Regarding setting up the states in pact provider test

[210178]

Hi,
I am trying to implement the pact provider test in Koa JS. My scenario is like this,

Scenario-1:

GIVEN I have a student id
WHEN I request to retrieve the student details by id
AND id is available in DB
THEN I should get a success response with student mark summary

Scenario-2:

GIVEN I have a student id
WHEN I request to retrieve the student details by id
AND id is not available in DB
THEN I should get a failure response

My rest endpoint is,
GET
http://localhost:8080/students/{id}/mark/summary

My provider configuration:

const opts = {
provider: 'Receive',
providerBaseUrl: 'http://localhost:8080',
providerStatesUrl: 'http://localhost:8080/states',
providerStatesSetupUrl: 'http://localhost:8080/setup',
pactUrls: [ path.resolve(process.cwd(), './app/pacts/receive-summary.json') ],
tags: [ 'prod', 'test' ],
publishVerificationResult: false,
providerVersion: '0.0.50'
}

and I have the following code for setting my states and setup end points,

const app = require('../index')
const path = require('path')
const Verifier = require('pact').Verifier
const impress = require('impress-router')
const router = new impress()

router.get('/states', setStates)
async function setStates(ctx, next) {
console.log('Entering into setStates() !!!!!!')
const response = {
'My Consumer': [ 'I have a valid delivery number', 'I have an invalid delivery number' ]
}
ctx.body = JSON.stringify(response)
next()
}

router.post('/setup', setup)

async function setup(ctx, next) {
console.log('Entering into setup() !!!!!!')
let deliveryNumber
const state = ctx.request.body
console.log('state value:', state)

switch (state) {
    case 'I have a delivery number':

        deliveryNumber = 'us12345'
        break
    case 'I have an invalid delivery number':
        deliveryNumber = '12345'
        break
    default:
       console.log('here in DEFAULT')
}

ctx.body = 200
next()

}

app.use(router)
app.listen(8080)

For this scenario, how can I setup my states() and setup()??? With the above code, it never hits the setStaes() and I am not sure how and when those endpoints will be triggered.

Please clarify.