Ethereum client Geth joins Istanbul hard fork upgrade all proposals, has been upgraded to version 1.9.3

On September 3, Ethereum client Geth released version 1.9.3, which is an ordinary maintenance update, and also added the last three improvements to the Istanbul hard fork upgrade. The Ethereum Istanbul hard fork upgrade, which was scheduled to go online in October this year, will eventually add six improvement proposals: EIP-152 adds Blake2 pre-programming function; EIP-1108 reduces alt_bn128 pre-compiled Gas cost; EIP-1344 adds ChainID Opcode; EIP-2028 reduces Calldata Gas charges; EIP-1884 redefines trie-size based opcodes; EIP-2200 redefines the net value of SSTORE Gas charges considering changes in SLOAD Gas charges.