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Validate digital sign as described on sign patient request process

Check signed content

Check decoded signed content with previously created on IL.db.

SELECT data
FROM merge_requests
WHERE id = {:id}

In case if they are not equal - generate 422 error (message: "Signed content does not match the previously created content")

Validate schema

Validate request using schema (TBD)

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1. Validate merge request id exists in DB

   1. In case of error - return 404

2. Check merge request status is APPROVED

   1. In case of error - return 422 (Incorrect status to sign merge request)

Check signed content

1. Get previously request data from il.merge_requests.data.

2. Compare it with request data_ to_be_signed field.

   1. In case they are not equal - return 422 error (Signed content does not match the previously created content)

3. Check patient_signed = true. It means that person signed printout content.

   1. In case of error - return 422 error (Patient must sign merge request form).

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