What-if Offer stay (rollup delta)

POST

/v1/actions/hospitality.action.offer_stay/whatif

curl --request POST \
  --url https://api.aerandil.com/v1/actions/hospitality.action.offer_stay/whatif \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{ "branch": "2489E9AD-2EE2-8E00-8EC9-32D5F69181C0", "params": { "adults": 1, "arrival_date": "2026-04-15", "departure_date": "2026-04-15", "offered_at": "2026-04-15T12:00:00Z", "property_id": "2489E9AD-2EE2-8E00-8EC9-32D5F69181C0", "rate_plan_id": "2489E9AD-2EE2-8E00-8EC9-32D5F69181C0", "room_type_id": "2489E9AD-2EE2-8E00-8EC9-32D5F69181C0", "session_id": "example", "source": "direct_web", "visitor_id": "example" }, "return_modified": false }'

• Production API

What-if projection of apply_hospitality_action_offer_stay — 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.offer_stay: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

adults

required

Adults — the occupancy the grid is priced at

integer

arrival_date

required

Arrival

string format: date

departure_date

required

Departure (the arrival date for a day-use slot)

string format: date

offered_at

When the shopper was quoted (defaults to now; must not be in the future)

string format: date-time

property_id

required

The house quoting

string format: uuid

rate_plan_id

required

Rate plan offered

string format: uuid

room_type_id

required

Room type offered

string format: uuid

session_id

The visit's session — its first offer's id; omit to open one

string

source

Channel the shopper came through (defaults to direct_web)

string

Allowed values: direct_web direct_call property_direct ota gds wholesale corporate walk_in group_block agent loyalty

visitor_id

The key the house issued for this browser; omit to be issued one

string

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.