# Oracles

Every USD value Chamber reports — vault NAV, share price, deposit size, performance-fee threshold — comes from an oracle. Chamber uses a mix of **Chainlink**, **Pyth**, and **TWAP** (time-weighted average price) feeds, chosen per asset at the protocol level. Chamber does not run its own price feeds; it reads established third-party oracles.

## Feed types

* **Chainlink** — the default for blue-chip assets and standard USD pairs.
* **Pyth** — used where Chainlink doesn't have coverage, or where a different update profile suits the asset.
* **TWAP** — time-weighted average price derived onchain from trading activity on supported venues. Used for assets without a reliable Chainlink or Pyth feed.

Each supported asset has its feed configured at the **protocol level**, not by individual vault managers. Every vault holding asset X on chain Y uses the same feed.

## Oracle risk

Oracles are external dependencies. The main risks:

* **Staleness** — a feed stops updating. Chamber contracts check staleness thresholds and revert rather than operate on stale prices. Deposits, withdrawals, and trades involving the affected asset will fail until the feed recovers.
* **Manipulation** — theoretically possible on illiquid pairs. TWAP feeds resist single-block manipulation by averaging over a time window. Feed selection favours assets with deep liquidity.

## Related

* [NAV and accounting](/concepts/nav-accounting.md) — how oracle prices feed into NAV
* [Denomination asset](/manage/denomination-asset.md) — why Chamber reports everything in USD
* [Risks](/deposit/risks.md) — depositor-side view of oracle risk


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