fix(chart/service)!: fix support for more than 2 parties

[sbckr]

No description provided.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.07%. Comparing base (c80b3b1) to head (3e902b9).

Additional details and impacted files

@@            Coverage Diff            @@
##             master      #74   +/-   ##
=========================================
  Coverage     85.07%   85.07%           
  Complexity      300      300           
=========================================
  Files            56       56           
  Lines          1045     1045           
  Branches         70       70           
=========================================
  Hits            889      889           
  Misses          125      125           
  Partials         31       31           

Flag	Coverage Δ
service	89.11% <ø> (ø)

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[strieflin]

LGTM