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Private Name Tags
ContractCreator
TokenTracker
ENS NIFTY (ENS-NFT)Latest 25 from a total of 189 transactions
| Transaction Hash |
Method
|
Block
|
From
|
To
|
|||||
|---|---|---|---|---|---|---|---|---|---|
| Set Approval For... | 16734884 | 714 days ago | IN | 0 ETH | 0.00329924 | ||||
| Transfer From | 13256751 | 1242 days ago | IN | 0 ETH | 0.00397102 | ||||
| Transfer From | 12322575 | 1387 days ago | IN | 0 ETH | 0.00461336 | ||||
| Burn | 8923272 | 1919 days ago | IN | 0 ETH | 0.00013784 | ||||
| Burn | 8923272 | 1919 days ago | IN | 0 ETH | 0.00020628 | ||||
| Burn | 8923262 | 1919 days ago | IN | 0 ETH | 0.00018378 | ||||
| Burn | 8922202 | 1919 days ago | IN | 0 ETH | 0.00018378 | ||||
| Burn | 8916814 | 1920 days ago | IN | 0 ETH | 0.00061263 | ||||
| Burn | 8916811 | 1920 days ago | IN | 0 ETH | 0.00061263 | ||||
| Burn | 8916805 | 1920 days ago | IN | 0 ETH | 0.00061231 | ||||
| Burn | 8916804 | 1920 days ago | IN | 0 ETH | 0.00024229 | ||||
| Burn | 8916803 | 1920 days ago | IN | 0 ETH | 0.00061263 | ||||
| Burn | 8916803 | 1920 days ago | IN | 0 ETH | 0.00024165 | ||||
| Burn | 8916803 | 1920 days ago | IN | 0 ETH | 0.00024165 | ||||
| Burn | 8916803 | 1920 days ago | IN | 0 ETH | 0.00061231 | ||||
| Burn | 8916803 | 1920 days ago | IN | 0 ETH | 0.00006126 | ||||
| Burn | 8916787 | 1920 days ago | IN | 0 ETH | 0.00006126 | ||||
| Burn | 8916784 | 1920 days ago | IN | 0 ETH | 0.00006126 | ||||
| Burn | 8916720 | 1920 days ago | IN | 0 ETH | 0.00061263 | ||||
| Burn | 8529066 | 1981 days ago | IN | 0 ETH | 0.00073515 | ||||
| Burn | 8529063 | 1981 days ago | IN | 0 ETH | 0.00073515 | ||||
| Burn | 8528983 | 1981 days ago | IN | 0 ETH | 0.00103096 | ||||
| Burn | 8081559 | 2051 days ago | IN | 0 ETH | 0.00024505 | ||||
| Mint | 8013437 | 2061 days ago | IN | 0 ETH | 0.00059711 | ||||
| Burn | 8013031 | 2061 days ago | IN | 0 ETH | 0.00006876 |
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Contract Source Code Verified (Exact Match)
Contract Name:
ENSNFT
Compiler Version
v0.4.25+commit.59dbf8f1
Optimization Enabled:
No with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity)
/**
*Submitted for verification at Etherscan.io on 2018-10-15
*/
pragma solidity ^0.4.24;
// File: zeppelin-solidity/contracts/ownership/Ownable.sol
/**
* @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 OwnershipRenounced(address indexed previousOwner);
event OwnershipTransferred(
address indexed previousOwner,
address indexed newOwner
);
/**
* @dev The Ownable constructor sets the original `owner` of the contract to the sender
* account.
*/
constructor() 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 relinquish control of the contract.
* @notice Renouncing to ownership will leave the contract without an owner.
* It will not be possible to call the functions with the `onlyOwner`
* modifier anymore.
*/
function renounceOwnership() public onlyOwner {
emit OwnershipRenounced(owner);
owner = address(0);
}
/**
* @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 {
_transferOwnership(_newOwner);
}
/**
* @dev Transfers control of the contract to a newOwner.
* @param _newOwner The address to transfer ownership to.
*/
function _transferOwnership(address _newOwner) internal {
require(_newOwner != address(0));
emit OwnershipTransferred(owner, _newOwner);
owner = _newOwner;
}
}
// File: zeppelin-solidity/contracts/introspection/ERC165.sol
/**
* @title ERC165
* @dev https://github.com/ethereum/EIPs/blob/master/EIPS/eip-165.md
*/
interface ERC165 {
/**
* @notice Query if a contract implements an interface
* @param _interfaceId The interface identifier, as specified in ERC-165
* @dev Interface identification is specified in ERC-165. This function
* uses less than 30,000 gas.
*/
function supportsInterface(bytes4 _interfaceId)
external
view
returns (bool);
}
// File: zeppelin-solidity/contracts/token/ERC721/ERC721Basic.sol
/**
* @title ERC721 Non-Fungible Token Standard basic interface
* @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
*/
contract ERC721Basic is ERC165 {
bytes4 internal constant InterfaceId_ERC721 = 0x80ac58cd;
/*
* 0x80ac58cd ===
* bytes4(keccak256('balanceOf(address)')) ^
* bytes4(keccak256('ownerOf(uint256)')) ^
* bytes4(keccak256('approve(address,uint256)')) ^
* bytes4(keccak256('getApproved(uint256)')) ^
* bytes4(keccak256('setApprovalForAll(address,bool)')) ^
* bytes4(keccak256('isApprovedForAll(address,address)')) ^
* bytes4(keccak256('transferFrom(address,address,uint256)')) ^
* bytes4(keccak256('safeTransferFrom(address,address,uint256)')) ^
* bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)'))
*/
bytes4 internal constant InterfaceId_ERC721Exists = 0x4f558e79;
/*
* 0x4f558e79 ===
* bytes4(keccak256('exists(uint256)'))
*/
bytes4 internal constant InterfaceId_ERC721Enumerable = 0x780e9d63;
/**
* 0x780e9d63 ===
* bytes4(keccak256('totalSupply()')) ^
* bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) ^
* bytes4(keccak256('tokenByIndex(uint256)'))
*/
bytes4 internal constant InterfaceId_ERC721Metadata = 0x5b5e139f;
/**
* 0x5b5e139f ===
* bytes4(keccak256('name()')) ^
* bytes4(keccak256('symbol()')) ^
* bytes4(keccak256('tokenURI(uint256)'))
*/
event Transfer(
address indexed _from,
address indexed _to,
uint256 indexed _tokenId
);
event Approval(
address indexed _owner,
address indexed _approved,
uint256 indexed _tokenId
);
event ApprovalForAll(
address indexed _owner,
address indexed _operator,
bool _approved
);
function balanceOf(address _owner) public view returns (uint256 _balance);
function ownerOf(uint256 _tokenId) public view returns (address _owner);
function exists(uint256 _tokenId) public view returns (bool _exists);
function approve(address _to, uint256 _tokenId) public;
function getApproved(uint256 _tokenId)
public view returns (address _operator);
function setApprovalForAll(address _operator, bool _approved) public;
function isApprovedForAll(address _owner, address _operator)
public view returns (bool);
function transferFrom(address _from, address _to, uint256 _tokenId) public;
function safeTransferFrom(address _from, address _to, uint256 _tokenId)
public;
function safeTransferFrom(
address _from,
address _to,
uint256 _tokenId,
bytes _data
)
public;
}
// File: zeppelin-solidity/contracts/token/ERC721/ERC721.sol
/**
* @title ERC-721 Non-Fungible Token Standard, optional enumeration extension
* @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
*/
contract ERC721Enumerable is ERC721Basic {
function totalSupply() public view returns (uint256);
function tokenOfOwnerByIndex(
address _owner,
uint256 _index
)
public
view
returns (uint256 _tokenId);
function tokenByIndex(uint256 _index) public view returns (uint256);
}
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
*/
contract ERC721Metadata is ERC721Basic {
function name() external view returns (string _name);
function symbol() external view returns (string _symbol);
function tokenURI(uint256 _tokenId) public view returns (string);
}
/**
* @title ERC-721 Non-Fungible Token Standard, full implementation interface
* @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
*/
contract ERC721 is ERC721Basic, ERC721Enumerable, ERC721Metadata {
}
// File: zeppelin-solidity/contracts/token/ERC721/ERC721Receiver.sol
/**
* @title ERC721 token receiver interface
* @dev Interface for any contract that wants to support safeTransfers
* from ERC721 asset contracts.
*/
contract ERC721Receiver {
/**
* @dev Magic value to be returned upon successful reception of an NFT
* Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`,
* which can be also obtained as `ERC721Receiver(0).onERC721Received.selector`
*/
bytes4 internal constant ERC721_RECEIVED = 0x150b7a02;
/**
* @notice Handle the receipt of an NFT
* @dev The ERC721 smart contract calls this function on the recipient
* after a `safetransfer`. This function MAY throw to revert and reject the
* transfer. Return of other than the magic value MUST result in the
* transaction being reverted.
