Contract Name:
AvatarItemToken
Contract Source Code:
File 1 of 1 : AvatarItemToken
pragma solidity ^0.4.24;
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);
}
interface ERC721 /* is ERC165 */ {
/// @dev This emits when ownership of any NFT changes by any mechanism.
/// This event emits when NFTs are created (`from` == 0) and destroyed
/// (`to` == 0). Exception: during contract creation, any number of NFTs
/// may be created and assigned without emitting Transfer. At the time of
/// any transfer, the approved address for that NFT (if any) is reset to none.
event Transfer(address indexed _from, address indexed _to, uint256 indexed _tokenId);
/// @dev This emits when the approved address for an NFT is changed or
/// reaffirmed. The zero address indicates there is no approved address.
/// When a Transfer event emits, this also indicates that the approved
/// address for that NFT (if any) is reset to none.
event Approval(address indexed _owner, address indexed _approved, uint256 indexed _tokenId);
/// @dev This emits when an operator is enabled or disabled for an owner.
/// The operator can manage all NFTs of the owner.
event ApprovalForAll(address indexed _owner, address indexed _operator, bool _approved);
/// @notice Count all NFTs assigned to an owner
/// @dev NFTs assigned to the zero address are considered invalid, and this
/// function throws for queries about the zero address.
/// @param _owner An address for whom to query the balance
/// @return The number of NFTs owned by `_owner`, possibly zero
function balanceOf(address _owner) external view returns (uint256);
/// @notice Find the owner of an NFT
/// @dev NFTs assigned to zero address are considered invalid, and queries
/// about them do throw.
/// @param _tokenId The identifier for an NFT
/// @return The address of the owner of the NFT
function ownerOf(uint256 _tokenId) external view returns (address);
/// @notice Transfers the ownership of an NFT from one address to another address
/// @dev Throws unless `msg.sender` is the current owner, an authorized
/// operator, or the approved address for this NFT. Throws if `_from` is
/// not the current owner. Throws if `_to` is the zero address. Throws if
/// `_tokenId` is not a valid NFT. When transfer is complete, this function
/// checks if `_to` is a smart contract (code size > 0). If so, it calls
/// `onERC721Received` on `_to` and throws if the return value is not
/// `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`.
/// @param _from The current owner of the NFT
/// @param _to The new owner
/// @param _tokenId The NFT to transfer
/// @param data Additional data with no specified format, sent in call to `_to`
function safeTransferFrom(address _from, address _to, uint256 _tokenId, bytes data) external;
/// @notice Transfers the ownership of an NFT from one address to another address
/// @dev This works identically to the other function with an extra data parameter,
/// except this function just sets data to "".
/// @param _from The current owner of the NFT
/// @param _to The new owner
/// @param _tokenId The NFT to transfer
function safeTransferFrom(address _from, address _to, uint256 _tokenId) external;
/// @notice Transfer ownership of an NFT -- THE CALLER IS RESPONSIBLE
/// TO CONFIRM THAT `_to` IS CAPABLE OF RECEIVING NFTS OR ELSE
/// THEY MAY BE PERMANENTLY LOST
/// @dev Throws unless `msg.sender` is the current owner, an authorized
/// operator, or the approved address for this NFT. Throws if `_from` is
/// not the current owner. Throws if `_to` is the zero address. Throws if
/// `_tokenId` is not a valid NFT.
/// @param _from The current owner of the NFT
/// @param _to The new owner
/// @param _tokenId The NFT to transfer
function transferFrom(address _from, address _to, uint256 _tokenId) external;
/// @notice Change or reaffirm the approved address for an NFT
/// @dev The zero address indicates there is no approved address.
/// Throws unless `msg.sender` is the current NFT owner, or an authorized
/// operator of the current owner.
/// @param _approved The new approved NFT controller
/// @param _tokenId The NFT to approve
function approve(address _approved, uint256 _tokenId) external;
/// @notice Enable or disable approval for a third party ("operator") to manage
/// all of `msg.sender`'s assets
/// @dev Emits the ApprovalForAll event. The contract MUST allow
/// multiple operators per owner.
