Syncer for side chain

[SebastianMarian]

Description of the reasoning behind the pull request (what feature was missing / how the problem was manifesting itself / what was the motive behind the refactoring)

• Added support for side chain syncer

Proposed Changes

Testing procedure

[codecov-commenter]

Codecov Report

:exclamation: No coverage uploaded for pull request base (feat/chain-go-sdk@615e090). Click here to learn what that means. Patch has no changes to coverable lines.

Additional details and impacted files

@@                 Coverage Diff                  @@
##             feat/chain-go-sdk    #4591   +/-   ##
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  Coverage                     ?   70.52%           
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  Files                        ?      636           
  Lines                        ?    83909           
  Branches                     ?        0           
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  Hits                         ?    59181           
  Misses                       ?    20295           
  Partials                     ?     4433           

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