rsETH (L2)

Custom price feed for Kelp DAO rsETH on L2 chains.

Custom price feed for Kelp DAO rsETH on L2 chains. No direct rsETH/USD feed exists, so the price is composed from a Chainlink rsETH/ETH feed and the NAV's primary ETH/USD price.

Source: rsETH_L2_CustomPriceFeed.sol

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

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Approach

Chainlink rsETH/ETH × NAV primary ETH/USD

rsETH (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 = (rsETH/ETH) × (ETH/USD) / 10^(rsETH/ETH decimals)

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

The rsETH/ETH leg is a Chainlink feed; the ETH/USD leg comes from the NAV's primary feed. The divisor is 10 ** rsETHToETH.decimals(). Output is 8 decimals (inherited from the ETH/USD term).

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Constructor

constructor(
    address rsEth_,
    address rsEthToEthChainlink_,
    uint256 rsEthToEthHeartbeat_,
    address nav_,
    address baseAsset_
)

Parameter	Description
rsEth_	rsETH token address (the supported underlying asset)
rsEthToEthChainlink_	Chainlink rsETH/ETH aggregator
rsEthToEthHeartbeat_	Staleness window (seconds) for the rsETH/ETH 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

The rsETH/ETH Chainlink heartbeat is checked. getLatestPrice() returns stale = true if the rsETH/ETH feed satisfies block.timestamp − updatedAt ≥ heartbeat, if its answer is ≤ 0, or 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 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. The Ethereum mainnet counterpart is rsETH (Mainnet), which uses a rate provider against ETH/USD.