[Contract] Decentralized Subscription & Recurring Billing

[ayomideadeniran]

[Contract] Decentralized Subscription & Recurring Billing

🚀 Feature Overview

Build a payment streaming contract that allows users to authorize a provider to pull a fixed amount of tokens from their wallet on a recurring time interval.

This is a complex, MVP-critical feature designed to elevate the smart contract architecture and expand the educational modules of the Web3 Student Lab platform.

🛠️ Implementation Requirements

• Implement EIP-1337 style signature allowances.\n- Handle cancellation and prorated refunds.\n- Ensure gas-efficient execution for the billing processor.

🔧 Technical Specifications

• Language/Environment: Rust / Soroban (or Solidity if specifically bridging).
• Adherence to strict architectural boundaries and gas optimization.
• High test coverage requirements (>90% unit testing in Rust).
• Prevent common vectors: Reentrancy, Integer Overflow/Underflow, and Oracle Manipulation.

✅ Acceptance Criteria

• Contract implemented according to requirements.
• Comprehensive unit and integration tests passing.
• Security review completed (no critical vulnerabilities).
• Comprehensive documentation written using NatSpec/Rustdoc.

🎓 Difficulty Level

Advanced - Requires deep understanding of Web3 security, cryptography, and smart contract design patterns.

⏱️ Timeline

ETA: 3-5 days

🏷️ Labels

contract, commerce, mvp-critical

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Note to Contributors: Break down work into smaller PRs for easier review, focusing on core logic first before adding complex modifiers.

[eonuh]

@eonuh has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hey Maintainer, I have gone through the details of the issue and i am capable of resolving it, I would love to be assigned to work on it ASAP. Thanks in advance

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

[luhrhenzthedev]

@luhrhenzthedev has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

i would love to work on this

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

[drips-wave]

Congratulations, @luhrhenzthedev! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 2, 2026.

🧑‍💻 @luhrhenzthedev: 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.

🤠 Repo maintainers: Please keep an eye on the contributor's progress and review their work before the due date. You can manage this issue, including adjusting its complexity and points, here.

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