├── .gitattributes
├── .gitignore
├── app
    ├── public
    │   ├── robots.txt
    │   ├── favicon.ico
    │   └── index.html
    ├── src
    │   ├── logo.png
    │   ├── App.test.js
    │   ├── index.css
    │   ├── drizzleOptions.js
    │   ├── index.js
    │   ├── App.js
    │   ├── App.css
    │   ├── MyComponent.js
    │   ├── serviceWorker.js
    │   ├── CryptoMuseum.js
    │   └── contracts
    │   │   ├── IERC165.json
    │   │   ├── IERC721Receiver.json
    │   │   ├── Context.json
    │   │   ├── Migrations.json
    │   │   ├── IERC721Metadata.json
    │   │   └── IERC721Enumerable.json
    ├── .gitignore
    ├── package.json
    └── README.md
├── migrations
    ├── 1_initial_migration.js
    └── 2_deploy_contracts.js
├── contracts
    ├── Migrations.sol
    └── CryptoMuseum.sol
├── test
    ├── TestSimpleStorage.sol
    └── simplestorage.js
├── package.json
└── truffle-config.js


/.gitattributes:
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1 | *.sol linguist-language=Solidity
2 | 


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/.gitignore:
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1 | node_modules
2 | build
3 | .DS_Store
4 | 


--------------------------------------------------------------------------------
/app/public/robots.txt:
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1 | # https://www.robotstxt.org/robotstxt.html
2 | User-agent: *
3 | 


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/app/src/logo.png:
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https://raw.githubusercontent.com/SamueleA/crypto-museum-demo/HEAD/app/src/logo.png


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/app/public/favicon.ico:
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https://raw.githubusercontent.com/SamueleA/crypto-museum-demo/HEAD/app/public/favicon.ico


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/migrations/1_initial_migration.js:
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1 | var Migrations = artifacts.require("Migrations");
2 | 
3 | module.exports = function(deployer) {
4 |   deployer.deploy(Migrations);
5 | };
6 | 


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/migrations/2_deploy_contracts.js:
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1 | const CryptoMuseum = artifacts.require("CryptoMuseum");
2 | 
3 | module.exports = function(deployer) {
4 |   deployer.deploy(CryptoMuseum);
5 | };
6 | 


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/app/src/App.test.js:
--------------------------------------------------------------------------------
 1 | import React from 'react';
 2 | import ReactDOM from 'react-dom';
 3 | import App from './App';
 4 | 
 5 | it('renders without crashing', () => {
 6 |   const div = document.createElement('div');
 7 |   ReactDOM.render(<App />, div);
 8 |   ReactDOM.unmountComponentAtNode(div);
 9 | });
10 | 


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/app/.gitignore:
--------------------------------------------------------------------------------
 1 | # See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
 2 | 
 3 | # dependencies
 4 | /node_modules
 5 | /.pnp
 6 | .pnp.js
 7 | 
 8 | # testing
 9 | /coverage
10 | 
11 | # production
12 | /build
13 | 
14 | # misc
15 | .DS_Store
16 | .env.local
17 | .env.development.local
18 | .env.test.local
19 | .env.production.local
20 | 
21 | npm-debug.log*
22 | yarn-debug.log*
23 | yarn-error.log*
24 | 


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/contracts/Migrations.sol:
--------------------------------------------------------------------------------
 1 | pragma solidity >=0.4.21 <0.7.0;
 2 | 
 3 | contract Migrations {
 4 |     address public owner;
 5 |     uint public last_completed_migration;
 6 | 
 7 |     constructor() public {
 8 |         owner = msg.sender;
 9 |     }
10 | 
11 |     modifier restricted() {
12 |         if (msg.sender == owner) _;
13 |     }
14 | 
15 |     function setCompleted(uint completed) public restricted {
16 |         last_completed_migration = completed;
17 |     }
18 | }
19 | 


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/app/src/index.css:
--------------------------------------------------------------------------------
 1 | body {
 2 |   margin: 0;
 3 |   font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen",
 4 |     "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue",
 5 |     sans-serif;
 6 |   -webkit-font-smoothing: antialiased;
 7 |   -moz-osx-font-smoothing: grayscale;
 8 |   background-color: #5170CF !important;
 9 | }
10 | 
11 | code {
12 |   font-family: source-code-pro, Menlo, Monaco, Consolas, "Courier New",
13 |     monospace;
14 | }
15 | 


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/app/src/drizzleOptions.js:
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 1 | import Web3 from "web3";
 2 | import CryptoMuseum from "./contracts/CryptoMuseum.json";
 3 | 
 4 | const options = {
 5 |   web3: {
 6 |     block: false,
 7 |     // customProvider: new Web3("ws://localhost:7545"),
 8 |     // fallback: {
 9 |     //   type: 'ws',
10 |     //   url: 'ws://127.0.0.1:7545'
11 |     // },
12 |   },
13 |   contracts: [CryptoMuseum],
14 |   events: {
15 |     SimpleStorage: ["StorageSet"],
16 |   },
17 | };
18 | 
19 | export default options;
20 | 


--------------------------------------------------------------------------------
/test/TestSimpleStorage.sol:
--------------------------------------------------------------------------------
 1 | pragma solidity >=0.4.21 <0.7.0;
 2 | 
 3 | import "truffle/Assert.sol";
 4 | import "truffle/DeployedAddresses.sol";
 5 | import "../contracts/SimpleStorage.sol";
 6 | 
 7 | contract TestSimpleStorage {
 8 |     function testItStoresAValue() public {
 9 |         SimpleStorage simpleStorage = SimpleStorage(DeployedAddresses.SimpleStorage());
10 | 
11 |         simpleStorage.set(89);
12 | 
13 |         uint expected = 89;
14 | 
15 |         Assert.equal(simpleStorage.storedData(), expected, "It should store the value 89.");
16 |     }
17 | }


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/test/simplestorage.js:
--------------------------------------------------------------------------------
 1 | const SimpleStorage = artifacts.require("SimpleStorage");
 2 | 
 3 | contract("SimpleStorage", accounts => {
 4 |   it("...should store the value 89.", async () => {
 5 |     const simpleStorageInstance = await SimpleStorage.deployed();
 6 | 
 7 |     // Set value of 89
 8 |     await simpleStorageInstance.set(89, { from: accounts[0] });
 9 | 
10 |     // Get stored value
11 |     const storedData = await simpleStorageInstance.storedData.call();
12 | 
13 |     assert.equal(storedData, 89, "The value 89 was not stored.");
14 |   });
15 | });
16 | 


--------------------------------------------------------------------------------
/app/src/index.js:
--------------------------------------------------------------------------------
 1 | import React from 'react';
 2 | import ReactDOM from 'react-dom';
 3 | import App from './App';
 4 | import './index.css';
 5 | import * as serviceWorker from './serviceWorker';
 6 | import 'bootstrap/dist/css/bootstrap.min.css';
 7 | 
 8 | ReactDOM.render(<App />, document.getElementById('root'));
 9 | 
10 | // If you want your app to work offline and load faster, you can change
11 | // unregister() to register() below. Note this comes with some pitfalls.
12 | // Learn more about service workers: https://bit.ly/CRA-PWA
13 | serviceWorker.unregister();
14 | 


--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "drizzle-box",
 3 |   "version": "1.0.0",
 4 |   "description": "",
 5 |   "main": "truffle-config.js",
 6 |   "directories": {
 7 |     "test": "test"
 8 |   },
 9 |   "scripts": {
10 |     "test": "echo \"Error: no test specified\" && exit 1",
11 |     "verify": "truffle run verify CryptoMuseum --network ropsten"
12 |   },
13 |   "repository": {
14 |     "type": "git",
15 |     "url": "git+https://github.com/truffle-box/drizzle-box.git"
16 |   },
17 |   "keywords": [],
18 |   "author": "",
19 |   "license": "ISC",
20 |   "bugs": {
21 |     "url": "https://github.com/truffle-box/drizzle-box/issues"
22 |   },
23 |   "homepage": "https://github.com/truffle-box/drizzle-box#readme",
24 |   "dependencies": {
25 |     "@openzeppelin/contracts": "^3.0.1",
26 |     "truffle-hdwallet-provider": "^1.0.17"
27 |   },
28 |   "devDependencies": {
29 |     "truffle-plugin-verify": "^0.3.10"
30 |   }
31 | }
32 | 


--------------------------------------------------------------------------------
/contracts/CryptoMuseum.sol:
--------------------------------------------------------------------------------
 1 | pragma solidity >=0.5.0;
 2 | 
 3 | import "@openzeppelin/contracts/token/ERC721/ERC721.sol";
 4 | 
 5 | contract CryptoMuseum is ERC721 {
 6 |     constructor() ERC721("CryptoMuseum", "CM") public {
 7 |     }
 8 | 
 9 |     mapping(uint256 => string) private _CIDS;
10 | 
11 |     function CID(uint256 tokenId) public view returns (string memory) {
12 |       require(_exists(tokenId), "ERC721Metadata: CID query for nonexistent token");
13 | 
14 |       string memory _CID = _CIDS[tokenId];
15 | 
16 |       return _CID;
17 |     }
18 | 
19 |     function _setTokenCID(uint256 tokenId, string memory _CID) internal virtual {
20 |       require(_exists(tokenId), "ERC721Metadata: CID set of nonexistent token");
21 |       _CIDS[tokenId] = _CID;
22 |     }
23 | 
24 | 
25 |     function mint(string memory _CID) public {
26 |       uint256 _newId = totalSupply() + 1;
27 |       _safeMint(msg.sender, _newId);
28 |       _setTokenCID(_newId, _CID);
29 |     }
30 | }


--------------------------------------------------------------------------------
/truffle-config.js:
--------------------------------------------------------------------------------
 1 | const path = require("path");
 2 | const HDWalletProvider = require("truffle-hdwallet-provider");
 3 | const mnemonic = process.env.MNEMONIC_ROPSTEN;
 4 | const infuraAccessKey = process.env.INFURA_ACCESS_KEY
 5 | 
 6 | module.exports = {
 7 |   contracts_build_directory: path.join(__dirname, "app/src/contracts"),
 8 |   networks: {
 9 |     develop: { // default with truffle unbox is 7545, but we can use develop to test changes, ex. truffle migrate --network develop
10 |       host: "127.0.0.1",
11 |       port: 7545,
12 |       network_id: "5777"
13 |     },
14 |     ropsten: {
15 |       network_id: "3",
16 |       provider: () => { 
17 |         return new HDWalletProvider(mnemonic, `https://ropsten.infura.io/v3/${infuraAccessKey}`);
18 |        },
19 |     }
20 |   },
21 |   compilers: {
22 |     solc: {
23 |       version: "0.6.2",
24 |     },
25 |   },
26 |   plugins: [
27 |     'truffle-plugin-verify'
28 |   ],
29 |   api_keys: {
30 |     etherscan: process.env.ETHERSCAN_API_KEY
31 |   }
32 | };
33 | 


--------------------------------------------------------------------------------
/app/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "app",
 3 |   "version": "0.1.0",
 4 |   "private": true,
 5 |   "dependencies": {
 6 |     "@drizzle/react-components": "^1.5.1",
 7 |     "@drizzle/react-plugin": "^1.5.1",
 8 |     "@drizzle/store": "^1.5.1",
 9 |     "aws-sdk": "^2.677.0",
10 |     "bootstrap": "^4.5.0",
11 |     "react": "^16.11.0",
12 |     "react-bootstrap": "^1.0.1",
13 |     "react-dom": "^16.11.0",
14 |     "react-images-upload": "^1.2.8",
15 |     "react-scripts": "3.2.0"
16 |   },
17 |   "scripts": {
18 |     "start": "react-scripts start",
19 |     "build": "react-scripts build",
20 |     "test": "react-scripts test",
21 |     "eject": "react-scripts eject"
22 |   },
23 |   "eslintConfig": {
24 |     "extends": "react-app"
25 |   },
26 |   "browserslist": {
27 |     "production": [
28 |       ">0.2%",
29 |       "not dead",
30 |       "not op_mini all"
31 |     ],
32 |     "development": [
33 |       "last 1 chrome version",
34 |       "last 1 firefox version",
35 |       "last 1 safari version"
36 |     ]
37 |   }
38 | }
39 | 


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/app/src/App.js:
--------------------------------------------------------------------------------
 1 | import React from "react";
 2 | import { Jumbotron } from 'react-bootstrap';
 3 | import { DrizzleContext } from "@drizzle/react-plugin";
 4 | import { Drizzle } from "@drizzle/store";
 5 | import drizzleOptions from "./drizzleOptions";
 6 | // import MyComponent from "./MyComponent";
 7 | import CryptoMuseum from './CryptoMuseum';
 8 | import "./App.css";
 9 | 
10 | const drizzle = new Drizzle(drizzleOptions);
11 | 
12 | const App = () => {
13 |   return (
14 |     <DrizzleContext.Provider drizzle={drizzle}>
15 |       <DrizzleContext.Consumer>
16 |         {drizzleContext => {
17 |           const { drizzle, drizzleState, initialized } = drizzleContext;
18 | 
19 |           if (!initialized || drizzleState.web3.status === 'failed') {
20 |             return (
21 |               <Jumbotron className="loading-jumbo">
22 |                 <div className="loading-text">
23 |                   <div>Connect Metamask to start the app</div>
24 |                   <div>This app works on the Ropsten Testnet</div>
25 |                 </div>
26 |               </Jumbotron>
27 |             )
28 |           }
29 | 
30 |           return (
31 |             <CryptoMuseum drizzle={drizzle} drizzleState={drizzleState} />
32 |           )
33 |         }}
34 |       </DrizzleContext.Consumer>
35 |     </DrizzleContext.Provider>
36 |   );
37 | }
38 | 
39 | export default App;
40 | 


--------------------------------------------------------------------------------
/app/src/App.css:
--------------------------------------------------------------------------------
 1 | .App {
 2 |   text-align: center;
 3 |   margin: 2rem;
 4 | }
 5 | 
 6 | .section {
 7 |   text-align: left;
 8 |   max-width: 720px;
 9 |   margin: 4rem auto auto;
10 | }
11 | 
12 | .collection-container {
13 |   display: flex;
14 |   flex-flow: row wrap;
15 | }
16 | 
17 | .token-container {
18 |   display: inline-block;
19 |   height: 344px;
20 |   margin: 20px;
21 |   padding: 10px;
22 |   background-color: #E9ECEF;
23 |   border-radius: 5px;
24 | }
25 | 
26 | .artwork-container {
27 |   display: flex;
28 |   justify-content: center;
29 |   align-items: center;
30 |   width: 300px;
31 |   height: 300px;
32 | }
33 | 
34 | .artwork {
35 |   max-height: 300px;
36 |   max-width: 300px;
37 | }
38 | 
39 | .button {
40 |   width: 120px;
41 | }
42 | 
43 | .uploader {
44 |   margin: 0 auto;
45 |   max-width: 500px;
46 | }
47 | 
48 | .steps {
49 |   margin: 20px 0;
50 | }
51 | .collection-title {
52 |   color: white;
53 | }
54 | 
55 | .title {
56 |   color: white;
57 |   margin-bottom: 20px;
58 |   font-weight: bold;
59 | }
60 | 
61 | .subtitle, .subtitle > a, .subtitle > a:hover {
62 |   color: white;
63 |   margin-bottom: 10px;
64 | }
65 | 
66 | .add-nft-title {
67 |   margin-top: 40px;
68 | }
69 | 
70 | .colleciton-subtitle {
71 |   color: #ffffff;
72 | }
73 | 
74 | .no-artwork {
75 |   margin-top: 20px;
76 | }
77 | 
78 | .loading-text {
79 |   font-size: 30px;
80 |   margin: 0 auto;
81 | }
82 | 
83 | .loading-jumbo {
84 |   width: 600px;
85 |   margin: 100px auto;
86 | }
87 | 
88 | .loading-image {
89 |   display: flex;
90 |   width: 300px;
91 |   height: 300px;
92 |   justify-content: center;
93 |   align-items: center;
94 | }


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/app/public/index.html:
--------------------------------------------------------------------------------
 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 |   <head>
 4 |     <meta charset="utf-8" />
 5 |     <link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
 6 |     <meta name="viewport" content="width=device-width, initial-scale=1" />
 7 |     <meta name="theme-color" content="#000000" />
 8 |     <meta
 9 |       name="description"
10 |       content="Web site created using create-react-app"
11 |     />
12 |     <link rel="apple-touch-icon" href="logo192.png" />
13 |     <!--
14 |       manifest.json provides metadata used when your web app is installed on a
15 |       user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
16 |     -->
17 |     <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
18 |     <!--
19 |       Notice the use of %PUBLIC_URL% in the tags above.
20 |       It will be replaced with the URL of the `public` folder during the build.
21 |       Only files inside the `public` folder can be referenced from the HTML.
22 | 
23 |       Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
24 |       work correctly both with client-side routing and a non-root public URL.
25 |       Learn how to configure a non-root public URL by running `npm run build`.
26 |     -->
27 |     <title>Crypto Museum</title>
28 |   </head>
29 |   <body>
30 |     <noscript>You need to enable JavaScript to run this app.</noscript>
31 |     <div id="root"></div>
32 |     <!--
33 |       This HTML file is a template.
34 |       If you open it directly in the browser, you will see an empty page.
35 | 
36 |       You can add webfonts, meta tags, or analytics to this file.
37 |       The build step will place the bundled scripts into the <body> tag.
38 | 
39 |       To begin the development, run `npm start` or `yarn start`.
40 |       To create a production bundle, use `npm run build` or `yarn build`.
41 |     -->
42 |   </body>
43 | </html>
44 | 


