Restructure wallet storage:

- Perform json deserializations in wallet_db
 - use StoredDict class that keeps tracks of its modifications

electrum/json_db.py

@@ -45,6 +45,101 @@ def locked(func):
     return wrapper
 
 
+class StoredObject:
+
+    db = None
+
+    def __setattr__(self, key, value):
+        if self.db:
+            self.db.set_modified(True)
+        object.__setattr__(self, key, value)
+
+    def set_db(self, db):
+        self.db = db
+
+    def to_json(self):
+        d = dict(vars(self))
+        d.pop('db', None)
+        return d
+
+
+_RaiseKeyError = object() # singleton for no-default behavior
+
+class StoredDict(dict):
+
+    def __init__(self, data, db, path):
+        self.db = db
+        self.lock = self.db.lock if self.db else threading.RLock()
+        self.path = path
+        # recursively convert dicts to StoredDict
+        for k, v in list(data.items()):
+            self.__setitem__(k, v)
+
+    def convert_key(self, key):
+        # convert int, HTLCOwner to str
+        return str(int(key)) if isinstance(key, int) else key
+
+    @locked
+    def __setitem__(self, key, v):
+        key = self.convert_key(key)
+        is_new = key not in self
+        # early return to prevent unnecessary disk writes
+        if not is_new and self[key] == v:
+            return
+        # recursively convert dict to StoredDict.
+        # _convert_dict is called breadth-first
+        if isinstance(v, dict):
+            if self.db:
+                v = self.db._convert_dict(self.path, key, v)
+            v = StoredDict(v, self.db, self.path + [key])
+        # convert_value is called depth-first
+        if isinstance(v, dict) or isinstance(v, str):
+            if self.db:
+                v = self.db._convert_value(self.path, key, v)
+        # set parent of StoredObject
+        if isinstance(v, StoredObject):
+            v.set_db(self.db)
+        # set item
+        dict.__setitem__(self, key, v)
+        if self.db:
+            self.db.set_modified(True)
+
+    @locked
+    def __delitem__(self, key):
+        key = self.convert_key(key)
+        dict.__delitem__(self, key)
+        if self.db:
+            self.db.set_modified(True)
+
+    @locked
+    def __getitem__(self, key):
+        key = self.convert_key(key)
+        return dict.__getitem__(self, key)
+
+    @locked
+    def __contains__(self, key):
+        key = self.convert_key(key)
+        return dict.__contains__(self, key)
+
+    @locked
+    def pop(self, key, v=_RaiseKeyError):
+        key = self.convert_key(key)
+        if v is _RaiseKeyError:
+            r = dict.pop(self, key)
+        else:
+            r = dict.pop(self, key, v)
+        if self.db:
+            self.db.set_modified(True)
+        return r
+
+    @locked
+    def get(self, key, default=None):
+        key = self.convert_key(key)
+        return dict.get(self, key, default)
+
+
+
+
 class JsonDB(Logger):
 
     def __init__(self, data):
@@ -65,8 +160,6 @@ class JsonDB(Logger):
         v = self.data.get(key)
         if v is None:
             v = default
-        else:
-            v = copy.deepcopy(v)
         return v
 
     @modifier

electrum/lnchannel.py

@@ -54,6 +54,7 @@ from .lnhtlc import HTLCManager
 
 if TYPE_CHECKING:
     from .lnworker import LNWallet
+    from .json_db import StoredDict
 
 
 # lightning channel states
@@ -92,17 +93,6 @@ state_transitions = [
     (cs.CLOSED, cs.REDEEMED),
 ]
 
-class ChannelJsonEncoder(json.JSONEncoder):
-    def default(self, o):
-        if isinstance(o, bytes):
-            return binascii.hexlify(o).decode("ascii")
-        if isinstance(o, RevocationStore):
-            return o.serialize()
-        if isinstance(o, set):
-            return list(o)
-        if hasattr(o, 'to_json') and callable(o.to_json):
-            return o.to_json()
-        return super().default(o)
 
 RevokeAndAck = namedtuple("RevokeAndAck", ["per_commitment_secret", "next_per_commitment_point"])
 
@@ -110,31 +100,9 @@ RevokeAndAck = namedtuple("RevokeAndAck", ["per_commitment_secret", "next_per_co
 class RemoteCtnTooFarInFuture(Exception): pass
 
 
-def decodeAll(d, local):
-    for k, v in d.items():
-        if k == 'revocation_store':
-            yield (k, RevocationStore(v))
-        elif k.endswith("_basepoint") or k.endswith("_key"):
-            if local:
-                yield (k, Keypair(**dict(decodeAll(v, local))))
-            else:
-                yield (k, OnlyPubkeyKeypair(**dict(decodeAll(v, local))))
-        elif k in ["node_id", "channel_id", "short_channel_id", "pubkey", "privkey", "current_per_commitment_point", "next_per_commitment_point", "per_commitment_secret_seed", "current_commitment_signature", "current_htlc_signatures"] and v is not None:
-            yield (k, binascii.unhexlify(v))
-        else:
-            yield (k, v)
-
 def htlcsum(htlcs):
     return sum([x.amount_msat for x in htlcs])
 
-# following two functions are used because json
-# doesn't store int keys and byte string values
-def str_bytes_dict_from_save(x) -> Dict[int, bytes]:
-    return {int(k): bfh(v) for k,v in x.items()}
-
-def str_bytes_dict_to_save(x) -> Dict[str, str]:
-    return {str(k): bh2u(v) for k, v in x.items()}
-
 
 class Channel(Logger):
     # note: try to avoid naming ctns/ctxs/etc as "current" and "pending".
@@ -149,44 +117,53 @@ class Channel(Logger):
         except:
             return super().diagnostic_name()
 
-    def __init__(self, state, *, sweep_address=None, name=None, lnworker=None, initial_feerate=None):
+    def __init__(self, state: 'StoredDict', *, sweep_address=None, name=None, lnworker=None, initial_feerate=None):
         self.name = name
         Logger.__init__(self)
         self.lnworker = lnworker  # type: Optional[LNWallet]
         self.sweep_address = sweep_address
-        assert 'local_state' not in state
-        self.db_lock = self.lnworker.wallet.storage.db.lock if self.lnworker else threading.RLock()
+        self.storage = state
+        self.db_lock = self.storage.db.lock if self.storage.db else threading.RLock()
         self.config = {}
         self.config[LOCAL] = state["local_config"]
-        if type(self.config[LOCAL]) is not LocalConfig:
-            conf = dict(decodeAll(self.config[LOCAL], True))
-            self.config[LOCAL] = LocalConfig(**conf)
-        assert type(self.config[LOCAL].htlc_basepoint.privkey) is bytes
-
         self.config[REMOTE] = state["remote_config"]
-        if type(self.config[REMOTE]) is not RemoteConfig:
-            conf = dict(decodeAll(self.config[REMOTE], False))
-            self.config[REMOTE] = RemoteConfig(**conf)
-        assert type(self.config[REMOTE].htlc_basepoint.pubkey) is bytes
-
-        self.channel_id = bfh(state["channel_id"]) if type(state["channel_id"]) not in (bytes, type(None)) else state["channel_id"]
-        self.constraints = ChannelConstraints(**state["constraints"]) if type(state["constraints"]) is not ChannelConstraints else state["constraints"]
-        self.funding_outpoint = Outpoint(**dict(decodeAll(state["funding_outpoint"], False))) if type(state["funding_outpoint"]) is not Outpoint else state["funding_outpoint"]
-        self.node_id = bfh(state["node_id"]) if type(state["node_id"]) not in (bytes, type(None)) else state["node_id"]  # type: bytes
+        self.channel_id = bfh(state["channel_id"])
+        self.constraints = state["constraints"]
+        self.funding_outpoint = state["funding_outpoint"]
+        self.node_id = bfh(state["node_id"])
         self.short_channel_id = ShortChannelID.normalize(state["short_channel_id"])
         self.short_channel_id_predicted = self.short_channel_id
-        self.onion_keys = str_bytes_dict_from_save(state.get('onion_keys', {}))
-        self.data_loss_protect_remote_pcp = str_bytes_dict_from_save(state.get('data_loss_protect_remote_pcp', {}))
-        self.remote_update = bfh(state.get('remote_update')) if state.get('remote_update') else None
-
-        log = state.get('log')
-        self.hm = HTLCManager(log=log, initial_feerate=initial_feerate)
+        self.onion_keys = state['onion_keys']
+        self.data_loss_protect_remote_pcp = state['data_loss_protect_remote_pcp']
+        self.hm = HTLCManager(log=state['log'], initial_feerate=initial_feerate)
         self._state = channel_states[state['state']]
         self.peer_state = peer_states.DISCONNECTED
         self.sweep_info = {}  # type: Dict[str, Dict[str, SweepInfo]]
         self._outgoing_channel_update = None  # type: Optional[bytes]
         self.revocation_store = RevocationStore(state["revocation_store"])
 
