103 lines
3.4 KiB
Solidity
103 lines
3.4 KiB
Solidity
|
// SPDX-License-Identifier: MIT
|
||
|
|
|
||
|
|
pragma solidity ^0.6.0;
|
||
|
|
|
||
|
|
import "../access/AccessControl.sol";
|
||
|
|
import "../GSN/Context.sol";
|
||
|
|
import "../utils/Counters.sol";
|
||
|
|
import "../token/ERC721/ERC721.sol";
|
||
|
|
import "../token/ERC721/ERC721Burnable.sol";
|
||
|
|
import "../token/ERC721/ERC721Pausable.sol";
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev {ERC721} token, including:
|
||
|
|
*
|
||
|
|
* - ability for holders to burn (destroy) their tokens
|
||
|
|
* - a minter role that allows for token minting (creation)
|
||
|
|
* - a pauser role that allows to stop all token transfers
|
||
|
|
* - token ID and URI autogeneration
|
||
|
|
*
|
||
|
|
* This contract uses {AccessControl} to lock permissioned functions using the
|
||
|
|
* different roles - head to its documentation for details.
|
||
|
|
*
|
||
|
|
* The account that deploys the contract will be granted the minter and pauser
|
||
|
|
* roles, as well as the default admin role, which will let it grant both minter
|
||
|
|
* and pauser roles to other accounts.
|
||
|
|
*/
|
||
|
|
contract ERC721PresetMinterPauserAutoId is Context, AccessControl, ERC721Burnable, ERC721Pausable {
|
||
|
|
using Counters for Counters.Counter;
|
||
|
|
|
||
|
|
bytes32 public constant MINTER_ROLE = keccak256("MINTER_ROLE");
|
||
|
|
bytes32 public constant PAUSER_ROLE = keccak256("PAUSER_ROLE");
|
||
|
|
|
||
|
|
Counters.Counter private _tokenIdTracker;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev Grants `DEFAULT_ADMIN_ROLE`, `MINTER_ROLE` and `PAUSER_ROLE` to the
|
||
|
|
* account that deploys the contract.
|
||
|
|
*
|
||
|
|
* Token URIs will be autogenerated based on `baseURI` and their token IDs.
|
||
|
|
* See {ERC721-tokenURI}.
|
||
|
|
*/
|
||
|
|
constructor(string memory name, string memory symbol, string memory baseURI) public ERC721(name, symbol) {
|
||
|
|
_setupRole(DEFAULT_ADMIN_ROLE, _msgSender());
|
||
|
|
|
||
|
|
_setupRole(MINTER_ROLE, _msgSender());
|
||
|
|
_setupRole(PAUSER_ROLE, _msgSender());
|
||
|
|
|
||
|
|
_setBaseURI(baseURI);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev Creates a new token for `to`. Its token ID will be automatically
|
||
|
|
* assigned (and available on the emitted {IERC721-Transfer} event), and the token
|
||
|
|
* URI autogenerated based on the base URI passed at construction.
|
||
|
|
*
|
||
|
|
* See {ERC721-_mint}.
|
||
|
|
*
|
||
|
|
* Requirements:
|
||
|
|
*
|
||
|
|
* - the caller must have the `MINTER_ROLE`.
|
||
|
|
*/
|
||
|
|
function mint(address to) public virtual {
|
||
|
|
require(hasRole(MINTER_ROLE, _msgSender()), "ERC721PresetMinterPauserAutoId: must have minter role to mint");
|
||
|
|
|
||
|
|
// We cannot just use balanceOf to create the new tokenId because tokens
|
||
|
|
// can be burned (destroyed), so we need a separate counter.
|
||
|
|
_mint(to, _tokenIdTracker.current());
|
||
|
|
_tokenIdTracker.increment();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev Pauses all token transfers.
|
||
|
|
*
|
||
|
|
* See {ERC721Pausable} and {Pausable-_pause}.
|
||
|
|
*
|
||
|
|
* Requirements:
|
||
|
|
*
|
||
|
|
* - the caller must have the `PAUSER_ROLE`.
|
||
|
|
*/
|
||
|
|
function pause() public virtual {
|
||
|
|
require(hasRole(PAUSER_ROLE, _msgSender()), "ERC721PresetMinterPauserAutoId: must have pauser role to pause");
|
||
|
|
_pause();
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @dev Unpauses all token transfers.
|
||
|
|
*
|
||
|
|
* See {ERC721Pausable} and {Pausable-_unpause}.
|
||
|
|
*
|
||
|
|
* Requirements:
|
||
|
|
*
|
||
|
|
* - the caller must have the `PAUSER_ROLE`.
|
||
|
|
*/
|
||
|
|
function unpause() public virtual {
|
||
|
|
require(hasRole(PAUSER_ROLE, _msgSender()), "ERC721PresetMinterPauserAutoId: must have pauser role to unpause");
|
||
|
|
_unpause();
|
||
|
|
}
|
||
|
|
|
||
|
|
function _beforeTokenTransfer(address from, address to, uint256 tokenId) internal virtual override(ERC721, ERC721Pausable) {
|
||
|
|
super._beforeTokenTransfer(from, to, tokenId);
|
||
|
|
}
|
||
|
|
}
|