did-veres-one

Veres One DIDs

This library provides support classes for creating and processing Decentralized Identifiers for Veres One. This library enables a developer to:

• Create a Veres One DID
• Generate Veres One cryptographic proofs

npm install did-veres-one

const v1 = require('did-veres-one');

// See Configuration below for list of options
const options = {mode: 'dev', httpsAgent, hostname: 'localhost:12345'};
const veresDriver = v1.driver(options);

Configuration

• options - a set of options used when generating the DID Document
  • didType - the type of DID to generate. Options: 'nym' (default) or 'uuid'
  • invokeKey - optionally pass in a Capability Invocation key, otherwise it will be generated.
  • keyType - the type of keys to generate. Options: 'Ed25519VerificationKey2018' (default)
  • hostname - ledger node hostname override
  • passphrase - the passphrase to use to encrypt the private keys for nym-based DIDs. Set to null if the private keys should not be encrypted.
  • mode - the mode/environment to generate the DID in. Options: 'dev' (default), 'test', 'live'

If you do not specify a particular ledger hostname, one will be automatically selected based on the mode parameter (either 'test', 'dev' or 'live').

If you want to connect to a specific hostname (for testing a particular node, for example), you can specify the override directly:

API Documentation

The API documentation provided below is for the Promises-based API. The callback API works the same way where the callback provides the value for the resolved Promise.

Generate a DID Document

Generating a Veres One DID Document

// Generate a new DID Document
const didDocument = await veresDriver.generate(
  {didType: 'nym', keyType: 'Ed25519VerificationKey2018'}); // default

// Log the new didDocument to the console.
console.log('Generated:', JSON.stringify(didDocument, null, 2));

Registering a (newly generated) DID Document

To register a DID Document:

const registrationResult = await veresDriver.register({didDocument});

// Log the result of registering the didDoc to the VeresOne Test ledger
console.log('Registered!', JSON.stringify(registrationResult, null, 2));

Retrieving a Veres One DID Document

const did = 'did:v1:test:nym:ApvL3PKAzQvFnRVqyZKhSYD2i8XcsLG1Dy4FrSdEKAdR';
const didDoc = await veresDriver.get({did});
console.log(JSON.stringify(didDoc, null, 2));

Attach an OCAP-LD delegation proof to a capability DID Document

Attach a Linked Data Object Capability Delegation proof to a DID Document that is also a Linked Data Capability (Veres One DID Documents implicitly are). A capability only requires a delegation proof if its invocationTarget is not self-referencing. The delegation proof must be signed by a key referenced via the invocationTarget's capabilityDelegation relation.

• options - a set of options used when attaching the ocap-ld delegation proof
  • operation - the operation to attach the delegation proof to.
  • creator - the ID of the public key proving delegation authorization.
  • privateKeyPem - the private key material used to sign the proof.

Returns an operation object with an attached ocap-ld delegation proof.

Wrap a DID Document in a Web Ledger Operation for submission to Veres One

Wrap a DID Document in a Web Ledger Operation. Once it is wrapped, it can have Linked Data Capability invocation proofs attached to it and it can then be submitted to Veres One to be stored on the ledger.

• options - a set of options used when wrapping the DID Document
  • didDocument - the DID Document to wrap.
  • operationType - the type of operation to wrap with. Options: 'create' will cause the operation type of CreateWebLedgerRecord to be used (default: 'create').

Returns an operation object ready to have proofs attached to it prior to submission to a Veres One Accelerator or the Veres One ledger.

Attach an OCAP-LD invocation proof to an operation

Attach a Linked Data Object Capability Invocation proof to an operation. Once the operation is submitted to Veres One, the ledger nodes will be able to use the invocation proof to authorize the operation.

• options - a set of options used when attaching the ocap-ld invocation proof
  • operation - the operation to attach the invocation proof to.
  • capability - the ID of the capability that is being invoked (e.g. the ID of the record in the operation for self-invoked capabilities).
  • capabilityAction - the capability action being invoked.
  • creator - the ID of the public key proving invocation authorization.
  • privateKeyPem - the private key material used to sign the proof.

Returns an operation object with an attached ocap-ld invocation proof, ready to be submitted to the Veres One ledger.

Changelog

7.1.0 - 2019-10-08

Changed

• Update to dependencies with support for Node 12 native Ed25519 crypto.