@beclab/vc-engine

vc-engine is a minimal SDK for VC (Verifiable Credential) workflows.

It embeds ssi-service inside a Node.js application, so developers do not need to deploy a separate SSI service to:

• register VC schemas
• apply for VCs
• issue VCs
• create VPs
• verify VPs

Background

VC / DID are basic building blocks for decentralized identity:

• W3C DID Core: defines what a DID is
• W3C Verifiable Credentials: defines the VC / VP data model
• DIF: provides interaction specifications such as Credential Manifest and Presentation Exchange

In short:

• DID is an identity identifier
• VC is a trusted claim issued to a holder
• VP is a package of one or more VCs presented to a verifier

Roles and Scenarios

Issuer

Defines credential types and issues VCs to users.

Examples: a school issues a degree credential, a company issues an employee credential, Olares issues a domain ownership credential.

Holder

Applies for, stores, and presents VCs.

Example: a user receives a domain VC and later creates a VP to prove domain ownership.

Verifier

Defines verification requirements and checks whether the VP submitted by a Holder is trustworthy.

Example: an application asks the user to prove ownership of an Olares ID or domain.

Installation

npm install @beclab/vc-engine

The install script downloads the ssi-service binary automatically.

Minimal Example

import { VcEngine } from '@beclab/vc-engine';

const engine = await VcEngine.create();

const schemas = await engine.core.registry.listSchemas();
console.log(schemas);

await engine.stop();

For more SDK usage, see docs/sdk-api.md.