Validate min_funding_bps is in range 0-10 000 at invoice creation

[Kingsman-99]

Description

min_funding_bps sets the minimum percentage of the invoice total that must be funded before release. There is no bounds check; a value above 10 000 would require more than 100% funding, making the invoice permanently unreleasable.

Acceptance Criteria

• create_invoice returns ContractError::InvalidAmount when min_funding_bps > 10_000
• Validation is present before any storage writes
• Unit test: min_funding_bps = 10_001 is rejected
• Unit test: min_funding_bps = 10_000 is accepted
• cargo test passes

Context

• Target file: contracts/split/src/lib.rs

[Ayomide3271]

@Ayomide3271 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi Maintainer, I’d be glad to take on this issue. I’ve worked on similar tasks before and have a good understanding of the kind of work involved. I’m available to start right away and can dedicate time to investigating the issue, implementing a clean solution, and testing it thoroughly. I’d also be happy to discuss the approach or provide any additional information about my experience if needed. Looking forward to contributing to the project.

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[CodedBay]

@CodedBay has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

please assign

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

[drips-wave]

Congratulations, @CodedBay! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

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