This NPM package provides the Eth class, which extends the functionality of Keystone hardware wallets for Ethereum operations.
The Eth class offers several key methods to handle Ethereum transactions and account operations, including:
This static asynchronous method creates an Eth instance using a TransportWebUSB instance. It connects to the USB device, closes the connection, and then returns a new Eth instance.
This asynchronous method checks the lock status of the wallet.
This asynchronous method signs a provided Ethereum transaction. It first determines the type of the transaction, then generates a message to sign. The method encodes the transaction into a UR and sends it to the hardware wallet for signing. The signed transaction is then returned.
This asynchronous method takes a urString as input, sends it to the hardware wallet and returns the response.
This asynchronous method sends a request to the hardware wallet to export a public key or account from a UR. The method decodes the response UR and returns a CryptoHDKey or CryptoAccount instance.
import Eth from '@keystonehq/hw-app-eth';
async function example() {
const eth = await Eth.createWithUSBTransport();
// Check lock status
const lockStatus = await eth.checkLockStatus();
console.log(lockStatus);
// Sign transaction
// ... setup keyringInstance, address, tx
const signedTx = await eth.signTransaction(keyringInstance, address, tx);
console.log(signedTx);
}
example();