[P2][testing] Add contract integration tests for NFT reward flow

[dzekojohn4]

Test game contract to NFT contract/receiver interactions, authorization, failure rollback, and duplicate claims.

[amujapromise9-dev]

@amujapromise9-dev has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi Maintainer, I’ve reviewed the NFT reward flow testing requirements and can add integration coverage across the game contract, NFT contract, and receiver interactions. I’ll verify authorization, rollback on failed transfers, and duplicate-claim protection, with focused tests covering both successful and failure paths.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @amujapromise9-dev to this issue.

[olaide2001]

@olaide2001 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I have the skills needed for this task, and I’m ready to handle it. Please consider giving me the opportunity.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @olaide2001 to this issue.

[Divine123431]

@Divine123431 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hello maintainer I'd love to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Divine123431 to this issue.

[Ire12]

@Ire12 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hey maintainer, I'm an expert in this kindly assign it to me

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Ire12 to this issue.

[solomon35-stack]

@solomon35-stack has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

can i be assigned this

ℹ️ Repo Maintainers: To accept this application, review their application or assign @solomon35-stack to this issue.

[drips-wave]

Congratulations, @solomon35-stack! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @solomon35-stack: 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.

Warning

When opening a PR, please link it to this issue to ensure it gets tracked accurately. Points are awarded when this issue is marked as completed by the maintainer.

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