/// @param _operator Address to add to the set of authorized operators
/// @param _approved True if the operator is approved, false to revoke approval
function setApprovalForAll(address _operator, bool _approved) external;
/// @notice Get the approved address for a single NFT
/// @dev Throws if `_tokenId` is not a valid NFT.
/// @param _tokenId The NFT to find the approved address for
/// @return The approved address for this NFT, or the zero address if there is none
function getApproved(uint256 _tokenId) external view returns (address);
/// @notice Query if an address is an authorized operator for another address
/// @param _owner The address that owns the NFTs
/// @param _operator The address that acts on behalf of the owner
/// @return True if `_operator` is an approved operator for `_owner`, false otherwise
function isApprovedForAll(address _owner, address _operator) external view returns (bool);
}
/// Note: the ERC-165 identifier for this interface is 0x780e9d63.
interface ERC721Enumerable /* is ERC721 */ {
/// @notice Count NFTs tracked by this contract
/// @return A count of valid NFTs tracked by this contract, where each one of
/// them has an assigned and queryable owner not equal to the zero address
function totalSupply() external view returns (uint256);
/// @notice Enumerate valid NFTs
/// @dev Throws if `_index` >= `totalSupply()`.
/// @param _index A counter less than `totalSupply()`
/// @return The token identifier for the `_index`th NFT,
/// (sort order not specified)
function tokenByIndex(uint256 _index) external view returns (uint256);
/// @notice Enumerate NFTs assigned to an owner
/// @dev Throws if `_index` >= `balanceOf(_owner)` or if
/// `_owner` is the zero address, representing invalid NFTs.
/// @param _owner An address where we are interested in NFTs owned by them
/// @param _index A counter less than `balanceOf(_owner)`
/// @return The token identifier for the `_index`th NFT assigned to `_owner`,
/// (sort order not specified)
function tokenOfOwnerByIndex(address _owner, uint256 _index) external view returns (uint256);
}
/// 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 view returns (string _name);
/// @notice An abbreviated name for NFTs in this contract
function symbol() external view 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);
}
/// @dev Note: the ERC-165 identifier for this interface is 0x150b7a02.
interface ERC721TokenReceiver {
/// @notice Handle the receipt of an NFT
/// @dev The ERC721 smart contract calls this function on the recipient
/// after a `transfer`. 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)"))`
/// unless throwing
function onERC721Received(address _operator, address _from, uint256 _tokenId, bytes _data) external returns(bytes4);
}
/**
* @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;
}
}
/**
* 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;
}
}
library UrlStr {
// generate url by tokenId
// baseUrl must end with 00000000
function generateUrl(string url,uint256 _tokenId) internal pure returns (string _url){
_url = url;
bytes memory _tokenURIBytes = bytes(_url);
uint256 base_len = _tokenURIBytes.length - 1;
_tokenURIBytes[base_len - 7] = byte(48 + _tokenId / 10000000 % 10);
_tokenURIBytes[base_len - 6] = byte(48 + _tokenId / 1000000 % 10);
_tokenURIBytes[base_len - 5] = byte(48 + _tokenId / 100000 % 10);
_tokenURIBytes[base_len - 4] = byte(48 + _tokenId / 10000 % 10);
_tokenURIBytes[base_len - 3] = byte(48 + _tokenId / 1000 % 10);
_tokenURIBytes[base_len - 2] = byte(48 + _tokenId / 100 % 10);
_tokenURIBytes[base_len - 1] = byte(48 + _tokenId / 10 % 10);
_tokenURIBytes[base_len - 0] = byte(48 + _tokenId / 1 % 10);
}
}
/**
* @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 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;
}
}
/**
* @title Operator
* @dev Allow two roles: 'owner' or 'operator'
* - owner: admin/superuser (e.g. with financial rights)
* - operator: can update configurations
*/
contract Operator is Ownable {
address[] public operators;
uint public MAX_OPS = 20; // Default maximum number of operators allowed
mapping(address => bool) public isOperator;
event OperatorAdded(address operator);
event OperatorRemoved(address operator);
// @dev Throws if called by any non-operator account. Owner has all ops rights.
modifier onlyOperator() {
require(
isOperator[msg.sender] || msg.sender == owner,
"Permission denied. Must be an operator or the owner."
