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How Celestia can provide off-chain data availability for Ethereum L2s

Celestia serving as off-chain DA for Ethereum rollups 🧵 The main reliance that rollups have on L1 is the cost of calldata and its data throughput. While Ethereum is in the process of implementing its sharding solution, rollups should have a source of cheap data…

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The Ethereum data availability landscape

The Ethereum data availability landscape 🧵 With the rapid growth of L2s, a spectrum of data availability solutions have emerged ranging from off-chain to on-chain DA layers. How do the cost and security tradeoffs of different DA solutions compare? https://blog.celestia.org/ethereum-off-chain-data-availability-landscape/

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An intro to cross-chain communication

Sovereignty and communication between chains 🧵 Blockchains that are sovereign have freedom to choose their preferred execution environment. A sovereign blockchain on Celestia has no restrictions imposed on it, giving it the ability to upgrade or fork if necessary.

Ultimately a sovereign chain can make changes in accordance with its own social consensus, independent of Celestia or any other chain. As such, these blockchains on Celestia are flexible in design possibilities. They can be composable shared environments for many applications…

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Best quotes from the shared security space with Zaki Manian

Discussion on shared security featuring @zmanian, @musalbas and @jadler0 happening now! Read the thread for tweets from the livestream 👇 https://twitter.com/i/spaces/1OdKrBbAXnAKX

"Blockchain security comes down to the question 'who can rug you?' How many actors need to collude to attack the system?" -@zmanian

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The benefits of modular blockchains

The benefits of modular blockchains 🧵 Modular blockchains are the result of separating the core components of a single blockchain and running them on separate layers. Here’s what makes them powerful 👇

Scalability Layers that specialize on a couple of core components allows for greater scalability innovations without the burden of making tradeoffs that come with a modular blockchain. For example, a modular DA layer with DA sampling can scale linearly with the number of users.

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Celestia and the data availability problem

How does Celestia solve the data availability problem? 🧵 The data availability problem is concerned with whether data in the most recent block is hidden or available. This is important because by hiding block data, rollup operators can commit fraud or steal funds.

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The future of bridging in a multi-chain ecosystem

The multi-chain future is likely one that encompasses the idea of sovereign “clusters” of blockchains that can bridge to each other in a trust-minimized way. Trust-minimized bridging is facilitated by the chains sharing security with a common data layer like Celestia. https://twitter.com/VitalikButerin/status/1479501366192132099

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How Celestia light nodes work

Celestia light nodes 🧵 Why they’re more secure than typical light clients and how they help to scale and secure the network. Light clients are important in a blockchain network to allow individuals to participate as a non-consensus node without the overhead of full nodes.

Light clients typically only download block headers, and don’t verify transactions themselves. This gives them weak security guarantees compared to full nodes as they rely on an honest majority assumption and assume the chain is valid by default.

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