What Is the "Data Availability Problem" in L2 Scaling? ▴ Learn

What Is the “Data Availability Problem” in L2 Scaling?

The Data Availability (DA) Problem is the challenge of ensuring that all the data required to verify the correctness of a Layer 2 (L2) transaction batch is published to the Layer 1 (L1) blockchain. If the L2 operator withholds this data, users cannot reconstruct the L2 state or submit fraud proofs, compromising the security of the L2.

L2s must post data to L1 to solve this.

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