--------------------------------------------------------------------------------
/app/README.md:
--------------------------------------------------------------------------------
 1 | This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
 2 | 
 3 | ## Available Scripts
 4 | 
 5 | In the project directory, you can run:
 6 | 
 7 | ### `yarn start`
 8 | 
 9 | Runs the app in the development mode.<br />
10 | Open [http://localhost:3000](http://localhost:3000) to view it in the browser.
11 | 
12 | The page will reload if you make edits.<br />
13 | You will also see any lint errors in the console.
14 | 
15 | ### `yarn test`
16 | 
17 | Launches the test runner in the interactive watch mode.<br />
18 | See the section about [running tests](https://facebook.github.io/create-react-app/docs/running-tests) for more information.
19 | 
20 | ### `yarn build`
21 | 
22 | Builds the app for production to the `build` folder.<br />
23 | It correctly bundles React in production mode and optimizes the build for the best performance.
24 | 
25 | The build is minified and the filenames include the hashes.<br />
26 | Your app is ready to be deployed!
27 | 
28 | See the section about [deployment](https://facebook.github.io/create-react-app/docs/deployment) for more information.
29 | 
30 | ### `yarn eject`
31 | 
32 | **Note: this is a one-way operation. Once you `eject`, you can’t go back!**
33 | 
34 | If you aren’t satisfied with the build tool and configuration choices, you can `eject` at any time. This command will remove the single build dependency from your project.
35 | 
36 | Instead, it will copy all the configuration files and the transitive dependencies (Webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except `eject` will still work, but they will point to the copied scripts so you can tweak them. At this point you’re on your own.
37 | 
38 | You don’t have to ever use `eject`. The curated feature set is suitable for small and middle deployments, and you shouldn’t feel obligated to use this feature. However we understand that this tool wouldn’t be useful if you couldn’t customize it when you are ready for it.
39 | 
40 | ## Learn More
41 | 
42 | You can learn more in the [Create React App documentation](https://facebook.github.io/create-react-app/docs/getting-started).
43 | 
44 | To learn React, check out the [React documentation](https://reactjs.org/).
45 | 
46 | ### Code Splitting
47 | 
48 | This section has moved here: https://facebook.github.io/create-react-app/docs/code-splitting
49 | 
50 | ### Analyzing the Bundle Size
51 | 
52 | This section has moved here: https://facebook.github.io/create-react-app/docs/analyzing-the-bundle-size
53 | 
54 | ### Making a Progressive Web App
55 | 
56 | This section has moved here: https://facebook.github.io/create-react-app/docs/making-a-progressive-web-app
57 | 
58 | ### Advanced Configuration
59 | 
60 | This section has moved here: https://facebook.github.io/create-react-app/docs/advanced-configuration
61 | 
62 | ### Deployment
63 | 
64 | This section has moved here: https://facebook.github.io/create-react-app/docs/deployment
65 | 
66 | ### `yarn build` fails to minify
67 | 
68 | This section has moved here: https://facebook.github.io/create-react-app/docs/troubleshooting#npm-run-build-fails-to-minify
69 | 


--------------------------------------------------------------------------------
/app/src/MyComponent.js:
--------------------------------------------------------------------------------
  1 | import React from "react";
  2 | import { newContextComponents } from "@drizzle/react-components";
  3 | import logo from "./logo.png";
  4 | 
  5 | const { AccountData, ContractData, ContractForm } = newContextComponents;
  6 | 
  7 | export default ({ drizzle, drizzleState }) => {
  8 |   // destructure drizzle and drizzleState from props
  9 |   return (
 10 |     <div className="App">
 11 |       <div>
 12 |         <img src={logo} alt="drizzle-logo" />
 13 |         <h1>Drizzle Examples</h1>
 14 |         <p>
 15 |           Examples of how to get started with Drizzle in various situations.
 16 |         </p>
 17 |       </div>
 18 | 
 19 |       <div className="section">
 20 |         <h2>Active Account</h2>
 21 |         <AccountData
 22 |           drizzle={drizzle}
 23 |           drizzleState={drizzleState}
 24 |           accountIndex={0}
 25 |           units="ether"
 26 |           precision={3}
 27 |         />
 28 |       </div>
 29 | 
 30 |       <div className="section">
 31 |         <h2>SimpleStorage</h2>
 32 |         <p>
 33 |           This shows a simple ContractData component with no arguments, along
 34 |           with a form to set its value.
 35 |         </p>
 36 |         <p>
 37 |           <strong>Stored Value: </strong>
 38 |           <ContractData
 39 |             drizzle={drizzle}
 40 |             drizzleState={drizzleState}
 41 |             contract="SimpleStorage"
 42 |             method="storedData"
 43 |           />
 44 |         </p>
 45 |         <ContractForm drizzle={drizzle} contract="SimpleStorage" method="set" />
 46 |       </div>
 47 | 
 48 |       <div className="section">
 49 |         <h2>TutorialToken</h2>
 50 |         <p>
 51 |           Here we have a form with custom, friendly labels. Also note the token
 52 |           symbol will not display a loading indicator. We've suppressed it with
 53 |           the <code>hideIndicator</code> prop because we know this variable is
 54 |           constant.
 55 |         </p>
 56 |         <p>
 57 |           <strong>Total Supply: </strong>
 58 |           <ContractData
 59 |             drizzle={drizzle}
 60 |             drizzleState={drizzleState}
 61 |             contract="TutorialToken"
 62 |             method="totalSupply"
 63 |             methodArgs={[{ from: drizzleState.accounts[0] }]}
 64 |           />{" "}
 65 |           <ContractData
 66 |             drizzle={drizzle}
 67 |             drizzleState={drizzleState}
 68 |             contract="TutorialToken"
 69 |             method="symbol"
 70 |             hideIndicator
 71 |           />
 72 |         </p>
 73 |         <p>
 74 |           <strong>My Balance: </strong>
 75 |           <ContractData
 76 |             drizzle={drizzle}
 77 |             drizzleState={drizzleState}
 78 |             contract="TutorialToken"
 79 |             method="balanceOf"
 80 |             methodArgs={[drizzleState.accounts[0]]}
 81 |           />
 82 |         </p>
 83 |         <h3>Send Tokens</h3>
 84 |         <ContractForm
 85 |           drizzle={drizzle}
 86 |           contract="TutorialToken"
 87 |           method="transfer"
 88 |           labels={["To Address", "Amount to Send"]}
 89 |         />
 90 |       </div>
 91 | 
 92 |       <div className="section">
 93 |         <h2>ComplexStorage</h2>
 94 |         <p>
 95 |           Finally this contract shows data types with additional considerations.
 96 |           Note in the code the strings below are converted from bytes to UTF-8
 97 |           strings and the device data struct is iterated as a list.
 98 |         </p>
 99 |         <p>
100 |           <strong>String 1: </strong>
101 |           <ContractData
102 |             drizzle={drizzle}
103 |             drizzleState={drizzleState}
104 |             contract="ComplexStorage"
105 |             method="string1"
106 |             toUtf8
107 |           />
108 |         </p>
109 |         <p>
110 |           <strong>String 2: </strong>
111 |           <ContractData
112 |             drizzle={drizzle}
113 |             drizzleState={drizzleState}
114 |             contract="ComplexStorage"
115 |             method="string2"
116 |             toUtf8
117 |           />
118 |         </p>
119 |         <strong>Single Device Data: </strong>
120 |         <ContractData
121 |           drizzle={drizzle}
122 |           drizzleState={drizzleState}
123 |           contract="ComplexStorage"
124 |           method="singleDD"
125 |         />
126 |       </div>
127 |     </div>
128 |   );
129 | };
130 | 


--------------------------------------------------------------------------------
/app/src/serviceWorker.js:
--------------------------------------------------------------------------------
  1 | // This optional code is used to register a service worker.
  2 | // register() is not called by default.
  3 | 
  4 | // This lets the app load faster on subsequent visits in production, and gives
  5 | // it offline capabilities. However, it also means that developers (and users)
  6 | // will only see deployed updates on subsequent visits to a page, after all the
  7 | // existing tabs open on the page have been closed, since previously cached
  8 | // resources are updated in the background.
  9 | 
 10 | // To learn more about the benefits of this model and instructions on how to
 11 | // opt-in, read https://bit.ly/CRA-PWA
 12 | 
 13 | const isLocalhost = Boolean(
 14 |   window.location.hostname === 'localhost' ||
 15 |     // [::1] is the IPv6 localhost address.
 16 |     window.location.hostname === '[::1]' ||
 17 |     // 127.0.0.1/8 is considered localhost for IPv4.
 18 |     window.location.hostname.match(
 19 |       /^127(?:\.(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}$/
 20 |     )
 21 | );
 22 | 
 23 | export function register(config) {
 24 |   if (process.env.NODE_ENV === 'production' && 'serviceWorker' in navigator) {
 25 |     // The URL constructor is available in all browsers that support SW.
 26 |     const publicUrl = new URL(process.env.PUBLIC_URL, window.location.href);
 27 |     if (publicUrl.origin !== window.location.origin) {
 28 |       // Our service worker won't work if PUBLIC_URL is on a different origin
 29 |       // from what our page is served on. This might happen if a CDN is used to
 30 |       // serve assets; see https://github.com/facebook/create-react-app/issues/2374
 31 |       return;
 32 |     }
 33 | 
 34 |     window.addEventListener('load', () => {
 35 |       const swUrl = `${process.env.PUBLIC_URL}/service-worker.js`;
 36 | 
 37 |       if (isLocalhost) {
 38 |         // This is running on localhost. Let's check if a service worker still exists or not.
 39 |         checkValidServiceWorker(swUrl, config);
 40 | 
 41 |         // Add some additional logging to localhost, pointing developers to the
 42 |         // service worker/PWA documentation.
 43 |         navigator.serviceWorker.ready.then(() => {
 44 |           console.log(
 45 |             'This web app is being served cache-first by a service ' +
 46 |               'worker. To learn more, visit https://bit.ly/CRA-PWA'
 47 |           );
 48 |         });
 49 |       } else {
 50 |         // Is not localhost. Just register service worker
 51 |         registerValidSW(swUrl, config);
 52 |       }
 53 |     });
 54 |   }
 55 | }
 56 | 
 57 | function registerValidSW(swUrl, config) {
 58 |   navigator.serviceWorker
 59 |     .register(swUrl)
 60 |     .then(registration => {
 61 |       registration.onupdatefound = () => {
 62 |         const installingWorker = registration.installing;
 63 |         if (installingWorker == null) {
 64 |           return;
 65 |         }
 66 |         installingWorker.onstatechange = () => {
 67 |           if (installingWorker.state === 'installed') {
 68 |             if (navigator.serviceWorker.controller) {
 69 |               // At this point, the updated precached content has been fetched,
 70 |               // but the previous service worker will still serve the older
 71 |               // content until all client tabs are closed.
 72 |               console.log(
 73 |                 'New content is available and will be used when all ' +
 74 |                   'tabs for this page are closed. See https://bit.ly/CRA-PWA.'
 75 |               );
 76 | 
 77 |               // Execute callback
 78 |               if (config && config.onUpdate) {
 79 |                 config.onUpdate(registration);
 80 |               }
 81 |             } else {
 82 |               // At this point, everything has been precached.
 83 |               // It's the perfect time to display a
 84 |               // "Content is cached for offline use." message.
 85 |               console.log('Content is cached for offline use.');
 86 | 
 87 |               // Execute callback
 88 |               if (config && config.onSuccess) {
 89 |                 config.onSuccess(registration);
 90 |               }
 91 |             }
 92 |           }
 93 |         };
 94 |       };
 95 |     })
 96 |     .catch(error => {
 97 |       console.error('Error during service worker registration:', error);
 98 |     });
 99 | }
100 | 
101 | function checkValidServiceWorker(swUrl, config) {
102 |   // Check if the service worker can be found. If it can't reload the page.
103 |   fetch(swUrl)
104 |     .then(response => {
105 |       // Ensure service worker exists, and that we really are getting a JS file.
106 |       const contentType = response.headers.get('content-type');
107 |       if (
108 |         response.status === 404 ||
109 |         (contentType != null && contentType.indexOf('javascript') === -1)
110 |       ) {
111 |         // No service worker found. Probably a different app. Reload the page.
112 |         navigator.serviceWorker.ready.then(registration => {
113 |           registration.unregister().then(() => {
114 |             window.location.reload();
115 |           });
116 |         });
117 |       } else {
118 |         // Service worker found. Proceed as normal.
119 |         registerValidSW(swUrl, config);
120 |       }
121 |     })
122 |     .catch(() => {
123 |       console.log(
124 |         'No internet connection found. App is running in offline mode.'
125 |       );
126 |     });
127 | }
128 | 
129 | export function unregister() {
130 |   if ('serviceWorker' in navigator) {
131 |     navigator.serviceWorker.ready.then(registration => {
132 |       registration.unregister();
133 |     });
134 |   }
135 | }
136 | 


--------------------------------------------------------------------------------
/app/src/CryptoMuseum.js:
--------------------------------------------------------------------------------
  1 | import React, { useState, useRef } from "react";
  2 | import { Spinner, Button, Jumbotron } from 'react-bootstrap';
  3 | import fleekStorage from '@fleekhq/fleek-storage-js';
  4 | import { newContextComponents } from "@drizzle/react-components";
  5 | import ImageUploader from "react-images-upload";
  6 | 
  7 | const { ContractData } = newContextComponents;
  8 | 
  9 | export default ({ drizzle, drizzleState }) => {
 10 |   const imageUploaderRef = useRef(null);
 11 |   const [artwork, setArtwork] = useState(null);
 12 |   const [loading, setLoading] = useState(false);
 13 |   const [txQueue, setTxQueue] = useState([]);
 14 |   const onDrop = (picture) => {
 15 |     if (picture.length) {
 16 |       return setArtwork(picture[0])
 17 |     }
 18 |     setArtwork(null)
 19 |   };
 20 | 
 21 |   const clearPreview = () => {
 22 |     setArtwork(null);
 23 |     imageUploaderRef.current.clearPictures();
 24 |   };
 25 | 
 26 |   const createNFTTransaction = async (hash) => {
 27 |     const tokenURI = `https://ipfs.io/ipfs/${hash}`;
 28 | 
 29 |     const removeFromQueue = () => {
 30 |       const newTxQueue = txQueue.filter((uri) => uri !== tokenURI);
 31 |       setTxQueue(newTxQueue);
 32 |     }
 33 | 
 34 |     try {
 35 |       setTxQueue([...txQueue, tokenURI]);
 36 |       await drizzle.contracts.CryptoMuseum.methods.mint(hash).send({from: drizzleState.accounts[0]})
 37 |       removeFromQueue(tokenURI);
 38 |     } catch(e) {
 39 |       console.error(e);
 40 |       removeFromQueue(tokenURI);
 41 |     }
 42 |   };
 43 | 
 44 |   const handleButtonClick = async (newTokenId) => {
 45 |     setLoading(true)
 46 |     try {
 47 |       const date = new Date();
 48 |       const timestamp = date.getTime();
 49 | 
 50 |       const { hash } = await fleekStorage.upload({
 51 |         apiKey: 'API_KEY',
 52 |         apiSecret: 'API_SECRET',
 53 |         key: `nft/${newTokenId}-${timestamp}`,
 54 |         data: artwork,
 55 |       });
 56 | 
 57 |       setLoading(false);
 58 |       clearPreview();
 59 |       createNFTTransaction(hash)
 60 |     } catch(e) {
 61 |       console.error(e);
 62 |       setLoading(false);
 63 |     }
 64 |   }
 65 | 
 66 |   const getTokenDisplay = (tokenId) => {
 67 |     return (
 68 |       <div className="token-container">
 69 |         <span>token ID: {tokenId}</span>
 70 |         <ContractData
 71 |           drizzle={drizzle}
 72 |           drizzleState={drizzleState}
 73 |           contract="CryptoMuseum"
 74 |           method="CID"
 75 |           methodArgs={[tokenId]}
 76 |           render={(cid) =>  (
 77 |             <div className="artwork-container">
 78 |               <img className="artwork" src={`https://ipfs.fleek.co/ipfs/${cid}`} />
 79 |             </div>
 80 |           )}
 81 |         />
 82 |       </div>
 83 |     )
 84 |   };
 85 | 
 86 |   return (
 87 |   <div className="App">
 88 |     <div className="title"><h1>The Crypto Museum</h1></div>
 89 |     <div className="subtitle">
 90 |       {"ERC-721 Address: "}
 91 |       <a
 92 |         href={`https://ropsten.etherscan.io/address/${drizzle.contractList[0].address}`}
 93 |         target="_blank"
 94 |         rel="noopener noreferrer"
 95 |       >
 96 |         {drizzle.contractList[0].address}
 97 |         </a>
 98 |     </div>
 99 |     <Jumbotron>
100 |       <div>The Crypto Museum is a Dapp meant to demo the capabilities of <a href="https://docs.fleek.co/Storage/CLI_SDK">Fleek's Storage SDK</a>, which facilitates the permanent storage of files to IPFS.</div>
101 |       <div>The Museum itself is an ERC-721 contract that allows users to upload a piece of artwork and mint a new ERC-721 token.</div>
102 |       <div>An art gallery allows users to view their token collection.</div>
103 |       <div>NOTE: This app runs on the Ropsten Testnet</div>
104 |       <div className="add-nft-title">
105 |         <h2>Add a new NFT to your collection!</h2>
106 |       </div>
107 |       <div className="steps">
108 |         <span>1. Upload artwork</span>
109 |       </div>
110 |       <div className="uploader">
111 |         <ImageUploader
112 |           withIcon={true}
113 |           buttonText="Choose image"
114 |           onChange={onDrop}
115 |           imgExtension={[".jpg", ".gif", ".png", ".gif"]}
116 |           maxFileSize={5242880}
117 |           withPreview
118 |           singleImage
119 |           ref={iu => imageUploaderRef.current = iu}
120 |         />
121 |       </div>
122 |       <div className="steps">
123 |         <span>2. Create an NFT!</span>
124 |         <div>
125 |           Connect to the Ropsten Network on Metamask. Go <a href="https://faucet.ropsten.be/" target="_blank" rel="noopener noreferrer">here</a> for Ropsten Ether.
126 |         </div>
127 |       </div>
128 |       <ContractData
129 |         drizzle={drizzle}
130 |         drizzleState={drizzleState}
131 |         contract="CryptoMuseum"
132 |         method="totalSupply"
133 |         render={(supply) => (
134 |           <div>
135 |             <Button
136 |               disabled={!artwork || loading}
137 |               onClick={() => handleButtonClick(supply)}
138 |               className="button"
139 |             >
140 |             {loading
141 |               ? <Spinner animation="border" variant="light" size="sm" />
142 |               : <span>Create NFT</span>
143 |             }
144 |           </Button>
145 |         </div>
146 |         )}
147 |       />
148 |       <div className="steps">
149 |         3. Your artwork will appear in your collection once the transaction is accepted
150 |       </div>
151 |       <div>
152 |       {txQueue.length === 1 && (
153 |           <>
154 |             Minting a new token...
155 |           </>
156 |         )}
157 |         {txQueue.length > 1 && (
158 |           <>
159 |             Minting {txQueue.length} new tokens...
160 |           </>
161 |         )}
162 |       </div>
163 |       {
164 |         txQueue.length > 0 && (
165 |           <div>
166 |             <Spinner animation="border" />
167 |           </div>
168 |         )
169 |       }
170 |     </Jumbotron>
171 |     <div className="collection-title"><h1>Collection</h1></div>
172 |     <div className="colleciton-subtitle">These fine pieces of art belong to: {drizzleState.accounts[0]}</div>
173 |     <ContractData
174 |       drizzle={drizzle}
175 |       drizzleState={drizzleState}
176 |       contract="CryptoMuseum"
177 |       method="balanceOf"
178 |       methodArgs={[drizzleState.accounts[0]]}
179 |       render={(balanceOf) => {
180 |         const emptyArray = [];
181 |         const arrayLength = Number(balanceOf);
182 |         for(let i=0;i<arrayLength;i++){ emptyArray.push('') }
183 |         if(emptyArray.length === 0) {
184 |           return (
185 |             <Jumbotron className="no-artwork">
186 |               You have no artwork in your collection!
187 |             </Jumbotron>
188 |           )
189 |         }
190 |         return (
191 |             <div className="collection-container">
192 |                 {emptyArray.map(( _, index) => {
193 |                   return (
194 |                     <ContractData
195 |                       key={index}
196 |                       drizzle={drizzle}
197 |                       drizzleState={drizzleState}
198 |                       contract="CryptoMuseum"
199 |                       method="tokenOfOwnerByIndex"
200 |                       methodArgs={[drizzleState.accounts[0], arrayLength - 1 - index]}
201 |                       render={(tokenId) => (
202 |                         <>
203 |                           {getTokenDisplay(tokenId)}
204 |                         </>
205 |                       )}
206 |                     />
207 |                   )}
208 |                 )}
209 |             </div>
210 |           );
211 |       }}
212 |     />
213 |   </div>
214 |   );
215 | };
216 | 


