wallet update: move fields that have string keys out of channel log

electrum/lnchannel.py

@@ -563,6 +563,8 @@ class Channel(AbstractChannel):
         self.onion_keys = state['onion_keys']  # type: Dict[int, bytes]
         self.data_loss_protect_remote_pcp = state['data_loss_protect_remote_pcp']
         self.hm = HTLCManager(log=state['log'], initial_feerate=initial_feerate)
+        self.fail_htlc_reasons = state["fail_htlc_reasons"]
+        self.unfulfilled_htlcs = state["unfulfilled_htlcs"]
         self._state = ChannelState[state['state']]
         self.peer_state = PeerState.DISCONNECTED
         self._sweep_info = {}
@@ -912,7 +914,7 @@ class Channel(AbstractChannel):
             remote_ctn = self.get_latest_ctn(REMOTE)
             if onion_packet:
                 # TODO neither local_ctn nor remote_ctn are used anymore... no point storing them.
-                self.hm.log['unfulfilled_htlcs'][htlc.htlc_id] = local_ctn, remote_ctn, onion_packet.hex(), False
+                self.unfulfilled_htlcs[htlc.htlc_id] = local_ctn, remote_ctn, onion_packet.hex(), False
 
         self.logger.info("receive_htlc")
         return htlc
@@ -1071,10 +1073,10 @@ class Channel(AbstractChannel):
             failure_message: Optional['OnionRoutingFailure']):
         error_hex = error_bytes.hex() if error_bytes else None
         failure_hex = failure_message.to_bytes().hex() if failure_message else None
-        self.hm.log['fail_htlc_reasons'][htlc_id] = (error_hex, failure_hex)
+        self.fail_htlc_reasons[htlc_id] = (error_hex, failure_hex)
 
     def pop_fail_htlc_reason(self, htlc_id):
-        error_hex, failure_hex = self.hm.log['fail_htlc_reasons'].pop(htlc_id, (None, None))
+        error_hex, failure_hex = self.fail_htlc_reasons.pop(htlc_id, (None, None))
         error_bytes = bytes.fromhex(error_hex) if error_hex else None
         failure_message = OnionRoutingFailure.from_bytes(bytes.fromhex(failure_hex)) if failure_hex else None
         return error_bytes, failure_message

electrum/lnhtlc.py

@@ -27,12 +27,7 @@ class HTLCManager:
             # note: "htlc_id" keys in dict are str! but due to json_db magic they can *almost* be treated as int...
             log[LOCAL] = deepcopy(initial)
             log[REMOTE] = deepcopy(initial)
-            log['unacked_local_updates2'] = {}
+            log[LOCAL]['unacked_updates'] = {}
-
-        if 'unfulfilled_htlcs' not in log:
-            log['unfulfilled_htlcs'] = {}  # htlc_id -> onion_packet
-        if 'fail_htlc_reasons' not in log:
-            log['fail_htlc_reasons'] = {}  # htlc_id -> error_bytes, failure_message
 
         # maybe bootstrap fee_updates if initial_feerate was provided
         if initial_feerate is not None:
@@ -209,7 +204,7 @@ class HTLCManager:
                 fee_update.ctn_local = self.ctn_latest(LOCAL) + 1
 
         # no need to keep local update raw msgs anymore, they have just been ACKed.
-        self.log['unacked_local_updates2'].pop(self.log[REMOTE]['ctn'], None)
+        self.log[LOCAL]['unacked_updates'].pop(self.log[REMOTE]['ctn'], None)
 
     @with_lock
     def _update_maybe_active_htlc_ids(self) -> None:
@@ -276,21 +271,21 @@ class HTLCManager:
         """We need to be able to replay unacknowledged updates we sent to the remote
         in case of disconnections. Hence, raw update and commitment_signed messages
         are stored temporarily (until they are acked)."""
-        # self.log['unacked_local_updates2'][ctn_idx] is a list of raw messages
+        # self.log[LOCAL]['unacked_updates'][ctn_idx] is a list of raw messages
         # containing some number of updates and then a single commitment_signed
         if is_commitment_signed:
             ctn_idx = self.ctn_latest(REMOTE)
         else:
             ctn_idx = self.ctn_latest(REMOTE) + 1
-        l = self.log['unacked_local_updates2'].get(ctn_idx, [])
+        l = self.log[LOCAL]['unacked_updates'].get(ctn_idx, [])
         l.append(raw_update_msg.hex())
-        self.log['unacked_local_updates2'][ctn_idx] = l
+        self.log[LOCAL]['unacked_updates'][ctn_idx] = l
 