* Note: the contract address is always the message sender.
* @param _operator The address which called `safeTransferFrom` function
* @param _from The address which previously owned the token
* @param _tokenId The NFT identifier which is being transferred
* @param _data Additional data with no specified format
* @return `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
*/
function onERC721Received(
address _operator,
address _from,
uint256 _tokenId,
bytes _data
)
public
returns(bytes4);
}
// File: zeppelin-solidity/contracts/math/SafeMath.sol
/**
* @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 c) {
// Gas optimization: this is cheaper than asserting 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-solidity/pull/522
if (_a == 0) {
return 0;
}
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 _a / _b;
}
/**
* @dev Subtracts 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 c) {
c = _a + _b;
assert(c >= _a);
return c;
}
}
// File: zeppelin-solidity/contracts/AddressUtils.sol
/**
* Utility library of inline functions on addresses
*/
library AddressUtils {
/**
* Returns whether the target address is a contract
* @dev This function will return false if invoked during the constructor of a contract,
* as the code is not actually created until after the constructor finishes.
* @param _addr address to check
* @return whether the target address is a contract
*/
function isContract(address _addr) internal view returns (bool) {
uint256 size;
// XXX Currently there is no better way to check if there is a contract in an address
// than to check the size of the code at that address.
// See https://ethereum.stackexchange.com/a/14016/36603
// for more details about how this works.
// TODO Check this again before the Serenity release, because all addresses will be
// contracts then.
// solium-disable-next-line security/no-inline-assembly
assembly { size := extcodesize(_addr) }
return size > 0;
}
}
// File: zeppelin-solidity/contracts/introspection/SupportsInterfaceWithLookup.sol
/**
* @title SupportsInterfaceWithLookup
* @author Matt Condon (@shrugs)
* @dev Implements ERC165 using a lookup table.
*/
contract SupportsInterfaceWithLookup is ERC165 {
bytes4 public constant InterfaceId_ERC165 = 0x01ffc9a7;
/**
* 0x01ffc9a7 ===
* bytes4(keccak256('supportsInterface(bytes4)'))
*/
/**
* @dev a mapping of interface id to whether or not it's supported
*/
mapping(bytes4 => bool) internal supportedInterfaces;
/**
* @dev A contract implementing SupportsInterfaceWithLookup
* implement ERC165 itself
*/
constructor()
public
{
_registerInterface(InterfaceId_ERC165);
}
/**
* @dev implement supportsInterface(bytes4) using a lookup table
*/
function supportsInterface(bytes4 _interfaceId)
external
view
returns (bool)
{
return supportedInterfaces[_interfaceId];
}
/**
* @dev private method for registering an interface
*/
function _registerInterface(bytes4 _interfaceId)
internal
{
require(_interfaceId != 0xffffffff);
supportedInterfaces[_interfaceId] = true;
}
}
// File: zeppelin-solidity/contracts/token/ERC721/ERC721BasicToken.sol
/**
* @title ERC721 Non-Fungible Token Standard basic implementation
* @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
*/
contract ERC721BasicToken is SupportsInterfaceWithLookup, ERC721Basic {
using SafeMath for uint256;
using AddressUtils for address;
// Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`
// which can be also obtained as `ERC721Receiver(0).onERC721Received.selector`
bytes4 private constant ERC721_RECEIVED = 0x150b7a02;
// Mapping from token ID to owner
mapping (uint256 => address) internal tokenOwner;
// Mapping from token ID to approved address
mapping (uint256 => address) internal tokenApprovals;
// Mapping from owner to number of owned token
mapping (address => uint256) internal ownedTokensCount;
// Mapping from owner to operator approvals
mapping (address => mapping (address => bool)) internal operatorApprovals;
constructor()
public
{
// register the supported interfaces to conform to ERC721 via ERC165
_registerInterface(InterfaceId_ERC721);
_registerInterface(InterfaceId_ERC721Exists);
}
/**
* @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) {
require(_owner != address(0));
return ownedTokensCount[_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 Returns whether the specified token exists
* @param _tokenId uint256 ID of the token to query the existence of
* @return whether the token exists
*/
function exists(uint256 _tokenId) public view returns (bool) {
address owner = tokenOwner[_tokenId];
return owner != address(0);
}
/**
* @dev Approves another address to transfer the given token ID
* The zero address indicates there is no approved address.
* There can only be one approved address per token at a given time.
* Can only be called by the token owner or an approved operator.
* @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 {
address owner = ownerOf(_tokenId);
require(_to != owner);
require(msg.sender == owner || isApprovedForAll(owner, msg.sender));
tokenApprovals[_tokenId] = _to;
emit Approval(owner, _to, _tokenId);
}
/**
* @dev Gets the approved address for a token ID, or zero if no address set
* @param _tokenId uint256 ID of the token to query the approval of
* @return address currently approved for the given token ID
*/
function getApproved(uint256 _tokenId) public view returns (address) {
return tokenApprovals[_tokenId];
}
/**
* @dev Sets or unsets the approval of a given operator
* An operator is allowed to transfer all tokens of the sender on their behalf
* @param _to operator address to set the approval
* @param _approved representing the status of the approval to be set
*/
function setApprovalForAll(address _to, bool _approved) public {
require(_to != msg.sender);
operatorApprovals[msg.sender][_to] = _approved;
emit ApprovalForAll(msg.sender, _to, _approved);
}
/**
* @dev Tells whether an operator is approved by a given owner
* @param _owner owner address which you want to query the approval of
* @param _operator operator address which you want to query the approval of
* @return bool whether the given operator is approved by the given owner
*/
function isApprovedForAll(
address _owner,
address _operator
)
public
view
returns (bool)
{
return operatorApprovals[_owner][_operator];
}
/**
* @dev Transfers the ownership of a given token ID to another address
* Usage of this method is discouraged, use `safeTransferFrom` whenever possible
* Requires the msg sender to be the owner, approved, or operator
* @param _from current owner of the token
* @param _to address to receive the ownership of the given token ID
* @param _tokenId uint256 ID of the token to be transferred
*/
function transferFrom(
address _from,
address _to,
uint256 _tokenId
)
public
{
require(isApprovedOrOwner(msg.sender, _tokenId));
require(_from != address(0));
require(_to != address(0));
clearApproval(_from, _tokenId);
removeTokenFrom(_from, _tokenId);
addTokenTo(_to, _tokenId);
emit Transfer(_from, _to, _tokenId);
}
/**
* @dev Safely transfers the ownership of a given token ID to another address
* If the target address is a contract, it must implement `onERC721Received`,
* which is called upon a safe transfer, and return the magic value
* `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise,
* the transfer is reverted.
*
* Requires the msg sender to be the owner, approved, or operator
* @param _from current owner of the token
* @param _to address to receive the ownership of the given token ID
* @param _tokenId uint256 ID of the token to be transferred
*/
function safeTransferFrom(
address _from,
address _to,
uint256 _tokenId
)
public
{
// solium-disable-next-line arg-overflow
safeTransferFrom(_from, _to, _tokenId, "");
}
/**
* @dev Safely transfers the ownership of a given token ID to another address
* If the target address is a contract, it must implement `onERC721Received`,
* which is called upon a safe transfer, and return the magic value
* `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise,
* the transfer is reverted.
