├── src
    ├── react-app-env.d.ts
    ├── setupTests.ts
    ├── App.test.tsx
    ├── index.css
    ├── reportWebVitals.ts
    ├── index.tsx
    ├── routes
    │   ├── launchIcon.svg
    │   ├── styles.tsx
    │   ├── LandingPage.tsx
    │   └── Send.tsx
    ├── App.css
    ├── App.tsx
    ├── logo.svg
    └── StateContext.tsx
├── .babelrc
├── public
    ├── favicon.ico
    ├── logo192.png
    ├── logo512.png
    ├── robots.txt
    ├── manifest.json
    ├── logo-dark.svg
    ├── logo-light.svg
    └── index.html
├── declarations.d.ts
├── tsconfig.json
├── .gitignore
├── .eslintrc.js
├── README.md
├── package.json
└── webpack.config.js


/src/react-app-env.d.ts:
--------------------------------------------------------------------------------
1 | /// <reference types="react-scripts" />
2 | 


--------------------------------------------------------------------------------
/.babelrc:
--------------------------------------------------------------------------------
1 | {
2 |     "presets": ["@babel/preset-env", "@babel/preset-react"]
3 |   }


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/public/favicon.ico:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/zkemail/oauth-demo-ui/HEAD/public/favicon.ico


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/public/logo192.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/zkemail/oauth-demo-ui/HEAD/public/logo192.png


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/public/logo512.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/zkemail/oauth-demo-ui/HEAD/public/logo512.png


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/public/robots.txt:
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1 | # https://www.robotstxt.org/robotstxt.html
2 | User-agent: *
3 | Disallow:
4 | 


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/declarations.d.ts:
--------------------------------------------------------------------------------
1 | declare module '*.svg' {
2 |     const content: any;
3 |     export default content;
4 |   }
5 |   


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/src/setupTests.ts:
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1 | // jest-dom adds custom jest matchers for asserting on DOM nodes.
2 | // allows you to do things like:
3 | // expect(element).toHaveTextContent(/react/i)
4 | // learn more: https://github.com/testing-library/jest-dom
5 | import '@testing-library/jest-dom';
6 | 


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/src/App.test.tsx:
--------------------------------------------------------------------------------
 1 | import React from 'react';
 2 | import { render, screen } from '@testing-library/react';
 3 | import App from './App';
 4 | 
 5 | test('renders learn react link', () => {
 6 |   render(<App />);
 7 |   const linkElement = screen.getByText(/learn react/i);
 8 |   expect(linkElement).toBeInTheDocument();
 9 | });
10 | 


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/tsconfig.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "compilerOptions": {
 3 |     "target": "ES2020",
 4 |     "module": "commonjs",
 5 |     "strict": true,
 6 |     "jsx": "react",
 7 |     "esModuleInterop": true,
 8 |     "skipLibCheck": true,
 9 |     "forceConsistentCasingInFileNames": true
10 |   },
11 |   "include": [
12 |     "src/**/*", "declarations.d.ts"
13 |   ],
14 | }


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


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/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 | }
 9 | 
10 | code {
11 |   font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
12 |     monospace;
13 | }
14 | 
15 | * {
16 |   box-sizing: border-box;
17 | }


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/src/reportWebVitals.ts:
--------------------------------------------------------------------------------
 1 | import { ReportHandler } from 'web-vitals';
 2 | 
 3 | const reportWebVitals = (onPerfEntry?: ReportHandler) => {
 4 |   if (onPerfEntry && onPerfEntry instanceof Function) {
 5 |     import('web-vitals').then(({ getCLS, getFID, getFCP, getLCP, getTTFB }) => {
 6 |       getCLS(onPerfEntry);
 7 |       getFID(onPerfEntry);
 8 |       getFCP(onPerfEntry);
 9 |       getLCP(onPerfEntry);
10 |       getTTFB(onPerfEntry);
11 |     });
12 |   }
13 | };
14 | 
15 | export default reportWebVitals;
16 | 


--------------------------------------------------------------------------------
/.eslintrc.js:
--------------------------------------------------------------------------------
 1 | module.exports = {
 2 |     env: {
 3 |       browser: true,
 4 |       es2021: true,
 5 |     },
 6 |     extends: [
 7 |       'eslint:recommended',
 8 |       'plugin:react/recommended',
 9 |     ],
10 |     parserOptions: {
11 |       ecmaFeatures: {
12 |         jsx: true,
13 |       },
14 |       ecmaVersion: 12,
15 |       sourceType: 'module',
16 |     },
17 |     plugins: [
18 |       'react',
19 |       'react-hooks',
20 |     ],
21 |     rules: {
22 |       'react/react-in-jsx-scope': 'off',
23 |     },
24 |   };


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/public/manifest.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "short_name": "React App",
 3 |   "name": "Create React App Sample",
 4 |   "icons": [
 5 |     {
 6 |       "src": "favicon.ico",
 7 |       "sizes": "64x64 32x32 24x24 16x16",
 8 |       "type": "image/x-icon"
 9 |     },
10 |     {
11 |       "src": "logo192.png",
12 |       "type": "image/png",
13 |       "sizes": "192x192"
14 |     },
15 |     {
16 |       "src": "logo512.png",
17 |       "type": "image/png",
18 |       "sizes": "512x512"
19 |     }
20 |   ],
21 |   "start_url": ".",
22 |   "display": "standalone",
23 |   "theme_color": "#000000",
24 |   "background_color": "#ffffff"
25 | }
26 | 


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/public/logo-dark.svg:
--------------------------------------------------------------------------------
1 | <svg width="270" height="258" viewBox="0 0 270 258" fill="none" xmlns="http://www.w3.org/2000/svg">
2 |     <path fillRule="evenodd" clipRule="evenodd"
3 |         d="M219.791 53.2V70H268.391V58.2H233.591V56.6L268.191 16.8V0H220.791V11.8H254.391V13.4L219.791 53.2ZM1.99998 46H202V26H1.99998V46ZM67.9688 142.5H269.031V122.5H67.9688V142.5ZM189 242H1.99998V222H189V242ZM0.301147 169V99H13.5011V126.8H15.3011L38.0012 99H54.9012L25.7011 133.5L55.9012 169H38.5012L15.3011 140.6H13.5011V169H0.301147ZM222.914 188V258H268.514V246H236.114V228.7H265.114V216.7H236.114V200H267.914V188H222.914Z"
4 |         fill="white" />
5 | </svg>