--------------------------------------------------------------------------------
/app/src/contracts/IERC165.json:
--------------------------------------------------------------------------------
  1 | {
  2 |   "contractName": "IERC165",
  3 |   "abi": [
  4 |     {
  5 |       "inputs": [
  6 |         {
  7 |           "internalType": "bytes4",
  8 |           "name": "interfaceId",
  9 |           "type": "bytes4"
 10 |         }
 11 |       ],
 12 |       "name": "supportsInterface",
 13 |       "outputs": [
 14 |         {
 15 |           "internalType": "bool",
 16 |           "name": "",
 17 |           "type": "bool"
 18 |         }
 19 |       ],
 20 |       "stateMutability": "view",
 21 |       "type": "function"
 22 |     }
 23 |   ],
 24 |   "metadata": "{\"compiler\":{\"version\":\"0.6.2+commit.bacdbe57\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"bytes4\",\"name\":\"interfaceId\",\"type\":\"bytes4\"}],\"name\":\"supportsInterface\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"}],\"devdoc\":{\"details\":\"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}.\",\"methods\":{\"supportsInterface(bytes4)\":{\"details\":\"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.\"}}},\"userdoc\":{\"methods\":{}}},\"settings\":{\"compilationTarget\":{\"@openzeppelin/contracts/introspection/IERC165.sol\":\"IERC165\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"@openzeppelin/contracts/introspection/IERC165.sol\":{\"keccak256\":\"0x9175561c374ec1fc33045e5dfdde2057e63e00debf432875f9e1e3395d99c149\",\"urls\":[\"bzz-raw://b0167043c1938b56904deaa481a73041aa4a9e054c60db0b0dfbebfe7869c06a\",\"dweb:/ipfs/QmUoYjhymBr6WUpExKgRvKxXD5fcdpQEe1o9ResKZu6CC5\"]}},\"version\":1}",
 25 |   "bytecode": "0x",
 26 |   "deployedBytecode": "0x",
 27 |   "sourceMap": "",
 28 |   "deployedSourceMap": "",
 29 |   "source": "pragma solidity ^0.6.0;\n\n/**\n * @dev Interface of the ERC165 standard, as defined in the\n * https://eips.ethereum.org/EIPS/eip-165[EIP].\n *\n * Implementers can declare support of contract interfaces, which can then be\n * queried by others ({ERC165Checker}).\n *\n * For an implementation, see {ERC165}.\n */\ninterface IERC165 {\n    /**\n     * @dev Returns true if this contract implements the interface defined by\n     * `interfaceId`. See the corresponding\n     * https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]\n     * to learn more about how these ids are created.\n     *\n     * This function call must use less than 30 000 gas.\n     */\n    function supportsInterface(bytes4 interfaceId) external view returns (bool);\n}\n",
 30 |   "sourcePath": "@openzeppelin/contracts/introspection/IERC165.sol",
 31 |   "ast": {
 32 |     "absolutePath": "@openzeppelin/contracts/introspection/IERC165.sol",
 33 |     "exportedSymbols": {
 34 |       "IERC165": [
 35 |         212
 36 |       ]
 37 |     },
 38 |     "id": 213,
 39 |     "nodeType": "SourceUnit",
 40 |     "nodes": [
 41 |       {
 42 |         "id": 204,
 43 |         "literals": [
 44 |           "solidity",
 45 |           "^",
 46 |           "0.6",
 47 |           ".0"
 48 |         ],
 49 |         "nodeType": "PragmaDirective",
 50 |         "src": "0:23:4"
 51 |       },
 52 |       {
 53 |         "abstract": false,
 54 |         "baseContracts": [],
 55 |         "contractDependencies": [],
 56 |         "contractKind": "interface",
 57 |         "documentation": "@dev Interface of the ERC165 standard, as defined in the\nhttps://eips.ethereum.org/EIPS/eip-165[EIP].\n * Implementers can declare support of contract interfaces, which can then be\nqueried by others ({ERC165Checker}).\n * For an implementation, see {ERC165}.",
 58 |         "fullyImplemented": false,
 59 |         "id": 212,
 60 |         "linearizedBaseContracts": [
 61 |           212
 62 |         ],
 63 |         "name": "IERC165",
 64 |         "nodeType": "ContractDefinition",
 65 |         "nodes": [
 66 |           {
 67 |             "body": null,
 68 |             "documentation": "@dev Returns true if this contract implements the interface defined by\n`interfaceId`. See the corresponding\nhttps://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]\nto learn more about how these ids are created.\n     * This function call must use less than 30 000 gas.",
 69 |             "functionSelector": "01ffc9a7",
 70 |             "id": 211,
 71 |             "implemented": false,
 72 |             "kind": "function",
 73 |             "modifiers": [],
 74 |             "name": "supportsInterface",
 75 |             "nodeType": "FunctionDefinition",
 76 |             "overrides": null,
 77 |             "parameters": {
 78 |               "id": 207,
 79 |               "nodeType": "ParameterList",
 80 |               "parameters": [
 81 |                 {
 82 |                   "constant": false,
 83 |                   "id": 206,
 84 |                   "name": "interfaceId",
 85 |                   "nodeType": "VariableDeclaration",
 86 |                   "overrides": null,
 87 |                   "scope": 211,
 88 |                   "src": "701:18:4",
 89 |                   "stateVariable": false,
 90 |                   "storageLocation": "default",
 91 |                   "typeDescriptions": {
 92 |                     "typeIdentifier": "t_bytes4",
 93 |                     "typeString": "bytes4"
 94 |                   },
 95 |                   "typeName": {
 96 |                     "id": 205,
 97 |                     "name": "bytes4",
 98 |                     "nodeType": "ElementaryTypeName",
 99 |                     "src": "701:6:4",
100 |                     "typeDescriptions": {
101 |                       "typeIdentifier": "t_bytes4",
102 |                       "typeString": "bytes4"
103 |                     }
104 |                   },
105 |                   "value": null,
106 |                   "visibility": "internal"
107 |                 }
108 |               ],
109 |               "src": "700:20:4"
110 |             },
111 |             "returnParameters": {
112 |               "id": 210,
113 |               "nodeType": "ParameterList",
114 |               "parameters": [
115 |                 {
116 |                   "constant": false,
117 |                   "id": 209,
118 |                   "name": "",
119 |                   "nodeType": "VariableDeclaration",
120 |                   "overrides": null,
121 |                   "scope": 211,
122 |                   "src": "744:4:4",
123 |                   "stateVariable": false,
124 |                   "storageLocation": "default",
125 |                   "typeDescriptions": {
126 |                     "typeIdentifier": "t_bool",
127 |                     "typeString": "bool"
128 |                   },
129 |                   "typeName": {
130 |                     "id": 208,
131 |                     "name": "bool",
132 |                     "nodeType": "ElementaryTypeName",
133 |                     "src": "744:4:4",
134 |                     "typeDescriptions": {
135 |                       "typeIdentifier": "t_bool",
136 |                       "typeString": "bool"
137 |                     }
138 |                   },
139 |                   "value": null,
140 |                   "visibility": "internal"
141 |                 }
142 |               ],
143 |               "src": "743:6:4"
144 |             },
145 |             "scope": 212,
146 |             "src": "674:76:4",
147 |             "stateMutability": "view",
148 |             "virtual": false,
149 |             "visibility": "external"
150 |           }
151 |         ],
152 |         "scope": 213,
153 |         "src": "305:447:4"
154 |       }
155 |     ],
156 |     "src": "0:753:4"
157 |   },
158 |   "legacyAST": {
159 |     "absolutePath": "@openzeppelin/contracts/introspection/IERC165.sol",
160 |     "exportedSymbols": {
161 |       "IERC165": [
162 |         212
163 |       ]
164 |     },
165 |     "id": 213,
166 |     "nodeType": "SourceUnit",
167 |     "nodes": [
168 |       {
169 |         "id": 204,
170 |         "literals": [
171 |           "solidity",
172 |           "^",
173 |           "0.6",
174 |           ".0"
175 |         ],
176 |         "nodeType": "PragmaDirective",
177 |         "src": "0:23:4"
178 |       },
179 |       {
180 |         "abstract": false,
181 |         "baseContracts": [],
182 |         "contractDependencies": [],
183 |         "contractKind": "interface",
184 |         "documentation": "@dev Interface of the ERC165 standard, as defined in the\nhttps://eips.ethereum.org/EIPS/eip-165[EIP].\n * Implementers can declare support of contract interfaces, which can then be\nqueried by others ({ERC165Checker}).\n * For an implementation, see {ERC165}.",
185 |         "fullyImplemented": false,
186 |         "id": 212,
187 |         "linearizedBaseContracts": [
188 |           212
189 |         ],
190 |         "name": "IERC165",
191 |         "nodeType": "ContractDefinition",
192 |         "nodes": [
193 |           {
194 |             "body": null,
195 |             "documentation": "@dev Returns true if this contract implements the interface defined by\n`interfaceId`. See the corresponding\nhttps://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]\nto learn more about how these ids are created.\n     * This function call must use less than 30 000 gas.",
196 |             "functionSelector": "01ffc9a7",
197 |             "id": 211,
198 |             "implemented": false,
199 |             "kind": "function",
200 |             "modifiers": [],
201 |             "name": "supportsInterface",
202 |             "nodeType": "FunctionDefinition",
203 |             "overrides": null,
204 |             "parameters": {
205 |               "id": 207,
206 |               "nodeType": "ParameterList",
207 |               "parameters": [
208 |                 {
209 |                   "constant": false,
210 |                   "id": 206,
211 |                   "name": "interfaceId",
212 |                   "nodeType": "VariableDeclaration",
213 |                   "overrides": null,
214 |                   "scope": 211,
215 |                   "src": "701:18:4",
216 |                   "stateVariable": false,
217 |                   "storageLocation": "default",
218 |                   "typeDescriptions": {
219 |                     "typeIdentifier": "t_bytes4",
220 |                     "typeString": "bytes4"
221 |                   },
222 |                   "typeName": {
223 |                     "id": 205,
224 |                     "name": "bytes4",
225 |                     "nodeType": "ElementaryTypeName",
226 |                     "src": "701:6:4",
227 |                     "typeDescriptions": {
228 |                       "typeIdentifier": "t_bytes4",
229 |                       "typeString": "bytes4"
230 |                     }
231 |                   },
232 |                   "value": null,
233 |                   "visibility": "internal"
234 |                 }
235 |               ],
236 |               "src": "700:20:4"
237 |             },
238 |             "returnParameters": {
239 |               "id": 210,
240 |               "nodeType": "ParameterList",
241 |               "parameters": [
242 |                 {
243 |                   "constant": false,
244 |                   "id": 209,
245 |                   "name": "",
246 |                   "nodeType": "VariableDeclaration",
247 |                   "overrides": null,
248 |                   "scope": 211,
249 |                   "src": "744:4:4",
250 |                   "stateVariable": false,
251 |                   "storageLocation": "default",
252 |                   "typeDescriptions": {
253 |                     "typeIdentifier": "t_bool",
254 |                     "typeString": "bool"
255 |                   },
256 |                   "typeName": {
257 |                     "id": 208,
258 |                     "name": "bool",
259 |                     "nodeType": "ElementaryTypeName",
260 |                     "src": "744:4:4",
261 |                     "typeDescriptions": {
262 |                       "typeIdentifier": "t_bool",
263 |                       "typeString": "bool"
264 |                     }
265 |                   },
266 |                   "value": null,
267 |                   "visibility": "internal"
268 |                 }
269 |               ],
270 |               "src": "743:6:4"
271 |             },
272 |             "scope": 212,
273 |             "src": "674:76:4",
274 |             "stateMutability": "view",
275 |             "virtual": false,
276 |             "visibility": "external"
277 |           }
278 |         ],
279 |         "scope": 213,
280 |         "src": "305:447:4"
281 |       }
282 |     ],
283 |     "src": "0:753:4"
284 |   },
285 |   "compiler": {
286 |     "name": "solc",
287 |     "version": "0.6.2+commit.bacdbe57.Emscripten.clang"
288 |   },
289 |   "networks": {},
290 |   "schemaVersion": "3.1.0",
291 |   "updatedAt": "2020-05-16T12:08:04.818Z",
292 |   "devdoc": {
293 |     "details": "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}.",
294 |     "methods": {
295 |       "supportsInterface(bytes4)": {
296 |         "details": "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."
297 |       }
298 |     }
299 |   },
300 |   "userdoc": {
301 |     "methods": {}
302 |   }
303 | }


