Contract: Implement Loan Collateral Top-Up Function in Lending Contract

[ONEONUORA]

📌 Target Component

contracts/lending-contract/src/lib.rs

📝 Description

Borrowers cannot add additional collateral to an existing loan position to lower LTV and avoid imminent liquidation.

📋 Implementation Requirements

1. Add deposit_additional_collateral(env: Env, loan_id: u64, amount: i128) function.
2. Recalculate health factor and emit collateral_added event.

🎯 Testnet Goal

Borrower risk management tools on testnet lending protocol.

[Abyy8]

@Abyy8 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi, I’d like to take this issue up. I’ve gone through the requirements and would be glad to implement the collateral top-up flow, including the health-factor update and event emission. Kindly assign it to me. Thank you.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Abyy8 to this issue.

[drips-wave]

Congratulations, @Abyy8! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on August 31, 2026.

🧑‍💻 @Abyy8: 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 🌊

[shadrach68]

@shadrach68 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hi maintainer, I am confident that I can resolve this issue before 24hrs if assigned to me because I have the technical expertise to resolve it.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @shadrach68 to this issue.

[omoniyiadebayo12goal-crypto]

@omoniyiadebayo12goal-crypto has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hello Maintainer,
I have carefully reviewed the issue description, acceptance criteria, and expected deliverables. I would appreciate the opportunity to contribute to this task.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @omoniyiadebayo12goal-crypto to this issue.

[johnbiliyaminu-bit]

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

I would love to work on this issue

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

[Ukorstack]

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

I’m ready to start, handle this issue efficiently and ensure the final PR meets the project standards.
within 2hrs.
Kindly assign it to me.

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

[bigayofe12]

@bigayofe12 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I would love to work on this issue

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[muizbolaji4]

@muizbolaji4 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

Hey let me fix this, got family to feed man

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[Steddy0]

@Steddy0 has applied to work on this issue as part of the Stellar Wave Program's 8th wave.

I can fix this ASAP

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Steddy0 to this issue.

[Johnsource-hub]

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

Hi, kindly assign task. I’m confident I can take ownership of this task and deliver a well-tested solution that meets your expectations.

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

[simonpeters298]

@simonpeters298 has applied to work on this issue as part of the Stellar Wave Program's 9th wave.

Hi Maintainer! I'd like to work on this issue. I'm confident I can complete this task and submit a PR within 24 hours.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @simonpeters298 to this issue.