5dfe7215a9
* Initial migration to Solidity 0.6.x - v3.0 first steps (#2063) * Initial migration, missing GSN, 721, 777 and Crowdsales. * Add _beforeTokenOperation and _afterTokenOperation. * Add documentation for hooks. * Add hooks doc * Add missing drafts * Add back ERC721 with hooks * Bring back ERC777 * Notes on hooks * Bring back GSN * Make functions virtual * Make GSN overrides explicit * Fix ERC20Pausable tests * Remove virtual from some view functions * Update linter * Delete examples * Remove unnecessary virtual * Remove roles from Pausable * Remove roles * Remove users of roles * Adapt ERC20 tests * Fix ERC721 tests * Add all ERC721 hooks * Add ERC777 hooks * Fix remaining tests * Bump compiler version * Move 721BurnableMock into mocks directory * Remove _before hooks * Fix tests * Upgrade linter * Put modifiers last * Remove _beforeTokenApproval and _beforeOperatorApproval hooks
33 lines
1.1 KiB
Solidity
33 lines
1.1 KiB
Solidity
pragma solidity ^0.6.0;
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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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* https://eips.ethereum.org/EIPS/eip-1820[ERC1820 global registry].
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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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uint256 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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