+    def set_onion_key(self, key, value):
+        self.onion_keys[key] = value
+
+    def get_onion_key(self, key):
+        return self.onion_keys.get(key)
+
+    def set_data_loss_protect_remote_pcp(self, key, value):
+        self.data_loss_protect_remote_pcp[key] = value
+
+    def get_data_loss_protect_remote_pcp(self, key):
+        self.data_loss_protect_remote_pcp.get(key)
+
+    def set_remote_update(self, raw):
+        self.storage['remote_update'] = raw.hex()
+
+    def get_remote_update(self):
+        return bfh(self.storage.get('remote_update')) if self.storage.get('remote_update') else None
+
+    def set_short_channel_id(self, short_id):
+        self.short_channel_id = short_id
+        self.storage["short_channel_id"] = short_id
+
     def get_feerate(self, subject, ctn):
         return self.hm.get_feerate(subject, ctn)
 
@@ -229,8 +206,10 @@ class Channel(Logger):
         old_state = self._state
         if (old_state, state) not in state_transitions:
             raise Exception(f"Transition not allowed: {old_state.name} -> {state.name}")
-        self._state = state
         self.logger.debug(f'Setting channel state: {old_state.name} -> {state.name}')
+        self._state = state
+        self.storage['state'] = self._state.name
+
         if self.lnworker:
             self.lnworker.save_channel(self)
             self.lnworker.network.trigger_callback('channel', self)
@@ -656,51 +635,6 @@ class Channel(Logger):
             else:
                 self.hm.recv_update_fee(feerate)
 
-    def to_save(self):
-        to_save = {
-                "local_config": self.config[LOCAL],
-                "remote_config": self.config[REMOTE],
-                "channel_id": self.channel_id,
-                "short_channel_id": self.short_channel_id,
-                "constraints": self.constraints,
-                "funding_outpoint": self.funding_outpoint,
-                "node_id": self.node_id,
-                "log": self.hm.to_save(),
-                "revocation_store": self.revocation_store,
-                "onion_keys": str_bytes_dict_to_save(self.onion_keys),
-                "state": self._state.name,
-                "data_loss_protect_remote_pcp": str_bytes_dict_to_save(self.data_loss_protect_remote_pcp),
-                "remote_update": self.remote_update.hex() if self.remote_update else None
-        }
-        return to_save
-
-    def serialize(self):
-        namedtuples_to_dict = lambda v: {i: j._asdict() if isinstance(j, tuple) else j for i, j in v._asdict().items()}
-        serialized_channel = {}
-        to_save_ref = self.to_save()
-        for k, v in to_save_ref.items():
-            if isinstance(v, tuple):
-                serialized_channel[k] = namedtuples_to_dict(v)
-            else:
-                serialized_channel[k] = v
-        dumped = ChannelJsonEncoder().encode(serialized_channel)
-        roundtripped = json.loads(dumped)
-        reconstructed = Channel(roundtripped)
-        to_save_new = reconstructed.to_save()
-        if to_save_new != to_save_ref:
-            from pprint import PrettyPrinter
-            pp = PrettyPrinter(indent=168)
-            try:
-                from deepdiff import DeepDiff
-            except ImportError:
-                raise Exception("Channels did not roundtrip serialization without changes:\n" + pp.pformat(to_save_ref) + "\n" + pp.pformat(to_save_new))
-            else:
-                raise Exception("Channels did not roundtrip serialization without changes:\n" + pp.pformat(DeepDiff(to_save_ref, to_save_new)))
-        return roundtripped
-
-    def __str__(self):
-        return str(self.serialize())
-
     def make_commitment(self, subject, this_point, ctn) -> PartialTransaction:
         assert type(subject) is HTLCOwner
         feerate = self.get_feerate(subject, ctn)

electrum/lnhtlc.py

@@ -1,14 +1,17 @@
 from copy import deepcopy
-from typing import Optional, Sequence, Tuple, List, Dict
+from typing import Optional, Sequence, Tuple, List, Dict, TYPE_CHECKING
 
 from .lnutil import SENT, RECEIVED, LOCAL, REMOTE, HTLCOwner, UpdateAddHtlc, Direction, FeeUpdate
 from .util import bh2u, bfh
 
+if TYPE_CHECKING:
+    from .json_db import StoredDict
 
 class HTLCManager:
 
-    def __init__(self, *, log=None, initial_feerate=None):
-        if log is None:
+    def __init__(self, log:'StoredDict', *, initial_feerate=None):
+
+        if len(log) == 0:
             initial = {
                 'adds': {},
                 'locked_in': {},
@@ -17,33 +20,18 @@ class HTLCManager:
                 'fee_updates': {},       # "side who initiated fee update" -> action -> list of FeeUpdates
                 'revack_pending': False,
                 'next_htlc_id': 0,
-                'ctn': -1,  # oldest unrevoked ctx of sub
+                'ctn': -1,               # oldest unrevoked ctx of sub
             }
-            log = {LOCAL: deepcopy(initial), REMOTE: deepcopy(initial)}
-        else:
-            assert type(log) is dict
-            log = {(HTLCOwner(int(k)) if k in ("-1", "1") else k): v
-                   for k, v in deepcopy(log).items()}
-            for sub in (LOCAL, REMOTE):
-                log[sub]['adds'] = {int(htlc_id): UpdateAddHtlc(*htlc) for htlc_id, htlc in log[sub]['adds'].items()}
-                coerceHtlcOwner2IntMap = lambda ctns: {HTLCOwner(int(owner)): ctn for owner, ctn in ctns.items()}
-                # "side who offered htlc" -> action -> htlc_id -> whose ctx -> ctn
-                log[sub]['locked_in'] = {int(htlc_id): coerceHtlcOwner2IntMap(ctns) for htlc_id, ctns in log[sub]['locked_in'].items()}
-                log[sub]['settles'] = {int(htlc_id): coerceHtlcOwner2IntMap(ctns) for htlc_id, ctns in log[sub]['settles'].items()}
-                log[sub]['fails'] = {int(htlc_id): coerceHtlcOwner2IntMap(ctns) for htlc_id, ctns in log[sub]['fails'].items()}
-                # "side who initiated fee update" -> action -> list of FeeUpdates
-                log[sub]['fee_updates'] = { int(x): FeeUpdate(**fee_upd) for x,fee_upd in log[sub]['fee_updates'].items() }
-
-        if 'unacked_local_updates2' not in log:
+            log[LOCAL] = deepcopy(initial)
+            log[REMOTE] = deepcopy(initial)
             log['unacked_local_updates2'] = {}
-        log['unacked_local_updates2'] = {int(ctn): [bfh(msg) for msg in messages]
-                                         for ctn, messages in log['unacked_local_updates2'].items()}
+
         # maybe bootstrap fee_updates if initial_feerate was provided
         if initial_feerate is not None:
             assert type(initial_feerate) is int
             for sub in (LOCAL, REMOTE):
                 if not log[sub]['fee_updates']:
-                    log[sub]['fee_updates'][0] = FeeUpdate(initial_feerate, ctn_local=0, ctn_remote=0)
+                    log[sub]['fee_updates'][0] = FeeUpdate(rate=initial_feerate, ctn_local=0, ctn_remote=0)
         self.log = log
 
