ERC-721
NFT
Overview
Max Total Supply
348 ASYNC
Holders
28
Market
Volume (24H)
N/A
Min Price (24H)
N/A
Max Price (24H)
N/A
Other Info
Token Contract
Balance
1 ASYNCLoading...
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# | Exchange | Pair | Price | 24H Volume | % Volume |
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Contract Name:
AsyncArtwork
Compiler Version
v0.5.16+commit.9c3226ce
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2020-02-26 */ /** Copyright (C) 2020 Asynchronous Art, Inc. GNU General Public License v3.0 Full notice https://github.com/asyncart/async-contracts/blob/master/LICENSE */ pragma solidity ^0.5.12; interface IERC165 { /** * @dev Returns true if this contract implements the interface defined by * `interfaceId`. See the corresponding * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section] * to learn more about how these ids are created. * * This function call must use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); } contract IERC721 is IERC165 { 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); /** * @dev Returns the number of NFTs in `owner`'s account. */ function balanceOf(address owner) public view returns (uint256 balance); /** * @dev Returns the owner of the NFT specified by `tokenId`. */ function ownerOf(uint256 tokenId) public view returns (address owner); /** * @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to * another (`to`). * * * * Requirements: * - `from`, `to` cannot be zero. * - `tokenId` must be owned by `from`. * - If the caller is not `from`, it must be have been allowed to move this * NFT by either {approve} or {setApprovalForAll}. */ function safeTransferFrom(address from, address to, uint256 tokenId) public; /** * @dev Transfers a specific NFT (`tokenId`) from one account (`from`) to * another (`to`). * * Requirements: * - If the caller is not `from`, it must be approved to move this NFT by * either {approve} or {setApprovalForAll}. */ function transferFrom(address from, address to, uint256 tokenId) public; 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 safeTransferFrom(address from, address to, uint256 tokenId, bytes memory data) public; } contract IERC721Receiver { /** * @notice Handle the receipt of an NFT * @dev The ERC721 smart contract calls this function on the recipient * after a {IERC721-safeTransferFrom}. This function MUST return the function selector, * otherwise the caller will revert the transaction. The selector to be * returned can be obtained as `this.onERC721Received.selector`. This * function MAY throw to revert and reject the transfer. * Note: the ERC721 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 `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))` */ function onERC721Received(address operator, address from, uint256 tokenId, bytes memory data) public returns (bytes4); } library SafeMath { /** * @dev Returns the addition of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `+` operator. * * Requirements: * - Addition cannot overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a, "SafeMath: addition overflow"); return c; } /** * @dev Returns the subtraction of two unsigned integers, reverting on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { return sub(a, b, "SafeMath: subtraction overflow"); } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * Counterpart to Solidity's `-` operator. * * Requirements: * - Subtraction cannot overflow. * * _Available since v2.4.0._ */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); uint256 c = a - b; return c; } /** * @dev Returns the multiplication of two unsigned integers, reverting on * overflow. * * Counterpart to Solidity's `*` operator. * * Requirements: * - Multiplication cannot overflow. */ function mul(uint256 a, uint256 b) internal pure returns (uint256) { // Gas optimization: this is cheaper than requiring 'a' not being zero, but the // benefit is lost if 'b' is also tested. // See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b, "SafeMath: multiplication overflow"); return c; } /** * @dev Returns the integer division of two unsigned integers. Reverts on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { return div(a, b, "SafeMath: division by zero"); } /** * @dev Returns the integer division of two unsigned integers. Reverts with custom message on * division by zero. The result is rounded towards zero. * * Counterpart to Solidity's `/` operator. Note: this function uses a * `revert` opcode (which leaves remaining gas untouched) while Solidity * uses an invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function div(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { // Solidity only automatically asserts when dividing by 0 require(b > 0, errorMessage); uint256 c = a / b; // assert(a == b * c + a % b); // There is no case in which this doesn't hold return c; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { return mod(a, b, "SafeMath: modulo by zero"); } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * Reverts with custom message when dividing by zero. * * Counterpart to Solidity's `%` operator. This function uses a `revert` * opcode (which leaves remaining gas untouched) while Solidity uses an * invalid opcode to revert (consuming all remaining gas). * * Requirements: * - The divisor cannot be zero. * * _Available since v2.4.0._ */ function