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pyln-client/gossmap: adds GossmapHalfchannel objects

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Michael Schmoock 2021-09-07 13:39:16 +09:30 • committed by Rusty Russell
parent 75126a0997
commit fd16535f68
1 changed files with 34 additions and 3 deletions
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37
contrib/pyln-client/pyln/client/gossmap.py
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@ -29,8 +29,22 @@ class GossipStoreHeader(object):
self.length = (length & GOSSIP_STORE_LEN_MASK)
class GossmapHalfchannel(object):
"""One direction of a GossmapChannel."""
def __init__(self, timestamp: int,
cltv_expiry_delta: int,
htlc_minimum_msat: int, htlc_maximum_msat: int,
fee_base_msat: int, fee_proportional_millionths: int):
self.timestamp: int = timestamp
self.cltv_expiry_delta: int = cltv_expiry_delta
self.htlc_minimum_msat: int = htlc_minimum_msat
self.htlc_maximum_msat: Optional[int] = htlc_maximum_msat
self.fee_base_msat: int = fee_base_msat
self.fee_proportional_millionths: int = fee_proportional_millionths
class GossmapChannel(object):
"""A channel: fields of channel_announcement are in .fields, optional updates are in .updates_fields, which can be None of there has been no channel update."""
"""A channel: fields of channel_announcement are in .fields, optional updates are in .updates_fields, which can be None if there has been no channel update."""
def __init__(self,
fields: Dict[str, Any],
announce_offset: int,
@ -47,6 +61,24 @@ class GossmapChannel(object):
self.updates_fields: List[Optional[Dict[str, Any]]] = [None, None]
self.updates_offset: List[Optional[int]] = [None, None]
self.capacity = None # TODO: where do we get this?
self.half_channels: List[GossmapHalfchannel] = [None, None]
def update_channel(self,
direction: int,
fields: List[Optional[Dict[str, Any]]] = [None, None],
off: List[Optional[int]] = [None, None]):
self.updates_fields[direction] = fields
self.updates_offset = off
half = GossmapHalfchannel(fields['timestamp'],
fields['cltv_expiry_delta'],
fields['htlc_minimum_msat'],
fields.get('htlc_maximum_msat', None),
fields['fee_base_msat'],
fields['fee_proportional_millionths'])
self.half_channels[direction] = half
class GossmapNodeId(object):
def __init__(self, buf: bytes):
@ -138,8 +170,7 @@ class Gossmap(object):
fields = channel_update.read(io.BytesIO(rec[2:]), {})
direction = fields['channel_flags'] & 1
c = self.channels[ShortChannelId.from_int(fields['short_channel_id'])]
c.updates_fields[direction] = fields
c.updates_offset = off
c.update_channel(direction, fields, off)
def add_node_announcement(self, rec: bytes, off: int):
fields = node_announcement.read(io.BytesIO(rec[2:]), {})