Ethereum [ETH] Constantinople: 10335 users upgraded their Parity Ethereum nodes, says core developer

The whole cryptocurrency community has been waiting for the Constantinople hard fork since 2017. Recently, the team announced that the update has been postponed for the second time. This is because of a potential attack that can take place after the hard fork occurs.

The vulnerability was pointed out by ChainSecurity, an audit platform for smart contracts, as a part of the Ethereum bug bounty program. The team found that the update enables new Reentrancy Attack. The key factor is that the smart contracts are not vulnerable to the attack before the hard fork but only after the attack. This was because of one of the Ethereum Improvement Protocols‘, which proposes Net gas metering for SStore without dirty maps.

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