mod(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b != 0, errorMessage); return a % b; } } library Address { /** * @dev Returns true if `account` is a contract. * * This test is non-exhaustive, and there may be false-negatives: during the * execution of a contract's constructor, its address will be reported as * not containing a contract. * * IMPORTANT: It is unsafe to assume that an address for which this * function returns false is an externally-owned account (EOA) and not a * contract. */ function isContract(address account) internal view returns (bool) { // This method relies in extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. // According to EIP-1052, 0x0 is the value returned for not-yet created accounts // and 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470 is returned // for accounts without code, i.e. `keccak256('')` bytes32 codehash; bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470; // solhint-disable-next-line no-inline-assembly assembly { codehash := extcodehash(account) } return (codehash != 0x0 && codehash != accountHash); } /** * @dev Converts an `address` into `address payable`. Note that this is * simply a type cast: the actual underlying value is not changed. * * _Available since v2.4.0._ */ function toPayable(address account) internal pure returns (address payable) { return address(uint160(account)); } /** * @dev Replacement for Solidity's `transfer`: sends `amount` wei to * `recipient`, forwarding all available gas and reverting on errors. * * https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost * of certain opcodes, possibly making contracts go over the 2300 gas limit * imposed by `transfer`, making them unable to receive funds via * `transfer`. {sendValue} removes this limitation. * * https://diligence.consensys.net/posts/2019/09/stop-using-soliditys-transfer-now/[Learn more]. * * IMPORTANT: because control is transferred to `recipient`, care must be * taken to not create reentrancy vulnerabilities. Consider using * {ReentrancyGuard} or the * https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern]. * * _Available since v2.4.0._ */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-call-value (bool success, ) = recipient.call.value(amount)(""); require(success, "Address: unable to send value, recipient may have reverted"); } } library Counters { using SafeMath for uint256; struct Counter { // This variable should never be directly accessed by users of the library: interactions must be restricted to // the library's function. As of Solidity v0.5.2, this cannot be enforced, though there is a proposal to add // this feature: see https://github.com/ethereum/solidity/issues/4637 uint256 _value; // default: 0 } function current(Counter storage counter) internal view returns (uint256) { return counter._value; } function increment(Counter storage counter) internal { counter._value += 1; } function decrement(Counter storage counter) internal { counter._value = counter._value.sub(1); } } contract ERC165 is IERC165 { /* * bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7 */ bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7; /** * @dev Mapping of interface ids to whether or not it's supported. */ mapping(bytes4 => bool) private _supportedInterfaces; constructor () internal { // Derived contracts need only register support for their own interfaces, // we register support for ERC165 itself here _registerInterface(_INTERFACE_ID_ERC165); } /** * @dev See {IERC165-supportsInterface}. * * Time complexity O(1), guaranteed to always use less than 30 000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool) { return _supportedInterfaces[interfaceId]; } /** * @dev Registers the contract as an implementer of the interface defined by * `interfaceId`. Support of the actual ERC165 interface is automatic and * registering its interface id is not required. * * See {IERC165-supportsInterface}. * * Requirements: * * - `interfaceId` cannot be the ERC165 invalid interface (`0xffffffff`). */ function _registerInterface(bytes4 interfaceId) internal { require(interfaceId != 0xffffffff, "ERC165: invalid interface id"); _supportedInterfaces[interfaceId] = true; } } contract ERC721 is ERC165, IERC721 { using SafeMath for uint256; using Address for address; using Counters for Counters.Counter; // Mapping from token ID to owner mapping (uint256 => address) private _tokenOwner; // Mapping from token ID to approved address mapping (uint256 => address) private _tokenApprovals; // Mapping from owner to number of owned token mapping (address => Counters.Counter) private _ownedTokensCount; // Mapping from owner to operator approvals mapping (address => mapping (address => bool)) private _operatorApprovals; /* * bytes4(keccak256('balanceOf(address)')) == 0x70a08231 * bytes4(keccak256('ownerOf(uint256)')) == 0x6352211e * bytes4(keccak256('approve(address,uint256)')) == 0x095ea7b3 * bytes4(keccak256('getApproved(uint256)')) == 0x081812fc * bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465 * bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5 * bytes4(keccak256('transferFrom(address,address,uint256)')) == 0x23b872dd * bytes4(keccak256('safeTransferFrom(address,address,uint256)')) == 0x42842e0e * bytes4(keccak256('safeTransferFrom(address,address,uint256,bytes)')) == 0xb88d4fde * * => 0x70a08231 ^ 0x6352211e ^ 0x095ea7b3 ^ 0x081812fc ^ * 0xa22cb465 ^ 0xe985e9c ^ 0x23b872dd ^ 0x42842e0e ^ 0xb88d4fde == 0x80ac58cd */ bytes4 private constant _INTERFACE_ID_ERC721 = 0x80ac58cd; constructor () public { // register the supported interfaces to conform to ERC721 via ERC165 _registerInterface(_INTERFACE_ID_ERC721); } /** * @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].current(); } /** * @dev Gets the owner of the specified token ID. * @param tokenId uint256 ID of the token to query the owner of * @return 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 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 * Reverts if the token ID does not exist. * @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) { // require(_exists(tokenId), "ERC721: approved query for nonexistent token"); 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 { //solhint-disable-next-line max-line-length require(_isApprovedOrOwner(msg.sender, tokenId)); _transferFrom(from, to, tokenId); } /** * @dev Safely transfers the ownership of a given token ID to another address * 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 { safeTransferFrom(from, to, tokenId, ""); } /** * @dev Safely transfers the ownership of a given token ID to another address * Requires the _msgSender() 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 memory _data) public { require(_isApprovedOrOwner(msg.sender, tokenId)); _transferFrom(from, to, tokenId); } /** * @dev Returns whether the specified token exists. * @param tokenId uint256 ID of the token to query the existence of * @return bool whether the token exists */ function _exists(uint256 tokenId) internal view returns (bool) { address owner = _tokenOwner[tokenId]; return owner != address(0); } /** * @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); return (spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender)); } /** * @dev Internal function to safely 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 */ function _safeMint(address to, uint256 tokenId) internal { _safeMint(to, tokenId, ""); } /** * @dev Internal function to safely 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 * @param _data bytes data to send along with a safe transfer check */ function _safeMint(address to, uint256 tokenId, bytes memory _data) internal { _mint(to, tokenId); } /** * @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 */ function _mint(address to, uint256 tokenId) internal { require(to != address(0)); require(!_exists(tokenId), "token already minted"); _tokenOwner[tokenId] = to; _ownedTokensCount[to].increment(); emit Transfer(address(0), to, tokenId); } /** * @dev Internal function to burn a specific token. * Reverts if the token does not exist. * Deprecated, use {_burn} instead. * @param owner owner of the token to burn * @param tokenId uint256 ID of the token being burned */ function _burn(address owner, uint256 tokenId) internal { require(ownerOf(tokenId) == owner); _clearApproval(tokenId); _ownedTokensCount[owner].decrement(); _tokenOwner[tokenId] = address(0); emit Transfer(owner, address(0), 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 */ function _burn(uint256 tokenId) internal { _burn(ownerOf(tokenId), tokenId); } /** * @dev Internal function to transfer ownership of a given token ID to another address. * As opposed to {transferFrom}, this imposes no restrictions on msg.sender. * @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) internal { require(ownerOf(tokenId) == from, "not owner"); require(to != address(0)); _clearApproval(tokenId); _ownedTokensCount[from].decrement(); _ownedTokensCount[to].increment(); _tokenOwner[tokenId] = to; emit Transfer(from, to, tokenId); } /** * @dev Private function to clear current approval of a given token ID. * @param tokenId uint256 ID of the token to be transferred */ function _clearApproval(uint256 tokenId) private { if (_tokenApprovals[tokenId] != address(0)) { _tokenApprovals[tokenId] = address(0); } } } contract IERC721Enumerable is IERC721 { 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); } contract ERC721Enumerable is ERC165, ERC721, IERC721Enumerable { // Mapping from owner to list of owned token IDs mapping(address => uint256[]) private _ownedTokens; // Mapping from token ID to index of the owner tokens list mapping(uint256 => uint256) private _ownedTokensIndex; // Array with all token ids, used for enumeration uint256[] private _allTokens; // Mapping from token id to position in the allTokens array mapping(uint256 => uint256) private _allTokensIndex; /* * bytes4(keccak256('totalSupply()')) == 0x18160ddd * bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) == 0x2f745c59 * bytes4(keccak256('tokenByIndex(uint256)')) == 0x4f6ccce7 * * => 0x18160ddd ^ 0x2f745c59 ^ 0x4f6ccce7 == 0x780e9d63 */ bytes4 private constant _INTERFACE_ID_ERC721_ENUMERABLE = 0x780e9d63; /** * @dev Constructor function. */ constructor () public { // register the supported interface to conform to ERC721Enumerable via ERC165 _registerInterface(_INTERFACE_ID_ERC721_ENUMERABLE); } /** * @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), "ERC721Enumerable: owner index out of bounds"); 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(), "ERC721Enumerable: global index out of bounds"); return _allTokens[index]; } /** * @dev Internal function to transfer ownership of a given token ID to another address. * As