eth: unknown token changed to (None, None..)

src/apps/ethereum/tokens.py

@@ -5,7 +5,7 @@ def token_by_chain_address(chain_id, address):
     return UNKNOWN_TOKEN
 
 
-UNKNOWN_TOKEN = True
+UNKNOWN_TOKEN = (None, None, None, None)
 
 # rest of the file is generated using trezor-common/ethereum_tokens-gen.py
 # DO NOT EDIT MANUALLY!

tests/test_apps.ethereum.tokens.py

@@ -22,7 +22,7 @@ class TestEthereumTokens(unittest.TestCase):
 
         # invalid adress, invalid chain
         token = tokens.token_by_chain_address(999, b'\x00\xFF')
-        self.assertEqual(token, tokens.UNKNOWN_TOKEN)
+        self.assertIs(token, tokens.UNKNOWN_TOKEN)
 
 
 if __name__ == '__main__':