Add Soroban contract event filtering and search

[Just-Bamford]

Problem

\subscribeContractEvents()\ emits all events. No way to search historical events or filter by criteria.

Solution

Implement \queryContractEvents(contractId, filter?: EventFilter)\ in \src/soroban/index.ts. Searches Horizon for matching events.

Acceptance Criteria

• Function added to \src/soroban/index.ts\
• Accepts event name, topic patterns
• Returns filtered event array
• Tests cover various filters

Note for contributors

Reference Soroban event structure. Add tests to \src/tests/soroban.test.ts.

[goodness-cpu]

@goodness-cpu has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello Maintainer, I can fix this issue.

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[charlesejemai-cyber]

@charlesejemai-cyber has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

i would like to work on this, thanks

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[Johnpii1]

@Johnpii1 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello Sir,

I came across your project and I’m really interested in contributing.

I have experience with React for building responsive, user-friendly interfaces, and I’m also familiar with smart contracts and blockchain basics. I focus on writing clean, scalable code and improving user experience.

I’m a fast learner and ready to get started immediately. Please let me know the next steps.

Thank you.

Best regards,
johnpaul

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[Kenlachy]

@Kenlachy has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

I will like to work on this issue. Please assign to me. Thank you.

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[Joeloo1]

@Joeloo1 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

I’d like to work on this issue. Please assign it to me. Thanks!

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[drips-wave]

Congratulations, @charlesejemai-cyber! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

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