# {{page-title}} (Transaction ERESULT-21)

## General
This service a for deleting a service that shouldn't have been sent to the eResult in its current state.

## Business notes
### Rules
- A result sent can only cancel once, if consumer try to cancel one more than once - il will fail

### Impact on resources
A result cancellation will impact FHIR resources as follow:
- Resource DiagnosticReport
=> Status "Cancelled"
- Resource Communication
=> Status "Stopped" ou "Enterred-in-error"  -- See below for more details

Depending if result has been sent to its recipient (status == "completed"), the resulting status of a cancellation will be different:
- If a result has *not* been read(received) by its recipient, That is Communication has "status== in-progress", then the status of the Communication will become: "status== stopped"
- If a result has been read(received) by its recipient, That is Communication has "status== completed", then the status of the Communication will become: "entered-in-error"
This distinction status may be used later to Communicate cancellation to a recipient that would have already read a result later cancelled


## Input
**For Security reason, URL (Base and Query parameter), Authentification mechanism are supplied privately documentation supplied by Agence eSanté to each integrator**

This service has no body.


## Output
### Success
In case of success, the API will returned:
- A HTTP Code 200
- a Bundle with type transaction-response.

Each entry of the Bundle contain a 'response' containing itself a:
- A status which is "200 OK"
- Location (Id of the updated ressource. ie: "Communication/8286d34f-f5bd-416a-bd12-7773cb3592ce/_history/2"
- An OperationOutcome indicating that this is successfull

Full example can be found  [here]
(https://simplifier.net/eprescriptionlux/6b528d9e-c692-4b11-9407-b137f4005625)


### Error
In case of error, an OperationOutcome will be returned. 
See {{pagelink:Home/Error-Handling.page.md}} for more information.

Main errors related to this service are:

| HTTP Code | eResult error code | Description |
| ------------ | ----------- | ------------- |
| 404 | ERESULT_0201 | Consumer try to cancel result that doesn't exist |
| 409 | ERESULT_0202 | Consumer try to cancel an already cancelled result |