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Buy Token | 15548050 | 736 days ago | IN | 0.0056 ETH | 0.00479742 | ||||
Buy Token | 13432498 | 1070 days ago | IN | 0.01 ETH | 0.05000622 | ||||
Buy Token | 13039901 | 1131 days ago | IN | 0.006 ETH | 0.00178125 | ||||
Set Price | 11986134 | 1295 days ago | IN | 0 ETH | 0.00333088 | ||||
Buy Token | 11380623 | 1388 days ago | IN | 0.02 ETH | 0.0169879 | ||||
Buy Token | 11251559 | 1408 days ago | IN | 0.0101 ETH | 0.00767161 | ||||
Buy Token | 10575970 | 1512 days ago | IN | 0.0101 ETH | 0.01878088 | ||||
Buy Token | 10107803 | 1584 days ago | IN | 0.01 ETH | 0.01664797 | ||||
Set Price | 9787135 | 1634 days ago | IN | 0 ETH | 0.00006377 | ||||
Buy Token | 9781570 | 1635 days ago | IN | 0.035 ETH | 0.00079453 | ||||
Buy Token | 9741947 | 1641 days ago | IN | 0.05 ETH | 0.00150699 | ||||
Buy Token | 9670855 | 1652 days ago | IN | 0.1 ETH | 0.00134251 | ||||
Set Price | 9670673 | 1652 days ago | IN | 0 ETH | 0.00004118 | ||||
Buy Token | 8653058 | 1817 days ago | IN | 0.017 ETH | 0.00039963 | ||||
Buy Token | 7550630 | 1989 days ago | IN | 0.011 ETH | 0.00119891 | ||||
Set Wallet | 7167986 | 2057 days ago | IN | 0 ETH | 0.0000433 | ||||
Buy Token | 7013162 | 2086 days ago | IN | 0.015 ETH | 0.00039963 | ||||
Buy Token | 6727951 | 2134 days ago | IN | 0.09 ETH | 0.00139736 | ||||
0x60806040 | 6727849 | 2134 days ago | IN | 0 ETH | 0.00227101 |
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15548050 | 736 days ago | 0.0006 ETH | ||||
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13432498 | 1070 days ago | 0.005 ETH | ||||
13432498 | 1070 days ago | 0.005 ETH | ||||
11380623 | 1388 days ago | 0.01 ETH | ||||
11380623 | 1388 days ago | 0.01 ETH | ||||
11251559 | 1408 days ago | 0.0001 ETH | ||||
11251559 | 1408 days ago | 0.01 ETH | ||||
10575970 | 1512 days ago | 0.0001 ETH | ||||
10575970 | 1512 days ago | 0.01 ETH | ||||
10107803 | 1584 days ago | 0.01 ETH | ||||
9781570 | 1635 days ago | 0.035 ETH | ||||
9741947 | 1641 days ago | 0.05 ETH | ||||
9670855 | 1652 days ago | 0.1 ETH | ||||
8653058 | 1817 days ago | 0.007 ETH | ||||
8653058 | 1817 days ago | 0.01 ETH | ||||
7550630 | 1989 days ago | 0.001 ETH | ||||
7550630 | 1989 days ago | 0.01 ETH | ||||
7013162 | 2086 days ago | 0.005 ETH | ||||
7013162 | 2086 days ago | 0.01 ETH | ||||
6727951 | 2134 days ago | 0.08 ETH | ||||
6727951 | 2134 days ago | 0.01 ETH |
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Contract Name:
CryptoGiftMarketplace
Compiler Version
v0.4.24+commit.e67f0147
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity)
/** *Submitted for verification at Etherscan.io on 2018-11-18 */ pragma solidity ^0.4.24; // File: openzeppelin-solidity/contracts/math/SafeMath.sol /** * @title SafeMath * @dev Math operations with safety checks that revert on error */ library SafeMath { /** * @dev Multiplies two numbers, reverts on 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-solidity/pull/522 if (a == 0) { return 0; } uint256 c = a * b; require(c / a == b); return c; } /** * @dev Integer division of two numbers truncating the quotient, reverts on division by zero. */ function div(uint256 a, uint256 b) internal pure returns (uint256) { require(b > 0); // Solidity only automatically asserts 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 Subtracts two numbers, reverts on overflow (i.e. if subtrahend is greater than minuend). */ function sub(uint256 a, uint256 b) internal pure returns (uint256) { require(b <= a); uint256 c = a - b; return c; } /** * @dev Adds two numbers, reverts on overflow. */ function add(uint256 a, uint256 b) internal pure returns (uint256) { uint256 c = a + b; require(c >= a); return c; } /** * @dev Divides two numbers and returns the remainder (unsigned integer modulo), * reverts when dividing by zero. */ function mod(uint256 a, uint256 b) internal pure returns (uint256) { require(b != 0); return a % b; } } // File: openzeppelin-solidity/contracts/introspection/IERC165.sol /** * @title IERC165 * @dev https://github.com/ethereum/EIPs/blob/master/EIPS/eip-165.md */ interface IERC165 { /** * @notice Query if a contract implements an interface * @param interfaceId The interface identifier, as specified in ERC-165 * @dev Interface identification is specified in ERC-165. This function * uses less than 30,000 gas. */ function supportsInterface(bytes4 interfaceId) external