I develop in Koa and I use Firebase to messaging, because of a real-time database. When I want to get messages from firebase I get Not found, but in console.log() it shows me.
This is my function to getConversation(Messages)
async getConversation(conversationName, callback) {
    var ref = await admin.database().ref(`messages/${conversationName}`)
    await ref.on('value', (snapshot, prevChildKey) => {
        var newPost = snapshot.val()
        let values = Object.values(newPost)
        callback(values)
    })
}
Then I call it in another controller like this
async getMessages(ctx) {
    const id = ctx.params.id
    const nameOfConversation = await ctx.db.Conversation.findById(id)
    await firebaseIndex.fbController.getConversation(nameOfConversation.name, response => {
        console.log(response)
        ctx.body = response //TODO
    })
}
At the last, I call it in routes.
router.get('/getConversation/:id', middlewares.isAuthenticate, controllers.userConversation.getMessages)
I always get body Not found. Do anybody know how I can solve it?
 
                        
I solved it.
ctx.bodyhas to have a Promise.