _ => unreachable!(),
+        }
+    }
+
+    fn size(&self) -> usize {
+        3
+    }
+}
+
+pub struct PropsList {
+    items: Gc<List>,
+    key_font: &'static TextStyle,
+    value_font: &'static TextStyle,
+    value_mono_font: &'static TextStyle,
+}
+
+impl PropsList {
+    pub fn new(
+        obj: Obj,
+        key_font: &'static TextStyle,
+        value_font: &'static TextStyle,
+        value_mono_font: &'static TextStyle,
+    ) -> Result<Self, Error> {
+        Ok(Self {
+            items: obj.try_into()?,
+            key_font,
+            value_font,
+            value_mono_font,
+        })
+    }
+}
+
+impl ParagraphSource for PropsList {
+    fn at<'a>(&'a self, index: usize, offset: usize, buffer: &'a mut [u8]) -> Paragraph<&'a str> {
+        let block = move |buffer| {
+            let entry = self.items.get(index / 2)?;
+            let [key, value, value_is_mono]: [Obj; 3] = iter_into_objs(entry)?;
+            let value_is_mono: bool = bool::try_from(value_is_mono)?;
+            let obj: Obj;
+            let style: &TextStyle;
+
+            if index % 2 == 0 {
+                if !key.is_str() && key != Obj::const_none() {
+                    return Err(Error::TypeError);
+                }
+                style = self.key_font;
+                obj = key;
+            } else {
+                if value_is_mono {
+                    style = self.value_mono_font;
+                } else {
+                    if value.is_bytes() {
+                        return Err(Error::TypeError);
+                    }
+                    style = self.value_font;
+                }
+                obj = value;
+            };
+
+            if obj == Obj::const_none() {
+                return Ok(Paragraph::new(style, ""));
+            }
+
+            let para = if obj.is_str() {
+                // SAFETY:
+                // As long as self is visible to GC, the string will be also. The paragraph
+                // rendering does not keep the returned references for long so we can reasonably
+                // expect for the chain of references from self to the buffer not to be broken.
+                let s = unsafe { get_str_owner(self, obj)? };
+                Paragraph::new(style, &s[offset..])
+            } else if obj.is_bytes() {
+                let s = StrOrBytes::hexlify(obj, offset, buffer);
+                Paragraph::new(style, s)
+            } else {
+                return Err(Error::TypeError);
+            };
+
+            if obj == key && value != Obj::const_none() {
+                Ok(para.no_break())
+            } else {
+                Ok(para)
+            }
+        };
+        match block(buffer) {
+            Ok(p) => p,
+            Err(_) => Paragraph::new(self.value_font, "ERROR"),
+        }
+    }
+
+    fn size(&self) -> usize {
+        2 * self.items.len()
+    }
+}

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

@@ -1,7 +1,5 @@
 use core::{cmp::Ordering, convert::TryInto, ops::Deref};
 
-use heapless::Vec;
-
 use crate::{
     error::Error,
     micropython::{
@@ -31,7 +29,7 @@ use crate::{
         layout::{
             obj::{ComponentMsgObj, LayoutObj},
             result::{CANCELLED, CONFIRMED, INFO},
-            util::{iter_into_array, iter_into_objs},
+            util::{iter_into_array, ConfirmBlob, PropsList},
         },
     },
 };
@@ -331,26 +329,24 @@ extern "C" fn new_confirm_action(n_args: usize, args: *const Obj, kwargs: *mut M
     unsafe { util::try_with_args_and_kwargs(n_args, args, kwargs, block) }
 }
 
-fn _confirm_blob(
+fn confirm_blob(
     title: StrBuffer,
-    data: Option<StrBuffer>,
+    data: Obj,
     description: Option<StrBuffer>,
     extra: Option<StrBuffer>,
     verb: Option<StrBuffer>,
     verb_cancel: Option<StrBuffer>,
     hold: bool,
 ) -> Result<Obj, Error> {
-    let mut par_source: Vec<Paragraph<StrBuffer>, 3> = Vec::new();
-    if let Some(description) = description {
-        unwrap!(par_source.push(Paragraph::new(&theme::TEXT_NORMAL, description)));
-    }
-    if let Some(extra) = extra {
-        unwrap!(par_source.push(Paragraph::new(&theme::TEXT_BOLD, extra)));
+    let paragraphs = ConfirmBlob {
+        description: description.unwrap_or_else(StrBuffer::empty),
+        extra: extra.unwrap_or_else(StrBuffer::empty),
+        data: data.try_into()?,
+        description_font: &theme::TEXT_NORMAL,
+        extra_font: &theme::TEXT_BOLD,
+        data_font: &theme::TEXT_MONO,
     }
-    if let Some(data) = data {
-        unwrap!(par_source.push(Paragraph::new(&theme::TEXT_MONO, data)));
-    }
-    let paragraphs = Paragraphs::new(par_source);
+    .into_paragraphs();
 
