Definition

Data availability means that block data has been published and can be accessed by the participants who need to verify it.

Why it matters

If data is not available, users and systems cannot reliably verify state. In modular blockchain architecture, data availability is a core condition that lets other layers remain lighter and more specialized.

Validator context

Validators contribute to the continuity of the network that provides data availability. Their operational reliability therefore supports more than their own rewards; it supports the base layer other systems depend on.