--------------------------------------------------------------------------------
/public/logo-light.svg:
--------------------------------------------------------------------------------
1 | <svg width="270" height="258" viewBox="0 0 270 258" fill="none" xmlns="http://www.w3.org/2000/svg">
2 |     <path fillRule="evenodd" clipRule="evenodd"
3 |         d="M219.791 53.2V70H268.391V58.2H233.591V56.6L268.191 16.8V0H220.791V11.8H254.391V13.4L219.791 53.2ZM1.99998 46H202V26H1.99998V46ZM67.9688 142.5H269.031V122.5H67.9688V142.5ZM189 242H1.99998V222H189V242ZM0.301147 169V99H13.5011V126.8H15.3011L38.0012 99H54.9012L25.7011 133.5L55.9012 169H38.5012L15.3011 140.6H13.5011V169H0.301147ZM222.914 188V258H268.514V246H236.114V228.7H265.114V216.7H236.114V200H267.914V188H222.914Z"
4 |         fill="black" />
5 | </svg>


--------------------------------------------------------------------------------
/src/index.tsx:
--------------------------------------------------------------------------------
 1 | import React from 'react';
 2 | import ReactDOM from 'react-dom/client';
 3 | import './index.css';
 4 | import App from './App';
 5 | import reportWebVitals from './reportWebVitals';
 6 | 
 7 | const root = ReactDOM.createRoot(
 8 |   document.getElementById('root') as HTMLElement
 9 | );
10 | root.render(
11 |   <React.StrictMode>
12 |     <App />
13 |   </React.StrictMode>
14 | );
15 | 
16 | // If you want to start measuring performance in your app, pass a function
17 | // to log results (for example: reportWebVitals(console.log))
18 | // or send to an analytics endpoint. Learn more: https://bit.ly/CRA-vitals
19 | reportWebVitals();
20 | 


--------------------------------------------------------------------------------
/src/routes/launchIcon.svg:
--------------------------------------------------------------------------------
1 | <?xml version="1.0" ?><svg height="18px" version="1.1" viewBox="0 0 18 18" width="18px" xmlns="http://www.w3.org/2000/svg" xmlns:sketch="http://www.bohemiancoding.com/sketch/ns" xmlns:xlink="http://www.w3.org/1999/xlink"><title/><desc/><defs/><g fill="none" fill-rule="evenodd" id="Page-1" stroke="none" stroke-width="1"><g fill="#000000" id="Core" transform="translate(-339.000000, -297.000000)"><g id="launch" transform="translate(339.000000, 297.000000)"><path d="M16,16 L2,16 L2,2 L9,2 L9,0 L2,0 C0.9,0 0,0.9 0,2 L0,16 C0,17.1 0.9,18 2,18 L16,18 C17.1,18 18,17.1 18,16 L18,9 L16,9 L16,16 L16,16 Z M11,0 L11,2 L14.6,2 L4.8,11.8 L6.2,13.2 L16,3.4 L16,7 L18,7 L18,0 L11,0 L11,0 Z" id="Shape"/></g></g></g></svg>


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/README.md:
--------------------------------------------------------------------------------
 1 | ## Oauth Email Wallet Demo
 2 | 
 3 | Authorize scoped access to your email wallet account controlled by ZK Email proofs, via just 3 lines of code in a frontend SDK. This demo site shows how to integrate it with a live deployed example.
 4 | 
 5 | ## Installation
 6 | ```
 7 | npm install @zk-email/oauth-sdk
 8 | ```
 9 | 
10 | ## Usage
11 | 
12 | To learn more about how to integrate, check out [our OAuth docs](https://docs.zk.email/login-with-zk-email-oauth-api).
13 | 
14 | ## Link ts-sdk
15 | 
16 | ```
17 | git clone git@github.com:zkemail/email-wallet.git
18 | cd email-wallet
19 | git checkout feat/oauth-mvp
20 | cd email-wallet/packages/ts-sdk
21 | npm link
22 | 
23 | cd {THIS_REPO}
24 | npm link @zk-email/ts-sdk
25 | ```
26 | 


--------------------------------------------------------------------------------
/src/App.css:
--------------------------------------------------------------------------------
 1 | .App {
 2 |   text-align: center;
 3 | }
 4 | 
 5 | .App-logo {
 6 |   height: 40vmin;
 7 |   pointer-events: none;
 8 | }
 9 | 
10 | @media (prefers-reduced-motion: no-preference) {
11 |   .App-logo {
12 |     animation: App-logo-spin infinite 20s linear;
13 |   }
14 | }
15 | 
16 | .App-header {
17 |   background-color: #282c34;
18 |   min-height: 100vh;
19 |   display: flex;
20 |   flex-direction: column;
21 |   align-items: center;
22 |   justify-content: center;
23 |   font-size: calc(10px + 2vmin);
24 |   color: white;
25 | }
26 | 
27 | .App-link {
28 |   color: #61dafb;
29 | }
30 | 
31 | @keyframes App-logo-spin {
32 |   from {
33 |     transform: rotate(0deg);
34 |   }
35 |   to {
36 |     transform: rotate(360deg);
37 |   }
38 | }
39 | 


--------------------------------------------------------------------------------
/src/routes/styles.tsx:
--------------------------------------------------------------------------------
 1 | import { CSSProperties } from "react";
 2 | 
 3 | export const styles: { [key: string]: CSSProperties } = {
 4 |     input: {
 5 |       margin: "0",
 6 |       padding: "0.625rem",
 7 |       fontSize: "1rem",
 8 |       borderRadius: "4px",
 9 |       border: "1px solid #ccc",
10 |       width: "100%",
11 |       height: "max-content",
12 |     },
13 |     button: {
14 |       border: "none",
15 |       color: 'black',
16 |       borderRadius: "4px",
17 |       padding: "0.75rem",
18 |       fontSize: "1rem",
19 |       fontWeight: 700,
20 |       cursor: "pointer",
21 |     },
22 |     transaction: {
23 |       border: "1px solid #ccc",
24 |       padding: "1rem",
25 |       cursor: "pointer",
26 |       borderRadius: 4,
27 |     },
28 |   };


