Contract to get asset prices and manage price sources.

The source code is available on GitHub.

function setAssetSources(address[] calldata assets, address[] calldata sources) external override onlyAssetListingOrPoolAdmins

Sets the price sources for given list of assets.

function setFallbackOracle(address fallbackOracle) external override onlyAssetListingOrPoolAdmins

Sets/updates the fallbackOracle.

function getAssetPrice(address asset) public view override returns (uint256)

Returns the price of the supported asset in BASE_CURRENCY of the Aave Market in wei.

function getAssetsPrices(address[] calldata assets) external view override returns (uint256[] memory)

Returns a list of prices from a list of the supported assets addresses in BASE_CURRENCY of the Aave Market. All prices are in wei.

function getSourceOfAsset(address asset) external view override returns (address)

Returns the address of the price source for an asset address.

function getFallbackOracle() external view returns (address)

Returns the address of the fallback oracle.

The PriceOracleSentinel contract validates if the operations are allowed depending on the PriceOracle health.

This feature introduces a grace period for liquidations and disables borrowing under specific circumstances.

This feature has been specifically designed for L2s to handle eventual downtime of the sequencer (but can be extended to handle other cases, even on L1s, in the future).

Once the PriceOracle gets up after an outage or downtime, users can make their positions healthy during a grace period. The PriceOracle is considered healthy once its completely up and the grace period has passed.

The source code is available on GitHub.

function setSequencerOracle(address newSequencerOracle) external onlyPoolAdmin

Updates the address of the sequencer oracle.

This method can only be called by the Role Admin, specified by Aave Governance, responsible for managing the POOL_ADMIN role.

function setGracePeriod(uint256 newGracePeriod) public onlyRiskOrPoolAdmins

Updates the duration of the grace period.

function isBorrowAllowed() external view override returns (bool)

Returns true if the borrow operation is allowed. The operation is not allowed when PriceOracle is down or the grace period has not passed.

function isLiquidationAllowed() external view override returns (bool)

Returns true if the liquidation operation is allowed. The operation is not allowed when PriceOracle is down or the grace period has not passed.

function getSequencerOracle() external view returns (address)

Returns the SequencerOracle.

function getGracePeriod() external view returns (uint256)

Returns the grace period.