Ethereum

Orbit

Arbitrum

Atlas

Reported by The Block, Offchain Labs, the core contributor to Arbitrum, has implemented the Dencun upgrade within the Arbitrum ecosystem through the ArbOS 20 upgrade, known as “Atlas.”
The purpose of the Atlas upgrade on Arbitrum is to reduce Ethereum Layer 2 transaction costs by integrating the blob transactions feature, which became available following the recent <a rel="noopener noreferrer nofollow" target="_blank" href="https://www.theblock.co/post/282236/ethereum-dencun-upgrade-blobs">Dencun launch</a>. This was implemented following a governance approval from Arbitrum DAO
The Dencun upgrade introduced yesterday has equipped Layer 2 networks with a novel transaction type known as blobs. These blobs create a new method for chains to store information on Ethereum, moving away from the conventional “calldata” approach, and paving the way for significant reductions in transaction fees for Layer 2 networks including Arbitrum.
To integrate blobs, Layer 2 chains themselves must carry out software updates, and Arbitrum is the latest network to do so.
Layer 2 networks like Optimism, Base, and Starknet, which implemented blob transactions immediately after Dencun have already <a rel="noopener noreferrer nofollow" target="_blank" href="https://www.theblock.co/post/282417/ethereum-layer-2s-show-dramatic-drop-in-transaction-fees-after-dencun">seen significant reductions</a> in their average transaction fees.
For Arbitrum, Offchain Labs anticipates a reduction in the network’s minimum base fee from 0.1 gwei to 0.01 gwei, marking a decrease by a factor of ten. Previously at $0.5, Arbitrum’s average transaction fee could potentially decrease to about $0.05 following the Atlas upgrade.
Offchain Labs stated that several service providers, including Altlayer, Caldera, Conduit, and Gelato, which focus on Arbitrum, will assist in the transition for individual Orbit chains that use Arbitrum's software stack. Furthermore, Offchain Labs clarified that the ArbOS Atlas upgrade can be implemented by Orbit chains without the need for approval from the Arbitrum DAO governance process.

Arbitrum Implemented the Dencun Upgrade within its Ecosystem

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