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Royalty implementation for NFTs. https://www.youtube.com/watch?v=h6Fb_dPZCd0
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// SPDX-License-Identifier: MIT | |
pragma solidity ^0.8.2; | |
import "@openzeppelin/contracts@4.4.2/token/ERC721/ERC721.sol"; | |
import "@openzeppelin/contracts@4.4.2/token/ERC721/extensions/ERC721Enumerable.sol"; | |
import "@openzeppelin/contracts@4.4.2/access/Ownable.sol"; | |
contract MyToken is ERC721, ERC721Enumerable, Ownable { | |
string public contractURI; | |
uint96 royaltyFeesInBips; | |
address royaltyAddress; | |
constructor(uint96 _royaltyFeesInBips, string memory _contractURI) ERC721("MyToken", "MTK") { | |
royaltyFeesInBips = _royaltyFeesInBips; | |
royaltyAddress = owner(); | |
contractURI = _contractURI; | |
// setRoyaltyInfo(msg.sender, _royaltyFeesInBips); | |
} | |
function safeMint(address to, uint256 tokenId) public onlyOwner { | |
_safeMint(to, tokenId); | |
} | |
function setRoyaltyInfo(address _receiver, uint96 _royaltyFeesInBips) public onlyOwner { | |
royaltyAddress = _receiver; | |
royaltyFeesInBips = _royaltyFeesInBips; | |
} | |
function setContractURI(string calldata _contractURI) public onlyOwner { | |
contractURI = _contractURI; | |
} | |
// The following functions are overrides required by Solidity. | |
function _beforeTokenTransfer(address from, address to, uint256 tokenId) | |
internal | |
override(ERC721, ERC721Enumerable) | |
{ | |
super._beforeTokenTransfer(from, to, tokenId); | |
} | |
function royaltyInfo(uint256 _tokenId, uint256 _salePrice) | |
external | |
view | |
virtual | |
override | |
returns (address, uint256) | |
{ | |
return (royaltyAddress, calculateRoyalty(_salePrice)); | |
} | |
function calculateRoyalty(uint256 _salePrice) pure public returns (uint256) { | |
return (_salePrice / 10000) * royaltyFeesInBips; | |
} | |
function supportsInterface(bytes4 interfaceId) | |
public | |
view | |
override(ERC721, ERC721Enumerable) | |
returns (bool) | |
{ | |
return interfaceId == 0x2a55205a || super.supportsInterface(interfaceId); | |
} | |
} |
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// SPDX-License-Identifier: MIT | |
pragma solidity ^0.8.2; | |
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/common/ERC2981.sol"; | |
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC721/ERC721.sol"; | |
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/token/ERC721/extensions/ERC721Enumerable.sol"; | |
import "https://github.com/OpenZeppelin/openzeppelin-contracts/blob/master/contracts/access/Ownable.sol"; | |
contract MyToken is ERC721, ERC721Enumerable, ERC2981, Ownable { | |
string public contractURI; | |
constructor(uint256 _royaltyFeesInBips, string memory _contractURI) ERC721("MyToken", "MTK") { | |
setRoyaltyInfo(owner(), _royaltyFeesInBips); | |
contractURI = _contractURI; | |
} | |
function safeMint(address to, uint256 tokenId) public onlyOwner { | |
_safeMint(to, tokenId); | |
} | |
function setRoyaltyInfo(address _receiver, uint96 _royaltyFeesInBips) public onlyOwner { | |
_setDefaultRoyalty(_receiver, _royaltyFeesInBips); | |
} | |
function setContractURI(string calldata _contractURI) public onlyOwner { | |
contractURI = _contractURI; | |
} | |
// The following functions are overrides required by Solidity. | |
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, ERC2981) | |
returns (bool) | |
{ | |
return super.supportsInterface(interfaceId); | |
} | |
} |
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I am using the first file ERC2981NFTCustom.sol. This is still valid but please help if you can fix this error.
![01](https://user-images.githubusercontent.com/137525122/248311004-137d487d-f6d8-4e1f-aef9-4c0fc25e1c53.jpg)