带有 proto loader 问题的 GRPC 连接设置

如何解决带有 proto loader 问题的 GRPC 连接设置

我是 grpc 的新手，我正在使用 dynamo db，下面是我的代码。我在使用 dynamodb 获取 grpc 调用时遇到问题，为了从数据库中获取结果，这将显示来自 db 的空响应，但是当我从邮递员应用相同的 api 时，这将正常工作，我已附上下面的两个响应>

file name grpc.ts ==>

    server.addService(walletProto.WalletService.service,{
      GetWalletById: async (
        call: ServerUnaryCall<any>,callback: sendUnaryData<any>
      ) => {
        console.log('grpc request ===>',call.request);
        const userId = call.request.userId;
        let walletInfo = await walletService.getWallet({ userId });
        console.log('grpc response ===>',walletInfo);
        if (!walletInfo.error) {
          const { walletBalance,balanceOnHold,currency } = walletInfo.data;
          walletInfo.data = { walletBalance,currency };
          callback(null,walletInfo);
        } else {
          callback(null,walletInfo);
        }
      }
    });
    
    wallet service file===>
      getWallet = async ({
        userId,}: Interfaces.GetWalletType): Promise<Interfaces.PromiseResponse> => {
        try {
          console.log('service request ===>',userId);
          if (!userId) throw { message: 'User Id required' };
          let UserWallet;
    
          // Finding user wallet from database
          const walletData = await walletModel
            .scan('userId')
            .contains(userId)
            .exec();
    console.log('wallet data DB===>',walletData);
          // Checking user wallet on database
    
    
          // Sending success response in all validation success
          return {
            error: false,message: MESSAGES.GET_BALANCE.success,status: RESPONSES.SUCCESS,data: walletData,};
        } catch (error) {
          // Sending error response if any validation Failed
          return {
            error: true,status: error.status ? error.status : RESPONSES.BADREQUEST,message: error.message,};
        }
      };


When I run this same apis with postman,this will show me the result from database with particular userId,but no result found when I call this apis from grpc. I attached both the response from postman and grpc. 

response from postman===>

{
  "error": false,"message": "Success","data": {
    "currency": "INR","updatedAt": "2021-07-26T18:49:46.712Z","userId": "d192a5a8-df73-496e-845d-8e97071093b5","walletBalance": 138308,"createdAt": "2021-07-26T08:11:00.378Z","balanceOnHold": 0,"id": "5b2baf8f-67aa-4426-9d59-5ad057ac2a0b"
  }
}

grpc response ===> 
  {
error: false,message: 'Success',status: 200,data: Document {
  createdAt: 2021-07-26T15:07:49.537Z,balanceOnHold: 0,walletBalance: 0,currency: 'INR',id: 'c2daf3cc-3d0f-49ab-84b9-7fbbd914b30f',userId: 'd192a5a8-df73-496e-845d-8e97071093b5',updatedAt: 2021-07-26T15:07:49.537Z
}

}