weETH (L2)

Custom price feed for ether.fi Wrapped eETH on L2 chains.

Custom price feed for ether.fi Wrapped eETH on L2 chains. No direct weETH/USD feed exists, so the price is composed from a Chainlink weETH/eETH feed and a Chainlink ETH/USD feed, treating eETH ≈ ETH at 1:1.

Source: weETH_L2_CustomPriceFeed.sol

L2 feed. For the Ethereum mainnet feed, see weETH.

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Approach

Chainlink weETH/eETH × ETH/USD (eETH treated as 1:1 with ETH) — the ETH/USD term is read from the NAV's own primary feed via getPriceData(WETH), not a hardcoded oracle.

weETH (L2) price feed — how its oracle inputs compose into a USD price, with the staleness gate.

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

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Price calculation

price = (weETH/eETH) × (ETH/USD, NAV-selected) / 10^(weETH/eETH decimals)

Input	Source	Description
weETH/eETH	Chainlink weETH/eETH feed (latestRoundData)	weETH price in eETH (18 dec)
ETH/USD	NAV base — getPriceDataNoDivergence(WETH) (8 dec)	the NAV's primary WETH/USD price

The eETH/ETH peg is assumed to hold at 1:1; an eETH depeg would not be captured. The divisor is 10 ** weETHToEETH.decimals(). Output is 8 decimals (inherited from the ETH/USD feed).

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Constructor

constructor(
    address weEth_,
    address weEthToEethChainlink_,
    uint256 weEthToEethHeartbeat_,
    address nav_,
    address baseAsset_
)

Parameter	Description
weEth_	weETH token address (the supported underlying asset)
weEthToEethChainlink_	Chainlink weETH/eETH aggregator
weEthToEethHeartbeat_	Staleness window (seconds) for the weETH/eETH feed
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 = true if the weETH/eETH feed satisfies block.timestamp − updatedAt ≥ heartbeat, if its answer is ≤ 0, if its updatedAt is in the future (clamped to block.timestamp), or if the NAV reports the base asset (WETH) stale — all its feeds stale. The base leg's updatedAt now comes from the NAV's selected WETH feed. The reported updatedAt is the older of the two legs.

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Chains

Deployed on Arbitrum and Base. The Ethereum mainnet counterpart is weETH (Mainnet), which uses the weETH/eETH rate against an eETH/USD composition.