Contract 0xa98771a46Dcb34B34cDAD5355718F8a97C8E603e 4

 
 
Txn Hash
Method
Block
From
To
Value
0x1ddbe9750ffd45cb4afaa470503b6e74eab558d9ec1bee0c732f9b7dbb175e24Set Approval For...153437992022-08-15 3:53:0521 hrs 47 mins ago0x081ce5d81b8941af8e02c808e00a2344fc96fb79 IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00057548 12.‍47455031
0xce25deb5923b5bb8e638295af46dccc9d12d1acb36d704f43dc591edc0443f75Set Approval For...153277282022-08-12 15:18:313 days 10 hrs agoENS Name markstevens.eth IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00156442 33.‍91129079
0x5130d9e9e129914d6426bd5f841962e5fe2105fd449dd4d6bac87ddc887c2196Burn Print153207572022-08-11 12:37:124 days 13 hrs ago0xb5f6e7795418b889a12698be251c05007d1a1369 IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00166417 31.‍42742736
0x5dc986c6ff363ed014c9baba63b1a6aeb0620302aefea09d5c35ec1b5ceb3b4cBurn Print153131822022-08-10 8:05:165 days 17 hrs agoENS Name dfmerin.eth IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00064725 12.‍22870692
0x8f1cbd3308a415516064efb4c25e211b1720a5f2d5dcf897dc7dc6a90da803d2Set Approval For...153121072022-08-10 3:52:405 days 21 hrs agoENS Name paigufan.eth IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00044892 9.‍71347435
0x73fe89726e5be46b959fda8d69f0a1a6f325706aa9e5c7180dbfcb233eee6a9eSet Approval For...153044442022-08-08 23:05:497 days 2 hrs agoENS Name 5665.eth IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00064739 14.‍03328615
0x5b03d70af5669095a7f1ac8dfc9ecb13e506d0b136a10072c5e68001e69bf58eSet Approval For...152701712022-08-03 15:10:2612 days 10 hrs ago0x50dd57f50a17d57304e7a4f262da30beb31c2e87 IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00080065 17.‍35537428
0x43b5417ba99bcd7d67f04bfa185bb4013b54df8c616a9db0c8f85b937563c3afBurn Print152361182022-07-29 7:51:2817 days 17 hrs agoENS Name obok.eth IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00083406 15.‍74753949
0xc8e9245e13143b192ba015e55851672b4555c075db442e5b9229b9a2d4169e0aBurn Print152361152022-07-29 7:50:0717 days 17 hrs agoENS Name obok.eth IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00088553 16.‍72310676
0x0d9784fd293d04839950be39e8cc4258849249df8ec6f0061da7c07318518883Set Approval For...152054272022-07-24 12:57:3622 days 12 hrs ago0x929a76bce274727e5879233f9fee4b622d3762de IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00050108 10.‍84192496
0xfd44245d8b7e1ff2da3e1fbf77df7d203a860c04aef32468229983dabf84b4d2Burn Print151897672022-07-22 2:37:1124 days 23 hrs agoENS Name gapview.eth IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00050465 9.‍52806054
0x3001e3e6b643a3f3a345c737f545fd14e520f5c59205cc7ba8835c95ebe56249Burn Print151638942022-07-18 2:22:5128 days 23 hrs ago0xb1db075498603e51df729dd36e7335b25022ff30 IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00120693 22.‍80293466
0xc9aaf3cdc647b34e84b4be2f012e80179ee9341eb134cc49c8900583d649e6c0Burn Print151638872022-07-18 2:21:5528 days 23 hrs ago0xb1db075498603e51df729dd36e7335b25022ff30 IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00170983 32.‍28238688
0x2c32f461d3b21ec452fecac431098f2819be9c399e5f1d6e703f213a4b3b018eSafe Transfer Fr...151637982022-07-18 1:59:5028 days 23 hrs ago0xb2c78afa45e6035f58fe157421afe4bb4c6cc9ea IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00050908 9.‍78213166
0x5edc14b64bbc7449c7bb88fc60053bad55e344cf00105b1dd0994b2d71da19b9Burn Print151539262022-07-16 13:06:3530 days 12 hrs ago0xffe271fc41ecce146e14e518561b6943fe056978 IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00122336 23.‍10816929
0x83fbbef986297ab164c1e3535bc370a96bd108688869f77bb643290641ea98deBurn Print150963912022-07-07 16:02:1339 days 9 hrs agoENS Name emcase.eth IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00453479 85.‍65746807
0x32197e12dd137d3f85bf7ab3902a2766436657f392145da1309a36a41a1b0d27Burn Print150963862022-07-07 16:00:1439 days 9 hrs agoENS Name emcase.eth IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00306773 57.‍94624668
0x4b20bc4c218b54eb909b746ecfbd258c6d0b0beabb1d252f6ac1781935f31210Burn Print150959882022-07-07 14:31:3339 days 11 hrs agoENS Name nonfungibletoking.eth IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍0039729 75.‍00991874
0x6b8a8355323460aa91d304dce1ee3ff25d68879d969f57ea263ee645563ba173Set Approval For...150593802022-07-01 22:58:4745 days 2 hrs ago0x718c8e761d26514e7b1d4f989438b9cb41b9e31a IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00068685 28.‍25984293
0xd0559bbe99aa8ff49d41a072dba1fc94a44f471e009f65fc8fe2b4c2ef0f7be2Burn Print150575732022-07-01 16:14:3145 days 9 hrs ago0xb1db075498603e51df729dd36e7335b25022ff30 IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00447821 84.‍56967071
0xfe2a0fad6a6f890be6b5c020729f711ae21798acdea5abf639f4b81659548e9eBurn Print150540462022-07-01 3:00:2645 days 22 hrs ago0xbada235e37f8ceba768cb167518c869a3765992c IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00130433 24.‍63190215
0x403b3e2cccd0eedab78ddf9aa9c512b9c4651ba970427caa30be54850eb5cd14Set Approval For...149901082022-06-19 9:43:4457 days 15 hrs agoENS Name prettycat.eth IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00087281 18.‍88511761
0xda02c3aed1ac2a1726df631b0c54e0d9ecdc8ce2e3d927d4477db4540c4976c7Burn Print149481202022-06-12 4:10:4164 days 21 hrs ago0xf1984dd40cde6227df2f0a503c8bc9aa8380d87f IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00157436 29.‍73145182
0xe9fb3e9ab0e79835766acbddc0835ed16db871a2429d014bf99f03a228e0c231Burn Print149481202022-06-12 4:10:4164 days 21 hrs ago0xf1984dd40cde6227df2f0a503c8bc9aa8380d87f IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00157472 29.‍73145182
