04fc35707d
* Update contract pragmas to solidity 0.7 * Remove internal declaration on constructors * Reference SafeMath explicitely * Remove public constructor declaration from abstract contracts * Remove public constructor declaration from non-abstract contracts
23 lines
862 B
Solidity
23 lines
862 B
Solidity
// SPDX-License-Identifier: MIT
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pragma solidity ^0.7.0;
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/**
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* @title ERC721 token receiver interface
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* @dev Interface for any contract that wants to support safeTransfers
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* from ERC721 asset contracts.
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*/
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interface IERC721Receiver {
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/**
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* @dev Whenever an {IERC721} `tokenId` token is transferred to this contract via {IERC721-safeTransferFrom}
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* by `operator` from `from`, this function is called.
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*
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* It must return its Solidity selector to confirm the token transfer.
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* If any other value is returned or the interface is not implemented by the recipient, the transfer will be reverted.
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*
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* The selector can be obtained in Solidity with `IERC721.onERC721Received.selector`.
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*/
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function onERC721Received(address operator, address from, uint256 tokenId, bytes calldata data)
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external returns (bytes4);
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}
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