New APIs required by RGB Node

[dr-orlovsky]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 40 lines in your changes missing coverage. Please review.

Project coverage is 37.1%. Comparing base (dce6cf9) to head (3154b79).
Report is 8 commits behind head on master.

Files with missing lines	Patch %	Lines
src/contracts.rs	0.0%	26 Missing ⚠️
src/popls/bp.rs	0.0%	14 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           master    #325     +/-   ##
========================================
- Coverage    37.9%   37.1%   -0.8%     
========================================
  Files          11      11             
  Lines        1806    1843     +37     
========================================
  Hits          684     684             
- Misses       1122    1159     +37     

Flag	Coverage Δ
rust	37.1% <0.0%> (-0.8%)	⬇️

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