The long-awaited Ethereum upgrade known as Cancun-Deneb (or Dencun) is finally approaching mainnet. The upgrade combines two Ethereum Improvement Proposals (EIPs)—EIP-4844 (proto-danksharding) and EIP-1153 (transient storage), among others. Together, they drastically improve Layer 2 scalability, lower gas costs, and set the foundation for full sharding.
EIP-4844 introduces blob-carrying transactions, which allow rollups like Arbitrum, Base and Optimism to scale more efficiently without overloading Ethereum’s core data layer. This could reduce average L2 gas fees by 50–80%, making DeFi more accessible for global users.
The upgrade also brings changes for dApp developers, such as better storage compression and faster contract execution. With most major clients already in sync, the community expects a September 2025 rollout. This upgrade will likely trigger an innovation wave on Layer 2s and may act as a bullish catalyst for ETH.
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