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df: move to inflights for sigs/openchannel_signed parts of flow

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We create an inflight once we get the commitment tx for a channel
instead of once we get the funding transaction signatures
This commit is contained in:
niftynei 2021-01-19 19:34:53 -06:00 committed by neil saitug
parent 8b0e88dfb3
commit 3da2ae4d30
1 changed files with 60 additions and 26 deletions
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86
lightningd/dual_open_control.c
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@ -1243,9 +1243,8 @@ static void handle_peer_tx_sigs_sent(struct subd *dualopend,
const u8 *msg)
{
struct channel *channel = dualopend->channel;
struct channel_inflight *inflight;
const struct wally_tx *wtx;
/* FIXME: psbt? */
struct wally_psbt *psbt = NULL;
if (!fromwire_dualopend_tx_sigs_sent(msg)) {
channel_internal_error(channel,
@ -1254,21 +1253,28 @@ static void handle_peer_tx_sigs_sent(struct subd *dualopend,
return;
}
if (psbt_finalize(cast_const(struct wally_psbt *, psbt))) {
wtx = psbt_final_tx(NULL, psbt);
inflight = channel_current_inflight(channel);
if (psbt_finalize(inflight->funding_psbt)
&& inflight->remote_tx_sigs) {
wtx = psbt_final_tx(NULL, inflight->funding_psbt);
if (!wtx) {
/* FIXME: what's the ideal error handling here? */
channel_internal_error(channel,
"Unable to extract final tx"
" from PSBT %s",
type_to_string(tmpctx,
struct wally_psbt,
psbt));
inflight->funding_psbt));
return;
}
send_funding_tx(channel, take(wtx));
channel_set_state(channel, DUALOPEND_OPEN_INIT,
/* Must be in an "init" state */
assert(channel->state == DUALOPEND_OPEN_INIT
|| channel->state == DUALOPEND_AWAITING_LOCKIN);
channel_set_state(channel, channel->state,
DUALOPEND_AWAITING_LOCKIN,
REASON_UNKNOWN,
"Sigs exchanged, waiting for lock-in");
@ -1513,7 +1519,7 @@ static void handle_peer_tx_sigs_msg(struct subd *dualopend,
const struct wally_tx *wtx;
struct lightningd *ld = dualopend->ld;
struct channel *channel = dualopend->channel;
struct wally_psbt *chan_psbt = NULL;
struct channel_inflight *inflight;
if (!fromwire_dualopend_funding_sigs(tmpctx, msg, &psbt)) {
channel_internal_error(channel,
@ -1522,36 +1528,40 @@ static void handle_peer_tx_sigs_msg(struct subd *dualopend,
return;
}
inflight = channel_current_inflight(channel);
/* Save that we've gotten their sigs. Sometimes
* the peer doesn't send any sigs (no inputs), otherwise
* we could just check the PSBT was finalized */
// FIXME: inflight->remote_tx_sigs = true;
inflight->remote_tx_sigs = true;
tal_wally_start();
if (wally_psbt_combine(chan_psbt, psbt) != WALLY_OK) {
if (wally_psbt_combine(inflight->funding_psbt, psbt) != WALLY_OK) {
channel_internal_error(channel,
"Unable to combine PSBTs: %s, %s",
type_to_string(tmpctx,
struct wally_psbt,
chan_psbt),
inflight->funding_psbt),
type_to_string(tmpctx,
struct wally_psbt,
psbt));
tal_wally_end(chan_psbt);
tal_wally_end(inflight->funding_psbt);
return;
}
tal_wally_end(chan_psbt);
tal_wally_end(inflight->funding_psbt);
wallet_inflight_save(ld->wallet, inflight);
if (psbt_finalize(cast_const(struct wally_psbt *, chan_psbt))) {
wtx = psbt_final_tx(NULL, chan_psbt);
if (psbt_finalize(cast_const(struct wally_psbt *, inflight->funding_psbt))) {