);
_;
}
/**
* @dev Allows the current owner or operators to add operators
* @param _newOperator New operator address
*/
function addOperator(address _newOperator) public onlyOwner {
require(
_newOperator != address(0),
"Invalid new operator address."
);
// Make sure no dups
require(
!isOperator[_newOperator],
"New operator exists."
);
// Only allow so many ops
require(
operators.length < MAX_OPS,
"Overflow."
);
operators.push(_newOperator);
isOperator[_newOperator] = true;
emit OperatorAdded(_newOperator);
}
/**
* @dev Allows the current owner or operators to remove operator
* @param _operator Address of the operator to be removed
*/
function removeOperator(address _operator) public onlyOwner {
// Make sure operators array is not empty
require(
operators.length > 0,
"No operator."
);
// Make sure the operator exists
require(
isOperator[_operator],
"Not an operator."
);
// Manual array manipulation:
// - replace the _operator with last operator in array
// - remove the last item from array
address lastOperator = operators[operators.length - 1];
for (uint i = 0; i < operators.length; i++) {
if (operators[i] == _operator) {
operators[i] = lastOperator;
}
}
operators.length -= 1; // remove the last element
isOperator[_operator] = false;
emit OperatorRemoved(_operator);
}
// @dev Remove ALL operators
function removeAllOps() public onlyOwner {
for (uint i = 0; i < operators.length; i++) {
isOperator[operators[i]] = false;
}
operators.length = 0;
}
}
contract Pausable is Operator {
event FrozenFunds(address target, bool frozen);
bool public isPaused = false;
mapping(address => bool) frozenAccount;
modifier whenNotPaused {
require(!isPaused);
_;
}
modifier whenPaused {
require(isPaused);
_;
}
modifier whenNotFreeze(address _target) {
require(_target != address(0));
require(!frozenAccount[_target]);
_;
}
function isFrozen(address _target) external view returns (bool) {
require(_target != address(0));
return frozenAccount[_target];
}
function doPause() external whenNotPaused onlyOwner {
isPaused = true;
}
function doUnpause() external whenPaused onlyOwner {
isPaused = false;
}
function freezeAccount(address _target, bool _freeze) public onlyOwner {
require(_target != address(0));
frozenAccount[_target] = _freeze;
emit FrozenFunds(_target, _freeze);
}
}
contract ERC721BasicToken is SupportsInterfaceWithLookup, ERC721, Pausable{
bytes4 public 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 public constant InterfaceId_ERC721Exists = 0x4f558e79;
/*
* 0x4f558e79 ===
* bytes4(keccak256('exists(uint256)'))
*/
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 public 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;
/**
* @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,"This token not owned by this address");
_;
}
function _ownerOf(uint256 _tokenId) internal view returns(address) {
address _owner = tokenOwner[_tokenId];
require(_owner != address(0),"Token not exist");
return _owner;
}
/**
* @dev Checks msg.sender can transfer a token, by being owner, approved, or operator
* @param _tokenId uint256 ID of the token to validate
*/
modifier canTransfer(uint256 _tokenId) {
require(isApprovedOrOwner(msg.sender, _tokenId), "This address have no permisstion");
_;
}
constructor()
public
{
// register the supported interfaces to conform to ERC721 via ERC165
_registerInterface(InterfaceId_ERC721);
_registerInterface(InterfaceId_ERC721Exists);
_registerInterface(ERC721_RECEIVED);
}
/**
* @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) external 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) external view returns (address) {
return _ownerOf(_tokenId);
}
/**
