I can provide you with an article on how to use the Metamask eth_getEncryptionPublicKey function to encrypt data files before uploading them to IPFS.
Data Encryption in Metamask: Using eth_getEncryptionPublicKey
In this article, we will explore how to use the Metamask eth_getEncryptionPublicKey function to encrypt data files before uploading them to IPFS. This is a useful feature that allows you to secure your local storage and prevent unauthorized access.
What is Eth_getEncryptionPublicKey?
eth_getEncryptionPublicKey is a metamask function that retrieves the public key of an Ethereum account. In this case, we will use it to retrieve the public key of the owner of our IPFS container.
Metamask Setup
To use eth_getEncryptionPublicKey, you need to have MetaMask installed and configured on your device. Here are the steps:
- Download and install MetaMask from the official website: <
- Launch MetaMask on your device.
- Connect your Ethereum wallet.
Using eth_getEncryptionPublicKey
Once MetaMask is configured, you can use eth_getEncryptionPublicKey to retrieve the public key of the owner of your IPFS container:
const metamask = require('metamask');
// Set the Ethereum address of your IPFS container
const containerAddress = '0x...';
// Set the Metamask wallet ID
const walletId = '0x...';
// Get the public key using eth_getEncryptionPublicKey
const publicKey = wait metamask.getEncryptionPublicKey(containerAddress, walletId);
console.log('Public Key:', publicKey);
Data Encryption
To encrypt data files before uploading them to IPFS, you can use a library like ‘Buffer’ and ‘crypto’ in Node.js:
const Buffer = require('buffer');
const crypto = require('crypto');
// Read the file contents
const fileContents = fs.readFileSync('path/to/file.txt', 'utf8');
// Create a new AES-GCM cipher instance with a key from the Metamask public key
const iv = crypto.randomBytes(16);
const cipher = crypto.createCipheriv('aes-256-gcm', Buffer.from(publicKey, 'hex'), iv);
// Encrypt the file contents
const encryptedFileContents = wait cipher.update(fileContents);
Encrypted File Contents = Buffer.concat([Encrypted File Contents, iv]);
const encryptedData = wait cipher.final();
console.log('Encrypted Data:', encryptedData.toString());
Saving encrypted data
To save encrypted data to a new file on your device:
fs.writeFileSync('path/to/encrypted/file.txt', encryptedData);
Conclusion
In this article, we explored how to use the eth_getEncryptionPublicKey function in Metamask to retrieve the public key of an Ethereum account and then encrypt the data files before uploading them to IPFS. This feature provides a secure way to protect your local storage and prevent unauthorized access.
Note: Make sure that MetaMask is installed and configured on your device and that the container address is correctly specified in the eth_getEncryptionPublicKey function.
Additional Resources
- [MetaMask Documentation](
- [IPFS Documentation](
- [Buffer library documentation](
- [Crypto library documentation](