What Is Ethereum’s ‘Data Availability' Problem, and Why Does It Matter?

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What Is Ethereum’s ‘Data Availability' Problem, and Why Does It Matter?
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The latest plan to reduce congestion on Ethereum is creating “Data availability” layers – making it easier for rollups to verify that transactional details are available to download if needed, without actually downloading them, cryptauxmargaux reports

– likes to make is to a user who uploaded a photo to Google, and then wants to make sure the photo is actually there. The user queries Google, which responds with a fragment of the photo; the exercise is the confirmation; the user doesn't need to download the photo, just to make sure it's there.

“Celestia and DA layers will be the security and scaling backbone of the entire blockchain ecosystem,” White told CoinDesk. “They will provide the raw input for running all decentralized applications, namely secure, trust-minimized blockspace.”Ethereum developers have explored other ways in which they can address the issue of data on the blockchain. Concepts like sharding, which splits the blockchain into smaller pieces, allows for more space to process transactions and therefore lower gas fees.

“The reality is that rollups are now acknowledged to be the best way to do execution,” said Anurag Arjun, the co-founder of Avail, which will provide data availability to layer 2s. “Avail is really a base layer that only focuses on what is important to rollups, which is data availability.” “Your L1 data, fundamentally from just an architectural perspective, is going to be supreme. There's never going to be better data,” Karl Floersch CEO of OP Labs, the main developer of the layer-2 blockchain Optimism, told CoinDesk. “That doesn't mean, though, that all DA providers are not useful. They are useful because they can augment it and there’s a second class of data availability that you can use. They're not a replacement for L1 data, they can just help assist it.

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