Detect Improper ERC20 Approval Patterns

[mijinummi]

🧠 Concept

Detect unsafe ERC20 approval flows.

⚠️ Problem

Direct approval changes may introduce race conditions.

📁 Implementation Scope

• rules/security/tokens/

✅ Requirements

• Detect approve overwrite patterns
• Suggest increase/decrease allowance

🎯 Acceptance Criteria

• Unsafe approvals detected

[BigElv]

@BigElv has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi maintainer! I’d love to work on this issue if it’s still available. I have a good understanding of the requirements and would be happy to implement the solution. Thanks for considering my request!

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

[CodePrincess360]

@CodePrincess360 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hey Maintainer!

I would really love to work on this issue!

ℹ️ Repo Maintainers: To accept this application, review their application or assign @CodePrincess360 to this issue.

[Buchi-Einstein]

@Buchi-Einstein has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Can I work on this please

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

[divicbold47]

@divicbold47 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Pls mintainer, lemme work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @divicbold47 to this issue.

[AlphaMaleBaDI]

@AlphaMaleBaDI has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi Maintainer, I will sove this by implementing an automated rule detecting improper ERC20 approval patterns inside the GasGuard analysis pipeline.

To deliver a pristine, 100% compliant security and static analysis enhancement matching all stated acceptance criteria, I plan to:

• Design a high-performance detection rule within the core analysis module (MDTechLabs/GasGuard) that flags code paths executing unconditional zero-value resets right before granting maximum allowance footprints.
• Track state mutations to intercept dangerous approve(spender, 0) followed immediately by approve(spender, uint256(-1)) flows, which are frequently prone to front-running race conditions or introduce unnecessary gas overhead.
• Optimize AST or bytecode traversal hooks to minimize false positives, safely isolating legitimate conditional patterns or modern increaseAllowance / decreaseAllowance alternative calls.
• Integrate comprehensive test vectors containing both vulnerable and secure contract snippets to guarantee full coverage, strict rule enforcement, and optimized pipeline execution.

Since my local workspace is perfectly calibrated for EVM security analysis, static code auditing structures, and testing suites, I can jump straight into the detection modules and submit a highly polished PR immediately. Ready to lock it in!

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

[bandanadivya]

@bandanadivya has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi
I’d like to work on this issue if it’s available. I’m a full-stack Web2 & Web3 developer with solid open-source experience and can start working on it right away.

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

[amberly-d]

@amberly-d has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

can i solve this?

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

[Caneryy]

@Caneryy has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hi maintainer, can I work on this issue?

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

[drips-wave]

Congratulations, @amberly-d! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @amberly-d: 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.

🌊 Happy Wave 🌊

[grantfox-oss]

🦊 GrantFox — @amberly-d has been assigned to this issue as part of the Official Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #344)
2. Your PR will be reviewed by the MDTechLabs maintainers

Good luck! Track your progress on GrantFox.