     def ctn_latest(self, sub: HTLCOwner) -> int:
@@ -66,20 +54,6 @@ class HTLCManager:
     def get_next_htlc_id(self, sub: HTLCOwner) -> int:
         return self.log[sub]['next_htlc_id']
 
-    def to_save(self):
-        log = deepcopy(self.log)
-        for sub in (LOCAL, REMOTE):
-            # adds
-            d = {}
-            for htlc_id, htlc in log[sub]['adds'].items():
-                d[htlc_id] = (htlc[0], bh2u(htlc[1])) + htlc[2:]
-            log[sub]['adds'] = d
-            # fee_updates
-            log[sub]['fee_updates'] = { x:fee_upd.to_json() for x, fee_upd in self.log[sub]['fee_updates'].items() }
-        log['unacked_local_updates2'] = {ctn: [bh2u(msg) for msg in messages]
-                                         for ctn, messages in log['unacked_local_updates2'].items()}
-        return log
-
     ##### Actions on channel:
 
     def channel_open_finished(self):
@@ -132,7 +106,7 @@ class HTLCManager:
     def _new_feeupdate(self, fee_update: FeeUpdate, subject: HTLCOwner) -> None:
         # overwrite last fee update if not yet committed to by anyone; otherwise append
         d = self.log[subject]['fee_updates']
-        assert type(d) is dict
+        #assert type(d) is StoredDict
         n = len(d)
         last_fee_update = d[n-1]
         if (last_fee_update.ctn_local is None or last_fee_update.ctn_local > self.ctn_latest(LOCAL)) \
@@ -194,7 +168,7 @@ class HTLCManager:
                 del self.log[REMOTE]['locked_in'][htlc_id]
                 del self.log[REMOTE]['adds'][htlc_id]
         if self.log[REMOTE]['locked_in']:
-            self.log[REMOTE]['next_htlc_id'] = max(self.log[REMOTE]['locked_in']) + 1
+            self.log[REMOTE]['next_htlc_id'] = max([int(x) for x in self.log[REMOTE]['locked_in'].keys()]) + 1
         else:
             self.log[REMOTE]['next_htlc_id'] = 0
         # htlcs removed
@@ -217,12 +191,14 @@ class HTLCManager:
             ctn_idx = self.ctn_latest(REMOTE)
         else:
             ctn_idx = self.ctn_latest(REMOTE) + 1
-        if ctn_idx not in self.log['unacked_local_updates2']:
-            self.log['unacked_local_updates2'][ctn_idx] = []
-        self.log['unacked_local_updates2'][ctn_idx].append(raw_update_msg)
+        l = self.log['unacked_local_updates2'].get(ctn_idx, [])
+        l.append(raw_update_msg.hex())
+        self.log['unacked_local_updates2'][ctn_idx] = l
 
     def get_unacked_local_updates(self) -> Dict[int, Sequence[bytes]]:
-        return self.log['unacked_local_updates2']
+        #return self.log['unacked_local_updates2']
+        return {int(ctn): [bfh(msg) for msg in messages]
+                for ctn, messages in self.log['unacked_local_updates2'].items()}
 
     ##### Queries re HTLCs:
 

electrum/lnpeer.py

@@ -221,7 +221,7 @@ class Peer(Logger):
     def maybe_save_remote_update(self, payload):
         for chan in self.channels.values():
             if chan.short_channel_id == payload['short_channel_id']:
-                chan.remote_update = payload['raw']
+                chan.set_remote_update(payload['raw'])
                 self.logger.info("saved remote_update")
 
     def on_announcement_signatures(self, payload):
@@ -611,9 +611,15 @@ class Peer(Logger):
             "constraints": constraints,
             "remote_update": None,
             "state": channel_states.PREOPENING.name,
+            'onion_keys': {},
+            'data_loss_protect_remote_pcp': {},
+            "log": {},
             "revocation_store": {},
         }
-        return chan_dict
+        channel_id = chan_dict.get('channel_id')
+        channels = self.lnworker.storage.db.get_dict('channels')
+        channels[channel_id] = chan_dict
+        return channels.get(channel_id)
 
     async def on_open_channel(self, payload):
         # payload['channel_flags']
@@ -684,7 +690,7 @@ class Peer(Logger):
             signature=sig_64,
         )
         chan.open_with_first_pcp(payload['first_per_commitment_point'], remote_sig)
-        self.lnworker.save_channel(chan)
+        self.lnworker.add_channel(chan)
         self.lnworker.lnwatcher.add_channel(chan.funding_outpoint.to_str(), chan.get_funding_address())
 
     def validate_remote_reserve(self, payload_field: bytes, dust_limit: int, funding_sat: int) -> int:
@@ -850,7 +856,7 @@ class Peer(Logger):
         else:
             if dlp_enabled and should_close_they_are_ahead:
                 self.logger.warning(f"channel_reestablish: remote is ahead of us! luckily DLP is enabled. remote PCP: {bh2u(their_local_pcp)}")
-                chan.data_loss_protect_remote_pcp[their_next_local_ctn - 1] = their_local_pcp
+                chan.set_data_loss_protect_remote_pcp(their_next_local_ctn - 1, their_local_pcp)
                 self.lnworker.save_channel(chan)
         if should_close_they_are_ahead:
             self.logger.warning(f"channel_reestablish: remote is ahead of us! trying to get them to force-close.")
@@ -885,7 +891,6 @@ class Peer(Logger):
         self.logger.info(f"on_funding_locked. channel: {bh2u(channel_id)}")
         chan = self.channels.get(channel_id)
         if not chan:
-            print(self.channels)
             raise Exception("Got unknown funding_locked", channel_id)
         if not chan.config[LOCAL].funding_locked_received:
             our_next_point = chan.config[REMOTE].next_per_commitment_point
@@ -1004,11 +1009,11 @@ class Peer(Logger):
         # peer may have sent us a channel update for the incoming direction previously
         pending_channel_update = self.orphan_channel_updates.get(chan.short_channel_id)
         if pending_channel_update:
-            chan.remote_update = pending_channel_update['raw']
+            chan.set_remote_update(pending_channel_update['raw'])
         # add remote update with a fresh timestamp
-        if chan.remote_update:
+        if chan.get_remote_update():
             now = int(time.time())
-            remote_update_decoded = decode_msg(chan.remote_update)[1]
+            remote_update_decoded = decode_msg(chan.get_remote_update())[1]
             remote_update_decoded['timestamp'] = now.to_bytes(4, byteorder="big")
             self.channel_db.add_channel_update(remote_update_decoded)
 

electrum/lnsweep.py

@@ -299,8 +299,8 @@ def analyze_ctx(chan: 'Channel', ctx: Transaction):
         their_pcp = ecc.ECPrivkey(per_commitment_secret).get_public_key_bytes(compressed=True)
         is_revocation = True
         #_logger.info(f'tx for revoked: {list(txs.keys())}')
-    elif ctn in chan.data_loss_protect_remote_pcp:
-        their_pcp = chan.data_loss_protect_remote_pcp[ctn]
+    elif chan.get_data_loss_protect_remote_pcp(ctn):
+        their_pcp = chan.get_data_loss_protect_remote_pcp(ctn)
         is_revocation = False
     else:
         return

electrum/lnutil.py

@@ -38,12 +38,7 @@ LN_MAX_FUNDING_SAT = pow(2, 24) - 1
 def ln_dummy_address():
     return redeem_script_to_address('p2wsh', '')
 
