Function handle_peer_tx_sigs_msg

lightningd/dual_open_control.c:2319–2431

}

static void handle_peer_tx_sigs_msg(struct subd *dualopend,
				    const u8 *msg)
{
	struct wally_psbt *psbt;
	const struct wally_tx *wtx;
	struct lightningd *ld = dualopend->ld;
	struct channel *channel = dualopend->channel;
	struct channel_inflight *inflight;

	if (!fromwire_dualopend_funding_sigs(tmpctx, msg, &psbt)) {
		channel_internal_error(channel,
				       "Bad DUALOPEND_FUNDING_SIGS: %s",
				       tal_hex(tmpctx, msg));
		return;
	}

	inflight = channel_current_inflight(channel);
	if (!inflight) {
		channel_internal_error(channel,
				       "No inflight found for channel");
		return;
	}

	/* 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 */
	inflight->remote_tx_sigs = true;
	tal_wally_start();
	if (wally_psbt_combine(inflight->funding_psbt, psbt) != WALLY_OK) {
		channel_internal_error(channel,
				       "Unable to combine PSBTs: %s, %s",
				       fmt_wally_psbt(tmpctx,
						      inflight->funding_psbt),
				       fmt_wally_psbt(tmpctx,
						      psbt));
		tal_wally_end(inflight->funding_psbt);
		return;
	}
	tal_wally_end(inflight->funding_psbt);
	wallet_inflight_save(ld->wallet, inflight);

	/* It's possible we haven't sent them our (empty) tx-sigs yet,
	 * but we should be sending it soon... */
	if (psbt_finalize(cast_const(struct wally_psbt *,
			  inflight->funding_psbt))
	    && !inflight->tx_broadcast) {
		inflight->tx_broadcast = true;

		/* Saves the now finalized version of the psbt */
		wallet_inflight_save(ld->wallet, inflight);
		wtx = psbt_final_tx(tmpctx, inflight->funding_psbt);
		if (!wtx) {
			channel_internal_error(channel,
					       "Unable to extract final tx"
					       " from PSBT %s",
					       fmt_wally_psbt(tmpctx,
							      inflight->funding_psbt));
			return;