Build subscription proration calculator with transparency

[Smartdevs17]

Context

Proration needs transparency and calculation tools.

Current Limitation

Proration is opaque.

Expected Outcome

• Proration calculator
• Transparent proration display
• Proration analytics
• Proration documentation

Acceptance Criteria

• Proration calculator
• Transparent proration display
• Proration analytics
• Proration documentation
• Proration configuration
• Proration API
• Proration testing

[abdulazizishaq212-prog]

@abdulazizishaq212-prog has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

i will like to work on your issue,assign me

ℹ️ Repo Maintainers: To accept this application, review their application or assign @abdulazizishaq212-prog to this issue.

[David-Savio]

@David-Savio has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi maintainer. I can resolve this issue quickly, if assigned to me. Thank you.

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

[morelucks]

@morelucks has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hello,

I’m a smart contract and full-stack developer interested in contributing to this issue.

I have experience contributing through OnlyDust and have participated in Drips Wave 1, Wave 2, Wave 5, as well as the GrantFox beta campaign.

My technical background includes Rust, Soroban, Cairo, Solidity, and TypeScript, with a focus on building secure, scalable, and maintainable blockchain applications.

Based on the scope of this issue, I’m confident I can deliver a complete and well-tested solution within 24 hours of assignment. I prioritize clean code, clear documentation, and efficient implementation.

I’d appreciate the opportunity to contribute and help move this issue forward.

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

[drips-wave]

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

🧑‍💻 @morelucks: 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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🌊 Happy Wave 🌊