-
-class StoredObject:
-
-    def to_json(self):
-        return dict(vars(self))
-
+from .json_db import StoredObject
 
 @attr.s
 class OnlyPubkeyKeypair(StoredObject):
@@ -180,21 +175,23 @@ class RevocationStore:
     START_INDEX = 2 ** 48 - 1
 
     def __init__(self, storage):
-        self.index = storage.get('index', self.START_INDEX)
-        buckets = storage.get('buckets', {})
-        decode = lambda to_decode: ShachainElement(bfh(to_decode[0]), int(to_decode[1]))
-        self.buckets = dict((int(k), decode(v)) for k, v in buckets.items())
+        if len(storage) == 0:
+            storage['index'] = self.START_INDEX
+            storage['buckets'] = {}
+        self.storage = storage
+        self.buckets = storage['buckets']
 
     def add_next_entry(self, hsh):
-        new_element = ShachainElement(index=self.index, secret=hsh)
-        bucket = count_trailing_zeros(self.index)
+        index = self.storage['index']
+        new_element = ShachainElement(index=index, secret=hsh)
+        bucket = count_trailing_zeros(index)
         for i in range(0, bucket):
             this_bucket = self.buckets[i]
             e = shachain_derive(new_element, this_bucket.index)
             if e != this_bucket:
                 raise Exception("hash is not derivable: {} {} {}".format(bh2u(e.secret), bh2u(this_bucket.secret), this_bucket.index))
         self.buckets[bucket] = new_element
-        self.index -= 1
+        self.storage['index'] = index - 1
 
     def retrieve_secret(self, index: int) -> bytes:
         assert index <= self.START_INDEX, index
@@ -209,9 +206,6 @@ class RevocationStore:
             return element.secret
         raise UnableToDeriveSecret()
 
-    def serialize(self):
-        return {"index": self.index, "buckets": dict( (k, [bh2u(v.secret), v.index]) for k, v in self.buckets.items()) }
-
     def __eq__(self, o):
         return type(o) is RevocationStore and self.serialize() == o.serialize()
 

electrum/lnworker.py

@@ -34,13 +34,14 @@ from .bip32 import BIP32Node
 from .util import bh2u, bfh, InvoiceError, resolve_dns_srv, is_ip_address, log_exceptions
 from .util import ignore_exceptions, make_aiohttp_session
 from .util import timestamp_to_datetime
+from .util import MyEncoder
 from .logging import Logger
 from .lntransport import LNTransport, LNResponderTransport
 from .lnpeer import Peer, LN_P2P_NETWORK_TIMEOUT
 from .lnaddr import lnencode, LnAddr, lndecode
 from .ecc import der_sig_from_sig_string
 from .ecc_fast import is_using_fast_ecc
-from .lnchannel import Channel, ChannelJsonEncoder
+from .lnchannel import Channel
 from .lnchannel import channel_states, peer_states
 from . import lnutil
 from .lnutil import funding_output_script
@@ -106,8 +107,6 @@ FALLBACK_NODE_LIST_MAINNET = [
     LNPeerAddr(host='3.124.63.44', port=9735, pubkey=bfh('0242a4ae0c5bef18048fbecf995094b74bfb0f7391418d71ed394784373f41e4f3')),
 ]
 
-encoder = ChannelJsonEncoder()
-
 
 from typing import NamedTuple
 
@@ -347,19 +346,20 @@ class LNWallet(LNWorker):
         LNWorker.__init__(self, xprv)
         self.ln_keystore = keystore.from_xprv(xprv)
         self.localfeatures |= LnLocalFeatures.OPTION_DATA_LOSS_PROTECT_REQ
-        self.payments = self.storage.get('lightning_payments', {})        # RHASH -> amount, direction, is_paid
-        self.preimages = self.storage.get('lightning_preimages', {})      # RHASH -> preimage
+        self.payments = self.storage.db.get_dict('lightning_payments')     # RHASH -> amount, direction, is_paid
+        self.preimages = self.storage.db.get_dict('lightning_preimages')   # RHASH -> preimage
         self.sweep_address = wallet.get_receiving_address()
         self.lock = threading.RLock()
         self.logs = defaultdict(list)  # type: Dict[str, List[PaymentAttemptLog]]  # key is RHASH
 
         # note: accessing channels (besides simple lookup) needs self.lock!
-        self.channels = {}  # type: Dict[bytes, Channel]
-        for x in wallet.storage.get("channels", {}).values():
-            c = Channel(x, sweep_address=self.sweep_address, lnworker=self)
-            self.channels[c.channel_id] = c
+        self.channels = {}
+        channels = self.storage.db.get_dict("channels")
+        for channel_id, c in channels.items():
+            self.channels[bfh(channel_id)] = Channel(c, sweep_address=self.sweep_address, lnworker=self)
+
         # timestamps of opening and closing transactions
-        self.channel_timestamps = self.storage.get('lightning_channel_timestamps', {})
+        self.channel_timestamps = self.storage.db.get_dict('lightning_channel_timestamps')
         self.pending_payments = defaultdict(asyncio.Future)
 
     @ignore_exceptions
@@ -610,17 +610,9 @@ class LNWallet(LNWorker):
         assert type(chan) is Channel
         if chan.config[REMOTE].next_per_commitment_point == chan.config[REMOTE].current_per_commitment_point:
             raise Exception("Tried to save channel with next_point == current_point, this should not happen")
-        with self.lock:
-            self.channels[chan.channel_id] = chan
-            self.save_channels()
+        self.wallet.storage.write()
         self.network.trigger_callback('channel', chan)
 
-    def save_channels(self):
-        with self.lock:
-            dumped = dict( (k.hex(), c.serialize()) for k, c in self.channels.items() )
-        self.storage.put("channels", dumped)
-        self.storage.write()
-
     def save_short_chan_id(self, chan):
         """
         Checks if Funding TX has been mined. If it has, save the short channel ID in chan;
@@ -648,8 +640,8 @@ class LNWallet(LNWorker):
             return
         block_height, tx_pos = self.lnwatcher.get_txpos(chan.funding_outpoint.txid)
         assert tx_pos >= 0
-        chan.short_channel_id = ShortChannelID.from_components(
-            block_height, tx_pos, chan.funding_outpoint.output_index)
+        chan.set_short_channel_id(ShortChannelID.from_components(
+            block_height, tx_pos, chan.funding_outpoint.output_index))
         self.logger.info(f"save_short_channel_id: {chan.short_channel_id}")
         self.save_channel(chan)
 
@@ -669,7 +661,6 @@ class LNWallet(LNWorker):
 