--------------------------------------------------------------------------------
/app/src/contracts/IERC721Receiver.json:
--------------------------------------------------------------------------------
  1 | {
  2 |   "contractName": "IERC721Receiver",
  3 |   "abi": [
  4 |     {
  5 |       "inputs": [
  6 |         {
  7 |           "internalType": "address",
  8 |           "name": "operator",
  9 |           "type": "address"
 10 |         },
 11 |         {
 12 |           "internalType": "address",
 13 |           "name": "from",
 14 |           "type": "address"
 15 |         },
 16 |         {
 17 |           "internalType": "uint256",
 18 |           "name": "tokenId",
 19 |           "type": "uint256"
 20 |         },
 21 |         {
 22 |           "internalType": "bytes",
 23 |           "name": "data",
 24 |           "type": "bytes"
 25 |         }
 26 |       ],
 27 |       "name": "onERC721Received",
 28 |       "outputs": [
 29 |         {
 30 |           "internalType": "bytes4",
 31 |           "name": "",
 32 |           "type": "bytes4"
 33 |         }
 34 |       ],
 35 |       "stateMutability": "nonpayable",
 36 |       "type": "function"
 37 |     }
 38 |   ],
 39 |   "metadata": "{\"compiler\":{\"version\":\"0.6.2+commit.bacdbe57\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[{\"internalType\":\"address\",\"name\":\"operator\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"data\",\"type\":\"bytes\"}],\"name\":\"onERC721Received\",\"outputs\":[{\"internalType\":\"bytes4\",\"name\":\"\",\"type\":\"bytes4\"}],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"details\":\"Interface for any contract that wants to support safeTransfers from ERC721 asset contracts.\",\"methods\":{\"onERC721Received(address,address,uint256,bytes)\":{\"details\":\"The ERC721 smart contract calls this function on the recipient after a {IERC721-safeTransferFrom}. This function MUST return the function selector, otherwise the caller will revert the transaction. The selector to be returned can be obtained as `this.onERC721Received.selector`. This function MAY throw to revert and reject the transfer. Note: the ERC721 contract address is always the message sender.\",\"params\":{\"data\":\"Additional data with no specified format\",\"from\":\"The address which previously owned the token\",\"operator\":\"The address which called `safeTransferFrom` function\",\"tokenId\":\"The NFT identifier which is being transferred\"},\"returns\":{\"_0\":\"bytes4 `bytes4(keccak256(\\\"onERC721Received(address,address,uint256,bytes)\\\"))`\"}}},\"title\":\"ERC721 token receiver interface\"},\"userdoc\":{\"methods\":{\"onERC721Received(address,address,uint256,bytes)\":{\"notice\":\"Handle the receipt of an NFT\"}}}},\"settings\":{\"compilationTarget\":{\"@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol\":\"IERC721Receiver\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol\":{\"keccak256\":\"0x0c25ff00a747f1df6cb5e5c103adb98334df7e9561b0d46079454131c139bff9\",\"urls\":[\"bzz-raw://9417ce94829309329fa0f0dc50089696bc55f9f675c4b2ffcb31f960fe706250\",\"dweb:/ipfs/QmdckiAmnW2uhXK2V2enu7bEbqiMR6hzMD1ytGH43pKLhE\"]}},\"version\":1}",
 40 |   "bytecode": "0x",
 41 |   "deployedBytecode": "0x",
 42 |   "sourceMap": "",
 43 |   "deployedSourceMap": "",
 44 |   "source": "pragma solidity ^0.6.0;\n\n/**\n * @title ERC721 token receiver interface\n * @dev Interface for any contract that wants to support safeTransfers\n * from ERC721 asset contracts.\n */\nabstract contract IERC721Receiver {\n    /**\n     * @notice Handle the receipt of an NFT\n     * @dev The ERC721 smart contract calls this function on the recipient\n     * after a {IERC721-safeTransferFrom}. This function MUST return the function selector,\n     * otherwise the caller will revert the transaction. The selector to be\n     * returned can be obtained as `this.onERC721Received.selector`. This\n     * function MAY throw to revert and reject the transfer.\n     * Note: the ERC721 contract address is always the message sender.\n     * @param operator The address which called `safeTransferFrom` function\n     * @param from The address which previously owned the token\n     * @param tokenId The NFT identifier which is being transferred\n     * @param data Additional data with no specified format\n     * @return bytes4 `bytes4(keccak256(\"onERC721Received(address,address,uint256,bytes)\"))`\n     */\n    function onERC721Received(address operator, address from, uint256 tokenId, bytes memory data)\n    public virtual returns (bytes4);\n}\n",
 45 |   "sourcePath": "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol",
 46 |   "ast": {
 47 |     "absolutePath": "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol",
 48 |     "exportedSymbols": {
 49 |       "IERC721Receiver": [
 50 |         1487
 51 |       ]
 52 |     },
 53 |     "id": 1488,
 54 |     "nodeType": "SourceUnit",
 55 |     "nodes": [
 56 |       {
 57 |         "id": 1473,
 58 |         "literals": [
 59 |           "solidity",
 60 |           "^",
 61 |           "0.6",
 62 |           ".0"
 63 |         ],
 64 |         "nodeType": "PragmaDirective",
 65 |         "src": "0:23:10"
 66 |       },
 67 |       {
 68 |         "abstract": true,
 69 |         "baseContracts": [],
 70 |         "contractDependencies": [],
 71 |         "contractKind": "contract",
 72 |         "documentation": "@title ERC721 token receiver interface\n@dev Interface for any contract that wants to support safeTransfers\nfrom ERC721 asset contracts.",
 73 |         "fullyImplemented": false,
 74 |         "id": 1487,
 75 |         "linearizedBaseContracts": [
 76 |           1487
 77 |         ],
 78 |         "name": "IERC721Receiver",
 79 |         "nodeType": "ContractDefinition",
 80 |         "nodes": [
 81 |           {
 82 |             "body": null,
 83 |             "documentation": "@notice Handle the receipt of an NFT\n@dev The ERC721 smart contract calls this function on the recipient\nafter a {IERC721-safeTransferFrom}. This function MUST return the function selector,\notherwise the caller will revert the transaction. The selector to be\nreturned can be obtained as `this.onERC721Received.selector`. This\nfunction MAY throw to revert and reject the transfer.\nNote: the ERC721 contract address is always the message sender.\n@param operator The address which called `safeTransferFrom` function\n@param from The address which previously owned the token\n@param tokenId The NFT identifier which is being transferred\n@param data Additional data with no specified format\n@return bytes4 `bytes4(keccak256(\"onERC721Received(address,address,uint256,bytes)\"))`",
 84 |             "functionSelector": "150b7a02",
 85 |             "id": 1486,
 86 |             "implemented": false,
 87 |             "kind": "function",
 88 |             "modifiers": [],
 89 |             "name": "onERC721Received",
 90 |             "nodeType": "FunctionDefinition",
 91 |             "overrides": null,
 92 |             "parameters": {
 93 |               "id": 1482,
 94 |               "nodeType": "ParameterList",
 95 |               "parameters": [
 96 |                 {
 97 |                   "constant": false,
 98 |                   "id": 1475,
 99 |                   "name": "operator",
100 |                   "nodeType": "VariableDeclaration",
101 |                   "overrides": null,
102 |                   "scope": 1486,
103 |                   "src": "1114:16:10",
104 |                   "stateVariable": false,
105 |                   "storageLocation": "default",
106 |                   "typeDescriptions": {
107 |                     "typeIdentifier": "t_address",
108 |                     "typeString": "address"
109 |                   },
110 |                   "typeName": {
111 |                     "id": 1474,
112 |                     "name": "address",
113 |                     "nodeType": "ElementaryTypeName",
114 |                     "src": "1114:7:10",
115 |                     "stateMutability": "nonpayable",
116 |                     "typeDescriptions": {
117 |                       "typeIdentifier": "t_address",
118 |                       "typeString": "address"
119 |                     }
120 |                   },
121 |                   "value": null,
122 |                   "visibility": "internal"
123 |                 },
124 |                 {
125 |                   "constant": false,
126 |                   "id": 1477,
127 |                   "name": "from",
128 |                   "nodeType": "VariableDeclaration",
129 |                   "overrides": null,
130 |                   "scope": 1486,
131 |                   "src": "1132:12:10",
132 |                   "stateVariable": false,
133 |                   "storageLocation": "default",
134 |                   "typeDescriptions": {
135 |                     "typeIdentifier": "t_address",
136 |                     "typeString": "address"
137 |                   },
138 |                   "typeName": {
139 |                     "id": 1476,
140 |                     "name": "address",
141 |                     "nodeType": "ElementaryTypeName",
142 |                     "src": "1132:7:10",
143 |                     "stateMutability": "nonpayable",
144 |                     "typeDescriptions": {
145 |                       "typeIdentifier": "t_address",
146 |                       "typeString": "address"
147 |                     }
148 |                   },
149 |                   "value": null,
150 |                   "visibility": "internal"
151 |                 },
152 |                 {
153 |                   "constant": false,
154 |                   "id": 1479,
155 |                   "name": "tokenId",
156 |                   "nodeType": "VariableDeclaration",
157 |                   "overrides": null,
158 |                   "scope": 1486,
159 |                   "src": "1146:15:10",
160 |                   "stateVariable": false,
161 |                   "storageLocation": "default",
162 |                   "typeDescriptions": {
163 |                     "typeIdentifier": "t_uint256",
164 |                     "typeString": "uint256"
165 |                   },
166 |                   "typeName": {
167 |                     "id": 1478,
168 |                     "name": "uint256",
169 |                     "nodeType": "ElementaryTypeName",
170 |                     "src": "1146:7:10",
171 |                     "typeDescriptions": {
172 |                       "typeIdentifier": "t_uint256",
173 |                       "typeString": "uint256"
174 |                     }
175 |                   },
176 |                   "value": null,
177 |                   "visibility": "internal"
178 |                 },
179 |                 {
180 |                   "constant": false,
181 |                   "id": 1481,
182 |                   "name": "data",
183 |                   "nodeType": "VariableDeclaration",
184 |                   "overrides": null,
185 |                   "scope": 1486,
186 |                   "src": "1163:17:10",
187 |                   "stateVariable": false,
188 |                   "storageLocation": "memory",
189 |                   "typeDescriptions": {
190 |                     "typeIdentifier": "t_bytes_memory_ptr",
191 |                     "typeString": "bytes"
192 |                   },
193 |                   "typeName": {
194 |                     "id": 1480,
195 |                     "name": "bytes",
196 |                     "nodeType": "ElementaryTypeName",
197 |                     "src": "1163:5:10",
198 |                     "typeDescriptions": {
199 |                       "typeIdentifier": "t_bytes_storage_ptr",
200 |                       "typeString": "bytes"
201 |                     }
202 |                   },
203 |                   "value": null,
204 |                   "visibility": "internal"
205 |                 }
206 |               ],
207 |               "src": "1113:68:10"
208 |             },
209 |             "returnParameters": {
210 |               "id": 1485,
211 |               "nodeType": "ParameterList",
212 |               "parameters": [
213 |                 {
214 |                   "constant": false,
215 |                   "id": 1484,
216 |                   "name": "",
217 |                   "nodeType": "VariableDeclaration",
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220 |                   "src": "1210:6:10",
221 |                   "stateVariable": false,
222 |                   "storageLocation": "default",
223 |                   "typeDescriptions": {
224 |                     "typeIdentifier": "t_bytes4",
225 |                     "typeString": "bytes4"
226 |                   },
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229 |                     "name": "bytes4",
230 |                     "nodeType": "ElementaryTypeName",
231 |                     "src": "1210:6:10",
232 |                     "typeDescriptions": {
233 |                       "typeIdentifier": "t_bytes4",
234 |                       "typeString": "bytes4"
235 |                     }
236 |                   },
237 |                   "value": null,
238 |                   "visibility": "internal"
239 |                 }
240 |               ],
241 |               "src": "1209:8:10"
242 |             },
243 |             "scope": 1487,
244 |             "src": "1088:130:10",
245 |             "stateMutability": "nonpayable",
246 |             "virtual": true,
247 |             "visibility": "public"
248 |           }
249 |         ],
250 |         "scope": 1488,
251 |         "src": "178:1042:10"
252 |       }
253 |     ],
254 |     "src": "0:1221:10"
255 |   },
256 |   "legacyAST": {
257 |     "absolutePath": "@openzeppelin/contracts/token/ERC721/IERC721Receiver.sol",
258 |     "exportedSymbols": {
259 |       "IERC721Receiver": [
260 |         1487
261 |       ]
262 |     },
263 |     "id": 1488,
264 |     "nodeType": "SourceUnit",
265 |     "nodes": [
266 |       {
267 |         "id": 1473,
268 |         "literals": [
269 |           "solidity",
270 |           "^",
271 |           "0.6",
272 |           ".0"
273 |         ],
274 |         "nodeType": "PragmaDirective",
275 |         "src": "0:23:10"
276 |       },
277 |       {
278 |         "abstract": true,
279 |         "baseContracts": [],
280 |         "contractDependencies": [],
281 |         "contractKind": "contract",
282 |         "documentation": "@title ERC721 token receiver interface\n@dev Interface for any contract that wants to support safeTransfers\nfrom ERC721 asset contracts.",
283 |         "fullyImplemented": false,
284 |         "id": 1487,
285 |         "linearizedBaseContracts": [
286 |           1487
287 |         ],
288 |         "name": "IERC721Receiver",
289 |         "nodeType": "ContractDefinition",
290 |         "nodes": [
291 |           {
292 |             "body": null,
293 |             "documentation": "@notice Handle the receipt of an NFT\n@dev The ERC721 smart contract calls this function on the recipient\nafter a {IERC721-safeTransferFrom}. This function MUST return the function selector,\notherwise the caller will revert the transaction. The selector to be\nreturned can be obtained as `this.onERC721Received.selector`. This\nfunction MAY throw to revert and reject the transfer.\nNote: the ERC721 contract address is always the message sender.\n@param operator The address which called `safeTransferFrom` function\n@param from The address which previously owned the token\n@param tokenId The NFT identifier which is being transferred\n@param data Additional data with no specified format\n@return bytes4 `bytes4(keccak256(\"onERC721Received(address,address,uint256,bytes)\"))`",
294 |             "functionSelector": "150b7a02",
295 |             "id": 1486,
296 |             "implemented": false,
297 |             "kind": "function",
298 |             "modifiers": [],
299 |             "name": "onERC721Received",
300 |             "nodeType": "FunctionDefinition",
301 |             "overrides": null,
302 |             "parameters": {
303 |               "id": 1482,
304 |               "nodeType": "ParameterList",
305 |               "parameters": [
306 |                 {
307 |                   "constant": false,
308 |                   "id": 1475,
309 |                   "name": "operator",
310 |                   "nodeType": "VariableDeclaration",
311 |                   "overrides": null,
312 |                   "scope": 1486,
313 |                   "src": "1114:16:10",
314 |                   "stateVariable": false,
315 |                   "storageLocation": "default",
316 |                   "typeDescriptions": {
317 |                     "typeIdentifier": "t_address",
318 |                     "typeString": "address"
319 |                   },
320 |                   "typeName": {
321 |                     "id": 1474,
322 |                     "name": "address",
323 |                     "nodeType": "ElementaryTypeName",
324 |                     "src": "1114:7:10",
325 |                     "stateMutability": "nonpayable",
326 |                     "typeDescriptions": {
327 |                       "typeIdentifier": "t_address",
328 |                       "typeString": "address"
329 |                     }
330 |                   },
331 |                   "value": null,
332 |                   "visibility": "internal"
333 |                 },
334 |                 {
335 |                   "constant": false,
336 |                   "id": 1477,
337 |                   "name": "from",
338 |                   "nodeType": "VariableDeclaration",
339 |                   "overrides": null,
340 |                   "scope": 1486,
341 |                   "src": "1132:12:10",
342 |                   "stateVariable": false,
343 |                   "storageLocation": "default",
344 |                   "typeDescriptions": {
345 |                     "typeIdentifier": "t_address",
346 |                     "typeString": "address"
347 |                   },
348 |                   "typeName": {
349 |                     "id": 1476,
350 |                     "name": "address",
351 |                     "nodeType": "ElementaryTypeName",
352 |                     "src": "1132:7:10",
353 |                     "stateMutability": "nonpayable",
354 |                     "typeDescriptions": {
355 |                       "typeIdentifier": "t_address",
356 |                       "typeString": "address"
357 |                     }
358 |                   },
359 |                   "value": null,
360 |                   "visibility": "internal"
361 |                 },
362 |                 {
363 |                   "constant": false,
364 |                   "id": 1479,
365 |                   "name": "tokenId",
366 |                   "nodeType": "VariableDeclaration",
367 |                   "overrides": null,
368 |                   "scope": 1486,
369 |                   "src": "1146:15:10",
370 |                   "stateVariable": false,
371 |                   "storageLocation": "default",
372 |                   "typeDescriptions": {
373 |                     "typeIdentifier": "t_uint256",
374 |                     "typeString": "uint256"
375 |                   },
376 |                   "typeName": {
377 |                     "id": 1478,
378 |                     "name": "uint256",
379 |                     "nodeType": "ElementaryTypeName",
380 |                     "src": "1146:7:10",
381 |                     "typeDescriptions": {
382 |                       "typeIdentifier": "t_uint256",
383 |                       "typeString": "uint256"
384 |                     }
385 |                   },
386 |                   "value": null,
387 |                   "visibility": "internal"
388 |                 },
389 |                 {
390 |                   "constant": false,
391 |                   "id": 1481,
392 |                   "name": "data",
393 |                   "nodeType": "VariableDeclaration",
394 |                   "overrides": null,
395 |                   "scope": 1486,
396 |                   "src": "1163:17:10",
397 |                   "stateVariable": false,
398 |                   "storageLocation": "memory",
399 |                   "typeDescriptions": {
400 |                     "typeIdentifier": "t_bytes_memory_ptr",
401 |                     "typeString": "bytes"
402 |                   },
403 |                   "typeName": {
404 |                     "id": 1480,
405 |                     "name": "bytes",
406 |                     "nodeType": "ElementaryTypeName",
407 |                     "src": "1163:5:10",
408 |                     "typeDescriptions": {
409 |                       "typeIdentifier": "t_bytes_storage_ptr",
410 |                       "typeString": "bytes"
411 |                     }
412 |                   },
413 |                   "value": null,
414 |                   "visibility": "internal"
415 |                 }
416 |               ],
417 |               "src": "1113:68:10"
418 |             },
419 |             "returnParameters": {
420 |               "id": 1485,
421 |               "nodeType": "ParameterList",
422 |               "parameters": [
423 |                 {
424 |                   "constant": false,
425 |                   "id": 1484,
426 |                   "name": "",
427 |                   "nodeType": "VariableDeclaration",
428 |                   "overrides": null,
429 |                   "scope": 1486,
430 |                   "src": "1210:6:10",
431 |                   "stateVariable": false,
432 |                   "storageLocation": "default",
433 |                   "typeDescriptions": {
434 |                     "typeIdentifier": "t_bytes4",
435 |                     "typeString": "bytes4"
436 |                   },
437 |                   "typeName": {
438 |                     "id": 1483,
439 |                     "name": "bytes4",
440 |                     "nodeType": "ElementaryTypeName",
441 |                     "src": "1210:6:10",
442 |                     "typeDescriptions": {
443 |                       "typeIdentifier": "t_bytes4",
444 |                       "typeString": "bytes4"
445 |                     }
446 |                   },
447 |                   "value": null,
448 |                   "visibility": "internal"
449 |                 }
450 |               ],
451 |               "src": "1209:8:10"
452 |             },
453 |             "scope": 1487,
454 |             "src": "1088:130:10",
455 |             "stateMutability": "nonpayable",
456 |             "virtual": true,
457 |             "visibility": "public"
458 |           }
459 |         ],
460 |         "scope": 1488,
461 |         "src": "178:1042:10"
462 |       }
463 |     ],
464 |     "src": "0:1221:10"
465 |   },
466 |   "compiler": {
467 |     "name": "solc",
468 |     "version": "0.6.2+commit.bacdbe57.Emscripten.clang"
469 |   },
470 |   "networks": {},
471 |   "schemaVersion": "3.1.0",
472 |   "updatedAt": "2020-05-16T12:08:04.860Z",
473 |   "devdoc": {
474 |     "details": "Interface for any contract that wants to support safeTransfers from ERC721 asset contracts.",
475 |     "methods": {
476 |       "onERC721Received(address,address,uint256,bytes)": {
477 |         "details": "The ERC721 smart contract calls this function on the recipient after a {IERC721-safeTransferFrom}. This function MUST return the function selector, otherwise the caller will revert the transaction. The selector to be returned can be obtained as `this.onERC721Received.selector`. This function MAY throw to revert and reject the transfer. Note: the ERC721 contract address is always the message sender.",
478 |         "params": {
479 |           "data": "Additional data with no specified format",
480 |           "from": "The address which previously owned the token",
481 |           "operator": "The address which called `safeTransferFrom` function",
482 |           "tokenId": "The NFT identifier which is being transferred"
483 |         },
484 |         "returns": {
485 |           "_0": "bytes4 `bytes4(keccak256(\"onERC721Received(address,address,uint256,bytes)\"))`"
486 |         }
487 |       }
488 |     },
489 |     "title": "ERC721 token receiver interface"
490 |   },
491 |   "userdoc": {
492 |     "methods": {
493 |       "onERC721Received(address,address,uint256,bytes)": {
494 |         "notice": "Handle the receipt of an NFT"
495 |       }
496 |     }
497 |   }
498 | }