opposed to transferFrom, this imposes no restrictions on msg.sender. * @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) internal { super._transferFrom(from, to, tokenId); _removeTokenFromOwnerEnumeration(from, tokenId); _addTokenToOwnerEnumeration(to, tokenId); } /** * @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 */ function _mint(address to, uint256 tokenId) internal { super._mint(to, tokenId); _addTokenToOwnerEnumeration(to, tokenId); _addTokenToAllTokensEnumeration(tokenId); } /** * @dev Internal function to burn a specific token. * Reverts if the token does not exist. * Deprecated, use {ERC721-_burn} instead. * @param owner owner of the token to burn * @param tokenId uint256 ID of the token being burned */ function _burn(address owner, uint256 tokenId) internal { super._burn(owner, tokenId); _removeTokenFromOwnerEnumeration(owner, tokenId); // Since tokenId will be deleted, we can clear its slot in _ownedTokensIndex to trigger a gas refund _ownedTokensIndex[tokenId] = 0; _removeTokenFromAllTokensEnumeration(tokenId); } /** * @dev Gets the list of token IDs of the requested owner. * @param owner address owning the tokens * @return uint256[] List of token IDs owned by the requested address */ function _tokensOfOwner(address owner) internal view returns (uint256[] storage) { return _ownedTokens[owner]; } /** * @dev Private function to add a token to this extension's ownership-tracking data structures. * @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 _addTokenToOwnerEnumeration(address to, uint256 tokenId) private { _ownedTokensIndex[tokenId] = _ownedTokens[to].length; _ownedTokens[to].push(tokenId); } /** * @dev Private function to add a token to this extension's token tracking data structures. * @param tokenId uint256 ID of the token to be added to the tokens list */ function _addTokenToAllTokensEnumeration(uint256 tokenId) private { _allTokensIndex[tokenId] = _allTokens.length; _allTokens.push(tokenId); } /** * @dev Private function to remove a token from this extension's ownership-tracking data structures. Note that * while the token is not assigned a new owner, the `_ownedTokensIndex` mapping is _not_ updated: this allows for * gas optimizations e.g. when performing a transfer operation (avoiding double writes). * This has O(1) time complexity, but alters the order of the _ownedTokens array. * @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 _removeTokenFromOwnerEnumeration(address from, uint256 tokenId) private { // To prevent a gap in from's tokens array, we store the last token in the index of the token to delete, and // then delete the last slot (swap and pop). uint256 lastTokenIndex = _ownedTokens[from].length.sub(1); uint256 tokenIndex = _ownedTokensIndex[tokenId]; // When the token to delete is the last token, the swap operation is unnecessary if (tokenIndex != lastTokenIndex) { uint256 lastTokenId = _ownedTokens[from][lastTokenIndex]; _ownedTokens[from][tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token _ownedTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index } // This also deletes the contents at the last position of the array _ownedTokens[from].length--; // Note that _ownedTokensIndex[tokenId] hasn't been cleared: it still points to the old slot (now occupied by // lastTokenId, or just over the end of the array if the token was the last one). } /** * @dev Private function to remove a token from this extension's token tracking data structures. * This has O(1) time complexity, but alters the order of the _allTokens array. * @param tokenId uint256 ID of the token to be removed from the tokens list */ function _removeTokenFromAllTokensEnumeration(uint256 tokenId) private { // To prevent a gap in the tokens array, we store the last token in the index of the token to delete, and // then delete the last slot (swap and pop). uint256 lastTokenIndex = _allTokens.length.sub(1); uint256 tokenIndex = _allTokensIndex[tokenId]; // When the token to delete is the last token, the swap operation is unnecessary. However, since this occurs so // rarely (when the last minted token is burnt) that we still do the swap here to avoid the gas cost of adding // an 'if' statement (like in _removeTokenFromOwnerEnumeration) uint256 lastTokenId = _allTokens[lastTokenIndex]; _allTokens[tokenIndex] = lastTokenId; // Move the last token to the slot of the to-delete token _allTokensIndex[lastTokenId] = tokenIndex; // Update the moved token's index // This also deletes the contents at the last position of the array _allTokens.length--; _allTokensIndex[tokenId] = 0; } } contract IERC721Metadata is IERC721 { function name() external view returns (string memory); function symbol() external view returns (string memory); function tokenURI(uint256 tokenId) external view returns (string memory); } contract ERC721Metadata is ERC165, ERC721, IERC721Metadata { // Token name string private _name; // Token symbol string private _symbol; // Optional mapping for token URIs mapping(uint256 => string) private _tokenURIs; /* * bytes4(keccak256('name()')) == 0x06fdde03 * bytes4(keccak256('symbol()')) == 0x95d89b41 * bytes4(keccak256('tokenURI(uint256)')) == 0xc87b56dd * * => 0x06fdde03 ^ 0x95d89b41 ^ 0xc87b56dd == 0x5b5e139f */ bytes4 private constant _INTERFACE_ID_ERC721_METADATA = 0x5b5e139f; /** * @dev Constructor function */ constructor (string memory