IERC 777 Sender

Interface of the ERC777TokensSender standard as defined in the EIP. {IERC777} Token holders can be notified of operations performed on their tokens 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

tokensToSend

function tokensToSend(address operator, address from, address to, uint256 amount, bytes userData, bytes operatorData) external nonpayable

Called by an {IERC777} token contract whenever a registered holder's (from) tokens are about to be moved or destroyed. The type of operation is conveyed by to being the zero address or not. This call occurs before the token contract's state is updated, so {IERC777-balanceOf}, etc., can be used to query the pre-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