Contract Source Code:
File 1 of 1 : SupeRare
pragma solidity ^0.4.18;
/**
* @title ERC721 interface
* @dev see https://github.com/ethereum/eips/issues/721
*/
contract ERC721 {
event Transfer(address indexed _from, address indexed _to, uint256 _tokenId);
event Approval(address indexed _owner, address indexed _approved, uint256 _tokenId);
function balanceOf(address _owner) public view returns (uint256 _balance);
function ownerOf(uint256 _tokenId) public view returns (address _owner);
function transfer(address _to, uint256 _tokenId) public;
function approve(address _to, uint256 _tokenId) public;
function takeOwnership(uint256 _tokenId) public;
}
/**
* @title SafeMath
* @dev Math operations with safety checks that throw on error
*/
library SafeMath {
/**
* @dev Multiplies two numbers, throws on overflow.
*/
function mul(uint256 a, uint256 b) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
uint256 c = a * b;
assert(c / a == b);
return c;
}
/**
* @dev Integer division of two numbers, truncating the quotient.
*/
function div(uint256 a, uint256 b) internal pure returns (uint256) {
// assert(b > 0); // Solidity automatically throws when dividing by 0
uint256 c = a / b;
// assert(a == b * c + a % b); // There is no case in which this doesn't hold
return c;
}
/**
* @dev Substracts two numbers, throws on overflow (i.e. if subtrahend is greater than minuend).
*/
function sub(uint256 a, uint256 b) internal pure returns (uint256) {
assert(b <= a);
return a - b;
}
/**
* @dev Adds two numbers, throws on overflow.
*/
function add(uint256 a, uint256 b) internal pure returns (uint256) {
uint256 c = a + b;
assert(c >= a);
return c;
}
}
/**
* @title ERC721Token
* Generic implementation for the required functionality of the ERC721 standard
*/
contract ERC721Token is ERC721 {
using SafeMath for uint256;
// Total amount of tokens
uint256 private totalTokens;
// Mapping from token ID to owner
mapping (uint256 => address) private tokenOwner;
// Mapping from token ID to approved address
mapping (uint256 => address) private tokenApprovals;
// Mapping from owner to list of owned token IDs
mapping (address => uint256[]) private ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) private ownedTokensIndex;
/**
* @dev Guarantees msg.sender is owner of the given token
* @param _tokenId uint256 ID of the token to validate its ownership belongs to msg.sender
*/
modifier onlyOwnerOf(uint256 _tokenId) {
require(ownerOf(_tokenId) == msg.sender);
_;
}
/**
* @dev Gets the total amount of tokens stored by the contract
* @return uint256 representing the total amount of tokens
*/
function totalSupply() public view returns (uint256) {
return totalTokens;
}
/**
* @dev Gets the balance of the specified address
* @param _owner address to query the balance of
* @return uint256 representing the amount owned by the passed address
*/
function balanceOf(address _owner) public view returns (uint256) {
return ownedTokens[_owner].length;
}
/**
* @dev Gets the list of tokens owned by a given address
* @param _owner address to query the tokens of
* @return uint256[] representing the list of tokens owned by the passed address
*/
function tokensOf(address _owner) public view returns (uint256[]) {
return ownedTokens[_owner];
}
/**
* @dev Gets the owner of the specified token ID
* @param _tokenId uint256 ID of the token to query the owner of
* @return owner address currently marked as the owner of the given token ID
*/
function ownerOf(uint256 _tokenId) public view returns (address) {
address owner = tokenOwner[_tokenId];
require(owner != address(0));
return owner;
}
/**
* @dev Gets the approved address to take ownership of a given token ID
* @param _tokenId uint256 ID of the token to query the approval of
* @return address currently approved to take ownership of the given token ID
*/
function approvedFor(uint256 _tokenId) public view returns (address) {
return tokenApprovals[_tokenId];
}
/**
* @dev Transfers the ownership of a given token ID to another address
* @param _to address to receive the ownership of the given token ID
* @param _tokenId uint256 ID of the token to be transferred
*/
function transfer(address _to, uint256 _tokenId) public onlyOwnerOf(_tokenId) {
clearApprovalAndTransfer(msg.sender, _to, _tokenId);
}
/**
* @dev Approves another address to claim for the ownership of the given token ID
* @param _to address to be approved for the given token ID
* @param _tokenId uint256 ID of the token to be approved