name, string memory symbol) public { _name = name; _symbol = symbol; // register the supported interfaces to conform to ERC721 via ERC165 _registerInterface(_INTERFACE_ID_ERC721_METADATA); } /** * @dev Gets the token name. * @return string representing the token name */ function name() external view returns (string memory) { return _name; } /** * @dev Gets the token symbol. * @return string representing the token symbol */ function symbol() external view returns (string memory) { 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) external view returns (string memory) { // require(_exists(tokenId), "ERC721Metadata: URI query for nonexistent token"); return _tokenURIs[tokenId]; } /** * @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 memory uri) internal { require(_exists(tokenId), "URI set of nonexistent token"); _tokenURIs[tokenId] = uri; } /** * @dev Internal function to burn a specific token. * Reverts if the token does not exist. * Deprecated, use _burn(uint256) instead. * @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]; } } } contract AsyncArtwork is ERC721, ERC721Enumerable, ERC721Metadata { // An event whenever the platform address is updated event PlatformAddressUpdated ( address platformAddress ); // An event whenever royalty amounts are updated event RoyaltyAmountUpdated ( uint256 platformFirstPercentage, uint256 platformSecondPercentage, uint256 artistSecondPercentage ); // An event whenever a bid is proposed event BidProposed ( uint256 tokenId, uint256 bidAmount, address bidder ); // An event whenever an bid is withdrawn event BidWithdrawn ( uint256 tokenId ); // An event whenever a buy now price has been set event BuyPriceSet ( uint256 tokenId, uint256 price ); // An event when a token has been sold event TokenSale ( // the id of the token uint256 tokenId, // the price that the token was sold for uint256 salePrice, // the address of the buyer address buyer ); // An event whenever a control token has been updated event ControlLeverUpdated ( // the id of the token uint256 tokenId, // an optional amount that the updater sent to boost priority of the rendering uint256 priorityTip, // the ids of the levers that were updated uint256[] leverIds, // the previous values that the levers had before this update (for clients who want to animate the change) int256[] previousValues, // the new updated value int256[] updatedValues ); // struct for a token that controls part of the artwork struct ControlToken { // number that tracks how many levers there are uint256 numControlLevers; // false by default, true once instantiated bool exists; // false by default, true once setup by the artist bool isSetup; // the levers that this control token can use mapping (uint256 => ControlLever) levers; } // struct for a lever on a control token that can be changed struct ControlLever { // // The minimum value this token can have (inclusive) int256 minValue; // The maximum value this token can have (inclusive) int256 maxValue; // The current value for this token int256 currentValue; // false by default, true once instantiated bool exists; } // struct for a pending bid struct PendingBid { // the address of the bidder address payable bidder; // the amount that they bid uint256 amount; // false by default, true once instantiated bool exists; } // creators who are allowed to mint on this contract mapping (address => bool) public whitelistedCreators; // for each token, holds an array of the creator collaborators. For layer tokens it will likely just be [artist], for master tokens it may hold multiples mapping (uint256 => address payable[]) public uniqueTokenCreators; // map a control token id to a control token struct mapping (uint256 => ControlToken) controlTokenMapping; // map control token ID to its buy price mapping (uint256 => uint256) public buyPrices; // map a control token ID to its highest bid mapping (uint256 => PendingBid) public pendingBids; // track whether this token was sold the first time or not (used for determining whether to use first or secondary sale percentage) mapping (uint256 => bool) public tokenDidHaveFirstSale; // mapping of addresses that are allowed to control tokens on your behalf mapping (address => address) public permissionedControllers; // the percentage of sale that the platform gets on first sales uint256 public platformFirstSalePercentage; // the percentage of sale that the platform gets on secondary sales uint256 public platformSecondSalePercentage; // the percentage of sale that an artist gets on secondary sales uint256 public artistSecondSalePercentage; // gets incremented to placehold for tokens not minted yet uint256 public expectedTokenSupply; // the address of the platform (for receving commissions and royalties) address payable public platformAddress; constructor (string memory name, string memory symbol) public ERC721Metadata(name, symbol) { // starting royalty amounts platformFirstSalePercentage = 10; platformSecondSalePercentage = 1; artistSecondSalePercentage = 4; // by default, the platformAddress is the address that mints this contract platformAddress = msg.sender; // by default, platform is whitelisted updateWhitelist(platformAddress, true); } // modifier for only allowing the platform to make a call modifier onlyPlatform() { require(msg.sender == platformAddress); _; } modifier