mfc-df: after psbt signed, send to openchannel_signed if v2s

If there's an v2 destinations, they'll broadcast the tx for us

plugins/spender/multifundchannel.c

@@ -1566,6 +1566,13 @@ after_signpsbt(struct command *cmd,
 			   json_tok_full_len(field),
 			   json_tok_full(buf, field));
 
+	if (!psbt_finalize(psbt))
+		plugin_err(mfc->cmd->plugin,
+			   "mfc %"PRIu64": Signed PSBT won't finalize"
+			   "%s", mfc->id,
+			   type_to_string(tmpctx, struct wally_psbt, psbt));
+
+
 	/* Replace the PSBT.  */
 	tal_free(mfc->psbt);
 	mfc->psbt = tal_steal(mfc, psbt);
@@ -1599,10 +1606,23 @@ after_signpsbt(struct command *cmd,
 	*/
 	for (size_t i = 0; i < tal_count(mfc->destinations); ++i) {
 		struct multifundchannel_destination *dest;
+		enum multifundchannel_state expected_state;
+
 		dest = &mfc->destinations[i];
+
+		/* Check that every dest is in the right state */
+		expected_state = dest->protocol == OPEN_CHANNEL ?
+			MULTIFUNDCHANNEL_SIGNED : MULTIFUNDCHANNEL_COMPLETED;
+		assert(dest->state == expected_state);
+
 		dest->state = MULTIFUNDCHANNEL_DONE;
 	}
 
+	/* If there's any v2's, we send the tx via `openchannel_signed` */
+	if (dest_count(mfc, OPEN_CHANNEL) > 0) {
+		return perform_openchannel_signed(mfc);
+	}
+
 	plugin_log(mfc->cmd->plugin, LOG_DBG,
 		   "mfc %"PRIu64": sendpsbt.", mfc->id);
 

plugins/spender/openchannel.c

@@ -484,25 +484,10 @@ perform_openchannel_signed(struct multifundchannel_command *mfc)
 		   "mfc %"PRIu64": parallel `openchannel_signed`.",
 		   mfc->id);
 
-	/* Check that every dest is in the right state */
-	for (size_t i = 0; i < tal_count(mfc->destinations); i++) {
-		struct multifundchannel_destination *dest;
-		dest = &mfc->destinations[i];
-		if (dest->state != MULTIFUNDCHANNEL_SIGNED) {
-			// FIXME: these channels are all borked.
-			redo_multifundchannel(mfc, "openchannel_signed");
-		}
-	}
-
-	if (!psbt_finalize(mfc->psbt))
-		plugin_err(mfc->cmd->plugin,
-			   "mfc %"PRIu64": Unable to finalize parent PSBT "
-			   "%s",
-			   type_to_string(tmpctx, struct wally_psbt,
-					  mfc->psbt));
-
-	mfc->pending = tal_count(mfc->destinations);
+	mfc->pending = dest_count(mfc, OPEN_CHANNEL);
 	for (size_t i = 0; i < tal_count(mfc->destinations); i++) {
+		if (mfc->destinations[i].protocol == FUND_CHANNEL)
+			continue;
 		/* We need to 'port' all of the sigs down to the
 		 * destination PSBTs */
 		update_node_psbt(mfc, mfc->psbt,