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35 lines
1005 B
Solidity
35 lines
1005 B
Solidity
2 years ago
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// SPDX-License-Identifier: MIT
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// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/extensions/ERC721Pausable.sol)
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pragma solidity ^0.8.0;
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import "../ERC721.sol";
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import "../../../security/Pausable.sol";
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/**
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* @dev ERC721 token with pausable token transfers, minting and burning.
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*
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* Useful for scenarios such as preventing trades until the end of an evaluation
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* period, or having an emergency switch for freezing all token transfers in the
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* event of a large bug.
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*/
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abstract contract ERC721Pausable is ERC721, Pausable {
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/**
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* @dev See {ERC721-_beforeTokenTransfer}.
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*
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* Requirements:
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*
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* - the contract must not be paused.
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*/
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function _beforeTokenTransfer(
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address from,
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address to,
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uint256 firstTokenId,
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uint256 batchSize
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) internal virtual override {
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super._beforeTokenTransfer(from, to, firstTokenId, batchSize);
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require(!paused(), "ERC721Pausable: token transfer while paused");
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}
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}
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