         # save timestamp regardless of state, so that funding tx is returned in get_history
         self.channel_timestamps[bh2u(chan.channel_id)] = chan.funding_outpoint.txid, funding_height.height, funding_height.timestamp, None, None, None
-        self.storage.put('lightning_channel_timestamps', self.channel_timestamps)
 
         if chan.get_state() == channel_states.OPEN and self.should_channel_be_closed_due_to_expiring_htlcs(chan):
             self.logger.info(f"force-closing due to expiring htlcs")
@@ -714,7 +705,6 @@ class LNWallet(LNWorker):
 
         # fixme: this is wasteful
         self.channel_timestamps[bh2u(chan.channel_id)] = funding_txid, funding_height.height, funding_height.timestamp, closing_txid, closing_height.height, closing_height.timestamp
-        self.storage.put('lightning_channel_timestamps', self.channel_timestamps)
 
         # remove from channel_db
         if chan.short_channel_id is not None:
@@ -836,7 +826,7 @@ class LNWallet(LNWorker):
             funding_sat=funding_sat,
             push_msat=push_sat * 1000,
             temp_channel_id=os.urandom(32))
-        self.save_channel(chan)
+        self.add_channel(chan)
         self.lnwatcher.add_channel(chan.funding_outpoint.to_str(), chan.get_funding_address())
         self.network.trigger_callback('channels_updated', self.wallet)
         self.wallet.add_transaction(funding_tx)  # save tx as local into the wallet
@@ -846,6 +836,10 @@ class LNWallet(LNWorker):
             await asyncio.wait_for(self.network.broadcast_transaction(funding_tx), LN_P2P_NETWORK_TIMEOUT)
         return chan, funding_tx
 
+    def add_channel(self, chan):
+        with self.lock:
+            self.channels[chan.channel_id] = chan
+
     @log_exceptions
     async def add_peer(self, connect_str: str) -> Peer:
         node_id, rest = extract_nodeid(connect_str)
@@ -1133,7 +1127,6 @@ class LNWallet(LNWorker):
     def save_preimage(self, payment_hash: bytes, preimage: bytes):
         assert sha256(preimage) == payment_hash
         self.preimages[bh2u(payment_hash)] = bh2u(preimage)
-        self.storage.put('lightning_preimages', self.preimages)
         self.storage.write()
 
     def get_preimage(self, payment_hash: bytes) -> bytes:
@@ -1152,7 +1145,6 @@ class LNWallet(LNWorker):
         assert info.status in [PR_PAID, PR_UNPAID, PR_INFLIGHT]
         with self.lock:
             self.payments[key] = info.amount, info.direction, info.status
-        self.storage.put('lightning_payments', self.payments)
         self.storage.write()
 
     def get_payment_status(self, payment_hash):
@@ -1238,7 +1230,6 @@ class LNWallet(LNWorker):
                 del self.payments[payment_hash_hex]
         except KeyError:
             return
-        self.storage.put('lightning_payments', self.payments)
         self.storage.write()
 
     def get_balance(self):
@@ -1246,6 +1237,7 @@ class LNWallet(LNWorker):
             return Decimal(sum(chan.balance(LOCAL) if not chan.is_closed() else 0 for chan in self.channels.values()))/1000
 
     def list_channels(self):
+        encoder = MyEncoder()
         with self.lock:
             # we output the funding_outpoint instead of the channel_id because lnd uses channel_point (funding outpoint) to identify channels
             for channel_id, chan in self.channels.items():
@@ -1283,7 +1275,9 @@ class LNWallet(LNWorker):
         assert chan.is_closed()
         with self.lock:
             self.channels.pop(chan_id)
-        self.save_channels()
+            self.channel_timestamps.pop(chan_id.hex())
+            self.storage.get('channels').pop(chan_id.hex())
+
         self.network.trigger_callback('channels_updated', self.wallet)
         self.network.trigger_callback('wallet_updated', self.wallet)
 

electrum/plugins/labels/labels.py

@@ -149,8 +149,6 @@ class LabelsPlugin(BasePlugin):
                 wallet.labels[key] = value
 
         self.logger.info(f"received {len(response)} labels")
-        # do not write to disk because we're in a daemon thread
-        wallet.storage.put('labels', wallet.labels)
         self.set_nonce(wallet, response["nonce"] + 1)
         self.on_pulled(wallet)
 

electrum/tests/test_lnchannel.py

@@ -35,6 +35,7 @@ from electrum.lnutil import FeeUpdate
 from electrum.ecc import sig_string_from_der_sig
 from electrum.logging import console_stderr_handler
 from electrum.lnchannel import channel_states
+from electrum.json_db import StoredDict
 
 from . import ElectrumTestCase
 
@@ -45,9 +46,8 @@ def create_channel_state(funding_txid, funding_index, funding_sat, is_initiator,
     assert local_amount > 0
     assert remote_amount > 0
     channel_id, _ = lnpeer.channel_id_from_funding_tx(funding_txid, funding_index)
-
-    return {
-            "channel_id":channel_id,
+    state = {
+            "channel_id":channel_id.hex(),
             "short_channel_id":channel_id[:8],
             "funding_outpoint":lnpeer.Outpoint(funding_txid, funding_index),
             "remote_config":lnpeer.RemoteConfig(
@@ -63,7 +63,6 @@ def create_channel_state(funding_txid, funding_index, funding_sat, is_initiator,
                 initial_msat=remote_amount,
                 reserve_sat=0,
                 htlc_minimum_msat=1,
-
                 next_per_commitment_point=nex,
                 current_per_commitment_point=cur,
             ),
@@ -79,7 +78,6 @@ def create_channel_state(funding_txid, funding_index, funding_sat, is_initiator,
                 max_accepted_htlcs=5,
                 initial_msat=local_amount,
                 reserve_sat=0,
-
                 per_commitment_secret_seed=seed,
                 funding_locked_received=True,
                 was_announced=False,
@@ -91,11 +89,14 @@ def create_channel_state(funding_txid, funding_index, funding_sat, is_initiator,
                 is_initiator=is_initiator,
                 funding_txn_minimum_depth=3,
             ),
-            "node_id":other_node_id,
+            "node_id":other_node_id.hex(),
             'onion_keys': {},
+            'data_loss_protect_remote_pcp': {},
             'state': 'PREOPENING',
+            'log': {},
             'revocation_store': {},
     }
+    return StoredDict(state, None, [])
 
 def bip32(sequence):
     node = bip32_utils.BIP32Node.from_rootseed(b"9dk", xtype='standard').subkey_at_private_derivation(sequence)
@@ -317,7 +318,6 @@ class TestChannel(ElectrumTestCase):
         # Bob revokes his prior commitment given to him by Alice, since he now
         # has a valid signature for a newer commitment.
         bobRevocation, _ = bob_channel.revoke_current_commitment()
-        bob_channel.serialize()
         self.assertTrue(bob_channel.signature_fits(bob_channel.get_latest_commitment(LOCAL)))
 
         # Bob finally sends a signature for Alice's commitment transaction.
@@ -341,18 +341,14 @@ class TestChannel(ElectrumTestCase):
         # her prior commitment transaction. Alice shouldn't have any HTLCs to
         # forward since she's sending an outgoing HTLC.
         alice_channel.receive_revocation(bobRevocation)
-        alice_channel.serialize()
 
         self.assertTrue(alice_channel.signature_fits(alice_channel.get_latest_commitment(LOCAL)))
-        alice_channel.serialize()
 
         self.assertEqual(len(alice_channel.get_latest_commitment(LOCAL).outputs()), 2)
         self.assertEqual(len(alice_channel.get_latest_commitment(REMOTE).outputs()), 3)
         self.assertEqual(len(alice_channel.force_close_tx().outputs()), 2)
 
         self.assertEqual(len(alice_channel.hm.log[LOCAL]['adds']), 1)
-        alice_channel.serialize()
-
         self.assertEqual(alice_channel.get_next_commitment(LOCAL).outputs(),
                          bob_channel.get_latest_commitment(REMOTE).outputs())
 
