smartcontractkit / truffle-starter-kit

An example smart contract utilizing Chainlink
MIT License
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Bump @openzeppelin/contracts from 3.4.0 to 4.0.0 #74

Closed dependabot-preview[bot] closed 3 years ago

dependabot-preview[bot] commented 3 years ago

Bumps @openzeppelin/contracts from 3.4.0 to 4.0.0.

Release notes

Sourced from @openzeppelin/contracts's releases.

v4.0.0-beta.0

A beta release for Solidity 0.8. Read the announcement in the forum.

Changelog

Sourced from @openzeppelin/contracts's changelog.

4.0.0 (2021-03-23)

  • Now targeting the 0.8.x line of Solidity compilers. For 0.6.x (resp 0.7.x) support, use version 3.4.0 (resp 3.4.0-solc-0.7) of OpenZeppelin.
  • Context: making _msgData return bytes calldata instead of bytes memory (#2492)
  • ERC20: removed the _setDecimals function and the storage slot associated to decimals. (#2502)
  • Strings: addition of a toHexString function. (#2504)
  • EnumerableMap: change implementation to optimize for key → value lookups instead of enumeration. (#2518)
  • GSN: deprecate GSNv1 support in favor of upcoming support for GSNv2. (#2521)
  • ERC165: remove uses of storage in the base ERC165 implementation. ERC165 based contracts now use storage-less virtual functions. Old behavior remains available in the ERC165Storage extension. (#2505)
  • Initializable: make initializer check stricter during construction. (#2531)
  • ERC721: remove enumerability of tokens from the base implementation. This feature is now provided separately through the ERC721Enumerable extension. (#2511)
  • AccessControl: removed enumerability by default for a more lightweight contract. It is now opt-in through AccessControlEnumerable. (#2512)
  • Meta Transactions: add ERC2771Context and a MinimalForwarder for meta-transactions. (#2508)
  • Overall reorganization of the contract folder to improve clarity and discoverability. (#2503)
  • ERC20Capped: optimize gas usage by enforcing the check directly in _mint. (#2524)
  • Rename UpgradeableProxy to ERC1967Proxy. (#2547)
  • ERC777: optimize the gas costs of the constructor. (#2551)
  • ERC721URIStorage: add a new extension that implements the _setTokenURI behavior as it was available in 3.4.0. (#2555)
  • AccessControl: added ERC165 interface detection. (#2562)
  • ERC1155: make uri public so overloading function can call it using super. (#2576)

Bug fixes for beta releases

  • AccessControlEnumerable: Fixed renounceRole not updating enumerable set of addresses for a role. (#2572)

How to upgrade from 3.x

Since this version has moved a few contracts to different directories, users upgrading from a previous version will need to adjust their import statements. To make this easier, the package includes a script that will migrate import statements automatically. After upgrading to the latest version of the package, run:

npx openzeppelin-contracts-migrate-imports

Make sure you're using git or another version control system to be able to recover from any potential error in our script.

How to upgrade from 4.0-beta.x

Some further changes have been done between the different beta iterations. Transitions made during this period are configured in the migrate-imports script. Consequently, you can upgrade from any previous 4.0-beta.x version using the same script as described in the How to upgrade from 3.x section.

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dependabot-preview[bot] commented 3 years ago

Superseded by #87.