diff --git a/CardInfo.js b/CardInfo.js
index 1cb0d73..b821977 100644
--- a/CardInfo.js
+++ b/CardInfo.js
@@ -125874,13 +125874,11 @@ var CardInfo = {
     ],
     trap: {
       actionAsyn: function () {
-        // TODO: player.payCostOptionalAsyn()
         var cost = {
           costBlue: 3,
           costColorless: 3,
         };
-        if (!this.player.enoughCost(cost)) return;
-        return this.player.payCostAsyn(cost,true).callback(this,function (costArg) {
+        return this.player.payCostOptionalAsyn(cost).callback(this,function (costArg) {
           if (costArg) return;
           return this.game.bounceCardsAsyn(this.player.opponent.signis);
         });
@@ -128849,7 +128847,7 @@ var CardInfo = {
         return this.player.selectOptionalAsyn('LAUNCH',cards).callback(this,function (card) {
           if (!card) return;
           return this.player.opponent.showCardsAsyn([card]).callback(this,function () {
-            return this.player.payCostAsyn(cost,true).callback(this,function (costArg) {
+            return this.player.payCostOptionalAsyn(cost).callback(this,function (costArg) {
               if (!costArg) return;
               // TODO: source
               return card.handleTrapAsyn(null,this);
@@ -129252,8 +129250,7 @@ var CardInfo = {
         var cost = {
           costBlue: 1,
         };
-        if (!this.player.enoughCost(cost)) return;
-        return this.player.payCostAsyn(cost,true).callback(this,function (costArg) {
+        return this.player.payCostOptionalAsyn(cost,true).callback(this,function (costArg) {
           if (!costArg) return;
           if (event) {
             event.wontBeDamaged = true;
@@ -129796,8 +129793,7 @@ var CardInfo = {
         var cost = {
           costBlue: 1,
         };
-        if (!this.player.enoughCost(cost)) return;
-        return this.player.payCostAsyn(cost,true).callback(this,function (costArg) {
+        return this.player.payCostOptionalAsyn(cost).callback(this,function (costArg) {
           if (!costArg) return;
           return this.banishSigniAsyn();
         });
diff --git a/Player.js b/Player.js
index 3a2c594..c959960 100644
--- a/Player.js
+++ b/Player.js
@@ -1925,6 +1925,11 @@ Player.prototype.payCostAsyn = function (obj,cancelable) {
 	});
 };
 
+Player.prototype.payCostOptionalAsyn = function(cost) {
+  if (!this.enoughCost(cost)) return Callback.immediately(null);
+  return this.payCostAsyn(cost,true);
+};
+
 // player.selectAsyn(label,cards,optional,needConfirm)
 // 玩家从cards中选一张卡,
 // 若cards为null或空数组: