Created
October 13, 2021 10:40
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| // SPDX-License-Identifier: MIT | |
| pragma solidity ^0.8.2; | |
| import "@openzeppelin/contracts/token/ERC721/ERC721.sol"; | |
| import "@openzeppelin/contracts/access/Ownable.sol"; | |
| import "@openzeppelin/contracts/utils/Counters.sol"; | |
| import "@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol"; | |
| contract TestToken is ERC721, ERC721Enumerable, Ownable { | |
| using Counters for Counters.Counter; | |
| Counters.Counter private _tokenIdCounter; | |
| uint256 public constant MAX_TOKENS = 100; | |
| uint256 public constant MAX_TOKENS_PER_SALE = 5; | |
| string private baseURI; | |
| bool public isSaleActive = true; | |
| uint256 private price = 0.02 ether; | |
| constructor() ERC721("Test Token", "TT") {} | |
| function flipSaleStatus() public onlyOwner() { | |
| isSaleActive = !isSaleActive; | |
| } | |
| function setPrice(uint256 _price) public onlyOwner() { | |
| price = _price; | |
| } | |
| function setBaseURI(string memory _newBaseURI) public onlyOwner() { | |
| baseURI = _newBaseURI; | |
| } | |
| function _baseURI() internal view override returns (string memory) { | |
| return baseURI; | |
| } | |
| function safeMint(uint256 _amount) public payable { | |
| require(isSaleActive, "Sale is currently not active"); | |
| require(MAX_TOKENS >= _amount + _tokenIdCounter.current(), "Not enough tokens left to buy."); | |
| require(_amount > 0 && _amount < MAX_TOKENS_PER_SALE + 1, "Amount of tokens exceeds amount of tokens you can purchase in a single purchase."); | |
| require(msg.value >= price * _amount, "Amount of ether sent not correct."); | |
| for(uint256 i = 0; i < _amount; i++){ | |
| _safeMint(msg.sender, _tokenIdCounter.current()); | |
| _tokenIdCounter.increment(); | |
| } | |
| } | |
| function reserveTokens(uint256 _amount) public onlyOwner() { | |
| require(MAX_TOKENS >= _amount + _tokenIdCounter.current(), "Not enough tokens left to buy."); | |
| for (uint i = 0; i < _amount; i++) { | |
| _safeMint(msg.sender, _tokenIdCounter.current()); | |
| _tokenIdCounter.increment(); | |
| } | |
| } | |
| // The following functions are overrides required by Solidity for ERC721Enumerable. | |
| function _beforeTokenTransfer(address from, address to, uint256 tokenId) | |
| internal | |
| override(ERC721, ERC721Enumerable) | |
| { | |
| super._beforeTokenTransfer(from, to, tokenId); | |
| } | |
| function supportsInterface(bytes4 interfaceId) | |
| public | |
| view | |
| override(ERC721, ERC721Enumerable) | |
| returns (bool) | |
| { | |
| return super.supportsInterface(interfaceId); | |
| } | |
| } |
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