fix: 保留小程序纯签约 version 字段兼容性

weixin-java-pay/src/main/java/com/github/binarywang/wxpay/bean/request/WxMaEntrustRequest.java

@@ -6,6 +6,7 @@
 import com.google.gson.GsonBuilder;
 import com.google.gson.annotations.SerializedName;
 import com.thoughtworks.xstream.annotations.XStreamAlias;
+import com.thoughtworks.xstream.annotations.XStreamOmitField;
 import lombok.*;
 import me.chanjar.weixin.common.annotation.Required;
 
@@ -101,18 +102,12 @@ public class WxMaEntrustRequest extends BaseWxPayRequest {
   private String notifyUrl;
 
   /**
-   * <pre>
-   * 版本号
-   * sign
-   * 是
-   * string(8)
-   * 1.0
-   * 固定值1.0
-   * </pre>
+   * @deprecated 小程序纯签约接口不支持该参数，设置后不会参与请求序列化或签名。
    */
-  @Required
+  @Deprecated
+  @XStreamOmitField
   @XStreamAlias("version")
-  private String version;
+  private transient String version;
 
 
   /**
@@ -155,6 +150,11 @@ protected boolean needNonceStr() {
     return false;
   }
 
+  @Override
+  protected String[] getIgnoredParamsForSign() {
+    return new String[]{"version"};
+  }
+
   @Override
   protected void storeMap(Map<String, String> map) {
     map.put("plan_id", planId);

weixin-java-pay/src/test/java/com/github/binarywang/wxpay/bean/request/WxMaEntrustRequestTest.java

@@ -0,0 +1,46 @@
+package com.github.binarywang.wxpay.bean.request;
+
+import com.github.binarywang.wxpay.config.WxPayConfig;
+import com.github.binarywang.wxpay.constant.WxPayConstants;
+import com.github.binarywang.wxpay.util.SignUtils;
+import com.github.binarywang.wxpay.util.XmlConfig;
+import org.testng.annotations.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link WxMaEntrustRequest}.
+ */
+public class WxMaEntrustRequestTest {
+
+  @Test
+  public void versionIsExcludedFromPayloadAndSignature() throws Exception {
+    WxMaEntrustRequest request = WxMaEntrustRequest.newBuilder()
+      .planId("plan-id")
+      .contractCode("contract-code")
+      .requestSerial(1L)
+      .contractDisplayAccount("account")
+      .notifyUrl("https://example.com/notify")
+      .timestamp("1710000000")
+      .version("1.0")
+      .build();
+    WxPayConfig config = new WxPayConfig();
+    config.setAppId("wx-app-id");
+    config.setMchId("mch-id");
+    config.setMchKey("mch-key");
+
+    request.checkAndSign(config);
+
+    assertThat(request.toString()).doesNotContain("version");
+    assertThat(request.toXML()).doesNotContain("<version>");
+    boolean fastMode = XmlConfig.fastMode;
+    try {
+      XmlConfig.fastMode = true;
+      assertThat(request.toXML()).doesNotContain("<version>");
+    } finally {
+      XmlConfig.fastMode = fastMode;
+    }
+    assertThat(request.getSign()).isEqualTo(SignUtils.createSign(
+      request, WxPayConstants.SignType.MD5, config.getMchKey(), new String[]{"version"}));
+  }
+}