onlyWhitelistedCreator() { require(whitelistedCreators[msg.sender] == true); _; } function updateWhitelist(address creator, bool state) public onlyPlatform { whitelistedCreators[creator] = state; } // Allows the current platform address to update to something different function updatePlatformAddress(address payable newPlatformAddress) public onlyPlatform { platformAddress = newPlatformAddress; emit PlatformAddressUpdated(newPlatformAddress); } // Update the royalty percentages that platform and artists receive on first or secondary sales function updateRoyaltyPercentages(uint256 _platformFirstSalePercentage, uint256 _platformSecondSalePercentage, uint256 _artistSecondSalePercentage) public onlyPlatform { // don't let the platform take all of a first sale require (_platformFirstSalePercentage < 100); // don't let secondary percentages take all of a sale either require (_platformSecondSalePercentage.add(_artistSecondSalePercentage) < 100); // update the percentage that the platform gets on first sale platformFirstSalePercentage = _platformFirstSalePercentage; // update the percentage that the platform gets on secondary sales platformSecondSalePercentage = _platformSecondSalePercentage; // update the percentage that artists get on secondary sales artistSecondSalePercentage = _artistSecondSalePercentage; // emit an event that contains the new royalty percentage values emit RoyaltyAmountUpdated(platformFirstSalePercentage, platformSecondSalePercentage, artistSecondSalePercentage); } function setupControlToken(uint256 controlTokenId, string memory controlTokenURI, int256[] memory leverMinValues, int256[] memory leverMaxValues, int256[] memory leverStartValues, address payable[] memory additionalCollaborators ) public { // check that a control token exists for this token id require (controlTokenMapping[controlTokenId].exists, "No control token found"); // ensure that this token is not setup yet require (controlTokenMapping[controlTokenId].isSetup == false, "Already setup"); // ensure that only the control token artist is attempting this mint require(uniqueTokenCreators[controlTokenId][0] == msg.sender, "Must be control token artist"); // enforce that the length of all the array lengths are equal require((leverMinValues.length == leverMaxValues.length) && (leverMaxValues.length == leverStartValues.length), "Values array mismatch"); // mint the control token here super._safeMint(msg.sender, controlTokenId); // set token URI super._setTokenURI(controlTokenId, controlTokenURI); // create the control token controlTokenMapping[controlTokenId] = ControlToken(leverStartValues.length, true, true); // create the control token levers now for (uint256 k = 0; k < leverStartValues.length; k++) { // enforce that maxValue is greater than or equal to minValue require (leverMaxValues[k] >= leverMinValues[k], "Max val must >= min"); // enforce that currentValue is valid require((leverStartValues[k] >= leverMinValues[k]) && (leverStartValues[k] <= leverMaxValues[k]), "Invalid start val"); // add the lever to this token controlTokenMapping[controlTokenId].levers[k] = ControlLever(leverMinValues[k], leverMaxValues[k], leverStartValues[k], true); } // the control token artist can optionally specify additional collaborators on this layer for (uint256 i = 0; i < additionalCollaborators.length; i++) { // can't provide burn address as collaborator require(additionalCollaborators[i] != address(0)); uniqueTokenCreators[controlTokenId].push(additionalCollaborators[i]); } } function mintArtwork(uint256 artworkTokenId, string memory artworkTokenURI, address payable[] memory controlTokenArtists ) public onlyWhitelistedCreator { require (artworkTokenId == expectedTokenSupply, "ExpectedTokenSupply different"); // Mint the token that represents ownership of the entire artwork super._safeMint(msg.sender, artworkTokenId); expectedTokenSupply++; super._setTokenURI(artworkTokenId, artworkTokenURI); // track the msg.sender address as the artist address for future royalties uniqueTokenCreators[artworkTokenId].push(msg.sender); // iterate through all control token URIs (1 for each control token) for (uint256 i = 0; i < controlTokenArtists.length; i++) { // can't provide burn address as artist require(controlTokenArtists[i] != address(0)); // use the curren token supply as the next token id uint256 controlTokenId = expectedTokenSupply; expectedTokenSupply++; uniqueTokenCreators[controlTokenId].push(controlTokenArtists[i]); // stub in an existing control token so exists is true controlTokenMapping[controlTokenId] = ControlToken(0, true, false); if (controlTokenArtists[i] != msg.sender) { bool containsControlTokenArtist = false; for (uint256 k = 0; k < uniqueTokenCreators[artworkTokenId].length; k++) { if (uniqueTokenCreators[artworkTokenId][k] == controlTokenArtists[i]) { containsControlTokenArtist = true; break; } } if (containsControlTokenArtist == false) { uniqueTokenCreators[artworkTokenId].push(controlTokenArtists[i]); } } } } // Bidder functions function bid(uint256 tokenId) public payable { // don't let owners/approved bid on their own tokens require(_isApprovedOrOwner(msg.sender, tokenId) == false); // check if there's a high bid if (pendingBids[tokenId].exists) { // enforce that this bid is higher require(msg.value > pendingBids[tokenId].amount, "Bid must be > than current bid"); // Return bid amount back to bidder