Async support for wallet and witness syncrhonization

[dr-orlovsky]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 77 lines in your changes missing coverage. Please review.

Project coverage is 37.9%. Comparing base (5d5263a) to head (dce6cf9).
Report is 8 commits behind head on master.

Files with missing lines	Patch %	Lines
src/contracts.rs	0.0%	51 Missing ⚠️
src/popls/bp.rs	0.0%	26 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           master    #324     +/-   ##
========================================
- Coverage    38.7%   37.9%   -0.8%     
========================================
  Files          11      11             
  Lines        1767    1806     +39     
========================================
  Hits          684     684             
- Misses       1083    1122     +39     

Flag	Coverage Δ
rust	37.9% <0.0%> (-0.8%)	⬇️

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