How to return data on execution of invoke function

Question

I have a chaincode in which i have a invoke function. Now i want to return certain data like Transaction id, time stamp etc. How can i implement this?

Answer 1

You can do this using a response object. You can create a response object, store whatever information you need

(Transaction id, time stamp), marshal it into json and then you can return it.

Ex:

type ChaincodeResponse struct {

      txID string

      time *timestamp.Timestamp

  }

// whatever code you have goes here

resp, err := json.Marshal(ChaincodeResponse{

      txID: stub.GetTxID(),

      time: stub.GetTxTimestamp(),

})

//the below code is used to return

return shim.Success(resp)