Ethereum’s Dencun Upgrade Achieves Key Milestone with Successful Activation on Sepolia Testnet

Milan Novakovic

Ethereum main

Ethereum’s Dencun Upgrade Advances with Successful Sepolia Testnet Deployment

Ethereum’s latest upgrade, Dencun, has reached a significant milestone with its successful deployment on the Sepolia testnet. This upgrade, primarily focused on integrating proto-danksharding and optimizing data blob storage, aims to expand network capacity and reduce transaction fees.

The Sepolia testnet smoothly adopted the new code changes during its transition to the Dencun upgrade, exhibiting no initial issues.

An Ethereum Foundation DevOps engineer celebrated this achievement on Twitter, praising the uneventful nature of the testnet forks:

“Smooth sailing in Sepolia with blobs. The best testnet forks are those without incidents!”

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Dencun Upgrade Undergoes Rigorous Testing

The road to Dencun’s successful activation in Sepolia was not without its hurdles, as evidenced by the bug encountered in the Prysm client during the Goerli testnet rehearsal on January 17, which caused a network split. However, this issue was promptly fixed by the developers a few hours after the fork began.

Before its final rollout on the Ethereum mainnet, the Dencun upgrade will undergo one last test on the Holesky testnet, scheduled for February 7th. The mainnet launch date is still to be decided, depending on the upgrade’s performance on these testnets.

Enhancing Ethereum’s Network and Scaling Solutions

The Dencun upgrade is a leap forward for Ethereum’s Layer 2 scaling solutions, targeting improvements in network storage and transaction cost efficiency. The introduction of proto-danksharding, or EIP-4844, paves the way for more secure support of scaling solutions such as rollups and sidechains by Ethereum.

Following the Shapella upgrade that enabled staked ETH withdrawals, Dencun is poised to be the most significant expansion of Ethereum’s core functionality since 2021. Its influence is expected to significantly impact data availability and lower fees for Layer 2 transactions.

Addressing Rising Costs on Layer 2 Networks

With the increased transaction costs on Layer 2 networks like Arbitrum, OP Mainnet, and Base following the Merge, Dencun’s role in easing these costs is crucial. The upgrade aims to substitute gas-intensive calldata with blobs, offering an effective solution to the high costs of on-chain data storage.

Carl Beekhuizen of the Ethereum Foundation underscored the importance of this upgrade in reducing on-chain data storage costs, a critical factor in enhancing scalability for Layer 2 transactions:

“Scaling to thousands of transactions means significant data storage costs on-chain. Danksharding and EIP-4844 aim to provide affordable data storage, enabling L2s to offer cost-effective transactions to users.”