pendingBids[tokenId].bidder.transfer(pendingBids[tokenId].amount); } // set the new highest bid pendingBids[tokenId] = PendingBid(msg.sender, msg.value, true); // Emit event for the bid proposal emit BidProposed(tokenId, msg.value, msg.sender); } // allows an address with a pending bid to withdraw it function withdrawBid(uint256 tokenId) public { // check that there is a bid from the sender to withdraw require (pendingBids[tokenId].exists && (pendingBids[tokenId].bidder == msg.sender)); // Return bid amount back to bidder pendingBids[tokenId].bidder.transfer(pendingBids[tokenId].amount); // clear highest bid pendingBids[tokenId] = PendingBid(address(0), 0, false); // emit an event when the highest bid is withdrawn emit BidWithdrawn(tokenId); } // Buy the artwork for the currently set price function takeBuyPrice(uint256 tokenId) public payable { // don't let owners/approved buy their own tokens require(_isApprovedOrOwner(msg.sender, tokenId) == false); // get the sale amount uint256 saleAmount = buyPrices[tokenId]; // check that there is a buy price require(saleAmount > 0); // check that the buyer sent enough to purchase require (msg.value >= saleAmount); // Return all highest bidder's money if (pendingBids[tokenId].exists) { // Return bid amount back to bidder pendingBids[tokenId].bidder.transfer(pendingBids[tokenId].amount); // clear highest bid pendingBids[tokenId] = PendingBid(address(0), 0, false); } onTokenSold(tokenId, saleAmount, msg.sender); } function distributeFundsToCreators(uint256 amount, address payable[] memory creators) private { uint256 creatorShare = amount.div(creators.length); for (uint256 i = 0; i < creators.length; i++) { creators[i].transfer(creatorShare); } } function onTokenSold(uint256 tokenId, uint256 saleAmount, address to) private { // if the first sale already happened, then give the artist + platform the secondary royalty percentage if (tokenDidHaveFirstSale[tokenId]) { // give platform its secondary sale percentage uint256 platformAmount = saleAmount.mul(platformSecondSalePercentage).div(100); platformAddress.transfer(platformAmount); // distribute the creator royalty amongst the creators (all artists involved for a base token, sole artist creator for layer ) uint256 creatorAmount = saleAmount.mul(artistSecondSalePercentage).div(100); distributeFundsToCreators(creatorAmount, uniqueTokenCreators[tokenId]); // cast the owner to a payable address address payable payableOwner = address(uint160(ownerOf(tokenId))); // transfer the remaining amount to the owner of the token payableOwner.transfer(saleAmount.sub(platformAmount).sub(creatorAmount)); } else { tokenDidHaveFirstSale[tokenId] = true; // give platform its first sale percentage uint256 platformAmount = saleAmount.mul(platformFirstSalePercentage).div(100); platformAddress.transfer(platformAmount); // this is a token first sale, so distribute the remaining funds to the unique token creators of this token // (if it's a base token it will be all the unique creators, if it's a control token it will be that single artist) distributeFundsToCreators(saleAmount.sub(platformAmount), uniqueTokenCreators[tokenId]); } // clear highest bid pendingBids[tokenId] = PendingBid(address(0), 0, false); // Transfer token to msg.sender safeTransferFrom(ownerOf(tokenId), to, tokenId, ""); // Emit event emit TokenSale(tokenId, saleAmount, to); } // Owner functions // Allow owner to accept the highest bid for a token function acceptBid(uint256 tokenId) public { // check if sender is owner/approved of token require(_isApprovedOrOwner(msg.sender, tokenId)); // check if there's a bid to accept require (pendingBids[tokenId].exists); // process the sale onTokenSold(tokenId, pendingBids[tokenId].amount, pendingBids[tokenId].bidder); } // Allows owner of a control token to set an immediate buy price. Set to 0 to reset. function makeBuyPrice(uint256 tokenId, uint256 amount) public { // check if sender is owner/approved of token require(_isApprovedOrOwner(msg.sender, tokenId)); // set the buy price buyPrices[tokenId] = amount; // emit event emit BuyPriceSet(tokenId, amount); } // return the min, max, and current value of a control lever function getControlToken(uint256 controlTokenId) public view returns (int256[] memory) { require(controlTokenMapping[controlTokenId].exists); ControlToken storage controlToken = controlTokenMapping[controlTokenId]; int256[] memory returnValues = new int256[](controlToken.numControlLevers.mul(3)); uint256 returnValIndex = 0; // iterate through all the control levers for this control token for (uint256 i = 0; i < controlToken.numControlLevers; i++) { returnValues[returnValIndex] = controlToken.levers[i].minValue; returnValIndex = returnValIndex.add(1); returnValues[returnValIndex] = controlToken.levers[i].maxValue; returnValIndex = returnValIndex.add(1); returnValues[returnValIndex] = controlToken.levers[i].currentValue; returnValIndex = returnValIndex.add(1); } return returnValues; } // anyone can grant permission to another address to control tokens on their behalf. Set to Address(0) to reset. function grantControlPermission(address permissioned) public { permissionedControllers[msg.sender] = permissioned; } // Allows owner (or permissioned user) of a control token to update its lever values // Optionally accept a payment to increase speed of rendering priority function useControlToken(uint256 controlTokenId, uint256[] memory