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1. issued_at, issued_by is mandatory for documents
2. Validate dates
   1. issued_at <= now() and issued_at => birth_date
      1.  in case `issued_at > now()` show error 422, "Document issued date should be in the past"
      2.  in case `issued_at < person.birth_date` show error 422, "Document issued date should greater than person.birth_date "
   2. expiration_date > now()
      1.  in case error show 422, "Document expiration_date should be in future"
      2. expiration_date is mandatory for document_type
         • NATIONAL_ID
         • COMPLEMENTARY_PROTECTION_CERTIFICATE
         • PERMANENT_RESIDENCE_PERMIT
         • REFUGEE_CERTIFICATE
         • TEMPORARY_CERTIFICATE
         • TEMPORARY_PASSPORT
      3. in case error return 422, "expiration_date is mandatory for document_type $.documents.type"
3. Validate documents_type.number according to json schema 
   1. PASSPORT - `^((?![ЫЪЭЁ])([А-ЯҐЇІЄ])){2}[0-9]{6}$`
   2. NATIONAL_ID - `^[0-9]{9}$`
   3. BIRTH_CERTIFICATE - `` ^(?![ыъэ@%&$^#`~:,.*|}{?!])[А-ЯҐЇІЄа-яґїіє0-9 №\\\"()-]+$ ``
   4. COMPLEMENTARY_PROTECTION_CERTIFICATE - `^((?![ЫЪЭЁ])([А-ЯҐЇІЄ])){2}[0-9]{6}$`
   5. PERMANENT_RESIDENCE_PERMIT - `^((?![ЫЪЭЁ])([А-ЯҐЇІЄ])){2}[0-9]{6}$`
   6. REFUGEE_CERTIFICATE - `^((?![ЫЪЭЁ])([А-ЯҐЇІЄ])){2}[0-9]{6}$`
   7. TEMPORARY_CERTIFICATE - `^((?![ЫЪЭЁ])([А-ЯҐЇІЄ])){2}[0-9]{6}$`
   8. TEMPORARY_PASSPORT - `` ^(?![ыъэ@%&$^#`~:,.*|}{?!])[А-ЯҐЇІЄа-яґїіє0-9 №\\\"()-]+$ `
4. if `unzr`exists and is not null and matches "^[0-9]{8}-[0-9]{5}$" check if first 8 symbols = birth_date
   1. in case error return 422, msg "unzr or birthdate are not correct"

5. if documents.type=NATIONAL_ID

   1. check if unzr exists in request, in case error return 422, msg "unzr is mandatory for document type NATIONAL_ID"

6. Document numbersmaxLength < 25 

Determine

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Invoke Gandalf to obtain auth method according to internal rules:

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auth

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method

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Set IL.declaration_request.authentication_method_current:

{
  "authentication_method": GandalfResponse.$.data.final_decision,
  "authentication_number": DeclarationRequest.$.declaration_request.person.authentication_methods.[0].number
}

Determine preferable auth method for existing MPI

Set IL.declaration_request.authentication_method_current:

...

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Determine Channel

1. channel from url
   
   1. if url is for cabinet сhannel set declaration_request.сhannel = CABINET
      1. if not - set declaration_request.сhannel = MIS

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