Advanced Concepts

Getting a Fresh Price
Since the Frax protocol only updates Frax Oracle prices once per day, the price may be up to 23 hours and 59 minutes old. If you need a fresher price, you can call addRoundData() on the Dual Oracle to write a fresh price, and then call latestRoundData() / getRoundData() / getPrice() on the Frax Oracle to retrieve the fresh price.
Smart Contract Design
L1 -> L2
Timelock Configuration
Controls all configuration for all Frax Oracles on L1: https://etherscan.io/address/0x8412ebf45bac1b340bbe8f318b928c466c4e39ca​
Controls all configuration for all Frax Oracles on Arbitrum:
​https://arbiscan.io/address/0xb426b13372b7c967c4a2371b5e95fc7dc37545db​
Attacks and Mitigations
Oracle manipulation attacks are handled economically. There is too much protocol owned liquidity for manipulating the Curve / Uniswap pools to be profitable.

Bounding prices ensures that frxEth/sfrxEth will never be overvalued and will never be undervalued by more than 30%. frxEth is fully backed with ETH in validators, so the only risk that exists with it is time duration risk.
Contract Addresses
L1
Dual Oracles / Price Sources
FrxEthEthDualOracle: https://etherscan.io/address/0xb12c19c838499e3447afd9e59274b1be56b1546a​
SfrxEthEthDualOracle: https://etherscan.io/address/0x1473F3e4d236CBBe3412b9f65B4c210756BE2C0E​
Frax Oracles
FrxEthFraxOracle: https://etherscan.io/address/0xc58f3385fbc1c8ad2c0c9a061d7c13b141d7a5df​
SfrxEthFraxOracle: https://etherscan.io/address/0xB9af7723CfBd4469A7E8aa60B93428D648Bda99d​
Crosschain
ArbitrumBlockHashRelay: https://etherscan.io/address/0x784906554d44d33c2764c86e8848a2bd71c2e3a7​
L2 (Arbitrum)
ArbitrumBlockHashProvider: https://arbiscan.io/address/0x240ff0894c584d39f992de5fdb603e03fc7e8a98​
StateRootOracle: https://arbiscan.io/address/0x11afa1d35f246fdc00d789e4a06f682b206f88c9​
Price Source
MerkleProofPriceSource: https://arbiscan.io/address/0xb032b46f835fa9e3d95d1e3f46fd307429505f9a​
Frax Oracles
FrxEthFraxOracle: https://arbiscan.io/address/0x3348e5d24a522dc70a319c03656391237fa2dd3e​
SfrxEthFraxOracle: https://arbiscan.io/address/0xe4f5d5eb9a3d51ff87c3fbd8eef03da9c6bcf1fc

Last modified 1mo ago