Contracts 4.0 Timeline

[abcoathup]

Hi @DaveAppleton,

@DaveAppleton

what is the current status of the contracts?

A second preview of Contracts 4.0 has been released this week.

OpenZeppelin Contracts 4.0 Beta

4.0.0-beta.1 update We just released the second preview of Contracts 4.0. This update includes some changes that have been requested by users. Some gas optimizations are also included. Changes ERC20 The ERC20Capped extensions now enforces the check directly in the _mint function, thus removing the addition gas cost this extension used to have on transfers. ERC721 A new extension, ERC721URIStorage re-implements the tokenURI mechanism that used to be part of the simple ERC721 implementation in t…

There may still be changes based on feedback.

@DaveAppleton

Fully Audited?

OpenZeppelin Contracts is community-vetted code.

Last full audit on v2.0.0 (https://github.com/OpenZeppelin/openzeppelin-contracts/tree/master/audit)

@DaveAppleton

Most importantly is there any significant gas advantage to using these contracts vs the previous ones.

Depending on your use case, then there can be gas advantages. e.g. storage optimizations for ERC721; see: OpenZeppelin Contracts 4.0 Beta