Add `escrow.fund()` wrapper

[meshackyaro]

Description

This issue aims to address the implementation of Add escrow.fund() wrapper.

The core objective is to: Handle the necessary Stellar Asset transfers and contract invocations to lock USDC.

By completing this feature, we will ensure that the TrustFlow protocol maintains its high standards for security, usability, and decentralized logic. This issue requires careful attention to the SDK Wrapper architecture and adherence to the existing project conventions.

When picking up this issue, please ensure you document any new dependencies or architectural decisions made during development.

Component

SDK Wrapper

Difficulty

🟡 Medium

Tasks

• Review existing Typescript abstract classes
• Implement SDK method for: Add escrow.fund() wrapper
• Ensure Tsup successfully exports to ESM and CJS
• Update typedoc comments for the new feature
• Write Jest tests validating XDR payloads
• Run npm run build to verify standard bundling

Acceptance Criteria

• Feature accurately implements the objective: Handle the necessary Stellar Asset transfers and contract invocations to lock USDC.
• Any PR that introduces TypeScript errors is automatically blocked
• CI pipeline runs in under 3 minutes per PR
• Code is properly reviewed and approved by codeowners

Estimated Time

4-8 hours

[CillaSam]

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

Hi, I'd like to work on this. I am familiar with the code base and can deliver this ASAP

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

[drips-wave]

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

🧑‍💻 @CillaSam: 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]

🎉 This issue has been marked as completed on GrantFox as part of the Third Campaign campaign!

@CillaSam's PR #93 was approved and merged by @meshackyaro.

🏆 @CillaSam: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (121 total points). Track your full progress on GrantFox.

👏 Great work, @CillaSam! Keep contributing to trustflow-protocol.