* Requires the msg sender to be the owner, approved, or operator
* @param _from current owner of the token
* @param _to address to receive the ownership of the given token ID
* @param _tokenId uint256 ID of the token to be transferred
* @param _data bytes data to send along with a safe transfer check
*/
function safeTransferFrom(
address _from,
address _to,
uint256 _tokenId,
bytes _data
)
public
{
transferFrom(_from, _to, _tokenId);
// solium-disable-next-line arg-overflow
require(checkAndCallSafeTransfer(_from, _to, _tokenId, _data));
}
/**
* @dev Returns whether the given spender can transfer a given token ID
* @param _spender address of the spender to query
* @param _tokenId uint256 ID of the token to be transferred
* @return bool whether the msg.sender is approved for the given token ID,
* is an operator of the owner, or is the owner of the token
*/
function isApprovedOrOwner(
address _spender,
uint256 _tokenId
)
internal
view
returns (bool)
{
address owner = ownerOf(_tokenId);
// Disable solium check because of
// https://github.com/duaraghav8/Solium/issues/175
// solium-disable-next-line operator-whitespace
return (
_spender == owner ||
getApproved(_tokenId) == _spender ||
isApprovedForAll(owner, _spender)
);
}
/**
* @dev Internal function to mint a new token
* Reverts if the given token ID already exists
* @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));
addTokenTo(_to, _tokenId);
emit Transfer(address(0), _to, _tokenId);
}
/**
* @dev Internal function to burn a specific token
* Reverts if the token does not exist
* @param _tokenId uint256 ID of the token being burned by the msg.sender
*/
function _burn(address _owner, uint256 _tokenId) internal {
clearApproval(_owner, _tokenId);
removeTokenFrom(_owner, _tokenId);
emit Transfer(_owner, address(0), _tokenId);
}
/**
* @dev Internal function to clear current approval of a given token ID
* Reverts if the given address is not indeed the owner of the token
* @param _owner owner of the token
* @param _tokenId uint256 ID of the token to be transferred
*/
function clearApproval(address _owner, uint256 _tokenId) internal {
require(ownerOf(_tokenId) == _owner);
if (tokenApprovals[_tokenId] != address(0)) {
tokenApprovals[_tokenId] = address(0);
}
}
/**
* @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 addTokenTo(address _to, uint256 _tokenId) internal {
require(tokenOwner[_tokenId] == address(0));
tokenOwner[_tokenId] = _to;
ownedTokensCount[_to] = ownedTokensCount[_to].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 removeTokenFrom(address _from, uint256 _tokenId) internal {
require(ownerOf(_tokenId) == _from);
ownedTokensCount[_from] = ownedTokensCount[_from].sub(1);
tokenOwner[_tokenId] = address(0);
}
/**
* @dev Internal function to invoke `onERC721Received` on a target address
* The call is not executed if the target address is not a contract
* @param _from address representing the previous owner of the given token ID
* @param _to target address that will receive the tokens
* @param _tokenId uint256 ID of the token to be transferred
* @param _data bytes optional data to send along with the call
* @return whether the call correctly returned the expected magic value
*/
function checkAndCallSafeTransfer(
address _from,
address _to,
uint256 _tokenId,
bytes _data
)
internal
returns (bool)
{
if (!_to.isContract()) {
return true;
}
bytes4 retval = ERC721Receiver(_to).onERC721Received(
msg.sender, _from, _tokenId, _data);
return (retval == ERC721_RECEIVED);
}
}
// File: zeppelin-solidity/contracts/token/ERC721/ERC721Token.sol
/**
* @title Full ERC721 Token
* This implementation includes all the required and some optional functionality of the ERC721 standard
* Moreover, it includes approve all functionality using operator terminology
* @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md
*/
contract ERC721Token is SupportsInterfaceWithLookup, ERC721BasicToken, ERC721 {
// Token name
string internal name_;
// Token symbol
string internal symbol_;
// Mapping from owner to list of owned token IDs
mapping(address => uint256[]) internal ownedTokens;
// Mapping from token ID to index of the owner tokens list
mapping(uint256 => uint256) internal ownedTokensIndex;
// Array with all token ids, used for enumeration
uint256[] internal allTokens;
// Mapping from token id to position in the allTokens array
mapping(uint256 => uint256) internal allTokensIndex;
// Optional mapping for token URIs
mapping(uint256 => string) internal tokenURIs;
/**
* @dev Constructor function
*/
constructor(string _name, string _symbol) public {
name_ = _name;
symbol_ = _symbol;
// register the supported interfaces to conform to ERC721 via ERC165
_registerInterface(InterfaceId_ERC721Enumerable);
_registerInterface(InterfaceId_ERC721Metadata);
}
/**
* @dev Gets the token name
* @return string representing the token name
*/
function name() external view returns (string) {
return name_;
}
/**
* @dev Gets the token symbol
* @return string representing the token symbol
*/
function symbol() external view returns (string) {
return symbol_;
}
/**
* @dev Returns an URI for a given token ID
* Throws if the token ID does not exist. May return an empty string.
* @param _tokenId uint256 ID of the token to query
*/
function tokenURI(uint256 _tokenId) public view returns (string) {
require(exists(_tokenId));
return tokenURIs[_tokenId];
}
/**
* @dev Gets the token ID at a given index of the tokens list of the requested owner
* @param _owner address owning the tokens list to be accessed
* @param _index uint256 representing the index to be accessed of the requested tokens list
* @return uint256 token ID at the given index of the tokens list owned by the requested address
*/
function tokenOfOwnerByIndex(
address _owner,
uint256 _index
)
public
view
returns (uint256)
{
require(_index < balanceOf(_owner));
return ownedTokens[_owner][_index];
}
/**
* @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 allTokens.length;
}
/**
* @dev Gets the token ID at a given index of all the tokens in this contract
* Reverts if the index is greater or equal to the total number of tokens
* @param _index uint256 representing the index to be accessed of the tokens list
* @return uint256 token ID at the given index of the tokens list
*/
function tokenByIndex(uint256 _index) public view returns (uint256) {
require(_index < totalSupply());
return allTokens[_index];
}
/**
* @dev Internal function to set the token URI for a given token
* Reverts if the token ID does not exist
* @param _tokenId uint256 ID of the token to set its URI
* @param _uri string URI to assign
*/
function _setTokenURI(uint256 _tokenId, string _uri) internal {
require(exists(_tokenId));
tokenURIs[_tokenId] = _uri;
}
/**
* @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 addTokenTo(address _to, uint256 _tokenId) internal {
super.addTokenTo(_to, _tokenId);
uint256 length = ownedTokens[_to].length;
ownedTokens[_to].push(_tokenId);
ownedTokensIndex[_tokenId] = length;
}
/**
* @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 removeTokenFrom(address _from, uint256 _tokenId) internal {
super.removeTokenFrom(_from, _tokenId);
// To prevent a gap in the array, we store the last token in the index of the token to delete, and
// then delete the last slot.
uint256 tokenIndex = ownedTokensIndex[_tokenId];
uint256 lastTokenIndex = ownedTokens[_from].length.sub(1);
uint256 lastToken = ownedTokens[_from][lastTokenIndex];
ownedTokens[_from][tokenIndex] = lastToken;
// This also deletes the contents at the last position of the array
ownedTokens[_from].length--;
// 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
ownedTokensIndex[_tokenId] = 0;
ownedTokensIndex[lastToken] = tokenIndex;
}
/**
* @dev Internal function to mint a new token
* Reverts if the given token ID already exists
* @param _to address the beneficiary 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 {
super._mint(_to, _tokenId);
allTokensIndex[_tokenId] = allTokens.length;
allTokens.push(_tokenId);
}
/**
* @dev Internal function to burn a specific token
* Reverts if the token does not exist
* @param _owner owner of the token to burn
* @param _tokenId uint256 ID of the token being burned by the msg.sender
*/
function _burn(address _owner, uint256 _tokenId) internal {
super._burn(_owner, _tokenId);
// Clear metadata (if any)
if (bytes(tokenURIs[_tokenId]).length != 0) {
delete tokenURIs[_tokenId];
}
// Reorg all tokens array
uint256 tokenIndex = allTokensIndex[_tokenId];
uint256 lastTokenIndex = allTokens.length.sub(1);
uint256 lastToken = allTokens[lastTokenIndex];
allTokens[tokenIndex] = lastToken;
allTokens[lastTokenIndex] = 0;
allTokens.length--;
allTokensIndex[_tokenId] = 0;
allTokensIndex[lastToken] = tokenIndex;
}
}
// File: contracts/helpers/strings.sol
/*
* @title String & slice utility library for Solidity contracts.
* @author Nick Johnson <[email protected]>
*
* @dev Functionality in this library is largely implemented using an
* abstraction called a 'slice'. A slice represents a part of a string -
* anything from the entire string to a single character, or even no
* characters at all (a 0-length slice). Since a slice only has to specify
* an offset and a length, copying and manipulating slices is a lot less
* expensive than copying and manipulating the strings they reference.
*
* To further reduce gas costs, most functions on slice that need to return
* a slice modify the original one instead of allocating a new one; for
* instance, `s.split(".")` will return the text up to the first '.',
* modifying s to only contain the remainder of the string after the '.'.
* In situations where you do not want to modify the original slice, you
* can make a copy first with `.copy()`, for example:
* `s.copy().split(".")`. Try and avoid using this idiom in loops; since
* Solidity has no memory management, it will result in allocating many
* short-lived slices that are later discarded.
*
* Functions that return two slices come in two versions: a non-allocating
* version that takes the second slice as an argument, modifying it in
* place, and an allocating version that allocates and returns the second
* slice; see `nextRune` for example.
*
* Functions that have to copy string data will return strings rather than
* slices; these can be cast back to slices for further processing if
* required.
*
* For convenience, some functions are provided with non-modifying
* variants that create a new slice and return both; for instance,
* `s.splitNew('.')` leaves s unmodified, and returns two values
* corresponding to the left and right parts of the string.
