Metamask: Encryption with public key from the eth_getEncryptionPublicKey metamask function

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I can provide you with an article on how to use the metamask function “eth_getEncryptionPublicKey” to encrypt data files before uploading them to IPFS.

Data Encryption with Metamask: Using eth_getEncryptionPublicKey

In this article, we will explore how to use the metamask function “eth_getEncryptionPublicKey” 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.

Setting up Metamask

To use “eth_getEncryptionPublicKey”, you need to install MetaMask. Here are the steps:

• Download and install MetaMask from the official website: <

• Launch MetaMask on your device.

• Connect to your Ethereum wallet.

Using eth_getEncryptionPublicKey

Once you have MetaMask set up, you can use eth_getEncryptionPublicKey to get the public key of the IPFS container owner:

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 the eth_getEncryptionPublicKey function
const publicKey = await metamask.getEncryptionPublicKey(containerAddress, walletId);
console.log('PublicKey:', publicKey);

Data Encryption

You can use Node.js libraries such as Buffer and crypto to encrypt your data files before uploading them to IPFS.

const Buffer = require('buffer');
const crypto = require('crypto');
// Read the contents of the file
const fileContents = fs.readFileSync('path/to/file.txt', 'utf8');
// Create a new AES-GCM cipher instance using the metamask public key
const iv = crypto.randomBytes(16);
const cipher = crypto.createCipheriv('aes-256-gcm', Buffer.from(publicKey, 'hex'), iv);
// Encrypt the contents of the file
const encryptedFileContents = await cipher.update(fileContents);
encryptedFileContents = Buffer.concat([encryptedFileContents, iv]);
const encryptedData = awaitEncryption.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 encrypt data files before uploading them to IPFS. This feature provides a secure way to protect local storage and prevent unauthorized access.

The eth_getEncryptionPublicKey function is used to install and configure MetaMask.

Additional Resources

• [MetaMask Documentation](

• [IPFS Documentation](

• [Buffer Library Documentation](

• [Crypto Library Documentation](

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