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/

Copyright

Copyright and related rights waived via CC0.