* @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) internal 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) external whenNotPaused {
address _owner = _ownerOf(_tokenId);
require(_to != _owner);
require(msg.sender == _owner || operatorApprovals[_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) external 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) external whenNotPaused {
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
)
external
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
)
external
canTransfer(_tokenId)
{
_transfer(_from,_to,_tokenId);
}
function _transfer(
address _from,
address _to,
uint256 _tokenId) internal {
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
)
external
canTransfer(_tokenId)
{
// 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) internal {
_transfer(_from, _to, _tokenId);
// solium-disable-next-line arg-overflow
require(checkAndCallSafeTransfer(_from, _to, _tokenId, _data));
}
function safeTransferFrom(
address _from,
address _to,
uint256 _tokenId,
bytes _data
)
external
canTransfer(_tokenId)
{
_safeTransferFrom(_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 ||
tokenApprovals[_tokenId] == _spender ||
operatorApprovals[_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 whenNotPaused {
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 whenNotPaused {
require(tokenOwner[_tokenId] == address(0));
require(!frozenAccount[_to]);
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 whenNotPaused {
require(_ownerOf(_tokenId) == _from);
require(!frozenAccount[_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 = ERC721TokenReceiver(_to).onERC721Received(
msg.sender, _from, _tokenId, _data);
return (retval == ERC721_RECEIVED);
}
}
contract ERC721ExtendToken is ERC721BasicToken, ERC721Enumerable, ERC721Metadata {
using UrlStr for string;
bytes4 public constant InterfaceId_ERC721Enumerable = 0x780e9d63;
/**
* 0x780e9d63 ===
* bytes4(keccak256('totalSupply()')) ^
* bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) ^
* bytes4(keccak256('tokenByIndex(uint256)'))
*/
bytes4 public constant InterfaceId_ERC721Metadata = 0x5b5e139f;
/**
* 0x5b5e139f ===
* bytes4(keccak256('name()')) ^
* bytes4(keccak256('symbol()')) ^
* bytes4(keccak256('tokenURI(uint256)'))
*/
string internal BASE_URL = "https://www.bitguild.com/bitizens/api/item/getItemInfo/00000000";
// 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;
function updateBaseURI(string _url) external onlyOwner {
BASE_URL = _url;
}
/**
* @dev Constructor function
*/
constructor() public {
// 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 "Bitizen item";
}
/**
* @dev Gets the token symbol
* @return string representing the token symbol
*/
function symbol() external view returns (string) {
return "ITMT";
}
/**
* @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) external view returns (string) {
require(exists(_tokenId));
return BASE_URL.generateUrl(_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(address(0)!=_owner);
require(_index < ownedTokensCount[_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 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 whenNotPaused {
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 whenNotPaused {
super.removeTokenFrom(_from, _tokenId);
uint256 tokenIndex = ownedTokensIndex[_tokenId];
uint256 lastTokenIndex = ownedTokens[_from].length.sub(1);
uint256 lastToken = ownedTokens[_from][lastTokenIndex];
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;
}
/**
* @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);
// 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;
}
}
/**
if a ERC721 item want to mount to avatar, it must to inherit this.