*/
pragma solidity ^0.4.14;
library strings {
struct slice {
uint _len;
uint _ptr;
}
function memcpy(uint dest, uint src, uint len) private {
// Copy word-length chunks while possible
for(; len >= 32; len -= 32) {
assembly {
mstore(dest, mload(src))
}
dest += 32;
src += 32;
}
// Copy remaining bytes
uint mask = 256 ** (32 - len) - 1;
assembly {
let srcpart := and(mload(src), not(mask))
let destpart := and(mload(dest), mask)
mstore(dest, or(destpart, srcpart))
}
}
/*
* @dev Returns a slice containing the entire string.
* @param self The string to make a slice from.
* @return A newly allocated slice containing the entire string.
*/
function toSlice(string self) internal returns (slice) {
uint ptr;
assembly {
ptr := add(self, 0x20)
}
return slice(bytes(self).length, ptr);
}
/*
* @dev Returns the length of a null-terminated bytes32 string.
* @param self The value to find the length of.
* @return The length of the string, from 0 to 32.
*/
function len(bytes32 self) internal returns (uint) {
uint ret;
if (self == 0)
return 0;
if (self & 0xffffffffffffffffffffffffffffffff == 0) {
ret += 16;
self = bytes32(uint(self) / 0x100000000000000000000000000000000);
}
if (self & 0xffffffffffffffff == 0) {
ret += 8;
self = bytes32(uint(self) / 0x10000000000000000);
}
if (self & 0xffffffff == 0) {
ret += 4;
self = bytes32(uint(self) / 0x100000000);
}
if (self & 0xffff == 0) {
ret += 2;
self = bytes32(uint(self) / 0x10000);
}
if (self & 0xff == 0) {
ret += 1;
}
return 32 - ret;
}
/*
* @dev Returns a slice containing the entire bytes32, interpreted as a
* null-termintaed utf-8 string.
* @param self The bytes32 value to convert to a slice.
* @return A new slice containing the value of the input argument up to the
* first null.
*/
function toSliceB32(bytes32 self) internal returns (slice ret) {
// Allocate space for `self` in memory, copy it there, and point ret at it
assembly {
let ptr := mload(0x40)
mstore(0x40, add(ptr, 0x20))
mstore(ptr, self)
mstore(add(ret, 0x20), ptr)
}
ret._len = len(self);
}
/*
* @dev Returns a new slice containing the same data as the current slice.
* @param self The slice to copy.
* @return A new slice containing the same data as `self`.
*/
function copy(slice self) internal returns (slice) {
return slice(self._len, self._ptr);
}
/*
* @dev Copies a slice to a new string.
* @param self The slice to copy.
* @return A newly allocated string containing the slice's text.
*/
function toString(slice self) internal returns (string) {
var ret = new string(self._len);
uint retptr;
assembly { retptr := add(ret, 32) }
memcpy(retptr, self._ptr, self._len);
return ret;
}
/*
* @dev Returns the length in runes of the slice. Note that this operation
* takes time proportional to the length of the slice; avoid using it
* in loops, and call `slice.empty()` if you only need to know whether
* the slice is empty or not.
* @param self The slice to operate on.
* @return The length of the slice in runes.
*/
function len(slice self) internal returns (uint l) {
// Starting at ptr-31 means the LSB will be the byte we care about
var ptr = self._ptr - 31;
var end = ptr + self._len;
for (l = 0; ptr < end; l++) {
uint8 b;
assembly { b := and(mload(ptr), 0xFF) }
if (b < 0x80) {
ptr += 1;
} else if(b < 0xE0) {
ptr += 2;
} else if(b < 0xF0) {
ptr += 3;
} else if(b < 0xF8) {
ptr += 4;
} else if(b < 0xFC) {
ptr += 5;
} else {
ptr += 6;
}
}
}
/*
* @dev Returns true if the slice is empty (has a length of 0).
* @param self The slice to operate on.
* @return True if the slice is empty, False otherwise.
*/
function empty(slice self) internal returns (bool) {
return self._len == 0;
}
/*
* @dev Returns a positive number if `other` comes lexicographically after
* `self`, a negative number if it comes before, or zero if the
* contents of the two slices are equal. Comparison is done per-rune,
* on unicode codepoints.
* @param self The first slice to compare.
* @param other The second slice to compare.
* @return The result of the comparison.
*/
function compare(slice self, slice other) internal returns (int) {
uint shortest = self._len;
if (other._len < self._len)
shortest = other._len;
var selfptr = self._ptr;
var otherptr = other._ptr;
for (uint idx = 0; idx < shortest; idx += 32) {
uint a;
uint b;
assembly {
a := mload(selfptr)
b := mload(otherptr)
}
if (a != b) {
// Mask out irrelevant bytes and check again
uint mask = ~(2 ** (8 * (32 - shortest + idx)) - 1);
var diff = (a & mask) - (b & mask);
if (diff != 0)
return int(diff);
}
selfptr += 32;
otherptr += 32;
}
return int(self._len) - int(other._len);
}
/*
* @dev Returns true if the two slices contain the same text.
* @param self The first slice to compare.
* @param self The second slice to compare.
* @return True if the slices are equal, false otherwise.
*/
function equals(slice self, slice other) internal returns (bool) {
return compare(self, other) == 0;
}
/*
* @dev Extracts the first rune in the slice into `rune`, advancing the
* slice to point to the next rune and returning `self`.
* @param self The slice to operate on.
* @param rune The slice that will contain the first rune.
* @return `rune`.
*/
function nextRune(slice self, slice rune) internal returns (slice) {
rune._ptr = self._ptr;
if (self._len == 0) {
rune._len = 0;
return rune;
}
uint leng;
uint b;
// Load the first byte of the rune into the LSBs of b
assembly { b := and(mload(sub(mload(add(self, 32)), 31)), 0xFF) }
if (b < 0x80) {
leng = 1;
} else if(b < 0xE0) {
leng = 2;
} else if(b < 0xF0) {
leng = 3;
} else {
leng = 4;
}
// Check for truncated codepoints
if (leng > self._len) {
rune._len = self._len;
self._ptr += self._len;
self._len = 0;
return rune;
}
self._ptr += leng;
self._len -= leng;
rune._len = leng;
return rune;
}
/*
* @dev Returns the first rune in the slice, advancing the slice to point
* to the next rune.
* @param self The slice to operate on.
* @return A slice containing only the first rune from `self`.
*/
function nextRune(slice self) internal returns (slice ret) {
nextRune(self, ret);
}
/*
* @dev Returns the number of the first codepoint in the slice.
* @param self The slice to operate on.
* @return The number of the first codepoint in the slice.
*/
function ord(slice self) internal returns (uint ret) {
if (self._len == 0) {
return 0;
}
uint word;
uint length;
uint divisor = 2 ** 248;
// Load the rune into the MSBs of b
assembly { word:= mload(mload(add(self, 32))) }
var b = word / divisor;
if (b < 0x80) {
ret = b;
length = 1;
} else if(b < 0xE0) {
ret = b & 0x1F;
length = 2;
} else if(b < 0xF0) {
ret = b & 0x0F;
length = 3;
} else {
ret = b & 0x07;
length = 4;
}
// Check for truncated codepoints
if (length > self._len) {
return 0;
}
for (uint i = 1; i < length; i++) {
divisor = divisor / 256;
b = (word / divisor) & 0xFF;
if (b & 0xC0 != 0x80) {
// Invalid UTF-8 sequence
return 0;
}
ret = (ret * 64) | (b & 0x3F);
}
return ret;
}
/*
* @dev Returns the keccak-256 hash of the slice.
* @param self The slice to hash.
* @return The hash of the slice.
*/
function keccak(slice self) internal returns (bytes32 ret) {
assembly {
ret := keccak256(mload(add(self, 32)), mload(self))
}
}
/*
* @dev Returns true if `self` starts with `needle`.
* @param self The slice to operate on.
* @param needle The slice to search for.
* @return True if the slice starts with the provided text, false otherwise.
*/
function startsWith(slice self, slice needle) internal returns (bool) {
if (self._len < needle._len) {
return false;
}
if (self._ptr == needle._ptr) {
return true;
}
bool equal;
assembly {
let length := mload(needle)
let selfptr := mload(add(self, 0x20))
let needleptr := mload(add(needle, 0x20))
equal := eq(keccak256(selfptr, length), keccak256(needleptr, length))
}
return equal;
}
/*
* @dev If `self` starts with `needle`, `needle` is removed from the
* beginning of `self`. Otherwise, `self` is unmodified.
* @param self The slice to operate on.
* @param needle The slice to search for.
