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# TrustAlliance DID Key SDK

Implementation of JSON Web Key 2020 <https://w3c-ccg.github.io/lds-jws2020/>

Based on <https://github.com/w3c-ccg/lds-jws2020>

## IMPORTANT!

* This is a minimum viable product suite with limited functionality.
* Please do not use this for production
* This is a part of SDKs for Verifiable Credentials, Verifiable Credential Presentations, DID Keys, Self Sovereign Identity and Decentralised Identifiers

## Installation

```bash
yarn install
```


## Trackback Key
![Architecture](Architecture.png)
## Usage

### importing DID builder and resolver

ES Modules import

```javascript

import { JsonWebKey2020 } from '@trustalliance/key'

```

CommonJS import

```javascript

const { JsonWebKey2020 } = require('@trustalliance/key');

```

## Example

### Generate keypair

```javascript

const keyPair = await JsonWebKey2020.generate();

// {
//   id: 'did:trustalliance:key:...-pXbFqo#...-pXbFqo',
//   type: 'JsonWebKey2020',
//   controller: 'did:trustalliance:key:...-pXbFqo',
//   publicKeyJwk: {
//     crv: 'Ed25519',
//     x: 'THLsqR-...-3FDg',
//     kty: 'OKP',
//     alg: 'EdDSA',
//   },
//   privateKeyJwk: {
//     crv: 'Ed25519',
//     d: '..-URkyPqyYhTc',
//     x: 'THLsqR-...-3FDg',
//     kty: 'OKP',
//     alg: 'EdDSA',
//   },
// }



```

### Sign messages

```javascript

const signer = keyPair.signer();
const signature = await signer.sign({message:"test"});

```

### Verify signature

```javascript

const message = {...}

const signer = keyPair.signer();
const signature = await signer.sign(message);

const verifier = keyPair.verifier();
const verified = await verifier.verify({ data: message, signature });

// true / false
```