Implement filter engine for invoice queries — status, date, amount range

[Kingsman-99]

Overview

Add a rich filter and query engine to the SDK for listing invoices. Callers can filter by status, creator, date range, amount range, and tags — all composed into a single typed query object.

Requirements

• client.queryInvoices(filter: InvoiceFilter): Promise<Page>
• InvoiceFilter { creator?, status?: InvoiceStatus[], minAmount?, maxAmount?, fromDate?, toDate?, tags?: string[], limit?, cursor? }
• Filters applied client-side against getCreatorInvoices + tag index results
• Page { items, nextCursor?, total } type
• Sorting: sort?: 'newest' | 'oldest' | 'highest' | 'lowest'
• Tests: each filter type independently, combined filters, pagination, empty results

Acceptance Criteria

• queryInvoices method with all filter types
• Pagination with cursor works
• Sorting works for all 4 options
• Empty results handled correctly
• npm test passes with zero failures
• TypeScript compiles with zero errors
• ESLint passes with zero errors

Definition of Done

All CI checks must pass before the PR is reviewed.

[ayandipe]

@ayandipe has applied to work on this issue as part of the Stellar Wave Program's 9th wave.

Hi maintainer,
Kindly assign task t me for precise and prompt resolution.

Kind Regards,

ℹ️ Repo Maintainers: To accept this application, review their application or assign @ayandipe to this issue.

[Yungmon22]

@Yungmon22 has applied to work on this issue as part of the Stellar Wave Program's 9th wave.

Hi Maintainer,

I’ve carefully reviewed the issue, its requirements, and the relevant documentation. I have a good understanding of the expected implementation and a proposed approach for addressing it. I’d appreciate the opportunity to briefly discuss the approach with you and ensure it aligns with the project’s expectations before moving forward.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Yungmon22 to this issue.

[Horpeyehmi]

@Horpeyehmi has applied to work on this issue as part of the Stellar Wave Program's 9th wave.

I can add a loading state that appears whenever a challenge filter is changed. This will make it clear that new results are being fetched instead of showing stale results. I will also test the status, minimum pool, and end date filters to make sure the loading state works correctly

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Horpeyehmi to this issue.

[maztah1]

@maztah1 has applied to work on this issue as part of the Stellar Wave Program's 9th wave.

can i work on this issue please

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[drips-wave]

Congratulations, @maztah1! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on September 30, 2026.

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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox!

@maztah1's PR #946 was approved and merged by @Kingsman-99.

🏆 @maztah1: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (850 total points). Track your full progress on GrantFox.

👏 Great work, @maztah1! Keep contributing to Stellar-split.

[drips-wave]

This issue has been completed by @maztah1 as part of the Stellar Wave Program's 9th Wave 🥳

😎 @maztah1: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here. You can also Leave a review to share your experience working on this issue.

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