Byzantium Hard Fork changes

James Ray edited this page Aug 22, 2018 · 5 revisions

Contents

What changes are included in the Byzantium hard fork?

The following upgrades are included:

  • Addition of ‘REVERT’ opcode, which permits error handling without consuming all gas (EIP 140)
  • Transaction receipts now include a status field to indicate success or failure EIP 658)
  • Elliptic curve addition and scalar multiplication on alt_bn128 (EIP 196) and pairing checks (EIP 197), permitting ZK-Snarks and other cryptographic mathemagic™
  • Support for big integer modular exponentiation (EIP 198), enabling RSA signature verification and other cryptographic applications
  • Support for variable length return values (EIP 211)
  • Addition of the ‘STATICCALL’ opcode, permitting non-state-changing calls to other contracts (EIP 214)
  • Changes to the difficulty adjustment formula to take uncles into account (EIP 100)
  • Delay of the ice age / difficulty bomb by 1 year, and reduction of block reward from 5 to 3 ether (EIP 649)

Source: verbatim extract from this Ethereum blog post.

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