This interface allows contracts to query unverified prices.

isIdentifierSupported(bytes32 identifier) → bool isSupported external

Whether this PriceFeeds provides prices for the given identifier.

latestPrice(bytes32 identifier) → uint256 publishTime, int256 price external

Gets the latest time-price pair at which a price was published.

Will revert if no prices have been published for this identifier.

PriceUpdated(bytes32 identifier, uint256 time, int256 price) event

An event fired when a price is published.

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