view returns (bool); } // File: openzeppelin-solidity/contracts/token/ERC721/IERC721.sol /** * @title ERC721 Non-Fungible Token Standard basic interface * @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md */ 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 ); function balanceOf(address owner) public view returns (uint256 balance); function ownerOf(uint256 tokenId) public view returns (address owner); function approve(address to, uint256 tokenId) public; function getApproved(uint256 tokenId) public view returns (address operator); function setApprovalForAll(address operator, bool _approved) public; function isApprovedForAll(address owner, address operator) public view returns (bool); function transferFrom(address from, address to, uint256 tokenId) public; function safeTransferFrom(address from, address to, uint256 tokenId) public; function safeTransferFrom( address from, address to, uint256 tokenId, bytes data ) public; } // File: openzeppelin-solidity/contracts/token/ERC721/IERC721Receiver.sol /** * @title ERC721 token receiver interface * @dev Interface for any contract that wants to support safeTransfers * from ERC721 asset contracts. */ contract IERC721Receiver { /** * @notice Handle the receipt of an NFT * @dev The ERC721 smart contract calls this function on the recipient * after a `safeTransfer`. 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(keccak256("onERC721Received(address,address,uint256,bytes)"))` */ function onERC721Received( address operator, address from, uint256 tokenId, bytes data ) public returns(bytes4); } // File: openzeppelin-solidity/contracts/utils/Address.sol /** * Utility library of inline functions on addresses */ library Address { /** * 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 account address of the account to check * @return whether the target address is a contract */ function isContract(address account) 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(account) } return size > 0; } } // File: openzeppelin-solidity/contracts/introspection/ERC165.sol /** * @title ERC165 * @author Matt Condon (@shrugs) * @dev Implements ERC165 using a lookup table. */ contract ERC165 is IERC165 { bytes4 private 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) private _supportedInterfaces; /** * @dev A contract implementing SupportsInterfaceWithLookup * implement ERC165 itself */ constructor() internal { _registerInterface(_InterfaceId_ERC165); } /** * @dev implement supportsInterface(bytes4) using a lookup table */ function supportsInterface(bytes4 interfaceId) external view returns (bool) { return _supportedInterfaces[interfaceId]; } /** * @dev internal method for registering an interface */ function _registerInterface(bytes4 interfaceId) internal { require(interfaceId != 0xffffffff); _supportedInterfaces[interfaceId] = true; } } // File: openzeppelin-solidity/contracts/token/ERC721/ERC721.sol /** * @title ERC721 Non-Fungible Token Standard basic implementation * @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md */ contract ERC721 is ERC165, IERC721 { using SafeMath for uint256; using Address for address; // Equals to `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))` // which can be also obtained as `IERC721Receiver(0).onERC721Received.selector` bytes4 private constant _ERC721_RECEIVED = 0x150b7a02; // 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 => uint256) private _ownedTokensCount; // Mapping from owner to operator approvals mapping (address => mapping (address => bool)) private _operatorApprovals; bytes4 private 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)')) */ constructor() public { // register the supported interfaces to conform to ERC721 via ERC165 _registerInterface(_InterfaceId_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]; } /** * @dev Gets the owner of the specified token ID * @param tokenId uint256 ID of the token to query the owner of * @return owner address currently marked as the owner of the given token ID */ function ownerOf(uint256 tokenId) public view returns (address) { address owner = _tokenOwner[tokenId]; require(owner != address(0)); return owner; } /** * @dev 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)); return _tokenApprovals[tokenId]; } /** * @dev Sets or unsets the approval of a given operator * An operator is allowed to transfer all tokens of the sender on their behalf * @param to operator