wallet_inflight_save(ld->wallet, inflight);
wtx = psbt_final_tx(NULL, inflight->funding_psbt);
if (!wtx) {
channel_internal_error(channel,
"Unable to extract final tx"
" from PSBT %s",
type_to_string(tmpctx,
struct wally_psbt,
chan_psbt));
inflight->funding_psbt));
return;
}
send_funding_tx(channel, take(wtx));
channel_set_state(channel, DUALOPEND_OPEN_INIT,
@ -1570,10 +1580,9 @@ static void handle_peer_tx_sigs_msg(struct subd *dualopend,
&channel->remote_funding_locked);
}
wallet_channel_save(ld->wallet, channel);
/* Send notification with peer's signed PSBT */
notify_openchannel_peer_sigs(ld, &channel->cid, chan_psbt);
notify_openchannel_peer_sigs(ld, &channel->cid,
inflight->funding_psbt);
}
static void handle_validate_rbf(struct subd *dualopend,
@ -1681,8 +1690,7 @@ json_openchannel_signed(struct command *cmd,
struct channel_id *cid;
struct channel *channel;
struct bitcoin_txid txid;
/* FIXME: use inflight? */
struct wally_psbt *chan_psbt = NULL;
struct channel_inflight *inflight;
if (!param(cmd, buffer, params,
p_req("channel_id", param_channel_id, &cid),
@ -1716,33 +1724,59 @@ json_openchannel_signed(struct command *cmd,
type_to_string(tmpctx, struct bitcoin_txid,
&txid));
inflight = list_tail(&channel->inflights,
struct channel_inflight,
list);
if (!inflight)
return command_fail(cmd, LIGHTNINGD,
"Open attempt for channel not found");
if (!bitcoin_txid_eq(&txid, &inflight->funding->txid))
return command_fail(cmd, LIGHTNINGD,
"Current inflight transaction is %s,"
" not %s",
type_to_string(tmpctx, struct bitcoin_txid,
&txid),
type_to_string(tmpctx, struct bitcoin_txid,
&inflight->funding->txid));
if (inflight->funding_psbt && psbt_is_finalized(inflight->funding_psbt))
return command_fail(cmd, LIGHTNINGD,
"Already have a finalized PSBT for "
"this channel");
/* Go ahead and try to finalize things, or what we can */
psbt_finalize(psbt);
/* Check that all of *our* outputs are finalized */
if (!psbt_side_finalized(psbt, TX_INITIATOR))
if (!psbt_side_finalized(psbt, channel->opener == LOCAL ?
TX_INITIATOR : TX_ACCEPTER))
return command_fail(cmd, FUNDING_PSBT_INVALID,
"Local PSBT input(s) not finalized");
/* Now that we've got the signed PSBT, save it */
tal_wally_start();
if (wally_psbt_combine(cast_const(struct wally_psbt *, chan_psbt),
if (wally_psbt_combine(cast_const(struct wally_psbt *,
inflight->funding_psbt),
psbt) != WALLY_OK) {
tal_wally_end(tal_free(psbt));
tal_wally_end(tal_free(inflight->funding_psbt));
return command_fail(cmd, FUNDING_PSBT_INVALID,
"Failed adding sigs");
}
/* Make memleak happy, (otherwise cleaned up with `cmd`) */
tal_free(psbt);
tal_wally_end(tal_steal(channel, chan_psbt));
tal_wally_end(tal_steal(inflight, inflight->funding_psbt));
wallet_channel_save(cmd->ld->wallet, channel);
/* Update the PSBT on disk */
wallet_inflight_save(cmd->ld->wallet, inflight);
/* Uses the channel->funding_txid, which we verified above */
channel_watch_funding(cmd->ld, channel);
/* Send our tx_sigs to the peer */
subd_send_msg(channel->owner,
take(towire_dualopend_send_tx_sigs(NULL, chan_psbt)));
take(towire_dualopend_send_tx_sigs(NULL,
inflight->funding_psbt)));
channel->openchannel_signed_cmd = tal_steal(channel, cmd);
return command_still_pending(cmd);