0x24e0732f9c0873a52b23544eefae7a19f849d1c8ddf4b8a0f6e5748b79b74463Burn Print149480882022-06-12 4:03:0064 days 21 hrs ago0xf1984dd40cde6227df2f0a503c8bc9aa8380d87f IN  0xa98771a46dcb34b34cdad5355718f8a97c8e603e0 Ether0.‍00226637 42.‍79982117
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Latest 25 internal transaction
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0x5130d9e9e129914d6426bd5f841962e5fe2105fd449dd4d6bac87ddc887c2196153207572022-08-11 12:37:124 days 13 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603e0xb5f6e7795418b889a12698be251c05007d1a13690.‍924 Ether
0x5dc986c6ff363ed014c9baba63b1a6aeb0620302aefea09d5c35ec1b5ceb3b4c153131822022-08-10 8:05:165 days 17 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603eENS Name dfmerin.eth0.‍924 Ether
0xb481fb4d4cc16da603b7f6f60a3f14816073417dcd1fdcda53d0b4d0ecb19b61152641342022-08-02 16:23:4313 days 9 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603e 0x0fcb8ecf48d327d8da77a92e63bce07ec17f636d0.‍664 Ether
0x43b5417ba99bcd7d67f04bfa185bb4013b54df8c616a9db0c8f85b937563c3af152361182022-07-29 7:51:2817 days 17 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603eENS Name obok.eth1.‍008 Ether
0xc8e9245e13143b192ba015e55851672b4555c075db442e5b9229b9a2d4169e0a152361152022-07-29 7:50:0717 days 17 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603eENS Name obok.eth0.‍84 Ether
0xfd44245d8b7e1ff2da3e1fbf77df7d203a860c04aef32468229983dabf84b4d2151897672022-07-22 2:37:1124 days 23 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603eENS Name gapview.eth0.‍84 Ether
0x3001e3e6b643a3f3a345c737f545fd14e520f5c59205cc7ba8835c95ebe56249151638942022-07-18 2:22:5128 days 23 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603e0xb1db075498603e51df729dd36e7335b25022ff301.‍008 Ether
0xc9aaf3cdc647b34e84b4be2f012e80179ee9341eb134cc49c8900583d649e6c0151638872022-07-18 2:21:5528 days 23 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603e0xb1db075498603e51df729dd36e7335b25022ff301.‍932 Ether
0x5edc14b64bbc7449c7bb88fc60053bad55e344cf00105b1dd0994b2d71da19b9151539262022-07-16 13:06:3530 days 12 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603e0xffe271fc41ecce146e14e518561b6943fe0569780.‍84 Ether
0x83fbbef986297ab164c1e3535bc370a96bd108688869f77bb643290641ea98de150963912022-07-07 16:02:1339 days 9 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603eENS Name emcase.eth0.‍756 Ether
0x32197e12dd137d3f85bf7ab3902a2766436657f392145da1309a36a41a1b0d27150963862022-07-07 16:00:1439 days 9 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603eENS Name emcase.eth0.‍588 Ether
0x4b20bc4c218b54eb909b746ecfbd258c6d0b0beabb1d252f6ac1781935f31210150959882022-07-07 14:31:3339 days 11 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603eENS Name nonfungibletoking.eth0.‍924 Ether
0xd0559bbe99aa8ff49d41a072dba1fc94a44f471e009f65fc8fe2b4c2ef0f7be2150575732022-07-01 16:14:3145 days 9 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603e0xb1db075498603e51df729dd36e7335b25022ff300.‍84 Ether
0xfe2a0fad6a6f890be6b5c020729f711ae21798acdea5abf639f4b81659548e9e150540462022-07-01 3:00:2645 days 22 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603e0xbada235e37f8ceba768cb167518c869a3765992c0.‍756 Ether
0xda02c3aed1ac2a1726df631b0c54e0d9ecdc8ce2e3d927d4477db4540c4976c7149481202022-06-12 4:10:4164 days 21 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603e0xf1984dd40cde6227df2f0a503c8bc9aa8380d87f0.‍924 Ether
0xe9fb3e9ab0e79835766acbddc0835ed16db871a2429d014bf99f03a228e0c231149481202022-06-12 4:10:4164 days 21 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603e0xf1984dd40cde6227df2f0a503c8bc9aa8380d87f1.‍092 Ether
0x24e0732f9c0873a52b23544eefae7a19f849d1c8ddf4b8a0f6e5748b79b74463149480882022-06-12 4:03:0064 days 21 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603e0xf1984dd40cde6227df2f0a503c8bc9aa8380d87f0.‍924 Ether
0xafd88f6a60f9fd962fdef0e355605a06ab8ce8fd120579ac05fd9c76dc10f2ab149346832022-06-09 21:07:2767 days 4 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603eENS Name dizifrish.eth0.‍924 Ether
0x3ca4d092fb19933d373dcbb7836d83a678adaf75f0bfb13f376491ed6d4fa318148870302022-06-01 21:01:4475 days 4 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603eENS Name sansoucie.eth0.‍756 Ether
0x5dcf94cf0222b07e58f7a3108d6db67566162c58ab608903dc5c55c348328cdc148538482022-05-27 11:14:5380 days 14 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603eENS Name drdbln.eth1.‍008 Ether
0xc06d00c4c7400cf824cebd10914df38f29f6645462120f7fff037fa20231583e148276092022-05-23 4:56:0184 days 20 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603e0x081ce5d81b8941af8e02c808e00a2344fc96fb791.‍092 Ether
0x38c50da375c44d02f1092c8158f7f4772099e79d2fe75e0531e95c9b6c7644d2148275662022-05-23 4:46:5884 days 20 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603e0x081ce5d81b8941af8e02c808e00a2344fc96fb790.‍672 Ether
0x98c7009457a4c4f6a727c85553ec8bb95824829013e0bc9952e3f755d2d0b4cc148275642022-05-23 4:46:4584 days 20 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603e0x081ce5d81b8941af8e02c808e00a2344fc96fb790.‍756 Ether
0x7d9c516199c64aed067c86a7a6cda5a5dca902e45f0c678cba59cb2127d68449148275512022-05-23 4:44:5284 days 20 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603e0x081ce5d81b8941af8e02c808e00a2344fc96fb790.‍84 Ether
0x8794d5c8566c1b5ca26c832f2c91059a0f2824aa9fae41fd3b99562c47b5b5eb148275482022-05-23 4:43:5284 days 20 hrs ago 0xa98771a46dcb34b34cdad5355718f8a97c8e603e0x081ce5d81b8941af8e02c808e00a2344fc96fb790.‍924 Ether
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Contract Source Code Verified (Exact Match)

Contract Name:
EulerBeatsV2

Compiler Version
v0.7.6+commit.7338295f

Optimization Enabled:
Yes with 200 runs

Other Settings:
default evmVersion
File 1 of 16 : EulerBeatsV2.sol
// Copyright © 2021 Treum.io, a ConsenSys AG company. All rights reserved.
// BY USING THIS SMART CONTRACT, INCLUDING TO BUY, SELL, CREATE, BURN OR USE TOKENS, YOU AGREE TO EULERBEATS’ TERMS OF SERVICE, AVAILABLE HERE: HTTPS://EULERBEATS.COM/TERMS-OF-SERVICE AND IN THE TRANSACTION DATA OF 0x56ff8befa16e6720f9cf54146c9c5e3be9a1258fd910fe55c287f19ad80b8bc1
// SHA256 of artwork generation script: 65301d8425ba637bdb6328a17dbe7440bf1c7f5032879aad4c00bfa09bddf93f

pragma solidity =0.7.6;

import "@openzeppelin/contracts/access/Ownable.sol";
import "@openzeppelin/contracts/token/ERC1155/ERC1155.sol";
import "@openzeppelin/contracts/utils/ReentrancyGuard.sol";
import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/utils/Strings.sol";

import "./RoyaltyDistributor.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 EulerBeatsV2 is Ownable, ERC1155, ReentrancyGuard, RoyaltyDistributor {
    using SafeMath for uint256;
    using Strings for uint256;
    using Address for address payable;

    /***********************************|
    |        Variables and Events       |
    |__________________________________*/
    // For Mint, mintPrint, and burnPrint: locks the prices
    bool public mintPrintEnabled = false;
    bool public burnPrintEnabled = false;
    bool public mintEnabled = false;
    bool private _contractMintPrintEnabled = false;

    // For metadata (scripts), when locked it is irreversible
    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) public scripts;

    // The bit flag to distinguish prints
    uint256 constant public PRINTS_FLAG_BIT = 1;
    // Supply restriction on prints
    uint256 constant public MAX_PRINT_SUPPLY = 160;
    // Supply restriction on seeds/original NFTs
    uint256 constant public MAX_SEEDS_SUPPLY = 27;

    // Total supply of prints and original NFTs
    mapping(uint256 => uint256) public totalSupply;
    // Total number of original NFTs minted
    uint256 public originalsMinted = 0;
    // Funds reserved for burns
    uint256 public reserve = 0;

    // Contract name
    string public name;
    // Contract symbol
    string public symbol;

    // Constants for bonding curve pricing
    uint256 constant public A = 12;
    uint256 constant public B = 140;
    uint256 constant public C = 100;
    uint256 constant public SIG_DIGITS = 3;

    // Base uri for overriding ERC1155's uri getter
    string internal _baseURI;

    /**
     * @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 _name, string memory _symbol, string memory _uri) ERC1155("") {
        name = _name;
        symbol = _symbol;
        _baseURI = _uri;
    }


    /***********************************|
    |        Modifiers                  |
    |__________________________________*/

    modifier onlyWhenMintEnabled() {
        require(mintEnabled, "Minting originals is disabled");
        _;
    }
    modifier onlyWhenMintPrintEnabled() {
        require(mintPrintEnabled, "Minting prints is disabled");
        _;
    }
    modifier onlyWhenBurnPrintEnabled() {
        require(burnPrintEnabled, "Burning prints is disabled");
        _;
    }
    modifier onlyUnlocked() {
        require(!_locked, "Contract is locked");
        _;
    }


    /***********************************|
    |        User Interactions          |
    |__________________________________*/

    /**
     * @dev Function to mint tokens. Not payable for V2, restricted to owner
     */
    function mint() external onlyOwner onlyWhenMintEnabled returns (uint256) {
        uint256 newOriginalsSupply = originalsMinted.add(1);
        require(
            newOriginalsSupply <= MAX_SEEDS_SUPPLY,
            "Max supply reached"
        );

        // 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] = totalSupply[seed].add(1);
        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
     * @param _owner The current owner of the seed
     */
    function mintPrint(uint256 seed, address payable _owner)
        external
        payable
        onlyWhenMintPrintEnabled
        nonReentrant
        returns (uint256)
    {
        // Confirm id is a seedId and belongs to _owner
        require(isSeedId(seed) == true, "Invalid seed id");

        // Confirm seed belongs to _owner
        require(balanceOf(_owner, seed) == 1, "Incorrect seed owner");

        // Spam-prevention: restrict msg.sender to only external accounts for an initial mintPrint period
        if (msg.sender != tx.origin) {
            require(_contractMintPrintEnabled == true, "Contracts not allowed to mintPrint");
        }

        // Derive print tokenId from seed
        uint256 tokenId = getPrintTokenIdFromSeed(seed);

        // Increment supply to compute current print price
        uint256 newSupply = totalSupply[tokenId].add(1);

        // Confirm newSupply does not exceed max
        require(newSupply <= MAX_PRINT_SUPPLY, "Maximum supply exceeded");

        // Get price to mint the next print
        uint256 printPrice = getPrintPrice(newSupply);
        require(msg.value >= printPrice, "Insufficient funds");

        totalSupply[tokenId] = newSupply;

        // Reserve cut is amount that will go towards reserve for burn at new supply
        uint256 reserveCut = getBurnPrice(newSupply);

        // Update reserve balance
        reserve = reserve.add(reserveCut);

        // Extract % for seed owner from difference between mintPrint cost and amount held for reserve
        uint256 seedOwnerRoyalty = _getSeedOwnerCut(printPrice.sub(reserveCut));

        // Mint token
        _mint(msg.sender, tokenId, 1, "");

        // Disburse royalties
        if (seedOwnerRoyalty > 0) {
          _distributeRoyalty(seed, _owner, seedOwnerRoyalty);
        }

        // 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, _owner);
        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) external onlyWhenBurnPrintEnabled nonReentrant {
        // Confirm is valid seed id
        require(isSeedId(seed) == true, "Invalid seed id");

        // Derive token Id from seed
        uint256 tokenId = getPrintTokenIdFromSeed(seed);

        // Supply must meet user's minimum threshold
        uint256 oldSupply = totalSupply[tokenId];
        require(oldSupply >= minimumSupply, 'Min supply not met');

        // burnPrice is the amount of ETH returned for burning this print
        uint256 burnPrice = getBurnPrice(oldSupply);
        uint256 newSupply = totalSupply[tokenId].sub(1);
        totalSupply[tokenId] = newSupply;

        // Update reserve balances
        reserve = reserve.sub(burnPrice);

        _burn(msg.sender, tokenId, 1);

        // Disburse funds
        msg.sender.sendValue(burnPrice);

        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) {
        uint256 decimals = 10 ** SIG_DIGITS;

        // For prints 0-100, exponent value is < 0.001
        if (printNumber <= 100) {
            price = 0;
        } else if (printNumber < B) {
            // 10/A ^ (B - X)
            price = (10 ** ( B.sub(printNumber) )).mul(decimals).div(A ** ( B.sub(printNumber)));
        } else if (printNumber == B) {
            // A/10 ^ 0 == 1
            price = decimals;     // price = decimals * (A ^ 0)
        } else {
            // A/10 ^ (X - B)
            price = (A ** ( printNumber.sub(B) )).mul(decimals).div(10 ** ( printNumber.sub(B) ));
        }
        // += C*X
        price = price.add(C.mul(printNumber));

        // Convert to wei
        price = price.mul(1 ether).div(decimals);
    }

    /**
     * @dev Function to return amount of 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);
        // 84 % of print price
        price = printPrice.mul(84).div(100);
    }

    /**
     * @dev Function to get prices by supply
     * @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 getPricesBySupply(uint256 supply) public pure returns (uint256 printPrice, uint256 nextPrintPrice, uint256 burnPrice, uint256 nextBurnPrice) {
        printPrice = getPrintPrice(supply);
        nextPrintPrice = getPrintPrice(supply + 1);
        burnPrice = getBurnPrice(supply);
        nextBurnPrice = getBurnPrice(supply + 1);
    }

    /**
     * @dev Function to get prices & supply by seed
     * @param seed The original NFT token id
     */
    function getPricesBySeed(uint256 seed) external view returns (uint256 printPrice, uint256 nextPrintPrice, uint256 burnPrice, uint256 nextBurnPrice, uint256 supply) {
        supply = seedToPrintsSupply(seed);
        (printPrice, nextPrintPrice, burnPrice, nextBurnPrice) = getPricesBySupply(supply);
    }


    /***********************************|
    | Public Getters - Seed + Prints    |
    |__________________________________*/

    /**
     * @dev Get the number of prints minted for the corresponding seed
     * @param seed The 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 original NFT id
     * @param seed The original NFT token id
     */
    function getPrintTokenIdFromSeed(uint256 seed) public pure returns (uint256) {
        return seed | PRINTS_FLAG_BIT;
    }

    /**
     * @dev Return whether a tokenId is for an original
     * @param tokenId The original NFT token id
     */
    function isSeedId(uint256 tokenId) public pure returns (bool) {
        return tokenId & PRINTS_FLAG_BIT != PRINTS_FLAG_BIT;
    }


    /***********************************|
    |   Public Getters - Metadata       |
    |__________________________________*/

    /**
     * @dev Return the script section for a particular index
     * @param index The index of a script section
     */
    function getScriptAtIndex(uint256 index) external 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) external override view returns (string memory) {
        require(totalSupply[_id] > 0, "URI query for nonexistent token");
        return string(abi.encodePacked(_baseURI, _id.toString(), ".json"));
    }


    /***********************************|
    |Internal Functions - Generate Seed |
    |__________________________________*/

    /**
     * @dev Returns a new seed
     * @param uniqueValue Random input for the seed generation
     */
    function _generateSeed(uint256 uniqueValue) internal view returns (uint256) {
        bytes32 hash = keccak256(abi.encodePacked(block.number, blockhash(block.number.sub(1)), msg.sender, uniqueValue));

        // gridLength 0-5
        uint8 gridLength = uint8(hash[0]) % 15;
        if (gridLength > 5) gridLength = 1;

        // 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 = uint8(hash[4]) % 4;

        return uint256(gridLength) << 40 | uint256(horizontalLever) << 32 | uint256(diagonalLever) << 24 | uint256(palette) << 16 | uint256(innerShape) << 8;
    }


    /***********************************|
    |  Internal Functions - Prints      |
    |__________________________________*/

    /**
     * @dev Returns the part of the mintPrint fee reserved for the seed owner royalty
     * @param fee Amount of ETH not added to the contract reserve
     */
    function _getSeedOwnerCut(uint256 fee) internal pure returns (uint256) {
        // Seed owner and Treum split royalties 50/50
        return fee.div(2);
    }

    /**
     * @dev For mintPrint only, send remaining msg.value back to sender
     * @param printPrice Cost to mint current print
     */
    function _refundSender(uint256 printPrice) internal {
        if (msg.value.sub(printPrice) > 0) {
            msg.sender.sendValue(msg.value.sub(printPrice));
        }
    }


    /***********************************|
    |        Admin                      |
    |__________________________________*/

    /**
     * @dev Add a new section of the script
     * @param _script String value of script or pointer
     */
    function addScript(string memory _script) external onlyOwner onlyUnlocked {
        scripts[scriptCount] = _script;
        scriptCount = scriptCount.add(1);
    }

    /**
     * @dev Overwrite a script section at a particular index
     * @param _script String value of script or pointer
     * @param index Index of the script to replace
     */
    function updateScript(string memory _script, uint256 index) external onlyOwner onlyUnlocked {
        require(index < scriptCount, "Index out of bounds");
        scripts[index] = _script;
    }

    /**
     * @dev Reset script index to zero, caller must be owner and the contract unlocked
     */
    function resetScriptCount() external onlyOwner onlyUnlocked {
        scriptCount = 0;
    }

    /**
     * @dev Withdraw earned funds from original Nft sales and print fees. Cannot withdraw the reserve funds.
     */
    function withdraw() external onlyOwner nonReentrant {
        uint256 withdrawableFunds = address(this).balance.sub(reserve);
        msg.sender.sendValue(withdrawableFunds);
    }

    /**
     * @dev Function to enable/disable original minting
     * @param enabled The flag to turn minting on or off
     */
    function setMintEnabled(bool enabled) external onlyOwner {
        mintEnabled = enabled;
    }

    /**
     * @dev Function to enable/disable print minting
     * @param enabled The flag to turn minting on or off
     */
    function setMintPrintEnabled(bool enabled) external onlyOwner {
        mintPrintEnabled = enabled;
    }

    /**
     * @dev Function to enable/disable print burning
     * @param enabled The flag to turn minting on or off
     */
    function setBurnPrintEnabled(bool enabled) external onlyOwner {
        burnPrintEnabled = enabled;
    }

    /**
     * @dev Function to enable/disable print minting via contract
     * @param enabled The flag to turn contract print minting on or off
     */
    function setContractMintPrintEnabled(bool enabled) external onlyOwner {
        _contractMintPrintEnabled = enabled;
    }

    /**
     * @dev Function to lock/unlock the on-chain metadata
     * @param locked The flag turn locked on
     */
    function setLocked(bool locked) external 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) external onlyOwner {
        _baseURI = newuri;
    }
}

File 2 of 16 : Ownable.sol
// 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;
    }
}

File 3 of 16 : ERC1155.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "./IERC1155.sol";
import "./IERC1155MetadataURI.sol";
import "./IERC1155Receiver.sol";
import "../../utils/Context.sol";
import "../../introspection/ERC165.sol";
import "../../math/SafeMath.sol";
import "../../utils/Address.sol";

/**
 *
 * @dev Implementation of the basic standard multi-token.
 * See https://eips.ethereum.org/EIPS/eip-1155
 * Originally based on code by Enjin: https://github.com/enjin/erc-1155
 *
 * _Available since v3.1._
 */
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;

    // Used as the URI for all token types by relying on ID substitution, e.g. https://token-cdn-domain/{id}.json
    string private _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 uri_) public {
        _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 virtual 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
        virtual
        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) {
            batchBalances[i] = balanceOf(accounts[i], ids[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 virtual 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 `account` 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;
    }
}

File 4 of 16 : ReentrancyGuard.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev Contract module that helps prevent reentrant calls to a function.
 *
 * Inheriting from `ReentrancyGuard` will make the {nonReentrant} modifier
 * available, which can be applied to functions to make sure there are no nested
 * (reentrant) calls to them.
 *
 * Note that because there is a single `nonReentrant` guard, functions marked as
 * `nonReentrant` may not call one another. This can be worked around by making
 * those functions `private`, and then adding `external` `nonReentrant` entry
 * points to them.
 *
 * TIP: If you would like to learn more about reentrancy and alternative ways
 * to protect against it, check out our blog post
 * https://blog.openzeppelin.com/reentrancy-after-istanbul/[Reentrancy After Istanbul].
 */
abstract contract ReentrancyGuard {
    // Booleans are more expensive than uint256 or any type that takes up a full
    // word because each write operation emits an extra SLOAD to first read the
    // slot's contents, replace the bits taken up by the boolean, and then write
    // back. This is the compiler's defense against contract upgrades and
    // pointer aliasing, and it cannot be disabled.

    // The values being non-zero value makes deployment a bit more expensive,
    // but in exchange the refund on every call to nonReentrant will be lower in
    // amount. Since refunds are capped to a percentage of the total
    // transaction's gas, it is best to keep them low in cases like this one, to
    // increase the likelihood of the full refund coming into effect.
    uint256 private constant _NOT_ENTERED = 1;
    uint256 private constant _ENTERED = 2;

    uint256 private _status;

    constructor () internal {
        _status = _NOT_ENTERED;
    }

    /**
     * @dev Prevents a contract from calling itself, directly or indirectly.
     * Calling a `nonReentrant` function from another `nonReentrant`
     * function is not supported. It is possible to prevent this from happening
     * by making the `nonReentrant` function external, and make it call a
     * `private` function that does the actual work.
     */
    modifier nonReentrant() {
        // On the first call to nonReentrant, _notEntered will be true
        require(_status != _ENTERED, "ReentrancyGuard: reentrant call");

        // Any calls to nonReentrant after this point will fail
        _status = _ENTERED;

        _;

        // By storing the original value once again, a refund is triggered (see
        // https://eips.ethereum.org/EIPS/eip-2200)
        _status = _NOT_ENTERED;
    }
}

File 5 of 16 : Address.sol
// 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);
            }
        }
    }
}

File 6 of 16 : Strings.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

/**
 * @dev String operations.
 */
library Strings {
    /**
     * @dev Converts a `uint256` to its ASCII `string` representation.
     */
    function toString(uint256 value) internal pure returns (string memory) {
        // Inspired by OraclizeAPI's implementation - MIT licence
        // https://github.com/oraclize/ethereum-api/blob/b42146b063c7d6ee1358846c198246239e9360e8/oraclizeAPI_0.4.25.sol

        if (value == 0) {
            return "0";
        }
        uint256 temp = value;
        uint256 digits;
        while (temp != 0) {
            digits++;
            temp /= 10;
        }
        bytes memory buffer = new bytes(digits);
        uint256 index = digits - 1;
        temp = value;
        while (temp != 0) {
            buffer[index--] = bytes1(uint8(48 + temp % 10));
            temp /= 10;
        }
        return string(buffer);
    }
}

File 7 of 16 : RoyaltyDistributor.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;

import "@openzeppelin/contracts/utils/Address.sol";
import "@openzeppelin/contracts/introspection/ERC165Checker.sol";

import "./IEulerBeatsRoyaltyReceiver.sol";


contract RoyaltyDistributor {

    using Address for address payable;

    function _distributeRoyalty(
        uint256 tokenId,
        address payable tokenOwner,
        uint256 royalty
    ) internal {
        require(royalty > 0, "Missing royalty");

        // this logic is broken into three cases:
        // case 1: tokenOwner is a contract that implements RoyaltyReciever
        // case 2: tokenOwner is a contract but not a RoyaltyReceiver
        // case 3: tokenOwner is not a contract

        if (tokenOwner.isContract()) {
            if (ERC165Checker.supportsInterface(tokenOwner, IEulerBeatsRoyaltyReceiver(tokenOwner).royaltyReceived.selector)) {
                // case 1
                require(address(this).balance >= royalty, "RoyaltyDistributor: insufficient balance");
                try IEulerBeatsRoyaltyReceiver(tokenOwner).royaltyReceived{value: royalty}(address(this), tokenId, tokenOwner) returns (bytes4 response) {
                    if (response != IEulerBeatsRoyaltyReceiver(tokenOwner).royaltyReceived.selector) {
                        revert("IEulerBeatsRoyaltyReceiver rejected royalty");
                    }
                } catch Error(string memory reason) {
                    revert(reason);
                } catch {
                    revert("RoyaltyDistributor: royaltyReceived reverted");
                }
            } else {
                // case 2
                tokenOwner.sendValue(royalty);
            }
        } else {
            // case 3
            tokenOwner.sendValue(royalty);
        }

    }

}

File 8 of 16 : Context.sol
// 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;
    }
}

File 9 of 16 : IERC1155.sol
// 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;
}

File 10 of 16 : IERC1155MetadataURI.sol
// 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);
}

File 11 of 16 : IERC1155Receiver.sol
// 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);
}

File 12 of 16 : ERC165.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;
    }
}

File 13 of 16 : SafeMath.sol
// 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;
    }
}

File 14 of 16 : IERC165.sol
// 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);
}

File 15 of 16 : ERC165Checker.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.2 <0.8.0;

/**
 * @dev Library used to query support of an interface declared via {IERC165}.
 *
 * Note that these functions return the actual result of the query: they do not
 * `revert` if an interface is not supported. It is up to the caller to decide
 * what to do in these cases.
 */
library ERC165Checker {
    // As per the EIP-165 spec, no interface should ever match 0xffffffff
    bytes4 private constant _INTERFACE_ID_INVALID = 0xffffffff;

    /*
     * bytes4(keccak256('supportsInterface(bytes4)')) == 0x01ffc9a7
     */
    bytes4 private constant _INTERFACE_ID_ERC165 = 0x01ffc9a7;

    /**
     * @dev Returns true if `account` supports the {IERC165} interface,
     */
    function supportsERC165(address account) internal view returns (bool) {
        // Any contract that implements ERC165 must explicitly indicate support of
        // InterfaceId_ERC165 and explicitly indicate non-support of InterfaceId_Invalid
        return _supportsERC165Interface(account, _INTERFACE_ID_ERC165) &&
            !_supportsERC165Interface(account, _INTERFACE_ID_INVALID);
    }

    /**
     * @dev Returns true if `account` supports the interface defined by
     * `interfaceId`. Support for {IERC165} itself is queried automatically.
     *
     * See {IERC165-supportsInterface}.
     */
    function supportsInterface(address account, bytes4 interfaceId) internal view returns (bool) {
        // query support of both ERC165 as per the spec and support of _interfaceId
        return supportsERC165(account) &&
            _supportsERC165Interface(account, interfaceId);
    }

    /**
     * @dev Returns a boolean array where each value corresponds to the
     * interfaces passed in and whether they're supported or not. This allows
     * you to batch check interfaces for a contract where your expectation
     * is that some interfaces may not be supported.
     *
     * See {IERC165-supportsInterface}.
     *
     * _Available since v3.4._
     */
    function getSupportedInterfaces(address account, bytes4[] memory interfaceIds) internal view returns (bool[] memory) {
        // an array of booleans corresponding to interfaceIds and whether they're supported or not
        bool[] memory interfaceIdsSupported = new bool[](interfaceIds.length);

        // query support of ERC165 itself
        if (supportsERC165(account)) {
            // query support of each interface in interfaceIds
            for (uint256 i = 0; i < interfaceIds.length; i++) {
                interfaceIdsSupported[i] = _supportsERC165Interface(account, interfaceIds[i]);
            }
        }

        return interfaceIdsSupported;
    }

    /**
     * @dev Returns true if `account` supports all the interfaces defined in
     * `interfaceIds`. Support for {IERC165} itself is queried automatically.
     *
     * Batch-querying can lead to gas savings by skipping repeated checks for
     * {IERC165} support.
     *
     * See {IERC165-supportsInterface}.
     */
    function supportsAllInterfaces(address account, bytes4[] memory interfaceIds) internal view returns (bool) {
        // query support of ERC165 itself
        if (!supportsERC165(account)) {
            return false;
        }

        // query support of each interface in _interfaceIds
        for (uint256 i = 0; i < interfaceIds.length; i++) {
            if (!_supportsERC165Interface(account, interfaceIds[i])) {
                return false;
            }
        }

        // all interfaces supported
        return true;
    }

    /**
     * @notice Query if a contract implements an interface, does not check ERC165 support
     * @param account The address of the contract to query for support of an interface
     * @param interfaceId The interface identifier, as specified in ERC-165
     * @return true if the contract at account indicates support of the interface with
     * identifier interfaceId, false otherwise
     * @dev Assumes that account contains a contract that supports ERC165, otherwise
     * the behavior of this method is undefined. This precondition can be checked
     * with {supportsERC165}.
     * Interface identification is specified in ERC-165.
     */
    function _supportsERC165Interface(address account, bytes4 interfaceId) private view returns (bool) {
        // success determines whether the staticcall succeeded and result determines
        // whether the contract at account indicates support of _interfaceId
        (bool success, bool result) = _callERC165SupportsInterface(account, interfaceId);

        return (success && result);
    }

    /**
     * @notice Calls the function with selector 0x01ffc9a7 (ERC165) and suppresses throw
     * @param account The address of the contract to query for support of an interface
     * @param interfaceId The interface identifier, as specified in ERC-165
     * @return success true if the STATICCALL succeeded, false otherwise
     * @return result true if the STATICCALL succeeded and the contract at account
     * indicates support of the interface with identifier interfaceId, false otherwise
     */
    function _callERC165SupportsInterface(address account, bytes4 interfaceId)
        private
        view
        returns (bool, bool)
    {
        bytes memory encodedParams = abi.encodeWithSelector(_INTERFACE_ID_ERC165, interfaceId);
        (bool success, bytes memory result) = account.staticcall{ gas: 30000 }(encodedParams);
        if (result.length < 32) return (false, false);
        return (success, abi.decode(result, (bool)));
    }
}

File 16 of 16 : IEulerBeatsRoyaltyReceiver.sol
// SPDX-License-Identifier: MIT

pragma solidity >=0.6.0 <0.8.0;


import "@openzeppelin/contracts/introspection/ERC165.sol";


interface IEulerBeatsRoyaltyReceiver is IERC165 {

    /**
        @dev Handles the receipt of a royalty payout for the given original EulerBeat.
        The royalty amount is the ether in msg.value.
        To accept the royalty, this must return
        `bytes4(keccak256("royaltyReceived(address,uint256,address)"))`
        Implementors should take care to do the bare minimum in this function as it is
        called as part of the mintPrint function, and will raise the gas required for minting prints.
        @param tokenAddress The token address of the EulerBeats contract that the royalty was paid from
        @param tokenId The ID of token the royalty was paid for.  This is always the original token id, not print token ids
        @param tokenOwner The current owner of the specified token
        @return `bytes4(keccak256("royaltyReceived(address,uint256,address)"))` if royalty accepted
    */
    function royaltyReceived(
        address tokenAddress,
        uint256 tokenId,
        address tokenOwner
    )
        external payable
        returns(bytes4);

}

Settings
{
  "optimizer": {
    "enabled": true,
    "runs": 200
  },
  "outputSelection": {
    "*": {
      "*": [
        "evm.bytecode",
        "evm.deployedBytecode",
        "abi"
      ]
    }
  },
  "libraries": {}
}

Contract Security Audit

Contract ABI

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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)

000000000000000000000000000000000000000000000000000000000000006000000000000000000000000000000000000000000000000000000000000000a000000000000000000000000000000000000000000000000000000000000000e0000000000000000000000000000000000000000000000000000000000000001245756c657242656174733a20456e69676d61000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000066542454154530000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000868747470733a2f2f000000000000000000000000000000000000000000000000

-----Decoded View---------------
Arg [0] : _name (string): EulerBeats: Enigma
Arg [1] : _symbol (string): eBEATS
Arg [2] : _uri (string): https://

-----Encoded View---------------
9 Constructor Arguments found :
Arg [0] : 0000000000000000000000000000000000000000000000000000000000000060
Arg [1] : 00000000000000000000000000000000000000000000000000000000000000a0
Arg [2] : 00000000000000000000000000000000000000000000000000000000000000e0
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000012
Arg [4] : 45756c657242656174733a20456e69676d610000000000000000000000000000
Arg [5] : 0000000000000000000000000000000000000000000000000000000000000006
Arg [6] : 6542454154530000000000000000000000000000000000000000000000000000
Arg [7] : 0000000000000000000000000000000000000000000000000000000000000008
Arg [8] : 68747470733a2f2f000000000000000000000000000000000000000000000000


Block Transaction Difficulty Gas Used Reward
Block Uncle Number Difficulty Gas Used Reward
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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.