Hardfork #4: Constantinople activation

Hardfork #4: Constantinople activation (ETA: 2019-07-24)

Clients

Geth: https://github.com/EthereumCommonwealth/go-callisto/releases/tag/1.1
Parity: https://github.com/EthereumCommonwealth/rust-callisto

The integration of EIP 145 , EIP 1052 , EIP 1283 and EIP 1014 during the block 3 100 000 will significantly improve the performance of the Callisto’s blockchain by enhancing its scalability and reducing gas consumption.