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Shopping model: merchant-independent logic controlling flow of business model

Example shopping models:

Order, Pay, (Deliver 52 times)

(1 month; Order, Deliver) Pay

Bill

Start Transfer $

Order

Complete

Payment

Complete

Event Handlers

4

Event Handlers

Proxy event handlers

translate from

native applications

to shopping model

defined protocols

Abstract API

allows application to

interact with many

different services

in a consistent way

Payment/Delivery/

Other Services

Customer

Merchant

Event Handlers

State

Information

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