Registries

Revocation means deleting or updating a credential. Truvera's credential revocation is managed with a revocation registry.

There can be multiple registries on the chain, and each registry has a unique id. It is recommended that the revocation authority create a new registry for each credential type. Truvera Workspace allows you to create, delete, and revoke/unrevoke the credential. You can retrieve a specified registry as well as a list of all registries created by the user.

For a detailed example of the registry workflow. Please refer here.

If you want to revoke ZKP credentials, you must create a registry with type `DockVBAccumulator2022`. For revoking other credentials, you can use `StatusList2021Entry`.

Create Registry

To create a registry, you have to create a policy object for which a DID is needed. It is advised that the DID is registered on the chain first. Otherwise, someone can look at the registry and register the DID, thus gaining control of the registry.

Choosing the right revocation registry is essential. Here's a simplified overview of the available options:

• StatusList2021Entry

  • Only supports non-ZKP credentials.

  • Recommended for most users.

  • Collective Tracking: Manages all revocation entries together, making it less costly to revoke multiple credentials simultaneously.

  • W3C Compliant.

• DockVBAccumulator2022

  • Only supports ZKP credentials.

  • Utilizes an on-ledger accumulator for enhanced privacy.

  • Offers more privacy than the W3C Status List 2021.

CredentialStatusList2017 (Deprecated)

• Only supports non-ZKP credentials.

• Individual Tracking: Each entry is tracked separately, which means more ledger space is used for multiple entries.

• This registry is cost-effective for a single entry. However, managing several entries can be more expensive.

• Implements add-only policies.

Parameters

Name	In	Type	Required	Description
addOnly	body	boolean	false	True/false options. The default value is "false".
policy	body	[DIDDock]	true	The DIDs which control this registry. You must own a DID listed here to use the registry. Only one policy supported as of now: OneOf DID in list.
type	body	string	false	Specifies which type of registry to create. Defaults to StatusList2021Entry.

Create Registry

Create a Revocation registry on the blockchain. More info about Registry Creation

POSThttps://api-testnet.truvera.io/registries

Body

application/json

Specify action and credential ids

addOnlyboolean

policyarray of DID (string)

Only one policy supported as of now called OneOf

typeenum

CredentialStatusList2017StatusList2021EntryDockVBAccumulator2022

Response

200400402404

Registry will be created.

Body

application/json

idstring

dataobject

Request

JavaScriptCurlPython

const response = await fetch('https://api-testnet.truvera.io/registries', {
    method: 'POST',
    headers: {
      "Content-Type": "application/json"
    },
    body: JSON.stringify({
      "addOnly": true,
      "policy": [
        "did:dock:Y5DZQEuGNXAN3tHdaxmEWkPVs43yyumjaD6gRKoyTHHvsZxdS"
      ],
      "type": "StatusList2021Entry"
    }),
});
const data = await response.json();

Response

200400402404

{
  "id": "text"
}

List Registries

Return a list of all registries created by the user. The list is returned with the registry id and policy of the revocation registry.

For now, only one policy is supported, and each registry is owned by a single DID.

Parameters

Name	In	Type	Required	Description
offset	query	integer	false	How many items to offset by for pagination
limit	query	integer	false	How many items to return at one time (max 64)

List Registries

Get all registries created by user. More info about List Registries

GEThttps://api-testnet.truvera.io/registries

Query parameters

Response

200400

All registries by user

Body

application/json

idHex32 (string)

32 byte hex string. Ignoring higher base (base64) for simplicity.

registryRegistry (object)

Revocation registry

Request

JavaScriptCurlPython

const response = await fetch('https://api-testnet.truvera.io/registries', {
    method: 'GET',
    headers: {},
});
const data = await response.json();

Response

200400

[
  {
    "id": "text",
    "registry": {
      "addOnly": false,
      "policy": [
        "did:dock:xyz"
      ],
      "type": "CredentialStatusList2017"
    }
  }
]

Get Registry

Get the details of an existing registry, such as policy, add-only status, when it was last updated, and controller(s). You need only supply the revocation registry id that was returned upon revocation registry creation.