*/
function approve(address _to, uint256 _tokenId) public onlyOwnerOf(_tokenId) {
address owner = ownerOf(_tokenId);
require(_to != owner);
if (approvedFor(_tokenId) != 0 || _to != 0) {
tokenApprovals[_tokenId] = _to;
Approval(owner, _to, _tokenId);
}
}
/**
* @dev Claims the ownership of a given token ID
* @param _tokenId uint256 ID of the token being claimed by the msg.sender
*/
function takeOwnership(uint256 _tokenId) public {
require(isApprovedFor(msg.sender, _tokenId));
clearApprovalAndTransfer(ownerOf(_tokenId), msg.sender, _tokenId);
}
/**
* @dev Mint token function
* @param _to The address that will own the minted token
* @param _tokenId uint256 ID of the token to be minted by the msg.sender
*/
function _mint(address _to, uint256 _tokenId) internal {
require(_to != address(0));
addToken(_to, _tokenId);
Transfer(0x0, _to, _tokenId);
}
/**
* @dev Burns a specific token
* @param _tokenId uint256 ID of the token being burned by the msg.sender
*/
function _burn(uint256 _tokenId) onlyOwnerOf(_tokenId) internal {
if (approvedFor(_tokenId) != 0) {
clearApproval(msg.sender, _tokenId);
}
removeToken(msg.sender, _tokenId);
Transfer(msg.sender, 0x0, _tokenId);
}
/**
* @dev Tells whether the msg.sender is approved for the given token ID or not
* This function is not private so it can be extended in further implementations like the operatable ERC721
* @param _owner address of the owner to query the approval of
* @param _tokenId uint256 ID of the token to query the approval of
* @return bool whether the msg.sender is approved for the given token ID or not
*/
function isApprovedFor(address _owner, uint256 _tokenId) internal view returns (bool) {
return approvedFor(_tokenId) == _owner;
}
/**
* @dev Internal function to clear current approval and transfer the ownership of a given token ID
* @param _from address which you want to send tokens from
* @param _to address which you want to transfer the token to
* @param _tokenId uint256 ID of the token to be transferred
*/
function clearApprovalAndTransfer(address _from, address _to, uint256 _tokenId) internal {
require(_to != address(0));
require(_to != ownerOf(_tokenId));
require(ownerOf(_tokenId) == _from);
clearApproval(_from, _tokenId);
removeToken(_from, _tokenId);
addToken(_to, _tokenId);
Transfer(_from, _to, _tokenId);
}
/**
* @dev Internal function to clear current approval of a given token ID
* @param _tokenId uint256 ID of the token to be transferred
*/
function clearApproval(address _owner, uint256 _tokenId) private {
require(ownerOf(_tokenId) == _owner);
tokenApprovals[_tokenId] = 0;
Approval(_owner, 0, _tokenId);
}
/**
* @dev Internal function to add a token ID to the list of a given address
* @param _to address representing the new owner of the given token ID
* @param _tokenId uint256 ID of the token to be added to the tokens list of the given address
*/
function addToken(address _to, uint256 _tokenId) private {
require(tokenOwner[_tokenId] == address(0));
tokenOwner[_tokenId] = _to;
uint256 length = balanceOf(_to);
ownedTokens[_to].push(_tokenId);
ownedTokensIndex[_tokenId] = length;
totalTokens = totalTokens.add(1);
}
/**
* @dev Internal function to remove a token ID from the list of a given address
* @param _from address representing the previous owner of the given token ID
* @param _tokenId uint256 ID of the token to be removed from the tokens list of the given address
*/
function removeToken(address _from, uint256 _tokenId) private {
require(ownerOf(_tokenId) == _from);
uint256 tokenIndex = ownedTokensIndex[_tokenId];
uint256 lastTokenIndex = balanceOf(_from).sub(1);
uint256 lastToken = ownedTokens[_from][lastTokenIndex];
tokenOwner[_tokenId] = 0;
ownedTokens[_from][tokenIndex] = lastToken;
ownedTokens[_from][lastTokenIndex] = 0;
// Note that this will handle single-element arrays. In that case, both tokenIndex and lastTokenIndex are going to
// be zero. Then we can make sure that we will remove _tokenId from the ownedTokens list since we are first swapping
// the lastToken to the first position, and then dropping the element placed in the last position of the list
ownedTokens[_from].length--;
ownedTokensIndex[_tokenId] = 0;
ownedTokensIndex[lastToken] = tokenIndex;
totalTokens = totalTokens.sub(1);
}
}
/**
* @title Ownable
* @dev The Ownable contract has an owner address, and provides basic authorization control
* functions, this simplifies the implementation of "user permissions".
