fix: do not crash on using [fullhash]

[alexander-akait]

This PR contains a:

• bugfix
• new feature
• code refactor
• test update
• typo fix
• metadata update

Motivation / Use-Case

fixes #694

Breaking Changes

No

Additional Info

No

[codecov]

Codecov Report

Merging #695 (e54168f) into master (d18cbfc) will increase coverage by 0.06%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #695      +/-   ##
==========================================
+ Coverage   88.87%   88.93%   +0.06%     
==========================================
  Files          11       11              
  Lines         692      696       +4     
  Branches      191      194       +3     
==========================================
+ Hits          615      619       +4     
  Misses         74       74              
  Partials        3        3              

Impacted Files	Coverage Δ
src/index.js	91.89% <100.00%> (+0.12%)	⬆️

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