Documentation: authorisation wrapper

The AuthorisationWrapper class can be used for requesting an access token to the following authorisation servers:
- EBSI Authorisation API: https://hub.ebsi.eu/apis/pilot/authorisation/v4.
This is used by the TimestampWrapper and TrackAndTraceWrapper for requesting an access token to EBSI, required value to consume EBSI Timestamp and Track and Trace apis.

- Trace4eu authorization server: https://api-dev-auth.trace4eu.eu/oauth2/token.
This server is part of the authorization-and-authentication server of Trace4eu (https://github.com/trace4eu/authorization-and-authentication).
The client needs to execute a Oauth client credentials flow by sending a jwt assertion
It's used by the vc-component too when issuing EBSI verifiable credentials and when the authorization server issue and verify JWTs for managing the credential issuance process within the OIDC4VCI flow.

It depends on the SignatureWrapper for making the signatures. In order to instantiate the EbsiAuthorisationApi or the Trace4euAuthorisationApi, the wallet is required.

Constructor

$3

Creates a new instance of the Wallet class.

- Parameters:
- isEnterprise: boolean: flag to indicate if keys will be imported locally otherwise it will link to an Enterprise Wallet.
- did: string: it represents the did of the entity.
- entityKeys: KeyPairData[]: array of keys in hex format. You need to specify the algorithm of each key.

- Example:
``typescript
const did = 'did:ebsi:zobuuYAHkAbRFCcqdcJfTgR';
const entityKeys = [
{
alg: Algorithm.ES256K,
privateKeyHex:
'',
kid: ''
},
{
alg: Algorithm.ES256,
privateKeyHex:
'',,
kid: ''
},
];
const wallet = WalletFactory.createInstance(false, did, entityKeys);

$3

Creates a new instance of the EbsiAuthorisationApi class.

- Parameters:
- wallet: Wallet: wallet will be used for


- Example:
`typescript
const ebsiAuthorisationApi = new EbsiAuthorisationApi(wallet);

$3

Creates a new instance of the Trace4euAuthorisationApi class.

- Parameters:
- wallet: Wallet: wallet will be used for


- Example:
`typescript
const trace4euAuthorisationApi = new Trace4euAuthorisationApi(wallet);

Methods

$3

Request an access token to the corresponding authorization server.

- Parameters:
- alg: string: algorithm to be used.
- scope: string: scope to be requested
- credentials: string | string[]: ebsi authz server is an OIDC4VP server and vp_token needs to be presented with the required VCs according to the presentation definition

- Returns:
- Promise: access token

- Example:
``typescript
const ebsiAccessToken = await ebsiAuthorisationApi.getAccessToken(
'ES256',
'tnt_create',
[],
);

const trace4euAccessToken = await trace4euAuthorisationApi.getAccessToken(
'ES256',
'ocs:read',
);