address to set the approval * @param approved representing the status of the approval to be set */ function setApprovalForAll(address to, bool approved) public { require(to != msg.sender); _operatorApprovals[msg.sender][to] = approved; emit ApprovalForAll(msg.sender, to, approved); } /** * @dev Tells whether an operator is approved by a given owner * @param owner owner address which you want to query the approval of * @param operator operator address which you want to query the approval of * @return bool whether the given operator is approved by the given owner */ function isApprovedForAll( address owner, address operator ) public view returns (bool) { return _operatorApprovals[owner][operator]; } /** * @dev Transfers the ownership of a given token ID to another address * Usage of this method is discouraged, use `safeTransferFrom` whenever possible * Requires the msg sender to be the owner, approved, or operator * @param from current owner of the token * @param to address to receive the ownership of the given token ID * @param tokenId uint256 ID of the token to be transferred */ function transferFrom( address from, address to, uint256 tokenId ) public { require(_isApprovedOrOwner(msg.sender, tokenId)); require(to != address(0)); _clearApproval(from, tokenId); _removeTokenFrom(from, tokenId); _addTokenTo(to, tokenId); emit Transfer(from, to, tokenId); } /** * @dev Safely transfers the ownership of a given token ID to another address * If the target address is a contract, it must implement `onERC721Received`, * which is called upon a safe transfer, and return the magic value * `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise, * the transfer is reverted. * * Requires the msg sender to be the owner, approved, or operator * @param from current owner of the token * @param to address to receive the ownership of the given token ID * @param tokenId uint256 ID of the token to be transferred */ function safeTransferFrom( address from, address to, uint256 tokenId ) public { // solium-disable-next-line arg-overflow safeTransferFrom(from, to, tokenId, ""); } /** * @dev Safely transfers the ownership of a given token ID to another address * If the target address is a contract, it must implement `onERC721Received`, * which is called upon a safe transfer, and return the magic value * `bytes4(keccak256("onERC721Received(address,address,uint256,bytes)"))`; otherwise, * the transfer is reverted. * Requires the msg sender to be the owner, approved, or operator * @param from current owner of the token * @param to address to receive the ownership of the given token ID * @param tokenId uint256 ID of the token to be transferred * @param _data bytes data to send along with a safe transfer check */ function safeTransferFrom( address from, address to, uint256 tokenId, bytes _data ) public { transferFrom(from, to, tokenId); // solium-disable-next-line arg-overflow require(_checkOnERC721Received(from, to, tokenId, _data)); } /** * @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 Returns whether the given spender can transfer a given token ID * @param spender address of the spender to query * @param tokenId uint256 ID of the token to be transferred * @return bool whether the msg.sender is approved for the given token ID, * is an operator of the owner, or is the owner of the token */ function _isApprovedOrOwner( address spender, uint256 tokenId ) internal view returns (bool) { address owner = ownerOf(tokenId); // Disable solium check because of // https://github.com/duaraghav8/Solium/issues/175 // solium-disable-next-line operator-whitespace return ( spender == owner || getApproved(tokenId) == spender || isApprovedForAll(owner, spender) ); } /** * @dev Internal function to mint a new token * Reverts if the given token ID already exists * @param to The address that will own the minted token * @param tokenId uint256 ID of the token to be minted by the msg.sender */ function _mint(address to, uint256 tokenId) internal { require(to != address(0)); _addTokenTo(to, tokenId); emit Transfer(address(0), to, tokenId); } /** * @dev Internal function to burn a specific token * Reverts if the token does not exist * @param tokenId uint256 ID of the token being burned by the msg.sender */ function _burn(address owner, uint256 tokenId) internal { _clearApproval(owner, tokenId); _removeTokenFrom(owner, tokenId); emit Transfer(owner, address(0), tokenId); } /** * @dev