IERC 777 Recipient Upgradeable
Interface of the ERC777TokensRecipient standard as defined in the EIP. Accounts can be notified of {IERC777} tokens being sent to them by having a contract implement this interface (contract holders can be their own implementer) and registering it on the https://eips.ethereum.org/EIPS/eip-1820[ERC1820 global registry]. See {IERC1820Registry} and {ERC1820Implementer}.
Methods
tokensReceived
Called by an {IERC777} token contract whenever tokens are being moved or created into a registered account (to). The type of operation is conveyed by from being the zero address or not. This call occurs after the token contract's state is updated, so {IERC777-balanceOf}, etc., can be used to query the post-operation state. This function may revert to prevent the operation from being executed.
Parameters
| Name | Type | Description |
|---|---|---|
operator | address | undefined |
from | address | undefined |
to | address | undefined |
amount | uint256 | undefined |
userData | bytes | undefined |
operatorData | bytes | undefined |
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