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FluidOracleL2 ​

Git Source

Inherits:IFluidOracle, OracleError

Base contract that any Fluid Oracle L2 must implement

State Variables ​

_SEQUENCER_ORACLE ​

Chainlink L2 Sequencer Uptime feed to detect sequencer outages

solidity
IChainlinkAggregatorV3 internal immutable _SEQUENCER_ORACLE;

_SEQUENCER_MAX_GRACE_PERIOD ​

max time period until oracle assumes normal behavior after a sequencer outage.

solidity
uint256 internal constant _SEQUENCER_MAX_GRACE_PERIOD = 45 minutes;

Functions ​

constructor ​

sets the L2 sequencer uptime Chainlink feed

solidity
constructor(address sequencerUptimeFeed_);

sequencerL2Data ​

returns all sequencer uptime feed related data

solidity
function sequencerL2Data()
    public
    view
    returns (
        address sequencerUptimeFeed_,
        uint256 maxGracePeriod_,
        bool isSequencerUp_,
        uint256 lastUptimeStartedAt_,
        uint256 gracePeriod_,
        bool gracePeriodPassed_,
        uint256 lastOutageStartedAt_,
        bool isSequencerUpAndValid_
    );

_ensureSequencerUpAndValid ​

ensures that the sequencer is up and grace period has passed

solidity
function _ensureSequencerUpAndValid() internal view;

getExchangeRate ​

Deprecated. Use getExchangeRateOperate() and getExchangeRateLiquidate() instead. Only implemented for backwards compatibility.

solidity
function getExchangeRate() external view virtual returns (uint256 exchangeRate_);

getExchangeRateOperate ​

Get the exchangeRate_ between the underlying asset and the peg asset in 1e27 for operates

solidity
function getExchangeRateOperate() external view virtual returns (uint256 exchangeRate_);

getExchangeRateLiquidate ​

Get the exchangeRate_ between the underlying asset and the peg asset in 1e27 for liquidations

solidity
function getExchangeRateLiquidate() external view virtual returns (uint256 exchangeRate_);

_lastSequencerOutageStart ​

finds last round before uptimeStartRoundId_ where sequencer status was down, incl. handling cases of consecutive rounds where status was down.

solidity
function _lastSequencerOutageStart(uint80 uptimeStartRoundId_) private view returns (uint256 outageStartedAt_);

_sequencerUpStatus ​

finds last round where sequencer status was up, incl. handling cases of consecutive rounds where status was up.

solidity
function _sequencerUpStatus()
    private
    view
    returns (bool isSequencerUp_, uint80 uptimeStartRoundId_, uint256 uptimeStartedAt_);

_gracePeriod ​

returns the gracePeriod_ duration and if the grace period has passed_ based on current uptime round data vs the last sequencer outage duration.

solidity
function _gracePeriod(uint80 uptimeStartRoundId_, uint256 uptimeStartedAt_)
    private
    view
    returns (uint256 gracePeriod_, bool passed_, uint256 outageStartedAt_);