--------------------------------------------------------------------------------
/src/App.tsx:
--------------------------------------------------------------------------------
 1 | // src/App.tsx
 2 | import React from "react";
 3 | // import WaitingPage from './routes/WaitingPage';
 4 | import LandingPage from "./routes/LandingPage";
 5 | import SendPage from "./routes/Send";
 6 | import { HashRouter, Routes, Route } from "react-router-dom";
 7 | import { StateProvider } from "./StateContext";
 8 | import { CssVarsProvider, extendTheme } from "@mui/joy/styles";
 9 | 
10 | const theme = extendTheme({
11 |   colorSchemes: {
12 |     light: {
13 |       palette: {
14 |         primary: {
15 |           50: '#FACC15',
16 |           100: '#FACC1500',
17 |           200: '#FACC15',
18 |           300: '#FACC15',
19 |           400: '#FACC15',
20 |           500: '#FACC15',
21 |           600: '#FACC15',
22 |           700: '#FACC15',
23 |           800: '#FACC15',
24 |           900: '#FACC15',
25 |         },
26 |       },
27 |     },
28 |   },
29 | 
30 | });
31 | 
32 | const App: React.FC = () => {
33 |   return (
34 |     <div className="App">
35 |       <CssVarsProvider theme={theme}>
36 |         <StateProvider>
37 |           <HashRouter>
38 |             <Routes>
39 |               <Route path="/" element={<LandingPage />} />
40 |               <Route path="/send" element={<SendPage />} />
41 |             </Routes>
42 |           </HashRouter>
43 |         </StateProvider>
44 |       </CssVarsProvider>
45 |     </div>
46 |   );
47 | };
48 | 
49 | export default App;
50 | 


--------------------------------------------------------------------------------
/public/index.html:
--------------------------------------------------------------------------------
 1 | <!DOCTYPE html>
 2 | <html lang="en">
 3 | 
 4 | <head>
 5 |   <meta charset="utf-8" />
 6 |   <!-- <link rel="icon" href="logo.svg" /> -->
 7 |   <link href="logo-light.svg" rel="icon" media="(prefers-color-scheme: light)">
 8 |   <link href="logo-dark.svg" rel="icon" media="(prefers-color-scheme: dark)">
 9 | 
10 |   <meta name="viewport" content="width=device-width, initial-scale=1" />
11 |   <meta name="theme-color" content="#000000" />
12 |   <meta name="description" content="Web site created using create-react-app" />
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="/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>Email Oauth Demo</title>
28 | </head>
29 | 
30 | <body>
31 |   <noscript>You need to enable JavaScript to run this app.</noscript>
32 |   <div id="root"></div>
33 |   <!--
34 |       This HTML file is a template.
35 |       If you open it directly in the browser, you will see an empty page.
36 | 
37 |       You can add webfonts, meta tags, or analytics to this file.
38 |       The build step will place the bundled scripts into the <body> tag.
39 | 
40 |       To begin the development, run `npm start` or `yarn start`.
41 |       To create a production bundle, use `npm run build` or `yarn build`.
42 |     -->
43 | </body>
44 | 
45 | </html>


--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "oauth-demo-ui",
 3 |   "version": "0.1.0",
 4 |   "private": true,
 5 |   "dependencies": {
 6 |     "@emotion/react": "^11.11.4",
 7 |     "@emotion/styled": "^11.11.5",
 8 |     "@mui/joy": "^5.0.0-beta.47",
 9 |     "@testing-library/jest-dom": "^5.17.0",
10 |     "@testing-library/react": "^13.4.0",
11 |     "@testing-library/user-event": "^13.5.0",
12 |     "@types/jest": "^27.5.2",
13 |     "@types/node": "^16.18.101",
14 |     "@types/react": "^18.3.3",
15 |     "@types/react-dom": "^18.3.0",
16 |     "@zk-email/oauth-sdk": "^0.1.3",
17 |     "dotenv": "^16.4.5",
18 |     "file-loader": "^6.2.0",
19 |     "react": "^18.3.1",
20 |     "react-dom": "^18.3.1",
21 |     "react-router-dom": "^6.24.1",
22 |     "reverse-mirage": "^1.1.0",
23 |     "svg-inline-loader": "^0.8.0",
24 |     "typescript": "^5.5.3",
25 |     "viem": "^2.17.2",
26 |     "wagmi": "^2.10.9",
27 |     "web-vitals": "^2.1.4"
28 |   },
29 |   "scripts": {
30 |     "start": "webpack serve --mode development",
31 |     "build": "webpack --mode production",
32 |     "test": "echo \"Error: no test specified\" && exit 1"
33 |   },
34 |   "eslintConfig": {
35 |     "extends": [
36 |       "react-app",
37 |       "react-app/jest"
38 |     ]
39 |   },
40 |   "browserslist": {
41 |     "production": [
42 |       ">0.2%",
43 |       "not dead",
44 |       "not op_mini all"
45 |     ],
46 |     "development": [
47 |       "last 1 chrome version",
48 |       "last 1 firefox version",
49 |       "last 1 safari version"
50 |     ]
51 |   },
52 |   "devDependencies": {
53 |     "@babel/core": "^7.24.7",
54 |     "@babel/preset-env": "^7.24.7",
55 |     "@babel/preset-react": "^7.24.7",
56 |     "babel-loader": "^9.1.3",
57 |     "clean-webpack-plugin": "^4.0.0",
58 |     "css-loader": "^7.1.2",
59 |     "eslint": "^8.57.0",
60 |     "eslint-plugin-react": "^7.34.3",
61 |     "eslint-plugin-react-hooks": "^4.6.2",
62 |     "html-webpack-plugin": "^5.6.0",
63 |     "style-loader": "^4.0.0",
64 |     "ts-loader": "^9.5.1",
65 |     "webpack": "^5.92.1",
66 |     "webpack-cli": "^5.1.4",
67 |     "webpack-dev-server": "^5.0.4"
68 |   }
69 | }
70 | 


--------------------------------------------------------------------------------
/webpack.config.js:
--------------------------------------------------------------------------------
 1 | const path = require("path");
 2 | const HtmlWebpackPlugin = require("html-webpack-plugin");
 3 | const { CleanWebpackPlugin } = require("clean-webpack-plugin");
 4 | const { DefinePlugin } = require("webpack");
 5 | const dotenv = require("dotenv");
 6 | dotenv.config();
 7 | 
 8 | module.exports = {
 9 |   entry: "./src/index.tsx",
10 |   output: {
11 |     filename: "bundle.js",
12 |     path: path.resolve(__dirname, "dist"),
13 |     publicPath: "/",
14 |   },
15 |   mode: "development",
16 |   devServer: {
17 |     static: {
18 |       directory: path.join(__dirname, "public"),
19 |     },
20 |     historyApiFallback: true,
21 |     // proxy: {
22 |     //   '/api': {
23 |     //     target: process.env.REACT_APP_RELAYER_HOST,
24 |     //     changeOrigin: true,
25 |     //     pathRewrite: {
26 |     //       '^/api': '/api',
27 |     //     },
28 |     //     // onProxyReq: (proxyReq, req, res) => {
29 |     //     //   proxyReq.setHeader('Origin', 'https://frontend.com');
30 |     //     // },
31 |     //   }
32 |     // }
33 |     // before: function (app, server, compiler) {
34 |     //   app.use((req, res, next) => {
35 |     //     res.setHeader("Cross-Origin-Opener-Policy", "same-origin");
36 |     //     res.setHeader("Cross-Origin-Embedder-Policy", "require-corp");
37 |     //     res.setHeader("Access-Control-Allow-Origin", "*");
38 |     //     next();
39 |     //   });
40 |     // },
41 |   },
42 |   module: {
43 |     rules: [
44 |       {
45 |         test: /\.(ts|tsx)$/, // Add TypeScript support
46 |         exclude: /node_modules/,
47 |         use: "ts-loader", // Use ts-loader for TypeScript files
48 |       },
49 |       {
50 |         test: /\.(js|jsx)$/,
51 |         exclude: /node_modules/,
52 |         use: {
53 |           loader: "babel-loader",
54 |         },
55 |       },
56 |       {
57 |         test: /\.css$/,
58 |         use: ["style-loader", "css-loader"],
59 |       },
60 |       {
61 |         test: /\.svg$/,
62 |         use: "file-loader", // Use url-loader for SVG files
63 |       },
64 |     ],
65 |   },
66 |   resolve: {
67 |     extensions: [".ts", ".tsx", ".js", ".jsx"], // Add .ts and .tsx extensions
68 |   },
69 |   plugins: [
70 |     new CleanWebpackPlugin(),
71 |     new HtmlWebpackPlugin({
72 |       template: "./public/index.html",
73 |     }),
74 |     new DefinePlugin({
75 |       "process.env": JSON.stringify(process.env),
76 |     }),
77 |   ],
78 | };
79 | 


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/src/logo.svg:
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/src/StateContext.tsx:
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  1 | import React, { createContext, useContext, useState, ReactNode, useEffect } from 'react';
  2 | import { OauthClient } from "@zk-email/oauth-sdk";
  3 | import { Address, GetContractReturnType, PrivateKeyAccount, PublicClient, createPublicClient, WalletClient, getContract, encodePacked, http, } from 'viem'
  4 | import { baseSepolia, mainnet, base } from "viem/chains";
  5 | 
  6 | type StateContextType = {
  7 |     userEmailAddr: string,
  8 |     setUserEmailAddr: (userEmailAddr: string) => void,
  9 |     username: string,
 10 |     setUsername: (username: string) => void,
 11 |     oauthClient: OauthClient<typeof baseSepolia>,
 12 |     setOauthClient: (oauthClient: OauthClient<typeof baseSepolia>) => void,
 13 |     requestId: number | null,
 14 |     setRequestId: (requestId: number | null) => void,
 15 |     pageState: PageState,
 16 |     setPageState: (pageState: PageState) => void,
 17 | };
 18 | 
 19 | export type OauthClientCache = {
 20 |     userEmailAddr: string,
 21 |     username: string,
 22 |     userWalletAddr: Address,
 23 |     ephePrivateKey: `0x${string}`,
 24 |     epheAddrNonce: string,
 25 | }
 26 | 
 27 | export enum PageState {
 28 |     landing = 0,
 29 |     waiting = 1,
