SFrxETHOracle

SFrxETHOracle is a special transparent-proxy oracle and does not inherit CorrelatedTokenOracle.

Checked block	Proxy	Implementation
25845949	0x5E06A5f48692E4Fff376fDfCA9E4C0183AAADCD1	0x93e19584359C6c5844f1f7E1621983418b5A892F

The v2.16.0 source fixes the Frax oracle and sfrxETH token in the implementation constructor:

constructor(address sfrxEthFraxOracle, address sfrxETH)

Proxy initialization and configuration are:

function initialize(
    address accessControlManager,
    uint256 maxAllowedPriceDifference
) external;

function setMaxAllowedPriceDifference(
    uint256 maxAllowedPriceDifference
) external;

The setter is ACM-controlled. At the checked block, maxAllowedPriceDifference() was 1.14e18 and accessControlManager() was 0x230058da2D23eb8836EC5DB7037ef7250c56E25E.

SFRXETH() and SFRXETH_FRAX_ORACLE() expose the implementation immutables. The proxy also exposes inherited owner, pendingOwner, transferOwnership, acceptOwnership, renounceOwnership, and owner-only setAccessControlManager functions.

getPrice(asset) accepts only the configured sfrxETH address. It obtains Frax’s low/high price pair, rejects bad or zero data, converts both values to USD, enforces the maximum high/low ratio, and returns their average.