fix: fix hex to BN conversion

[salimtb]

Description

conversion from hex to BN doesn't work for very large numbers, because the convertHexToDecimal function uses parseInt to convert from hex to decimal, but for numbers greater than 54 digits this may send an incorrect result.

the fix was to use toHexBN function

Related issues

Fixes: #8703

Manual testing steps

1. Click on any token where you hold a large amount
   2.Go to the received/sen activity

Screenshots/Recordings

Before

After

Pre-merge author checklist

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• I've included manual testing steps
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Pre-merge reviewer checklist

• I've manually tested the PR (e.g. pull and build branch, run the app, test code being changed).
• I confirm that this PR addresses all acceptance criteria described in the ticket it closes and includes the necessary testing evidence such as recordings and or screenshots.

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[github-actions]

E2E test started on Bitrise: https://app.bitrise.io/app/be69d4368ee7e86d/pipelines/bca0d0cf-c909-4f3d-bb9a-d78ee8f9aee1
You can also kick off another Bitrise E2E smoke test by removing and re-applying the (Run Smoke E2E) label

[Cal-L]

Small comment

[Cal-L]

LGTM

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 41.53%. Comparing base (4869690) to head (e2aaea3).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #8734      +/-   ##
==========================================
+ Coverage   41.46%   41.53%   +0.07%     
==========================================
  Files        1264     1268       +4     
  Lines       30622    30663      +41     
  Branches     3008     3011       +3     
==========================================
+ Hits        12697    12737      +40     
  Misses      17172    17172              
- Partials      753      754       +1     

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[sonarcloud]

Quality Gate passed

Issues
0 New issues

Measures
0 Security Hotspots
100.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud