chore: replaces redundant codes in the HashNode with a proper function call

[staheri14]

Overview

Closes #130

Checklist

• [x] New and updated code has appropriate documentation
• [x] New and updated code has new and/or updated testing
• [x] Required CI checks are passing
• [x] Visual proof for any user facing features like CLI or documentation updates
• [x] Linked issues closed with keywords

[codecov[bot]]

Codecov Report

Merging #190 (37e614d) into master (f6e7254) will decrease coverage by 0.04%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #190      +/-   ##
==========================================
- Coverage   95.74%   95.71%   -0.04%     
==========================================
  Files           5        5              
  Lines         564      560       -4     
==========================================
- Hits          540      536       -4     
  Misses         14       14              
  Partials       10       10              

Impacted Files	Coverage Δ
hasher.go	97.60% <100.00%> (-0.08%)	:arrow_down: