Overview
ETH Balance
244.42284 ETH
Eth Value
$850,577.17 (@ $3,479.94/ETH)Token Holdings
More Info
Private Name Tags
ContractCreator
TokenTracker
Latest 25 from a total of 5,180 transactions
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Set Approval For... | 21466975 | 2 days ago | IN | 0 ETH | 0.00055679 | ||||
Safe Transfer Fr... | 21437122 | 6 days ago | IN | 0 ETH | 0.00108302 | ||||
Safe Transfer Fr... | 21437119 | 6 days ago | IN | 0 ETH | 0.00112857 | ||||
Safe Transfer Fr... | 21437116 | 6 days ago | IN | 0 ETH | 0.00113401 | ||||
Set Approval For... | 21381339 | 13 days ago | IN | 0 ETH | 0.0015911 | ||||
Set Approval For... | 21313169 | 23 days ago | IN | 0 ETH | 0.00029177 | ||||
Set Approval For... | 21287419 | 27 days ago | IN | 0 ETH | 0.00051288 | ||||
Set Approval For... | 21286788 | 27 days ago | IN | 0 ETH | 0.00073591 | ||||
Set Approval For... | 21166858 | 43 days ago | IN | 0 ETH | 0.00213694 | ||||
Set Approval For... | 21144146 | 47 days ago | IN | 0 ETH | 0.00118663 | ||||
Set Approval For... | 21122315 | 50 days ago | IN | 0 ETH | 0.00084657 | ||||
Set Approval For... | 21085493 | 55 days ago | IN | 0 ETH | 0.00019485 | ||||
Set Approval For... | 20995921 | 67 days ago | IN | 0 ETH | 0.00042443 | ||||
Set Approval For... | 20808766 | 93 days ago | IN | 0 ETH | 0.0004014 | ||||
Set Approval For... | 20781476 | 97 days ago | IN | 0 ETH | 0.00083713 | ||||
Safe Transfer Fr... | 20564682 | 128 days ago | IN | 0 ETH | 0.0001151 | ||||
Safe Transfer Fr... | 20564678 | 128 days ago | IN | 0 ETH | 0.00011693 | ||||
Safe Transfer Fr... | 20564674 | 128 days ago | IN | 0 ETH | 0.00012023 | ||||
Set Approval For... | 20506713 | 136 days ago | IN | 0 ETH | 0.00008508 | ||||
Set Approval For... | 20413383 | 149 days ago | IN | 0 ETH | 0.00020319 | ||||
Set Approval For... | 20299138 | 165 days ago | IN | 0 ETH | 0.00009494 | ||||
Set Approval For... | 20215884 | 176 days ago | IN | 0 ETH | 0.00005008 | ||||
Set Approval For... | 20170340 | 183 days ago | IN | 0 ETH | 0.00036105 | ||||
Safe Transfer Fr... | 20170324 | 183 days ago | IN | 0 ETH | 0.00041091 | ||||
Safe Transfer Fr... | 20170322 | 183 days ago | IN | 0 ETH | 0.0003864 |
Latest 25 internal transactions (View All)
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21466988 | 2 days ago | 0.5994 ETH | ||||
21333627 | 20 days ago | 0.6921 ETH | ||||
21287427 | 27 days ago | 0.6291 ETH | ||||
21166910 | 43 days ago | 0.828 ETH | ||||
21166896 | 43 days ago | 0.5121 ETH | ||||
20711824 | 107 days ago | 0.7245 ETH | ||||
20413385 | 149 days ago | 0.5697 ETH | ||||
20183192 | 181 days ago | 0.6921 ETH | ||||
20170380 | 183 days ago | 0.7245 ETH | ||||
20170370 | 183 days ago | 0.5994 ETH | ||||
20170365 | 183 days ago | 0.5409 ETH | ||||
20123509 | 189 days ago | 0.5994 ETH | ||||
20093271 | 193 days ago | 0.7578 ETH | ||||
19777674 | 237 days ago | 0.5409 ETH | ||||
19777653 | 237 days ago | 0.04808 ETH | ||||
19777653 | 237 days ago | 0.601 ETH | ||||
19775515 | 238 days ago | 0.7929 ETH | ||||
19775512 | 238 days ago | 0.6606 ETH | ||||
19725080 | 245 days ago | 0.5409 ETH | ||||
19725078 | 245 days ago | 1.9575 ETH | ||||
19688758 | 250 days ago | 0.6606 ETH | ||||
19492580 | 277 days ago | 0.5697 ETH | ||||
19492578 | 277 days ago | 0.6606 ETH | ||||
19465829 | 281 days ago | 0.5697 ETH | ||||
19429040 | 286 days ago | 0.5994 ETH |
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Contract Name:
EulerBeats
Compiler Version
v0.7.6+commit.7338295f
Optimization Enabled:
Yes with 200 runs
Other Settings:
default evmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; import "@openzeppelin/contracts/access/Ownable.sol"; import "./ERC1155.sol"; // EulerBeats are generative visual & audio art pieces. The recipe and instructions to re-create the visualization and music reside on Ethereum blockchain. // // To recreate your art, you will need to retrieve the script // // STEPS TO RETRIEVE THE SCRIPTS: // - The artwork re-generation script is written in JavaScript, split into pieces, and stored on chain. // - Query the contract for the scriptCount - this is the number of pieces of the re-genereation script. You will need all of them. // - Run the getScriptAtIndex method in the EulerBeats smart contract starting with parameter 0, this is will return a transaction hash // - The "Input Data" field of this transaction contains the first segment of the script. Convert this into UTF-8 format // - Repeat these last two steps, incrementing the parameter in the getScriptAtIndex method until the number of script segments matches the scrtipCount contract EulerBeats is Ownable, ERC1155 { using SafeMath for uint256; /***********************************| | Variables and Events | |__________________________________*/ // For Minting and Burning, locks the prices bool private _enabled = false; // For metadata (scripts), when locked, cannot be changed bool private _locked = false; // Number of script sections stored uint256 public scriptCount = 0; // The scripts that can be used to render the NFT (audio and visual) mapping (uint256 => string) scripts; // The 40 bit is flag to distinguish prints - 1 for print uint256 constant SEED_MASK = uint40(~0); uint256 constant PRINTS_FLAG_BIT = 1 << 39; // Supply restriction on prints uint256 constant MAX_PRINT_SUPPLY = 120; // Supply restriction on seeds/original NFTs uint256 constant MAX_SEEDS_SUPPLY = 27; // Total supply of prints and seeds/original NFTs mapping(uint256 => uint256) public totalSupply; // Total number of seeds/original NFTs minted uint256 public originalsMinted = 0; // Owner of the seed/original NFT mapping(uint256 => address payable) public seedToOwner; // Cost of minting an original/seed uint256 public mintPrice = 0.271 ether; // Funds reserved for burns uint256 public reserve = 0; // For bonding curve uint256 constant K = 1 ether; uint256 constant B = 50; uint256 constant C = 26; uint256 constant D = 8; uint256 constant SIG_DIGITS = 3; /** * @dev Emitted when an original NFT with a new seed is minted */ event MintOriginal(address indexed to, uint256 seed, uint256 indexed originalsMinted); /** * @dev Emitted when an print is minted */ event PrintMinted( address indexed to, uint256 id, uint256 indexed seed, uint256 pricePaid, uint256 nextPrintPrice, uint256 nextBurnPrice, uint256 printsSupply, uint256 royaltyPaid, uint256 reserve, address indexed royaltyRecipient ); /** * @dev Emitted when an print is burned */ event PrintBurned( address indexed to, uint256 id, uint256 indexed seed, uint256 priceReceived, uint256 nextPrintPrice, uint256 nextBurnPrice, uint256 printsSupply, uint256 reserve ); constructor(string memory _uri) ERC1155("EulerBeats", "eBEATS", _uri) {} /***********************************| | Modifiers | |__________________________________*/ modifier onlyWhenEnabled() { require(_enabled, "Contract is disabled"); _; } modifier onlyWhenDisabled() { require(!_enabled, "Contract is enabled"); _; } modifier onlyUnlocked() { require(!_locked, "Contract is locked"); _; } /***********************************| | User Interactions | |__________________________________*/ /** * @dev Function to mint tokens. Msg.value must be sufficient */ function mint() public payable onlyWhenEnabled returns (uint256) { uint256 newOriginalsSupply = originalsMinted.add(1); require( newOriginalsSupply <= MAX_SEEDS_SUPPLY, "Max supply reached" ); require(msg.value == mintPrice, "Insufficient payment"); // The generated seed == the original nft token id. // Both terms are used throughout and refer to the same thing. uint256 seed = _generateSeed(newOriginalsSupply); // Increment the supply per original nft (max: 1) totalSupply[seed]++; assert(totalSupply[seed] == 1); // Update total originals minted originalsMinted = newOriginalsSupply; _mint(msg.sender, seed, 1, ""); emit MintOriginal(msg.sender, seed, newOriginalsSupply); return seed; } /** * @dev Function to mint prints from an existing seed. Msg.value must be sufficient. * @param seed The NFT id to mint print of */ function mintPrint(uint256 seed) public payable onlyWhenEnabled returns (uint256) { require(seedToOwner[seed] != address(0), "Seed does not exist"); uint256 tokenId = getPrintTokenIdFromSeed(seed); uint256 oldSupply = totalSupply[tokenId]; // Get price to mint the next print uint256 printPrice = getPrintPrice(oldSupply + 1); require(msg.value >= printPrice, "Insufficient funds"); uint256 newSupply = totalSupply[tokenId].add(1); totalSupply[tokenId] = newSupply; // Update reserve - reserveCut == Price to burn next token uint256 reserveCut = getBurnPrice(newSupply); reserve = reserve.add(reserveCut); // Calculate fees - seedOwner gets 80% of fee (printPrice - reserveCut) uint256 seedOwnerRoyalty = _getSeedOwnerCut(printPrice.sub(reserveCut)); // Mint token _mint(msg.sender, tokenId, 1, ""); // Disburse royalties address seedOwner = seedToOwner[seed]; (bool success, ) = seedOwner.call{value: seedOwnerRoyalty}(""); require(success, "Payment failed"); // Remaining 20% kept for contract/Treum // If buyer sent extra ETH as padding in case another purchase was made they are refunded _refundSender(printPrice); emit PrintMinted(msg.sender, tokenId, seed, printPrice, getPrintPrice(newSupply.add(1)), reserveCut, newSupply, seedOwnerRoyalty, reserve, seedOwner); return tokenId; } /** * @dev Function to burn a print * @param seed The seed for the print to burn. * @param minimumSupply The minimum token supply for burn to succeed, this is a way to set slippage. * Set to 1 to allow burn to go through no matter what the price is. */ function burnPrint(uint256 seed, uint256 minimumSupply) public onlyWhenEnabled { require(seedToOwner[seed] != address(0), "Seed does not exist"); uint256 tokenId = getPrintTokenIdFromSeed(seed); uint256 oldSupply = totalSupply[tokenId]; require(oldSupply >= minimumSupply, 'Min supply not met'); uint256 burnPrice = getBurnPrice(oldSupply); uint256 newSupply = totalSupply[tokenId].sub(1); totalSupply[tokenId] = newSupply; // Update reserve reserve = reserve.sub(burnPrice); _burn(msg.sender, tokenId, 1); // Disburse funds (bool success, ) = msg.sender.call{value: burnPrice}(""); require(success, "Burn payment failed"); emit PrintBurned(msg.sender, tokenId, seed, burnPrice, getPrintPrice(oldSupply), getBurnPrice(newSupply), newSupply, reserve); } /***********************************| | Public Getters - Pricing | |__________________________________*/ /** * @dev Function to get print price * @param printNumber the print number of the print Ex. if there are 2 existing prints, and you want to get the * next print price, then this should be 3 as you are getting the price to mint the 3rd print */ function getPrintPrice(uint256 printNumber) public pure returns (uint256 price) { require(printNumber <= MAX_PRINT_SUPPLY, "Maximum supply exceeded"); uint256 decimals = 10 ** SIG_DIGITS; if (printNumber < B) { price = (10 ** ( B.sub(printNumber) )).mul(decimals).div(11 ** ( B.sub(printNumber))); } else if (printNumber == B) { price = decimals; // price = decimals * (A ^ 0) } else { price = (11 ** ( printNumber.sub(B) )).mul(decimals).div(10 ** ( printNumber.sub(B) )); } price = price.add(C.mul(printNumber)); price = price.sub(D); price = price.mul(1 ether).div(decimals); } /** * @dev Function to get funds received when burned * @param supply the supply of prints before burning. Ex. if there are 2 existing prints, to get the funds * receive on burn the supply should be 2 */ function getBurnPrice(uint256 supply) public pure returns (uint256 price) { uint256 printPrice = getPrintPrice(supply); price = printPrice * 90 / 100; // 90 % of print price } /***********************************| | Public Getters - Seed + Prints | |__________________________________*/ /** * @dev Get the number of prints minted for the corresponding seed * @param seed The seed/original NFT token id */ function seedToPrintsSupply(uint256 seed) public view returns (uint256) { uint256 tokenId = getPrintTokenIdFromSeed(seed); return totalSupply[tokenId]; } /** * @dev The token id for the prints contains the seed/original NFT id * @param seed The seed/original NFT token id */ function getPrintTokenIdFromSeed(uint256 seed) public pure returns (uint256) { return seed | PRINTS_FLAG_BIT; } /***********************************| | Public Getters - Metadata | |__________________________________*/ function getScriptAtIndex(uint256 index) public view returns (string memory) { require(index < scriptCount, "Index out of bounds"); return scripts[index]; } /** * @notice A distinct Uniform Resource Identifier (URI) for a given token. * @dev URIs are defined in RFC 3986. * URIs are assumed to be deterministically generated based on token ID * @return URI string */ function uri(uint256 _id) public override view returns (string memory) { return string(abi.encodePacked(_uri, _uint2str(_id), ".json")); } /***********************************| |Internal Functions - Generate Seed | |__________________________________*/ function _generateSeed(uint256 uniqueValue) internal view returns (uint256) { bytes32 hash = keccak256(abi.encodePacked(block.number, blockhash(block.number - 1), msg.sender, uniqueValue)); // gridLength 0-5 uint8 gridLength = uint8(hash[0]) % 6; // horizontalLever 0-58 uint8 horizontalLever = uint8(hash[1]) % 59; // diagonalLever 0-10 uint8 diagonalLever = uint8(hash[2]) % 11; // palette 4 0-11 uint8 palette = uint8(hash[3]) % 12; // innerShape 0-3 with