*/
contract Ownable {
address public owner;
event OwnershipTransferred(address indexed previousOwner, address indexed newOwner);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
function Ownable() public {
owner = msg.sender;
}
/**
* @dev Throws if called by any account other than the owner.
*/
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
/**
* @dev Allows the current owner to transfer control of the contract to a newOwner.
* @param newOwner The address to transfer ownership to.
*/
function transferOwnership(address newOwner) public onlyOwner {
require(newOwner != address(0));
OwnershipTransferred(owner, newOwner);
owner = newOwner;
}
}
/// @title ERC-721 Non-Fungible Token Standard, optional metadata extension
/// @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
/// Note: the ERC-165 identifier for this interface is 0x5b5e139f
interface ERC721Metadata /* is ERC721 */ {
/// @notice A descriptive name for a collection of NFTs in this contract
function name() external pure returns (string _name);
/// @notice An abbreviated name for NFTs in this contract
function symbol() external pure returns (string _symbol);
/// @notice A distinct Uniform Resource Identifier (URI) for a given asset.
/// @dev Throws if `_tokenId` is not a valid NFT. URIs are defined in RFC
/// 3986. The URI may point to a JSON file that conforms to the "ERC721
/// Metadata JSON Schema".
function tokenURI(uint256 _tokenId) external view returns (string);
}
contract SupeRare is ERC721Token, Ownable, ERC721Metadata {
using SafeMath for uint256;
// Percentage to owner of SupeRare. (* 10) to allow for < 1%
uint256 public maintainerPercentage = 30;
// Percentage to creator of artwork. (* 10) to allow for tens decimal.
uint256 public creatorPercentage = 100;
// Mapping from token ID to the address bidding
mapping(uint256 => address) private tokenBidder;
// Mapping from token ID to the current bid amount
mapping(uint256 => uint256) private tokenCurrentBid;
// Mapping from token ID to the owner sale price
mapping(uint256 => uint256) private tokenSalePrice;
// Mapping from token ID to the creator's address
mapping(uint256 => address) private tokenCreator;
// Mapping from token ID to the metadata uri
mapping(uint256 => string) private tokenToURI;
// Mapping from metadata uri to the token ID
mapping(string => uint256) private uriOriginalToken;
// Mapping from token ID to whether the token has been sold before.
mapping(uint256 => bool) private tokenSold;
// Mapping of address to boolean indicating whether the add
mapping(address => bool) private creatorWhitelist;
event WhitelistCreator(address indexed _creator);
event Bid(address indexed _bidder, uint256 indexed _amount, uint256 indexed _tokenId);
event AcceptBid(address indexed _bidder, address indexed _seller, uint256 _amount, uint256 indexed _tokenId);
event CancelBid(address indexed _bidder, uint256 indexed _amount, uint256 indexed _tokenId);
event Sold(address indexed _buyer, address indexed _seller, uint256 _amount, uint256 indexed _tokenId);
event SalePriceSet(uint256 indexed _tokenId, uint256 indexed _price);
/**
* @dev Guarantees _uri has not been used with a token already
* @param _uri string of the metadata uri associated with the token
*/
modifier uniqueURI(string _uri) {
require(uriOriginalToken[_uri] == 0);
_;
}
/**
* @dev Guarantees msg.sender is not the owner of the given token
* @param _tokenId uint256 ID of the token to validate its ownership does not belongs to msg.sender
*/
modifier notOwnerOf(uint256 _tokenId) {
require(ownerOf(_tokenId) != msg.sender);
_;
}
/**
* @dev Guarantees msg.sender is a whitelisted creator of SupeRare
*/
modifier onlyCreator() {
require(creatorWhitelist[msg.sender] == true);
_;
}
/**
* @dev Transfers the ownership of a given token ID to another address.
* Sets the token to be on its second sale.
* @param _to address to receive the ownership of the given token ID
* @param _tokenId uint256 ID of the token to be transferred
*/
function transfer(address _to, uint256 _tokenId) public onlyOwnerOf(_tokenId) {
tokenSold[_tokenId] = true;
tokenSalePrice[_tokenId] = 0;
clearApprovalAndTransfer(msg.sender, _to, _tokenId);
}
/**
* @dev Adds a new unique token to the supply
* @param _uri string metadata uri associated with the token
*/
function addNewToken(string _uri) public uniqueURI(_uri) onlyCreator {
uint256 newId = createToken(_uri, msg.sender);
uriOriginalToken[_uri] = newId;
}
/**
* @dev Adds a new unique token to the supply with N editions. The sale price is set for all editions
* @param _uri string metadata uri associated with the token.
