def get_channel_by_short_id(self, short_channel_id: bytes) -> Optional[Channel]:
    for chan in self.channels.values():
        if (chan.short_channel_id == short_channel_id):
            return chan
def get_channel_by_short_id(self, short_channel_id: bytes) -> Optional[Channel]:
    for chan in self.channels.values():
        if (chan.short_channel_id == short_channel_id):
            return chan