60205944bb
* 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
= ERC 777
[.readme-notice]
NOTE: This document is better viewed at https://docs.openzeppelin.com/contracts/api/token/erc777
This set of interfaces and contracts are all related to the [ERC777 token standard](https://eips.ethereum.org/EIPS/eip-777).
TIP: For an overview of ERC777 tokens and a walk through on how to create a token contract read our xref:ROOT:erc777.adoc[ERC777 guide].
The token behavior itself is implemented in the core contracts: {IERC777}, {ERC777}.
Additionally there are interfaces used to develop contracts that react to token movements: {IERC777Sender}, {IERC777Recipient}.
== Core
{{IERC777}}
{{ERC777}}
== Hooks
{{IERC777Sender}}
{{IERC777Recipient}}