 30 |     send = 2,
 31 | 
 32 | }
 33 | 
 34 | const StateContext = createContext<StateContextType | undefined>(undefined);
 35 | export const StateProvider: React.FC<{ children: ReactNode }> = ({ children }) => {
 36 |     const coreAddress = process.env.REACT_APP_CORE_ADDRESS || '';
 37 |     const oauthAddress = process.env.REACT_APP_OAUTH_ADDRESS || '';
 38 |     const relayerHost = process.env.REACT_APP_RELAYER_HOST || '';
 39 |     const publicClient = createPublicClient({
 40 |         chain: baseSepolia,
 41 |         transport: http("https://sepolia.base.org"),
 42 |     });
 43 |     const cachedOauthClientStr = localStorage.getItem('oauthClient');
 44 |     const cachedOauthClient: OauthClientCache | null = cachedOauthClientStr ? JSON.parse(cachedOauthClientStr) as OauthClientCache : null;
 45 |     console.log(cachedOauthClient);
 46 |     const [userEmailAddr, setUserEmailAddr] = useState<string>(cachedOauthClient !== null ? cachedOauthClient.userEmailAddr : '');
 47 |     const [username, setUsername] = useState<string>(cachedOauthClient !== null ? cachedOauthClient.username : '');
 48 |     // const [isFilled, setIsFilled] = useState<boolean>(false);
 49 |     const oauthClientInit = cachedOauthClient !== null ? new OauthClient(publicClient, coreAddress as Address, oauthAddress as Address, relayerHost, cachedOauthClient.userEmailAddr, cachedOauthClient.userWalletAddr, cachedOauthClient.ephePrivateKey, cachedOauthClient.epheAddrNonce) : new OauthClient(publicClient, coreAddress as Address, oauthAddress as Address, relayerHost);
 50 |     const [oauthClient, setOauthClient] = useState<OauthClient<typeof baseSepolia>>(oauthClientInit);
 51 |     const [requestId, setRequestId] = useState<number | null>(null);
 52 |     // const [isActivated, setIsActivated] = useState<boolean>(cachedOauthClient !== null);
 53 |     const [pageState, setPageState] = useState<PageState>(cachedOauthClient !== null ? PageState.send : PageState.landing);
 54 | 
 55 |     // useEffect(() => {
 56 |     //     const setup = async () => {
 57 |     //         if (!isFilled) {
 58 |     //             return;
 59 |     //         }
 60 |     //         const requestId = await oauthClient?.setup(userEmailAddr, username, null, [[10, "TEST"]]);
 61 |     //         setOauthClient(oauthClient);
 62 |     //         setRequestId(requestId);
 63 |     //         setIsFilled(false);
 64 |     //     };
 65 |     //     setup();
 66 |     // }, [isFilled, userEmailAddr, username]);
 67 | 
 68 | 
 69 |     // useEffect(() => {
 70 |     //     const waiting = async () => {
 71 |     //         if (requestId !== null) {
 72 |     //             console.log(requestId);
 73 |     //             await oauthClient?.waitEpheAddrActivated(requestId);
 74 |     //             setOauthClient(oauthClient);
 75 |     //             setRequestId(null);
 76 |     //             setPageState(PageState.send);
 77 |     //             const newCache: OauthClientCache = {
 78 |     //                 userEmailAddr,
 79 |     //                 username,
 80 |     //                 userWalletAddr: oauthClient.getWalletAddress() as Address,
 81 |     //                 ephePrivateKey: oauthClient.getEphePrivateKey(),
 82 |     //                 epheAddrNonce: oauthClient.getEpheAddrNonce() as string,
 83 |     //             };
 84 |     //             localStorage.setItem('oauthClient', JSON.stringify(newCache));
 85 |     //         }
 86 |     //     }
 87 |     //     waiting();
 88 |     // }, [requestId]);
 89 | 
 90 |     return (
 91 |         <StateContext.Provider value={{ userEmailAddr, setUserEmailAddr, username, setUsername, oauthClient, setOauthClient, requestId, setRequestId, pageState, setPageState }}>
 92 |             {children}
 93 |         </StateContext.Provider>
 94 |     );
 95 | };
 96 | 
 97 | export const useAppState = () => {
 98 |     const context = useContext(StateContext);
 99 |     if (!context) {
100 |         throw new Error('useAppState must be used within a StateProvider');
101 |     }
102 |     return context;
103 | };


