openzeppelin-solidity - npm Package Versions

3.2.0 (2020-09-10)

New features

• Proxies: added the proxy contracts from OpenZeppelin SDK. (#2335)

Proxy changes with respect to OpenZeppelin SDK

Aside from upgrading them from Solidity 0.5 to 0.6, we've changed a few minor things from the proxy contracts as they were found in OpenZeppelin SDK.

• UpgradeabilityProxy was renamed to UpgradeableProxy.
• AdminUpgradeabilityProxy was renamed to TransparentUpgradeableProxy.
• Proxy._willFallback was renamed to Proxy._beforeFallback.
• UpgradeabilityProxy._setImplementation and AdminUpgradeabilityProxy._setAdmin were made private.

Improvements

• Address.isContract: switched from extcodehash to extcodesize for less gas usage. (#2311)

Breaking changes

• ERC20Snapshot: switched to using _beforeTokenTransfer hook instead of overriding ERC20 operations. (#2312)

This small change in the way we implemented ERC20Snapshot may affect users who are combining this contract with other ERC20 flavors, since it no longer overrides _transfer, _mint, and _burn. This can result in having to remove Solidity override(...) specifiers in derived contracts for these functions, and to instead have to add it for _beforeTokenTransfer. See Using Hooks in the documentation.

3.1.0 (2020-06-23)

New features

• SafeCast: added functions to downcast signed integers (e.g. toInt32), improving usability of SignedSafeMath. (#2243)
• functionCall: new helpers that replicate Solidity's function call semantics, reducing the need to rely on call. (#2264)
• ERC1155: added support for a base implementation, non-standard extensions and a preset contract. (#2014, #2230)

Improvements

• ReentrancyGuard: reduced overhead of using the nonReentrant modifier. (#2171)
• AccessControl: added a RoleAdminChanged event to _setAdminRole. (#2214)
• Made all public functions in the token preset contracts virtual. (#2257)

Deprecations

• SafeERC20: deprecated safeApprove. (#2268)

3.0.2 (2020-06-08)

Improvements

• Added SPX license identifier to all contracts. (#2235)

3.0.1 (2020-04-27)

Bugfixes

• ERC777: fixed the _approve internal function not validating some of their arguments for non-zero addresses. (#2213)

2.5.1 (2020-04-24)

Bugfixes

• ERC777: fixed the _send and _approve internal functions not validating some of their arguments for non-zero addresses. (#2212)

3.0.0 (2020-04-20)

New features

• AccessControl: new contract for managing permissions in a system, replacement for Ownable and Roles. (#2112)
• SafeCast: new functions to convert to and from signed and unsigned values: toUint256 and toInt256. (#2123)
• EnumerableMap: a new data structure for key-value pairs (like mapping) that can be iterated over. (#2160)

Breaking changes

• ERC721: burn(owner, tokenId) was removed, use burn(tokenId) instead. (#2125)
• ERC721: _checkOnERC721Received was removed. (#2125)
• ERC721: _transferFrom and _safeTransferFrom were renamed to _transfer and _safeTransfer. (#2162)
• Ownable: removed _transferOwnership. (#2162)
• PullPayment, Escrow: withdrawWithGas was removed. The old withdraw function now forwards all gas. (#2125)
• Roles was removed, use AccessControl as a replacement. (#2112)
• ECDSA: when receiving an invalid signature, recover now reverts instead of returning the zero address. (#2114)
• Create2: added an amount argument to deploy for contracts with payable constructors. (#2117)
• Pausable: moved to the utils directory. (#2122)
• Strings: moved to the utils directory. (#2122)
• Counters: moved to the utils directory. (#2122)
• SignedSafeMath: moved to the math directory. (#2122)
• ERC20Snapshot: moved to the token/ERC20 directory. snapshot was changed into an internal function. (#2122)
• Ownable: moved to the access directory. (#2120)
• Ownable: removed isOwner. (#2120)
• Secondary: removed from the library, use Ownable instead. (#2120)
• Escrow, ConditionalEscrow, RefundEscrow: these now use Ownable instead of Secondary, their external API changed accordingly. (#2120)
• ERC20: removed _burnFrom. (#2119)
• Address: removed toPayable, use payable(address) instead. (#2133)
• ERC777: _send, _mint and _burn now use the caller as the operator. (#2134)
• ERC777: removed _callsTokensToSend and _callTokensReceived. (#2134)
• EnumerableSet: renamed get to at. (#2151)
• ERC165Checker: functions no longer have a leading underscore. (#2150)
• ERC721Metadata, ERC721Enumerable: these contracts were removed, and their functionality merged into ERC721. (#2160)
• ERC721: added a constructor for name and symbol. (#2160)
• ERC20Detailed: this contract was removed and its functionality merged into ERC20. (#2161)
• ERC20: added a constructor for name and symbol. decimals now defaults to 18. (#2161)
• Strings: renamed fromUint256 to toString (#2188)