lnpeer+wallet: use channel type for channel open

* channel_type is put into storage, serialized as int and
  deserialized as ChannelType
* check for static_remotekey is done via channel type

electrum/tests/test_lnchannel.py

@@ -107,6 +107,7 @@ def create_channel_state(funding_txid, funding_index, funding_sat, is_initiator,
             'fail_htlc_reasons': {},
             'unfulfilled_htlcs': {},
             'revocation_store': {},
+            'channel_type': lnutil.ChannelType.OPTION_STATIC_REMOTEKEY
     }
     return StoredDict(state, None, [])
 

electrum/tests/test_lnpeer.py

@@ -138,6 +138,7 @@ class MockLNWallet(Logger, NetworkRetryManager[LNPeerAddr]):
         self.features |= LnFeatures.VAR_ONION_OPT
         self.features |= LnFeatures.PAYMENT_SECRET_OPT
         self.features |= LnFeatures.OPTION_TRAMPOLINE_ROUTING_OPT
+        self.features |= LnFeatures.OPTION_CHANNEL_TYPE_OPT
         self.pending_payments = defaultdict(asyncio.Future)
         for chan in chans:
             chan.lnworker = self