--------------------------------------------------------------------------------
/src/routes/LandingPage.tsx:
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  1 | // src/LandingPage.tsx
  2 | import React, { useState, CSSProperties, useEffect } from "react";
  3 | import { Outlet, Link, useNavigate } from "react-router-dom";
  4 | import { useAppState, PageState } from "../StateContext";
  5 | import { Button, Grid, Tab, TabList, Tabs, Typography } from "@mui/joy";
  6 | import { styles } from "./styles";
  7 | 
  8 | const emailRegex: RegExp = /^[A-Za-z0-9!#$%&'*+=?\\-\\^_`{|}~./@]+@[A-Za-z0-9.\\-]+$/;
  9 | 
 10 | const LandingPage: React.FC = () => {
 11 |   // const [email, setEmail] = useState<string>('');
 12 |   // const [username, setUsername] = useState<string>('');
 13 |   const [selectedOption, setSelectedOption] = useState<
 14 |     "signup" | "signin" | null
 15 |   >(`signup`);
 16 |   const [isFilled, setIsFilled] = useState<boolean>(false);
 17 |   const {
 18 |     userEmailAddr,
 19 |     setUserEmailAddr,
 20 |     username,
 21 |     setUsername,
 22 |     pageState,
 23 |     setPageState,
 24 |     oauthClient,
 25 |     setOauthClient,
 26 |     requestId,
 27 |     setRequestId,
 28 |   } = useAppState();
 29 |   const navigate = useNavigate();
 30 | 
 31 |   const handleEmailChange = (e: React.ChangeEvent<HTMLInputElement>) => {
 32 |     setUserEmailAddr(e.target.value);
 33 |   };
 34 | 
 35 |   const handleUsernameChange = (e: React.ChangeEvent<HTMLInputElement>) => {
 36 |     setUsername(e.target.value);
 37 |   };
 38 | 
 39 |   const handleOptionClick = (option: "signup" | "signin") => {
 40 |     setSelectedOption(option);
 41 |   };
 42 | 
 43 |   useEffect(() => {
 44 |     setSelectedOption("signup");
 45 |     setUserEmailAddr("");
 46 |     setUsername("");
 47 |   }, []);
 48 | 
 49 |   const handleNextClick = () => {
 50 |     setIsFilled(true);
 51 |     setPageState(PageState.waiting);
 52 |     // navigate('/send');
 53 |     // const requestId = await oauthClient?.setup(email, username, null, null);
 54 |     // if (requestId != null) {
 55 |     //   setRequestId(requestId);
 56 |     // }
 57 |   };
 58 | 
 59 |   useEffect(() => {
 60 |     const setup = async () => {
 61 |       if (!isFilled) {
 62 |         return;
 63 |       }
 64 |       console.log(userEmailAddr, username, null, [[10, "TEST"]]);
 65 |       const requestId = await oauthClient?.setup(
 66 |         userEmailAddr,
 67 |         username,
 68 |         null,
 69 |         [[10, "TEST"]]
 70 |       );
 71 |       setOauthClient(oauthClient);
 72 |       setRequestId(requestId);
 73 |       setIsFilled(false);
 74 |     };
 75 |     setup();
 76 |   }, [isFilled, userEmailAddr, username]);
 77 | 
 78 |   useEffect(() => {
 79 |     if (pageState === PageState.waiting || pageState === PageState.send) {
 80 |       navigate("/send");
 81 |     }
 82 |   }, [pageState]);
 83 | 
 84 |   const isFormValid = () => {
 85 |     if (selectedOption === "signup") {
 86 |       return userEmailAddr !== "" && emailRegex.test(userEmailAddr) && username !== "" && !emailRegex.test(username);
 87 |     } else {
 88 |       return userEmailAddr !== "" && emailRegex.test(userEmailAddr);
 89 |     }
 90 |   };
 91 | 
 92 |   // const styles: { [key: string]: CSSProperties } = {
 93 |   //   container: {
 94 |   //     display: 'flex',
 95 |   //     flexDirection: 'column',
 96 |   //     alignItems: 'center',
 97 |   //     justifyContent: 'center',
 98 |   //     height: '100vh',
 99 |   //     backgroundColor: '#f0f0f0',
100 |   //   },
101 |   //   title: {
102 |   //     marginBottom: '20px',
103 |   //   },
104 |   //   input: {
105 |   //     padding: '10px',
106 |   //     fontSize: '16px',
107 |   //     marginBottom: '10px',
108 |   //     borderRadius: '5px',
109 |   //     border: '1px solid #ccc',
110 |   //   },
111 |   //   button: {
112 |   //     padding: '10px 20px',
113 |   //     fontSize: '16px',
114 |   //     borderRadius: '5px',
115 |   //     border: 'none',
116 |   //     backgroundColor: '#007bff',
117 |   //     color: '#fff',
118 |   //     cursor: 'pointer',
119 |   //     margin: '5px',
120 | 
121 |   //   },
122 |   //   inactiveButton: {
123 |   //     backgroundColor: '#cccccc',
124 |   //   },
125 |   //   disabledButton: {
126 |   //     backgroundColor: '#cccccc',
127 |   //     cursor: 'not-allowed',
128 |   //   },
129 |   //   link: {
130 |   //     color: '#fff',
131 |   //     textDecoration: 'none',
132 |   //   },
133 |   // };
134 | 
135 |   return (
136 |     <Grid
137 |       container
138 |       style={{ background: "#F3F4F6", height: "100vh", width: "100vw" }}
139 |       justifyContent={"center"}
140 |       alignItems={"center"}
141 |     >
142 |       <Grid
143 |         container
144 |         spacing={4}
145 |         style={{
146 |           width: "900px",
147 |           maxWidth: "90vw",
148 |           height: "500px",
149 |           overflowY: "auto",
150 |           maxHeight: "50vh",
151 |           border: "1px solid #E4E4E7",
152 |           borderRadius: 8,
153 |           background: "white",
154 |           padding: "1rem",
155 |         }}
156 |       >
157 |         <Grid xs={12}>
158 |           <Typography textAlign={"center"} level="h2">
159 |             Email Oauth Demo
160 |           </Typography>
161 |         </Grid>
162 |         <Grid container xs={12}>
163 |           <Grid xs={12}>
164 |             <Tabs
165 |               defaultValue={"signup"}
166 |               onChange={(event, value) =>
167 |                 setSelectedOption(value as "signup" | "signin" | null)
168 |               }
169 |             >
170 |               <TabList tabFlex={1}>
171 |                 <Tab value="signup">Sign-up</Tab>
172 |                 <Tab value="signin">Sign-in</Tab>
173 |               </TabList>
174 |             </Tabs>
175 |           </Grid>
176 |           {/* <Grid xs={6}>
177 |             <Button
178 |               style={styles.button}
179 |               fullWidth
180 |               onClick={() => handleOptionClick("signup")}
181 |               disabled={selectedOption === "signup"}
182 |             >
183 |               Sign-up
184 |             </Button>
185 |           </Grid>
186 |           <Grid xs={6}>
187 |             <Button
188 |               style={styles.button}
189 |               fullWidth
190 |               onClick={() => handleOptionClick("signin")}
191 |               disabled={selectedOption === "signin"}
192 |             >
193 |               Sign-in
194 |             </Button>
195 |           </Grid> */}
196 |         </Grid>
197 |         <Grid container spacing={0} xs={12}>
198 |           <Grid xs={12}>
199 |             <input
200 |               type="email"
201 |               placeholder="Enter your email address"
202 |               value={userEmailAddr}
203 |               onChange={handleEmailChange}
204 |               style={styles.input}
205 |             />
206 |           </Grid>
207 |           <Grid xs={12}>
208 |             {selectedOption === "signup" && (
209 |               <input
210 |                 type="text"
211 |                 placeholder="Enter your username"
212 |                 value={username}
213 |                 onChange={handleUsernameChange}
214 |                 style={styles.input}
215 |               />
216 |             )}
217 |           </Grid>
218 |         </Grid>
219 |         <Grid xs={12}>
220 |           <Button
221 |             onClick={handleNextClick}
222 |             style={styles.button}
223 |             fullWidth
224 |             disabled={!isFormValid()}
225 |           >
226 |             Next
227 |           </Button>
228 |         </Grid>
229 |       </Grid>
230 |     </Grid>
231 |   );
232 | };
233 | 
234 | export default LandingPage;
235 | 