--------------------------------------------------------------------------------
/app/src/contracts/Context.json:
--------------------------------------------------------------------------------
  1 | {
  2 |   "contractName": "Context",
  3 |   "abi": [
  4 |     {
  5 |       "inputs": [],
  6 |       "stateMutability": "nonpayable",
  7 |       "type": "constructor"
  8 |     }
  9 |   ],
 10 |   "metadata": "{\"compiler\":{\"version\":\"0.6.2+commit.bacdbe57\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"}],\"devdoc\":{\"methods\":{}},\"userdoc\":{\"methods\":{}}},\"settings\":{\"compilationTarget\":{\"@openzeppelin/contracts/GSN/Context.sol\":\"Context\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"@openzeppelin/contracts/GSN/Context.sol\":{\"keccak256\":\"0x0de74dfa6b37943c1b834cbd8fb7a8d052e5ff80c7adb33692102dd6cd2985e9\",\"urls\":[\"bzz-raw://9d2d827fcf4a838f5821732c0acd6a40d21c2a5a2cfe2563feec91465f47bb60\",\"dweb:/ipfs/Qmex3wMKf5Sghbfvr288RUg1kP2uAyTMf11w83WbMbpQQc\"]}},\"version\":1}",
 11 |   "bytecode": "0x",
 12 |   "deployedBytecode": "0x",
 13 |   "sourceMap": "",
 14 |   "deployedSourceMap": "",
 15 |   "source": "pragma solidity ^0.6.0;\n\n/*\n * @dev Provides information about the current execution context, including the\n * sender of the transaction and its data. While these are generally available\n * via msg.sender and msg.data, they should not be accessed in such a direct\n * manner, since when dealing with GSN meta-transactions the account sending and\n * paying for execution may not be the actual sender (as far as an application\n * is concerned).\n *\n * This contract is only required for intermediate, library-like contracts.\n */\ncontract Context {\n    // Empty internal constructor, to prevent people from mistakenly deploying\n    // an instance of this contract, which should be used via inheritance.\n    constructor () internal { }\n\n    function _msgSender() internal view virtual returns (address payable) {\n        return msg.sender;\n    }\n\n    function _msgData() internal view virtual returns (bytes memory) {\n        this; // silence state mutability warning without generating bytecode - see https://github.com/ethereum/solidity/issues/2691\n        return msg.data;\n    }\n}\n",
 16 |   "sourcePath": "@openzeppelin/contracts/GSN/Context.sol",
 17 |   "ast": {
 18 |     "absolutePath": "@openzeppelin/contracts/GSN/Context.sol",
 19 |     "exportedSymbols": {
 20 |       "Context": [
 21 |         149
 22 |       ]
 23 |     },
 24 |     "id": 150,
 25 |     "nodeType": "SourceUnit",
 26 |     "nodes": [
 27 |       {
 28 |         "id": 124,
 29 |         "literals": [
 30 |           "solidity",
 31 |           "^",
 32 |           "0.6",
 33 |           ".0"
 34 |         ],
 35 |         "nodeType": "PragmaDirective",
 36 |         "src": "0:23:2"
 37 |       },
 38 |       {
 39 |         "abstract": false,
 40 |         "baseContracts": [],
 41 |         "contractDependencies": [],
 42 |         "contractKind": "contract",
 43 |         "documentation": null,
 44 |         "fullyImplemented": true,
 45 |         "id": 149,
 46 |         "linearizedBaseContracts": [
 47 |           149
 48 |         ],
 49 |         "name": "Context",
 50 |         "nodeType": "ContractDefinition",
 51 |         "nodes": [
 52 |           {
 53 |             "body": {
 54 |               "id": 127,
 55 |               "nodeType": "Block",
 56 |               "src": "726:3:2",
 57 |               "statements": []
 58 |             },
 59 |             "documentation": null,
 60 |             "id": 128,
 61 |             "implemented": true,
 62 |             "kind": "constructor",
 63 |             "modifiers": [],
 64 |             "name": "",
 65 |             "nodeType": "FunctionDefinition",
 66 |             "overrides": null,
 67 |             "parameters": {
 68 |               "id": 125,
 69 |               "nodeType": "ParameterList",
 70 |               "parameters": [],
 71 |               "src": "714:2:2"
 72 |             },
 73 |             "returnParameters": {
 74 |               "id": 126,
 75 |               "nodeType": "ParameterList",
 76 |               "parameters": [],
 77 |               "src": "726:0:2"
 78 |             },
 79 |             "scope": 149,
 80 |             "src": "702:27:2",
 81 |             "stateMutability": "nonpayable",
 82 |             "virtual": false,
 83 |             "visibility": "internal"
 84 |           },
 85 |           {
 86 |             "body": {
 87 |               "id": 136,
 88 |               "nodeType": "Block",
 89 |               "src": "805:34:2",
 90 |               "statements": [
 91 |                 {
 92 |                   "expression": {
 93 |                     "argumentTypes": null,
 94 |                     "expression": {
 95 |                       "argumentTypes": null,
 96 |                       "id": 133,
 97 |                       "name": "msg",
 98 |                       "nodeType": "Identifier",
 99 |                       "overloadedDeclarations": [],
100 |                       "referencedDeclaration": -15,
101 |                       "src": "822:3:2",
102 |                       "typeDescriptions": {
103 |                         "typeIdentifier": "t_magic_message",
104 |                         "typeString": "msg"
105 |                       }
106 |                     },
107 |                     "id": 134,
108 |                     "isConstant": false,
109 |                     "isLValue": false,
110 |                     "isPure": false,
111 |                     "lValueRequested": false,
112 |                     "memberName": "sender",
113 |                     "nodeType": "MemberAccess",
114 |                     "referencedDeclaration": null,
115 |                     "src": "822:10:2",
116 |                     "typeDescriptions": {
117 |                       "typeIdentifier": "t_address_payable",
118 |                       "typeString": "address payable"
119 |                     }
120 |                   },
121 |                   "functionReturnParameters": 132,
122 |                   "id": 135,
123 |                   "nodeType": "Return",
124 |                   "src": "815:17:2"
125 |                 }
126 |               ]
127 |             },
128 |             "documentation": null,
129 |             "id": 137,
130 |             "implemented": true,
131 |             "kind": "function",
132 |             "modifiers": [],
133 |             "name": "_msgSender",
134 |             "nodeType": "FunctionDefinition",
135 |             "overrides": null,
136 |             "parameters": {
137 |               "id": 129,
138 |               "nodeType": "ParameterList",
139 |               "parameters": [],
140 |               "src": "754:2:2"
141 |             },
142 |             "returnParameters": {
143 |               "id": 132,
144 |               "nodeType": "ParameterList",
145 |               "parameters": [
146 |                 {
147 |                   "constant": false,
148 |                   "id": 131,
149 |                   "name": "",
150 |                   "nodeType": "VariableDeclaration",
151 |                   "overrides": null,
152 |                   "scope": 137,
153 |                   "src": "788:15:2",
154 |                   "stateVariable": false,
155 |                   "storageLocation": "default",
156 |                   "typeDescriptions": {
157 |                     "typeIdentifier": "t_address_payable",
158 |                     "typeString": "address payable"
159 |                   },
160 |                   "typeName": {
161 |                     "id": 130,
162 |                     "name": "address",
163 |                     "nodeType": "ElementaryTypeName",
164 |                     "src": "788:15:2",
165 |                     "stateMutability": "payable",
166 |                     "typeDescriptions": {
167 |                       "typeIdentifier": "t_address_payable",
168 |                       "typeString": "address payable"
169 |                     }
170 |                   },
171 |                   "value": null,
172 |                   "visibility": "internal"
173 |                 }
174 |               ],
175 |               "src": "787:17:2"
176 |             },
177 |             "scope": 149,
178 |             "src": "735:104:2",
179 |             "stateMutability": "view",
180 |             "virtual": true,
181 |             "visibility": "internal"
182 |           },
183 |           {
184 |             "body": {
185 |               "id": 147,
186 |               "nodeType": "Block",
187 |               "src": "910:165:2",
188 |               "statements": [
189 |                 {
190 |                   "expression": {
191 |                     "argumentTypes": null,
192 |                     "id": 142,
193 |                     "name": "this",
194 |                     "nodeType": "Identifier",
195 |                     "overloadedDeclarations": [],
196 |                     "referencedDeclaration": -28,
197 |                     "src": "920:4:2",
198 |                     "typeDescriptions": {
199 |                       "typeIdentifier": "t_contract$_Context_$149",
200 |                       "typeString": "contract Context"
201 |                     }
202 |                   },
203 |                   "id": 143,
204 |                   "nodeType": "ExpressionStatement",
205 |                   "src": "920:4:2"
206 |                 },
207 |                 {
208 |                   "expression": {
209 |                     "argumentTypes": null,
210 |                     "expression": {
211 |                       "argumentTypes": null,
212 |                       "id": 144,
213 |                       "name": "msg",
214 |                       "nodeType": "Identifier",
215 |                       "overloadedDeclarations": [],
216 |                       "referencedDeclaration": -15,
217 |                       "src": "1060:3:2",
218 |                       "typeDescriptions": {
219 |                         "typeIdentifier": "t_magic_message",
220 |                         "typeString": "msg"
221 |                       }
222 |                     },
223 |                     "id": 145,
224 |                     "isConstant": false,
225 |                     "isLValue": false,
226 |                     "isPure": false,
227 |                     "lValueRequested": false,
228 |                     "memberName": "data",
229 |                     "nodeType": "MemberAccess",
230 |                     "referencedDeclaration": null,
231 |                     "src": "1060:8:2",
232 |                     "typeDescriptions": {
233 |                       "typeIdentifier": "t_bytes_calldata_ptr",
234 |                       "typeString": "bytes calldata"
235 |                     }
236 |                   },
237 |                   "functionReturnParameters": 141,
238 |                   "id": 146,
239 |                   "nodeType": "Return",
240 |                   "src": "1053:15:2"
241 |                 }
242 |               ]
243 |             },
244 |             "documentation": null,
245 |             "id": 148,
246 |             "implemented": true,
247 |             "kind": "function",
248 |             "modifiers": [],
249 |             "name": "_msgData",
250 |             "nodeType": "FunctionDefinition",
251 |             "overrides": null,
252 |             "parameters": {
253 |               "id": 138,
254 |               "nodeType": "ParameterList",
255 |               "parameters": [],
256 |               "src": "862:2:2"
257 |             },
258 |             "returnParameters": {
259 |               "id": 141,
260 |               "nodeType": "ParameterList",
261 |               "parameters": [
262 |                 {
263 |                   "constant": false,
264 |                   "id": 140,
265 |                   "name": "",
266 |                   "nodeType": "VariableDeclaration",
267 |                   "overrides": null,
268 |                   "scope": 148,
269 |                   "src": "896:12:2",
270 |                   "stateVariable": false,
271 |                   "storageLocation": "memory",
272 |                   "typeDescriptions": {
273 |                     "typeIdentifier": "t_bytes_memory_ptr",
274 |                     "typeString": "bytes"
275 |                   },
276 |                   "typeName": {
277 |                     "id": 139,
278 |                     "name": "bytes",
279 |                     "nodeType": "ElementaryTypeName",
280 |                     "src": "896:5:2",
281 |                     "typeDescriptions": {
282 |                       "typeIdentifier": "t_bytes_storage_ptr",
283 |                       "typeString": "bytes"
284 |                     }
285 |                   },
286 |                   "value": null,
287 |                   "visibility": "internal"
288 |                 }
289 |               ],
290 |               "src": "895:14:2"
291 |             },
292 |             "scope": 149,
293 |             "src": "845:230:2",
294 |             "stateMutability": "view",
295 |             "virtual": true,
296 |             "visibility": "internal"
297 |           }
298 |         ],
299 |         "scope": 150,
300 |         "src": "525:552:2"
301 |       }
302 |     ],
303 |     "src": "0:1078:2"
304 |   },
305 |   "legacyAST": {
306 |     "absolutePath": "@openzeppelin/contracts/GSN/Context.sol",
307 |     "exportedSymbols": {
308 |       "Context": [
309 |         149
310 |       ]
311 |     },
312 |     "id": 150,
313 |     "nodeType": "SourceUnit",
314 |     "nodes": [
315 |       {
316 |         "id": 124,
317 |         "literals": [
318 |           "solidity",
319 |           "^",
320 |           "0.6",
321 |           ".0"
322 |         ],
323 |         "nodeType": "PragmaDirective",
324 |         "src": "0:23:2"
325 |       },
326 |       {
327 |         "abstract": false,
328 |         "baseContracts": [],
329 |         "contractDependencies": [],
330 |         "contractKind": "contract",
331 |         "documentation": null,
332 |         "fullyImplemented": true,
333 |         "id": 149,
334 |         "linearizedBaseContracts": [
335 |           149
336 |         ],
337 |         "name": "Context",
338 |         "nodeType": "ContractDefinition",
339 |         "nodes": [
340 |           {
341 |             "body": {
342 |               "id": 127,
343 |               "nodeType": "Block",
344 |               "src": "726:3:2",
345 |               "statements": []
346 |             },
347 |             "documentation": null,
348 |             "id": 128,
349 |             "implemented": true,
350 |             "kind": "constructor",
351 |             "modifiers": [],
352 |             "name": "",
353 |             "nodeType": "FunctionDefinition",
354 |             "overrides": null,
355 |             "parameters": {
356 |               "id": 125,
357 |               "nodeType": "ParameterList",
358 |               "parameters": [],
359 |               "src": "714:2:2"
360 |             },
361 |             "returnParameters": {
362 |               "id": 126,
363 |               "nodeType": "ParameterList",
364 |               "parameters": [],
365 |               "src": "726:0:2"
366 |             },
367 |             "scope": 149,
368 |             "src": "702:27:2",
369 |             "stateMutability": "nonpayable",
370 |             "virtual": false,
371 |             "visibility": "internal"
372 |           },
373 |           {
374 |             "body": {
375 |               "id": 136,
376 |               "nodeType": "Block",
377 |               "src": "805:34:2",
378 |               "statements": [
379 |                 {
380 |                   "expression": {
381 |                     "argumentTypes": null,
382 |                     "expression": {
383 |                       "argumentTypes": null,
384 |                       "id": 133,
385 |                       "name": "msg",
386 |                       "nodeType": "Identifier",
387 |                       "overloadedDeclarations": [],
388 |                       "referencedDeclaration": -15,
389 |                       "src": "822:3:2",
390 |                       "typeDescriptions": {
391 |                         "typeIdentifier": "t_magic_message",
392 |                         "typeString": "msg"
393 |                       }
394 |                     },
395 |                     "id": 134,
396 |                     "isConstant": false,
397 |                     "isLValue": false,
398 |                     "isPure": false,
399 |                     "lValueRequested": false,
400 |                     "memberName": "sender",
401 |                     "nodeType": "MemberAccess",
402 |                     "referencedDeclaration": null,
403 |                     "src": "822:10:2",
404 |                     "typeDescriptions": {
405 |                       "typeIdentifier": "t_address_payable",
406 |                       "typeString": "address payable"
407 |                     }
408 |                   },
409 |                   "functionReturnParameters": 132,
410 |                   "id": 135,
411 |                   "nodeType": "Return",
412 |                   "src": "815:17:2"
413 |                 }
414 |               ]
415 |             },
416 |             "documentation": null,
417 |             "id": 137,
418 |             "implemented": true,
419 |             "kind": "function",
420 |             "modifiers": [],
421 |             "name": "_msgSender",
422 |             "nodeType": "FunctionDefinition",
423 |             "overrides": null,
424 |             "parameters": {
425 |               "id": 129,
426 |               "nodeType": "ParameterList",
427 |               "parameters": [],
428 |               "src": "754:2:2"
429 |             },
430 |             "returnParameters": {
431 |               "id": 132,
432 |               "nodeType": "ParameterList",
433 |               "parameters": [
434 |                 {
435 |                   "constant": false,
436 |                   "id": 131,
437 |                   "name": "",
438 |                   "nodeType": "VariableDeclaration",
439 |                   "overrides": null,
440 |                   "scope": 137,
441 |                   "src": "788:15:2",
442 |                   "stateVariable": false,
443 |                   "storageLocation": "default",
444 |                   "typeDescriptions": {
445 |                     "typeIdentifier": "t_address_payable",
446 |                     "typeString": "address payable"
447 |                   },
448 |                   "typeName": {
449 |                     "id": 130,
450 |                     "name": "address",
451 |                     "nodeType": "ElementaryTypeName",
452 |                     "src": "788:15:2",
453 |                     "stateMutability": "payable",
454 |                     "typeDescriptions": {
455 |                       "typeIdentifier": "t_address_payable",
456 |                       "typeString": "address payable"
457 |                     }
458 |                   },
459 |                   "value": null,
460 |                   "visibility": "internal"
461 |                 }
462 |               ],
463 |               "src": "787:17:2"
464 |             },
465 |             "scope": 149,
466 |             "src": "735:104:2",
467 |             "stateMutability": "view",
468 |             "virtual": true,
469 |             "visibility": "internal"
470 |           },
471 |           {
472 |             "body": {
473 |               "id": 147,
474 |               "nodeType": "Block",
475 |               "src": "910:165:2",
476 |               "statements": [
477 |                 {
478 |                   "expression": {
479 |                     "argumentTypes": null,
480 |                     "id": 142,
481 |                     "name": "this",
482 |                     "nodeType": "Identifier",
483 |                     "overloadedDeclarations": [],
484 |                     "referencedDeclaration": -28,
485 |                     "src": "920:4:2",
486 |                     "typeDescriptions": {
487 |                       "typeIdentifier": "t_contract$_Context_$149",
488 |                       "typeString": "contract Context"
489 |                     }
490 |                   },
491 |                   "id": 143,
492 |                   "nodeType": "ExpressionStatement",
493 |                   "src": "920:4:2"
494 |                 },
495 |                 {
496 |                   "expression": {
497 |                     "argumentTypes": null,
498 |                     "expression": {
499 |                       "argumentTypes": null,
500 |                       "id": 144,
501 |                       "name": "msg",
502 |                       "nodeType": "Identifier",
503 |                       "overloadedDeclarations": [],
504 |                       "referencedDeclaration": -15,
505 |                       "src": "1060:3:2",
506 |                       "typeDescriptions": {
507 |                         "typeIdentifier": "t_magic_message",
508 |                         "typeString": "msg"
509 |                       }
510 |                     },
511 |                     "id": 145,
512 |                     "isConstant": false,
513 |                     "isLValue": false,
514 |                     "isPure": false,
515 |                     "lValueRequested": false,
516 |                     "memberName": "data",
517 |                     "nodeType": "MemberAccess",
518 |                     "referencedDeclaration": null,
519 |                     "src": "1060:8:2",
520 |                     "typeDescriptions": {
521 |                       "typeIdentifier": "t_bytes_calldata_ptr",
522 |                       "typeString": "bytes calldata"
523 |                     }
524 |                   },
525 |                   "functionReturnParameters": 141,
526 |                   "id": 146,
527 |                   "nodeType": "Return",
528 |                   "src": "1053:15:2"
529 |                 }
530 |               ]
531 |             },
532 |             "documentation": null,
533 |             "id": 148,
534 |             "implemented": true,
535 |             "kind": "function",
536 |             "modifiers": [],
537 |             "name": "_msgData",
538 |             "nodeType": "FunctionDefinition",
539 |             "overrides": null,
540 |             "parameters": {
541 |               "id": 138,
542 |               "nodeType": "ParameterList",
543 |               "parameters": [],
544 |               "src": "862:2:2"
545 |             },
546 |             "returnParameters": {
547 |               "id": 141,
548 |               "nodeType": "ParameterList",
549 |               "parameters": [
550 |                 {
551 |                   "constant": false,
552 |                   "id": 140,
553 |                   "name": "",
554 |                   "nodeType": "VariableDeclaration",
555 |                   "overrides": null,
556 |                   "scope": 148,
557 |                   "src": "896:12:2",
558 |                   "stateVariable": false,
559 |                   "storageLocation": "memory",
560 |                   "typeDescriptions": {
561 |                     "typeIdentifier": "t_bytes_memory_ptr",
562 |                     "typeString": "bytes"
563 |                   },
564 |                   "typeName": {
565 |                     "id": 139,
566 |                     "name": "bytes",
567 |                     "nodeType": "ElementaryTypeName",
568 |                     "src": "896:5:2",
569 |                     "typeDescriptions": {
570 |                       "typeIdentifier": "t_bytes_storage_ptr",
571 |                       "typeString": "bytes"
572 |                     }
573 |                   },
574 |                   "value": null,
575 |                   "visibility": "internal"
576 |                 }
577 |               ],
578 |               "src": "895:14:2"
579 |             },
580 |             "scope": 149,
581 |             "src": "845:230:2",
582 |             "stateMutability": "view",
583 |             "virtual": true,
584 |             "visibility": "internal"
585 |           }
586 |         ],
587 |         "scope": 150,
588 |         "src": "525:552:2"
589 |       }
590 |     ],
591 |     "src": "0:1078:2"
592 |   },
593 |   "compiler": {
594 |     "name": "solc",
595 |     "version": "0.6.2+commit.bacdbe57.Emscripten.clang"
596 |   },
597 |   "networks": {},
598 |   "schemaVersion": "3.1.0",
599 |   "updatedAt": "2020-05-16T12:08:04.814Z",
600 |   "devdoc": {
601 |     "methods": {}
602 |   },
603 |   "userdoc": {
604 |     "methods": {}
605 |   }
606 | }