Internal function to add a token ID to the list of a given address * Note that this function is left internal to make ERC721Enumerable possible, but is not * intended to be called by custom derived contracts: in particular, it emits no Transfer event. * @param to address representing the new owner of the given token ID * @param tokenId uint256 ID of the token to be added to the tokens list of the given address */ function _addTokenTo(address to, uint256 tokenId) internal { require(_tokenOwner[tokenId] == address(0)); _tokenOwner[tokenId] = to; _ownedTokensCount[to] = _ownedTokensCount[to].add(1); } /** * @dev Internal function to remove a token ID from the list of a given address * Note that this function is left internal to make ERC721Enumerable possible, but is not * intended to be called by custom derived contracts: in particular, it emits no Transfer event, * and doesn't clear approvals. * @param from address representing the previous owner of the given token ID * @param tokenId uint256 ID of the token to be removed from the tokens list of the given address */ function _removeTokenFrom(address from, uint256 tokenId) internal { require(ownerOf(tokenId) == from); _ownedTokensCount[from] = _ownedTokensCount[from].sub(1); _tokenOwner[tokenId] = address(0); } /** * @dev Internal function to invoke `onERC721Received` on a target address * The call is not executed if the target address is not a contract * @param from address representing the previous owner of the given token ID * @param to target address that will receive the tokens * @param tokenId uint256 ID of the token to be transferred * @param _data bytes optional data to send along with the call * @return whether the call correctly returned the expected magic value */ function _checkOnERC721Received( address from, address to, uint256 tokenId, bytes _data ) internal returns (bool) { if (!to.isContract()) { return true; } bytes4 retval = IERC721Receiver(to).onERC721Received( msg.sender, from, tokenId, _data); return (retval == _ERC721_RECEIVED); } /** * @dev Private 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) private { require(ownerOf(tokenId) == owner); if (_tokenApprovals[tokenId] != address(0)) { _tokenApprovals[tokenId] = address(0); } } } // File: openzeppelin-solidity/contracts/token/ERC721/IERC721Enumerable.sol /** * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension * @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md */ contract 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); } // File: openzeppelin-solidity/contracts/token/ERC721/ERC721Enumerable.sol 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 private constant _InterfaceId_ERC721Enumerable = 0x780e9d63; /** * 0x780e9d63 === * bytes4(keccak256('totalSupply()')) ^ * bytes4(keccak256('tokenOfOwnerByIndex(address,uint256)')) ^ * bytes4(keccak256('tokenByIndex(uint256)')) */ /** * @dev Constructor function */ constructor() public { // register the supported interface to conform to ERC721 via ERC165 _registerInterface(_InterfaceId_ERC721Enumerable); } /** * @dev Gets the token ID at a given index of the tokens list of the requested owner * @param owner address owning the tokens list to be accessed * @param index uint256 representing the index to be accessed of the requested tokens list * @return uint256 token ID at the given index of the tokens list owned by the requested address */ function tokenOfOwnerByIndex( address owner, uint256 index ) public view returns (uint256) { require(index < balanceOf(owner)); return _ownedTokens[owner][index]; } /** * @dev Gets the total amount of tokens stored by the contract * @return uint256 representing the total amount of tokens */ function totalSupply() public view returns (uint256) { return _allTokens.length; } /** * @dev Gets the token ID at a given index of all the tokens in this contract * Reverts if the index is greater or equal to the total number of tokens * @param index uint256 representing the index to be accessed of the tokens list * @return uint256 token ID at the given index of the tokens list */ function tokenByIndex(uint256 index) public view returns (uint256) { require(index < totalSupply()); return _allTokens[index]; } /** * @dev Internal function to add a token ID to the list of a given address * This function is internal due to language limitations, see the note in ERC721.sol. * It is not intended to be called