🔧 Improve error handling in walletService

[Smartdevs17]

Problem

Errors are only logged, not returned with useful information.

Context

Users see generic errors or no feedback when operations fail.

Proposed Solution

Enhance error handling:

1. Return structured errors from service
2. Display user-friendly messages
3. Log detailed errors for debugging
4. Track error rates

Acceptance Criteria

• Errors returned with context
• User sees helpful message
• Errors logged properly
• Recovery suggestions where possible

Technical Notes

File: src/services/walletService.ts
Functions: Lines 53, 88, 135

Constraints

• Dont expose sensitive info
• Keep error messages short
• Consider error boundaries

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[Sendi0011]

@Sendi0011 has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Gm team, i will like to work on this, i am a frontend/smartcontract developer with experience skill solving issues like this. i am also an active Open source contributor.
ETA: 4 hours

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Congratulations, @Sendi0011! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on April 29, 2026.

🧑‍💻 @Sendi0011: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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This issue has been completed by @Sendi0011 as part of the Stellar Wave Program's 4th Wave 🥳

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