--------------------------------------------------------------------------------
/app/src/contracts/Migrations.json:
--------------------------------------------------------------------------------
  1 | {
  2 |   "contractName": "Migrations",
  3 |   "abi": [
  4 |     {
  5 |       "inputs": [],
  6 |       "stateMutability": "nonpayable",
  7 |       "type": "constructor"
  8 |     },
  9 |     {
 10 |       "inputs": [],
 11 |       "name": "last_completed_migration",
 12 |       "outputs": [
 13 |         {
 14 |           "internalType": "uint256",
 15 |           "name": "",
 16 |           "type": "uint256"
 17 |         }
 18 |       ],
 19 |       "stateMutability": "view",
 20 |       "type": "function",
 21 |       "constant": true
 22 |     },
 23 |     {
 24 |       "inputs": [],
 25 |       "name": "owner",
 26 |       "outputs": [
 27 |         {
 28 |           "internalType": "address",
 29 |           "name": "",
 30 |           "type": "address"
 31 |         }
 32 |       ],
 33 |       "stateMutability": "view",
 34 |       "type": "function",
 35 |       "constant": true
 36 |     },
 37 |     {
 38 |       "inputs": [
 39 |         {
 40 |           "internalType": "uint256",
 41 |           "name": "completed",
 42 |           "type": "uint256"
 43 |         }
 44 |       ],
 45 |       "name": "setCompleted",
 46 |       "outputs": [],
 47 |       "stateMutability": "nonpayable",
 48 |       "type": "function"
 49 |     }
 50 |   ],
 51 |   "metadata": "{\"compiler\":{\"version\":\"0.6.2+commit.bacdbe57\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"inputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"constructor\"},{\"inputs\":[],\"name\":\"last_completed_migration\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"owner\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"completed\",\"type\":\"uint256\"}],\"name\":\"setCompleted\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"methods\":{}},\"userdoc\":{\"methods\":{}}},\"settings\":{\"compilationTarget\":{\"/home/piraya/Desktop/repos/crypto-museum/contracts/Migrations.sol\":\"Migrations\"},\"evmVersion\":\"istanbul\",\"libraries\":{},\"metadata\":{\"bytecodeHash\":\"ipfs\"},\"optimizer\":{\"enabled\":false,\"runs\":200},\"remappings\":[]},\"sources\":{\"/home/piraya/Desktop/repos/crypto-museum/contracts/Migrations.sol\":{\"keccak256\":\"0x89d703433a6fc541d2928d68938a143985aa45f279f8de7b1dd439fa064555b0\",\"urls\":[\"bzz-raw://42ecb7972267dce0097f7f03543d530ba396d182033b4c09161c0d027b4e6cd8\",\"dweb:/ipfs/QmRTUvTgL3cCPVYYsLKrw5V9XPkgXyVHPCr52kqwSH7yQ2\"]}},\"version\":1}",
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656 |               "parameters": [],
657 |               "src": "140:2:1"
658 |             },
659 |             "returnParameters": {
660 |               "id": 93,
661 |               "nodeType": "ParameterList",
662 |               "parameters": [],
663 |               "src": "150:0:1"
664 |             },
665 |             "scope": 122,
666 |             "src": "129:56:1",
667 |             "stateMutability": "nonpayable",
668 |             "virtual": false,
669 |             "visibility": "public"
670 |           },
671 |           {
672 |             "body": {
673 |               "id": 108,
674 |               "nodeType": "Block",
675 |               "src": "213:43:1",
676 |               "statements": [
677 |                 {
678 |                   "condition": {
679 |                     "argumentTypes": null,
680 |                     "commonType": {
681 |                       "typeIdentifier": "t_address",
682 |                       "typeString": "address"
683 |                     },
684 |                     "id": 105,
685 |                     "isConstant": false,
686 |                     "isLValue": false,
687 |                     "isPure": false,
688 |                     "lValueRequested": false,
689 |                     "leftExpression": {
690 |                       "argumentTypes": null,
691 |                       "expression": {
692 |                         "argumentTypes": null,
693 |                         "id": 102,
694 |                         "name": "msg",
695 |                         "nodeType": "Identifier",
696 |                         "overloadedDeclarations": [],
697 |                         "referencedDeclaration": -15,
698 |                         "src": "227:3:1",
699 |                         "typeDescriptions": {
700 |                           "typeIdentifier": "t_magic_message",
701 |                           "typeString": "msg"
702 |                         }
703 |                       },
704 |                       "id": 103,
705 |                       "isConstant": false,
706 |                       "isLValue": false,
707 |                       "isPure": false,
708 |                       "lValueRequested": false,
709 |                       "memberName": "sender",
710 |                       "nodeType": "MemberAccess",
711 |                       "referencedDeclaration": null,
712 |                       "src": "227:10:1",
713 |                       "typeDescriptions": {
714 |                         "typeIdentifier": "t_address_payable",
715 |                         "typeString": "address payable"
716 |                       }
717 |                     },
718 |                     "nodeType": "BinaryOperation",
719 |                     "operator": "==",
720 |                     "rightExpression": {
721 |                       "argumentTypes": null,
722 |                       "id": 104,
723 |                       "name": "owner",
724 |                       "nodeType": "Identifier",
725 |                       "overloadedDeclarations": [],
726 |                       "referencedDeclaration": 89,
727 |                       "src": "241:5:1",
728 |                       "typeDescriptions": {
729 |                         "typeIdentifier": "t_address",
730 |                         "typeString": "address"
731 |                       }
732 |                     },
733 |                     "src": "227:19:1",
734 |                     "typeDescriptions": {
735 |                       "typeIdentifier": "t_bool",
736 |                       "typeString": "bool"
737 |                     }
738 |                   },
739 |                   "falseBody": null,
740 |                   "id": 107,
741 |                   "nodeType": "IfStatement",
742 |                   "src": "223:26:1",
743 |                   "trueBody": {
744 |                     "id": 106,
745 |                     "nodeType": "PlaceholderStatement",
746 |                     "src": "248:1:1"
747 |                   }
748 |                 }
749 |               ]
750 |             },
751 |             "documentation": null,
752 |             "id": 109,
753 |             "name": "restricted",
754 |             "nodeType": "ModifierDefinition",
755 |             "overrides": null,
756 |             "parameters": {
757 |               "id": 101,
758 |               "nodeType": "ParameterList",
759 |               "parameters": [],
760 |               "src": "210:2:1"
761 |             },
762 |             "src": "191:65:1",
763 |             "virtual": false,
764 |             "visibility": "internal"
765 |           },
766 |           {
767 |             "body": {
768 |               "id": 120,
769 |               "nodeType": "Block",
770 |               "src": "318:53:1",
771 |               "statements": [
772 |                 {
773 |                   "expression": {
774 |                     "argumentTypes": null,
775 |                     "id": 118,
776 |                     "isConstant": false,
777 |                     "isLValue": false,
778 |                     "isPure": false,
779 |                     "lValueRequested": false,
780 |                     "leftHandSide": {
781 |                       "argumentTypes": null,
782 |                       "id": 116,
783 |                       "name": "last_completed_migration",
784 |                       "nodeType": "Identifier",
785 |                       "overloadedDeclarations": [],
786 |                       "referencedDeclaration": 91,
787 |                       "src": "328:24:1",
788 |                       "typeDescriptions": {
789 |                         "typeIdentifier": "t_uint256",
790 |                         "typeString": "uint256"
791 |                       }
792 |                     },
793 |                     "nodeType": "Assignment",
794 |                     "operator": "=",
795 |                     "rightHandSide": {
796 |                       "argumentTypes": null,
797 |                       "id": 117,
798 |                       "name": "completed",
799 |                       "nodeType": "Identifier",
800 |                       "overloadedDeclarations": [],
801 |                       "referencedDeclaration": 111,
802 |                       "src": "355:9:1",
803 |                       "typeDescriptions": {
804 |                         "typeIdentifier": "t_uint256",
805 |                         "typeString": "uint256"
806 |                       }
807 |                     },
808 |                     "src": "328:36:1",
809 |                     "typeDescriptions": {
810 |                       "typeIdentifier": "t_uint256",
811 |                       "typeString": "uint256"
812 |                     }
813 |                   },
814 |                   "id": 119,
815 |                   "nodeType": "ExpressionStatement",
816 |                   "src": "328:36:1"
817 |                 }
818 |               ]
819 |             },
820 |             "documentation": null,
821 |             "functionSelector": "fdacd576",
822 |             "id": 121,
823 |             "implemented": true,
824 |             "kind": "function",
825 |             "modifiers": [
826 |               {
827 |                 "arguments": null,
828 |                 "id": 114,
829 |                 "modifierName": {
830 |                   "argumentTypes": null,
831 |                   "id": 113,
832 |                   "name": "restricted",
833 |                   "nodeType": "Identifier",
834 |                   "overloadedDeclarations": [],
835 |                   "referencedDeclaration": 109,
836 |                   "src": "307:10:1",
837 |                   "typeDescriptions": {
838 |                     "typeIdentifier": "t_modifier$__$",
839 |                     "typeString": "modifier ()"
840 |                   }
841 |                 },
842 |                 "nodeType": "ModifierInvocation",
843 |                 "src": "307:10:1"
844 |               }
845 |             ],
846 |             "name": "setCompleted",
847 |             "nodeType": "FunctionDefinition",
848 |             "overrides": null,
849 |             "parameters": {
850 |               "id": 112,
851 |               "nodeType": "ParameterList",
852 |               "parameters": [
853 |                 {
854 |                   "constant": false,
855 |                   "id": 111,
856 |                   "name": "completed",
857 |                   "nodeType": "VariableDeclaration",
858 |                   "overrides": null,
859 |                   "scope": 121,
860 |                   "src": "284:14:1",
861 |                   "stateVariable": false,
862 |                   "storageLocation": "default",
863 |                   "typeDescriptions": {
864 |                     "typeIdentifier": "t_uint256",
865 |                     "typeString": "uint256"
866 |                   },
867 |                   "typeName": {
868 |                     "id": 110,
869 |                     "name": "uint",
870 |                     "nodeType": "ElementaryTypeName",
871 |                     "src": "284:4:1",
872 |                     "typeDescriptions": {
873 |                       "typeIdentifier": "t_uint256",
874 |                       "typeString": "uint256"
875 |                     }
876 |                   },
877 |                   "value": null,
878 |                   "visibility": "internal"
879 |                 }
880 |               ],
881 |               "src": "283:16:1"
882 |             },
883 |             "returnParameters": {
884 |               "id": 115,
885 |               "nodeType": "ParameterList",
886 |               "parameters": [],
887 |               "src": "318:0:1"
888 |             },
889 |             "scope": 122,
890 |             "src": "262:109:1",
891 |             "stateMutability": "nonpayable",
892 |             "virtual": false,
893 |             "visibility": "public"
894 |           }
895 |         ],
896 |         "scope": 123,
897 |         "src": "34:339:1"
898 |       }
899 |     ],
900 |     "src": "0:374:1"
901 |   },
902 |   "compiler": {
903 |     "name": "solc",
904 |     "version": "0.6.2+commit.bacdbe57.Emscripten.clang"
905 |   },
906 |   "networks": {
907 |     "3": {
908 |       "events": {},
909 |       "links": {},
910 |       "address": "0xB7aAf8e51103f3df21E987e4392905d89d5B81A1",
911 |       "transactionHash": "0xb9ef418f761bc413c6b1be1e979df7f7042629352c35adf3df7cfeef761f8fc5"
912 |     }
913 |   },
914 |   "schemaVersion": "3.1.0",
915 |   "updatedAt": "2020-05-16T12:09:57.152Z",
916 |   "networkType": "ethereum",
917 |   "devdoc": {
918 |     "methods": {}
919 |   },
920 |   "userdoc": {
921 |     "methods": {}
922 |   }
923 | }


