[Contracts] Handle Cross-Chain Assets and Bridging Event Verification

[ONEONUORA]

Description

Implement support inside the Soroban smart contract to manage cross-chain deposits and payouts:

• Define storage schemas for tracking plan asset origins and source transaction hashes.
• Integrate validation to ensure bridged assets correspond to supported/wrapped tokens on Stellar.
• Implement payout rules that emit a bridge event upon plan claim if the beneficiary wants payout on a non-Stellar destination chain via Allbridge's messaging protocol.

Acceptance Criteria

• Smart contract accepts bridging tx hash metadata when creating a plan.
• Emits events detailing payout amounts, recipient addresses, and target blockchains.
• Safe integer division for bridge fee deductions.

[nonchalanttee22-lgtm]

@nonchalanttee22-lgtm has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

hello maintainer may i work on this issue?
ill submit PR within 1-3 days

ℹ️ Repo Maintainers: To accept this application, review their application or assign @nonchalanttee22-lgtm to this issue.

[drips-wave]

Congratulations, @nonchalanttee22-lgtm! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @nonchalanttee22-lgtm: 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.

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[grantfox-oss]

🦊 GrantFox — @nonchalanttee22-lgtm has been assigned to this issue as part of the Official Campaign campaign!

Next steps:

1. Open a Pull Request referencing this issue (e.g., Closes #849)
2. Your PR will be reviewed by the Fracverse maintainers

Good luck! Track your progress on GrantFox.

[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox!

@nonchalanttee22-lgtm's PR #908 was approved and merged by @ONEONUORA.

🏆 @nonchalanttee22-lgtm: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (118 total points). Track your full progress on GrantFox.

👏 Great work, @nonchalanttee22-lgtm! Keep contributing to Fracverse.