I'm invoking the method sendToDevice of Firebase Cloud Messaging (FCM) in Cloud Function (Node Js).

I pass the token parameters with multiple tokens such as [token1, token2, ... ]

Then I received a response of type MessagingDevicesResponse.

The code is like this:

//Array of Strings. token1-3 are strings
const tokens = [token1, token2, token3]; 

await admin
       .messaging()
       .sendToDevice(tokens, payload)
       .then((response) => { // response is type MessagingDevicesResponse

         for (let i = 0; i < response.results.length; i++) {
           const res = response.results[i];
                
           if(res.error) {
              //* If error found on index i
              //*** Do something to delete the non-registered token

           }
         }
         return { success: true };
       })
       .catch((error) => {
         console.error(
           `Error while sending notification. Code: ${error.code}, Error: ${error}`);
         return { error: error };
       });

Now, as you can see that tokens variable is an array of strings. Consequently, response.results also return the same length as tokens. But the question is, does the indexes in response.results maps to the same index as tokens?

I mean, does response.results[0] means it is the result for sending notification to the device with the token in tokens[0], and so on?

Thank you