initial commit with upload CSV button working

.env.sample

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+PORT=3000
+HTTPS=true
+REACT_APP_INFURA_ID=

.gitignore

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+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# production
+/build
+
+# misc
+.DS_Store
+.env
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*

README.md

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+# My Safe App
+
+## Getting Started
+
+Install dependencies and start a local dev server.
+
+```
+yarn install
+cp .env.sample .env
+yarn start
+```
+
+Then:
+
+- If HTTPS is used (by default enabled)
+  - Open your Safe app locally (by default via https://localhost:3000/) and accept the SSL error.
+- Go to Safe Multisig web interface
+  - [Mainnet](https://app.gnosis-safe.io)
+  - [Rinkeby](https://rinkeby.gnosis-safe.io/app)
+- Create your test safe
+- Go to Apps -> Manage Apps -> Add Custom App
+- Paste your localhost URL, default is https://localhost:3000/
+- You should see Safe App Starter as a new app
+- Develop your app from there
+
+## Features
+
+Gnosis Safe App Starter combines recommendations described in the following repositories:
+
+- [Safe Apps SDK](https://github.com/gnosis/safe-apps-sdk)
+- [safe-react-components](https://github.com/gnosis/safe-react-components)
+
+You can use the `useSafe` React hook to interact with the Safe Apps SDK
+
+```
+const safe = useSafe();
+console.log(safe.info);
+```
+
+Safe React Components are also integrated and ready to use. [See all components](https://components.gnosis-safe.io/).
+
+## Dependencies
+
+### Included
+- [`@gnosis.pm/safe-react-components`](https://github.com/gnosis/safe-react-components) (UI components themed for the Safe Multisig interface)
+- [`@rmeissner/safe-apps-react-sdk`](https://github.com/rmeissner/safe-sdks-js/tree/master/safe-apps-react-sdk) (React hook for the Safe Apps SDK)
+
+### Recommended
+- [`ethers`](https://github.com/ethers-io/ethers.js) (Library for interacting with Ethereum)
+- [`web3`](https://github.com/ethereum/web3.js/) (Library for interacting with Ethereum)
+- [`@studydefi/money-legos`](https://github.com/studydefi/money-legos) (Library for DeFi interactions)

config-overrides.js

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+module.exports = {
+  webpack: function (config, env) {
+    return config;
+  },
+  jest: function (config) {
+    return config;
+  },
+  devServer: function (configFunction) {
+    return function (proxy, allowedHost) {
+      const config = configFunction(proxy, allowedHost);
+
+      config.headers = {
+        "Access-Control-Allow-Origin": "*",
+        "Access-Control-Allow-Methods": "GET",
+        "Access-Control-Allow-Headers":
+          "X-Requested-With, content-type, Authorization",
+      };
+
+      return config;
+    };
+  },
+  paths: function (paths, env) {
+    return paths;
+  },
+};

package.json

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+{
+  "name": "my-safe-app",
+  "version": "0.1.0",
+  "private": true,
+  "dependencies": {
+    "@gnosis.pm/safe-apps-sdk": "^0.3.1",
+    "@gnosis.pm/safe-react-components": "^0.2.0",
+    "@material-ui/core": "^4.11.0",
+    "@rmeissner/safe-apps-react-sdk": "0.4.0",
+    "@testing-library/jest-dom": "^5.11.4",
+    "@testing-library/react": "^10.4.9",
+    "@testing-library/user-event": "^12.1.3",
+    "@types/jest": "^26.0.10",
+    "@types/node": "^14.6.2",
+    "@types/react": "^16.9.0",
+    "@types/react-dom": "^16.9.0",
+    "@types/styled-components": "^5.1.2",
+    "bignumber.js": "^9.0.1",
+    "csv-parser": "^2.3.3",
+    "fast-csv": "^4.3.5",
+    "react": "^16.13.1",
+    "react-app-rewired": "^2.1.6",
+    "react-csv-reader": "^3.1.1",
+    "react-dom": "^16.13.1",
+    "react-scripts": "3.4.3",
+    "styled-components": "^5.1.1",
+    "typescript": "~4.0.2"
+  },
+  "scripts": {
+    "start": "react-app-rewired start",
+    "build": "react-app-rewired build",
+    "test": "react-app-rewired test",
+    "eject": "react-scripts eject"
+  },
+  "eslintConfig": {
+    "extends": [
+      "react-app",
+      "plugin:jsx-a11y/recommended"
+    ],
+    "plugins": [
+      "jsx-a11y"
+    ]
+  },
+  "browserslist": {
+    "production": [
+      ">0.2%",
+      "not dead",
+      "not op_mini all"
+    ],
+    "development": [
+      "last 1 chrome version",
+      "last 1 firefox version",
+      "last 1 safari version"
+    ]
+  },
+  "homepage": "./"
+}

public/index.html

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+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8" />
+    <link rel="icon" href="%PUBLIC_URL%/favicon.ico" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <meta name="theme-color" content="#000000" />
+    <meta
+      name="description"
+      content="Web site created using create-react-app"
+    />
+    <link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
+    <!--
+      manifest.json provides metadata used when your web app is installed on a
+      user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/
+    -->
+    <link rel="manifest" href="%PUBLIC_URL%/manifest.json" />
+    <!--
+      Notice the use of %PUBLIC_URL% in the tags above.
+      It will be replaced with the URL of the `public` folder during the build.
+      Only files inside the `public` folder can be referenced from the HTML.
+
+      Unlike "/favicon.ico" or "favicon.ico", "%PUBLIC_URL%/favicon.ico" will
+      work correctly both with client-side routing and a non-root public URL.
+      Learn how to configure a non-root public URL by running `npm run build`.
+    -->
+    <title>Gnosis Safe App</title>
+  </head>
+  <body>
+    <noscript>You need to enable JavaScript to run this app.</noscript>
+    <div id="root"></div>
+    <!--
+      This HTML file is a template.
+      If you open it directly in the browser, you will see an empty page.
+
+      You can add webfonts, meta tags, or analytics to this file.
+      The build step will place the bundled scripts into the <body> tag.
+
+      To begin the development, run `npm start` or `yarn start`.
+      To create a production bundle, use `npm run build` or `yarn build`.
+    -->
+  </body>
+</html>