by custom derived contracts: in particular, it emits no Transfer event. * @param to address representing the new owner of the given token ID * @param tokenId uint256 ID of the token to be added to the tokens list of the given address */ function _addTokenTo(address to, uint256 tokenId) internal { super._addTokenTo(to, tokenId); uint256 length = _ownedTokens[to].length; _ownedTokens[to].push(tokenId); _ownedTokensIndex[tokenId] = length; } /** * @dev Internal function to remove a token ID from the list of a given address * This function is internal due to language limitations, see the note in ERC721.sol. * It is not intended to be called by custom derived contracts: in particular, it emits no Transfer event, * and doesn't clear approvals. * @param from address representing the previous owner of the given token ID * @param tokenId uint256 ID of the token to be removed from the tokens list of the given address */ function _removeTokenFrom(address from, uint256 tokenId) internal { super._removeTokenFrom(from, tokenId); // To prevent a gap in the array, we store the last token in the index of the token to delete, and // then delete the last slot. uint256 tokenIndex = _ownedTokensIndex[tokenId]; uint256 lastTokenIndex = _ownedTokens[from].length.sub(1); uint256 lastToken = _ownedTokens[from][lastTokenIndex]; _ownedTokens[from][tokenIndex] = lastToken; // This also deletes the contents at the last position of the array _ownedTokens[from].length--; // Note that this will handle single-element arrays. In that case, both tokenIndex and lastTokenIndex are going to // be zero. Then we can make sure that we will remove tokenId from the ownedTokens list since we are first swapping // the lastToken to the first position, and then dropping the element placed in the last position of the list _ownedTokensIndex[tokenId] = 0; _ownedTokensIndex[lastToken] = tokenIndex; } /** * @dev Internal function to mint a new token * Reverts if the given token ID already exists * @param to address the beneficiary that will own the minted token * @param tokenId uint256 ID of the token to be minted by the msg.sender */ function _mint(address to, uint256 tokenId) internal { super._mint(to, tokenId); _allTokensIndex[tokenId] = _allTokens.length; _allTokens.push(tokenId); } /** * @dev Internal function to burn a specific token * Reverts if the token does not exist * @param owner owner of the token to burn * @param tokenId uint256 ID of the token being burned by the msg.sender */ function _burn(address owner, uint256 tokenId) internal { super._burn(owner, tokenId); // Reorg all tokens array uint256 tokenIndex = _allTokensIndex[tokenId]; uint256 lastTokenIndex = _allTokens.length.sub(1); uint256 lastToken = _allTokens[lastTokenIndex]; _allTokens[tokenIndex] = lastToken; _allTokens[lastTokenIndex] = 0; _allTokens.length--; _allTokensIndex[tokenId] = 0; _allTokensIndex[lastToken] = tokenIndex; } } // File: openzeppelin-solidity/contracts/token/ERC721/IERC721Metadata.sol /** * @title ERC-721 Non-Fungible Token Standard, optional metadata extension * @dev See https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md */ contract IERC721Metadata is IERC721 { function name() external view returns (string); function symbol() external view returns (string); function tokenURI(uint256 tokenId) external view returns (string); } // File: openzeppelin-solidity/contracts/token/ERC721/ERC721Metadata.sol 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 private constant InterfaceId_ERC721Metadata = 0x5b5e139f; /** * 0x5b5e139f === * bytes4(keccak256('name()')) ^ * bytes4(keccak256('symbol()')) ^ * bytes4(keccak256('tokenURI(uint256)')) */ /** * @dev Constructor function */ constructor(string name, string symbol) public { _name = name; _symbol = symbol; // register the supported interfaces to conform to ERC721 via ERC165 _registerInterface(InterfaceId_ERC721Metadata); } /** * @dev Gets the token name * @return string representing the token name */ function name() external view returns (string) { return _name; } /** * @dev Gets the token symbol * @return string representing the token symbol */ function symbol() external view returns (string) { return _symbol; } /** * @dev Returns an URI for a given token ID * Throws if the token ID does not exist. May return an empty string. * @param tokenId uint256 ID of the token to query */ function tokenURI(uint256 tokenId) external view