rarity uint8 innerShape = _getRareTrait(uint8(hash[4]) % 9); return uint256(uint40(gridLength) << 32 | uint40(horizontalLever) << 24 | uint40(diagonalLever) << 16 | uint40(palette) << 8 | uint40(innerShape)); } function _getRareTrait(uint8 value) internal pure returns (uint8) { // 70% circle // 10% square; // 10% squareCircle; // 10% squareDiamond; if (value > 2) { return 3; } else { return value; } } /***********************************| | Internal Functions - Prints | |__________________________________*/ function _getSeedOwnerCut(uint256 fee) internal pure returns (uint256) { return fee.mul(8).div(10); } function _refundSender(uint256 printPrice) internal { if (msg.value.sub(printPrice) > 0) { (bool success, ) = msg.sender.call{value: msg.value.sub(printPrice)}(""); require(success, "Refund failed"); } } /***********************************| | Admin | |__________________________________*/ /** * @dev Set mint price for seed/original NFT * @param _mintPrice The cost of an original */ function setPrice(uint256 _mintPrice) public onlyOwner onlyWhenDisabled { mintPrice = _mintPrice; } function addScript(string memory _script) public onlyOwner onlyUnlocked { scripts[scriptCount] = _script; scriptCount = scriptCount.add(1); } function updateScript(string memory _script, uint256 index) public onlyOwner onlyUnlocked { require(index < scriptCount, "Index out of bounds"); scripts[index] = _script; } function resetScriptCount() public onlyOwner onlyUnlocked { scriptCount = 0; } /** * @dev Withdraw earned funds from original Nft sales and print fees. Cannot withdraw the reserve funds. */ function withdraw() public onlyOwner { uint256 withdrawableFunds = address(this).balance.sub(reserve); msg.sender.transfer(withdrawableFunds); } /** * @dev Function to enable/disable token minting * @param enabled The flag to turn minting on or off */ function setEnabled(bool enabled) public onlyOwner { _enabled = enabled; } /** * @dev Function to lock/unlock the on-chain metadata * @param locked The flag turn locked on */ function setLocked(bool locked) public onlyOwner onlyUnlocked { _locked = locked; } /** * @dev Function to update the base _uri for all tokens * @param newuri The base uri string */ function setURI(string memory newuri) public onlyOwner { _setURI(newuri); } /***********************************| | Hooks | |__________________________________*/ function _beforeTokenTransfer( address operator, address from, address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data ) internal virtual override { super._beforeTokenTransfer(operator, from, to, ids, amounts, data); for (uint256 i = 0; i < ids.length; i++) { // If token is original, keep track of owner so can send them fees if (ids[i] & PRINTS_FLAG_BIT != PRINTS_FLAG_BIT) { uint256 seed = ids[i]; seedToOwner[seed] = payable(to); } } } /***********************************| | Utility Internal Functions | |__________________________________*/ /** * @notice Convert uint256 to string * @param _i Unsigned integer to convert to string */ function _uint2str(uint256 _i) internal pure returns (string memory _uintAsString) { if (_i == 0) { return "0"; } uint256 j = _i; uint256 ii = _i; uint256 len; // Get number of bytes while (j != 0) { len++; j /= 10; } bytes memory bstr = new bytes(len); uint256 k = len - 1; // Get each individual ASCII while (ii != 0) { bstr[k--] = byte(uint8(48 + ii % 10)); ii /= 10; } // Convert to string return string(bstr); } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; import "../utils/Context.sol"; /** * @dev Contract module which provides a basic access control mechanism, where * there is an account (an owner) that can be granted exclusive access to * specific functions. * * By default, the owner account will be the one that deploys the contract. This * can later be changed with {transferOwnership}. * * This module is used through inheritance. It will make available the modifier * `onlyOwner`, which can be applied to your functions to restrict their use to * the owner. */ abstract contract Ownable is Context { address private _owner; event OwnershipTransferred(address indexed previousOwner, address indexed newOwner); /** * @dev Initializes the contract setting the deployer as the initial owner. */ constructor () internal { address msgSender = _msgSender(); _owner = msgSender; emit OwnershipTransferred(address(0), msgSender); } /** * @dev Returns the address of the current owner. */ function owner() public view virtual returns (address) { return _owner; } /** * @dev Throws if called by any account other than the owner. */ modifier onlyOwner() { require(owner() == _msgSender(), "Ownable: caller is not the owner"); _; } /** * @dev Leaves the contract without owner. It will not be possible to call * `onlyOwner` functions anymore. Can only be called by the current owner. * * NOTE: Renouncing ownership will leave the contract without an owner, * thereby removing any functionality that is only available to the owner. */ function renounceOwnership() public virtual onlyOwner { emit OwnershipTransferred(_owner, address(0)); _owner = address(0); } /** * @dev Transfers ownership of the contract to a new account (`newOwner`). * Can only be called by the current owner. */ function transferOwnership(address newOwner) public virtual onlyOwner { require(newOwner != address(0), "Ownable: new owner is the zero address"); emit OwnershipTransferred(_owner, newOwner); _owner = newOwner; } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; import "@openzeppelin/contracts/token/ERC1155/IERC1155.sol"; import "@openzeppelin/contracts/token/ERC1155/IERC1155MetadataURI.sol"; import "@openzeppelin/contracts/token/ERC1155/IERC1155Receiver.sol"; import "@openzeppelin/contracts/GSN/Context.sol"; import "@openzeppelin/contracts/introspection/ERC165.sol"; import "@openzeppelin/contracts/math/SafeMath.sol"; import "@openzeppelin/contracts/utils/Address.sol"; /** * * @dev CLONE OF THE BASIC ERC1155 CONTRACT FROM OPEN ZEPPELIN * Only changes made are changing the uri related variable and getter * to be internal and virtual. */ contract ERC1155 is Context, ERC165, IERC1155, IERC1155MetadataURI { using SafeMath for uint256; using Address for address; // Mapping from token ID to account balances mapping (uint256 => mapping(address => uint256)) private _balances; // Mapping from account to operator approvals mapping (address => mapping(address => bool)) private _operatorApprovals; // contract name string public name; // contract symbol string public symbol; // Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json string internal _uri; /* * bytes4(keccak256('balanceOf(address,uint256)')) == 0x00fdd58e * bytes4(keccak256('balanceOfBatch(address[],uint256[])')) == 0x4e1273f4 * bytes4(keccak256('setApprovalForAll(address,bool)')) == 0xa22cb465 * bytes4(keccak256('isApprovedForAll(address,address)')) == 0xe985e9c5 * bytes4(keccak256('safeTransferFrom(address,address,uint256,uint256,bytes)')) == 0xf242432a * bytes4(keccak256('safeBatchTransferFrom(address,address,uint256[],uint256[],bytes)')) == 0x2eb2c2d6 * * => 0x00fdd58e ^ 0x4e1273f4 ^ 0xa22cb465 ^ * 0xe985e9c5 ^ 0xf242432a ^ 0x2eb2c2d6 == 0xd9b67a26 */ bytes4 private constant _INTERFACE_ID_ERC1155 = 0xd9b67a26; /* * bytes4(keccak256('uri(uint256)')) == 0x0e89341c */ bytes4 private constant _INTERFACE_ID_ERC1155_METADATA_URI = 0x0e89341c; /** * @dev See {_setURI}. */ constructor (string memory name_, string memory symbol_, string memory uri_) { name = name_; symbol = symbol_; _setURI(uri_); // register the supported interfaces to conform to ERC1155 via ERC165 _registerInterface(_INTERFACE_ID_ERC1155); // register the supported interfaces to conform to ERC1155MetadataURI via ERC165 _registerInterface(_INTERFACE_ID_ERC1155_METADATA_URI); } /** * @dev See {IERC1155MetadataURI-uri}. * * This implementation returns the same URI for *all* token types. It relies * on the token type ID substitution mechanism * https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP]. * * Clients calling this function must replace the `\{id\}` substring with the * actual token type ID. */ function uri(uint256) external view virtual override returns (string memory) { return _uri; } /** * @dev See {IERC1155-balanceOf}. * * Requirements: * * - `account` cannot be the zero address. */ function balanceOf(address account, uint256 id) public view override returns (uint256) { require(account != address(0), "ERC1155: balance query for the zero address"); return _balances[id][account]; } /** * @dev See {IERC1155-balanceOfBatch}. * * Requirements: * * - `accounts` and `ids` must have the same length. */ function balanceOfBatch( address[] memory accounts, uint256[] memory ids ) public view override returns (uint256[] memory) { require(accounts.length == ids.length, "ERC1155: accounts and ids length mismatch"); uint256[] memory batchBalances = new uint256[](accounts.length); for (uint256 i = 0; i < accounts.length; ++i) { require(accounts[i] != address(0), "ERC1155: batch balance query for the zero address"); batchBalances[i] = _balances[ids[i]][accounts[i]]; } return batchBalances; } /** * @dev See {IERC1155-setApprovalForAll}. */ function setApprovalForAll(address operator, bool approved) public virtual override { require(_msgSender() != operator, "ERC1155: setting approval status for self"); _operatorApprovals[_msgSender()][operator] = approved; emit ApprovalForAll(_msgSender(), operator, approved); } /** * @dev See {IERC1155-isApprovedForAll}. */ function isApprovedForAll(address account, address operator) public view override returns (bool) { return _operatorApprovals[account][operator]; } /** * @dev See {IERC1155-safeTransferFrom}. */ function safeTransferFrom( address from, address to, uint256 id, uint256 amount, bytes memory data ) public virtual override { require(to != address(0), "ERC1155: transfer to the zero address"); require( from == _msgSender() || isApprovedForAll(from, _msgSender()), "ERC1155: caller is not owner nor approved" ); address operator = _msgSender(); _beforeTokenTransfer(operator, from, to, _asSingletonArray(id), _asSingletonArray(amount), data); _balances[id][from] = _balances[id][from].sub(amount, "ERC1155: insufficient balance for transfer"); _balances[id][to] = _balances[id][to].add(amount); emit TransferSingle(operator, from, to, id, amount); _doSafeTransferAcceptanceCheck(operator, from, to, id, amount, data); } /** * @dev See {IERC1155-safeBatchTransferFrom}. */ function safeBatchTransferFrom( address from, address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data ) public virtual override { require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch"); require(to != address(0), "ERC1155: transfer to the zero address"); require( from == _msgSender() || isApprovedForAll(from, _msgSender()), "ERC1155: transfer caller is not owner nor approved" ); address operator = _msgSender(); _beforeTokenTransfer(operator, from, to, ids, amounts, data); for (uint256 i = 0; i < ids.length; ++i) { uint256 id = ids[i]; uint256 amount = amounts[i]; _balances[id][from] = _balances[id][from].sub( amount, "ERC1155: insufficient balance for transfer" ); _balances[id][to] = _balances[id][to].add(amount); } emit TransferBatch(operator, from, to, ids, amounts); _doSafeBatchTransferAcceptanceCheck(operator, from, to, ids, amounts, data); } /** * @dev Sets a new URI for all token types, by relying on the token type ID * substitution mechanism * https://eips.ethereum.org/EIPS/eip-1155#metadata[defined in the EIP]. * * By this mechanism, any occurrence of the `\{id\}` substring in either the * URI or any of the amounts in the JSON file at said URI will be replaced by * clients with the token type ID. * * For example, the `https://token-cdn-domain/\{id\}.json` URI would be * interpreted by clients as * `https://token-cdn-domain/000000000000000000000000000000000000000000000000000000000004cce0.json` * for token type ID 0x4cce0. * * See {uri}. * * Because these URIs cannot be meaningfully represented by the {URI} event, * this function emits no events. */ function _setURI(string memory newuri) internal virtual { _uri = newuri; } /** * @dev Creates `amount` tokens of token type `id`, and assigns them to `account`. * * Emits a {TransferSingle} event. * * Requirements: * * - `account` cannot be the zero address. * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the * acceptance magic value. */ function _mint(address account, uint256 id, uint256 amount, bytes memory data) internal virtual { require(account != address(0), "ERC1155: mint to the zero address"); address operator = _msgSender(); _beforeTokenTransfer(operator, address(0), account, _asSingletonArray(id), _asSingletonArray(amount), data); _balances[id][account] = _balances[id][account].add(amount); emit TransferSingle(operator, address(0), account, id, amount); _doSafeTransferAcceptanceCheck(operator, address(0), account, id, amount, data); } /** * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_mint}. * * Requirements: * * - `ids` and `amounts` must have the same length. * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the * acceptance magic value. */ function _mintBatch(address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data) internal virtual { require(to != address(0), "ERC1155: mint to the zero address"); require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch"); address operator = _msgSender(); _beforeTokenTransfer(operator, address(0), to, ids, amounts, data); for (uint i = 0; i < ids.length; i++) { _balances[ids[i]][to] = amounts[i].add(_balances[ids[i]][to]); } emit TransferBatch(operator, address(0), to, ids, amounts); _doSafeBatchTransferAcceptanceCheck(operator, address(0), to, ids, amounts, data); } /** * @dev Destroys `amount` tokens of token type `id` from `account` * * Requirements: * * - `account` cannot be the zero address. * - `account` must have at least `amount` tokens of token type `id`. */ function _burn(address account, uint256 id, uint256 amount) internal virtual { require(account != address(0), "ERC1155: burn from the zero address"); address operator = _msgSender(); _beforeTokenTransfer(operator, account, address(0), _asSingletonArray(id), _asSingletonArray(amount), ""); _balances[id][account] = _balances[id][account].sub( amount, "ERC1155: burn amount exceeds balance" ); emit TransferSingle(operator, account, address(0), id, amount); } /** * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {_burn}. * * Requirements: * * - `ids` and `amounts` must have the same length. */ function _burnBatch(address account, uint256[] memory ids, uint256[] memory amounts) internal virtual { require(account != address(0), "ERC1155: burn from the zero address"); require(ids.length == amounts.length, "ERC1155: ids and amounts length mismatch"); address operator = _msgSender(); _beforeTokenTransfer(operator, account, address(0), ids, amounts, ""); for (uint i = 0; i < ids.length; i++) { _balances[ids[i]][account] = _balances[ids[i]][account].sub( amounts[i], "ERC1155: burn amount exceeds balance" ); } emit TransferBatch(operator, account, address(0), ids, amounts); } /** * @dev Hook that is called before any token transfer. This includes minting * and burning, as well as batched variants. * * The same hook is called on both single and batched variants. For single * transfers, the length of the `id` and `amount` arrays will be 1. * * Calling conditions (for each `id` and `amount` pair): * * - When `from` and `to` are both non-zero, `amount` of ``from``'s tokens * of token type `id` will be transferred to `to`. * - When `from` is zero, `amount` tokens of token type `id` will be minted * for `to`. * - when `to` is zero, `amount` of ``from``'s tokens of token type `id` * will be burned. * - `from` and `to` are never both zero. * - `ids` and `amounts` have the same, non-zero length. * * To learn more about hooks, head to xref:ROOT:extending-contracts.adoc#using-hooks[Using Hooks]. */ function _beforeTokenTransfer( address operator, address from, address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data ) internal virtual { } function _doSafeTransferAcceptanceCheck( address operator, address from, address to, uint256 id, uint256 amount, bytes memory data ) private { if (to.isContract()) { try IERC1155Receiver(to).onERC1155Received(operator, from, id, amount, data) returns (bytes4 response) { if (response != IERC1155Receiver(to).onERC1155Received.selector) { revert("ERC1155: ERC1155Receiver rejected tokens"); } } catch Error(string memory reason) { revert(reason); } catch { revert("ERC1155: transfer to non ERC1155Receiver implementer"); } } } function _doSafeBatchTransferAcceptanceCheck( address operator, address from, address to, uint256[] memory ids, uint256[] memory amounts, bytes memory data ) private { if (to.isContract()) { try IERC1155Receiver(to).onERC1155BatchReceived(operator, from, ids, amounts, data) returns (bytes4 response) { if (response != IERC1155Receiver(to).onERC1155BatchReceived.selector) { revert("ERC1155: ERC1155Receiver rejected tokens"); } } catch Error(string memory reason) { revert(reason); } catch { revert("ERC1155: transfer to non ERC1155Receiver implementer"); } } } function _asSingletonArray(uint256 element) private pure returns (uint256[] memory) { uint256[] memory array = new uint256[](1); array[0] = element; return array; } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; /* * @dev Provides information about the current execution context, including the * sender of the transaction and its data. While these are generally available * via msg.sender and msg.data, they should not be accessed in such a direct * manner, since when dealing with GSN meta-transactions the account sending and * paying for execution may not be the actual sender (as far as an application * is concerned). * * This contract is only required for intermediate, library-like contracts. */ abstract contract Context { function _msgSender() internal view virtual returns (address payable) { return msg.sender; } function _msgData() internal view virtual returns (bytes memory) { this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691 return msg.data; } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.2 <0.8.0; import "../../introspection/IERC165.sol"; /** * @dev Required interface of an ERC1155 compliant contract, as defined in the * https://eips.ethereum.org/EIPS/eip-1155[EIP]. * * _Available since v3.1._ */ interface IERC1155 is IERC165 { /** * @dev Emitted when `value` tokens of token type `id` are transferred from `from` to `to` by `operator`. */ event TransferSingle(address indexed operator, address indexed from, address indexed to, uint256 id, uint256 value); /** * @dev Equivalent to multiple {TransferSingle} events, where `operator`, `from` and `to` are the same for all * transfers. */ event TransferBatch(address indexed operator, address indexed from, address indexed to, uint256[] ids, uint256[] values); /** * @dev Emitted when `account` grants or revokes permission to `operator` to transfer their tokens, according to * `approved`. */ event ApprovalForAll(address indexed account, address indexed operator, bool approved); /** * @dev Emitted when the URI for token type `id` changes to `value`, if it is a non-programmatic URI. * * If an {URI} event was emitted for `id`, the standard * https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[guarantees] that `value` will equal the value * returned by {IERC1155MetadataURI-uri}. */ event URI(string value, uint256 indexed id); /** * @dev Returns the amount of tokens of token type `id` owned by `account`. * * Requirements: * * - `account` cannot be the zero address. */ function balanceOf(address account, uint256 id) external view returns (uint256); /** * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {balanceOf}. * * Requirements: * * - `accounts` and `ids` must have the same length. */ function balanceOfBatch(address[] calldata accounts, uint256[] calldata ids) external view returns (uint256[] memory); /** * @dev Grants or revokes permission to `operator` to transfer the caller's tokens, according to `approved`, * * Emits an {ApprovalForAll} event. * * Requirements: * * - `operator` cannot be the caller. */ function setApprovalForAll(address operator, bool approved) external; /** * @dev Returns true if `operator` is approved to transfer ``account``'s tokens. * * See {setApprovalForAll}. */ function isApprovedForAll(address account, address operator) external view returns (bool); /** * @dev Transfers `amount` tokens of token type `id` from `from` to `to`. * * Emits a {TransferSingle} event. * * Requirements: * * - `to` cannot be the zero address. * - If the caller is not `from`, it must be have been approved to spend ``from``'s tokens via {setApprovalForAll}. * - `from` must have a balance of tokens of type `id` of at least `amount`. * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155Received} and return the * acceptance magic value. */ function safeTransferFrom(address from, address to, uint256 id, uint256 amount, bytes calldata data) external; /** * @dev xref:ROOT:erc1155.adoc#batch-operations[Batched] version of {safeTransferFrom}. * * Emits a {TransferBatch} event. * * Requirements: * * - `ids` and `amounts` must have the same length. * - If `to` refers to a smart contract, it must implement {IERC1155Receiver-onERC1155BatchReceived} and return the * acceptance magic value. */ function safeBatchTransferFrom(address from, address to, uint256[] calldata ids, uint256[] calldata amounts, bytes calldata data) external; }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.2 <0.8.0; import "./IERC1155.sol"; /** * @dev Interface of the optional ERC1155MetadataExtension interface, as defined * in the https://eips.ethereum.org/EIPS/eip-1155#metadata-extensions[EIP]. * * _Available since v3.1._ */ interface IERC1155MetadataURI is IERC1155 { /** * @dev Returns the URI for token type `id`. * * If the `\{id\}` substring is present in the URI, it must be replaced by * clients with the actual token type ID. */ function uri(uint256 id) external view returns (string memory); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; import "../../introspection/IERC165.sol"; /** * _Available since v3.1._ */ interface IERC1155Receiver is IERC165 { /** @dev Handles the receipt of a single ERC1155 token type. This function is called at the end of a `safeTransferFrom` after the balance has been updated. To accept the transfer, this must return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` (i.e. 0xf23a6e61, or its own function selector). @param operator The address which initiated the transfer (i.e. msg.sender) @param from The address which previously owned the token @param id The ID of the token being transferred @param value The amount of tokens being transferred @param data Additional data with no specified format @return `bytes4(keccak256("onERC1155Received(address,address,uint256,uint256,bytes)"))` if transfer is allowed */ function onERC1155Received( address operator, address from, uint256 id, uint256 value, bytes calldata data ) external returns(bytes4); /** @dev Handles the receipt of a multiple ERC1155 token types. This function is called at the end of a `safeBatchTransferFrom` after the balances have been updated. To accept the transfer(s), this must return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` (i.e. 0xbc197c81, or its own function selector). @param operator The address which initiated the batch transfer (i.e. msg.sender) @param from The address which previously owned the token @param ids An array containing ids of each token being transferred (order and length must match values array) @param values An array containing amounts of each token being transferred (order and length must match ids array) @param data Additional data with no specified format @return `bytes4(keccak256("onERC1155BatchReceived(address,address,uint256[],uint256[],bytes)"))` if transfer is allowed */ function onERC1155BatchReceived( address operator, address from, uint256[] calldata ids, uint256[] calldata values, bytes calldata data ) external returns(bytes4); }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; import "../utils/Context.sol";
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; import "./IERC165.sol"; /** * @dev Implementation of the {IERC165} interface. * * Contracts may inherit from this and call {_registerInterface} to declare * their support of an interface. */ abstract 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) public view virtual override 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 virtual { require(interfaceId != 0xffffffff, "ERC165: invalid interface id"); _supportedInterfaces[interfaceId] = true; } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; /** * @dev Wrappers over Solidity's arithmetic operations with added overflow * checks. * * Arithmetic operations in Solidity wrap on overflow. This can easily result * in bugs, because programmers usually assume that an overflow raises an * error, which is the standard behavior in high level programming languages. * `SafeMath` restores this intuition by reverting the transaction when an * operation overflows. * * Using this library instead of the unchecked operations eliminates an entire * class of bugs, so it's recommended to use it always. */ library SafeMath { /** * @dev Returns the addition of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) { uint256 c = a + b; if (c < a) return (false, 0); return (true, c); } /** * @dev Returns the substraction of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b > a) return (false, 0); return (true, a - b); } /** * @dev Returns the multiplication of two unsigned integers, with an overflow flag. * * _Available since v3.4._ */ function tryMul(uint256 a, uint256 b) internal pure returns (bool, 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 (true, 0); uint256 c = a * b; if (c / a != b) return (false, 0); return (true, c); } /** * @dev Returns the division of two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b == 0) return (false, 0); return (true, a / b); } /** * @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag. * * _Available since v3.4._ */ function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) { if (b == 0) return (false, 0); return (true, a % b); } /** * @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) { require(b <= a, "SafeMath: subtraction overflow"); return a - b; } /** * @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) { 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, reverting 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) { require(b > 0, "SafeMath: division by zero"); return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting 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) { require(b > 0, "SafeMath: modulo by zero"); return a % b; } /** * @dev Returns the subtraction of two unsigned integers, reverting with custom message on * overflow (when the result is negative). * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {trySub}. * * Counterpart to Solidity's `-` operator. * * Requirements: * * - Subtraction cannot overflow. */ function sub(uint256 a, uint256 b, string memory errorMessage) internal pure returns (uint256) { require(b <= a, errorMessage); return a - b; } /** * @dev Returns the integer division of two unsigned integers, reverting with custom message on * division by zero. The result is rounded towards zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryDiv}. * * 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, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); return a / b; } /** * @dev Returns the remainder of dividing two unsigned integers. (unsigned integer modulo), * reverting with custom message when dividing by zero. * * CAUTION: This function is deprecated because it requires allocating memory for the error * message unnecessarily. For custom revert reasons use {tryMod}. * * 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, string memory errorMessage) internal pure returns (uint256) { require(b > 0, errorMessage); return a % b; } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.2 <0.8.0; /** * @dev Collection of functions related to the address type */ library Address { /** * @dev Returns true if `account` is 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. * * Among others, `isContract` will return false for the following * types of addresses: * * - an externally-owned account * - a contract in construction * - an address where a contract will be created * - an address where a contract lived, but was destroyed * ==== */ function isContract(address account) internal view returns (bool) { // This method relies on extcodesize, which returns 0 for contracts in // construction, since the code is only stored at the end of the // constructor execution. uint256 size; // solhint-disable-next-line no-inline-assembly assembly { size := extcodesize(account) } return size > 0; } /** * @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]. */ function sendValue(address payable recipient, uint256 amount) internal { require(address(this).balance >= amount, "Address: insufficient balance"); // solhint-disable-next-line avoid-low-level-calls, avoid-call-value (bool success, ) = recipient.call{ value: amount }(""); require(success, "Address: unable to send value, recipient may have reverted"); } /** * @dev Performs a Solidity function call using a low level `call`. A * plain`call` is an unsafe replacement for a function call: use this * function instead. * * If `target` reverts with a revert reason, it is bubbled up by this * function (like regular Solidity function calls). * * Returns the raw returned data. To convert to the expected return value, * use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`]. * * Requirements: * * - `target` must be a contract. * - calling `target` with `data` must not revert. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data) internal returns (bytes memory) { return functionCall(target, data, "Address: low-level call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with * `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { return functionCallWithValue(target, data, 0, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but also transferring `value` wei to `target`. * * Requirements: * * - the calling contract must have an ETH balance of at least `value`. * - the called Solidity function must be `payable`. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) { return functionCallWithValue(target, data, value, "Address: low-level call with value failed"); } /** * @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but * with `errorMessage` as a fallback revert reason when `target` reverts. * * _Available since v3.1._ */ function functionCallWithValue(address target, bytes memory data, uint256 value, string memory errorMessage) internal returns (bytes memory) { require(address(this).balance >= value, "Address: insufficient balance for call"); require(isContract(target), "Address: call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.call{ value: value }(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) { return functionStaticCall(target, data, "Address: low-level static call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a static call. * * _Available since v3.3._ */ function functionStaticCall(address target, bytes memory data, string memory errorMessage) internal view returns (bytes memory) { require(isContract(target), "Address: static call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.staticcall(data); return _verifyCallResult(success, returndata, errorMessage); } /** * @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) { return functionDelegateCall(target, data, "Address: low-level delegate call failed"); } /** * @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`], * but performing a delegate call. * * _Available since v3.4._ */ function functionDelegateCall(address target, bytes memory data, string memory errorMessage) internal returns (bytes memory) { require(isContract(target), "Address: delegate call to non-contract"); // solhint-disable-next-line avoid-low-level-calls (bool success, bytes memory returndata) = target.delegatecall(data); return _verifyCallResult(success, returndata, errorMessage); } function _verifyCallResult(bool success, bytes memory returndata, string memory errorMessage) private pure returns(bytes memory) { if (success) { return returndata; } else { // Look for revert reason and bubble it up if present if (returndata.length > 0) { // The easiest way to bubble the revert reason is using memory via assembly // solhint-disable-next-line no-inline-assembly assembly { let returndata_size := mload(returndata) revert(add(32, returndata), returndata_size) } } else { revert(errorMessage); } } } }
// SPDX-License-Identifier: MIT pragma solidity >=0.6.0 <0.8.0; /** * @dev Interface of the ERC165 standard, as defined in the * https://eips.ethereum.org/EIPS/eip-165[EIP]. * * Implementers can declare support of contract interfaces, which can then be * queried by others ({ERC165Checker}). * * For an implementation, see {ERC165}. */ 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); }
{ "optimizer": { "enabled": true, "runs": 200 }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "abi" ] } }, "libraries": {} }
Contract Security Audit