public/manifest.json

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+{
+  "short_name": "Safe Airdrop",
+  "name": "Gnosis Safe CSV Airdrop",
+  "description": "A simple Gnosis Safe app used to upload CSV transfer files to send aribitrarily many distinct tokens to arbitrarily many recipients",
+  "iconPath": "logo.svg",
+  "icons": [
+    {
+      "src": "favicon.ico",
+      "sizes": "64x64 32x32 24x24 16x16",
+      "type": "image/x-icon"
+    },
+    {
+      "src": "logo192.png",
+      "type": "image/png",
+      "sizes": "192x192"
+    },
+    {
+      "src": "logo512.png",
+      "type": "image/png",
+      "sizes": "512x512"
+    }
+  ],
+  "start_url": ".",
+  "display": "standalone",
+  "theme_color": "#000000",
+  "background_color": "#ffffff"
+}

public/robots.txt

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+# https://www.robotstxt.org/robotstxt.html
+User-agent: *
+Disallow:

src/App.tsx

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+/** @format */
+import { Transaction } from "@gnosis.pm/safe-apps-sdk";
+import BigNumber from "bignumber.js";
+import React, { useCallback, useState } from "react";
+import styled from "styled-components";
+import { Button, Loader, Title } from "@gnosis.pm/safe-react-components";
+import { useSafe } from "@rmeissner/safe-apps-react-sdk";
+import { parseString } from "@fast-csv/parse";
+
+const Container = styled.form`
+  margin-bottom: 2rem;
+  width: 100%;
+  max-width: 480px;
+
+  display: grid;
+  grid-template-columns: 1fr;
+  grid-column-gap: 1rem;
+  grid-row-gap: 1rem;
+`;
+
+interface SnakePayment {
+  receiver: string;
+  amount: string;
+  token_address: string;
+}
+interface Payment {
+  receiver: string;
+  amount: BigNumber;
+  tokenAddress: string;
+}
+
+const App: React.FC = () => {
+  const safe = useSafe();
+  const [submitting, setSubmitting] = useState(false);
+  const [transferContent, setTransferContent] = useState<Payment[]>([]);
+
+  const onChangeHandler = async (event: any) => {
+    console.log("Received Filename", event.target.files[0].name);
+
+    const reader = new FileReader();
+    const filePromise = new Promise<SnakePayment[]>((resolve, reject) => {
+      reader.onload = function (evt) {
+        if (!evt.target) {
+          return;
+        }
+        // Parse CSV
+        const results: any[] = [];
+        parseString(evt.target.result as string, { headers: true })
+          .on("data", (data) => results.push(data))
+          .on("end", () => resolve(results))
+          .on("error", (error) => reject(error));
+      };
+    });
+
+    reader.readAsText(event.target.files[0]);
+    const parsedFile = await filePromise;
+
+    const results: Payment[] = parsedFile
+      .map(({ amount, receiver, token_address }) => ({
+        amount: new BigNumber(amount),
+        receiver,
+        tokenAddress: token_address,
+      }))
+      .filter((payment) => !payment.amount.isZero());
+    setTransferContent(results);
+  };
+
+  const submitTx = useCallback(async () => {
+    setSubmitting(true);
+    try {
+      // const safeTxHash = await safe.sendTransactions([
+      //   {
+      //     to: safe.info.safeAddress,
+      //     value: "0",
+      //     data: "0x",
+      //   },
+      //   {
+      //     to: safe.info.safeAddress,
+      //     value: "0",
+      //     data: "0x",
+      //   },
+      // ]);
+      const txList: Transaction[] = transferContent.map((transfer) => {
+        return {
+          to: transfer.tokenAddress,
+          value: "0",
+          data: "0x",
+        };
+      });
+      const safeTxHash = await safe.sendTransactions(txList);
+      console.log({ safeTxHash });
+      const safeTx = await safe.loadSafeTransaction(safeTxHash);
+      console.log({ safeTx });
+    } catch (e) {
+      console.error(e);
+    }
+    setSubmitting(false);
+  }, [safe]);
+
+  return (
+    <Container>
+      <Title size="md">{safe.info.safeAddress}</Title>
+
+      <input type="file" name="file" onChange={onChangeHandler} />
+
+      <table>
+        <thead>
+          <tr>
+            <td>Token</td>
+            <td>Receiver</td>
+            <td>Amount</td>
+          </tr>
+        </thead>
+        <tbody>
+          {transferContent.map((row, index) => {
+            return (
+              <tr key={index}>
+                <td>{row.tokenAddress}</td>
+                <td>{row.receiver}</td>
+                <td>{row.amount.toString(10)}</td>
+              </tr>
+            );
+          })}
+        </tbody>
+      </table>
+      {submitting ? (
+        <>
+          <Loader size="md" />
+          <br />
+          <Button
+            size="lg"
+            color="secondary"
+            onClick={() => {
+              setSubmitting(false);
+            }}
+          >
+            Cancel
+          </Button>
+        </>
+      ) : (
+        <Button size="lg" color="primary" onClick={submitTx}>
+          Submit
+        </Button>
+      )}
+    </Container>
+  );
+};
+
+export default App;