swap unwrap with ?

[eriktaubeneck]

We previously used unwrap before the protocol was complete (and caught the panic in the test). Now that we don't expect this to panic, we should use ?.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.29%. Comparing base (4f112ad) to head (df57252).
Report is 8 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1495   +/-   ##
=======================================
  Coverage   93.29%   93.29%           
=======================================
  Files         237      237           
  Lines       43510    43510           
=======================================
  Hits        40592    40592           
  Misses       2918     2918           

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