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/src/routes/Send.tsx:
--------------------------------------------------------------------------------
  1 | import React, { useEffect, useState } from "react";
  2 | import { OauthClientCache, PageState, useAppState } from "../StateContext";
  3 | import { Address, encodeFunctionData, getAddress, createPublicClient, http } from "viem";
  4 | import { erc20Abi } from "viem";
  5 | import CircularProgress from "@mui/joy/CircularProgress";
  6 | import List from "@mui/joy/List";
  7 | import ListItem from "@mui/joy/ListItem";
  8 | import { Button, Grid, Typography } from "@mui/joy";
  9 | import { styles } from "./styles";
 10 | import { useNavigate } from "react-router-dom";
 11 | import { OauthClient } from "@zk-email/oauth-sdk";
 12 | import { baseSepolia, mainnet, base } from "viem/chains";
 13 | import LaunchIcon from './launchIcon.svg'
 14 | 
 15 | const SendPage: React.FC = () => {
 16 |     const navigate = useNavigate();
 17 | 
 18 |     const {
 19 |         oauthClient,
 20 |         setOauthClient,
 21 |         pageState,
 22 |         setPageState,
 23 |         requestId,
 24 |         setRequestId,
 25 |         userEmailAddr,
 26 |         setUserEmailAddr,
 27 |         username,
 28 |         setUsername,
 29 |     } = useAppState();
 30 |     const [amountStr, setAmountStr] = useState<string>("");
 31 |     const [amount, setAmount] = useState<bigint>(0n);
 32 |     const [token, setToken] = useState<string>("TEST");
 33 |     const [to, setTo] = useState<string>("");
 34 |     const decimals = 18;
 35 |     const baseAmount = 10n ** BigInt(decimals);
 36 |     const [balanceOfTest, setBalanceOfTest] = useState<bigint>(0n);
 37 |     const [allowanceOfTest, setAllowanceOfTest] = useState<bigint>(
 38 |         0n
 39 |     );
 40 |     const [loading, setLoading] = useState<boolean>(false);
 41 |     // const [isExecuting, setIsExecuting] = useState<boolean>(false);
 42 |     const [txInfos, setTxInfos] = useState<[string, string, string][]>([]);
 43 | 
 44 |     const testTokenAddr = process.env.REACT_APP_TEST_TOKEN as Address | null;
 45 |     if (!testTokenAddr) {
 46 |         throw new Error("REACT_APP_TEST_TOKEN is not set");
 47 |     }
 48 | 
 49 |     const handleAmountChange = (e: React.ChangeEvent<HTMLInputElement>) => {
 50 |         setAmountStr(e.target.value);
 51 |         console.log("amountStr:", amountStr);
 52 |         setAmount(_amountStrToBigint(e.target.value, decimals));
 53 |     };
 54 | 
 55 |     const handleTokenChange = (e: React.ChangeEvent<HTMLSelectElement>) => {
 56 |         setToken(e.target.value);
 57 |     };
 58 | 
 59 |     const handleToChange = (e: React.ChangeEvent<HTMLInputElement>) => {
 60 |         setTo(e.target.value);
 61 |     };
 62 | 
 63 |     const handleSendClick = async () => {
 64 |         setLoading(true);
 65 |         console.log("Sending", { amount, token, to });
 66 |         let toAddress;
 67 |         try {
 68 |             toAddress = getAddress(to);
 69 |         } catch (e) {
 70 |             console.log("Incorrect to address. Please check the value and retry");
 71 |             return;
 72 |         }
 73 |         const data = encodeFunctionData({
 74 |             abi: erc20Abi,
 75 |             functionName: "transfer",
 76 |             args: [toAddress as Address, amount],
 77 |         });
 78 |         const txHash = await oauthClient?.oauthExecuteTx(
 79 |             testTokenAddr,
 80 |             data,
 81 |             0n,
 82 |             amount
 83 |         );
 84 |         console.log("txHash:", txHash);
 85 |         setTxInfos([...txInfos, [txHash, amountStr, toAddress]]);
 86 |         const newBalance = balanceOfTest - amount;
 87 |         setBalanceOfTest(newBalance);
 88 |         const newAllowance = allowanceOfTest - amount;
 89 |         setAllowanceOfTest(newAllowance);
 90 |         setLoading(false);
 91 |     };
 92 | 
 93 |     useEffect(() => {
 94 |         const setupBalances = async () => {
 95 |             if (!oauthClient?.userWallet?.address) {
 96 |                 return;
 97 |             }
 98 |             if (pageState !== PageState.send) {
 99 |                 return;
100 |             }
101 |             const balance = await oauthClient?.publicClient.readContract({
102 |                 address: testTokenAddr!,
103 |                 abi: erc20Abi,
104 |                 functionName: "balanceOf",
105 |                 args: [oauthClient?.userWallet?.address],
106 |             });
107 |             setBalanceOfTest(balance);
108 |             const allowance = await oauthClient.getTokenAllowance(testTokenAddr);
109 |             setAllowanceOfTest(allowance);
110 |         };
111 |         setupBalances();
112 |     }, [pageState]);
113 | 
114 |     useEffect(() => {
115 |         const waiting = async () => {
116 |             if (requestId === null) {
117 |                 console.log("request id is null");
118 |                 return;
119 |             }
120 |             console.log(requestId);
121 |             await oauthClient?.waitEpheAddrActivated(requestId!);
122 |             setOauthClient(oauthClient);
123 |             setRequestId(null);
124 |             setPageState(PageState.send);
125 |             const newCache: OauthClientCache = {
126 |                 userEmailAddr,
127 |                 username,
128 |                 userWalletAddr: oauthClient.getWalletAddress() as Address,
129 |                 ephePrivateKey: oauthClient.getEphePrivateKey(),
130 |                 epheAddrNonce: oauthClient.getEpheAddrNonce() as string,
131 |             };
132 |             console.log(newCache);
133 |             localStorage.setItem("oauthClient", JSON.stringify(newCache));
134 |         };
135 |         waiting();
136 |     }, [requestId]);
137 | 
138 |     const handleLogout = () => {
139 |         localStorage.removeItem("oauthClient");
140 |         setUserEmailAddr('');
141 |         setUsername('');
142 |         const coreAddress = process.env.REACT_APP_CORE_ADDRESS || '';
143 |         const oauthAddress = process.env.REACT_APP_OAUTH_ADDRESS || '';
144 |         const relayerHost = process.env.REACT_APP_RELAYER_HOST || '';
145 |         const publicClient = createPublicClient({
146 |             chain: baseSepolia,
147 |             transport: http("https://sepolia.base.org"),
148 |         });
149 |         setOauthClient(new OauthClient(publicClient, coreAddress as Address, oauthAddress as Address, relayerHost));
150 |         setRequestId(null);
151 |         setPageState(PageState.landing);
152 |         navigate("/");
153 |     };
154 | 
155 |     if (pageState !== PageState.send) {
156 |         return (
157 |             <div
158 |                 style={{
159 |                     display: "flex",
160 |                     flexDirection: "column",
161 |                     alignItems: "center",
162 |                     justifyContent: "center",
163 |                     position: "fixed",
164 |                     top: "0",
165 |                     right: "0",
166 |                     bottom: "0",
167 |                     left: "0",
168 |                 }}
169 |             >
170 |                 <CircularProgress size="lg" style={{ stroke: "#FACC15" }} />
171 |                 <p>Loading until your sign-up/sign-in is completed.</p>
