# Technical Components (WIP)

<div data-full-width="true"><figure><img src="/files/JZyRLPldcsEv5tnPNOtz" alt=""><figcaption><p>High level diagram of ULP depicting the interplay between the ecosystem players</p></figcaption></figure></div>

<div data-full-width="true"><figure><img src="/files/cphKyHecPvnRT0SQ35v1" alt=""><figcaption><p>Detailed view of ULP components</p></figcaption></figure></div>

Technical

The components can be divided into two parts - **Microservices / APIs and Frontend Portals**

### **A. ULP Microservices**

#### **1. Credential Issuance Service**

Microservice to create the credentials in the credential store. This service is part of Sunbird RC

<https://github.com/Sunbird-RC/sunbird-rc-core/pull/217>

#### **2. Credential Schema Service**

Microservice to create the credential schema, template and render the credentials in the selected template.

<https://github.com/Sunbird-RC/sunbird-rc-core/pull/219>

#### **3. Identity Service (DID)**

Microservice to create the unique identity for the learner and issuer for the credential.

<https://github.com/Sunbird-RC/sunbird-rc-core/pull/218>

#### **4. Middleware Service**

The Backend for frontend (BFF) microservice is written for adding authorization for the above services and ULP specific services like Aadhar Verification (pre-prod) and UDISE APIs

{% embed url="<https://github.com/Sunbird-RC/ulp-bff>" %}

### **B. Frontend Portal links**

#### 1. Issuance portal

This is the portal to enable the organisation, issuer onboarding. It has the functionality to create bulk credentials, claim approval, view issued credentials and a dashboard. You can add setup this on your server by adding config changes.

*The portal is currently under maintenance and might not be usable.*

{% embed url="<https://github.com/Sunbird-RC/ulp-registration-portal>" %}

#### 2. Holder App

This web app will be for learners to view, download or share their credentials.

{% embed url="<https://github.com/Sunbird-RC/ulp-ewallet>" %}

#### 3. Verification Portal

This web app will be used for verifiers to verify whether the particular credential is valid and not expired.

{% embed url="<https://github.com/Sunbird-RC/ulp-vc-verification>" %}


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