Implement SEP-24 withdrawal flow in anchor-service

[MissBlue00]

Task

Add SEP-24 interactive withdrawal flow methods to anchor-service.

Details

• createSep24Withdrawal(assetCode, amount, accountId) initiates withdrawal
• Return interactive URL for user to complete on anchor
• Add pollSep24WithdrawalStatus(id) to check completion
• Add Sep24WithdrawalResponse interface

Path

• packages/anchor-service/src/anchor.service.ts
• packages/anchor-service/src/interfaces/

Test

Run pnpm --filter @stellar-pay/anchor-service build to verify.

[AlonsoFi]

@AlonsoFi has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi! I'd love to work on this issue, please consider assigning it to me 🙏

Plan:

• Implement createSep24Withdrawal returning the interactive URL and pollSep24WithdrawalStatus in anchor.service.ts
• Add Sep24WithdrawalResponse interface
• Verify with pnpm --filter @stellar-pay/anchor-service build

Thank you!

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

[supremeproton02]

@supremeproton02 has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi maintainer, can i be assigned to this?

ℹ️ Repo Maintainers: To accept this application, review their application or assign @supremeproton02 to this issue.

[drips-wave]

Congratulations, @supremeproton02! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

🧑‍💻 @supremeproton02: 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.

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[drips-wave]

This issue has been completed by @supremeproton02 as part of the Stellar Wave Program's 7th Wave 🥳

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