chore: refactor usage of promises into async/await

[Strum355]

Removes extraneous try { } catch(e) { throw e }, unwraps usage of new Promise wrapped by try catch into direct async-awaits, and some other minor formatting changes/multiline string usage/missing parameter types.

[ruromero]

LGTM I only added an optional change unrelated to the purpose of this PR

[codecov-commenter]

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 98.70%. Comparing base (31f46bf) to head (4081fbc).
Report is 1 commits behind head on master.

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #758      +/-   ##
==========================================
- Coverage   98.73%   98.70%   -0.04%     
==========================================
  Files          13       13              
  Lines         395      385      -10     
  Branches       53       52       -1     
==========================================
- Hits          390      380      -10     
  Misses          3        3              
  Partials        2        2              

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