Function billboard_update

openingd/dualopend.c:384–392

}

static void billboard_update(struct state *state)
{
	const char *update = billboard_message(tmpctx, state->channel_ready,
					       NULL,
					       state->shutdown_sent,
					       0, /* Always zero? */
					       0);
	peer_billboard(false, update);
}

static void send_shutdown(struct state *state, const u8 *final_scriptpubkey)
{