--------------------------------------------------------------------------------
/app/src/contracts/IERC721Metadata.json:
--------------------------------------------------------------------------------
  1 | {
  2 |   "contractName": "IERC721Metadata",
  3 |   "abi": [
  4 |     {
  5 |       "anonymous": false,
  6 |       "inputs": [
  7 |         {
  8 |           "indexed": true,
  9 |           "internalType": "address",
 10 |           "name": "owner",
 11 |           "type": "address"
 12 |         },
 13 |         {
 14 |           "indexed": true,
 15 |           "internalType": "address",
 16 |           "name": "approved",
 17 |           "type": "address"
 18 |         },
 19 |         {
 20 |           "indexed": true,
 21 |           "internalType": "uint256",
 22 |           "name": "tokenId",
 23 |           "type": "uint256"
 24 |         }
 25 |       ],
 26 |       "name": "Approval",
 27 |       "type": "event"
 28 |     },
 29 |     {
 30 |       "anonymous": false,
 31 |       "inputs": [
 32 |         {
 33 |           "indexed": true,
 34 |           "internalType": "address",
 35 |           "name": "owner",
 36 |           "type": "address"
 37 |         },
 38 |         {
 39 |           "indexed": true,
 40 |           "internalType": "address",
 41 |           "name": "operator",
 42 |           "type": "address"
 43 |         },
 44 |         {
 45 |           "indexed": false,
 46 |           "internalType": "bool",
 47 |           "name": "approved",
 48 |           "type": "bool"
 49 |         }
 50 |       ],
 51 |       "name": "ApprovalForAll",
 52 |       "type": "event"
 53 |     },
 54 |     {
 55 |       "anonymous": false,
 56 |       "inputs": [
 57 |         {
 58 |           "indexed": true,
 59 |           "internalType": "address",
 60 |           "name": "from",
 61 |           "type": "address"
 62 |         },
 63 |         {
 64 |           "indexed": true,
 65 |           "internalType": "address",
 66 |           "name": "to",
 67 |           "type": "address"
 68 |         },
 69 |         {
 70 |           "indexed": true,
 71 |           "internalType": "uint256",
 72 |           "name": "tokenId",
 73 |           "type": "uint256"
 74 |         }
 75 |       ],
 76 |       "name": "Transfer",
 77 |       "type": "event"
 78 |     },
 79 |     {
 80 |       "inputs": [
 81 |         {
 82 |           "internalType": "address",
 83 |           "name": "to",
 84 |           "type": "address"
 85 |         },
 86 |         {
 87 |           "internalType": "uint256",
 88 |           "name": "tokenId",
 89 |           "type": "uint256"
 90 |         }
 91 |       ],
 92 |       "name": "approve",
 93 |       "outputs": [],
 94 |       "stateMutability": "nonpayable",
 95 |       "type": "function"
 96 |     },
 97 |     {
 98 |       "inputs": [
 99 |         {
100 |           "internalType": "address",
101 |           "name": "owner",
102 |           "type": "address"
103 |         }
104 |       ],
105 |       "name": "balanceOf",
106 |       "outputs": [
107 |         {
108 |           "internalType": "uint256",
109 |           "name": "balance",
110 |           "type": "uint256"
111 |         }
112 |       ],
113 |       "stateMutability": "view",
114 |       "type": "function"
115 |     },
116 |     {
117 |       "inputs": [
118 |         {
119 |           "internalType": "uint256",
120 |           "name": "tokenId",
121 |           "type": "uint256"
122 |         }
123 |       ],
124 |       "name": "getApproved",
125 |       "outputs": [
126 |         {
127 |           "internalType": "address",
128 |           "name": "operator",
129 |           "type": "address"
130 |         }
131 |       ],
132 |       "stateMutability": "view",
133 |       "type": "function"
134 |     },
135 |     {
136 |       "inputs": [
137 |         {
138 |           "internalType": "address",
139 |           "name": "owner",
140 |           "type": "address"
141 |         },
142 |         {
143 |           "internalType": "address",
144 |           "name": "operator",
145 |           "type": "address"
146 |         }
147 |       ],
148 |       "name": "isApprovedForAll",
149 |       "outputs": [
150 |         {
151 |           "internalType": "bool",
152 |           "name": "",
153 |           "type": "bool"
154 |         }
155 |       ],
156 |       "stateMutability": "view",
157 |       "type": "function"
158 |     },
159 |     {
160 |       "inputs": [
161 |         {
162 |           "internalType": "uint256",
163 |           "name": "tokenId",
164 |           "type": "uint256"
165 |         }
166 |       ],
167 |       "name": "ownerOf",
168 |       "outputs": [
169 |         {
170 |           "internalType": "address",
171 |           "name": "owner",
172 |           "type": "address"
173 |         }
174 |       ],
175 |       "stateMutability": "view",
176 |       "type": "function"
177 |     },
178 |     {
179 |       "inputs": [
180 |         {
181 |           "internalType": "address",
182 |           "name": "from",
183 |           "type": "address"
184 |         },
185 |         {
186 |           "internalType": "address",
187 |           "name": "to",
188 |           "type": "address"
189 |         },
190 |         {
191 |           "internalType": "uint256",
192 |           "name": "tokenId",
193 |           "type": "uint256"
194 |         }
195 |       ],
196 |       "name": "safeTransferFrom",
197 |       "outputs": [],
198 |       "stateMutability": "nonpayable",
199 |       "type": "function"
200 |     },
201 |     {
202 |       "inputs": [
203 |         {
204 |           "internalType": "address",
205 |           "name": "from",
206 |           "type": "address"
207 |         },
208 |         {
209 |           "internalType": "address",
210 |           "name": "to",
211 |           "type": "address"
212 |         },
213 |         {
214 |           "internalType": "uint256",
215 |           "name": "tokenId",
216 |           "type": "uint256"
217 |         },
218 |         {
219 |           "internalType": "bytes",
220 |           "name": "data",
221 |           "type": "bytes"
222 |         }
223 |       ],
224 |       "name": "safeTransferFrom",
225 |       "outputs": [],
226 |       "stateMutability": "nonpayable",
227 |       "type": "function"
228 |     },
229 |     {
230 |       "inputs": [
231 |         {
232 |           "internalType": "address",
233 |           "name": "operator",
234 |           "type": "address"
235 |         },
236 |         {
237 |           "internalType": "bool",
238 |           "name": "_approved",
239 |           "type": "bool"
240 |         }
241 |       ],
242 |       "name": "setApprovalForAll",
243 |       "outputs": [],
244 |       "stateMutability": "nonpayable",
245 |       "type": "function"
246 |     },
247 |     {
248 |       "inputs": [
249 |         {
250 |           "internalType": "bytes4",
251 |           "name": "interfaceId",
252 |           "type": "bytes4"
253 |         }
254 |       ],
255 |       "name": "supportsInterface",
256 |       "outputs": [
257 |         {
258 |           "internalType": "bool",
259 |           "name": "",
260 |           "type": "bool"
261 |         }
262 |       ],
263 |       "stateMutability": "view",
264 |       "type": "function"
265 |     },
266 |     {
267 |       "inputs": [
268 |         {
269 |           "internalType": "address",
270 |           "name": "from",
271 |           "type": "address"
272 |         },
273 |         {
274 |           "internalType": "address",
275 |           "name": "to",
276 |           "type": "address"
277 |         },
278 |         {
279 |           "internalType": "uint256",
280 |           "name": "tokenId",
281 |           "type": "uint256"
282 |         }
283 |       ],
284 |       "name": "transferFrom",
285 |       "outputs": [],
286 |       "stateMutability": "nonpayable",
287 |       "type": "function"
288 |     },
289 |     {
290 |       "inputs": [],
291 |       "name": "name",
292 |       "outputs": [
293 |         {
294 |           "internalType": "string",
295 |           "name": "",
296 |           "type": "string"
297 |         }
298 |       ],
299 |       "stateMutability": "view",
300 |       "type": "function"
301 |     },
302 |     {
303 |       "inputs": [],
304 |       "name": "symbol",
305 |       "outputs": [
306 |         {
307 |           "internalType": "string",
308 |           "name": "",
309 |           "type": "string"
310 |         }
311 |       ],
312 |       "stateMutability": "view",
313 |       "type": "function"
314 |     },
315 |     {
316 |       "inputs": [
317 |         {
318 |           "internalType": "uint256",
319 |           "name": "tokenId",
320 |           "type": "uint256"
321 |         }
322 |       ],
323 |       "name": "tokenURI",
324 |       "outputs": [
325 |         {
326 |           "internalType": "string",
327 |           "name": "",
328 |           "type": "string"
329 |         }
330 |       ],
331 |       "stateMutability": "view",
332 |       "type": "function"
333 |     }
334 |   ],
335 |   "metadata": "{\"compiler\":{\"version\":\"0.6.2+commit.bacdbe57\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"approved\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"owner\",\"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\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"balance\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"getApproved\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"operator\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"operator\",\"type\":\"address\"}],\"name\":\"isApprovedForAll\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"name\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"ownerOf\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"safeTransferFrom\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"data\",\"type\":\"bytes\"}],\"name\":\"safeTransferFrom\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"operator\",\"type\":\"address\"},{\"internalType\":\"bool\",\"name\":\"_approved\",\"type\":\"bool\"}],\"name\":\"setApprovalForAll\",\"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\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"tokenURI\",\"outputs\":[{\"internalType\":\"string\",\"name\":\"\",\"type\":\"string\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"details\":\"See https://eips.ethereum.org/EIPS/eip-721\",\"methods\":{\"approve(address,uint256)\":{\"details\":\"Gives permission to `to` to transfer `tokenId` token to another account. 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336 |   "bytecode": "0x",
337 |   "deployedBytecode": "0x",
338 |   "sourceMap": "",
339 |   "deployedSourceMap": "",
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341 |   "sourcePath": "@openzeppelin/contracts/token/ERC721/IERC721Metadata.sol",
342 |   "ast": {
343 |     "absolutePath": "@openzeppelin/contracts/token/ERC721/IERC721Metadata.sol",
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347 |       ]
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408 |         ],
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428 |             },
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524 |             "visibility": "external"
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530 |             "id": 1470,
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532 |             "kind": "function",
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539 |               "nodeType": "ParameterList",
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562 |                       "typeString": "uint256"
563 |                     }
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611 |         ],
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770 |                   "nodeType": "VariableDeclaration",
771 |                   "overrides": null,
772 |                   "scope": 1463,
773 |                   "src": "457:13:9",
774 |                   "stateVariable": false,
775 |                   "storageLocation": "memory",
776 |                   "typeDescriptions": {
777 |                     "typeIdentifier": "t_string_memory_ptr",
778 |                     "typeString": "string"
779 |                   },
780 |                   "typeName": {
781 |                     "id": 1460,
782 |                     "name": "string",
783 |                     "nodeType": "ElementaryTypeName",
784 |                     "src": "457:6:9",
785 |                     "typeDescriptions": {
786 |                       "typeIdentifier": "t_string_storage_ptr",
787 |                       "typeString": "string"
788 |                     }
789 |                   },
790 |                   "value": null,
791 |                   "visibility": "internal"
792 |                 }
793 |               ],
794 |               "src": "456:15:9"
795 |             },
796 |             "scope": 1471,
797 |             "src": "416:56:9",
798 |             "stateMutability": "view",
799 |             "virtual": false,
800 |             "visibility": "external"
801 |           },
802 |           {
803 |             "body": null,
804 |             "documentation": "@dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.",
805 |             "functionSelector": "c87b56dd",
806 |             "id": 1470,
807 |             "implemented": false,
808 |             "kind": "function",
809 |             "modifiers": [],
810 |             "name": "tokenURI",
811 |             "nodeType": "FunctionDefinition",
812 |             "overrides": null,
813 |             "parameters": {
814 |               "id": 1466,
815 |               "nodeType": "ParameterList",
816 |               "parameters": [
817 |                 {
818 |                   "constant": false,
819 |                   "id": 1465,
820 |                   "name": "tokenId",
821 |                   "nodeType": "VariableDeclaration",
822 |                   "overrides": null,
823 |                   "scope": 1470,
824 |                   "src": "591:15:9",
825 |                   "stateVariable": false,
826 |                   "storageLocation": "default",
827 |                   "typeDescriptions": {
828 |                     "typeIdentifier": "t_uint256",
829 |                     "typeString": "uint256"
830 |                   },
831 |                   "typeName": {
832 |                     "id": 1464,
833 |                     "name": "uint256",
834 |                     "nodeType": "ElementaryTypeName",
835 |                     "src": "591:7:9",
836 |                     "typeDescriptions": {
837 |                       "typeIdentifier": "t_uint256",
838 |                       "typeString": "uint256"
839 |                     }
840 |                   },
841 |                   "value": null,
842 |                   "visibility": "internal"
843 |                 }
844 |               ],
845 |               "src": "590:17:9"
846 |             },
847 |             "returnParameters": {
848 |               "id": 1469,
849 |               "nodeType": "ParameterList",
850 |               "parameters": [
851 |                 {
852 |                   "constant": false,
853 |                   "id": 1468,
854 |                   "name": "",
855 |                   "nodeType": "VariableDeclaration",
856 |                   "overrides": null,
857 |                   "scope": 1470,
858 |                   "src": "631:13:9",
859 |                   "stateVariable": false,
860 |                   "storageLocation": "memory",
861 |                   "typeDescriptions": {
862 |                     "typeIdentifier": "t_string_memory_ptr",
863 |                     "typeString": "string"
864 |                   },
865 |                   "typeName": {
866 |                     "id": 1467,
867 |                     "name": "string",
868 |                     "nodeType": "ElementaryTypeName",
869 |                     "src": "631:6:9",
870 |                     "typeDescriptions": {
871 |                       "typeIdentifier": "t_string_storage_ptr",
872 |                       "typeString": "string"
873 |                     }
874 |                   },
875 |                   "value": null,
876 |                   "visibility": "internal"
877 |                 }
878 |               ],
879 |               "src": "630:15:9"
880 |             },
881 |             "scope": 1471,
882 |             "src": "573:73:9",
883 |             "stateMutability": "view",
884 |             "virtual": false,
885 |             "visibility": "external"
886 |           }
887 |         ],
888 |         "scope": 1472,
889 |         "src": "184:464:9"
890 |       }
891 |     ],
892 |     "src": "0:649:9"
893 |   },
894 |   "compiler": {
895 |     "name": "solc",
896 |     "version": "0.6.2+commit.bacdbe57.Emscripten.clang"
897 |   },
898 |   "networks": {},
899 |   "schemaVersion": "3.1.0",
900 |   "updatedAt": "2020-05-16T12:08:04.858Z",
901 |   "devdoc": {
902 |     "details": "See https://eips.ethereum.org/EIPS/eip-721",
903 |     "methods": {
904 |       "approve(address,uint256)": {
905 |         "details": "Gives permission to `to` to transfer `tokenId` token to another account. The approval is cleared when the token is transferred.     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.     * Requirements:     * - The caller must own the token or be an approved operator. - `tokenId` must exist.     * Emits an {Approval} event."
906 |       },
907 |       "balanceOf(address)": {
908 |         "details": "Returns the number of tokens in ``owner``'s account."
909 |       },
910 |       "getApproved(uint256)": {
911 |         "details": "Returns the account approved for `tokenId` token.     * Requirements:     * - `tokenId` must exist."
912 |       },
913 |       "isApprovedForAll(address,address)": {
914 |         "details": "Returns if the `operator` is allowed to manage all of the assets of `owner`.     * See {setApprovalForAll}"
915 |       },
916 |       "name()": {
917 |         "details": "Returns the token collection name."
918 |       },
919 |       "ownerOf(uint256)": {
920 |         "details": "Returns the owner of the `tokenId` token.     * Requirements:     * - `tokenId` must exist."
921 |       },
922 |       "safeTransferFrom(address,address,uint256)": {
923 |         "details": "Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients are aware of the ERC721 protocol to prevent tokens from being forever locked.     * Requirements:     * - `from`, `to` cannot be zero. - `tokenId` token must exist and be owned by `from`. - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.     * Emits a {Transfer} event."
924 |       },
925 |       "safeTransferFrom(address,address,uint256,bytes)": {
926 |         "details": "Safely transfers `tokenId` token from `from` to `to`.      * Requirements:      * - `from`, `to` cannot be zero. - `tokenId` token must exist and be owned by `from`. - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.      * Emits a {Transfer} event."
927 |       },
928 |       "setApprovalForAll(address,bool)": {
929 |         "details": "Approve or remove `operator` as an operator for the caller. Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.     * Requirements:     * - The `operator` cannot be the caller.     * Emits an {ApprovalForAll} event."
930 |       },
931 |       "supportsInterface(bytes4)": {
932 |         "details": "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."
933 |       },
934 |       "symbol()": {
935 |         "details": "Returns the token collection symbol."
936 |       },
937 |       "tokenURI(uint256)": {
938 |         "details": "Returns the Uniform Resource Identifier (URI) for `tokenId` token."
939 |       },
940 |       "transferFrom(address,address,uint256)": {
941 |         "details": "Transfers `tokenId` token from `from` to `to`.     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.     * Requirements:     * - `from`, `to` cannot be zero. - `tokenId` token must be owned by `from`. - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.     * Emits a {Transfer} event."
942 |       }
943 |     },
944 |     "title": "ERC-721 Non-Fungible Token Standard, optional metadata extension"
945 |   },
946 |   "userdoc": {
947 |     "methods": {}
948 |   }
949 | }


