weETH

weETH is Ether.fi's non-rebasing wrapped eETH.

weETH is Ether.fi's non-rebasing wrapped eETH. It is priced purely from its on-chain exchange rate — no market oracle sits in the pricing path. This ICustomPriceFeed adapter reads the weETH contract's getRate() and scales it by the NAV's own ETH/USD. Any market divergence is surfaced by a market monitor feed, not by moving this price.

Source: weETH_CustomPriceFeed.sol

Mainnet feed. The L2 deployments use a different oracle composition — see weETH (L2).

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Approach

getRate() × ETH/USD — getRate() gives eETH per weETH, which is ETH per weETH when treating eETH/ETH ≡ 1.0 (eETH is a ~1:1 rebasing claim on staked ETH); ETH/USD then converts to USD. This is a pure-fundamental BaseCustomPriceFeed subclass: it implements only the _rate() hook and carries no market weETH/ETH Chainlink leg. The ETH/USD term is the NAV's own price for WETH (via getPriceDataNoDivergence(WETH)), not a hardcoded oracle.

weETH (Mainnet) price feed — the on-chain exchange rate scaled by the NAV's ETH/USD, with the staleness gate.

The ETH/USD term is sourced from the NAV's own primary feed — see Base/USD from the NAV's own selector.

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Price calculation

price = getRate() (18) × (ETH/USD, NAV-selected) (8) / 1e18      // USD, 8 dec

Input	Source	Description
getRate	IweETH.getRate() on weETH (18 dec)	eETH per 1 weETH
ETH/USD	NAV — getPriceDataNoDivergence(WETH) (8 dec)	the NAV's primary WETH/USD price

getRate() is the weETH contract's authoritative eETH-per-weETH conversion; since 1 eETH ≈ 1 ETH, it doubles as ETH per weETH. A real depeg does not move this price but instead trips the divergence monitor (below). Output decimals are inherited from the ETH/USD feed (8).

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Constructor

constructor(
    address weEth_,
    address nav_,
    address baseAsset_
)

Parameter	Description
weEth_	weETH token address (also the supported underlying; used for getRate())
nav_	NAVCalculator (proxy) — supplies the base asset's USD price via getPriceDataNoDivergence
baseAsset_	the registered base asset whose USD price is read (WETH)

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Staleness

getLatestPrice() returns stale if getRate() returns 0, or if the NAV reports the base asset (WETH) primary feed stale. There is no market-leg heartbeat — the rate call has no independent heartbeat, and the only external timestamp is the NAV's selected WETH feed, which supplies the reported updatedAt.

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Divergence monitors

weETH carries a divergence tolerance of 250 bps and is watched by a Redstone weETH/USD market monitor feed. If the primary deviates from the monitor beyond 250 bps the asset is flagged irregular (a signal, not a price change). See Primary feed and divergence monitors.

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Chains

Deployed on Ethereum. The L2 variant instead reads a Chainlink weETH/eETH exchange-rate feed, since weETH is bridged there and has no on-chain rate — see weETH (L2).