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gossip: Add local channels when channeld tells us to

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This adds the channel from us to the remote node and activates it with
our local parameters.

Signed-off-by: Christian Decker <decker.christian@gmail.com>
This commit is contained in:
Christian Decker 2017-12-15 23:20:13 +01:00 • committed by Rusty Russell
parent ecde138071
commit da0792e69c
1 changed files with 51 additions and 0 deletions
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51
gossipd/gossip.c
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@ -9,6 +9,7 @@
#include <ccan/mem/mem.h>
#include <ccan/noerr/noerr.h>
#include <ccan/read_write_all/read_write_all.h>
#include <ccan/structeq/structeq.h>
#include <ccan/take/take.h>
#include <ccan/tal/str/str.h>
#include <ccan/timer/timer.h>
@ -737,6 +738,48 @@ reply:
daemon_conn_send(peer->remote, take(msg));
}
static void handle_local_add_channel(struct peer *peer, u8 *msg)
{
struct routing_state *rstate = peer->daemon->rstate;
struct short_channel_id scid;
struct sha256_double chain_hash;
struct pubkey remote_node_id;
u16 flags, cltv_expiry_delta, direction;
u32 fee_base_msat, fee_proportional_millionths;
u64 htlc_minimum_msat;
struct node_connection *c;
if (!fromwire_gossip_local_add_channel(
msg, NULL, &scid, &chain_hash, &remote_node_id, &flags,
&cltv_expiry_delta, &htlc_minimum_msat, &fee_base_msat,
&fee_proportional_millionths)) {
status_trace("Unable to parse local_add_channel message: %s", tal_hex(msg, msg));
return;
}
if (!structeq(&chain_hash, &rstate->chain_hash)) {
status_trace("Received channel_announcement for unknown chain %s",
type_to_string(msg, struct sha256_double,&chain_hash));
return;
}
if (get_connection_by_scid(rstate, &scid, 0) || get_connection_by_scid(rstate, &scid, 0)) {
status_trace("Attempted to local_add_channel a know channel");
return;
}
direction = get_channel_direction(&rstate->local_id, &remote_node_id);
c = half_add_connection(rstate, &rstate->local_id, &remote_node_id, &scid, direction);
c->active = true;
c->last_timestamp = 0;
c->delay = cltv_expiry_delta;
c->htlc_minimum_msat = htlc_minimum_msat;
c->base_fee = fee_base_msat;
c->proportional_fee = fee_proportional_millionths;
status_trace("Added and updated local channel %s/%d", type_to_string(msg, struct short_channel_id, &scid), direction);
}
/**
* owner_msg_in - Called by the `peer->owner_conn` upon receiving a
* message
@ -753,7 +796,15 @@ static struct io_plan *owner_msg_in(struct io_conn *conn,
handle_gossip_msg(peer->daemon, dc->msg_in);
} else if (type == WIRE_GOSSIP_GET_UPDATE) {
handle_get_update(peer, dc->msg_in);
} else if (type == WIRE_GOSSIP_LOCAL_ADD_CHANNEL) {
handle_local_add_channel(peer, dc->msg_in);
} else {
status_failed(
STATUS_FAIL_INTERNAL_ERROR,
"Gossip received unknown message of type %s from owner",
gossip_wire_type_name(type));
}
return daemon_conn_read_next(conn, dc);
}