Data Availability
Making sure transaction data can be accessed by anyone who needs to verify it. A key challenge for scaling blockchains cheaply.
Example
Rollups posting data to Ethereum so anyone can check the transactions are valid, even if they don't run a full node.
Related Terms
Advanced Concepts
⚙️How It Works
- 1
Transaction Data
L2s need to store transaction data somewhere accessible
- 2
DA Layer
Data is posted to Ethereum, Celestia, or another DA layer
- 3
Verification
Anyone can download and verify the data is correct
- 4
Fraud Detection
Invalid transactions can be challenged and proven wrong
📊Key Numbers
10-20x
EIP-4844 Savings
cheaper L2 fees with blobs
128 KB
Blob Size
per blob transaction