Block DEX for tokens with block_smart_contracts feature calling from the smart contracts.

[dzmitryhil]

Description

Block DEX for tokens with block_smart_contracts feature calling from the smart contracts.

Reviewers checklist:

• Try to write more meaningful comments with clear actions to be taken.
• Nit-picking should be unblocking. Focus on core issues.

Authors checklist

• Provide a concise and meaningful description
• Review the code yourself first, before making the PR.
• Annotate your PR in places that require explanation.
• Think and try to split the PR to smaller PR if it is big.

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This change is 

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 63.25%. Comparing base (daf6aee) to head (df06b2c).
Report is 33 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1015      +/-   ##
==========================================
+ Coverage   57.78%   63.25%   +5.46%     
==========================================
  Files         158      158              
  Lines       18324    18327       +3     
==========================================
+ Hits        10589    11592    +1003     
+ Misses       6748     5702    -1046     
- Partials      987     1033      +46     

Flag	Coverage Δ
coreum	57.80% <100.00%> (+0.01%)	⬆️
coreum-integration-tests-modules	53.06% <71.42%> (?)

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[miladz68]

Reviewed 4 of 4 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @masihyeganeh and @ysv)

[masihyeganeh]

Reviewed 4 of 4 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @ysv)

[masihyeganeh]

Reviewed 5 of 5 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @ysv)

[miladz68]

Reviewed 5 of 5 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @ysv)