What is @metamask/eth-sig-util?
@metamask/eth-sig-util is a utility library for Ethereum signature operations. It provides functions for signing and verifying messages, encoding and decoding data, and other cryptographic operations related to Ethereum.
What are @metamask/eth-sig-util's main functionalities?
Sign Typed Data
This feature allows you to sign typed data using a private key. The `signTypedData` function takes a private key and a message parameter, and returns a signature.
const { signTypedData } = require('@metamask/eth-sig-util');
const privateKey = Buffer.from('your-private-key', 'hex');
const msgParams = {
data: [{
type: 'string',
name: 'message',
value: 'Hello, world!'
}]
};
const signature = signTypedData({ privateKey, data: msgParams.data });
console.log(signature);
Recover Typed Signature
This feature allows you to recover the address that signed a typed data message. The `recoverTypedSignature` function takes a message parameter and a signature, and returns the address that signed the message.
const { recoverTypedSignature } = require('@metamask/eth-sig-util');
const msgParams = {
data: [{
type: 'string',
name: 'message',
value: 'Hello, world!'
}]
};
const signature = 'your-signature';
const address = recoverTypedSignature({ data: msgParams.data, sig: signature });
console.log(address);
Encrypt and Decrypt Data
This feature allows you to encrypt and decrypt data using public and private keys. The `encrypt` function takes a public key and data, and returns encrypted data. The `decrypt` function takes a private key and encrypted data, and returns the decrypted data.
const { encrypt, decrypt } = require('@metamask/eth-sig-util');
const publicKey = 'recipient-public-key';
const data = 'Hello, world!';
const encryptedData = encrypt({ publicKey, data });
console.log(encryptedData);
const privateKey = Buffer.from('your-private-key', 'hex');
const decryptedData = decrypt({ privateKey, encryptedData });
console.log(decryptedData);
Other packages similar to @metamask/eth-sig-util
eth-sig-util
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ethereumjs-util
ethereumjs-util is a collection of utility functions for Ethereum. It includes functions for signing and verifying messages, encoding and decoding data, and other cryptographic operations. It is a more general-purpose library compared to @metamask/eth-sig-util, which is specifically focused on signature utilities.
ethers
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