172 |             </div>
173 |         );
174 |     }
175 | 
176 |     return (
177 |         <Grid
178 |             container
179 |             style={{ background: "#F3F4F6", height: "100vh", width: "100vw" }}
180 |             justifyContent={"center"}
181 |             alignItems={"center"}
182 |         >
183 |             <Grid
184 |                 xs={12}
185 |                 style={{
186 |                     position: "absolute",
187 |                     top: 20,
188 |                     right: 20,
189 |                     width: "100vw",
190 |                     textAlign: "end",
191 |                 }}
192 |             >
193 |                 <Button onClick={() => handleLogout()}>Logout</Button>
194 |             </Grid>
195 |             <Grid
196 |                 container
197 |                 spacing={4}
198 |                 style={{
199 |                     width: "900px",
200 |                     maxWidth: "90vw",
201 |                     height: "500px",
202 |                     overflowY: "auto",
203 |                     maxHeight: "50vh",
204 |                     border: "1px solid #E4E4E7",
205 |                     borderRadius: 8,
206 |                     background: "white",
207 |                     padding: "1rem",
208 |                 }}
209 |             >
210 |                 <Grid container spacing={0}>
211 |                     <Grid xs={12}>
212 |                         <Typography level="h4"> Wallet Information</Typography>
213 |                     </Grid>
214 |                     <Grid xs={12}>
215 |                         <Typography style={{ color: "#6B7280" }} level="body-md">
216 |                             Wallet address:{" "}
217 |                             {`${oauthClient?.userWallet?.address}` ?? "Not available"}
218 |                         </Typography>
219 |                     </Grid>
220 |                     <Grid xs={12}>
221 |                         <Typography style={{ color: "#6B7280" }} level="body-md">
222 |                             Balance: {_bigIntToAmountStr(balanceOfTest, decimals)} TEST
223 |                         </Typography>
224 |                     </Grid>
225 |                     <Grid xs={12}>
226 |                         <Typography style={{ color: "#6B7280" }} level="body-md">
227 |                             Remaining Allowance:{" "}
228 |                             {_bigIntToAmountStr(allowanceOfTest, decimals)} TEST
229 |                         </Typography>
230 |                     </Grid>
231 |                 </Grid>
232 |                 <Grid xs={12} container spacing={2}>
233 |                     <Grid xs={12}>
234 |                         <input
235 |                             type="text"
236 |                             placeholder="Enter recipient address"
237 |                             value={to}
238 |                             style={styles.input}
239 |                             onChange={handleToChange}
240 |                         />
241 |                     </Grid>
242 |                     <Grid xs={6}>
243 |                         <input
244 |                             style={styles.input}
245 |                             type="number"
246 |                             placeholder="Enter amount"
247 |                             value={amountStr}
248 |                             onChange={handleAmountChange}
249 |                         />
250 |                     </Grid>
251 |                     <Grid xs={6}>
252 |                         <select
253 |                             style={styles.input}
254 |                             value={token}
255 |                             onChange={handleTokenChange}
256 |                         >
257 |                             <option value="TEST">TEST</option>
258 |                         </select>
259 |                     </Grid>
260 |                     <Grid xs={12}>
261 |                         <Button
262 |                             loading={loading}
263 |                             fullWidth
264 |                             onClick={handleSendClick}
265 |                             style={styles.button}
266 |                         >
267 |                             Send
268 |                         </Button>
269 |                     </Grid>
270 |                 </Grid>
271 |                 {txInfos.length ? (
272 |                     <Grid container xs={12} spacing={0}>
273 |                         <Grid xs={12}>
274 |                             <Typography level="h4">Executed Transactions:</Typography>
275 |                         </Grid>
276 | 
277 |                         <Grid xs={12} container spacing={0}>
278 |                             <List>
279 |                                 {txInfos.map(([txHash, amount, to], index) => (
280 |                                     <Grid key={txHash} xs={12}>
281 |                                         <a
282 |                                             style={{ textDecoration: "none" }}
283 |                                             target="_blank"
284 |                                             href={`https://base-sepolia.blockscout.com/tx/${txHash}`}
285 |                                         >
286 |                                             <ListItem key={index}>
287 |                                                 <Grid
288 |                                                     container
289 |                                                     style={styles.transaction}
290 |                                                     justifyContent={"space-between"}
291 |                                                     xs={12}
292 |                                                 >
293 |                                                     Sent {amount} "TEST" to {to}
294 |                                                     <img src={LaunchIcon} />
295 |                                                 </Grid>
296 |                                             </ListItem>
297 |                                         </a>
298 |                                     </Grid>
299 |                                 ))}
300 |                             </List>
301 |                         </Grid>
302 |                     </Grid>
303 |                 ) : null}
304 |             </Grid>
305 |         </Grid>
306 |     );
307 | };
308 | 
309 | function _amountStrToBigint(input: string, decimals: number): bigint {
310 |     const [whole, fraction = ""] = input.split(".");
311 |     const base = BigInt(whole) * 10n ** 18n;
312 |     console.log(`whole: ${whole}, fraction: ${fraction}`);
313 |     const exponent = BigInt(fraction) * 10n ** BigInt(18 - fraction.length);
314 |     console.log("base:", base);
315 |     console.log("exponent:", exponent);
316 |     return base + exponent;
317 | }
318 | 
319 | function _bigIntToAmountStr(input: bigint, decimals: number): string {
320 |     const base = input.toString();
321 |     const whole = base.slice(0, -decimals) || "0";
322 |     const fraction = base.slice(-decimals).replace(/0+$/, "");
323 |     if (fraction.length === 0) return whole;
324 |     else return `${whole}.${fraction}`;
325 | }
326 | 
327 | export default SendPage;
328 | 


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