Hello everyone, I am making my first small dapp with erc721, and I am facing this error on Remix IDE: https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/utils/Address.sol:29:32: Warning: The “extcodehash” instruction is not supported by the VM version “byzantium” you are …

Welcome to the community @vortextemporum :wave: I assume that you are importing OpenZeppelin Contracts from the master branch and you are using Compiler version 0.5.1. You should only use code published in an official release of OpenZeppelin Contracts, the latest release is 2.3 . When importing via…

Warning: The "extcodehash" instruction is not supported by the VM version "byzantium" you are currently compiling for

Support Contracts

abcoathup August 22, 2019, 1:03pm 6

Hi @vortextemporum
Great to hear that it is working for you now.

If you get a chance it would be great to hear about the app that you are working on.

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Warning: The "extcodehash" instruction is not supported by the VM version "byzantium" you are currently compiling for

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