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Istanbul is the name given to the next Ethereum upgrade.


  • 5/17/19 - Hard deadline to accept EIPs
  • 7/19/19 - Soft deadline for major client implementations of EIPs
  • 9/04/19 - Testnet upgrades
  • 10/16/19 - Mainnet upgrade

EIPs accepted

  • EIP-152: Add Blake2 compression function F precompile
  • EIP-1108: Reduce alt_bn128 precompile gas costs
  • EIP-1344: Add ChainID opcode
  • EIP-1844: 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