* @return `self`
*/
function beyond(slice self, slice needle) internal returns (slice) {
if (self._len < needle._len) {
return self;
}
bool equal = true;
if (self._ptr != needle._ptr) {
assembly {
let length := mload(needle)
let selfptr := mload(add(self, 0x20))
let needleptr := mload(add(needle, 0x20))
equal := eq(sha3(selfptr, length), sha3(needleptr, length))
}
}
if (equal) {
self._len -= needle._len;
self._ptr += needle._len;
}
return self;
}
/*
* @dev Returns true if the slice ends with `needle`.
* @param self The slice to operate on.
* @param needle The slice to search for.
* @return True if the slice starts with the provided text, false otherwise.
*/
function endsWith(slice self, slice needle) internal returns (bool) {
if (self._len < needle._len) {
return false;
}
var selfptr = self._ptr + self._len - needle._len;
if (selfptr == needle._ptr) {
return true;
}
bool equal;
assembly {
let length := mload(needle)
let needleptr := mload(add(needle, 0x20))
equal := eq(keccak256(selfptr, length), keccak256(needleptr, length))
}
return equal;
}
/*
* @dev If `self` ends with `needle`, `needle` is removed from the
* end of `self`. Otherwise, `self` is unmodified.
* @param self The slice to operate on.
* @param needle The slice to search for.
* @return `self`
*/
function until(slice self, slice needle) internal returns (slice) {
if (self._len < needle._len) {
return self;
}
var selfptr = self._ptr + self._len - needle._len;
bool equal = true;
if (selfptr != needle._ptr) {
assembly {
let length := mload(needle)
let needleptr := mload(add(needle, 0x20))
equal := eq(keccak256(selfptr, length), keccak256(needleptr, length))
}
}
if (equal) {
self._len -= needle._len;
}
return self;
}
// Returns the memory address of the first byte of the first occurrence of
// `needle` in `self`, or the first byte after `self` if not found.
function findPtr(uint selflen, uint selfptr, uint needlelen, uint needleptr) private returns (uint) {
uint ptr;
uint idx;
if (needlelen <= selflen) {
if (needlelen <= 32) {
// Optimized assembly for 68 gas per byte on short strings
assembly {
let mask := not(sub(exp(2, mul(8, sub(32, needlelen))), 1))
let needledata := and(mload(needleptr), mask)
let end := add(selfptr, sub(selflen, needlelen))
ptr := selfptr
loop:
jumpi(exit, eq(and(mload(ptr), mask), needledata))
ptr := add(ptr, 1)
jumpi(loop, lt(sub(ptr, 1), end))
ptr := add(selfptr, selflen)
exit:
}
return ptr;
} else {
// For long needles, use hashing
bytes32 hash;
assembly { hash := sha3(needleptr, needlelen) }
ptr = selfptr;
for (idx = 0; idx <= selflen - needlelen; idx++) {
bytes32 testHash;
assembly { testHash := sha3(ptr, needlelen) }
if (hash == testHash)
return ptr;
ptr += 1;
}
}
}
return selfptr + selflen;
}
// Returns the memory address of the first byte after the last occurrence of
// `needle` in `self`, or the address of `self` if not found.
function rfindPtr(uint selflen, uint selfptr, uint needlelen, uint needleptr) private returns (uint) {
uint ptr;
if (needlelen <= selflen) {
if (needlelen <= 32) {
// Optimized assembly for 69 gas per byte on short strings
assembly {
let mask := not(sub(exp(2, mul(8, sub(32, needlelen))), 1))
let needledata := and(mload(needleptr), mask)
ptr := add(selfptr, sub(selflen, needlelen))
loop:
jumpi(ret, eq(and(mload(ptr), mask), needledata))
ptr := sub(ptr, 1)
jumpi(loop, gt(add(ptr, 1), selfptr))
ptr := selfptr
jump(exit)
ret:
ptr := add(ptr, needlelen)
exit:
}
return ptr;
} else {
// For long needles, use hashing
bytes32 hash;
assembly { hash := sha3(needleptr, needlelen) }
ptr = selfptr + (selflen - needlelen);
while (ptr >= selfptr) {
bytes32 testHash;
assembly { testHash := sha3(ptr, needlelen) }
if (hash == testHash)
return ptr + needlelen;
ptr -= 1;
}
}
}
return selfptr;
}
/*
* @dev Modifies `self` to contain everything from the first occurrence of
* `needle` to the end of the slice. `self` is set to the empty slice
* if `needle` is not found.
* @param self The slice to search and modify.
* @param needle The text to search for.
* @return `self`.
*/
function find(slice self, slice needle) internal returns (slice) {
uint ptr = findPtr(self._len, self._ptr, needle._len, needle._ptr);
self._len -= ptr - self._ptr;
self._ptr = ptr;
return self;
}
/*
* @dev Modifies `self` to contain the part of the string from the start of
* `self` to the end of the first occurrence of `needle`. If `needle`
* is not found, `self` is set to the empty slice.
* @param self The slice to search and modify.
* @param needle The text to search for.
* @return `self`.
*/
function rfind(slice self, slice needle) internal returns (slice) {
uint ptr = rfindPtr(self._len, self._ptr, needle._len, needle._ptr);
self._len = ptr - self._ptr;
return self;
}
/*
* @dev Splits the slice, setting `self` to everything after the first
* occurrence of `needle`, and `token` to everything before it. If
* `needle` does not occur in `self`, `self` is set to the empty slice,
* and `token` is set to the entirety of `self`.
* @param self The slice to split.
* @param needle The text to search for in `self`.
* @param token An output parameter to which the first token is written.
* @return `token`.
*/
function split(slice self, slice needle, slice token) internal returns (slice) {
uint ptr = findPtr(self._len, self._ptr, needle._len, needle._ptr);
token._ptr = self._ptr;
token._len = ptr - self._ptr;
if (ptr == self._ptr + self._len) {
// Not found
self._len = 0;
} else {
self._len -= token._len + needle._len;
self._ptr = ptr + needle._len;
}
return token;
}
/*
* @dev Splits the slice, setting `self` to everything after the first
* occurrence of `needle`, and returning everything before it. If
* `needle` does not occur in `self`, `self` is set to the empty slice,
* and the entirety of `self` is returned.
* @param self The slice to split.
* @param needle The text to search for in `self`.
* @return The part of `self` up to the first occurrence of `delim`.
*/
function split(slice self, slice needle) internal returns (slice token) {
split(self, needle, token);
}
/*
* @dev Splits the slice, setting `self` to everything before the last
* occurrence of `needle`, and `token` to everything after it. If
* `needle` does not occur in `self`, `self` is set to the empty slice,
* and `token` is set to the entirety of `self`.
* @param self The slice to split.
* @param needle The text to search for in `self`.
* @param token An output parameter to which the first token is written.
* @return `token`.
*/
function rsplit(slice self, slice needle, slice token) internal returns (slice) {
uint ptr = rfindPtr(self._len, self._ptr, needle._len, needle._ptr);
token._ptr = ptr;
token._len = self._len - (ptr - self._ptr);
if (ptr == self._ptr) {
// Not found
self._len = 0;
} else {
self._len -= token._len + needle._len;
}
return token;
}
/*
* @dev Splits the slice, setting `self` to everything before the last
* occurrence of `needle`, and returning everything after it. If
* `needle` does not occur in `self`, `self` is set to the empty slice,
* and the entirety of `self` is returned.
* @param self The slice to split.
* @param needle The text to search for in `self`.
* @return The part of `self` after the last occurrence of `delim`.
*/
function rsplit(slice self, slice needle) internal returns (slice token) {
rsplit(self, needle, token);
}
/*
* @dev Counts the number of nonoverlapping occurrences of `needle` in `self`.
* @param self The slice to search.
* @param needle The text to search for in `self`.
* @return The number of occurrences of `needle` found in `self`.
*/
function count(slice self, slice needle) internal returns (uint cnt) {
uint ptr = findPtr(self._len, self._ptr, needle._len, needle._ptr) + needle._len;
while (ptr <= self._ptr + self._len) {
cnt++;
ptr = findPtr(self._len - (ptr - self._ptr), ptr, needle._len, needle._ptr) + needle._len;
}
}
/*
* @dev Returns True if `self` contains `needle`.
* @param self The slice to search.
* @param needle The text to search for in `self`.
* @return True if `needle` is found in `self`, false otherwise.
*/
function contains(slice self, slice needle) internal returns (bool) {
return rfindPtr(self._len, self._ptr, needle._len, needle._ptr) != self._ptr;
}
/*
* @dev Returns a newly allocated string containing the concatenation of
* `self` and `other`.
* @param self The first slice to concatenate.
* @param other The second slice to concatenate.
* @return The concatenation of the two strings.
