Soroban: Implement decentralized oracle integration for local fiat rates

[sublime247]

Difficulty: Hard
Skills: Rust, Soroban oracles, decentralized finance
Files: contracts/oracle/src/lib.rs, contracts/oracle/Cargo.toml

Description:
Design and implement smart contract endpoints pulling dynamic exchange rates from on-chain oracle pools to prevent pricing arbitrage.

Acceptance Criteria:

• Implement client call methods reading from oracle contract fields.
• Configure dynamic rate calculations in smart contracts.
• Validate pricing spreads prevent arbitrage.

Questions? Comment below!

[EmeditWeb]

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

Hi maintainer, I can fix the issue right now

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

[drips-wave]

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

🧑‍💻 @EmeditWeb: 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 marked as completed by a Drips Wave moderator for @EmeditWeb as part of the Stellar Wave Program's 7th Wave 🥳

Moderator's reason: [Auto-assessed] The PR was merged on 2026-07-26T22:53:52Z, successfully implementing the requested Soroban oracle contract and spread validation. While a maintainer previously requested a CI fix, the subsequent merge serves as the definitive signal of acceptance, and per the rules, CI failures are disregarded for merged PRs.

😎 @EmeditWeb: You earned 200 Points for completing this issue! After the current Wave ends, you'll be eligible for a percentage of the Wave's reward pool based on the percentage of total points you've earned. Learn more here.

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ℹ️ Note: This issue was marked complete via moderation. Points were issued even though the GitHub issue remains open.