returns (string) { require(_exists(tokenId)); 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 uri) internal { require(_exists(tokenId)); _tokenURIs[tokenId] = uri; } /** * @dev Internal function to burn a specific token * Reverts if the token does not exist * @param owner owner of the token to burn * @param tokenId uint256 ID of the token being burned by the msg.sender */ function _burn(address owner, uint256 tokenId) internal { super._burn(owner, tokenId); // Clear metadata (if any) if (bytes(_tokenURIs[tokenId]).length != 0) { delete _tokenURIs[tokenId]; } } } // File: openzeppelin-solidity/contracts/token/ERC721/ERC721Full.sol /** * @title Full ERC721 Token * This implementation includes all the required and some optional functionality of the ERC721 standard * Moreover, it includes approve all functionality using operator terminology * @dev see https://github.com/ethereum/EIPs/blob/master/EIPS/eip-721.md */ contract ERC721Full is ERC721, ERC721Enumerable, ERC721Metadata { constructor(string name, string symbol) ERC721Metadata(name, symbol) public { } } // File: openzeppelin-solidity/contracts/access/Roles.sol /** * @title Roles * @dev Library for managing addresses assigned to a Role. */ library Roles { struct Role { mapping (address => bool) bearer; } /** * @dev give an account access to this role */ function add(Role storage role, address account) internal { require(account != address(0)); require(!has(role, account)); role.bearer[account] = true; } /** * @dev remove an account's access to this role */ function remove(Role storage role, address account) internal { require(account != address(0)); require(has(role, account)); role.bearer[account] = false; } /** * @dev check if an account has this role * @return bool */ function has(Role storage role, address account) internal view returns (bool) { require(account != address(0)); return role.bearer[account]; } } // File: openzeppelin-solidity/contracts/access/roles/MinterRole.sol contract MinterRole { using Roles for Roles.Role; event MinterAdded(address indexed account); event MinterRemoved(address indexed account); Roles.Role private minters; constructor() internal { _addMinter(msg.sender); } modifier onlyMinter() { require(isMinter(msg.sender)); _; } function isMinter(address account) public view returns (bool) { return minters.has(account); } function addMinter(address account) public onlyMinter { _addMinter(account); } function renounceMinter() public { _removeMinter(msg.sender); } function _addMinter(address account) internal { minters.add(account); emit MinterAdded(account); } function _removeMinter(address account) internal { minters.remove(account); emit MinterRemoved(account); } } // File: openzeppelin-solidity/contracts/token/ERC20/IERC20.sol /** * @title ERC20 interface * @dev see https://github.com/ethereum/EIPs/issues/20 */ interface IERC20 { function totalSupply() external view returns (uint256); function balanceOf(address who) external view returns (uint256); function allowance(address owner, address spender) external view returns (uint256); function transfer(address to, uint256 value) external returns (bool); function approve(address spender, uint256 value) external returns (bool); function transferFrom(address from, address to, uint256 value) external returns (bool); event Transfer( address indexed from, address indexed to, uint256 value ); event Approval( address indexed owner, address indexed spender, uint256 value ); } // File: openzeppelin-solidity/contracts/ownership/Ownable.sol /** * @title Ownable * @dev The Ownable contract has an owner address, and provides basic authorization control * functions, this simplifies the implementation of "user permissions". */ contract Ownable { address private _owner; event OwnershipTransferred( address indexed previousOwner, address indexed newOwner ); /** * @dev The Ownable constructor sets the original `owner` of the contract to the sender * account. */ constructor() internal { _owner = msg.sender; emit OwnershipTransferred(address(0), _owner); } /** * @return the address of the owner. */ function owner() public view returns(address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(isOwner()); _; } /** * @return true if `msg.sender` is the owner of the contract. */ function isOwner() public view returns(bool) { return 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 OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Allows