curl -X PUT -H 'Content-Type: application/json' \
    -H 'Authorization: ApiKey-v1 953f4d85715c479a30b9ac0592495b576ee90dfc7671a53a7ed440225cb48676' \
    -d '{
    "coupon": "SampleCoupon",
    "state": "open"
}' 'https://developerdocs.talon.one/v1/customer_sessions/TEST-SESSION-ID-Coupon' 

var TalonOne = require('talon-one')
var applicationKey = '953f4d85715c479a30b9ac0592495b576ee90dfc7671a53a7ed440225cb48676'

var client = new TalonOne.IntegrationClient('https://developerdocs.talon.one', applicationKey)
var sessionId = 'TEST-SESSION-ID-Coupon'
client.updateCustomerSession({
  "coupon": "SampleCoupon",
  "state": "open"
}, function (err, integrationState) {
  console.log(integrationState.profile)
  console.log(integrationState.session)
  console.log(integrationState.event)
}); 

import one.talon.api.*;
import one.talon.api.model.IntegrationState;
import one.talon.api.model.NewCustomerSession;

private static void updateSession(IntegrationApi api, NewCustomerSession session, final String sessionName) {
    try {
        IntegrationState response = api.updateCustomerSession(sessionName, session);
        System.out.println(response.toString());
    } catch (ApiException e) {
        System.out.println(e.getResponseBody());
        e.printStackTrace();
    }
}

public static void main(String[] args) {
    IntegrationApi integrationApi = new IntegrationApi();
    IntegrationApiClient integrationClient = integrationApi.getApiClient();
    integrationClient.setApplicationId("1");
    integrationClient.setApplicationKey("953f4d85715c479a30b9ac0592495b576ee90dfc7671a53a7ed440225cb48676");
    integrationClient.setBasePath("http://developerdocs.talon.one");
          
    NewCustomerSession session = new NewCustomerSession();
    session.setCoupon("SampleCoupon");
    updateSession(integrationApi, session, "TEST-SESSION-ID-Coupon");
} 

$t = new TalonOne();
$t->subdomain = "developerdocs";
$t->applicationKey = "953f4d85715c479a30b9ac0592495b576ee90dfc7671a53a7ed440225cb48676";

$acceptCoupon = function($response, $args) {
    $coupon = $args[0];
    echo "acceptCoupon $coupon: ".print_r($response,true);
};

$rejectCoupon = function($response, $args) {
    $coupon = $args[0];
    echo "rejectCoupon $coupon: ".print_r($response,true);
};

$setDiscount = function($response, $args) {
    // This is a good spot to update discount lines in the current cart
    $label = $args[0];
    $value = $args[1];
    echo "setDiscount: $label $value ".print_r($response,true);
};

$response = $t->put("customer_sessions/TEST-SESSION-ID-Coupon", array(
    'coupon'     => 'SampleCoupon',
    'state'      => 'open'
));

if (!$response) {
    echo "Session update failed. Response: $response";
} else {
    // Register all effects you want to handle
    $t->processEffects($response, array(
        'acceptCoupon' => $acceptCoupon,
        'rejectCoupon' => $rejectCoupon,
        'setDiscount'  => $setDiscount)
    );
} 

# Fill in the details of your Talon.One Application here

application_key = '953f4d85715c479a30b9ac0592495b576ee90dfc7671a53a7ed440225cb48676'

talon = integration.Client('https://developerdocs.talon.one',  application_key)

# When the customer adds an item to their cart

result = talon.update_customer_session("my_unique_session_id", {
    "state": "open",
    "coupon": "SampleCoupon"
})