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Mark ERC777 and ERC1820 as deprecated (#4066)

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Hadrien Croubois
2023-02-24 00:06:22 +01:00
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docs/modules/ROOT/pages/erc777.adoc
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= ERC777
CAUTION: As of v4.9, OpenZeppelin's implementation of ERC-777 is deprecated and will be removed in the next major release.
Like xref:erc20.adoc[ERC20], ERC777 is a standard for xref:tokens.adoc#different-kinds-of-tokens[_fungible_ tokens], and is focused around allowing more complex interactions when trading tokens. More generally, it brings tokens and Ether closer together by providing the equivalent of a `msg.value` field, but for tokens.
The standard also brings multiple quality-of-life improvements, such as getting rid of the confusion around `decimals`, minting and burning with proper events, among others, but its killer feature is *receive hooks*. A hook is simply a function in a contract that is called when tokens are sent to it, meaning *accounts and contracts can react to receiving tokens*.