*/
interface AvatarChildService {
/**
@dev if you want your contract become a avatar child, please let your contract inherit this interface
@param _tokenId1 first child token id
@param _tokenId2 second child token id
@return true will unmount first token before mount ,false will directly mount child
*/
function compareItemSlots(uint256 _tokenId1, uint256 _tokenId2) external view returns (bool _res);
/**
@dev if you want your contract become a avatar child, please let your contract inherit this interface
@return return true will be to avatar child
*/
function isAvatarChild(uint256 _tokenId) external view returns(bool);
}
interface AvatarItemService {
function getTransferTimes(uint256 _tokenId) external view returns(uint256);
function getOwnedItems(address _owner) external view returns(uint256[] _tokenIds);
function getItemInfo(uint256 _tokenId)
external
view
returns(string, string, bool, uint256[4] _attr1, uint8[5] _attr2, uint16[2] _attr3);
function isBurned(uint256 _tokenId) external view returns (bool);
function isSameItem(uint256 _tokenId1, uint256 _tokenId2) external view returns (bool _isSame);
function getBurnedItemCount() external view returns (uint256);
function getBurnedItemByIndex(uint256 _index) external view returns (uint256);
function getSameItemCount(uint256 _tokenId) external view returns(uint256);
function getSameItemIdByIndex(uint256 _tokenId, uint256 _index) external view returns(uint256);
function getItemHash(uint256 _tokenId) external view returns (bytes8);
function burnItem(address _owner, uint256 _tokenId) external;
/**
@param _owner owner of the token
@param _founder founder type of the token
@param _creator creator type of the token
@param _isBitizenItem true is for bitizen or false
@param _attr1 _atrr1[0] => node _atrr1[1] => listNumber _atrr1[2] => setNumber _atrr1[3] => quality
@param _attr2 _atrr2[0] => rarity _atrr2[1] => socket _atrr2[2] => gender _atrr2[3] => energy _atrr2[4] => ext
@param _attr3 _atrr3[0] => miningTime _atrr3[1] => magicFind
@return token id
*/
function createItem(
address _owner,
string _founder,
string _creator,
bool _isBitizenItem,
uint256[4] _attr1,
uint8[5] _attr2,
uint16[2] _attr3)
external
returns(uint256 _tokenId);
function updateItem(
uint256 _tokenId,
bool _isBitizenItem,
uint16 _miningTime,
uint16 _magicFind,
uint256 _node,
uint256 _listNumber,
uint256 _setNumber,
uint256 _quality,
uint8 _rarity,
uint8 _socket,
uint8 _gender,
uint8 _energy,
uint8 _ext
)
external;
}
contract AvatarItemToken is ERC721ExtendToken, AvatarItemService, AvatarChildService {
enum ItemHandleType{NULL, CREATE_ITEM, UPDATE_ITEM, BURN_ITEM}
event ItemHandleEvent(address indexed _owner, uint256 indexed _itemId,ItemHandleType _type);
struct AvatarItem {
string foundedBy; // item founder
string createdBy; // item creator
bool isBitizenItem; // true for bitizen false for other
uint16 miningTime; // decrease the mine time, range to 0 ~ 10000/0.00% ~ 100.00%
uint16 magicFind; // increase get rare item, range to 0 ~ 10000/0.00% ~ 100.00%
uint256 node; // node token id
uint256 listNumber; // list number
uint256 setNumber; // set number
uint256 quality; // quality of item
uint8 rarity; // 01 => Common 02 => Uncommon 03 => Rare 04 => Epic 05 => Legendary 06 => Godlike 10 => Limited
uint8 socket; // 01 => Head 02 => Top 03 => Bottom 04 => Feet 05 => Trinket 06 => Acc 07 => Props
uint8 gender; // 00 => Male 01 => Female 10 => Male-only 11 => Female-only Unisex => 99
uint8 energy; // increases extra mining times
uint8 ext; // extra attribute for future
}
// item id index
uint256 internal itemIndex = 0;
