Concepts
Freshness, sequence and safety
How the oracle rejects stale, replayed, future dated and outlier updates.
Concepts
How prices are signed, agreed and kept fresh.
1 min read 6 sections Testnet
Freshness limits
Pass your own maxAgeSeconds. Fresh reads revert when the data is older than that limit.
Forward only rounds
Each accepted report increases the round. An update for an older or equal round is rejected.
Replay protection
A signed update cannot be submitted twice. Old signatures cannot roll a price back.
Future dated updates
Updates stamped later than the current block time are rejected.
Circuit breaker
A jump against the stored price is bounded. Updates outside the bound are refused.
Guardian pause
Warning
The guardian can pause a feed. Reads from a paused feed should be treated as unavailable. Check isPaused(feedId).
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