Overview

The Marketplace is an online system for facilitating the communication between customers and eligible parties. After registration, the customers can connect and give access to energy data from their AIIDA instances, while the eligible parties can submit their energy services and create data requests. All the submitted information is stored in the Database. The Marketplace system also includes the EP Web App for eligible parties to search for energy data of customers, and the Customer Mobile App for customers to search for the energy services of their choice. The customer always has to provide permission before an eligible party can access their data. Specifically, when a customer provides permission for data access, the Marketplace forwards the data request to the customer's AIIDA instance which sends the requested energy data to the EDDIE Framework system of the eligible party (if the permission also exist in the AIIDA instance). Thus, the Marketplace enables customers and eligible parties to communicate with each other. As a result, customers can find and use energy services, and eligible parties can find and request the customer energy data they need. The following diagram shows the internal containers and interactions of the Marketplace system.

Diagram

Container	Description
Customer Mobile App	This is a cross-platform frontend application developed using Flutter to provide an interface for the customers. This application enables the customer to create an account and login, to register their AIIDA instance, and to browse data services and requests of eligible parties.
EP Web App	This is a frontend application developed using Vue.js to provide an interface for the eligible parties. This application enables the eligible party to create an account and login, to create a data request, to create a data service, and to browse AIIDA instances of customers (who have data that fits a data request).
Marketplace Application	This is a backend application developed using Spring Boot to implement the logic of the Marketplace system. This application receives requests from the Customer Mobile App and the EP Web App, and implements the logic required to create accounts for customers and eligible parties, to store customer and eligible party information, to enable the browsing of data requests and services, and to check AIIDA instances for the data they can offer.
Database	This is a PostgreSQL database that stores user accounts (e.g., of customers and eligible parties), customer information (e.g., about AIIDA instances), and eligible party information (e.g., about data requests and services).
IAM	This is a Keycloak application utilized to manage the authentication and access of customers and eligible parties. It uses the Database to store account information.