The Constantinople fork reduces mining rewards, delays the difficulty bomb, and introduces new EVM instructions for logical shifts, counterfactual contract deployment, and computing bytecode hashes.

Note that, on certain testnets, this fork is divided in two: Constantinople followed by Petersburg. On these testnets, Constantinople contains an additional change, EIP-1283, which was reverted in Petersburg. Because EIP-1283 was never present on mainnet, this specification omits the whole awkward situation and presents only a single fork without EIP-1283.

Changes

• EIP-145: Bitwise shifting instructions in EVM

• EIP-1014: Skinny CREATE2

• EIP-1052: EXTCODEHASH opcode

• EIP-1234: Constantinople Difficulty Bomb Delay and Block Reward Adjustment

Upgrade Schedule

Releases

• EthereumJS 2.6.0

• Geth 1.8.23

• Harmony 2.3b74

• Nethermind 0.9.4

• Pantheon 0.9.1

• [Parity 2.2.10-stable][p]

• Trinity 0.1.0-alpha.23