the current owner to transfer control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function transferOwnership(address newOwner) public onlyOwner { _transferOwnership(newOwner); } /** * @dev Transfers control of the contract to a newOwner. * @param newOwner The address to transfer ownership to. */ function _transferOwnership(address newOwner) internal { require(newOwner != address(0)); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } } // File: eth-token-recover/contracts/TokenRecover.sol /** * @title TokenRecover * @author Vittorio Minacori (https://github.com/vittominacori) * @dev Allow to recover any ERC20 sent into the contract for error */ contract TokenRecover is Ownable { /** * @dev Remember that only owner can call so be careful when use on contracts generated from other contracts. * @param tokenAddress The token contract address * @param tokenAmount Number of tokens to be sent */ function recoverERC20( address tokenAddress, uint256 tokenAmount ) public onlyOwner { IERC20(tokenAddress).transfer(owner(), tokenAmount); } } // File: contracts/token/CryptoGiftToken.sol /** * @title CryptoGiftToken * @author Vittorio Minacori (https://github.com/vittominacori) * @dev It is an ERC721Full with minter role and a struct that identify the gift */ contract CryptoGiftToken is ERC721Full, MinterRole, TokenRecover { // structure that defines a gift struct GiftStructure { uint256 amount; address purchaser; string content; uint256 date; uint256 style; } // number of available gift styles uint256 private _styles; // a progressive id uint256 private _progressiveId; // max available number of gift uint256 private _maxSupply; // Mapping from token ID to the structures mapping(uint256 => GiftStructure) private _structureIndex; // checks if we can generate tokens modifier canGenerate() { require( _progressiveId < _maxSupply, "Max token supply reached" ); _; } constructor( string name, string symbol, uint256 maxSupply ) public ERC721Full(name, symbol) { _maxSupply = maxSupply; } function styles() external view returns (uint256) { return _styles; } function progressiveId() external view returns (uint256) { return _progressiveId; } function maxSupply() external view returns (uint256) { return _maxSupply; } /** * @dev Generate a new gift and the gift structure. */ function newGift( uint256 amount, address purchaser, address beneficiary, string content, uint256 date, uint256 style ) external canGenerate onlyMinter returns (uint256) { require( date > 0, "Date must be greater than zero" ); require( style <= _styles, "Style is not available" ); uint256 tokenId = _progressiveId.add(1); _mint(beneficiary, tokenId); _structureIndex[tokenId] = GiftStructure( amount, purchaser, content, date, style ); _progressiveId = tokenId; return tokenId; } /** * @dev Checks if token is visible. */ function isVisible ( uint256 tokenId ) external view returns (bool visible, uint256 date) { if (_exists(tokenId)) { GiftStructure storage gift = _structureIndex[tokenId]; // solium-disable-next-line security/no-block-members visible = block.timestamp >= gift.date; date = gift.date; } else { visible = false; date = 0; } } /** * @dev Returns the gift structure. */ function getGift (uint256 tokenId) external view returns ( uint256 amount, address purchaser, address beneficiary, string content, uint256 date, uint256 style ) { require( _exists(tokenId), "Token must exists" ); GiftStructure storage gift = _structureIndex[tokenId]; require( block.timestamp >= gift.date, // solium-disable-line security/no-block-members "Now should be greater than gift date" ); amount = gift.amount; purchaser = gift.purchaser; beneficiary = ownerOf(tokenId); content = gift.content; date = gift.date; style = gift.style; } /** * @dev Only contract owner or token owner can burn */ function burn(uint256 tokenId) external { address tokenOwner = isOwner() ? ownerOf(tokenId) : msg.sender; super._burn(tokenOwner, tokenId); delete _structureIndex[tokenId]; } /** * @dev Set the max amount of styles available */ function setStyles(uint256 newStyles) external onlyMinter { require( newStyles > _styles, "Styles cannot be decreased" ); _styles = newStyles; } } // File: contracts/marketplace/CryptoGiftMarketplace.sol /** * @title CryptoGiftMarketplace * @author Vittorio Minacori (https://github.com/vittominacori) * @dev It is Crowdsale contract to sell CryptoGift */ contract