EIP-4844 Dencun Upgrade event

Event · PageRank 0.0045

Overview

The Dencun upgrade activated on Ethereum mainnet at epoch 269568 on March 13, 2024 at 13:55 UTC. Its headline change was EIP-4844, known as proto-danksharding, which introduced blob-carrying transactions: a new, cheaper form of data storage in which layer-2 rollups post data as blobs to the consensus layer where it is retained temporarily, rather than permanently on the execution layer. Each transaction could initially carry up to four blobs of 128 KB each. The upgrade was expected to cut layer-2 transaction fees by at least an order of magnitude and is regarded as a foundational step in Ethereum's rollup-centric scaling roadmap.

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Frequently asked questions

When did the Dencun upgrade go live?

On Ethereum mainnet at epoch 269568, on March 13, 2024 at 13:55 UTC.

What does EIP-4844 change?

It introduces blob-carrying transactions, letting rollups post data as temporary blobs to the consensus layer instead of writing it permanently to layer 1, with an initial limit of up to four 128 KB blobs per transaction.

What was the expected impact?

A substantial reduction in layer-2 transaction fees — commonly cited as at least a tenfold decrease — and improved network scalability for rollups.