as i understand i am using tools 1-4

i am not sure i understand your second question. I am using Enrollment Method key and url to create LTI connection.

i made more tests and received 'Duplicate nonce detected' error. Please see the details below

Execute scheduled task: Publish as LTI tool grade sync (enrol_lti\task\sync_grades)

Starting - Grade sync for shared tool '5' for the course '5'.

Header:

(

    [0] => Authorization: OAuth realm="",oauth_version="1.0",oauth_nonce="2a5ccc62b43224448f4a70877efbf6d8",oauth_timestamp="1490797698",oauth_consumer_key="123",oauth_body_hash="U0HsJipsIPyQi%2Fc7yb2o7Cu%2FOwI%3D",oauth_signature_method="HMAC-SHA1",oauth_signature="TeZa76Ml7%2B6IJHyBxbcTX%2FAhNqA%3D"

    [1] => Content-type: application/xml

)

 Body:

<?xml version="1.0" encoding="UTF-8"?>

            <imsx_POXEnvelopeRequest xmlns="http://www.imsglobal.org/services/ltiv1p1/xsd/imsoms_v1p0">

              <imsx_POXHeader>

                <imsx_POXRequestHeaderInfo>

                  <imsx_version>V1.0</imsx_version>

                  <imsx_messageIdentifier>1490797698</imsx_messageIdentifier>

                </imsx_POXRequestHeaderInfo>

              </imsx_POXHeader>

              <imsx_POXBody>

                <replaceResultRequest>

                  <resultRecord>

                    <sourcedGUID>

                      <sourcedId>5-2-7-6-18dc7ca3a05a44f1924650645707e006eda35662</sourcedId>

                    </sourcedGUID>

                    <result>

                      <resultScore>

                        <language>en-us</language>

                        <textString>0.57</textString>

                      </resultScore>

                    </result>

                  </resultRecord>

                </replaceResultRequest>

              </imsx_POXBody>

            </imsx_POXEnvelopeRequest>Array

Error Response from  http://canvas.org.com/api/lti/v1/tools/5/grade_passback

{"errors":[{"message":"Duplicate nonce detected"}],"error_report_id":1136}

Failed - The grade '0.57' for the user '16' in the tool '5' for the course '5' failed to send.

Completed - Synced grades for tool '5' in the course '5'. Processed 1 users; sent 0 grades.

These are given by the consumer so it's possible that blackboard is not providing them.

We can check by reviewing the request sent to moodle from blackboard when the tool is first used by a new user.

Have you set up the shared activities/courses on your LTI consumer yet? (This needs to be done first) If so, it should sync the grades when you run that command