// tokenId => item
mapping(uint256 => AvatarItem) internal avatarItems;
// all the burned token ids
uint256[] internal burnedItemIds;
// check token id => isBurned
mapping(uint256 => bool) internal isBurnedItem;
// hash(item) => tokenIds
mapping(bytes8 => uint256[]) internal sameItemIds;
// token id => index in the same item token ids array
mapping(uint256 => uint256) internal sameItemIdIndex;
// token id => hash(item)
mapping(uint256 => bytes8) internal itemIdToHash;
// item token id => transfer count
mapping(uint256 => uint256) internal itemTransferCount;
// avatar address, add default permission to handle item
address internal avatarAccount = this;
// contain burned token and exist token
modifier validItem(uint256 _itemId) {
require(_itemId > 0 && _itemId <= itemIndex, "token not vaild");
_;
}
modifier itemExists(uint256 _itemId){
require(exists(_itemId), "token error");
_;
}
function setDefaultApprovalAccount(address _account) public onlyOwner {
avatarAccount = _account;
}
function compareItemSlots(uint256 _itemId1, uint256 _itemId2)
external
view
itemExists(_itemId1)
itemExists(_itemId2)
returns (bool) {
require(_itemId1 != _itemId2, "compared token shouldn't be the same");
return avatarItems[_itemId1].socket == avatarItems[_itemId2].socket;
}
function isAvatarChild(uint256 _itemId) external view returns(bool){
return true;
}
function getTransferTimes(uint256 _itemId) external view validItem(_itemId) returns(uint256) {
return itemTransferCount[_itemId];
}
function getOwnedItems(address _owner) external view onlyOperator returns(uint256[] _items) {
require(_owner != address(0), "address invalid");
return ownedTokens[_owner];
}
function getItemInfo(uint256 _itemId)
external
view
validItem(_itemId)
returns(string, string, bool, uint256[4] _attr1, uint8[5] _attr2, uint16[2] _attr3) {
AvatarItem storage item = avatarItems[_itemId];
_attr1[0] = item.node;
_attr1[1] = item.listNumber;
_attr1[2] = item.setNumber;
_attr1[3] = item.quality;
_attr2[0] = item.rarity;
_attr2[1] = item.socket;
_attr2[2] = item.gender;
_attr2[3] = item.energy;
_attr2[4] = item.ext;
_attr3[0] = item.miningTime;
_attr3[1] = item.magicFind;
return (item.foundedBy, item.createdBy, item.isBitizenItem, _attr1, _attr2, _attr3);
}
function isBurned(uint256 _itemId) external view validItem(_itemId) returns (bool) {
return isBurnedItem[_itemId];
}
function getBurnedItemCount() external view returns (uint256) {
return burnedItemIds.length;
}
function getBurnedItemByIndex(uint256 _index) external view returns (uint256) {
require(_index < burnedItemIds.length, "out of boundary");
return burnedItemIds[_index];
}
function getSameItemCount(uint256 _itemId) external view validItem(_itemId) returns(uint256) {
return sameItemIds[itemIdToHash[_itemId]].length;
}
function getSameItemIdByIndex(uint256 _itemId, uint256 _index) external view validItem(_itemId) returns(uint256) {
bytes8 itemHash = itemIdToHash[_itemId];
uint256[] storage items = sameItemIds[itemHash];
require(_index < items.length, "out of boundray");
return items[_index];
}
function getItemHash(uint256 _itemId) external view validItem(_itemId) returns (bytes8) {
return itemIdToHash[_itemId];
}
function isSameItem(uint256 _itemId1, uint256 _itemId2)
external
view
validItem(_itemId1)
validItem(_itemId2)
returns (bool _isSame) {
if(_itemId1 == _itemId2) {
_isSame = true;
} else {
_isSame = _calcuItemHash(_itemId1) == _calcuItemHash(_itemId2);
}
}
function burnItem(address _owner, uint256 _itemId) external onlyOperator itemExists(_itemId) {
_burnItem(_owner, _itemId);
}
function createItem(
address _owner,
string _founder,
