The Constantinople hard fork will be deployed to the Ethereum ($ETH) Ropsten testnet on Oct. 9, after a unanimous agreement. Created April 20, 2017, EIP 1013, Constantinople, will allow for the transition of the Ethereum network consensus from Proof of Work to Proof of Stake. This update will help the network to solve its scalability problems and lower transaction fees by increasing the efficiency of the chain and the use of space in its blocks.