--------------------------------------------------------------------------------
/app/src/contracts/IERC721Enumerable.json:
--------------------------------------------------------------------------------
   1 | {
   2 |   "contractName": "IERC721Enumerable",
   3 |   "abi": [
   4 |     {
   5 |       "anonymous": false,
   6 |       "inputs": [
   7 |         {
   8 |           "indexed": true,
   9 |           "internalType": "address",
  10 |           "name": "owner",
  11 |           "type": "address"
  12 |         },
  13 |         {
  14 |           "indexed": true,
  15 |           "internalType": "address",
  16 |           "name": "approved",
  17 |           "type": "address"
  18 |         },
  19 |         {
  20 |           "indexed": true,
  21 |           "internalType": "uint256",
  22 |           "name": "tokenId",
  23 |           "type": "uint256"
  24 |         }
  25 |       ],
  26 |       "name": "Approval",
  27 |       "type": "event"
  28 |     },
  29 |     {
  30 |       "anonymous": false,
  31 |       "inputs": [
  32 |         {
  33 |           "indexed": true,
  34 |           "internalType": "address",
  35 |           "name": "owner",
  36 |           "type": "address"
  37 |         },
  38 |         {
  39 |           "indexed": true,
  40 |           "internalType": "address",
  41 |           "name": "operator",
  42 |           "type": "address"
  43 |         },
  44 |         {
  45 |           "indexed": false,
  46 |           "internalType": "bool",
  47 |           "name": "approved",
  48 |           "type": "bool"
  49 |         }
  50 |       ],
  51 |       "name": "ApprovalForAll",
  52 |       "type": "event"
  53 |     },
  54 |     {
  55 |       "anonymous": false,
  56 |       "inputs": [
  57 |         {
  58 |           "indexed": true,
  59 |           "internalType": "address",
  60 |           "name": "from",
  61 |           "type": "address"
  62 |         },
  63 |         {
  64 |           "indexed": true,
  65 |           "internalType": "address",
  66 |           "name": "to",
  67 |           "type": "address"
  68 |         },
  69 |         {
  70 |           "indexed": true,
  71 |           "internalType": "uint256",
  72 |           "name": "tokenId",
  73 |           "type": "uint256"
  74 |         }
  75 |       ],
  76 |       "name": "Transfer",
  77 |       "type": "event"
  78 |     },
  79 |     {
  80 |       "inputs": [
  81 |         {
  82 |           "internalType": "address",
  83 |           "name": "to",
  84 |           "type": "address"
  85 |         },
  86 |         {
  87 |           "internalType": "uint256",
  88 |           "name": "tokenId",
  89 |           "type": "uint256"
  90 |         }
  91 |       ],
  92 |       "name": "approve",
  93 |       "outputs": [],
  94 |       "stateMutability": "nonpayable",
  95 |       "type": "function"
  96 |     },
  97 |     {
  98 |       "inputs": [
  99 |         {
 100 |           "internalType": "address",
 101 |           "name": "owner",
 102 |           "type": "address"
 103 |         }
 104 |       ],
 105 |       "name": "balanceOf",
 106 |       "outputs": [
 107 |         {
 108 |           "internalType": "uint256",
 109 |           "name": "balance",
 110 |           "type": "uint256"
 111 |         }
 112 |       ],
 113 |       "stateMutability": "view",
 114 |       "type": "function"
 115 |     },
 116 |     {
 117 |       "inputs": [
 118 |         {
 119 |           "internalType": "uint256",
 120 |           "name": "tokenId",
 121 |           "type": "uint256"
 122 |         }
 123 |       ],
 124 |       "name": "getApproved",
 125 |       "outputs": [
 126 |         {
 127 |           "internalType": "address",
 128 |           "name": "operator",
 129 |           "type": "address"
 130 |         }
 131 |       ],
 132 |       "stateMutability": "view",
 133 |       "type": "function"
 134 |     },
 135 |     {
 136 |       "inputs": [
 137 |         {
 138 |           "internalType": "address",
 139 |           "name": "owner",
 140 |           "type": "address"
 141 |         },
 142 |         {
 143 |           "internalType": "address",
 144 |           "name": "operator",
 145 |           "type": "address"
 146 |         }
 147 |       ],
 148 |       "name": "isApprovedForAll",
 149 |       "outputs": [
 150 |         {
 151 |           "internalType": "bool",
 152 |           "name": "",
 153 |           "type": "bool"
 154 |         }
 155 |       ],
 156 |       "stateMutability": "view",
 157 |       "type": "function"
 158 |     },
 159 |     {
 160 |       "inputs": [
 161 |         {
 162 |           "internalType": "uint256",
 163 |           "name": "tokenId",
 164 |           "type": "uint256"
 165 |         }
 166 |       ],
 167 |       "name": "ownerOf",
 168 |       "outputs": [
 169 |         {
 170 |           "internalType": "address",
 171 |           "name": "owner",
 172 |           "type": "address"
 173 |         }
 174 |       ],
 175 |       "stateMutability": "view",
 176 |       "type": "function"
 177 |     },
 178 |     {
 179 |       "inputs": [
 180 |         {
 181 |           "internalType": "address",
 182 |           "name": "from",
 183 |           "type": "address"
 184 |         },
 185 |         {
 186 |           "internalType": "address",
 187 |           "name": "to",
 188 |           "type": "address"
 189 |         },
 190 |         {
 191 |           "internalType": "uint256",
 192 |           "name": "tokenId",
 193 |           "type": "uint256"
 194 |         }
 195 |       ],
 196 |       "name": "safeTransferFrom",
 197 |       "outputs": [],
 198 |       "stateMutability": "nonpayable",
 199 |       "type": "function"
 200 |     },
 201 |     {
 202 |       "inputs": [
 203 |         {
 204 |           "internalType": "address",
 205 |           "name": "from",
 206 |           "type": "address"
 207 |         },
 208 |         {
 209 |           "internalType": "address",
 210 |           "name": "to",
 211 |           "type": "address"
 212 |         },
 213 |         {
 214 |           "internalType": "uint256",
 215 |           "name": "tokenId",
 216 |           "type": "uint256"
 217 |         },
 218 |         {
 219 |           "internalType": "bytes",
 220 |           "name": "data",
 221 |           "type": "bytes"
 222 |         }
 223 |       ],
 224 |       "name": "safeTransferFrom",
 225 |       "outputs": [],
 226 |       "stateMutability": "nonpayable",
 227 |       "type": "function"
 228 |     },
 229 |     {
 230 |       "inputs": [
 231 |         {
 232 |           "internalType": "address",
 233 |           "name": "operator",
 234 |           "type": "address"
 235 |         },
 236 |         {
 237 |           "internalType": "bool",
 238 |           "name": "_approved",
 239 |           "type": "bool"
 240 |         }
 241 |       ],
 242 |       "name": "setApprovalForAll",
 243 |       "outputs": [],
 244 |       "stateMutability": "nonpayable",
 245 |       "type": "function"
 246 |     },
 247 |     {
 248 |       "inputs": [
 249 |         {
 250 |           "internalType": "bytes4",
 251 |           "name": "interfaceId",
 252 |           "type": "bytes4"
 253 |         }
 254 |       ],
 255 |       "name": "supportsInterface",
 256 |       "outputs": [
 257 |         {
 258 |           "internalType": "bool",
 259 |           "name": "",
 260 |           "type": "bool"
 261 |         }
 262 |       ],
 263 |       "stateMutability": "view",
 264 |       "type": "function"
 265 |     },
 266 |     {
 267 |       "inputs": [
 268 |         {
 269 |           "internalType": "address",
 270 |           "name": "from",
 271 |           "type": "address"
 272 |         },
 273 |         {
 274 |           "internalType": "address",
 275 |           "name": "to",
 276 |           "type": "address"
 277 |         },
 278 |         {
 279 |           "internalType": "uint256",
 280 |           "name": "tokenId",
 281 |           "type": "uint256"
 282 |         }
 283 |       ],
 284 |       "name": "transferFrom",
 285 |       "outputs": [],
 286 |       "stateMutability": "nonpayable",
 287 |       "type": "function"
 288 |     },
 289 |     {
 290 |       "inputs": [],
 291 |       "name": "totalSupply",
 292 |       "outputs": [
 293 |         {
 294 |           "internalType": "uint256",
 295 |           "name": "",
 296 |           "type": "uint256"
 297 |         }
 298 |       ],
 299 |       "stateMutability": "view",
 300 |       "type": "function"
 301 |     },
 302 |     {
 303 |       "inputs": [
 304 |         {
 305 |           "internalType": "address",
 306 |           "name": "owner",
 307 |           "type": "address"
 308 |         },
 309 |         {
 310 |           "internalType": "uint256",
 311 |           "name": "index",
 312 |           "type": "uint256"
 313 |         }
 314 |       ],
 315 |       "name": "tokenOfOwnerByIndex",
 316 |       "outputs": [
 317 |         {
 318 |           "internalType": "uint256",
 319 |           "name": "tokenId",
 320 |           "type": "uint256"
 321 |         }
 322 |       ],
 323 |       "stateMutability": "view",
 324 |       "type": "function"
 325 |     },
 326 |     {
 327 |       "inputs": [
 328 |         {
 329 |           "internalType": "uint256",
 330 |           "name": "index",
 331 |           "type": "uint256"
 332 |         }
 333 |       ],
 334 |       "name": "tokenByIndex",
 335 |       "outputs": [
 336 |         {
 337 |           "internalType": "uint256",
 338 |           "name": "",
 339 |           "type": "uint256"
 340 |         }
 341 |       ],
 342 |       "stateMutability": "view",
 343 |       "type": "function"
 344 |     }
 345 |   ],
 346 |   "metadata": "{\"compiler\":{\"version\":\"0.6.2+commit.bacdbe57\"},\"language\":\"Solidity\",\"output\":{\"abi\":[{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"approved\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"Approval\",\"type\":\"event\"},{\"anonymous\":false,\"inputs\":[{\"indexed\":true,\"internalType\":\"address\",\"name\":\"owner\",\"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\":\"from\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"indexed\":true,\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"Transfer\",\"type\":\"event\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"approve\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"}],\"name\":\"balanceOf\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"balance\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"getApproved\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"operator\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"operator\",\"type\":\"address\"}],\"name\":\"isApprovedForAll\",\"outputs\":[{\"internalType\":\"bool\",\"name\":\"\",\"type\":\"bool\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"ownerOf\",\"outputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"safeTransferFrom\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"},{\"internalType\":\"bytes\",\"name\":\"data\",\"type\":\"bytes\"}],\"name\":\"safeTransferFrom\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"operator\",\"type\":\"address\"},{\"internalType\":\"bool\",\"name\":\"_approved\",\"type\":\"bool\"}],\"name\":\"setApprovalForAll\",\"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\":[{\"internalType\":\"uint256\",\"name\":\"index\",\"type\":\"uint256\"}],\"name\":\"tokenByIndex\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"owner\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"index\",\"type\":\"uint256\"}],\"name\":\"tokenOfOwnerByIndex\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[],\"name\":\"totalSupply\",\"outputs\":[{\"internalType\":\"uint256\",\"name\":\"\",\"type\":\"uint256\"}],\"stateMutability\":\"view\",\"type\":\"function\"},{\"inputs\":[{\"internalType\":\"address\",\"name\":\"from\",\"type\":\"address\"},{\"internalType\":\"address\",\"name\":\"to\",\"type\":\"address\"},{\"internalType\":\"uint256\",\"name\":\"tokenId\",\"type\":\"uint256\"}],\"name\":\"transferFrom\",\"outputs\":[],\"stateMutability\":\"nonpayable\",\"type\":\"function\"}],\"devdoc\":{\"details\":\"See https://eips.ethereum.org/EIPS/eip-721\",\"methods\":{\"approve(address,uint256)\":{\"details\":\"Gives permission to `to` to transfer `tokenId` token to another account. 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 347 |   "bytecode": "0x",
 348 |   "deployedBytecode": "0x",
 349 |   "sourceMap": "",
 350 |   "deployedSourceMap": "",
 351 |   "source": "pragma solidity ^0.6.2;\n\nimport \"./IERC721.sol\";\n\n/**\n * @title ERC-721 Non-Fungible Token Standard, optional enumeration extension\n * @dev See https://eips.ethereum.org/EIPS/eip-721\n */\ninterface IERC721Enumerable is IERC721 {\n\n    /**\n     * @dev Returns the total amount of tokens stored by the contract.\n     */\n    function totalSupply() external view returns (uint256);\n\n    /**\n     * @dev Returns a token ID owned by `owner` at a given `index` of its token list.\n     * Use along with {balanceOf} to enumerate all of ``owner``'s tokens.\n     */\n    function tokenOfOwnerByIndex(address owner, uint256 index) external view returns (uint256 tokenId);\n\n    /**\n     * @dev Returns a token ID at a given `index` of all the tokens stored by the contract.\n     * Use along with {totalSupply} to enumerate all tokens.\n     */\n    function tokenByIndex(uint256 index) external view returns (uint256);\n}\n",
 352 |   "sourcePath": "@openzeppelin/contracts/token/ERC721/IERC721Enumerable.sol",
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 359 |     },
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 361 |     "nodeType": "SourceUnit",
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 365 |         "literals": [
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 374 |       {
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 378 |         "nodeType": "ImportDirective",
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 399 |                 "typeString": "contract IERC721"
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 401 |             },
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 403 |             "nodeType": "InheritanceSpecifier",
 404 |             "src": "218:7:8"
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 406 |         ],
 407 |         "contractDependencies": [
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 411 |         "contractKind": "interface",
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 428 |             "implemented": false,
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 748 |           1448,
 749 |           1421,
 750 |           212
 751 |         ],
 752 |         "name": "IERC721Enumerable",
 753 |         "nodeType": "ContractDefinition",
 754 |         "nodes": [
 755 |           {
 756 |             "body": null,
 757 |             "documentation": "@dev Returns the total amount of tokens stored by the contract.",
 758 |             "functionSelector": "18160ddd",
 759 |             "id": 1431,
 760 |             "implemented": false,
 761 |             "kind": "function",
 762 |             "modifiers": [],
 763 |             "name": "totalSupply",
 764 |             "nodeType": "FunctionDefinition",
 765 |             "overrides": null,
 766 |             "parameters": {
 767 |               "id": 1427,
 768 |               "nodeType": "ParameterList",
 769 |               "parameters": [],
 770 |               "src": "340:2:8"
 771 |             },
 772 |             "returnParameters": {
 773 |               "id": 1430,
 774 |               "nodeType": "ParameterList",
 775 |               "parameters": [
 776 |                 {
 777 |                   "constant": false,
 778 |                   "id": 1429,
 779 |                   "name": "",
 780 |                   "nodeType": "VariableDeclaration",
 781 |                   "overrides": null,
 782 |                   "scope": 1431,
 783 |                   "src": "366:7:8",
 784 |                   "stateVariable": false,
 785 |                   "storageLocation": "default",
 786 |                   "typeDescriptions": {
 787 |                     "typeIdentifier": "t_uint256",
 788 |                     "typeString": "uint256"
 789 |                   },
 790 |                   "typeName": {
 791 |                     "id": 1428,
 792 |                     "name": "uint256",
 793 |                     "nodeType": "ElementaryTypeName",
 794 |                     "src": "366:7:8",
 795 |                     "typeDescriptions": {
 796 |                       "typeIdentifier": "t_uint256",
 797 |                       "typeString": "uint256"
 798 |                     }
 799 |                   },
 800 |                   "value": null,
 801 |                   "visibility": "internal"
 802 |                 }
 803 |               ],
 804 |               "src": "365:9:8"
 805 |             },
 806 |             "scope": 1448,
 807 |             "src": "320:55:8",
 808 |             "stateMutability": "view",
 809 |             "virtual": false,
 810 |             "visibility": "external"
 811 |           },
 812 |           {
 813 |             "body": null,
 814 |             "documentation": "@dev Returns a token ID owned by `owner` at a given `index` of its token list.\nUse along with {balanceOf} to enumerate all of ``owner``'s tokens.",
 815 |             "functionSelector": "2f745c59",
 816 |             "id": 1440,
 817 |             "implemented": false,
 818 |             "kind": "function",
 819 |             "modifiers": [],
 820 |             "name": "tokenOfOwnerByIndex",
 821 |             "nodeType": "FunctionDefinition",
 822 |             "overrides": null,
 823 |             "parameters": {
 824 |               "id": 1436,
 825 |               "nodeType": "ParameterList",
 826 |               "parameters": [
 827 |                 {
 828 |                   "constant": false,
 829 |                   "id": 1433,
 830 |                   "name": "owner",
 831 |                   "nodeType": "VariableDeclaration",
 832 |                   "overrides": null,
 833 |                   "scope": 1440,
 834 |                   "src": "586:13:8",
 835 |                   "stateVariable": false,
 836 |                   "storageLocation": "default",
 837 |                   "typeDescriptions": {
 838 |                     "typeIdentifier": "t_address",
 839 |                     "typeString": "address"
 840 |                   },
 841 |                   "typeName": {
 842 |                     "id": 1432,
 843 |                     "name": "address",
 844 |                     "nodeType": "ElementaryTypeName",
 845 |                     "src": "586:7:8",
 846 |                     "stateMutability": "nonpayable",
 847 |                     "typeDescriptions": {
 848 |                       "typeIdentifier": "t_address",
 849 |                       "typeString": "address"
 850 |                     }
 851 |                   },
 852 |                   "value": null,
 853 |                   "visibility": "internal"
 854 |                 },
 855 |                 {
 856 |                   "constant": false,
 857 |                   "id": 1435,
 858 |                   "name": "index",
 859 |                   "nodeType": "VariableDeclaration",
 860 |                   "overrides": null,
 861 |                   "scope": 1440,
 862 |                   "src": "601:13:8",
 863 |                   "stateVariable": false,
 864 |                   "storageLocation": "default",
 865 |                   "typeDescriptions": {
 866 |                     "typeIdentifier": "t_uint256",
 867 |                     "typeString": "uint256"
 868 |                   },
 869 |                   "typeName": {
 870 |                     "id": 1434,
 871 |                     "name": "uint256",
 872 |                     "nodeType": "ElementaryTypeName",
 873 |                     "src": "601:7:8",
 874 |                     "typeDescriptions": {
 875 |                       "typeIdentifier": "t_uint256",
 876 |                       "typeString": "uint256"
 877 |                     }
 878 |                   },
 879 |                   "value": null,
 880 |                   "visibility": "internal"
 881 |                 }
 882 |               ],
 883 |               "src": "585:30:8"
 884 |             },
 885 |             "returnParameters": {
 886 |               "id": 1439,
 887 |               "nodeType": "ParameterList",
 888 |               "parameters": [
 889 |                 {
 890 |                   "constant": false,
 891 |                   "id": 1438,
 892 |                   "name": "tokenId",
 893 |                   "nodeType": "VariableDeclaration",
 894 |                   "overrides": null,
 895 |                   "scope": 1440,
 896 |                   "src": "639:15:8",
 897 |                   "stateVariable": false,
 898 |                   "storageLocation": "default",
 899 |                   "typeDescriptions": {
 900 |                     "typeIdentifier": "t_uint256",
 901 |                     "typeString": "uint256"
 902 |                   },
 903 |                   "typeName": {
 904 |                     "id": 1437,
 905 |                     "name": "uint256",
 906 |                     "nodeType": "ElementaryTypeName",
 907 |                     "src": "639:7:8",
 908 |                     "typeDescriptions": {
 909 |                       "typeIdentifier": "t_uint256",
 910 |                       "typeString": "uint256"
 911 |                     }
 912 |                   },
 913 |                   "value": null,
 914 |                   "visibility": "internal"
 915 |                 }
 916 |               ],
 917 |               "src": "638:17:8"
 918 |             },
 919 |             "scope": 1448,
 920 |             "src": "557:99:8",
 921 |             "stateMutability": "view",
 922 |             "virtual": false,
 923 |             "visibility": "external"
 924 |           },
 925 |           {
 926 |             "body": null,
 927 |             "documentation": "@dev Returns a token ID at a given `index` of all the tokens stored by the contract.\nUse along with {totalSupply} to enumerate all tokens.",
 928 |             "functionSelector": "4f6ccce7",
 929 |             "id": 1447,
 930 |             "implemented": false,
 931 |             "kind": "function",
 932 |             "modifiers": [],
 933 |             "name": "tokenByIndex",
 934 |             "nodeType": "FunctionDefinition",
 935 |             "overrides": null,
 936 |             "parameters": {
 937 |               "id": 1443,
 938 |               "nodeType": "ParameterList",
 939 |               "parameters": [
 940 |                 {
 941 |                   "constant": false,
 942 |                   "id": 1442,
 943 |                   "name": "index",
 944 |                   "nodeType": "VariableDeclaration",
 945 |                   "overrides": null,
 946 |                   "scope": 1447,
 947 |                   "src": "853:13:8",
 948 |                   "stateVariable": false,
 949 |                   "storageLocation": "default",
 950 |                   "typeDescriptions": {
 951 |                     "typeIdentifier": "t_uint256",
 952 |                     "typeString": "uint256"
 953 |                   },
 954 |                   "typeName": {
 955 |                     "id": 1441,
 956 |                     "name": "uint256",
 957 |                     "nodeType": "ElementaryTypeName",
 958 |                     "src": "853:7:8",
 959 |                     "typeDescriptions": {
 960 |                       "typeIdentifier": "t_uint256",
 961 |                       "typeString": "uint256"
 962 |                     }
 963 |                   },
 964 |                   "value": null,
 965 |                   "visibility": "internal"
 966 |                 }
 967 |               ],
 968 |               "src": "852:15:8"
 969 |             },
 970 |             "returnParameters": {
 971 |               "id": 1446,
 972 |               "nodeType": "ParameterList",
 973 |               "parameters": [
 974 |                 {
 975 |                   "constant": false,
 976 |                   "id": 1445,
 977 |                   "name": "",
 978 |                   "nodeType": "VariableDeclaration",
 979 |                   "overrides": null,
 980 |                   "scope": 1447,
 981 |                   "src": "891:7:8",
 982 |                   "stateVariable": false,
 983 |                   "storageLocation": "default",
 984 |                   "typeDescriptions": {
 985 |                     "typeIdentifier": "t_uint256",
 986 |                     "typeString": "uint256"
 987 |                   },
 988 |                   "typeName": {
 989 |                     "id": 1444,
 990 |                     "name": "uint256",
 991 |                     "nodeType": "ElementaryTypeName",
 992 |                     "src": "891:7:8",
 993 |                     "typeDescriptions": {
 994 |                       "typeIdentifier": "t_uint256",
 995 |                       "typeString": "uint256"
 996 |                     }
 997 |                   },
 998 |                   "value": null,
 999 |                   "visibility": "internal"
1000 |                 }
1001 |               ],
1002 |               "src": "890:9:8"
1003 |             },
1004 |             "scope": 1448,
1005 |             "src": "831:69:8",
1006 |             "stateMutability": "view",
1007 |             "virtual": false,
1008 |             "visibility": "external"
1009 |           }
1010 |         ],
1011 |         "scope": 1449,
1012 |         "src": "187:715:8"
1013 |       }
1014 |     ],
1015 |     "src": "0:903:8"
1016 |   },
1017 |   "compiler": {
1018 |     "name": "solc",
1019 |     "version": "0.6.2+commit.bacdbe57.Emscripten.clang"
1020 |   },
1021 |   "networks": {},
1022 |   "schemaVersion": "3.1.0",
1023 |   "updatedAt": "2020-05-16T12:08:04.856Z",
1024 |   "devdoc": {
1025 |     "details": "See https://eips.ethereum.org/EIPS/eip-721",
1026 |     "methods": {
1027 |       "approve(address,uint256)": {
1028 |         "details": "Gives permission to `to` to transfer `tokenId` token to another account. The approval is cleared when the token is transferred.     * Only a single account can be approved at a time, so approving the zero address clears previous approvals.     * Requirements:     * - The caller must own the token or be an approved operator. - `tokenId` must exist.     * Emits an {Approval} event."
1029 |       },
1030 |       "balanceOf(address)": {
1031 |         "details": "Returns the number of tokens in ``owner``'s account."
1032 |       },
1033 |       "getApproved(uint256)": {
1034 |         "details": "Returns the account approved for `tokenId` token.     * Requirements:     * - `tokenId` must exist."
1035 |       },
1036 |       "isApprovedForAll(address,address)": {
1037 |         "details": "Returns if the `operator` is allowed to manage all of the assets of `owner`.     * See {setApprovalForAll}"
1038 |       },
1039 |       "ownerOf(uint256)": {
1040 |         "details": "Returns the owner of the `tokenId` token.     * Requirements:     * - `tokenId` must exist."
1041 |       },
1042 |       "safeTransferFrom(address,address,uint256)": {
1043 |         "details": "Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients are aware of the ERC721 protocol to prevent tokens from being forever locked.     * Requirements:     * - `from`, `to` cannot be zero. - `tokenId` token must exist and be owned by `from`. - If the caller is not `from`, it must be have been allowed to move this token by either {approve} or {setApprovalForAll}. - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.     * Emits a {Transfer} event."
1044 |       },
1045 |       "safeTransferFrom(address,address,uint256,bytes)": {
1046 |         "details": "Safely transfers `tokenId` token from `from` to `to`.      * Requirements:      * - `from`, `to` cannot be zero. - `tokenId` token must exist and be owned by `from`. - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}. - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.      * Emits a {Transfer} event."
1047 |       },
1048 |       "setApprovalForAll(address,bool)": {
1049 |         "details": "Approve or remove `operator` as an operator for the caller. Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.     * Requirements:     * - The `operator` cannot be the caller.     * Emits an {ApprovalForAll} event."
1050 |       },
1051 |       "supportsInterface(bytes4)": {
1052 |         "details": "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."
1053 |       },
1054 |       "tokenByIndex(uint256)": {
1055 |         "details": "Returns a token ID at a given `index` of all the tokens stored by the contract. Use along with {totalSupply} to enumerate all tokens."
1056 |       },
1057 |       "tokenOfOwnerByIndex(address,uint256)": {
1058 |         "details": "Returns a token ID owned by `owner` at a given `index` of its token list. Use along with {balanceOf} to enumerate all of ``owner``'s tokens."
1059 |       },
1060 |       "totalSupply()": {
1061 |         "details": "Returns the total amount of tokens stored by the contract."
1062 |       },
1063 |       "transferFrom(address,address,uint256)": {
1064 |         "details": "Transfers `tokenId` token from `from` to `to`.     * WARNING: Usage of this method is discouraged, use {safeTransferFrom} whenever possible.     * Requirements:     * - `from`, `to` cannot be zero. - `tokenId` token must be owned by `from`. - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.     * Emits a {Transfer} event."
1065 |       }
1066 |     },
1067 |     "title": "ERC-721 Non-Fungible Token Standard, optional enumeration extension"
1068 |   },
1069 |   "userdoc": {
1070 |     "methods": {}
1071 |   }
1072 | }


--------------------------------------------------------------------------------