EIPs

EIP609 - Hardfork Meta: Byzantium

# Abstract

This specifies the changes included in the hard fork named Byzantium.

# Specification

  • Codename: Byzantium
  • Aliases: Metropolis/Byzantium, Metropolis part 1
  • Activation:
    • Block >= 4,370,000 on Mainnet
    • Block >= 1,700,000 on Ropsten testnet
  • Included EIPs:
    • EIP-100 (Change difficulty adjustment to target mean block time including uncles)
    • EIP-140 (REVERT instruction in the Ethereum Virtual Machine)
    • EIP-196 (Precompiled contracts for addition and scalar multiplication on the elliptic curve alt_bn128)
    • EIP-197 (Precompiled contracts for optimal ate pairing check on the elliptic curve alt_bn128)
    • EIP-198 (Precompiled contract for bigint modular exponentiation)
    • EIP-211 (New opcodes: RETURNDATASIZE and RETURNDATACOPY)
    • EIP-214 (New opcode STATICCALL)
    • EIP-649 (Difficulty Bomb Delay and Block Reward Reduction)
    • EIP-658 (Embedding transaction status code in receipts)

# References

  1. https://blog.ethereum.org/2017/10/12/byzantium-hf-announcement/

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