Historical retrospective · Layer 2
EIP-4844 created a temporary data lane for rollups
EIP-4844 introduced blob-carrying transactions that make rollup data available under a separate fee market and retention model.
The design targets a cheaper path for rollup data than ordinary calldata while avoiding a full sharding implementation in the same upgrade.
It was a major step in Ethereum’s rollup-centric roadmap and changed the cost base for L2 systems.
Blob capacity is finite and rollup fees still depend on demand, sequencer policy and the rollup’s own costs.
Primary source
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