Google API验证非续订/预付费订阅时出现内购错误

我在应用中集成了Google Play非续订订阅服务，所有配置已完成，但云函数无法正常验证相关交易。

使用TypeScript/Node.js函数结合googleapis的androidpublisher_v3库，验证非续订订阅时，调用Purchases.products:get接口触发404错误，具体日志如下：

could not verify the purchase because of error GaxiosError: The document type is not supported. 
at Gaxios._request (/workspace/node_modules/gaxios/build/src/gaxios.js:136:23) 
at process.processTicksAndRejections (node:internal/process/task_queues:95:5) 
at async JWT.requestAsync (/workspace/node_modules/google-auth-library/build/src/auth/oauth2client.js:408:18) 
at async GooglePlayPurchaseHandler.handleNonSubscription (/workspace/lib/google-play.purchase-handler.js:85:30)  
at async /workspace/node_modules/firebase-functions/lib/common/providers/https.js:458:26  
.
.
.
code: 404,
errors: [ 
     { 
    message: 'The document type is not supported.', 
    domain: 'androidpublisher', 
        reason: 'unsupportedDocType', 
        location: 'token', 
    locationType: 'parameter' 
} 
[Symbol(gaxios-gaxios-error)]: '6.5.0'"

该token是有效的，与Google订单管理系统中已成功扣款的订单所用token完全一致。

若尝试调用Purchases.subscription:get验证非续订订阅，会返回404错误Your request is invalid for this subscription purchase，这符合文档预期（预付费订阅应使用Purchases.products:get接口）。

可续订订阅（用Purchases.subscription:get）和一次性非消耗品（用Purchases.products:get）的验证均能正常工作，仅非续订订阅验证失败，已困扰一周仍未解决。

相关代码如下：

export class GooglePlayPurchaseHandler extends PurchaseHandler {
  private androidPublisher: AndroidPublisherApi.Androidpublisher;

  constructor(private dbCalls: dbCalls) {
    super();
    this.androidPublisher = new AndroidPublisherApi.Androidpublisher({
      auth: new GoogleAuth({
        credentials,
        scopes: ["https://www.googleapis.com/auth/androidpublisher"],
      }),
    });
  }

  async handleSubscription(
      userId: string, productData: ProductData, token: string, productID: string
  ) : Promise<boolean> {
    console.warn(
        "called Google handleSubscription"
    );
    console.warn(
        `ANDROID_PACKAGE_ID: ("${ANDROID_PACKAGE_ID}")`
    );
    console.warn(
        `productID: ("${productID}")`
    );
    console.warn(
        `token: ("${token}")`
    );
    try {
      const response = await this.androidPublisher.purchases.subscriptions.get({
        packageName: ANDROID_PACKAGE_ID,
        subscriptionId: productID,
        token,
      });

      if (!response.data.orderId) {
        console.error("Could not handle purchase without order id");
        return false;
      }

      console.log("mapped orderId handleSubscription");
      // Update order id if necessary
      let orderId = response.data.orderId;
      const orderIdMatch = /^(.+)?[.]{2}[0-9]+$/g.exec(orderId);
      if (orderIdMatch) {
        orderId = orderIdMatch[1];
      }

      console.log("called SubscriptionPurchase handleSubscription Google Play");
      const purchaseData: SubscriptionPurchase = {
        iapSource: "google_play",
        orderId: orderId,
        productId: productID,
        userId: userId,
        purchaseDate: new Date(parseInt(response.data.startTimeMillis ?? "0", 10)),
        type: "SUBSCRIPTION",
        expiryDate: new Date(parseInt(response.data.expiryTimeMillis ?? "0", 10)),
        status: [
          "PENDING",
          "ACTIVE",
          "ACTIVE",
          "PENDING",
          "EXPIRED",
        ][response.data.paymentState ?? 4] as SubscriptionStatus,
      };
      if (userId) {
        await this.dbCalls.insertPurchaseInfo(
            {...purchaseData, userId} as Purchase
        );
      } else {
        await this.dbCalls.updatePurchaseInfo(
          purchaseData as Purchase
        );
      }
      return true;
    } catch (e) {
      console.log("could not verify the purchase because of error", e);
      return false;
    }
  }
}

依赖配置：

"dependencies": {
    "firebase-admin": "^12.1.0",
    "firebase-functions": "^4.9.0",
    "google-auth-library": "^9.8.0",
    "googleapis": "^134.0.0",
    "node-apple-receipt-verify": "^1.13.0"
  },

内容的提问来源于stack exchange，提问作者mendesbr