diff --git a/build.gradle b/build.gradle
index 6380e55..c6c37e4 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,5 +1,5 @@
 group = 'com.hiczp'
-version = '0.0.7'
+version = '0.0.8'
 description = 'Bilibili android client API library written in Java'
 
 apply plugin: 'idea'
diff --git a/src/main/java/com/hiczp/bilibili/api/ServerErrorCode.java b/src/main/java/com/hiczp/bilibili/api/ServerErrorCode.java
index 2445a46..be89649 100644
--- a/src/main/java/com/hiczp/bilibili/api/ServerErrorCode.java
+++ b/src/main/java/com/hiczp/bilibili/api/ServerErrorCode.java
@@ -38,6 +38,8 @@ public class ServerErrorCode {
         public static final int USER_NO_LOGIN = 3;
         //"请登录"
         public static final int PLEASE_LOGIN = 401;
+        //"每天最多能兑换 1 个"
+        public static final int FORBIDDEN = 403;
         //"请登录"
         public static final int PLEASE_LOGIN0 = 32205;
         //"请先登录"
diff --git a/src/main/java/com/hiczp/bilibili/api/live/LiveService.java b/src/main/java/com/hiczp/bilibili/api/live/LiveService.java
index 057ca49..f60b4be 100644
--- a/src/main/java/com/hiczp/bilibili/api/live/LiveService.java
+++ b/src/main/java/com/hiczp/bilibili/api/live/LiveService.java
@@ -214,12 +214,21 @@ public interface LiveService {
     //是的, 你没看错, 是 GET 方式
     @GET("AppUser/wearTitle")
     Call<WearTitleResponseEntity> wearTitle(@Query("title") String title);
+    //TODO 取消佩戴
 
     //TODO 获奖记录
 
-    //TODO 瓜子商店
+    //瓜子商店
     //侧拉抽屉 -> 直播中心 -> 瓜子商店 -> 银瓜子兑换 -> 硬币银瓜子互换 ->　兑换硬币
     //将 700 银瓜子兑换为 1 硬币, 每个用户每天只能换一次
+    //actionKey 是固定值, 为 "appkey"
+    //已经兑换过时返回 403
+    @POST("AppExchange/silver2coin")
+    Call<Silver2CoinResponseEntity> silver2Coin(@Query("actionKey") String actionKey);
+
+    default Call<Silver2CoinResponseEntity> silver2Coin() {
+        return silver2Coin("appkey");
+    }
 
     //扭蛋机
     //侧拉抽屉 -> 直播中心 -> 扭蛋机 -> 普通扭蛋
diff --git a/src/main/java/com/hiczp/bilibili/api/live/entity/Silver2CoinResponseEntity.java b/src/main/java/com/hiczp/bilibili/api/live/entity/Silver2CoinResponseEntity.java
new file mode 100644
index 0000000..9b6260c
--- /dev/null
+++ b/src/main/java/com/hiczp/bilibili/api/live/entity/Silver2CoinResponseEntity.java
@@ -0,0 +1,103 @@
+package com.hiczp.bilibili.api.live.entity;
+
+import com.google.gson.annotations.SerializedName;
+
+public class Silver2CoinResponseEntity {
+    /**
+     * code : 0
+     * msg : 兑换成功
+     * message : 兑换成功
+     * data : {"silver":"22494","gold":"0","tid":"e32cb3fc6bca9a7dff343469b1ff981f2123","coin":1}
+     */
+
+    @SerializedName("code")
+    private int code;
+    @SerializedName("msg")
+    private String msg;
+    @SerializedName("message")
+    private String message;
+    @SerializedName("data")
+    private Data data;
+
+    public int getCode() {
+        return code;
+    }
+
+    public void setCode(int code) {
+        this.code = code;
+    }
+
+    public String getMsg() {
+        return msg;
+    }
+
+    public void setMsg(String msg) {
+        this.msg = msg;
+    }
+
+    public String getMessage() {
+        return message;
+    }
+
+    public void setMessage(String message) {
+        this.message = message;
+    }
+
+    public Data getData() {
+        return data;
+    }
+
+    public void setData(Data data) {
+        this.data = data;
+    }
+
+    public static class Data {
+        /**
+         * silver : 22494
+         * gold : 0
+         * tid : e32cb3fc6bca9a7dff343469b1ff981f2123
+         * coin : 1
+         */
+
+        @SerializedName("silver")
+        private String silver;
+        @SerializedName("gold")
+        private String gold;
+        @SerializedName("tid")
+        private String tid;
+        @SerializedName("coin")
+        private int coin;
+
+        public String getSilver() {
+            return silver;
+        }
+
+        public void setSilver(String silver) {
+            this.silver = silver;
+        }
+
+        public String getGold() {
+            return gold;
+        }
+
+        public void setGold(String gold) {
+            this.gold = gold;
+        }
+
+        public String getTid() {
+            return tid;
+        }
+
+        public void setTid(String tid) {
+            this.tid = tid;
+        }
+
+        public int getCoin() {
+            return coin;
+        }
+
+        public void setCoin(int coin) {
+            this.coin = coin;
+        }
+    }
+}