Data availability, explained in a few sentences:
If a block producer publishes only the block header but withholds some transaction data, others cannot check whether the results are correct.
Rollup security depends on data availability: only when transaction data is public can anyone recompute the state, submit fraud proofs, or withdraw funds independently if the sequencer goes down.
When you see a chain claiming to offer “ultra-low costs,” first ask where its transaction data is stored and who guarantees it can be downloaded.
$TIA 0.5359 (+1.44%)
Personal notes, not operational advice.
If a block producer publishes only the block header but withholds some transaction data, others cannot check whether the results are correct.
Rollup security depends on data availability: only when transaction data is public can anyone recompute the state, submit fraud proofs, or withdraw funds independently if the sequencer goes down.
When you see a chain claiming to offer “ultra-low costs,” first ask where its transaction data is stored and who guarantees it can be downloaded.
$TIA 0.5359 (+1.44%)
Personal notes, not operational advice.