     let obj = if hold {
         LayoutObj::new(Frame::new(title, SwipeHoldPage::new(paragraphs, theme::BG)))?
@@ -369,10 +365,10 @@ fn _confirm_blob(
 extern "C" fn new_confirm_blob(n_args: usize, args: *const Obj, kwargs: *mut Map) -> Obj {
     let block = move |_args: &[Obj], kwargs: &Map| {
         let title: StrBuffer = kwargs.get(Qstr::MP_QSTR_title)?.try_into()?;
-        let data: StrBuffer = kwargs.get(Qstr::MP_QSTR_data)?.try_into()?;
-        let description: StrBuffer =
-            kwargs.get_or(Qstr::MP_QSTR_description, StrBuffer::empty())?;
-        let extra: StrBuffer = kwargs.get_or(Qstr::MP_QSTR_extra, StrBuffer::empty())?;
+        let data: Obj = kwargs.get(Qstr::MP_QSTR_data)?;
+        let description: Option<StrBuffer> =
+            kwargs.get(Qstr::MP_QSTR_description)?.try_into_option()?;
+        let extra: Option<StrBuffer> = kwargs.get(Qstr::MP_QSTR_extra)?.try_into_option()?;
         let verb_cancel: Option<StrBuffer> = kwargs
             .get(Qstr::MP_QSTR_verb_cancel)
             .unwrap_or_else(|_| Obj::const_none())
@@ -382,11 +378,11 @@ extern "C" fn new_confirm_blob(n_args: usize, args: *const Obj, kwargs: *mut Map
 
         let verb: StrBuffer = "CONFIRM".into();
 
-        _confirm_blob(
+        confirm_blob(
             title,
-            Some(data),
-            Some(description),
-            Some(extra),
+            data,
+            description,
+            extra,
             Some(verb),
             verb_cancel,
             hold,
@@ -401,31 +397,12 @@ extern "C" fn new_confirm_properties(n_args: usize, args: *const Obj, kwargs: *m
         let hold: bool = kwargs.get_or(Qstr::MP_QSTR_hold, false)?;
         let items: Obj = kwargs.get(Qstr::MP_QSTR_items)?;
 
-        let mut paragraphs = ParagraphVecLong::new();
-
-        let mut iter_buf = IterBuf::new();
-        let iter = Iter::try_from_obj_with_buf(items, &mut iter_buf)?;
-        for para in iter {
-            let [key, value, is_mono]: [Obj; 3] = iter_into_objs(para)?;
-            let key = key.try_into_option::<StrBuffer>()?;
-            let value = value.try_into_option::<StrBuffer>()?;
-
-            if let Some(key) = key {
-                if value.is_some() {
-                    paragraphs.add(Paragraph::new(&theme::TEXT_BOLD, key).no_break());
-                } else {
-                    paragraphs.add(Paragraph::new(&theme::TEXT_BOLD, key));
-                }
-            }
-            if let Some(value) = value {
-                if is_mono.try_into()? {
-                    paragraphs.add(Paragraph::new(&theme::TEXT_MONO, value));
-                } else {
-                    paragraphs.add(Paragraph::new(&theme::TEXT_NORMAL, value));
-                }
-            }
-        }
-
+        let paragraphs = PropsList::new(
+            items,
+            &theme::TEXT_BOLD,
+            &theme::TEXT_NORMAL,
+            &theme::TEXT_MONO,
+        )?;
         let obj = if hold {
             LayoutObj::new(Frame::new(
                 title,
@@ -497,8 +474,9 @@ extern "C" fn new_show_qr(n_args: usize, args: *const Obj, kwargs: *mut Map) ->
 extern "C" fn new_confirm_value(n_args: usize, args: *const Obj, kwargs: *mut Map) -> Obj {
     let block = move |_args: &[Obj], kwargs: &Map| {
         let title: StrBuffer = kwargs.get(Qstr::MP_QSTR_title)?.try_into()?;
-        let description: StrBuffer = kwargs.get(Qstr::MP_QSTR_description)?.try_into()?;
-        let value: StrBuffer = kwargs.get(Qstr::MP_QSTR_value)?.try_into()?;
+        let description: Option<StrBuffer> =
+            kwargs.get(Qstr::MP_QSTR_description)?.try_into_option()?;
+        let value: Obj = kwargs.get(Qstr::MP_QSTR_value)?;
 
         let verb: Option<StrBuffer> = kwargs
             .get(Qstr::MP_QSTR_verb)
@@ -506,15 +484,7 @@ extern "C" fn new_confirm_value(n_args: usize, args: *const Obj, kwargs: *mut Ma
             .try_into_option()?;
         let hold: bool = kwargs.get_or(Qstr::MP_QSTR_hold, false)?;
 
