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

Separate “data availability” layers could trim congestion connected the Ethereum web by making it easier for ancillary “rollup” networks to verify that transactional details beryllium and are disposable to download if needed — without really downloading them. The conception mightiness connection an alternate to Ethereum’s ain projected "danksharding" solution, seen arsenic years away.