fuzz test txs

[tzemanovic]

Describe your changes

Indicate on which release or other PRs this topic is based on

0.40.0

Checklist before merging to draft

• [ ] I have added a changelog
• [ ] Git history is in acceptable state

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 23.14815% with 166 lines in your changes missing coverage. Please review.

Project coverage is 61.16%. Comparing base (7e9239d) to head (a47bfa7).

Files	Patch %	Lines
crates/tx/src/types.rs	10.34%	52 Missing :warning:
crates/core/src/key/secp256k1.rs	31.91%	32 Missing :warning:
crates/core/src/key/ed25519.rs	36.36%	21 Missing :warning:
crates/tx/src/data/pos.rs	0.00%	8 Missing :warning:
crates/governance/src/storage/proposal.rs	0.00%	7 Missing :warning:
crates/core/src/address.rs	0.00%	4 Missing :warning:
crates/core/src/eth_bridge_pool.rs	0.00%	4 Missing :warning:
crates/core/src/token.rs	0.00%	4 Missing :warning:
crates/core/src/masp.rs	0.00%	3 Missing :warning:
crates/trans_token/src/storage.rs	50.00%	3 Missing :warning:
... and 19 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3445      +/-   ##
==========================================
- Coverage   61.25%   61.16%   -0.09%     
==========================================
  Files         315      315              
  Lines      102806   102982     +176     
==========================================
+ Hits        62972    62991      +19     
- Misses      39834    39991     +157     

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