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LinksENS LabsSIWECCIP-ReadSitemapCCIP-Read / EIP-3668
CCIP-Read allows for offchain (including Layer 2) lookups of data in a way that is transparent to clients and provides contract authors to implement whatever validation is necessary
EIP-3668
The technical specification for CCIP-Read is set out in Ethereum Improvement Proposal (EIP) 3668. View EIP-3668 here.

Explainer
For a technical explainer of how CCIP-Read works, and the problem statement that was solved, watch this video of Nick.eth on Ethereum Cat Herders Youtube channel.
