|
| 1 | +--- |
| 2 | +sidebar_position: 16 |
| 3 | +sidebar_label: '📚 Resources & Troubleshooting' |
| 4 | +--- |
| 5 | +# Resources & Troubleshooting |
| 6 | + |
| 7 | +## Troubleshooting |
| 8 | + |
| 9 | +### ReferenceError: Can't find variable: BigInt using React |
| 10 | + |
| 11 | +Occasionally, users encounter errors in web3.js due to external dependencies, which may seem challenging to resolve within the web3.js framework alone. |
| 12 | + |
| 13 | +**Resolution Steps:** |
| 14 | + |
| 15 | +1. Install `rn-nodeify` as a development dependency: |
| 16 | +```bash |
| 17 | +yarn add --dev rn-nodeify |
| 18 | +``` |
| 19 | + |
| 20 | +2. Add the `big-integer` package: |
| 21 | +```bash |
| 22 | +yarn add big-integer |
| 23 | +``` |
| 24 | + |
| 25 | +3. Create a file named `shim.js` at the root of your project and include the following polyfill: |
| 26 | +```ts |
| 27 | +if (typeof BigInt === 'undefined') { |
| 28 | + global.BigInt = require('big-integer'); |
| 29 | +} |
| 30 | +``` |
| 31 | + |
| 32 | +4. Import shim.js at the top of your App.js: |
| 33 | +```ts |
| 34 | +// Make sure you use `import` and not `require`! |
| 35 | +import './shim.js' |
| 36 | +``` |
| 37 | + |
| 38 | +Additional Info: |
| 39 | + |
| 40 | +[Facebook/React-native Issue #28492](https://github.com/facebook/react-native/issues/28492#issuecomment-824698934) |
| 41 | + |
| 42 | +## Resources |
| 43 | + |
| 44 | +### [Web3.js v4 course](https://www.youtube.com/watch?v=3ZO_t-Kyr1g&list=PLPn3rQCo3XrP4LbQcOyyHQR8McV7w3HZT) |
| 45 | + |
| 46 | +This comprehensive 14-part video course from ChainSafe equips you with the skills to conquer the blockchain using web3.js v4. Unlock the potential of web3.js v4 and build cutting-edge dApps. This course caters to all skill levels. |
| 47 | + |
| 48 | +[](https://www.youtube.com/watch?v=3ZO_t-Kyr1g&list=PLPn3rQCo3XrP4LbQcOyyHQR8McV7w3HZT) |
| 49 | + |
| 50 | + |
| 51 | +### [Web3.js series](https://www.youtube.com/watch?v=BQ_bDH91S4k&list=PLPn3rQCo3XrNf__8irs4-MjMt4fJqW2I_) |
| 52 | + |
| 53 | +This series of 3 videos takes you on a journey through web3.js. Whether you're a complete beginner or want to refine your skills, these videos have something for you: |
| 54 | + |
| 55 | +1. Getting Started: Kick off your web3 adventure by learning the ropes of web3.js. Master the basics, from installation to making your first call to the blockchain. |
| 56 | + |
| 57 | +2. Essential Tools: Unleash the power of web3.js utilities! From generating random bytes to hashing and checksumming addresses, you'll gain mastery of essential tools for Ethereum development. |
| 58 | + |
| 59 | +3. Sending Transactions: Dive deep into wallets and accounts. Learn how to sign and send transactions to the network, empowering you to interact with the blockchain directly. |
| 60 | + |
| 61 | +[](https://www.youtube.com/watch?v=BQ_bDH91S4k&list=PLPn3rQCo3XrNf__8irs4-MjMt4fJqW2I_) |
| 62 | + |
| 63 | +## Hackathons and Bounties |
| 64 | + |
| 65 | +You'll find the latest hackathons opportunities by following [web3js](https://twitter.com/web3_js) on X. |
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