how to use Koa-multer and Koa-router as service object in feathersjs?

[SYBIOTE]

migrating an app from feathersjs/express to feathersjs/koa
feathersjs/express uses Multer and you can use it in feathers with this syntax

app.use("path",multipartmiddleware.any(),middleware1,middleware2) // middleware 2 can be a service definition

by service definition I mean this

{ create: function1() // and so on for other functions }

following this I can use

const service = app.service("path")
and ill have the service well defined

but in feathersjs/koa , you need to use koa-multer right? and you need Koa-router to use it
Edit: looks like I can use body parser for this, but that's yet to be updated
eg
router.post("path",multipartmiddleware.any(),middleware1,middleware2) // middleware are async functions here

the second middleware function can directly call function1() so service definition is not needed

I do register the routes following this
app.use(router.routes())

since I need to use koa-router for koa-multer, how do I register the router as a service? or is there another way to do it

the main thing is that I need to upload a .glb with a feathersjs/koa application

I saw this discussion
https://github.com/feathersjs/feathers/discussions/3097

I hope more can be elaborated on this

[SYBIOTE]

i cant seem to find a way to use koa-router , but you can use before: service middle wate with koa multer instead
example snippet

import Multer from 'koa-multer'
const multipartMiddleware = Multer({ limits: { fieldSize: Infinity, files: 1 } })
// other code
app.use(
 'upload',
 {
  create: upload(app)
 },
 {
 koa: {
 before: [
    multipartMiddleware.any(),
    async (ctx, next) => {
    console.log('trying to upload file')
    // handle as needed
    await next()
    console.log('uploaded file')
    return ctx.body
  }
  ]
  }
}

[vicentecastroa]

Thanks!