CryptoGiftMarketplace is TokenRecover { using SafeMath for uint256; // The token being sold CryptoGiftToken private _token; // Address where funds are collected address private _wallet; // The price for a token uint256 private _price; /** * Event for token purchase logging * @param purchaser who paid for the tokens * @param beneficiary who got the tokens * @param value weis paid for purchase * @param tokenId the token id purchased */ event TokenPurchase( address indexed purchaser, address indexed beneficiary, uint256 value, uint256 tokenId ); /** * @param price The price for a token in wei * @param wallet Address where collected funds will be forwarded to * @param token Address of the token being sold */ constructor(uint256 price, address wallet, address token) public { require( wallet != address(0), "Wallet can't be the zero address" ); require( token != address(0), "Token can't be the zero address" ); _price = price; _wallet = wallet; _token = CryptoGiftToken(token); } /** * @dev low level token purchase ***DO NOT OVERRIDE*** * @param beneficiary Address performing the token purchase */ function buyToken( address beneficiary, string content, uint256 date, uint256 style ) external payable { uint256 weiAmount = msg.value; _preValidatePurchase(beneficiary, weiAmount); uint256 giftValue = msg.value.sub(_price); uint256 lastTokenId = _processPurchase( giftValue, beneficiary, content, date, style ); emit TokenPurchase( msg.sender, beneficiary, giftValue, lastTokenId ); _forwardFunds(giftValue, beneficiary); } function token() external view returns (CryptoGiftToken) { return _token; } function wallet() external view returns (address) { return _wallet; } function price() external view returns (uint256) { return _price; } /** * @dev Set the price of a gift * @param newPrice Value of the gift */ function setPrice(uint256 newPrice) external onlyOwner { _price = newPrice; } /** * @dev Change the destination wallet * @param newWallet Address of the wallet */ function setWallet(address newWallet) external onlyOwner { require( newWallet != address(0), "Wallet can't be the zero address" ); _wallet = newWallet; } /** * @dev Validation of an incoming purchase. Use require statements to revert state when conditions are not met. Use super to concatenate validations. * @param beneficiary Address performing the token purchase * @param weiAmount Value in wei involved in the purchase */ function _preValidatePurchase( address beneficiary, uint256 weiAmount ) internal view { require( beneficiary != address(0), "Beneficiary can't be the zero address" ); require( weiAmount >= _price, "Sent ETH must be greater than or equal to token price" ); } /** * @dev Executed when a purchase has been validated and is ready to be executed. */ function _processPurchase( uint256 amount, address beneficiary, string content, uint256 date, uint256 style ) internal returns (uint256) { return _token.newGift( amount, msg.sender, beneficiary, content, date, style ); } /** * @dev Determines how ETH is stored/forwarded on purchases. */ function _forwardFunds(uint256 giftValue, address beneficiary) internal { if (_price > 0) { _wallet.transfer(_price); } if (giftValue > 0) { beneficiary.transfer(giftValue); } } }
Contract Security Audit
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Contract Creation Code
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Deployed Bytecode
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
Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
000000000000000000000000000000000000000000000000002386f26fc10000000000000000000000000000335d6cec3668f9951c3aa90600986ab350b3d059000000000000000000000000970e90db5bfd3e4dea453fb061e1146ee3e23df8
-----Decoded View---------------
Arg [0] : price (uint256): 10000000000000000
Arg [1] : wallet (address): 0x335D6cEc3668F9951c3aa90600986aB350B3D059
Arg [2] : token (address): 0x970E90Db5bFd3E4dEa453fb061E1146eE3e23Df8
-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 000000000000000000000000000000000000000000000000002386f26fc10000
Arg [1] : 000000000000000000000000335d6cec3668f9951c3aa90600986ab350b3d059
Arg [2] : 000000000000000000000000970e90db5bfd3e4dea453fb061e1146ee3e23df8
Swarm Source
bzzr://fb2c8b5f0a881ed4ce673315b9751a9e71f4a5b4db31a515b21397f1613b21b1
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Multichain Portfolio | 27 Chains
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.