@@ -365,14 +361,12 @@ class TestChannel(ElectrumTestCase):
         self.assertEqual(len(alice_channel.force_close_tx().outputs()), 3)
 
         self.assertEqual(len(alice_channel.hm.log[LOCAL]['adds']), 1)
-        alice_channel.serialize()
 
         tx1 = str(alice_channel.force_close_tx())
         self.assertNotEqual(tx0, tx1)
 
         # Alice then generates a revocation for bob.
         aliceRevocation, _ = alice_channel.revoke_current_commitment()
-        alice_channel.serialize()
 
         tx2 = str(alice_channel.force_close_tx())
         # since alice already has the signature for the next one, it doesn't change her force close tx (it was already the newer one)
@@ -384,7 +378,6 @@ class TestChannel(ElectrumTestCase):
         # into both commitment transactions.
         self.assertTrue(bob_channel.signature_fits(bob_channel.get_latest_commitment(LOCAL)))
         bob_channel.receive_revocation(aliceRevocation)
-        bob_channel.serialize()
 
         # At this point, both sides should have the proper number of satoshis
         # sent, and commitment height updated within their local channel
@@ -450,20 +443,16 @@ class TestChannel(ElectrumTestCase):
         self.assertEqual(1, alice_channel.get_oldest_unrevoked_ctn(LOCAL))
         self.assertEqual(len(alice_channel.included_htlcs(LOCAL, RECEIVED, ctn=2)), 0)
         aliceRevocation2, _ = alice_channel.revoke_current_commitment()
-        alice_channel.serialize()
         aliceSig2, aliceHtlcSigs2 = alice_channel.sign_next_commitment()
         self.assertEqual(aliceHtlcSigs2, [], "alice should generate no htlc signatures")
         self.assertEqual(len(bob_channel.get_latest_commitment(LOCAL).outputs()), 3)
         bob_channel.receive_revocation(aliceRevocation2)
-        bob_channel.serialize()
 
         bob_channel.receive_new_commitment(aliceSig2, aliceHtlcSigs2)
 
         bobRevocation2, (received, sent) = bob_channel.revoke_current_commitment()
         self.assertEqual(one_bitcoin_in_msat, received)
-        bob_channel.serialize()
         alice_channel.receive_revocation(bobRevocation2)
-        alice_channel.serialize()
 
         # At this point, Bob should have 6 BTC settled, with Alice still having
         # 4 BTC. Alice's channel should show 1 BTC sent and Bob's channel
@@ -509,8 +498,6 @@ class TestChannel(ElectrumTestCase):
         self.assertEqual(bob_channel.total_msat(RECEIVED), one_bitcoin_in_msat, "bob satoshis received incorrect")
         self.assertEqual(bob_channel.total_msat(SENT), 5 * one_bitcoin_in_msat, "bob satoshis sent incorrect")
 
-        alice_channel.serialize()
-
 
     def alice_to_bob_fee_update(self, fee=111):
         aoldctx = self.alice_channel.get_next_commitment(REMOTE).outputs()

electrum/tests/test_lnhtlc.py

@@ -4,18 +4,18 @@ from typing import NamedTuple
 
 from electrum.lnutil import RECEIVED, LOCAL, REMOTE, SENT, HTLCOwner, Direction
 from electrum.lnhtlc import HTLCManager
+from electrum.json_db import StoredDict
 
 from . import ElectrumTestCase
 
-
 class H(NamedTuple):
     owner : str
     htlc_id : int
 
 class TestHTLCManager(ElectrumTestCase):
     def test_adding_htlcs_race(self):
-        A = HTLCManager()
-        B = HTLCManager()
+        A = HTLCManager(StoredDict({}, None, []))
+        B = HTLCManager(StoredDict({}, None, []))
         A.channel_open_finished()
         B.channel_open_finished()
         ah0, bh0 = H('A', 0), H('B', 0)
@@ -61,8 +61,8 @@ class TestHTLCManager(ElectrumTestCase):
 
     def test_single_htlc_full_lifecycle(self):
         def htlc_lifecycle(htlc_success: bool):
-            A = HTLCManager()
-            B = HTLCManager()
+            A = HTLCManager(StoredDict({}, None, []))
+            B = HTLCManager(StoredDict({}, None, []))
             A.channel_open_finished()
             B.channel_open_finished()
             B.recv_htlc(A.send_htlc(H('A', 0)))
@@ -134,8 +134,8 @@ class TestHTLCManager(ElectrumTestCase):
 
     def test_remove_htlc_while_owing_commitment(self):
         def htlc_lifecycle(htlc_success: bool):
-            A = HTLCManager()
-            B = HTLCManager()
+            A = HTLCManager(StoredDict({}, None, []))
+            B = HTLCManager(StoredDict({}, None, []))
             A.channel_open_finished()
             B.channel_open_finished()
             ah0 = H('A', 0)
@@ -171,8 +171,8 @@ class TestHTLCManager(ElectrumTestCase):
         htlc_lifecycle(htlc_success=False)
 
     def test_adding_htlc_between_send_ctx_and_recv_rev(self):
-        A = HTLCManager()
-        B = HTLCManager()
+        A = HTLCManager(StoredDict({}, None, []))
+        B = HTLCManager(StoredDict({}, None, []))
         A.channel_open_finished()
         B.channel_open_finished()
         A.send_ctx()
@@ -217,8 +217,8 @@ class TestHTLCManager(ElectrumTestCase):
         self.assertEqual([(Direction.RECEIVED, ah0)], A.get_htlcs_in_next_ctx(REMOTE))
 
     def test_unacked_local_updates(self):
-        A = HTLCManager()
-        B = HTLCManager()
+        A = HTLCManager(StoredDict({}, None, []))
+        B = HTLCManager(StoredDict({}, None, []))
         A.channel_open_finished()
         B.channel_open_finished()
         self.assertEqual({}, A.get_unacked_local_updates())

electrum/tests/test_lnutil.py

@@ -2,13 +2,14 @@ import unittest
 import json
 
 from electrum import bitcoin
+from electrum.json_db import StoredDict
 from electrum.lnutil import (RevocationStore, get_per_commitment_secret_from_seed, make_offered_htlc,
                              make_received_htlc, make_commitment, make_htlc_tx_witness, make_htlc_tx_output,
                              make_htlc_tx_inputs, secret_to_pubkey, derive_blinded_pubkey, derive_privkey,
                              derive_pubkey, make_htlc_tx, extract_ctn_from_tx, UnableToDeriveSecret,
                              get_compressed_pubkey_from_bech32, split_host_port, ConnStringFormatError,
                              ScriptHtlc, extract_nodeid, calc_onchain_fees, UpdateAddHtlc)
-from electrum.util import bh2u, bfh
+from electrum.util import bh2u, bfh, MyEncoder
 from electrum.transaction import Transaction, PartialTransaction
 
 from . import ElectrumTestCase
@@ -422,7 +423,7 @@ class TestLNUtil(ElectrumTestCase):
         ]
 
         for test in tests:
-            receiver = RevocationStore({})
+            receiver = RevocationStore(StoredDict({}, None, []))
             for insert in test["inserts"]:
                 secret = bytes.fromhex(insert["secret"])
 
