Implement subscription smart contract oracle integration for price feeds

[Smartdevs17]

Implement subscription smart contract oracle integration for price feeds

Description

Context: Subscription prices in crypto need accurate price feeds for proper charging amounts in stablecoin equivalent.

Current Limitation: No oracle integration for price feeds; uses static or mock prices.

Expected Outcome: Implement oracle integration for real-time price feeds enabling accurate USD-equivalent charging.

Acceptance Criteria

• Integrate with price oracle (e.g., Chainlink, Band Protocol)
• Implement price caching with TTL
• Add fallback oracle support for redundancy
• Implement circuit breaker for oracle failures
• Add price staleness detection
• Support multiple quote currencies
• Implement price deviation thresholds for alerts
• Write tests for oracle integration

Technical Scope

Files Likely Affected:

• contracts/oracle/src/lib.rs - New oracle module
• contracts/oracle/src/price.rs - Price fetching
• app/services/priceService.ts - Price service

APIs/Contracts Involved:

• get_price(token: TokenId) -> Price
• get_price_with_cache(token: TokenId, ttl: u64) -> Price
• get_historical_price(token: TokenId, timestamp: Timestamp) -> Price

Edge Cases to Consider:

• Oracle downtime
• Price manipulation
• Stale prices
• Network latency

[lemarjohnny781]

@lemarjohnny781 has applied to work on this issue as part of the Stellar Wave Program's 4th wave.

please sir/maam i would like to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @lemarjohnny781 to this issue.