FRAX ABI & Token Addresses
Modified ERC-20 Contract representing the FRAX stablecoin.
Deployments
Arbitrum
0x17FC002b466eEc40DaE837Fc4bE5c67993ddBd6F
Aurora
0xE4B9e004389d91e4134a28F19BD833cBA1d994B6
Avalanche
0xD24C2Ad096400B6FBcd2ad8B24E7acBc21A1da64
Base (LayerZero)
0x909DBdE1eBE906Af95660033e478D59EFe831fED
Blast (LayerZero)
0x909DBdE1eBE906Af95660033e478D59EFe831fED
Boba
0x7562F525106F5d54E891e005867Bf489B5988CD9
BSC
0x90C97F71E18723b0Cf0dfa30ee176Ab653E89F40
Ethereum (native)
Ethereum (LayerZero)
0x909DBdE1eBE906Af95660033e478D59EFe831fED
Evmos
0xE03494D0033687543a80c9B1ca7D6237F2EA8BD8
Fantom
0xdc301622e621166BD8E82f2cA0A26c13Ad0BE355
Fraxtal (Native)
Fraxtal (LayerZero)
0x80eede496655fb9047dd39d9f418d5483ed600df
Harmony
0xFa7191D292d5633f702B0bd7E3E3BcCC0e633200
Linea (Axelar)
0x406cde76a3fd20e48bc1e0f60651e60ae204b040
Mantle (Axelar)
0x406Cde76a3fD20e48bc1E0F60651e60Ae204B040
Metis (LayerZero)
0x909DBdE1eBE906Af95660033e478D59EFe831fED
Mode (LayerZero)
0x80eede496655fb9047dd39d9f418d5483ed600df
Moonbeam
0x322E86852e492a7Ee17f28a78c663da38FB33bfb
Moonriver
0x1A93B23281CC1CDE4C4741353F3064709A16197d
Optimism
0x2E3D870790dC77A83DD1d18184Acc7439A53f475
Polygon
0x45c32fA6DF82ead1e2EF74d17b76547EDdFaFF89
Sei (LayerZero)
0x80eede496655fb9047dd39d9f418d5483ed600df
Scroll (Axelar)
0x406cde76a3fd20e48bc1e0f60651e60ae204b040
Solana
FR87nWEUxVgerFGhZM8Y4AggKGLnaXswr1Pd8wZ4kZcp
TRON
TBD
X-Layer (LayerZero)
0x80eede496655fb9047dd39d9f418d5483ed600df
State Variables
ERC-20 (Inherited)
https://docs.openzeppelin.com/contracts/2.x/api/token/erc20#ERC20
AccessControl (Inherited)
https://docs.openzeppelin.com/contracts/3.x/api/access#AccessControl NOTE: FRAX & FXS contracts have no pause or blacklist controls in any way (including system contracts).
FRAX-Specific
An enum declaring FRAX and FXS. Used with oracles.
Instance for the Chainlink ETH / USD trading. Combined with FRAX / WETH, FXS / WETH, collateral / FRAX, and collateral / FXS trading pairs, can be used to calculate FRAX/FXS/Collateral prices in USD.
Decimals for the Chainlink ETH / USD trading pair price.
Instance for the FRAX / WETH Uniswap pair price oracle.
Instance for the FXS / WETH Uniswap pair price oracle.
Array of owner address, who have privileged actions.
Address of the governance contract.
Address of the contract creator.
Address of the timelock contract.
Address of the FXS contract
Address for the fraxEthOracle .
Address for the fxsEthOracle .
Address for the canonical wrapped-Ethereum (WETH) contract. Should be 0xc02aaa39b223fe8d0a0e5c4f27ead9083c756cc2 for the mainnet.
Address for the ChainlinkETHUSDPriceConsumer .
Genesis supply of FRAX. Should be a small nonzero amount. Most of the FRAX supply will come from minting, but a small amount is needed initially to prevent divide-by-zero errors in various functions.
Array of all the FraxPool contract addresses.
Essentially the same as frax_pools_array , but in mapping form. Useful for gas savings in various functions like globalCollateralValue() .
The current ratio of FRAX to collateral, over all FraxPool s.
The fee for redeeming FRAX for FXS and/or collateral. Also the fee for buying back excess collateral with FXS. See the FraxPool contract for usage.
The fee for minting FRAX from FXS and/or collateral. See the FraxPool contract for usage.
Set in the constructor. Used in AccessControl .
A constant used in the pausing of the collateral ratio.
Whether or not the collateral ratio is paused.
View Functions
oracle_price
Get the FRAX or FXS price, in USD.
frax_price
Returns the price for FRAX from the FRAX-ETH Chainlink price oracle.
fxs_price
Returns the price for FXS from the FXS-ETH Chainlink price oracle.
frax_info
Returns some commonly-used state variables and computed values. This is needed to avoid costly repeat calls to different getter functions. It is cheaper gas-wise to just dump everything and only use some of the info.
globalCollateralValue
Iterate through all FRAX pools and calculate all value of collateral in all pools globally. This uses the oracle price of each collateral.
Public Functions
refreshCollateralRatio
This function checks the price of FRAX and refreshes the collateral ratio if the price is not $1. If the price is above $1, then the ratio is lowered by .5%. If the price is below $1, then the ratio is increased by .5%. Anyone can poke this function to change the ratio. This function can only be called once every hour.
Restricted Functions
mint
Public implementation of internal _mint().
pool_burn_from
Used by pools when user redeems.
pool_mint
This function is what other frax pools will call to mint new FRAX.
addPool
Adds collateral addresses supported, such as tether and busd, must be ERC20.
removePool
Remove a pool.
setOwner
Sets the admin of the contract
setFraxStep
Sets the amount that the collateral ratio will change by upon an execution of refreshCollateralRatio(),
setPriceTarget
Set the price target to be used for refreshCollateralRatio() (does not affect minting/redeeming).
setRefreshCooldown
Set refresh cooldown for refreshCollateralRatio().
setRedemptionFee
Set the redemption fee.
setMintingFee
Set the minting fee.
setFXSAddress
Set the FXS address.
setETHUSDOracle
Set the ETH / USD oracle address.
setFRAXEthOracle
Sets the FRAX / ETH Uniswap oracle address
setFXSEthOracle
Sets the FXS / ETH Uniswap oracle address
toggleCollateralRatio
Toggle pausing / unpausing the collateral ratio.
Events
FRAXBurned
Emitted when FRAX is burned, usually from a redemption by the pool.
Modifiers
onlyCollateralRatioPauser
Restrict actions to the designated collateral ratio pauser.
onlyPools
Restrict actions to pool contracts, e.g. minting new FRAX.
onlyByGovernance
Restrict actions to the governance contract, e.g. setting the minting and redemption fees, as well as the oracle and pool addresses.
onlyByOwnerOrGovernance
Restrict actions to the governance contract or owner account(s), e.g. setting the minting and redemption fees, as well as the oracle and pool addresses.
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