* @param _editions uint256 number of editions to create.
* @param _salePrice uint256 wei price of editions.
*/
function addNewTokenWithEditions(string _uri, uint256 _editions, uint256 _salePrice) public uniqueURI(_uri) onlyCreator {
uint256 originalId = createToken(_uri, msg.sender);
uriOriginalToken[_uri] = originalId;
for (uint256 i=0; i<_editions; i++){
uint256 newId = createToken(_uri, msg.sender);
tokenSalePrice[newId] = _salePrice;
SalePriceSet(newId, _salePrice);
}
}
/**
* @dev Bids on the token, replacing the bid if the bid is higher than the current bid. You cannot bid on a token you already own.
* @param _tokenId uint256 ID of the token to bid on
*/
function bid(uint256 _tokenId) public payable notOwnerOf(_tokenId) {
require(isGreaterBid(_tokenId));
returnCurrentBid(_tokenId);
tokenBidder[_tokenId] = msg.sender;
tokenCurrentBid[_tokenId] = msg.value;
Bid(msg.sender, msg.value, _tokenId);
}
/**
* @dev Accept the bid on the token, transferring ownership to the current bidder and paying out the owner.
* @param _tokenId uint256 ID of the token with the standing bid
*/
function acceptBid(uint256 _tokenId) public onlyOwnerOf(_tokenId) {
uint256 currentBid = tokenCurrentBid[_tokenId];
address currentBidder = tokenBidder[_tokenId];
address tokenOwner = ownerOf(_tokenId);
address creator = tokenCreator[_tokenId];
clearApprovalAndTransfer(msg.sender, currentBidder, _tokenId);
payout(currentBid, owner, creator, tokenOwner, _tokenId);
clearBid(_tokenId);
AcceptBid(currentBidder, tokenOwner, currentBid, _tokenId);
tokenSalePrice[_tokenId] = 0;
}
/**
* @dev Cancels the bid on the token, returning the bid amount to the bidder.
* @param _tokenId uint256 ID of the token with a bid
*/
function cancelBid(uint256 _tokenId) public {
address bidder = tokenBidder[_tokenId];
require(msg.sender == bidder);
uint256 bidAmount = tokenCurrentBid[_tokenId];
msg.sender.transfer(bidAmount);
clearBid(_tokenId);
CancelBid(bidder, bidAmount, _tokenId);
}
/**
* @dev Purchase the token if there is a sale price; transfers ownership to buyer and pays out owner.
* @param _tokenId uint256 ID of the token to be purchased
*/
function buy(uint256 _tokenId) public payable notOwnerOf(_tokenId) {
uint256 salePrice = tokenSalePrice[_tokenId];
uint256 sentPrice = msg.value;
address buyer = msg.sender;
address tokenOwner = ownerOf(_tokenId);
address creator = tokenCreator[_tokenId];
require(salePrice > 0);
require(sentPrice >= salePrice);
returnCurrentBid(_tokenId);
clearBid(_tokenId);
clearApprovalAndTransfer(tokenOwner, buyer, _tokenId);
payout(sentPrice, owner, creator, tokenOwner, _tokenId);
tokenSalePrice[_tokenId] = 0;
Sold(buyer, tokenOwner, sentPrice, _tokenId);
}
/**
* @dev Set the sale price of the token
* @param _tokenId uint256 ID of the token with the standing bid
*/
function setSalePrice(uint256 _tokenId, uint256 _salePrice) public onlyOwnerOf(_tokenId) {
uint256 currentBid = tokenCurrentBid[_tokenId];
require(_salePrice > currentBid);
tokenSalePrice[_tokenId] = _salePrice;
SalePriceSet(_tokenId, _salePrice);
}
/**
* @dev Adds the provided address to the whitelist of creators
* @param _creator address to be added to the whitelist
*/
function whitelistCreator(address _creator) public onlyOwner {
creatorWhitelist[_creator] = true;
WhitelistCreator(_creator);
}
/**
* @dev Set the maintainer Percentage. Needs to be 10 * target percentage
* @param _percentage uint256 percentage * 10.
*/
function setMaintainerPercentage(uint256 _percentage) public onlyOwner() {
maintainerPercentage = _percentage;
}
/**
* @dev Set the creator Percentage. Needs to be 10 * target percentage
* @param _percentage uint256 percentage * 10.
