chore(common): Deprecate data field in CosiCommit message.

common/protob/messages-crypto.proto

@@ -98,7 +98,7 @@ message ECDHSessionKey {
  */
 message CosiCommit {
     repeated uint32 address_n = 1;              // BIP-32 path to derive the key from master node
-    optional bytes data = 2;        // Data to be signed
+    optional bytes data = 2 [deprecated=true];  // Data to be signed. Deprecated in 1.10.2, the field is not needed, since CoSi commitments are no longer deterministic.
 }
 
 /**

core/src/trezor/messages.py

@@ -1928,13 +1928,11 @@ if TYPE_CHECKING:
 
     class CosiCommit(protobuf.MessageType):
         address_n: "list[int]"
-        data: "bytes | None"
 
         def __init__(
             self,
             *,
             address_n: "list[int] | None" = None,
-            data: "bytes | None" = None,
         ) -> None:
             pass
 

legacy/firmware/protob/messages-crypto.options

@@ -6,7 +6,7 @@ CipherKeyValue.iv                       max_size:16
 CipheredKeyValue.value                  max_size:1024
 
 CosiCommit.address_n                    max_count:8
-CosiCommit.data                         max_size:32
+CosiCommit.data                         type:FT_IGNORE
 
 CosiCommitment.commitment               max_size:32
 CosiCommitment.pubkey                   max_size:32

python/.changelog.d/noissue.removed

@@ -0,0 +1 @@
+Remove DATA parameter from trezorctl cosi commit.

python/src/trezorlib/cli/cosi.py

@@ -14,7 +14,8 @@
 # You should have received a copy of the License along with this library.
 # If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
 
-from typing import TYPE_CHECKING
+import warnings
+from typing import TYPE_CHECKING, Optional
 
 import click
 
@@ -35,14 +36,17 @@ def cli() -> None:
 
 @cli.command()
 @click.option("-n", "--address", required=True, help=PATH_HELP)
-@click.argument("data")
+@click.argument("data_deprecated", required=False)
 @with_client
 def commit(
-    client: "TrezorClient", address: str, data: str
+    client: "TrezorClient", address: str, data_deprecated: Optional[str]
 ) -> "messages.CosiCommitment":
     """Ask device to commit to CoSi signing."""
+    if data_deprecated is not None:
+        warnings.warn("'data' argument is deprecated")
+
     address_n = tools.parse_path(address)
-    return cosi.commit(client, address_n, bytes.fromhex(data))
+    return cosi.commit(client, address_n)
 
 
 @cli.command()

python/src/trezorlib/cosi.py

@@ -14,8 +14,9 @@
 # You should have received a copy of the License along with this library.
 # If not, see <https://www.gnu.org/licenses/lgpl-3.0.html>.
 
+import warnings
 from functools import reduce
-from typing import TYPE_CHECKING, Iterable, List, Tuple
+from typing import TYPE_CHECKING, Iterable, List, Optional, Tuple
 
 from . import _ed25519, messages
 from .tools import expect
@@ -141,8 +142,17 @@ def sign_with_privkey(
 
 
 @expect(messages.CosiCommitment)
-def commit(client: "TrezorClient", n: "Address", data: bytes) -> "MessageType":
+def commit(
-    return client.call(messages.CosiCommit(address_n=n, data=data))
+    client: "TrezorClient", n: "Address", data: Optional[bytes] = None
+) -> "MessageType":
+    if data is not None:
+        warnings.warn(
+            "'data' argument is deprecated",
+            DeprecationWarning,
+            stacklevel=2,
+        )
+
+    return client.call(messages.CosiCommit(address_n=n))
 
 
 @expect(messages.CosiSignature)