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The Flows

We recommend following the below flows for consumer and producer devices. You can find a breakdown in each of the steps below.

The devices are not synchronised by the SDK, so you'll need to ensure that the SDKs call the Worldpay Within API in the correct order. If you follow the steps below, then the outcome should be as expected.

The flows diagram

The flows of the producer and consumer.

The Consumer flow

This is the flow of the consumer, please note that these flow steps map to the interface either in Go or in the Wrapper - e.g. in Java this is fully documented in the javadoc.

Step in Flow	What it does
1. SETUP	Setups up the device
2. DEVICE DISCOVERY	Discover devices that are broadcasting messages
3. (CHOOSE MESSAGE)	Choose the message, then use that information in the following steps
4. INIT CONSUMER	Initialises the device as a consumer
5. REQUEST SERVICES	Request service messages from the device that is broadcasting, which lists what services it's offering
6. GET SERVICE PRICES	Get's the prices for the service you are interested in
7. SELECT SERVICE	Selects the service the device wants to consume
8. MAKE PAYMENT	Makes a payment for the service that is chosen
9. BEGIN SERVICE DELIVERY	Starts the process / flow to consume the service based on the service token received.
10. STOP SERVICE DELIVERY	Called to tell the other thing that it has completed it's consumption of the service

The Producer flow

This is the flow of the producer, please note that these flow steps map to the interface either in Go or in the Wrapper - e.g. in Java this is fully documented in the javadoc.

Step in Flow	What it does
1. SETUP	Setups the device
2A. ADD SERVICE	Adds a service to the producer
2B. REMOVE SERVICE	Remvoves a service from the producer
3. INIT PRODUCER	Initialises the producer
4A. START BROADCAST	Starts the producer broadcasting it's service message
4B. STOP BROADCAST	Stops the producer from broadcasting it's service message