*/
function concat(slice self, slice other) internal returns (string) {
var ret = new string(self._len + other._len);
uint retptr;
assembly { retptr := add(ret, 32) }
memcpy(retptr, self._ptr, self._len);
memcpy(retptr + self._len, other._ptr, other._len);
return ret;
}
/*
* @dev Joins an array of slices, using `self` as a delimiter, returning a
* newly allocated string.
* @param self The delimiter to use.
* @param parts A list of slices to join.
* @return A newly allocated string containing all the slices in `parts`,
* joined with `self`.
*/
function join(slice self, slice[] parts) internal returns (string) {
if (parts.length == 0)
return "";
uint length = self._len * (parts.length - 1);
for(uint i = 0; i < parts.length; i++)
length += parts[i]._len;
var ret = new string(length);
uint retptr;
assembly { retptr := add(ret, 32) }
for(i = 0; i < parts.length; i++) {
memcpy(retptr, parts[i]._ptr, parts[i]._len);
retptr += parts[i]._len;
if (i < parts.length - 1) {
memcpy(retptr, self._ptr, self._len);
retptr += self._len;
}
}
return ret;
}
}
// File: contracts/Metadata.sol
/**
* Metadata contract is upgradeable and returns metadata about Token
*/
contract Metadata {
using strings for *;
function tokenURI(uint _tokenId) public view returns (string _infoUrl) {
string memory base = "https://ensnifty.com/metadata/0x";
string memory id = uint2hexstr(_tokenId);
return base.toSlice().concat(id.toSlice());
}
function uint2hexstr(uint i) internal pure returns (string) {
if (i == 0) return "0";
uint j = i;
uint length;
while (j != 0) {
length++;
j = j >> 4;
}
uint mask = 15;
bytes memory bstr = new bytes(length);
uint k = length - 1;
while (i != 0){
uint curr = (i & mask);
bstr[k--] = curr > 9 ? byte(55 + curr) : byte(48 + curr); // 55 = 65 - 10
i = i >> 4;
}
return string(bstr);
}
}
// File: @ensdomains/ens/contracts/ENS.sol
interface ENS {
// Logged when the owner of a node assigns a new owner to a subnode.
event NewOwner(bytes32 indexed node, bytes32 indexed label, address owner);
// Logged when the owner of a node transfers ownership to a new account.
event Transfer(bytes32 indexed node, address owner);
// Logged when the resolver for a node changes.
event NewResolver(bytes32 indexed node, address resolver);
// Logged when the TTL of a node changes
event NewTTL(bytes32 indexed node, uint64 ttl);
function setSubnodeOwner(bytes32 node, bytes32 label, address owner) public;
function setResolver(bytes32 node, address resolver) public;
function setOwner(bytes32 node, address owner) public;
function setTTL(bytes32 node, uint64 ttl) public;
function owner(bytes32 node) public view returns (address);
function resolver(bytes32 node) public view returns (address);
function ttl(bytes32 node) public view returns (uint64);
}
// File: @ensdomains/ens/contracts/Deed.sol
interface Deed {
function setOwner(address newOwner) public;
function setRegistrar(address newRegistrar) public;
function setBalance(uint newValue, bool throwOnFailure) public;
function closeDeed(uint refundRatio) public;
function destroyDeed() public;
function owner() public view returns (address);
function previousOwner() public view returns (address);
function value() public view returns (uint);
function creationDate() public view returns (uint);
}
// File: @ensdomains/ens/contracts/DeedImplementation.sol
/**
* @title Deed to hold ether in exchange for ownership of a node
* @dev The deed can be controlled only by the registrar and can only send ether back to the owner.
*/
contract DeedImplementation is Deed {
address constant burn = 0xdead;
address public registrar;
address public owner;
address public previousOwner;
uint public creationDate;
uint public value;
bool active;
event OwnerChanged(address newOwner);
event DeedClosed();
modifier onlyRegistrar {
require(msg.sender == registrar);
_;
}
modifier onlyActive {
require(active);
_;
}
constructor(address _owner) public payable {
owner = _owner;
registrar = msg.sender;
creationDate = now;
active = true;
value = msg.value;
}
function setOwner(address newOwner) public onlyRegistrar {
require(newOwner != 0);
previousOwner = owner; // This allows contracts to check who sent them the ownership
owner = newOwner;
emit OwnerChanged(newOwner);
}
function setRegistrar(address newRegistrar) public onlyRegistrar {
registrar = newRegistrar;
}
function setBalance(uint newValue, bool throwOnFailure) public onlyRegistrar onlyActive {
// Check if it has enough balance to set the value
require(value >= newValue);
value = newValue;
// Send the difference to the owner
require(owner.send(address(this).balance - newValue) || !throwOnFailure);
}
/**
* @dev Close a deed and refund a specified fraction of the bid value
*
* @param refundRatio The amount*1/1000 to refund
*/
function closeDeed(uint refundRatio) public onlyRegistrar onlyActive {
active = false;
require(burn.send(((1000 - refundRatio) * address(this).balance)/1000));
emit DeedClosed();
destroyDeed();
}
/**
* @dev Close a deed and refund a specified fraction of the bid value
*/
function destroyDeed() public {
require(!active);
// Instead of selfdestruct(owner), invoke owner fallback function to allow
// owner to log an event if desired; but owner should also be aware that
// its fallback function can also be invoked by setBalance
if (owner.send(address(this).balance)) {
selfdestruct(burn);
}
}
function owner() public view returns (address) {
return owner;
}
function previousOwner() public view returns (address) {
return previousOwner;
}
function value() public view returns (uint) {
return value;
}
function creationDate() public view returns (uint) {
return creationDate;
}
}
// File: @ensdomains/ens/contracts/Registrar.sol
interface Registrar {
event AuctionStarted(bytes32 indexed hash, uint registrationDate);
event NewBid(bytes32 indexed hash, address indexed bidder, uint deposit);
event BidRevealed(bytes32 indexed hash, address indexed owner, uint value, uint8 status);
event HashRegistered(bytes32 indexed hash, address indexed owner, uint value, uint registrationDate);
event HashReleased(bytes32 indexed hash, uint value);
event HashInvalidated(bytes32 indexed hash, string indexed name, uint value, uint registrationDate);
function startAuction(bytes32 _hash) public;
function startAuctions(bytes32[] _hashes) public;
function newBid(bytes32 sealedBid) public payable;
function startAuctionsAndBid(bytes32[] hashes, bytes32 sealedBid) public payable;
function unsealBid(bytes32 _hash, uint _value, bytes32 _salt) public;
function cancelBid(address bidder, bytes32 seal) public;
function finalizeAuction(bytes32 _hash) public;
function transfer(bytes32 _hash, address newOwner) public;
function releaseDeed(bytes32 _hash) public;
function invalidateName(string unhashedName) public;
function eraseNode(bytes32[] labels) public;
function transferRegistrars(bytes32 _hash) public;
function acceptRegistrarTransfer(bytes32 hash, Deed deed, uint registrationDate) public;
}
// File: @ensdomains/ens/contracts/HashRegistrar.sol
/*
Temporary Hash Registrar
========================
This is a simplified version of a hash registrar. It is purporsefully limited:
names cannot be six letters or shorter, new auctions will stop after 4 years.
The plan is to test the basic features and then move to a new contract in at most
2 years, when some sort of renewal mechanism will be enabled.
*/
/**
* @title Registrar
* @dev The registrar handles the auction process for each subnode of the node it owns.
*/
contract HashRegistrar is Registrar {
ENS public ens;
bytes32 public rootNode;
mapping (bytes32 => Entry) _entries;
mapping (address => mapping (bytes32 => Deed)) public sealedBids;
enum Mode { Open, Auction, Owned, Forbidden, Reveal, NotYetAvailable }
uint32 constant totalAuctionLength = 5 days;
uint32 constant revealPeriod = 48 hours;
uint32 public constant launchLength = 8 weeks;
uint constant minPrice = 0.01 ether;
uint public registryStarted;
struct Entry {
Deed deed;
uint registrationDate;
uint value;
uint highestBid;
}
modifier inState(bytes32 _hash, Mode _state) {
require(state(_hash) == _state);
_;
}
modifier onlyOwner(bytes32 _hash) {
require(state(_hash) == Mode.Owned && msg.sender == _entries[_hash].deed.owner());
_;
}
modifier registryOpen() {
require(now >= registryStarted && now <= registryStarted + 4 years && ens.owner(rootNode) == address(this));
_;
}
/**
* @dev Constructs a new Registrar, with the provided address as the owner of the root node.
*
* @param _ens The address of the ENS
* @param _rootNode The hash of the rootnode.
