🔧 Add maximum plan limit per merchant

[Smartdevs17]

Problem

No limit on number of plans a merchant can create.

Context

Unlimited plans could cause storage issues and degrade UX.

Proposed Solution

Add plan limits:

1. Define MAX_PLANS_PER_MERCHANT constant
2. Check limit before creating plan
3. Return error if exceeded
4. Consider configurable limits

Acceptance Criteria

• Limit enforced on contract
• Clear error when limit reached
• Admin can update limit
• Existing plans unaffected

Technical Notes

File: contracts/src/lib.rs
Constant: Add to top of file
Function: create_plan

Constraints

• Consider gas for iteration
• Upgrade path for limits
• Backward compatibility

[drips-wave]

This issue has been added to the Stellar Wave Program and is worth 150 Points.

🧑‍💻 Interested in contributing? Apply to work on this issue on Drips Wave, earn points, and receive rewards.

Warning

Only applications submitted via the apply link above will be considered. Please do not apply by commenting on the issue or opening a PR directly.

🤠 Repo maintainers: You can manage this issue's Points and Complexity on your Maintainer Dashboard here. Please keep an eye on applications and respond quickly 💙

ℹ️ Learn more about Drips Wave

[patopatrish]

@patopatrish has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

Hey maintainer can i work on this?

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

[morelucks]

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

I'd love to work on this

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

[manueldezman]

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

Dear @Smartdevs17,

As a Soroban Smart Contract Engineer, I know that enforcing strict storage boundaries and optimization limits is critical for protocol predictability and gas management, and I would like to request that you assign this issue to me.

I am ready to implement this merchant limit safeguard inside contracts/src/lib.rs according to your constraints:

• Storage Guard & Validation: I will define the MAX_PLANS_PER_MERCHANT constant and inject a deterministic check inside create_plan to immediately return a descriptive error if the cap is violated.
• Configurable Admin Overrides: I will design an isolated, gas-efficient admin update path to modify limits dynamically without breaking backward compatibility for older, existing plans.
• Gas-Conscious Architecture: I will structured the storage layouts to prevent unbounded iteration, keeping read/write footprints constant and safe from gas degradation.

Please assign this issue to me, and I will begin the smart contract implementation immediately.

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

[Samaro1]

@Samaro1 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Gm gm boss, I would love to work on this issue. A satisfactory PR will be raised in 8 hours tops

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Samaro1 to this issue.

[drips-wave]

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

🧑‍💻 @manueldezman: 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 🌊