Added Zaif methods.

src/main/java/com/after_sunrise/cryptocurrency/cryptotrader/service/zaif/ZaifBalance.java

@@ -0,0 +1,55 @@
+package com.after_sunrise.cryptocurrency.cryptotrader.service.zaif;
+
+import com.google.gson.annotations.SerializedName;
+import lombok.*;
+
+import java.math.BigDecimal;
+import java.time.Instant;
+import java.util.Map;
+
+/**
+ * @author takanori.takase
+ * @version 0.0.1
+ */
+@Getter
+@Builder
+@ToString
+@AllArgsConstructor(access = AccessLevel.PRIVATE)
+public class ZaifBalance {
+
+    @SerializedName("funds")
+    private Map<String, BigDecimal> funds;
+
+    @SerializedName("deposits")
+    private Map<String, BigDecimal> deposits;
+
+    @SerializedName("rights")
+    private Map<String, BigDecimal> rights;
+
+    @SerializedName("open_orders")
+    private Integer orders;
+
+    @SerializedName("server_time")
+    private Instant timestamp;
+
+    @Getter
+    @Builder
+    @ToString
+    @AllArgsConstructor(access = AccessLevel.PRIVATE)
+    public static class Container {
+
+        private static final Integer SUCCESS = 1;
+
+        @SerializedName("success")
+        private Integer status;
+
+        @SerializedName("return")
+        private ZaifBalance balance;
+
+        public Boolean isSuccess() {
+            return SUCCESS.equals(status) && balance != null;
+        }
+
+    }
+
+}