fix(api-sync): various fixes and unit test coverage

[oXtxNt9U]

Summary

Checklist

• Documentation (if necessary)
• Tests (if necessary)
• Ready to be merged

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 76.09%. Comparing base (50eb6a7) to head (bd9cf44).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1385      +/-   ##
===========================================
+ Coverage    74.42%   76.09%   +1.66%     
===========================================
  Files          927      939      +12     
  Lines        15284    16003     +719     
  Branches      1701     2006     +305     
===========================================
+ Hits         11375    12177     +802     
+ Misses        3904     3819      -85     
- Partials         5        7       +2     

Flag	Coverage Δ
contracts	96.98% <ø> (?)
packages	75.46% <100.00%> (+1.04%)	⬆️

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