string _creator,
bool _isBitizenItem,
uint256[4] _attr1,
uint8[5] _attr2,
uint16[2] _attr3)
external
onlyOperator
returns(uint256 _itemId) {
require(_owner != address(0), "address invalid");
AvatarItem memory item = _mintItem(_founder, _creator, _isBitizenItem, _attr1, _attr2, _attr3);
_itemId = ++itemIndex;
avatarItems[_itemId] = item;
_mint(_owner, _itemId);
_saveItemHash(_itemId);
emit ItemHandleEvent(_owner, _itemId, ItemHandleType.CREATE_ITEM);
}
function updateItem(
uint256 _itemId,
bool _isBitizenItem,
uint16 _miningTime,
uint16 _magicFind,
uint256 _node,
uint256 _listNumber,
uint256 _setNumber,
uint256 _quality,
uint8 _rarity,
uint8 _socket,
uint8 _gender,
uint8 _energy,
uint8 _ext
)
external
onlyOperator
itemExists(_itemId){
_deleteOldValue(_itemId);
_updateItem(_itemId,_isBitizenItem,_miningTime,_magicFind,_node,_listNumber,_setNumber,_quality,_rarity,_socket,_gender,_energy,_ext);
_saveItemHash(_itemId);
}
function _deleteOldValue(uint256 _itemId) private {
uint256[] storage tokenIds = sameItemIds[itemIdToHash[_itemId]];
require(tokenIds.length > 0);
uint256 lastTokenId = tokenIds[tokenIds.length - 1];
tokenIds[sameItemIdIndex[_itemId]] = lastTokenId;
sameItemIdIndex[lastTokenId] = sameItemIdIndex[_itemId];
tokenIds.length--;
}
function _saveItemHash(uint256 _itemId) private {
bytes8 itemHash = _calcuItemHash(_itemId);
uint256 index = sameItemIds[itemHash].push(_itemId);
sameItemIdIndex[_itemId] = index - 1;
itemIdToHash[_itemId] = itemHash;
}
function _calcuItemHash(uint256 _itemId) private view returns (bytes8) {
AvatarItem storage item = avatarItems[_itemId];
bytes memory itemBytes = abi.encodePacked(
item.isBitizenItem,
item.miningTime,
item.magicFind,
item.node,
item.listNumber,
item.setNumber,
item.quality,
item.rarity,
item.socket,
item.gender,
item.energy,
item.ext
);
return bytes8(keccak256(itemBytes));
}
function _mintItem(
string _foundedBy,
string _createdBy,
bool _isBitizenItem,
uint256[4] _attr1,
uint8[5] _attr2,
uint16[2] _attr3)
private
pure
returns(AvatarItem _item) {
_item = AvatarItem(
_foundedBy,
_createdBy,
_isBitizenItem,
_attr3[0],
_attr3[1],
_attr1[0],
_attr1[1],
_attr1[2],
_attr1[3],
_attr2[0],
_attr2[1],
_attr2[2],
_attr2[3],
_attr2[4]
);
}
function _updateItem(
uint256 _itemId,
bool _isBitizenItem,
uint16 _miningTime,
uint16 _magicFind,
uint256 _node,
uint256 _listNumber,
uint256 _setNumber,
uint256 _quality,
uint8 _rarity,
uint8 _socket,
uint8 _gender,
uint8 _energy,
uint8 _ext
) private {
AvatarItem storage item = avatarItems[_itemId];
item.isBitizenItem = _isBitizenItem;
item.miningTime = _miningTime;
item.magicFind = _magicFind;
item.node = _node;
item.listNumber = _listNumber;
item.setNumber = _setNumber;
item.quality = _quality;
item.rarity = _rarity;
item.socket = _socket;
item.gender = _gender;
item.energy = _energy;
item.ext = _ext;
emit ItemHandleEvent(_ownerOf(_itemId), _itemId, ItemHandleType.UPDATE_ITEM);
}
function _burnItem(address _owner, uint256 _itemId) private {
burnedItemIds.push(_itemId);
isBurnedItem[_itemId] = true;
_burn(_owner, _itemId);
emit ItemHandleEvent(_owner, _itemId, ItemHandleType.BURN_ITEM);
}
// override
//Add default permission to avatar, user can change this permission by call setApprovalForAll
function _mint(address _to, uint256 _itemId) internal {
super._mint(_to, _itemId);
operatorApprovals[_to][avatarAccount] = true;
}
// override
// record every token transfer count
function _transfer(address _from, address _to, uint256 _itemId) internal {
super._transfer(_from, _to, _itemId);
itemTransferCount[_itemId]++;
}
function () public payable {
revert();
}
}