Function isDwnDidService

Checks if a given object is a DwnDidService.

A DwnDidService is defined as DidService object with a type of "DecentralizedWebNode" and enc and sig properties, where both properties are either strings or arrays of strings.

Example

const didDocument: DidDocument = {
  id: 'did:example:123',
  verificationMethod: [
    {
      id: 'did:example:123#key-1',
      type: 'JsonWebKey2020',
      controller: 'did:example:123',
      publicKeyJwk: { ... }
    },
    {
      id: 'did:example:123#key-2',
      type: 'JsonWebKey2020',
      controller: 'did:example:123',
      publicKeyJwk: { ... }
    }
  ],
  service: [
    {
      id: 'did:example:123#dwn',
      type: 'DecentralizedWebNode',
      serviceEndpoint: 'https://dwn.tbddev.org/dwn0',
      enc: 'did:example:123#key-1',
      sig: 'did:example:123#key-2'
    }
  ]
};

if (isDwnService(didDocument.service[0])) {
  console.log('The object is a DwnDidService');
} else {
  console.log('The object is not a DwnDidService');
}
Copy

See

Decentralized Web Node (DWN) Specification