leverIds, int256[] memory newValues) public payable { // check if sender is owner/approved of token OR if they're a permissioned controller for the token owner require(_isApprovedOrOwner(msg.sender, controlTokenId) || (permissionedControllers[ownerOf(controlTokenId)] == msg.sender), "Owner or permissioned only"); // collect the previous lever values for the event emit below int256[] memory previousValues = new int256[](newValues.length); for (uint256 i = 0; i < leverIds.length; i++) { // get the control lever ControlLever storage lever = controlTokenMapping[controlTokenId].levers[leverIds[i]]; // Enforce that the new value is valid require((newValues[i] >= lever.minValue) && (newValues[i] <= lever.maxValue), "Invalid val"); // Enforce that the new value is different require(newValues[i] != lever.currentValue, "Must provide different val"); // grab previous value for the event emit int256 previousValue = lever.currentValue; // Update token current value lever.currentValue = newValues[i]; // collect the previous lever values for the event emit below previousValues[i] = previousValue; } // if there's a payment then send it to the platform (for higher priority updates) if (msg.value > 0) { platformAddress.transfer(msg.value); } // emit event emit ControlLeverUpdated(controlTokenId, msg.value, leverIds, previousValues, newValues); } // override the default transfer function _transferFrom(address from, address to, uint256 tokenId) internal { super._transferFrom(from, to, tokenId); // clear a buy now price after being transferred buyPrices[tokenId] = 0; } }
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payable","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"platformFirstSalePercentage","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"platformSecondSalePercentage","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"safeTransferFrom","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"},{"internalType":"bytes","name":"_data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"to","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"controlTokenId","type":"uint256"},{"internalType":"string","name":"controlTokenURI","type":"string"},{"internalType":"int256[]","name":"leverMinValues","type":"int256[]"},{"internalType":"int256[]","name":"leverMaxValues","type":"int256[]"},{"internalType":"int256[]","name":"leverStartValues","type":"int256[]"},{"internalType":"address payable[]","name":"additionalCollaborators","type":"address[]"}],"name":"setupControlToken","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"takeBuyPrice","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"tokenDidHaveFirstSale","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"owner","type":"address"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"tokenOfOwnerByIndex","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"tokenURI","outputs":[{"internalType":"string","name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"transferFrom","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[{"internalType":"uint256","name":"","type":"uint256"},{"internalType":"uint256","name":"","type":"uint256"}],"name":"uniqueTokenCreators","outputs":[{"internalType":"address payable","name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"address payable","name":"newPlatformAddress","type":"address"}],"name":"updatePlatformAddress","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"_platformFirstSalePercentage","type":"uint256"},{"internalType":"uint256","name":"_platformSecondSalePercentage","type":"uint256"},{"internalType":"uint256","name":"_artistSecondSalePercentage","type":"uint256"}],"name":"updateRoyaltyPercentages","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"address","name":"creator","type":"address"},{"internalType":"bool","name":"state","type":"bool"}],"name":"updateWhitelist","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"controlTokenId","type":"uint256"},{"internalType":"uint256[]","name":"leverIds","type":"uint256[]"},{"internalType":"int256[]","name":"newValues","type":"int256[]"}],"name":"useControlToken","outputs":[],"payable":true,"stateMutability":"payable","type":"function"},{"constant":true,"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"whitelistedCreators","outputs":[{"internalType":"bool","name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"internalType":"uint256","name":"tokenId","type":"uint256"}],"name":"withdrawBid","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"}]
Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
0000000000000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000008000000000000000000000000000000000000000000000000000000000000000094173796e6320417274000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000054153594e43000000000000000000000000000000000000000000000000000000
-----Decoded View---------------
Arg [0] : name (string): Async Art
Arg [1] : symbol (string): ASYNC
-----Encoded View---------------
6 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000040
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000009
Arg [3] : 4173796e63204172740000000000000000000000000000000000000000000000
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000005
Arg [5] : 4153594e43000000000000000000000000000000000000000000000000000000
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