-        _confirm_blob(
-            title,
-            Some(value),
-            Some(description),
-            None,
-            verb,
-            None,
-            hold,
-        )
+        confirm_blob(title, value, description, None, verb, None, hold)
     };
     unsafe { util::try_with_args_and_kwargs(n_args, args, kwargs, block) }
 }
@@ -1142,9 +1112,9 @@ pub static mp_module_trezorui2: Module = obj_module! {
     /// def confirm_blob(
     ///     *,
     ///     title: str,
-    ///     data: str,
-    ///     description: str = "",
-    ///     extra: str = "",
+    ///     data: str | bytes,
+    ///     description: str | None,
+    ///     extra: str | None,
     ///     verb_cancel: str | None = None,
     ///     ask_pagination: bool = False,
     ///     hold: bool = False,
@@ -1155,12 +1125,11 @@ pub static mp_module_trezorui2: Module = obj_module! {
     /// def confirm_properties(
     ///     *,
     ///     title: str,
-    ///     items: Iterable[Tuple[str | None, str | None, bool]],
+    ///     items: list[tuple[str | None, str | bytes | None, bool]],
     ///     hold: bool = False,
     /// ) -> object:
     ///     """Confirm list of key-value pairs. The third component in the tuple should be True if
-    ///     the value is to be rendered as binary with monospace font, False otherwise.
-    ///     This only concerns the text style, you need to decode the value to UTF-8 in python."""
+    ///     the value is to be rendered as binary with monospace font, False otherwise."""
     Qstr::MP_QSTR_confirm_properties => obj_fn_kw!(0, new_confirm_properties).as_obj(),
 
     /// def confirm_reset_device(

core/mocks/generated/trezorui2.pyi

@@ -75,9 +75,9 @@ def confirm_action(
 def confirm_blob(
     *,
     title: str,
-    data: str,
-    description: str = "",
-    extra: str = "",
+    data: str | bytes,
+    description: str | None,
+    extra: str | None,
     verb_cancel: str | None = None,
     ask_pagination: bool = False,
     hold: bool = False,
@@ -89,12 +89,11 @@ def confirm_blob(
 def confirm_properties(
     *,
     title: str,
-    items: Iterable[Tuple[str | None, str | None, bool]],
+    items: list[tuple[str | None, str | bytes | None, bool]],
     hold: bool = False,
 ) -> object:
     """Confirm list of key-value pairs. The third component in the tuple should be True if
-    the value is to be rendered as binary with monospace font, False otherwise.
-    This only concerns the text style, you need to decode the value to UTF-8 in python."""
+    the value is to be rendered as binary with monospace font, False otherwise."""
 
 
 # rust/src/ui/model_tt/layout.rs

core/src/trezor/ui/layouts/tt_v2/__init__.py

@@ -1,5 +1,4 @@
 from typing import TYPE_CHECKING
-from ubinascii import hexlify
 
 from trezor import io, log, loop, ui
 from trezor.enums import ButtonRequestType
@@ -317,6 +316,8 @@ def _show_xpub(xpub: str, title: str, cancel: str) -> ui.Layout:
             title=title,
             data=xpub,
             verb_cancel=cancel,
+            extra=None,
+            description=None,
         )
     )
     return content
@@ -596,9 +597,6 @@ async def confirm_blob(
     br_code: ButtonRequestType = BR_TYPE_OTHER,
     ask_pagination: bool = False,
 ) -> None:
-    if isinstance(data, bytes):
-        data = hexlify(data).decode()
-
     await raise_if_not_confirmed(
         interact(
             ctx,
@@ -607,6 +605,7 @@ async def confirm_blob(
                     title=title.upper(),
                     description=description or "",
                     data=data,
+                    extra=None,
                     ask_pagination=ask_pagination,
                     hold=hold,
                 )
@@ -716,11 +715,8 @@ async def confirm_properties(
     hold: bool = False,
     br_code: ButtonRequestType = ButtonRequestType.ConfirmOutput,
 ) -> None:
-    def handle_bytes(prop: PropertyType) -> tuple[str | None, str | None, bool]:
-        if isinstance(prop[1], bytes):
-            return (prop[0], hexlify(prop[1]).decode(), True)
-        else:
-            return (prop[0], prop[1], False)
+    # Monospace flag for values that are bytes.
+    items = [(prop[0], prop[1], isinstance(prop[1], bytes)) for prop in props]
 
     await raise_if_not_confirmed(
         interact(
@@ -728,7 +724,7 @@ async def confirm_properties(
             _RustLayout(
                 trezorui2.confirm_properties(
                     title=title.upper(),
-                    items=map(handle_bytes, props),
+                    items=items,
                     hold=hold,
                 )
             ),