Implement XLM donation support

[ayshadogo]

User Story:
As a donor, I want to donate in native XLM so that I don't need to hold stablecoins.
Acceptance Criteria:

• XLM handled via token::Client with native asset address
• Native XLM identified by AssetInfo { asset_code: "XLM", issuer: None }
• Correct token interface used for XLM transfers
• XLM amounts in stroops (7 decimal places) handled correctly

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[portableDD]

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

Can i work on this?

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

[playmaker410]

@playmaker410 has applied to work on this issue as part of the Stellar Wave Program's 5th wave.

Hi Maintainer,

I’d love to take this on. I have hands-on experience with Rust, Soroban, Cairo, and TypeScript, and I’m confident I can deliver a solid solution within 24 hours.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @playmaker410 to this issue.

[Emoji-dot]

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

I would like to work on this issue

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

[drips-wave]

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

🧑‍💻 @portableDD: 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

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