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EIP-1679: Hardfork Meta: Istanbul

Authors Alex Beregszaszi (@axic), Afri Schoedon (@5chdn)
Created 2019-01-04
Requires EIP-152, EIP-1108, EIP-1344, EIP-1716, EIP-1884, EIP-2028, EIP-2200


This meta-EIP specifies the changes included in the Ethereum hardfork named Istanbul.


  • Codename: Istanbul


  • Block >= 9,069,000 on the Ethereum Mainnet
  • Block >= 6,485,846 on the Ropsten testnet
  • Block >= 14,111,141 on the Kovan testnet
  • Block >= 5,435,345 on the Rinkeby testnet
  • Block >= 1,561,651 on the Görli testnet

Included EIPs

  • EIP-152: Add Blake2 compression function F precompile
  • EIP-1108: Reduce alt_bn128 precompile gas costs
  • EIP-1344: Add ChainID opcode
  • EIP-1884: Repricing for trie-size-dependent opcodes
  • EIP-2028: Calldata gas cost reduction
  • EIP-2200: Rebalance net-metered SSTORE gas cost with consideration of SLOAD gas cost change


  1. Included EIPs were finalized in All Core Devs Call #68

Copyright and related rights waived via CC0.


Please cite this document as:

Alex Beregszaszi (@axic), Afri Schoedon (@5chdn), "EIP-1679: Hardfork Meta: Istanbul," Ethereum Improvement Proposals, no. 1679, January 2019. [Online serial]. Available: