76 lines
2.2 KiB
Solidity
76 lines
2.2 KiB
Solidity
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// SPDX-License-Identifier: Mozilla Public License 2.0
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pragma solidity ^0.8.17;
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import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
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import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol";
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import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Burnable.sol";
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import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Pausable.sol";
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import "@openzeppelin/contracts/utils/Context.sol";
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import "@openzeppelin/contracts/utils/Counters.sol";
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contract BaseERC721 is
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Context,
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ERC721Enumerable,
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ERC721Burnable,
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ERC721Pausable
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{
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using Counters for Counters.Counter;
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Counters.Counter private _tokenIdTracker;
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string private _baseTokenURI;
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constructor(
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string memory name,
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string memory symbol,
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string memory baseTokenURI
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) ERC721(name, symbol) {
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_baseTokenURI = baseTokenURI;
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}
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function _baseURI() internal view virtual override returns (string memory) {
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return _baseTokenURI;
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}
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/**
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* @dev Creates a new token for `to`. Its token ID will be automatically
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* assigned (and available on the emitted {IERC721-Transfer} event), and the token
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* URI autogenerated based on the base URI passed at construction.
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*
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* See {ERC721-_mint}.
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*
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* Requirements:
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*
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* - the caller must have the `MINTER_ROLE`.
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*/
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function _mintTo(address to) internal {
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// We cannot just use balanceOf to create the new tokenId because tokens
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// can be burned (destroyed), so we need a separate counter.
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_mint(to, _tokenIdTracker.current());
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_tokenIdTracker.increment();
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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(ERC721, ERC721Enumerable, ERC721Pausable) {
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super._beforeTokenTransfer(from, to, firstTokenId, batchSize);
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}
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/**
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* @dev See {IERC165-supportsInterface}.
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*/
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function supportsInterface(bytes4 interfaceId)
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public
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view
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virtual
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override(ERC721, ERC721Enumerable)
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returns (bool)
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{
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return super.supportsInterface(interfaceId);
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}
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}
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