*/
function setCreatorPercentage(uint256 _percentage) public onlyOwner() {
creatorPercentage = _percentage;
}
/**
* @notice A descriptive name for a collection of NFTs in this contract
*/
function name() external pure returns (string _name) {
return 'SupeRare';
}
/**
* @notice An abbreviated name for NFTs in this contract
*/
function symbol() external pure returns (string _symbol) {
return 'SUPR';
}
/**
* @notice approve is not a supported function for this contract
*/
function approve(address _to, uint256 _tokenId) public {
revert();
}
/**
* @dev Returns whether the creator is whitelisted
* @param _creator address to check
* @return bool
*/
function isWhitelisted(address _creator) external view returns (bool) {
return creatorWhitelist[_creator];
}
/**
* @notice A distinct Uniform Resource Identifier (URI) for a given asset.
* @dev Throws if `_tokenId` is not a valid NFT. URIs are defined in RFC
* 3986. The URI may point to a JSON file that conforms to the "ERC721
* Metadata JSON Schema".
*/
function tokenURI(uint256 _tokenId) external view returns (string) {
ownerOf(_tokenId);
return tokenToURI[_tokenId];
}
/**
* @dev Gets the specified token ID of the uri. It only
* returns ids of originals.
* Throw if not connected to a token ID.
* @param _uri string uri of metadata
* @return uint256 token ID
*/
function originalTokenOfUri(string _uri) public view returns (uint256) {
uint256 tokenId = uriOriginalToken[_uri];
ownerOf(tokenId);
return tokenId;
}
/**
* @dev Gets the current bid and bidder of the token
* @param _tokenId uint256 ID of the token to get bid details
* @return bid amount and bidder address of token
*/
function currentBidDetailsOfToken(uint256 _tokenId) public view returns (uint256, address) {
return (tokenCurrentBid[_tokenId], tokenBidder[_tokenId]);
}
/**
* @dev Gets the creator of the token
* @param _tokenId uint256 ID of the token
* @return address of the creator
*/
function creatorOfToken(uint256 _tokenId) public view returns (address) {
return tokenCreator[_tokenId];
}
/**
* @dev Gets the sale price of the token
* @param _tokenId uint256 ID of the token
* @return sale price of the token
*/
function salePriceOfToken(uint256 _tokenId) public view returns (uint256) {
return tokenSalePrice[_tokenId];
}
/**
* @dev Internal function to return funds to current bidder.
* @param _tokenId uint256 ID of the token with the standing bid
*/
function returnCurrentBid(uint256 _tokenId) private {
uint256 currentBid = tokenCurrentBid[_tokenId];
address currentBidder = tokenBidder[_tokenId];
if(currentBidder != address(0)) {
currentBidder.transfer(currentBid);
}
}
/**
* @dev Internal function to check that the bid is larger than current bid
* @param _tokenId uint256 ID of the token with the standing bid
*/
function isGreaterBid(uint256 _tokenId) private view returns (bool) {
return msg.value > tokenCurrentBid[_tokenId];
}
/**
* @dev Internal function to clear bid
* @param _tokenId uint256 ID of the token with the standing bid
*/
function clearBid(uint256 _tokenId) private {
tokenBidder[_tokenId] = address(0);
tokenCurrentBid[_tokenId] = 0;
}
/**
* @dev Internal function to pay the bidder, creator, and maintainer
* @param _val uint256 value to be split
* @param _maintainer address of account maintaining SupeRare
* @param _creator address of the creator of token
* @param _maintainer address of the owner of token
*/
function payout(uint256 _val, address _maintainer, address _creator, address _tokenOwner, uint256 _tokenId) private {
uint256 maintainerPayment;
uint256 creatorPayment;
uint256 ownerPayment;
if (tokenSold[_tokenId]) {
maintainerPayment = _val.mul(maintainerPercentage).div(1000);
creatorPayment = _val.mul(creatorPercentage).div(1000);
ownerPayment = _val.sub(creatorPayment).sub(maintainerPayment);
} else {
maintainerPayment = 0;
creatorPayment = _val;
ownerPayment = 0;
tokenSold[_tokenId] = true;
}
_maintainer.transfer(maintainerPayment);
_creator.transfer(creatorPayment);
_tokenOwner.transfer(ownerPayment);
}
/**
* @dev Internal function creating a new token.
* @param _uri string metadata uri associated with the token
*/
function createToken(string _uri, address _creator) private returns (uint256){
uint256 newId = totalSupply() + 1;
_mint(_creator, newId);
tokenCreator[newId] = _creator;
tokenToURI[newId] = _uri;
return newId;
}
}