*/
constructor(ENS _ens, bytes32 _rootNode, uint _startDate) public {
ens = _ens;
rootNode = _rootNode;
registryStarted = _startDate > 0 ? _startDate : now;
}
/**
* @dev Start an auction for an available hash
*
* @param _hash The hash to start an auction on
*/
function startAuction(bytes32 _hash) public registryOpen() {
Mode mode = state(_hash);
if (mode == Mode.Auction) return;
require(mode == Mode.Open);
Entry storage newAuction = _entries[_hash];
newAuction.registrationDate = now + totalAuctionLength;
newAuction.value = 0;
newAuction.highestBid = 0;
emit AuctionStarted(_hash, newAuction.registrationDate);
}
/**
* @dev Start multiple auctions for better anonymity
*
* Anyone can start an auction by sending an array of hashes that they want to bid for.
* Arrays are sent so that someone can open up an auction for X dummy hashes when they
* are only really interested in bidding for one. This will increase the cost for an
* attacker to simply bid blindly on all new auctions. Dummy auctions that are
* open but not bid on are closed after a week.
*
* @param _hashes An array of hashes, at least one of which you presumably want to bid on
*/
function startAuctions(bytes32[] _hashes) public {
for (uint i = 0; i < _hashes.length; i ++) {
startAuction(_hashes[i]);
}
}
/**
* @dev Submit a new sealed bid on a desired hash in a blind auction
*
* Bids are sent by sending a message to the main contract with a hash and an amount. The hash
* contains information about the bid, including the bidded hash, the bid amount, and a random
* salt. Bids are not tied to any one auction until they are revealed. The value of the bid
* itself can be masqueraded by sending more than the value of your actual bid. This is
* followed by a 48h reveal period. Bids revealed after this period will be burned and the ether unrecoverable.
* Since this is an auction, it is expected that most public hashes, like known domains and common dictionary
* words, will have multiple bidders pushing the price up.
*
* @param sealedBid A sealedBid, created by the shaBid function
*/
function newBid(bytes32 sealedBid) public payable {
require(address(sealedBids[msg.sender][sealedBid]) == 0x0);
require(msg.value >= minPrice);
// Creates a new hash contract with the owner
Deed newBid = (new DeedImplementation).value(msg.value)(msg.sender);
sealedBids[msg.sender][sealedBid] = newBid;
emit NewBid(sealedBid, msg.sender, msg.value);
}
/**
* @dev Start a set of auctions and bid on one of them
*
* This method functions identically to calling `startAuctions` followed by `newBid`,
* but all in one transaction.
*
* @param hashes A list of hashes to start auctions on.
* @param sealedBid A sealed bid for one of the auctions.
*/
function startAuctionsAndBid(bytes32[] hashes, bytes32 sealedBid) public payable {
startAuctions(hashes);
newBid(sealedBid);
}
/**
* @dev Submit the properties of a bid to reveal them
*
* @param _hash The node in the sealedBid
* @param _value The bid amount in the sealedBid
* @param _salt The sale in the sealedBid
*/
function unsealBid(bytes32 _hash, uint _value, bytes32 _salt) public {
bytes32 seal = shaBid(_hash, msg.sender, _value, _salt);
Deed bid = sealedBids[msg.sender][seal];
require(address(bid) != 0);
sealedBids[msg.sender][seal] = Deed(0);
Entry storage h = _entries[_hash];
uint value = min(_value, bid.value());
bid.setBalance(value, true);
Mode auctionState = state(_hash);
if (auctionState == Mode.Owned) {
// Too late! Bidder loses their bid. Gets 0.5% back.
bid.closeDeed(5);
emit BidRevealed(_hash, msg.sender, value, 1);
} else if (auctionState != Mode.Reveal) {
// Invalid phase
revert();
} else if (value < minPrice || bid.creationDate() > h.registrationDate - revealPeriod) {
// Bid too low or too late, refund 99.5%
bid.closeDeed(995);
emit BidRevealed(_hash, msg.sender, value, 0);
} else if (value > h.highestBid) {
// New winner
// Cancel the other bid, refund 99.5%
if (address(h.deed) != 0) {
Deed previousWinner = h.deed;
previousWinner.closeDeed(995);
}
// Set new winner
// Per the rules of a vickery auction, the value becomes the previous highestBid
h.value = h.highestBid; // will be zero if there's only 1 bidder
h.highestBid = value;
h.deed = bid;
emit BidRevealed(_hash, msg.sender, value, 2);
} else if (value > h.value) {
// Not winner, but affects second place
h.value = value;
bid.closeDeed(995);
emit BidRevealed(_hash, msg.sender, value, 3);
} else {
// Bid doesn't affect auction
bid.closeDeed(995);
emit BidRevealed(_hash, msg.sender, value, 4);
}
}
/**
* @dev Cancel a bid
*
* @param seal The value returned by the shaBid function
*/
function cancelBid(address bidder, bytes32 seal) public {
Deed bid = sealedBids[bidder][seal];
// If a sole bidder does not `unsealBid` in time, they have a few more days
// where they can call `startAuction` (again) and then `unsealBid` during
// the revealPeriod to get back their bid value.
// For simplicity, they should call `startAuction` within
// 9 days (2 weeks - totalAuctionLength), otherwise their bid will be
// cancellable by anyone.
require(address(bid) != 0 && now >= bid.creationDate() + totalAuctionLength + 2 weeks);
// Send the canceller 0.5% of the bid, and burn the rest.
bid.setOwner(msg.sender);
bid.closeDeed(5);
sealedBids[bidder][seal] = Deed(0);
emit BidRevealed(seal, bidder, 0, 5);
}
/**
* @dev Finalize an auction after the registration date has passed
*
* @param _hash The hash of the name the auction is for
*/
function finalizeAuction(bytes32 _hash) public onlyOwner(_hash) {
Entry storage h = _entries[_hash];
// Handles the case when there's only a single bidder (h.value is zero)
h.value = max(h.value, minPrice);
h.deed.setBalance(h.value, true);
trySetSubnodeOwner(_hash, h.deed.owner());
emit HashRegistered(_hash, h.deed.owner(), h.value, h.registrationDate);
}
/**
* @dev The owner of a domain may transfer it to someone else at any time.
*
* @param _hash The node to transfer
* @param newOwner The address to transfer ownership to
*/
function transfer(bytes32 _hash, address newOwner) public onlyOwner(_hash) {
require(newOwner != 0);
Entry storage h = _entries[_hash];
h.deed.setOwner(newOwner);
trySetSubnodeOwner(_hash, newOwner);
}
/**
* @dev After some time, or if we're no longer the registrar, the owner can release
* the name and get their ether back.
*
* @param _hash The node to release
*/
function releaseDeed(bytes32 _hash) public onlyOwner(_hash) {
Entry storage h = _entries[_hash];
Deed deedContract = h.deed;
require(now >= h.registrationDate + 1 years || ens.owner(rootNode) != address(this));
h.value = 0;
h.highestBid = 0;
h.deed = Deed(0);
_tryEraseSingleNode(_hash);
deedContract.closeDeed(1000);
emit HashReleased(_hash, h.value);
}
/**
* @dev Submit a name 6 characters long or less. If it has been registered,
* the submitter will earn 50% of the deed value.
*
* We are purposefully handicapping the simplified registrar as a way
* to force it into being restructured in a few years.
*
* @param unhashedName An invalid name to search for in the registry.
*/
function invalidateName(string unhashedName) public inState(keccak256(unhashedName), Mode.Owned) {
require(strlen(unhashedName) <= 6);
bytes32 hash = keccak256(unhashedName);
Entry storage h = _entries[hash];
_tryEraseSingleNode(hash);
if (address(h.deed) != 0) {
// Reward the discoverer with 50% of the deed
// The previous owner gets 50%
h.value = max(h.value, minPrice);
h.deed.setBalance(h.value/2, false);
h.deed.setOwner(msg.sender);
h.deed.closeDeed(1000);
}
emit HashInvalidated(hash, unhashedName, h.value, h.registrationDate);
h.value = 0;
h.highestBid = 0;
h.deed = Deed(0);
}
/**
* @dev Allows anyone to delete the owner and resolver records for a (subdomain of) a
* name that is not currently owned in the registrar. If passing, eg, 'foo.bar.eth',
* the owner and resolver fields on 'foo.bar.eth' and 'bar.eth' will all be cleared.
*
* @param labels A series of label hashes identifying the name to zero out, rooted at the
* registrar's root. Must contain at least one element. For instance, to zero
* 'foo.bar.eth' on a registrar that owns '.eth', pass an array containing
* [keccak256('foo'), keccak256('bar')].
*/
function eraseNode(bytes32[] labels) public {
require(labels.length != 0);
require(state(labels[labels.length - 1]) != Mode.Owned);
_eraseNodeHierarchy(labels.length - 1, labels, rootNode);
}
/**
* @dev Transfers the deed to the current registrar, if different from this one.
