feat(core/ui): add basic confirmation for Nostr signing

[no changelog]

core/embed/rust/librust_qstr.h

@@ -339,6 +339,7 @@ static void _librust_qstrs(void) {
   MP_QSTR_modify_fee__transaction_fee;
   MP_QSTR_more_info_callback;
   MP_QSTR_multiple_pages_texts;
+  MP_QSTR_nostr__event_kind_template;
   MP_QSTR_notification;
   MP_QSTR_notification_level;
   MP_QSTR_page_count;

core/embed/rust/src/translations/generated/translated_string.rs

@@ -1402,6 +1402,8 @@ pub enum TranslatedString {
     solana__stake_on_question = 989,  // "Stake SOL on {0}?"
     sign_message__confirm_without_review = 990,  // "Confirm without review"
     instructions__tap_to_continue = 991,  // "Tap to continue"
+    #[cfg(feature = "universal_fw")]
+    nostr__event_kind_template = 992,  // "Event kind: {0}"
 }
 
 impl TranslatedString {
@@ -2800,6 +2802,8 @@ impl TranslatedString {
             Self::solana__stake_on_question => "Stake SOL on {0}?",
             Self::sign_message__confirm_without_review => "Confirm without review",
             Self::instructions__tap_to_continue => "Tap to continue",
+            #[cfg(feature = "universal_fw")]
+            Self::nostr__event_kind_template => "Event kind: {0}",
         }
     }
 
@@ -4197,6 +4201,8 @@ impl TranslatedString {
             Qstr::MP_QSTR_solana__stake_on_question => Some(Self::solana__stake_on_question),
             Qstr::MP_QSTR_sign_message__confirm_without_review => Some(Self::sign_message__confirm_without_review),
             Qstr::MP_QSTR_instructions__tap_to_continue => Some(Self::instructions__tap_to_continue),
+            #[cfg(feature = "universal_fw")]
+            Qstr::MP_QSTR_nostr__event_kind_template => Some(Self::nostr__event_kind_template),
             _ => None,
         }
     }

core/mocks/trezortranslate_keys.pyi

@@ -497,6 +497,7 @@ class TR:
     nem__under_namespace: str = "under namespace"
     nem__unencrypted: str = "Unencrypted"
     nem__unknown_mosaic: str = "Unknown mosaic!"
+    nostr__event_kind_template: str = "Event kind: {0}"
     passphrase__access_wallet: str = "Access passphrase wallet?"
     passphrase__always_on_device: str = "Always enter your passphrase on Trezor?"
     passphrase__continue_with_empty_passphrase: str = "Continue with empty passphrase?"

core/src/apps/nostr/sign_event.py

@@ -12,9 +12,11 @@ if TYPE_CHECKING:
 async def sign_event(msg: NostrSignEvent, keychain: Keychain) -> NostrEventSignature:
     from ubinascii import hexlify
 
+    from trezor import TR
     from trezor.crypto.curve import secp256k1
     from trezor.crypto.hashlib import sha256
     from trezor.messages import NostrEventSignature
+    from trezor.ui.layouts import confirm_value
 
     from apps.common import paths
 
@@ -29,6 +31,19 @@ async def sign_event(msg: NostrSignEvent, keychain: Keychain) -> NostrEventSigna
     node = keychain.derive(address_n)
     pk = node.public_key()[-32:]
 
+    title = TR.nostr__event_kind_template.format(kind)
+
+    # confirm_value on TR only accepts one single info item
+    # which is why we concatenate all of them here.
+    # This is not great, but it gets the job done for now.
+    tags_str = f"created_at: {created_at}"
+    for t in tags:
+        tags_str += f"\n\n{t[0]}: " + (f" {' '.join(t[1:])}" if len(t) > 1 else "")
+
+    await confirm_value(
+        title, content, "", "nostr_sign_event", info_items=[("", tags_str)]
+    )
+
     # The event ID is obtained by serializing the event in a specific way:
     # "[0,pubkey,created_at,kind,tags,content]"
     # See NIP-01: https://github.com/nostr-protocol/nips/blob/master/01.md

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

@@ -792,6 +792,7 @@ async def confirm_value(
     else:
         info_items_list = list(info_items)
         if len(info_items_list) > 1:
+            # TODO: Support more than one info item!
             raise NotImplementedError("Only one info item is supported")
 
         send_button_request = True

core/translations/en.json

@@ -499,6 +499,7 @@
     "nem__under_namespace": "under namespace",
     "nem__unencrypted": "Unencrypted",
     "nem__unknown_mosaic": "Unknown mosaic!",
+    "nostr__event_kind_template": "Event kind: {0}",
     "passphrase__access_wallet": "Access passphrase wallet?",
     "passphrase__always_on_device": "Always enter your passphrase on Trezor?",
     "passphrase__continue_with_empty_passphrase": "Continue with empty passphrase?",

core/translations/order.json

@@ -990,5 +990,6 @@
   "988": "solana__vote_account",
   "989": "solana__stake_on_question",
   "990": "sign_message__confirm_without_review",
-  "991": "instructions__tap_to_continue"
+  "991": "instructions__tap_to_continue",
+  "992": "nostr__event_kind_template"
 }

core/translations/signatures.json

@@ -1,8 +1,8 @@
 {
   "current": {
-    "merkle_root": "1754d367a3f9796a460e21677a38465ac51110a5abaae96a8977e64cd3d35e27",
+    "merkle_root": "6684203c68c3a64d607c948fac5eeaa9f349f0e81cf54c8dfc662d5a8d3662e8",
-    "datetime": "2025-02-25T22:15:23.529862",
+    "datetime": "2025-02-27T10:39:27.809453",
-    "commit": "ba8a64d3e42febd344f60f039b6ac21ffb36aa9c"
+    "commit": "3dd1b0c026405da729821b8130baa7bfff432121"
   },
   "history": [
     {