用於核發憑證的 Digital Credentials API

// Check if the browser supports Digital Credentials issuance and the protocol.
if (window.DigitalCredential && DigitalCredential.userAgentAllowsProtocol('openid4vci-v1')) {

  // Construct a credential offer according to the OpenID4VCI specification.
  // Note: The API is in an active development stage. Always consult the
  // specification and documentation for the most recent implementation details
  const credentialOffer = {
    credential_issuer: 'https://digital-credentials.dev',
    credential_configuration_ids: [
      'org.iso.18013.5.1.mDL'
    ],
    authorization_server_metadata: {
      issuer: 'https://digital-credentials.dev',
      token_endpoint: 'https://digital-credentials.dev/openid4vci/token',
      authorization_endpoint: 'https://digital-credentials.dev/openid4vci/auth',
      grant_types_supported: [
        'authorization_code',
        'urn:ietf:params:oauth:grant-type:pre-authorized_code'
      ],
      response_types_supported: ['code','token']
    },
    // Metadata details to help the wallet display the credential correctly.
    credential_issuer_metadata: {
      credential_endpoint: 'https://digital-credentials.dev/openid4vci/credential',
      credential_configurations_supported: {
        'org.iso.18013.5.1.mDL': {
          format: 'mso_mdoc',
          display: [{
            name: 'Driving License',
            locale: 'en-US',
            description: 'Mobile Driving License'
          }],
          // The claims that this document contains.
          // For a full list of standard mDL claims, see the ISO/IEC 18013-5 specification.
          claims: [{
            path: ['org.iso.18013.5.1', 'family_name'],
            display: [{ name: 'Family Name', locale: 'en-US' }]
          }
          // ... Add any other claims for your document here.
          ]
        }
      }
    }
  };

  // This call is made from the issuer's frontend, likely inside a button's click handler.
  try {
    await navigator.credentials.create({
      digital: {
        requests: [{
          // The protocol identifier for this version of OpenID4VCI.
          protocol: 'openid4vci-v1',
          data: credentialOffer
          }
        }]
      }
    });
    console.log('Credential issuance handoff to OS was successful.');
  } catch (e) {
    console.error('Error starting the credential issuance flow:', e);
  }

} else {
  // The API is not supported. Provide an alternative issuance method.
  console.log('Digital Credential Issuance API is not supported in this browser.');
}