core-lightning/gossipd/gossip_peerd_wire.csv

# These must be distinct from WIRE_CHANNEL_ANNOUNCEMENT etc. gossip msgs!
# Channel daemon can ask for updates for a specific channel, for sending
# errors.  
gossipd_get_update,3501
gossipd_get_update,,short_channel_id,struct short_channel_id

# If channel isn't known, update will be empty.
gossipd_get_update_reply,3601
gossipd_get_update_reply,,len,u16
gossipd_get_update_reply,,update,len*u8

# Both sides have seen the funding tx being locked, but we have not
# yet reached the announcement depth. So we add the channel locally so
# we (and peer) can update it already.
gossipd_local_add_channel,3503
gossipd_local_add_channel,,short_channel_id,struct short_channel_id
gossipd_local_add_channel,,remote_node_id,struct node_id
gossipd_local_add_channel,,satoshis,struct amount_sat

# Send this channel_update.
gossipd_local_channel_update,3504
gossipd_local_channel_update,,short_channel_id,struct short_channel_id
gossipd_local_channel_update,,disable,bool
gossipd_local_channel_update,,cltv_expiry_delta,u16
gossipd_local_channel_update,,htlc_minimum_msat,struct amount_msat
gossipd_local_channel_update,,fee_base_msat,u32
gossipd_local_channel_update,,fee_proportional_millionths,u32
gossipd_local_channel_update,,htlc_maximum_msat,struct amount_msat

# Update your gossip_store fd: + gossip_store_fd
gossipd_new_store_fd,3505
# How much shorter the new store is, so you can offset streaming.
gossipd_new_store_fd,,offset_shorter,u64