Provide metadata validation to the proposal list and on the GA creation

[MSzalowski]

1. Provide new POST endpoint that would accept metadat url and hash and return the status of the validation. Example payload:

   {
   "url": "http://example.metadata.url",
   "hash": "some-example-blake2b-256-hash",
   }

   Example response:

• Incorrect format - when fields of JSONLD file provided under url don't match the CIP-108 standard.

  {
  "status": "INCORRECT_FORMAT",
  }

• Incorrect jsonld - when file is not canonizable by jsonld standard

  {
  "status": "INCORRECT_JSONLD",
  }

• Incorrect hash - when hash of the file provided under url doesn't match provided hash

  {
  "status": "INCORRECT_HASH",
  }

• Url not found - when provided url is not reachable.

  {
  "status": "URL_NOT_FOUND",
  }

If validation passes for all the cases response can be any eg.: { "valid": true }

2. Extend existing endpoints of such validation.

Provide to: GET /proposal/list GET /proposal/get/{proposalId} GET /drep/getVotes/{drepId}

• Validation described on the point 1
• Additional field that informs about the validation status to each proposal/vote

[pmbinapps]

Still blocked to check on dev-sancho and test-sancho env:

Blocked by: [

](https://github.com/IntersectMBO/govtool/issues/1011)

https://github.com/IntersectMBO/govtool/issues/1015

[pmbinapps]

OK Adding proposal NOT OK - showing proposals - tracked here

[pmbinapps]

OK,  TBC - response ok, status ok, for case: URL ok, hash ok, expected: 200, status: None - NOT STATUS FOR CORRECT STATE 
Inputs:
 {
    "url": "https://raw.githubusercontent.com/mpawel79/testrepo/master/InfoJune03.jsonld",
    "hash": "eebfff0e2213ff0c5331e6d9d99d47a5a825dce7053671b6ed4daae4b4e0df5e"
}
Response code: 200
{
    "status": null,
    "valid": false,
    "raw": {
        "metadata": {
            "abstract": "test",
            "motivation": "test",
            "rationale": "test",
            "references": [
                "https://test.com/"
            ],
            "title": "test"
        },
        "valid": true
    }
}
--------------------

OK - response ok, status ok, for case: URL ok, corrupted hash aa: expected: INCORRECT_HASH 
Inputs:
 {
    "url": "https://raw.githubusercontent.com/mpawel79/testrepo/master/InfoJune03.jsonld",
    "hash": "aabfff0e2213ff0c5331e6d9d99d47a5a825dce7053671b6ed4daae4b4e0df5e"
}
Response code: 200
{
    "status": null,
    "valid": false,
    "raw": {
        "metadata": {
            "abstract": "test",
            "motivation": "test",
            "rationale": "test",
            "references": [
                "https://test.com/"
            ],
            "title": "test"
        },
        "status": "INVALID_HASH",
        "valid": false
    }
}
--------------------

OK - response ok, status ok, for case: URL ok, empty hash, expected: INCORRECT_HASH
Inputs:
 {
    "url": "https://raw.githubusercontent.com/mpawel79/testrepo/master/InfoJune03.jsonld",
    "hash": ""
}
Response code: 200
{
    "status": null,
    "valid": false,
    "raw": {
        "metadata": {
            "abstract": "test",
            "motivation": "test",
            "rationale": "test",
            "references": [
                "https://test.com/"
            ],
            "title": "test"
        },
        "status": "INVALID_HASH",
        "valid": false
    }
}
--------------------

OK - response ok, status ok, for case: URL to not existing file, hash ok: expected: URL_NOT_FOUND
Inputs:
 {
    "url": "https://raw.githubusercontent.com/mpawel79/testrepo/master/NOT_EXISTS.jsonld",
    "hash": "eebfff0e2213ff0c5331e6d9d99d47a5a825dce7053671b6ed4daae4b4e0df5e"
}
Response code: 200
{
    "status": null,
    "valid": false,
    "raw": {
        "status": "URL_NOT_FOUND",
        "valid": false
    }
}
--------------------

OK - response not ok, status ok, for case: Empty URL, empty hash, expected: response - an error code
Inputs:
 {
    "url": "",
    "hash": ""
}
Response code: 200
{
    "status": null,
    "valid": false,
    "raw": {
        "status": "URL_NOT_FOUND",
        "valid": false
    }
}
--------------------

Below tracked in issue https://github.com/IntersectMBO/govtool/issues/1150:

NOT OK, TBC - response is 200, status is null but hash is not for provied json, for case: URL to other json (drep format), hash ok - expected: INCORRECT_JSONLD
Inputs:
 {
    "url": "https://github.com/mpawel79/testrepo/blob/master/PawelDrep.jsonld",
    "hash": "eebfff0e2213ff0c5331e6d9d99d47a5a825dce7053671b6ed4daae4b4e0df5e"
}
Response code: 200
{
    "status": null,
    "valid": false,
    "raw": {
        "valid": true
    }
}
--------------------

NOT OK - response not ok, status not ok, for case: valid URL to corrupted json, hash ok - expected: INCORRECT_JSONLD
Inputs:
 {
    "url": "https://raw.githubusercontent.com/mpawel79/testrepo/master/test_INVALID_JSON_FORMAT.jsonld",
    "hash": "eebfff0e2213ff0c5331e6d9d99d47a5a825dce7053671b6ed4daae4b4e0df5e"
}
Response code: 200
{
    "status": null,
    "valid": false,
    "raw": {
        "valid": true
    }
}
--------------------

NOT OK - response ok, status not given - some other error msg, for INCORRECT_HASH not resturned,  URL ok, corrupted hash to long: expected: INCORRECT_HASH
Inputs:
 {
    "url": "https://raw.githubusercontent.com/mpawel79/testrepo/master/InfoJune03.jsonld",
    "hash": "CORRUPTED_eebfff0e2213ff0c5331e6d9d99d47a5a825dce7053671b6ed4daae4b4e0df5e"
}
Response code: 400
{
    "combinator": "ReqBody'",
    "error": "Error in $.hash: mzero"
}
--------------------

Click to add a cell.

OK - no error 500 was returned

TBC - status - for postive case - nothing returned when all is fine