@sentinel-atl/core

DID identity, Verifiable Credentials, crypto primitives, and KeyProvider interface for the Agent Trust Layer.

Features

• DID generation — did:key method with Ed25519 (multicodec 0xed01, base58btc)
• Verifiable Credentials — W3C VC Data Model v2.0 with Ed25519Signature2020 proofs
• KeyProvider abstraction — pluggable key storage (in-memory, HSM, etc.)
• Crypto utilities — sign/verify, SHA-256 hashing, deterministic canonicalization
• Intent declarations — structured intent constraints for tool calls
• Agent Passport — portable agent identity bundle

Install

npm install @sentinel-atl/core

Quick Start

import { InMemoryKeyProvider, createIdentity, issueVC, verifyVC } from '@sentinel-atl/core';

const kp = new InMemoryKeyProvider();
const agent = await createIdentity(kp, 'my-agent');
console.log(agent.did); // did:key:z6Mk...

const vc = await issueVC(kp, {
  type: 'AgentAuthorizationCredential',
  issuerDid: agent.did,
  issuerKeyId: agent.keyId,
  subjectDid: 'did:key:z6Mk...',
  scope: ['files:read'],
  maxDelegationDepth: 1,
  expiresInMs: 3600_000,
});

const result = await verifyVC(vc);
console.log(result.valid); // true

API

| Export | Description | |---|---| | createIdentity(kp, label) | Generate a new DID + key pair | | issueVC(kp, options) | Issue a W3C Verifiable Credential | | verifyVC(vc) | Verify a VC's signature and expiration | | InMemoryKeyProvider | In-memory KeyProvider implementation | | createIntent(options) | Create an intent declaration | | verifyIntent(intent) | Verify intent signature and constraints | | createPassport(options) | Bundle identity + VCs into a portable passport | | verifyPassport(passport) | Verify passport integrity |

License

MIT