core: rename class Overwintered to Zcashlike

core/src/apps/bitcoin/sign_tx/__init__.py

@@ -25,7 +25,7 @@ async def sign_tx(
         if coin.decred:
             signer_class = decred.Decred  # type: Type[bitcoin.Bitcoin]
         elif coin.overwintered:
-            signer_class = zcash.Overwintered
+            signer_class = zcash.Zcashlike
         elif coin.coin_name not in BITCOIN_NAMES:
             signer_class = bitcoinlike.Bitcoinlike
         else:

core/src/apps/bitcoin/sign_tx/zcash.py

@@ -34,7 +34,7 @@ if False:
 OVERWINTERED = const(0x80000000)
 
 
-class Overwintered(Bitcoinlike):
+class Zcashlike(Bitcoinlike):
     def __init__(self, tx: SignTx, keychain: Keychain, coin: CoinInfo) -> None:
         ensure(coin.overwintered)
         super().__init__(tx, keychain, coin)

core/tests/test_apps.bitcoin.zcash.zip243.py

@@ -8,7 +8,7 @@ from apps.common import coins
 from apps.bitcoin.writers import get_tx_hash
 
 if not utils.BITCOIN_ONLY:
-    from apps.bitcoin.sign_tx.zcash import Overwintered
+    from apps.bitcoin.sign_tx.zcash import Zcashlike
 
 
 # test vectors inspired from https://github.com/zcash-hackworks/zcash-test-vectors/blob/master/zip_0243.py
@@ -190,7 +190,7 @@ class TestZcashZip243(unittest.TestCase):
                 branch_id=v["branch_id"],
             )
 
-            zip243 = Overwintered(tx, None, coin)
+            zip243 = Zcashlike(tx, None, coin)
 
             for i in v["inputs"]:
                 txi = TxInputType()