apps: msg.address_n is always a list

src/apps/ethereum/get_address.py

@@ -8,21 +8,19 @@ async def get_address(ctx, msg):
     from trezor.crypto.hashlib import sha3_256
     from apps.common import seed
 
-    address_n = msg.address_n or ()
-
-    node = await seed.derive_node(ctx, address_n)
+    node = await seed.derive_node(ctx, msg.address_n)
 
     seckey = node.private_key()
     public_key = secp256k1.publickey(seckey, False)  # uncompressed
     address = sha3_256(public_key[1:], keccak=True).digest()[12:]
 
     if msg.show_display:
-        if len(address_n) > 1:  # path has slip44 network identifier
-            network = networks.by_slip44(address_n[1] & 0x7FFFFFFF)
+        if len(msg.address_n) > 1:  # path has slip44 network identifier
+            network = networks.by_slip44(msg.address_n[1] & 0x7FFFFFFF)
         else:
             network = None
         hex_addr = _ethereum_address_hex(address, network)
-        desc = address_n_to_str(address_n)
+        desc = address_n_to_str(msg.address_n)
         while True:
             if await show_address(ctx, hex_addr, desc=desc):
                 break

src/apps/ethereum/sign_message.py

@@ -21,8 +21,7 @@ def message_digest(message):
 async def sign_message(ctx, msg):
     await require_confirm_sign_message(ctx, msg.message)
 
-    address_n = msg.address_n or ()
-    node = await seed.derive_node(ctx, address_n)
+    node = await seed.derive_node(ctx, msg.address_n)
 
     signature = secp256k1.sign(
         node.private_key(),

src/apps/ethereum/sign_tx.py

@@ -128,8 +128,7 @@ async def send_request_chunk(ctx, data_left: int):
 
 
 async def send_signature(ctx, msg: EthereumSignTx, digest):
-    address_n = msg.address_n or ()
-    node = await seed.derive_node(ctx, address_n)
+    node = await seed.derive_node(ctx, msg.address_n)
 
     signature = secp256k1.sign(
         node.private_key(), digest, False, secp256k1.CANONICAL_SIG_ETHEREUM

src/apps/lisk/get_address.py

@@ -7,15 +7,13 @@ from apps.common.layout import address_n_to_str, show_address, show_qr
 
 
 async def get_address(ctx, msg):
-    address_n = msg.address_n or ()
-
-    node = await seed.derive_node(ctx, address_n, LISK_CURVE)
+    node = await seed.derive_node(ctx, msg.address_n, LISK_CURVE)
     pubkey = node.public_key()
     pubkey = pubkey[1:]  # skip ed25519 pubkey marker
     address = get_address_from_public_key(pubkey)
 
     if msg.show_display:
-        desc = address_n_to_str(address_n)
+        desc = address_n_to_str(msg.address_n)
         while True:
             if await show_address(ctx, address, desc=desc):
                 break

src/apps/lisk/get_public_key.py

@@ -6,9 +6,7 @@ from apps.common import layout, seed
 
 
 async def get_public_key(ctx, msg):
-    address_n = msg.address_n or ()
-
-    node = await seed.derive_node(ctx, address_n, LISK_CURVE)
+    node = await seed.derive_node(ctx, msg.address_n, LISK_CURVE)
     pubkey = node.public_key()
     pubkey = pubkey[1:]  # skip ed25519 pubkey marker
 

src/apps/lisk/sign_message.py

@@ -24,7 +24,7 @@ def message_digest(message):
 
 async def sign_message(ctx, msg):
     message = msg.message
-    address_n = msg.address_n or ()
+    address_n = msg.address_n
 
     await require_confirm_sign_message(ctx, message)
 

src/apps/lisk/sign_tx.py

@@ -36,8 +36,7 @@ async def sign_tx(ctx, msg):
 
 
 async def _get_keys(ctx, msg):
-    address_n = msg.address_n or ()
-    node = await seed.derive_node(ctx, address_n, LISK_CURVE)
+    node = await seed.derive_node(ctx, msg.address_n, LISK_CURVE)
 
     seckey = node.private_key()
     pubkey = node.public_key()

src/apps/tezos/get_address.py

@@ -11,8 +11,7 @@ from apps.tezos.helpers import (
 
 
 async def get_address(ctx, msg):
-    address_n = msg.address_n or ()
-    node = await seed.derive_node(ctx, address_n, TEZOS_CURVE)
+    node = await seed.derive_node(ctx, msg.address_n, TEZOS_CURVE)
 
     pk = seed.remove_ed25519_prefix(node.public_key())
     pkh = hashlib.blake2b(pk, outlen=20).digest()

src/apps/tezos/get_public_key.py

@@ -10,8 +10,7 @@ from apps.tezos.helpers import TEZOS_CURVE, TEZOS_PUBLICKEY_PREFIX, base58_encod
 
 
 async def get_public_key(ctx, msg):
-    address_n = msg.address_n or ()
-    node = await seed.derive_node(ctx, address_n, TEZOS_CURVE)
+    node = await seed.derive_node(ctx, msg.address_n, TEZOS_CURVE)
 
     pk = seed.remove_ed25519_prefix(node.public_key())
     pk_prefixed = base58_encode_check(pk, prefix=TEZOS_PUBLICKEY_PREFIX)

src/apps/tezos/sign_tx.py

@@ -16,8 +16,7 @@ from apps.tezos.helpers import (
 
 
 async def sign_tx(ctx, msg):
-    address_n = msg.address_n or ()
-    node = await seed.derive_node(ctx, address_n, TEZOS_CURVE)
+    node = await seed.derive_node(ctx, msg.address_n, TEZOS_CURVE)
 
     if msg.transaction is not None:
         to = _get_address_from_contract(msg.transaction.destination)