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Normative spec: the Ecotone specification is the canonical definition of this upgrade. This page records activation data and operational pointers; it does not restate the spec.
Ecotone brought Ethereum’s Dencun upgrade to the OP Stack and adopted EIP-4844 blobs for data availability, dramatically reducing L1 data costs.

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What changed

Per the spec overview:
  • Cancun EIPs on L2: EIP-1153 (transient storage), EIP-4844 (with blob transactions disabled on L2), EIP-4788 (L1 beacon block root embedded into L2), EIP-5656 (MCOPY), EIP-6780 (SELFDESTRUCT only in same transaction), and EIP-7516 (BLOBBASEFEE, always pushing 1 on L2).
  • Consensus layer: blob data availability in the L1 data-retrieval stage and in L1 data fee computation.
  • Auto-upgrade and extension of the L1Block (L1 attributes) predeploy.