DB transactions + other fixes/improvements

[zoedberg]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 95.19393% with 57 lines in your changes missing coverage. Please review.
✅ Project coverage is 95.28%. Comparing base (57a8803) to head (00bf9c0).
⚠️ Report is 13 commits behind head on master.

Files with missing lines	Patch %	Lines
src/wallet/online.rs	89.16%	39 Missing ⚠️
src/wallet/multisig.rs	96.00%	7 Missing ⚠️
src/error.rs	0.00%	5 Missing ⚠️
src/wallet/offline.rs	98.42%	3 Missing ⚠️
src/database/mod.rs	99.04%	2 Missing ⚠️
src/wallet/backup.rs	96.29%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #78      +/-   ##
==========================================
+ Coverage   94.95%   95.28%   +0.32%     
==========================================
  Files          23       23              
  Lines       12160    12379     +219     
==========================================
+ Hits        11547    11795     +248     
+ Misses        613      584      -29     

Flag	Coverage Δ
rust	95.28% <95.19%> (+0.32%)	⬆️

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