feat(python): Support UnlockPath in trezorlib.

python/.changelog.d/2289.added

@@ -0,0 +1 @@
+Add UnlockPath message.

python/src/trezorlib/btc.py

@@ -114,7 +114,21 @@ def get_public_node(
     coin_name: Optional[str] = None,
     script_type: messages.InputScriptType = messages.InputScriptType.SPENDADDRESS,
     ignore_xpub_magic: bool = False,
+    preauthorized: bool = False,
+    unlock_path: Optional[List[int]] = None,
+    unlock_path_mac: Optional[bytes] = None,
 ) -> "MessageType":
+    if unlock_path:
+        res = client.call(
+            messages.UnlockPath(address_n=unlock_path, mac=unlock_path_mac)
+        )
+        if not isinstance(res, messages.UnlockedPathRequest):
+            raise exceptions.TrezorException("Unexpected message")
+    elif preauthorized:
+        res = client.call(messages.DoPreauthorized())
+        if not isinstance(res, messages.PreauthorizedRequest):
+            raise exceptions.TrezorException("Unexpected message")
+
     return client.call(
         messages.GetPublicKey(
             address_n=n,
@@ -141,7 +155,21 @@ def get_authenticated_address(
     multisig: Optional[messages.MultisigRedeemScriptType] = None,
     script_type: messages.InputScriptType = messages.InputScriptType.SPENDADDRESS,
     ignore_xpub_magic: bool = False,
+    preauthorized: bool = False,
+    unlock_path: Optional[List[int]] = None,
+    unlock_path_mac: Optional[bytes] = None,
 ) -> "MessageType":
+    if unlock_path:
+        res = client.call(
+            messages.UnlockPath(address_n=unlock_path, mac=unlock_path_mac)
+        )
+        if not isinstance(res, messages.UnlockedPathRequest):
+            raise exceptions.TrezorException("Unexpected message")
+    elif preauthorized:
+        res = client.call(messages.DoPreauthorized())
+        if not isinstance(res, messages.PreauthorizedRequest):
+            raise exceptions.TrezorException("Unexpected message")
+
     return client.call(
         messages.GetAddress(
             address_n=n,
@@ -257,6 +285,8 @@ def sign_tx(
     prev_txes: Optional["TxCacheType"] = None,
     payment_reqs: Sequence[messages.TxAckPaymentRequest] = (),
     preauthorized: bool = False,
+    unlock_path: Optional[List[int]] = None,
+    unlock_path_mac: Optional[bytes] = None,
     **kwargs: Any,
 ) -> Tuple[Sequence[Optional[bytes]], bytes]:
     """Sign a Bitcoin-like transaction.
@@ -294,7 +324,13 @@ def sign_tx(
             if hasattr(signtx, name):
                 setattr(signtx, name, value)
 
-    if preauthorized:
+    if unlock_path:
+        res = client.call(
+            messages.UnlockPath(address_n=unlock_path, mac=unlock_path_mac)
+        )
+        if not isinstance(res, messages.UnlockedPathRequest):
+            raise exceptions.TrezorException("Unexpected message")
+    elif preauthorized:
         res = client.call(messages.DoPreauthorized())
         if not isinstance(res, messages.PreauthorizedRequest):
             raise exceptions.TrezorException("Unexpected message")

python/src/trezorlib/device.py

@@ -19,8 +19,8 @@ import time
 from typing import TYPE_CHECKING, Callable, Optional
 
 from . import messages
-from .exceptions import Cancelled
+from .exceptions import Cancelled, TrezorException
-from .tools import expect, session
+from .tools import Address, expect, session
 
 if TYPE_CHECKING:
     from .client import TrezorClient
@@ -220,6 +220,19 @@ def cancel_authorization(client: "TrezorClient") -> "MessageType":
     return client.call(messages.CancelAuthorization())
 
 
+@expect(messages.UnlockedPathRequest, field="mac", ret_type=bytes)
+def unlock_path(client: "TrezorClient", n: "Address") -> "MessageType":
+    resp = client.call(messages.UnlockPath(address_n=n))
+
+    # Cancel the UnlockPath workflow now that we have the authentication code.
+    try:
+        client.call(messages.Cancel())
+    except Cancelled:
+        return resp
+    else:
+        raise TrezorException("Unexpected response in UnlockPath flow")
+
+
 @session
 @expect(messages.Success, field="message", ret_type=str)
 def reboot_to_bootloader(client: "TrezorClient") -> "MessageType":