SendResponse.error.code is undefined

[rejhgadellaa]

[REQUIRED] Environment

• Operating System version: macOS 15.7.2 (24G325)
• Firebase SDK version: 13.6.0
• Firebase Product: messaging
• Node.js version: 22.18.0
• NPM version: 10.9.3

[REQUIRED] The problem

Steps to reproduce:

• Send push messages with sendEachForMulticast()
• Inspect the return value (SendResponse[])
• If a SendResponse has an error, the SendResponse.error.code is undefined

Relevant Code:

const result = await sendEachForMulticast(/* ... */)

result.failureCount && result?.responses ?? [] ).forEach( 
  response => console.log( response.error.code, response.error ) 
);

[jonathanedey]

Hey @rejhgadellaa, is there a specific error or scenario you are seeing this behavior with?

[rejhgadellaa]

I'm trying to catch errors where the token is no longer valid and remove the token from my database so I don't keep trying to send push messages to that device.

I was checking for the following error.code values:

'messaging/invalid-registration-token',
'messaging/registration-token-not-registered',
'messaging/unregistered',

but since error.code is undefined, my code no longer catches these errors.

I added an additional check for now, which checks error.message, but this feels a) very brittle and b) I've only encountered one type of error thus far ('Requested entity was not found.'), and I don't know what the value of message is for the other errors.