Byzantium

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Spurious Dragon
Consensus upgrade
TypeHard fork
StatusEnabled at block 4,370,000
PreviousSpurious Dragon
NextConstantinople
Ethereum family

Byzantium is a hard fork on Ethereum.

Specification[edit | edit source]

Enable the following 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)