Function openchannel2_sign_hook_cb

lightningd/dual_open_control.c:1062–1132

}

static void
openchannel2_sign_hook_cb(struct openchannel2_psbt_payload *payload STEALS)
{
	struct channel *channel = payload->channel;
	struct channel_inflight *inflight;
	struct bitcoin_txid txid;
	u8 *msg;

	/* Whatever happens, we free the payload */
	tal_steal(tmpctx, payload);

	/* Finalize it, if not already. It shouldn't work entirely */
	psbt_finalize(payload->psbt);

	if (!psbt_side_finalized(payload->psbt, TX_ACCEPTER)) {
		log_broken(channel->log,
			   "Plugin must return a 'psbt' with signatures "
			   "for their inputs %s",
			   fmt_wally_psbt(tmpctx,
					  payload->psbt));
		msg = towire_dualopend_fail(NULL, "Peer error with PSBT"
					    " signatures.");
		goto send_msg;
	}

	inflight = channel_current_inflight(channel);
	if (!inflight) {
		log_broken(channel->log,
			   "No current channel inflight");
		msg = towire_dualopend_fail(NULL, "No current channel inflight");
		goto send_msg;
	}

	/* Check that we've got the same / correct PSBT */
	psbt_txid(NULL, payload->psbt, &txid, NULL);
	if (!bitcoin_txid_eq(&inflight->funding->outpoint.txid, &txid)) {
		log_broken(channel->log,
			   "PSBT's txid does not match. %s != %s",
			   fmt_bitcoin_txid(tmpctx, &txid),
			   fmt_bitcoin_txid(tmpctx,
					    &inflight->funding->outpoint.txid));
		msg = towire_dualopend_fail(NULL, "Peer error with PSBT"
					    " signatures.");
		goto send_msg;
	}

	/* Now that we've got the signed PSBT, save it */
	tal_free(inflight->funding_psbt);
	inflight->funding_psbt = tal_steal(inflight,
					   cast_const(struct wally_psbt *,
						      payload->psbt));
	wallet_inflight_save(payload->ld->wallet, inflight);
	watch_opening_inflight(payload->ld, inflight);
	msg = towire_dualopend_send_tx_sigs(NULL, inflight->funding_psbt);

send_msg:
	/* Peer's gone away, let's try reconnecting */
	if (!payload->dualopend) {