Parameters

Name	In	Type	Required	Description
id	path	Hex32	true	Revocation registry id.

Get Registry

Get the details of an existing registry, such as policy, add-only status, when it was last updated, and controller(s). More info about Get Registry

GEThttps://api-testnet.truvera.io/registries/{id}

Path parameters

id*Hex32 (string)

32 byte hex string. Ignoring higher base (base64) for simplicity.

Response

200400404

Returns the information about provided registry ID.

Body

application/json

addOnlyboolean

policyarray of DID (string)

Only one policy supported as of now called OneOf

typeenum

CredentialStatusList2017StatusList2021EntryDockVBAccumulator2022

Request

JavaScriptCurlPython

const response = await fetch('https://api-testnet.truvera.io/registries/{id}', {
    method: 'GET',
    headers: {},
});
const data = await response.json();

Response

200400404

{
  "addOnly": false,
  "policy": [
    "did:dock:xyz"
  ],
  "type": "CredentialStatusList2017"
}

Revoke/Unrevoke Credential

Credential revocation is managed with on-chain revocation registries. To revoke a credential, its id (or hash of its id) must be added to the credential. It is advised to have one revocation registry per credential type. Revoking an already revoked credential has no effect.

Similar to the replay protection mechanism for DIDs, the last modified block number is kept for each registry, which is updated each time a credential is revoked or unrevoked. Unrevoking an unrevoked credential has no effect.

In this API, simply add Revoke/Unrevoke into the action parameter and input the desired credential ids.

Parameters

Name	In	Type	Required	Description
id	path	Hex32	true	Revocation registry id.
action	body	string	false	The action taken, either revoke or unrevoke. The default value is "revoke"
credentialIds	body	array	true	The list of credential ids to act upon.

Enumerated Values

Parameter	Value	Description
action	revoke or unrevoke	Action to take on the registry.

Revoke/Unrevoke Credential

Credential revocation is managed with on-chain revocation registries. To revoke a credential, its id (or hash of its id) must be added to the credential. More info about Revoke/Unrevoke Credentials

POSThttps://api-testnet.truvera.io/registries/{id}

Path parameters

id*Hex32 (string)

32 byte hex string. Ignoring higher base (base64) for simplicity.

Body

application/json

Specify action and credential ids

actionenum

revokeunrevoke

credentialIdsarray of string (uri)

Response

200400401402404

Will try to revoke/unrevoke the credential.

Body

application/json

idstring

dataobject

Request

JavaScriptCurlPython

const response = await fetch('https://api-testnet.truvera.io/registries/{id}', {
    method: 'POST',
    headers: {
      "Content-Type": "application/json"
    },
    body: JSON.stringify({
      "action": "revoke",
      "credentialIds": [
        "https://credentials.truvera.io/3e343b80ebaefb40d8f9d99ec27a885e"
      ]
    }),
});
const data = await response.json();

Response

200400401402404

{
  "id": "text"
}

Delete Registry

A registry can be deleted, leading to all the corresponding revocation ids being deleted as well. This requires the signature from the owner, similar to the other updates.

Parameters

Name	In	Type	Required	Description
id	path	Hex32	true	Revocation registry id.

Delete Registry

A registry can be deleted, leading to all the corresponding revocation ids being deleted as well. More info about Registry Deletion

DELETEhttps://api-testnet.truvera.io/registries/{id}

Path parameters

id*Hex32 (string)

32 byte hex string. Ignoring higher base (base64) for simplicity.

Response

200400404

Revocation Registry will be deleted

Body

application/json

idstring

dataobject

Request

JavaScriptCurlPython

const response = await fetch('https://api-testnet.truvera.io/registries/{id}', {
    method: 'DELETE',
    headers: {},
});
const data = await response.json();

Response

200400404

{
  "id": "text"
}