33 lines
1.1 KiB
Solidity
33 lines
1.1 KiB
Solidity
pragma solidity ^0.5.0;
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/**
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* @dev Interface of the ERC777TokensRecipient standard as defined in the EIP.
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*
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* Accounts can be notified of `IERC777` tokens being sent to them by having a
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* contract implement this interface (contract holders can be their own
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* implementer) and registering it on the
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* [ERC1820 global registry](https://eips.ethereum.org/EIPS/eip-1820).
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*
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* See `IERC1820Registry` and `ERC1820Implementer`.
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*/
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interface IERC777Recipient {
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/**
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* @dev Called by an `IERC777` token contract whenever tokens are being
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* moved or created into a registered account (`to`). The type of operation
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* is conveyed by `from` being the zero address or not.
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*
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* This call occurs _after_ the token contract's state is updated, so
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* `IERC777.balanceOf`, etc., can be used to query the post-operation state.
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*
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* This function may revert to prevent the operation from being executed.
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*/
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function tokensReceived(
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address operator,
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address from,
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address to,
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uint amount,
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bytes calldata userData,
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bytes calldata operatorData
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) external;
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}
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