# 3642 Dry Run Virtual Users

### feat/3642-dry-run-virtual-user

GET virtual user by DID (GET /api/v1/policies/:policyId/dry-run/user/:did)

* Returns a single virtual user by their DID in dry-run mode
* Requires POLICIES\_POLICY\_UPDATE permission

Create virtual user v2 (POST /api/v1/policies/:policyId/dry-run/user with header Api-Version: 2)

* Creates a virtual user and returns only the created user object:

{ "username": "Virtual User 3", "did": "did:...", "hederaAccountId": "0.0.123", "active": false }

* More efficient than v1 — no need to re-fetch the full user list after creation

#### Deprecations

Create virtual user v1 (POST /api/v1/policies/:policyId/dry-run/user)

* Deprecated. Scheduled for removal: 2026-07-24 (4 months per API Deprecation Policy)
* v1 creates a virtual user and returns the full list of all virtual users (array)
* Migration: add header Api-Version: 2 to receive only the created user object instead
* Frontend has already been migrated to v2

#### Internal Changes

* Added CREATE\_VIRTUAL\_USER\_V2 NATS event in PolicyEngineEvents
* Added GET\_VIRTUAL\_USER NATS event in PolicyEngineEvents
* Added countVirtualUsers() and getVirtualUser(did) methods to DatabaseServer
* Username generation optimized: uses countVirtualUsers() instead of loading all users

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