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df-open: preliminary handling for tx_sigs message

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Missing some thing still (like persistence and broadcasting the tx)
This commit is contained in:
niftynei
2020-09-10 14:47:00 -05:00
committed by Rusty Russell
parent 8858ae4f3d
commit 0df818c53c
1 changed files with 76 additions and 1 deletions
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77
channeld/channeld.c
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@@ -1978,6 +1978,81 @@ static void send_onionmsg(struct peer *peer, const u8 *msg)
onion_routing_packet,
tlvs)));
}
static void handle_tx_sigs(struct peer *peer, const u8 *msg)
{
struct channel_id cid;
struct bitcoin_txid txid;
const struct witness_stack **ws;
const struct wally_tx *wtx;
size_t j = 0;
if (!fromwire_tx_signatures(tmpctx, msg, &cid, &txid,
cast_const3(
struct witness_stack ***,
&ws)))
peer_failed(peer->pps,
&peer->channel_id,
"Bad tx_signatures %s", tal_hex(msg, msg));
/* Check that we're in the right spot for this channel to have gotten
* this message */
if (peer->funding_locked[LOCAL] || peer->funding_locked[REMOTE]) {
/* FIXME: should we fail here instead? */
status_unusual("Got WIRE_TX_SIGNATURES after funding locked "
"for channel %s, ignoring: %s",
type_to_string(tmpctx, struct channel_id,
&peer->channel_id),
tal_hex(tmpctx, msg));
return;
}
if (!peer->psbt) {
status_broken("Got WIRE_TX_SIGNATURES with no PSBT "
"for channel %s, ignoring: %s",
type_to_string(tmpctx, struct channel_id,
&peer->channel_id),
tal_hex(tmpctx, msg));
return;
}
/* We put the PSBT + sigs all together */
for (size_t i = 0; i < peer->psbt->num_inputs; i++) {
struct wally_psbt_input *in =
&peer->psbt->inputs[i];
const struct witness_element **elem;
/* Really we should check serial parity, but we can
* cheat and only check that the final witness
* stack hasn't been set yet */
if (in->final_witness)
continue;
if (j == tal_count(ws))
peer_failed(peer->pps, &peer->channel_id,
"Mismatch witness stack count %s",
tal_hex(msg, msg));
elem = cast_const2(const struct witness_element **,
ws[j++]->witness_element);
psbt_input_set_final_witness_stack(in, elem);
}
/* Then we broadcast it, and let the command know we did it */
if (!psbt_finalize(peer->psbt))
peer_failed(peer->pps, &peer->channel_id,
"Unable to finalize PSBT %s",
type_to_string(tmpctx, struct wally_psbt, peer->psbt));
wtx = psbt_final_tx(tmpctx, peer->psbt);
if (!wtx)
peer_failed(peer->pps, &peer->channel_id,
"Unable to extract funding_tx from finalized PSBT %s",
type_to_string(tmpctx, struct wally_psbt, peer->psbt));
/* FIXME: when a channel gets locked, check if there's a PSBT
* or open_channel hanging out for it! */
peer->psbt = tal_free(peer->psbt);
}
#endif /* EXPERIMENTAL_FEATURES */
static void handle_unexpected_reestablish(struct peer *peer, const u8 *msg)
@@ -2110,7 +2185,7 @@ static void peer_in(struct peer *peer, const u8 *msg)
handle_onion_message(peer, msg);
return;
case WIRE_TX_SIGNATURES:
/* FIXME: verify sigs + weights, broadcast funding tx */
handle_tx_sigs(peer, msg);
return;
case WIRE_INIT_RBF:
/* FIXME: handle this here */