EIP 4844 uses KZG commitments to commit to this data so that it is like we have a proof much like you could use local trees for state and traditional blockchains or Ethereum right now. And then later on, if anything goes wrong with the rollup, the rollup can prove things about this data. So these blobs make this data available to everyone. The idea behind proto-dank sharding, also known as EIP 4844, is that we have a bunch of data next to the ETH chain that is broken up into blobs. But from the chain's perspective, we don't really know what's in them. It's just an arbitrary amount of

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