* Clean code
- using type().interfaceId to improve readeability of ERC165 registration
- hardcoding some keccak256 that are otherwise computed at construction.
* hardcode keccak256 result
* Improve code readeability using try/catch
* Remove hardcoded hash
tests show that solc 0.8.0 does the optimization as expected
* Use try/catch to improve readability
* ERC165Checker: Do not revert when returndata is empty + new test
* Address PR comments
* improve testing of ERC721Receiver errors
* put back comment about invalid interface id
* coverage does not support 0.8.1. Reverting back to 0.8.0
* bubble all data with length > 0 if onERC721Receive fails.
* Fix test: revert without message trigger is bubble with the default message
* using enum object to improve readability
* Remove _grantRole and _revokeRole, replace with _setupRole
* Make all external AccessControl functions public
* Remove Ownable._transferOwnership
* Rename ERC721's _safeTransferFrom and _transferFrom to _safeTransfer and _transfer
* Make all ERC721 external functions public
* Make all miscelaneous external functions public instead
* Add changelog entry
* Move calldata arguments to memory
* Update contracts/access/AccessControl.sol
Co-Authored-By: Francisco Giordano <frangio.1@gmail.com>
* Restrict setupRole to the constructor
* Replace isConstructor for !isContract
Co-authored-by: Francisco Giordano <frangio.1@gmail.com>
* Add revert reason to EnumerableSet.get.
* Rename EnumerableSet values to keys
* Rename get to at
* Add changelog entry
* Rename keys to values
* Add leading underscore to struct members
* Remove Roles
* Add AccessControl and tests
* Removed IAccessControl
* Add RoleGranted and RoleRevoked events
* Make roles grantable and revokable regardless of their previous status
* Fix typo
* Add documentation
* Cleanup tests
* Add enumeration tests
* Add _setRoleAdmin tests
* Fix lint error
* Fix AccessControl link in docs
* WIP on access control guide
* Rename getRoleMembersCount
* Add tests for new role admin
* Make AccessControl GSN compatible
* Update access control guide
* Rename admin to adminRole
* Rename roleIds to roles
* Add 'operator' to RoleGranted and RoleRevoked events.
* Only emit events if the roles were not previously granted/revoked
* Uncomment expectEvent.not tests
* Rename operator to sender
* Add changelog entry