@@ -445,14 +446,19 @@ class TestLNUtil(ElectrumTestCase):
 
     def test_shachain_produce_consume(self):
         seed = bitcoin.sha256(b"shachaintest")
-        consumer = RevocationStore({})
+        consumer = RevocationStore(StoredDict({}, None, []))
         for i in range(10000):
             secret = get_per_commitment_secret_from_seed(seed, RevocationStore.START_INDEX - i)
             try:
                 consumer.add_next_entry(secret)
             except Exception as e:
                 raise Exception("iteration " + str(i) + ": " + str(e))
-            if i % 1000 == 0: self.assertEqual(consumer.serialize(), RevocationStore(json.loads(json.dumps(consumer.serialize()))).serialize())
+            if i % 1000 == 0:
+                c1 = consumer
+                s1 = json.dumps(c1.storage, cls=MyEncoder)
+                c2 = RevocationStore(StoredDict(json.loads(s1), None, []))
+                s2 = json.dumps(c2.storage, cls=MyEncoder)
+                self.assertEqual(s1, s2)
 
     def test_commitment_tx_with_all_five_HTLCs_untrimmed_minimum_feerate(self):
         to_local_msat = 6988000000

electrum/util.py

@@ -280,6 +280,8 @@ class MyEncoder(json.JSONEncoder):
             return obj.isoformat(' ')[:-3]
         if isinstance(obj, set):
             return list(obj)
+        if isinstance(obj, bytes): # for nametuples in lnchannel
+            return obj.hex()
         if hasattr(obj, 'to_json') and callable(obj.to_json):
             return obj.to_json()
         return super(MyEncoder, self).default(obj)

electrum/wallet.py

@@ -240,21 +240,13 @@ class Abstract_Wallet(AddressSynchronizer, ABC):
         # saved fields
         self.use_change            = storage.get('use_change', True)
         self.multiple_change       = storage.get('multiple_change', False)
-        self.labels                = storage.get('labels', {})
+        self.labels                = storage.db.get_dict('labels')
         self.frozen_addresses      = set(storage.get('frozen_addresses', []))
         self.frozen_coins          = set(storage.get('frozen_coins', []))  # set of txid:vout strings
-        self.fiat_value            = storage.get('fiat_value', {})
-        self.receive_requests      = storage.get('payment_requests', {})
-        self.invoices              = storage.get('invoices', {})
-        # convert invoices
-        # TODO invoices being these contextual dicts even internally,
-        #      where certain keys are only present depending on values of other keys...
-        #      it's horrible. we need to change this, at least for the internal representation,
-        #      to something that can be typed.
-        for invoice_key, invoice in self.invoices.items():
-            if invoice.get('type') == PR_TYPE_ONCHAIN:
-                outputs = [PartialTxOutput.from_legacy_tuple(*output) for output in invoice.get('outputs')]
-                invoice['outputs'] = outputs
+        self.fiat_value            = storage.db.get_dict('fiat_value')
+        self.receive_requests      = storage.db.get_dict('payment_requests')
+        self.invoices              = storage.db.get_dict('invoices')
+
         self._prepare_onchain_invoice_paid_detection()
         self.calc_unused_change_addresses()
         # save wallet type the first time
@@ -372,7 +364,6 @@ class Abstract_Wallet(AddressSynchronizer, ABC):
                 changed = True
         if changed:
             run_hook('set_label', self, name, text)
-            self.storage.put('labels', self.labels)
         return changed
 
     def set_fiat_value(self, txid, ccy, text, fx, value_sat):
@@ -404,7 +395,6 @@ class Abstract_Wallet(AddressSynchronizer, ABC):
             if ccy not in self.fiat_value:
                 self.fiat_value[ccy] = {}
             self.fiat_value[ccy][txid] = text
-        self.storage.put('fiat_value', self.fiat_value)
         return reset
 
     def get_fiat_value(self, txid, ccy):
@@ -625,12 +615,10 @@ class Abstract_Wallet(AddressSynchronizer, ABC):
         else:
             raise Exception('Unsupported invoice type')
         self.invoices[key] = invoice
-        self.storage.put('invoices', self.invoices)
         self.storage.write()
 
     def clear_invoices(self):
         self.invoices = {}
-        self.storage.put('invoices', self.invoices)
         self.storage.write()
 
     def get_invoices(self):
@@ -642,7 +630,8 @@ class Abstract_Wallet(AddressSynchronizer, ABC):
     def get_invoice(self, key):
         if key not in self.invoices:
             return
-        item = copy.copy(self.invoices[key])
+        # convert StoredDict to dict
+        item = dict(self.invoices[key])
         request_type = item.get('type')
         if request_type == PR_TYPE_ONCHAIN:
             item['status'] = PR_PAID if self.is_onchain_invoice_paid(item) else PR_UNPAID
@@ -1553,7 +1542,8 @@ class Abstract_Wallet(AddressSynchronizer, ABC):
         req = self.receive_requests.get(key)
         if not req:
             return
-        req = copy.copy(req)
+        # convert StoredDict to dict
+        req = dict(req)
         _type = req.get('type')
         if _type == PR_TYPE_ONCHAIN:
             addr = req['address']
@@ -1610,7 +1600,6 @@ class Abstract_Wallet(AddressSynchronizer, ABC):
         req['name'] = pr.pki_data
         req['sig'] = bh2u(pr.signature)
         self.receive_requests[key] = req
-        self.storage.put('payment_requests', self.receive_requests)
 
     def add_payment_request(self, req):
         if req['type'] == PR_TYPE_ONCHAIN:
@@ -1628,7 +1617,6 @@ class Abstract_Wallet(AddressSynchronizer, ABC):
             raise Exception('Unknown request type')
         amount = req.get('amount')
         self.receive_requests[key] = req
-        self.storage.put('payment_requests', self.receive_requests)
         self.set_label(key, message) # should be a default label
         return req
 
@@ -1643,7 +1631,6 @@ class Abstract_Wallet(AddressSynchronizer, ABC):
         """ lightning or on-chain """
         if key in self.invoices:
             self.invoices.pop(key)
-            self.storage.put('invoices', self.invoices)
         elif self.lnworker:
             self.lnworker.delete_payment(key)
 
@@ -1651,7 +1638,6 @@ class Abstract_Wallet(AddressSynchronizer, ABC):
         if addr not in self.receive_requests:
             return False
         self.receive_requests.pop(addr)
-        self.storage.put('payment_requests', self.receive_requests)
         return True
 
     def get_sorted_requests(self):

electrum/wallet_db.py

@@ -29,12 +29,16 @@ import copy
 import threading
 from collections import defaultdict
 from typing import Dict, Optional, List, Tuple, Set, Iterable, NamedTuple, Sequence
+import binascii
 
 from . import util, bitcoin
-from .util import profiler, WalletFileException, multisig_type, TxMinedInfo, bfh
+from .util import profiler, WalletFileException, multisig_type, TxMinedInfo, bfh, PR_TYPE_ONCHAIN
 from .keystore import bip44_derivation
-from .transaction import Transaction, TxOutpoint, tx_from_any, PartialTransaction
-from .json_db import JsonDB, locked, modifier
+from .transaction import Transaction, TxOutpoint, tx_from_any, PartialTransaction, PartialTxOutput
+from .logging import Logger
+from .lnutil import LOCAL, REMOTE, FeeUpdate, UpdateAddHtlc, LocalConfig, RemoteConfig, Keypair, OnlyPubkeyKeypair, RevocationStore
+from .lnutil import ChannelConstraints, Outpoint, ShachainElement
+from .json_db import StoredDict, JsonDB, locked, modifier
 
