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  1. Home
  2. /Glossary
  3. /Data Availability
Back to Glossary
blockchain

Data Availability

The guarantee that transaction data is published and accessible to anyone who needs to verify it.

Definition

The guarantee that transaction data is published and accessible to anyone who needs to verify it. It's a critical problem for rollups because they need to post data somewhere that's cheap but still verifiable. Solutions like Celestia and EigenDA specialize in providing cheap data availability layers.

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Related Terms

Rollup

A Layer 2 scaling solution that bundles many transactions together before posting them to the main chain.

Modular Blockchain

A blockchain design that separates core functions like execution, consensus, settlement, and data availability into specialized layers.

Blob Transactions

A new transaction type introduced with Ethereum's EIP-4844 upgrade that lets Layer 2s post data to Ethereum much more cheaply.

ABI

Application Binary Interface.

Account Abstraction

A way to make crypto wallets behave more like normal apps by turning every account into a smart contract.

Account Model

The way Ethereum and many other chains track balances.

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