OpenZeppelin upgradeable contracts affected by Istanbul hardfork

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People interested in this might also be interested in our article about protecting against reentrancy.

Reentrancy After Istanbul

Originally published at: https://blog.openzeppelin.com/reentrancy-after-istanbul/ [image] How to protect your contracts against reentrancy after Ethereum’s Istanbul hard fork. The upcoming Istanbul hard fork, scheduled for early December, includes among other things EIP1884: “Repricing for trie-size-dependent opcodes”. The key word is “repricing”, and it means that some instructions will now cost more gas to execute. The reason why this has been talked about so much lately is that exist…