 # seed_version is now used for the version of the wallet file
 
@@ -44,17 +48,12 @@ FINAL_SEED_VERSION = 24     # electrum >= 2.7 will set this to prevent
                             # old versions from overwriting new format
 
 
-
-
 class TxFeesValue(NamedTuple):
     fee: Optional[int] = None
     is_calculated_by_us: bool = False
     num_inputs: Optional[int] = None
 
 
-
-
-
 class WalletDB(JsonDB):
 
     def __init__(self, raw, *, manual_upgrades: bool):
@@ -67,7 +66,6 @@ class WalletDB(JsonDB):
             self.put('seed_version', FINAL_SEED_VERSION)
             self._after_upgrade_tasks()
 
-
     def load_data(self, s):
         try:
             self.data = json.loads(s)
@@ -833,7 +831,7 @@ class WalletDB(JsonDB):
         self.tx_fees.pop(txid, None)
 
     @locked
-    def get_data_ref(self, name):
+    def get_dict(self, name):
         # Warning: interacts un-intuitively with 'put': certain parts
         # of 'data' will have pointers saved as separate variables.
         if name not in self.data:
@@ -895,9 +893,9 @@ class WalletDB(JsonDB):
     def load_addresses(self, wallet_type):
         """ called from Abstract_Wallet.__init__ """
         if wallet_type == 'imported':
-            self.imported_addresses = self.get_data_ref('addresses')  # type: Dict[str, dict]
+            self.imported_addresses = self.get_dict('addresses')  # type: Dict[str, dict]
         else:
-            self.get_data_ref('addresses')
+            self.get_dict('addresses')
             for name in ['receiving', 'change']:
                 if name not in self.data['addresses']:
                     self.data['addresses'][name] = []
@@ -911,26 +909,20 @@ class WalletDB(JsonDB):
 
     @profiler
     def _load_transactions(self):
+        self.data = StoredDict(self.data, self, [])
         # references in self.data
         # TODO make all these private
         # txid -> address -> set of (prev_outpoint, value)
-        self.txi = self.get_data_ref('txi')  # type: Dict[str, Dict[str, Set[Tuple[str, int]]]]
+        self.txi = self.get_dict('txi')                          # type: Dict[str, Dict[str, Set[Tuple[str, int]]]]
         # txid -> address -> set of (output_index, value, is_coinbase)
-        self.txo = self.get_data_ref('txo')  # type: Dict[str, Dict[str, Set[Tuple[int, int, bool]]]]
-        self.transactions = self.get_data_ref('transactions')   # type: Dict[str, Transaction]
-        self.spent_outpoints = self.get_data_ref('spent_outpoints')  # txid -> output_index -> next_txid
-        self.history = self.get_data_ref('addr_history')  # address -> list of (txid, height)
-        self.verified_tx = self.get_data_ref('verified_tx3')  # txid -> (height, timestamp, txpos, header_hash)
-        self.tx_fees = self.get_data_ref('tx_fees')  # type: Dict[str, TxFeesValue]
+        self.txo = self.get_dict('txo')                          # type: Dict[str, Dict[str, Set[Tuple[int, int, bool]]]]
+        self.transactions = self.get_dict('transactions')        # type: Dict[str, Transaction]
+        self.spent_outpoints = self.get_dict('spent_outpoints')  # txid -> output_index -> next_txid
+        self.history = self.get_dict('addr_history')             # address -> list of (txid, height)
+        self.verified_tx = self.get_dict('verified_tx3')         # txid -> (height, timestamp, txpos, header_hash)
+        self.tx_fees = self.get_dict('tx_fees')                  # type: Dict[str, TxFeesValue]
         # scripthash -> set of (outpoint, value)
-        self._prevouts_by_scripthash = self.get_data_ref('prevouts_by_scripthash')  # type: Dict[str, Set[Tuple[str, int]]]
-        # convert raw transactions to Transaction objects
-        for tx_hash, raw_tx in self.transactions.items():
-            # note: for performance, "deserialize=False" so that we will deserialize these on-demand
-            self.transactions[tx_hash] = tx_from_any(raw_tx, deserialize=False)
-        # convert prevouts_by_scripthash: list to set, list to tuple
-        for scripthash, lst in self._prevouts_by_scripthash.items():
-            self._prevouts_by_scripthash[scripthash] = {(prevout, value) for prevout, value in lst}
+        self._prevouts_by_scripthash = self.get_dict('prevouts_by_scripthash')  # type: Dict[str, Set[Tuple[str, int]]]
         # remove unreferenced tx
         for tx_hash in list(self.transactions.keys()):
             if not self.get_txi_addresses(tx_hash) and not self.get_txo_addresses(tx_hash):
@@ -943,9 +935,15 @@ class WalletDB(JsonDB):
                 if spending_txid not in self.transactions:
                     self.logger.info("removing unreferenced spent outpoint")
                     d.pop(prevout_n)
-        # convert tx_fees tuples to NamedTuples
-        for tx_hash, tuple_ in self.tx_fees.items():
-            self.tx_fees[tx_hash] = TxFeesValue(*tuple_)
+        # convert invoices
+        # TODO invoices being these contextual dicts even internally,
+        #      where certain keys are only present depending on values of other keys...
+        #      it's horrible. we need to change this, at least for the internal representation,
+        #      to something that can be typed.
+        self.invoices = self.get_dict('invoices')
+        for invoice_key, invoice in self.invoices.items():
+            if invoice.get('type') == PR_TYPE_ONCHAIN:
+                invoice['outputs'] = [PartialTxOutput.from_legacy_tuple(*output) for output in invoice.get('outputs')]
 
     @modifier
     def clear_history(self):
@@ -956,3 +954,42 @@ class WalletDB(JsonDB):
         self.history.clear()
         self.verified_tx.clear()
         self.tx_fees.clear()
+
+    def _convert_dict(self, path, key, v):
+        if key == 'transactions':
+            # note: for performance, "deserialize=False" so that we will deserialize these on-demand
+            v = dict((k, tx_from_any(x, deserialize=False)) for k, x in v.items())
+        elif key == 'adds':
+            v = dict((k, UpdateAddHtlc(*x)) for k, x in v.items())
+        elif key == 'fee_updates':
+            v = dict((k, FeeUpdate(**x)) for k, x in v.items())
+        elif key == 'tx_fees':
+            v = dict((k, TxFeesValue(*x)) for k, x in v.items())
+        elif key == 'prevouts_by_scripthash':
+            v = dict((k, {(prevout, value) for (prevout, value) in x}) for k, x in v.items())
+        elif key == 'buckets':
+            v = dict((k, ShachainElement(bfh(x[0]), int(x[1]))) for k, x in v.items())
+        return v
+
+    def _convert_value(self, path, key, v):
+        if key == 'local_config':
+            v = LocalConfig(**v)
+        elif key == 'remote_config':
+            v = RemoteConfig(**v)
+        elif key == 'constraints':
+            v = ChannelConstraints(**v)
+        elif key == 'funding_outpoint':
+            v = Outpoint(**v)
+        elif key.endswith("_basepoint") or key.endswith("_key"):
+            v = Keypair(**v) if len(v)==2 else OnlyPubkeyKeypair(**v)
+        elif key in [
+                "short_channel_id",
+                "current_per_commitment_point",
+                "next_per_commitment_point",
+                "per_commitment_secret_seed",
+                "current_commitment_signature",
+                "current_htlc_signatures"]:
+            v = binascii.unhexlify(v) if v is not None else None
+        elif len(path) > 2 and path[-2] in ['local_config', 'remote_config'] and key in ["pubkey", "privkey"]:
+            v = binascii.unhexlify(v) if v is not None else None
+        return v