Update balance precheck to better handle large accounts

[Nana-EC]

Signed-off-by: Nana-EC nana@swirldslabs.com

Description:
Update balance precheck to better handle large accounts
Involve ethers in calculation

• Add getAccountBalanceInTinyBar to sdkClient
• Use ethers to calculate wei, thus avoid to string conversion management causing issue
• Add integration tests

Related issue(s):

Fixes #327

Notes for reviewer:

Checklist

• Documented (Code comments, README, etc.)
• Tested (unit, integration, etc.)

[sonarqubecloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[codecov-commenter]

Codecov Report

Merging #328 (1251f11) into main (194e120) will increase coverage by 1.26%.
The diff coverage is 60.00%.

@@            Coverage Diff             @@
##             main     #328      +/-   ##
==========================================
+ Coverage   58.29%   59.55%   +1.26%     
==========================================
  Files           9        9              
  Lines         856      858       +2     
  Branches      139      139              
==========================================
+ Hits          499      511      +12     
+ Misses        325      315      -10     
  Partials       32       32              

Impacted Files	Coverage Δ
packages/relay/src/lib/clients/sdkClient.ts	6.79% <0.00%> (-0.14%)	⬇️
packages/relay/src/lib/precheck.ts	77.41% <100.00%> (+17.74%)	⬆️
packages/relay/src/lib/clients/mirrorNodeClient.ts	81.61% <0.00%> (+0.73%)	⬆️

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[ar-conmit]

LGTM

[natanasow]

LGTM