If you are using Chainlink Data Feeds on L2 networks like Arbitrum, Optimism, and Metis, you must also check the latest answer from the L2 Sequencer Uptime Feed to ensure that the data is accurate in the event of an L2 sequencer outage
OracleLib.sol not check the latest answer from the L2 Sequencer Uptime Feed
If Chainlink returns old or zero data, the user's collateral will be liquidated prematurely
manual
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