Cross-Chain Price Oracle Integration

[grantfox-oss]

Priority: High
Category: Oracles

Description

Currently, price oracles are limited to a single chain. Extend the oracle system to support multi-chain price feeds across Ethereum, BSC, Polygon, and Arbitrum. Include support for multiple data sources (Chainlink, Band, Uniswap TWAP).

Definition of Done

• Multi-chain price feed adapters implemented
• Multiple data source aggregation for price validation
• Median price calculation from conflicting sources
• On-chain verification of submitted prices
• Alerting for price deviations >5% between sources

Acceptance Criteria

• Price feeds available for 5+ major blockchains
• Prices aggregated from at least 3 different sources
• Median price used as canonical source for all operations
• Price submitted to chain with signed attestations
• Alerts triggered for anomalous price movements
• Historical price data stored for 2 years
• API returns current and historical prices for all supported chains

---

[samsolo247]

Hi Maintainer,

I’m a smart contract and full-stack developer and would love to contribute to this issue. I’m an experienced contributor with hands-on expertise in Rust, Soroban, Cairo, and TypeScript.

I’m passionate about building secure, scalable blockchain solutions, with a strong emphasis on writing clean and maintainable code. Based on the scope of this issue, I’m confident I can deliver a complete solution within 24 hours of assignment.

I’d greatly appreciate the opportunity to contribute and help move this forward.

[A6dulmalik]

Description
Priority: High
Category: Oracles

Description
Currently, price oracles are limited to a single chain. Extend the oracle system to support multi-chain price feeds across Ethereum, BSC, Polygon, and Arbitrum. Include support for multiple data sources (Chainlink, Band, Uniswap TWAP).

Definition of Done
Multi-chain price feed adapters implemented
Multiple data source aggregation for price validation
Median price calculation from conflicting sources
On-chain verification of submitted prices
Alerting for price deviations >5% between sources
Acceptance Criteria
Price feeds available for 5+ major blockchains
Prices aggregated from at least 3 different sources
Median price used as canonical source for all operations
Price submitted to chain with signed attestations
Alerts triggered for anomalous price movements
Historical price data stored for 2 years
API returns current and historical prices for all supported chains

[grantfox-oss]

🦊 GrantFox — @A6dulmalik 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 #68)
2. Your PR will be reviewed by the SourceXXL maintainers

Good luck! Track your progress on GrantFox.

[grantfox-oss]

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

@A6dulmalik's PR #89 was approved and merged by @memplethee-lab.

🏆 @A6dulmalik: You earned 35 FoxPoints for this contribution! Your current tier: Explorer (506 total points). Track your full progress on GrantFox.

👏 Great work, @A6dulmalik! Keep contributing to SourceXXL.