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df: reinitialize dual-funding

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Prior to this, all reconnect logic lived in channeld. If you
disconnected before we finished building a funding transaction, that was
no big deal. Now, however, we're waiting for the funding to lock in in
dualopend, instead of handing straight to channeld to wait.

So we need a way to restart dualopend.
This commit is contained in:
niftynei
2021-01-07 19:05:06 -06:00
committed by Christian Decker
parent 1b6deaffc8
commit 9fdf1ea32a
12 changed files with 400 additions and 36 deletions
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80
lightningd/dual_open_control.c
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@@ -1803,6 +1803,7 @@ static unsigned int dual_opend_msg(struct subd *dualopend,
/* Messages we send */
case WIRE_DUALOPEND_INIT:
case WIRE_DUALOPEND_REINIT:
case WIRE_DUALOPEND_OPENER_INIT:
case WIRE_DUALOPEND_GOT_OFFER_REPLY:
case WIRE_DUALOPEND_FAIL:
@@ -1863,6 +1864,85 @@ AUTODATA(json_command, &openchannel_update_command);
AUTODATA(json_command, &openchannel_signed_command);
#endif /* EXPERIMENTAL_FEATURES */
void peer_restart_dualopend(struct peer *peer,
struct per_peer_state *pps,
struct channel *channel,
const u8 *send_msg)
{
u32 max_to_self_delay;
struct amount_msat min_effective_htlc_capacity;
struct channel_config unused_config;
int hsmfd;
u8 *msg;
hsmfd = hsm_get_client_fd(peer->ld, &peer->id, channel->dbid,
HSM_CAP_COMMITMENT_POINT
| HSM_CAP_SIGN_REMOTE_TX);
channel_set_owner(channel,
new_channel_subd(peer->ld, "lightning_dualopend",
channel, CHANNEL,
&peer->id,
channel->log, true,
dualopend_wire_name,
dual_opend_msg,
channel_errmsg,
channel_set_billboard,
take(&pps->peer_fd),
take(&pps->gossip_fd),
take(&pps->gossip_store_fd),
take(&hsmfd), NULL));
if (!channel->owner) {
log_broken(channel->log, "Could not subdaemon channel: %s",
strerror(errno));
channel_fail_reconnect_later(channel,
"Failed to subdaemon channel");
return;
}
/* Find the max self delay and min htlc capacity */
channel_config(peer->ld, &unused_config,
&max_to_self_delay,
&min_effective_htlc_capacity);
msg = towire_dualopend_reinit(NULL,
chainparams,
peer->ld->our_features,
peer->their_features,
&channel->our_config,
&channel->channel_info.their_config,
&channel->cid,
max_to_self_delay,
min_effective_htlc_capacity,
pps,
&channel->local_basepoints,
&channel->local_funding_pubkey,
&channel->channel_info.remote_fundingkey,
channel->minimum_depth,
feerate_min(peer->ld, NULL),
feerate_max(peer->ld, NULL),
&channel->funding_txid,
channel->funding_outnum,
channel->funding,
channel->our_msat,
&channel->channel_info.theirbase,
&channel->channel_info.remote_per_commit,
channel->psbt,
channel->opener,
channel->scid != NULL,
channel->remote_funding_locked,
channel->state == CHANNELD_SHUTTING_DOWN,
channel->shutdown_scriptpubkey[REMOTE] != NULL,
channel->shutdown_scriptpubkey[LOCAL],
channel->remote_upfront_shutdown_script,
channel->remote_tx_sigs,
channel->fee_states,
send_msg);
subd_send_msg(channel->owner, take(msg));
}
void peer_start_dualopend(struct peer *peer,
struct per_peer_state *pps,
const u8 *send_msg)