Premium

Immutable audit history

Capture immutable workflow audit snapshots with linked SHA-256 hashes. Each entry records the actor, action, sequence, event/mutation identifiers, and the preceding hash so a supplied history can be checked for integrity.

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What you configure

getAuditHistory: Read the workflow's immutable audit snapshot.
verifyAuditHistory: Verify ordering and hash consistency in the supplied history.
persistAudit: Append entries to a customer-controlled durable ledger when required.

Essential integration

This assumes the shared Quick start already provides premiumLicense and, for UI views, premiumCalendarOptions. Only the feature-specific setup is shown.

import { EnterpriseCalendarWorkflow } from '@wts-calendar/core/enterprise-workflow';

const workflow = new EnterpriseCalendarWorkflow({
  license: premiumLicense,
  actor: { id: 'editor-1', roles: ['editor'] },
  online: false,
  autoFlush: false,
  events: [
    {
      id: 'release',
      title: 'Release window',
      start: '2026-09-07T09:00:00Z',
      end: '2026-09-07T10:00:00Z',
    },
  ],
  defaultPermission: 'deny',
  permissionPolicies: [
    {
      id: 'editor-update',
      effect: 'allow',
      actions: ['update', 'flush'],
      roles: ['editor'],
    },
  ],
});

await workflow.submit({
  type: 'update',
  eventId: 'release',
  changes: { title: 'Reviewed release' },
});
workflow.setOnline(true);
await workflow.flush();
export const history = workflow.getAuditHistory();
export const intact = await workflow.verifyAuditHistory(history);
console.log(intact, history);

Behavior and lifecycle

Audit appends are serialized and entries include both their own hash and the previous hash.
Verification can detect reordered, removed, or modified entries in the supplied chain.

Limits and responsibilities

Hash chaining does not make browser memory durable and cannot protect a history if an attacker can replace the whole chain.
This feature alone is not a compliance certification or a tamper-proof storage service.

Premium

Enable this capability

Optional module: @wts-calendar/core/enterprise-workflow
Local capability ID: enterprise-workflow · enabled by package-wide Premium

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The live example uses a browser-visible deployment key restricted to this package and approved origins. It does not collect license keys or visitor credentials.