What-if Enrol member (rollup delta)

POST

/v1/actions/hospitality.action.enrol_member/whatif

curl --request POST \
  --url https://api.aerandil.com/v1/actions/hospitality.action.enrol_member/whatif \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{ "branch": "2489E9AD-2EE2-8E00-8EC9-32D5F69181C0", "params": { "account_id": "example", "effective_from": "2026-04-15T12:00:00Z", "enrolment_kind": "direct_enrolment", "home_property_id": "2489E9AD-2EE2-8E00-8EC9-32D5F69181C0", "initial_tier_id": "2489E9AD-2EE2-8E00-8EC9-32D5F69181C0", "member_number": "example", "primary_person_id": "2489E9AD-2EE2-8E00-8EC9-32D5F69181C0" }, "return_modified": false }'

• Production API

What-if projection of apply_hospitality_action_enrol_member — previews the action (execute-and-roll-back) and folds its would-be events into rollup deltas, returning the contribution an apply would make to the daily_rooms fact (ADR / RevPAR / TRevPAR / Occupancy inputs) without persisting anything. Requires the same actions:hospitality.action.enrol_member:apply scope as apply. An action that emits no rooms-fact events yields an empty daily_rooms.

Authorizations

• aerandil_oauth

Request Body^required

Media typeapplication/json

object

branch

Apply against an open branch’s overlay view instead of the canonical (main) plane. The action’s writes land in the branch’s copy-on-first-write overlay, its events in the branch’s own stream, and the invocation is journaled for merge-by-replay. Branch writes are action-only, so this is the write-side entry point to a branch (POST /v1/branches forks one).

string format: uuid

params

required

object

account_id

Caller-supplied account id (UUID string; engine-mints when omitted)

string

effective_from

required

Tier attachment start

string format: date-time

enrolment_kind

required

How the membership came to exist

string

Allowed values: direct_enrolment inherited gifted reciprocity corporate_seat

home_property_id

Home property

string format: uuid

initial_tier_id

required

Initial tier

string format: uuid

member_number

required

Operator-side member number

string

primary_person_id

Primary member (typed person reference)

string format: uuid

return_modified

When true, the response carries modified_objects and modified_links projections — the engine reads the event log inside the same transaction so the projection observes the handler’s own writes.

boolean

Responses

200

Rollup deltas the action would contribute, computed and rolled back.

Media typeapplication/json

object

daily_rooms

required

Per (property, business_date) additive contribution to the rooms rollup.

Array<object>

object

business_date

required

string format: date

currency

ISO 4217, when the fold observed one.

string

property_id

required

string format: uuid

rooms_revenue_net_delta

required

Decimal, net rooms revenue delta.

string

rooms_sold_delta

required

integer format: int64

total_revenue_net_delta

required

Decimal, net total revenue delta.

string

Example^generated

{
  "daily_rooms": [
    {
      "business_date": "2026-04-15",
      "currency": "example",
      "property_id": "2489E9AD-2EE2-8E00-8EC9-32D5F69181C0",
      "rooms_revenue_net_delta": "example",
      "rooms_sold_delta": 1,
      "total_revenue_net_delta": "example"
    }
  ]
}

Headers

Cache-Control

string

Allowed value: no-store

Always no-store — derived, uncommitted data.

422

Validation error — the apply would be rejected.