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EIP-7607: Hardfork Meta - Fusaka

EIPs included in the Fulu/Osaka Ethereum network upgrade.

Authors Tim Beiko (@timbeiko), Alex Stokes (@ralexstokes), Ansgar Dietrichs (@adietrichs)
Created 2024-02-01
Last Call Deadline 2025-10-28
Requires EIP-7600

Abstract

This Meta EIP lists the EIPs formally Scheduled for Inclusion in the Fulu/Osaka network upgrade.

Specification

Definitions for Scheduled for Inclusion, Considered for Inclusion, Proposed for Inclusion and Declined for Inclusion can be found in EIP-7723.

EIPs Scheduled for Inclusion

Core EIPs

  • EIP-7594: PeerDAS - Peer Data Availability Sampling
  • EIP-7823: Set upper bounds for MODEXP
  • EIP-7825: Transaction Gas Limit Cap
  • EIP-7883: ModExp Gas Cost Increase
  • EIP-7917: Deterministic proposer lookahead
  • EIP-7918: Blob base fee bounded by execution cost
  • EIP-7934: RLP Execution Block Size Limit
  • EIP-7939: Count leading zeros (CLZ) opcode
  • EIP-7951: Precompile for secp256r1 Curve Support

Other EIPs

  • EIP-7892: Blob Parameter Only Hardforks
  • EIP-7642: eth/69 - Drop pre-merge fields
    • Client teams MUST support this EIP by the activation of the Fusaka network upgrade.
  • EIP-7910: eth_config JSON-RPC Method
    • Client teams MUST support this JSON RPC method by the activation of Fusaka network upgrade.
  • EIP-7935: Set default gas limit to 60M

Activation

Network Name Activation Epoch Activation Timestamp Activation Time (UTC) Fork ID
Holešky 165120 1759308480 2025-10-01 08:48:00 0x783def52
Sepolia 272640 1760427360 2025-10-14 07:36:00 0xe2ae4999
Hoodi 50688 1761677592 2025-10-28 18:53:12 0xe7e0e7ff
Mainnet TBD TBD TBD TBD

Blob Parameter Only Forks

Blob Parameter Only (BPO) forks, defined in EIP-7892, are scheduled alongside Fusaka to raise blob capacity without additional protocol changes.

BPO 1

Network Name Activation Epoch Activation Timestamp Activation Time (UTC) Fork ID
Holešky 166400 1759800000 2025-10-07 01:20:00 0xa280a45c
Sepolia 274176 1761017184 2025-10-21 03:26:24 0x56078a1e
Hoodi 52480 1762365720 2025-11-05 18:02:00 0x3893353e
Mainnet TBD TBD TBD TBD

BPO 2

Network Name Activation Epoch Activation Timestamp Activation Time (UTC) Fork ID
Holešky 167936 1760389824 2025-10-13 21:10:24 0x9bc6cb31
Sepolia 275712 1761607008 2025-10-27 23:16:48 0x268956b6
Hoodi 54016 1762955544 2025-11-12 13:52:24 0x23aa1351
Mainnet TBD TBD TBD TBD

Rationale

This Meta EIP provides a global view of all changes included in the Fusaka network upgrade, as well as links to full specification.

Security Considerations

None.

Copyright and related rights waived via CC0.

Citation

Please cite this document as:

Tim Beiko (@timbeiko), Alex Stokes (@ralexstokes), Ansgar Dietrichs (@adietrichs), "EIP-7607: Hardfork Meta - Fusaka [DRAFT]," Ethereum Improvement Proposals, no. 7607, February 2024. [Online serial]. Available: https://eips.ethereum.org/EIPS/eip-7607.