What-if Record external payment (rollup delta)

POST

/v1/actions/hospitality.action.record_external_payment/whatif

curl --request POST \
  --url https://api.aerandil.com/v1/actions/hospitality.action.record_external_payment/whatif \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{ "branch": "2489E9AD-2EE2-8E00-8EC9-32D5F69181C0", "params": { "amount": { "amount": "example", "currency": "example" }, "external_ref": "example", "method": "cash", "received_at": "2026-04-15T12:00:00Z", "reference": "example", "reservation_id": "2489E9AD-2EE2-8E00-8EC9-32D5F69181C0", "reservation_room_id": "2489E9AD-2EE2-8E00-8EC9-32D5F69181C0", "window_number": 1 }, "return_modified": false }'

• Production API

What-if projection of apply_hospitality_action_record_external_payment — 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.record_external_payment: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

amount

required

Amount

object

amount

required

string format: decimal

currency

required

string format: iso-4217

external_ref

Source-system key (makes the record replay-safe)

string

method

required

Method

string

Allowed values: cash credit_card debit_card bank_transfer voucher loyalty_points direct_billing mobile_wallet ota_collected other

received_at

Receipt instant in the source system (defaults to now)

string format: date-time

reference

Reference

string

reservation_id

required

Reservation whose stay folio receives the payment

string format: uuid

reservation_room_id

Leg whose stay folio receives the payment (required when the reservation has more than one stay)

string format: uuid

window_number

Folio window (defaults to 1)

integer

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.