     @with_lock
     def get_unacked_local_updates(self) -> Dict[int, Sequence[bytes]]:
-        #return self.log['unacked_local_updates2']
+        #return self.log[LOCAL]['unacked_updates']
         return {int(ctn): [bfh(msg) for msg in messages]
-                for ctn, messages in self.log['unacked_local_updates2'].items()}
+                for ctn, messages in self.log[LOCAL]['unacked_updates'].items()}
 
     ##### Queries re HTLCs:
 

electrum/lnpeer.py

@@ -770,6 +770,8 @@ class Peer(Logger):
             'onion_keys': {},
             'data_loss_protect_remote_pcp': {},
             "log": {},
+            "fail_htlc_reasons": {},  # htlc_id -> onion_packet
+            "unfulfilled_htlcs": {},  # htlc_id -> error_bytes, failure_message
             "revocation_store": {},
             "static_remotekey_enabled": self.is_static_remotekey(), # stored because it cannot be "downgraded", per BOLT2
         }
@@ -1862,7 +1864,7 @@ class Peer(Logger):
                     continue
                 self.maybe_send_commitment(chan)
                 done = set()
-                unfulfilled = chan.hm.log.get('unfulfilled_htlcs', {})
+                unfulfilled = chan.unfulfilled_htlcs
                 for htlc_id, (local_ctn, remote_ctn, onion_packet_hex, forwarding_info) in unfulfilled.items():
                     if not chan.hm.is_htlc_irrevocably_added_yet(htlc_proposer=REMOTE, htlc_id=htlc_id):
                         continue

electrum/tests/test_lnchannel.py

@@ -104,6 +104,8 @@ def create_channel_state(funding_txid, funding_index, funding_sat, is_initiator,
             'data_loss_protect_remote_pcp': {},
             'state': 'PREOPENING',
             'log': {},
+            'fail_htlc_reasons': {},
+            'unfulfilled_htlcs': {},
             'revocation_store': {},
     }
     return StoredDict(state, None, [])

electrum/wallet_db.py

@@ -53,7 +53,7 @@ if TYPE_CHECKING:
 
 OLD_SEED_VERSION = 4        # electrum versions < 2.0
 NEW_SEED_VERSION = 11       # electrum versions >= 2.0
-FINAL_SEED_VERSION = 42     # electrum >= 2.7 will set this to prevent
+FINAL_SEED_VERSION = 43     # electrum >= 2.7 will set this to prevent
                             # old versions from overwriting new format
 
 
@@ -191,6 +191,7 @@ class WalletDB(JsonDB):
         self._convert_version_40()
         self._convert_version_41()
         self._convert_version_42()
+        self._convert_version_43()
         self.put('seed_version', FINAL_SEED_VERSION)  # just to be sure
 
         self._after_upgrade_tasks()
@@ -837,6 +838,18 @@ class WalletDB(JsonDB):
                                        for _type, addr, val in item['outputs']]
         self.data['seed_version'] = 42
 
+    def _convert_version_43(self):
+        if not self._is_upgrade_method_needed(42, 42):
+            return
+        channels = self.data.pop('channels', {})
+        for k, c in channels.items():
+            log = c['log']
+            c['fail_htlc_reasons'] = log.pop('fail_htlc_reasons', {})
+            c['unfulfilled_htlcs'] = log.pop('unfulfilled_htlcs', {})
+            log["1"]['unacked_updates'] = log.pop('unacked_local_updates2', {})
+        self.data['channels'] = channels
+        self.data['seed_version'] = 43
+
     def _convert_imported(self):
         if not self._is_upgrade_method_needed(0, 13):
             return