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)
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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Bumps @openzeppelin/contracts from 3.4.0 to 4.0.0.
Release notes
Sourced from
@openzeppelin/contracts's releases
.Changelog
Sourced from
@openzeppelin/contracts's changelog
.Commits
a673994
4.0.09b0e27c
add missing rewrite rule in scripts/migrate-imports.js90a72f9
Fix ERC721URIStorage in documentation1ee939e
4.0.0-rc.059f33c1
remove extra changelog entryd104ced
fix changelog format1fd5469
Update lockfile (#2573)27fc833
Make ERC1155.uri public (#2576)0b3e0d7
Further reorganisation of the repo (#2575)d75b4cf
Update changelog to list beta bugfix separatelyDependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
@dependabot rebase
.Dependabot commands and options
You can trigger Dependabot actions by commenting on this PR: - `@dependabot rebase` will rebase this PR - `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it - `@dependabot merge` will merge this PR after your CI passes on it - `@dependabot squash and merge` will squash and merge this PR after your CI passes on it - `@dependabot cancel merge` will cancel a previously requested merge and block automerging - `@dependabot reopen` will reopen this PR if it is closed - `@dependabot close` will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually - `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself) - `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself) - `@dependabot use these labels` will set the current labels as the default for future PRs for this repo and language - `@dependabot use these reviewers` will set the current reviewers as the default for future PRs for this repo and language - `@dependabot use these assignees` will set the current assignees as the default for future PRs for this repo and language - `@dependabot use this milestone` will set the current milestone as the default for future PRs for this repo and language - `@dependabot badge me` will comment on this PR with code to add a "Dependabot enabled" badge to your readme Additionally, you can set the following in your Dependabot [dashboard](https://app.dependabot.com): - Update frequency (including time of day and day of week) - Pull request limits (per update run and/or open at any time) - Automerge options (never/patch/minor, and dev/runtime dependencies) - Out-of-range updates (receive only lockfile updates, if desired) - Security updates (receive only security updates, if desired)