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[{"inputs":[{"internalType":"string","name":"_uri","type":"string"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"account","type":"address"},{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":false,"internalType":"bool","name":"approved","type":"bool"}],"name":"ApprovalForAll","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"seed","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"originalsMinted","type":"uint256"}],"name":"MintOriginal","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"seed","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"priceReceived","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"nextPrintPrice","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"nextBurnPrice","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"printsSupply","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"reserve","type":"uint256"}],"name":"PrintBurned","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":true,"internalType":"uint256","name":"seed","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"pricePaid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"nextPrintPrice","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"nextBurnPrice","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"printsSupply","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"royaltyPaid","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"reserve","type":"uint256"},{"indexed":true,"internalType":"address","name":"royaltyRecipient","type":"address"}],"name":"PrintMinted","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256[]","name":"ids","type":"uint256[]"},{"indexed":false,"internalType":"uint256[]","name":"values","type":"uint256[]"}],"name":"TransferBatch","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"operator","type":"address"},{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"id","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"TransferSingle","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"string","name":"value","type":"string"},{"indexed":true,"internalType":"uint256","name":"id","type":"uint256"}],"name":"URI","type":"event"},{"inputs":[{"internalType":"string","name":"_script","type":"string"}],"name":"addScript","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"id","type":"uint256"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address[]","name":"accounts","type":"address[]"},{"internalType":"uint256[]","name":"ids","type":"uint256[]"}],"name":"balanceOfBatch","outputs":[{"internalType":"uint256[]","name":"","type":"uint256[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"seed","type":"uint256"},{"internalType":"uint256","name":"minimumSupply","type":"uint256"}],"name":"burnPrint","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"supply","type":"uint256"}],"name":"getBurnPrice","outputs":[{"internalType":"uint256","name":"price","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint256","name":"printNumber","type":"uint256"}],"name":"getPrintPrice","outputs":[{"internalType":"uint256","name":"price","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint256","name":"seed","type":"uint256"}],"name":"getPrintTokenIdFromSeed","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"uint256","name":"index","type":"uint256"}],"name":"getScriptAtIndex","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"address","name":"operator","type":"address"}],"name":"isApprovedForAll","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"mint","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"mintPrice","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"seed","type":"uint256"}],"name":"mintPrint","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"payable","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"originalsMinted","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"reserve","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"resetScriptCount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256[]","name":"ids","type":"uint256[]"},{"internalType":"uint256[]","name":"amounts","type":"uint256[]"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"safeBatchTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"from","type":"address"},{"internalType":"address","name":"to","type":"address"},{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"bytes","name":"data","type":"bytes"}],"name":"safeTransferFrom","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"scriptCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"seedToOwner","outputs":[{"internalType":"address payable","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"seed","type":"uint256"}],"name":"seedToPrintsSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"operator","type":"address"},{"internalType":"bool","name":"approved","type":"bool"}],"name":"setApprovalForAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"enabled","type":"bool"}],"name":"setEnabled","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bool","name":"locked","type":"bool"}],"name":"setLocked","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_mintPrice","type":"uint256"}],"name":"setPrice","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"newuri","type":"string"}],"name":"setURI","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"interfaceId","type":"bytes4"}],"name":"supportsInterface","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"string","name":"_script","type":"string"},{"internalType":"uint256","name":"index","type":"uint256"}],"name":"updateScript","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_id","type":"uint256"}],"name":"uri","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"withdraw","outputs":[],"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)
0000000000000000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000000000000002868747470733a2f2f6170692e65756c657262656174732e636f6d2f6170692f6d657461646174612f000000000000000000000000000000000000000000000000
-----Decoded View---------------
Arg [0] : _uri (string): https://api.eulerbeats.com/api/metadata/
-----Encoded View---------------
4 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000020
Arg [1] : 0000000000000000000000000000000000000000000000000000000000000028
Arg [2] : 68747470733a2f2f6170692e65756c657262656174732e636f6d2f6170692f6d
Arg [3] : 657461646174612f000000000000000000000000000000000000000000000000
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OVERVIEW
Each EulerBeat NFT is a generative visual & audio art piece. Each Print has a value backed by Eth on a bonding curve. Check EulerBeats.com on the current value of each Print before transacting on OpenSea.Loading...
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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.