*
* Used during the upgrade process to a permanent registrar.
*
* @param _hash The name hash to transfer.
*/
function transferRegistrars(bytes32 _hash) public onlyOwner(_hash) {
address registrar = ens.owner(rootNode);
require(registrar != address(this));
// Migrate the deed
Entry storage h = _entries[_hash];
h.deed.setRegistrar(registrar);
// Call the new registrar to accept the transfer
Registrar(registrar).acceptRegistrarTransfer(_hash, h.deed, h.registrationDate);
// Zero out the Entry
h.deed = Deed(0);
h.registrationDate = 0;
h.value = 0;
h.highestBid = 0;
}
/**
* @dev Accepts a transfer from a previous registrar; stubbed out here since there
* is no previous registrar implementing this interface.
*
* @param hash The sha3 hash of the label to transfer.
* @param deed The Deed object for the name being transferred in.
* @param registrationDate The date at which the name was originally registered.
*/
function acceptRegistrarTransfer(bytes32 hash, Deed deed, uint registrationDate) public {
hash; deed; registrationDate; // Don't warn about unused variables
}
// State transitions for names:
// Open -> Auction (startAuction)
// Auction -> Reveal
// Reveal -> Owned
// Reveal -> Open (if nobody bid)
// Owned -> Open (releaseDeed or invalidateName)
function state(bytes32 _hash) public view returns (Mode) {
Entry storage entry = _entries[_hash];
if (!isAllowed(_hash, now)) {
return Mode.NotYetAvailable;
} else if (now < entry.registrationDate) {
if (now < entry.registrationDate - revealPeriod) {
return Mode.Auction;
} else {
return Mode.Reveal;
}
} else {
if (entry.highestBid == 0) {
return Mode.Open;
} else {
return Mode.Owned;
}
}
}
function entries(bytes32 _hash) public view returns (Mode, address, uint, uint, uint) {
Entry storage h = _entries[_hash];
return (state(_hash), h.deed, h.registrationDate, h.value, h.highestBid);
}
/**
* @dev Determines if a name is available for registration yet
*
* Each name will be assigned a random date in which its auction
* can be started, from 0 to 8 weeks
*
* @param _hash The hash to start an auction on
* @param _timestamp The timestamp to query about
*/
function isAllowed(bytes32 _hash, uint _timestamp) public view returns (bool allowed) {
return _timestamp > getAllowedTime(_hash);
}
/**
* @dev Returns available date for hash
*
* The available time from the `registryStarted` for a hash is proportional
* to its numeric value.
*
* @param _hash The hash to start an auction on
*/
function getAllowedTime(bytes32 _hash) public view returns (uint) {
return registryStarted + ((launchLength * (uint(_hash) >> 128)) >> 128);
// Right shift operator: a >> b == a / 2**b
}
/**
* @dev Hash the values required for a secret bid
*
* @param hash The node corresponding to the desired namehash
* @param value The bid amount
* @param salt A random value to ensure secrecy of the bid
* @return The hash of the bid values
*/
function shaBid(bytes32 hash, address owner, uint value, bytes32 salt) public pure returns (bytes32) {
return keccak256(abi.encodePacked(hash, owner, value, salt));
}
function _tryEraseSingleNode(bytes32 label) internal {
if (ens.owner(rootNode) == address(this)) {
ens.setSubnodeOwner(rootNode, label, address(this));
bytes32 node = keccak256(abi.encodePacked(rootNode, label));
ens.setResolver(node, 0);
ens.setOwner(node, 0);
}
}
function _eraseNodeHierarchy(uint idx, bytes32[] labels, bytes32 node) internal {
// Take ownership of the node
ens.setSubnodeOwner(node, labels[idx], address(this));
node = keccak256(abi.encodePacked(node, labels[idx]));
// Recurse if there are more labels
if (idx > 0) {
_eraseNodeHierarchy(idx - 1, labels, node);
}
// Erase the resolver and owner records
ens.setResolver(node, 0);
ens.setOwner(node, 0);
}
/**
* @dev Assign the owner in ENS, if we're still the registrar
*
* @param _hash hash to change owner
* @param _newOwner new owner to transfer to
*/
function trySetSubnodeOwner(bytes32 _hash, address _newOwner) internal {
if (ens.owner(rootNode) == address(this))
ens.setSubnodeOwner(rootNode, _hash, _newOwner);
}
/**
* @dev Returns the maximum of two unsigned integers
*
* @param a A number to compare
* @param b A number to compare
* @return The maximum of two unsigned integers
*/
function max(uint a, uint b) internal pure returns (uint) {
if (a > b)
return a;
else
return b;
}
/**
* @dev Returns the minimum of two unsigned integers
*
* @param a A number to compare
* @param b A number to compare
* @return The minimum of two unsigned integers
*/
function min(uint a, uint b) internal pure returns (uint) {
if (a < b)
return a;
else
return b;
}
/**
* @dev Returns the length of a given string
*
* @param s The string to measure the length of
* @return The length of the input string
*/
function strlen(string s) internal pure returns (uint) {
s; // Don't warn about unused variables
// Starting here means the LSB will be the byte we care about
uint ptr;
uint end;
assembly {
ptr := add(s, 1)
end := add(mload(s), ptr)
}
for (uint len = 0; ptr < end; len++) {
uint8 b;
assembly { b := and(mload(ptr), 0xFF) }
if (b < 0x80) {
ptr += 1;
} else if (b < 0xE0) {
ptr += 2;
} else if (b < 0xF0) {
ptr += 3;
} else if (b < 0xF8) {
ptr += 4;
} else if (b < 0xFC) {
ptr += 5;
} else {
ptr += 6;
}
}
return len;
}
}
// File: contracts/ENSNFT.sol
/* pragma experimental ABIEncoderV2; */
contract ENSNFT is ERC721Token, Ownable {
address metadata;
HashRegistrar registrar;
constructor (string _name, string _symbol, HashRegistrar _registrar, Metadata _metadata) public
ERC721Token(_name, _symbol) {
registrar = _registrar;
metadata = _metadata;
}
function getMetadata() public view returns (address) {
return metadata;
}
// this function uses assembly to delegate a call because it returns a string
// of variable length
function tokenURI(uint _tokenId) public view returns (string _infoUrl) {
address _impl = getMetadata();
bytes memory data = msg.data;
assembly {
let result := delegatecall(gas, _impl, add(data, 0x20), mload(data), 0, 0)
let size := returndatasize
let ptr := mload(0x40)
returndatacopy(ptr, 0, size)
switch result
case 0 { revert(ptr, size) }
default { return(ptr, size) }
}
// this is how it would be done if returning a variable length were allowed outside assembly
// return Metadata(metadata).tokenMetadata(_tokenId);
}
function updateMetadata(Metadata _metadata) public onlyOwner {
metadata = _metadata;
}
function mint(bytes32 _hash) public {
address deedAddress;
(, deedAddress, , , ) = registrar.entries(_hash);
Deed deed = Deed(deedAddress);
require(deed.owner() == address(this));
require(deed.previousOwner() == msg.sender);
uint256 tokenId = uint256(_hash); // dont do math on this
_mint(msg.sender, tokenId);
}
function burn(uint256 tokenId) {
require(ownerOf(tokenId) == msg.sender);
_burn(msg.sender, tokenId);
registrar.transfer(bytes32(tokenId), msg.sender);
}
}Contract Security Audit
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Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
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
-----Decoded View---------------
Arg [0] : _name (string): ENS NIFTY
Arg [1] : _symbol (string): ENS-NFT
Arg [2] : _registrar (address): 0x6090A6e47849629b7245Dfa1Ca21D94cd15878Ef
Arg [3] : _metadata (address): 0xCA6ca4732858e2E6Ce7f5906b0ef530CB3F6E222
-----Encoded View---------------
8 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000c0
Arg [2] : 0000000000000000000000006090a6e47849629b7245dfa1ca21d94cd15878ef
Arg [3] : 000000000000000000000000ca6ca4732858e2e6ce7f5906b0ef530cb3f6e222
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000009
Arg [5] : 454e53204e494654590000000000000000000000000000000000000000000000
Arg [6] : 0000000000000000000000000000000000000000000000000000000000000007
Arg [7] : 454e532d4e465400000000000000000000000000000000000000000000000000
Swarm Source
bzzr://07a88242bccc459053638deae315ac74f5ecf7209df5f9f220c36bd1310a4c09
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OVERVIEW
Tokenize your ENS domain and trade it as an NFTMultichain Portfolio | 30 Chains
| Chain | Token | Portfolio % | Price | Amount | Value |
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.