eth-authentrend-keyring

An implementation of MetaMask's Keyring interface, that uses a AuthenTrend AT.Wallet hardware wallet for all cryptographic operations.

In most regards, it works in the same way as eth-hd-keyring, but using a AuthenTrend AT.Wallet device. However there are a number of differences:

• Because the keys are stored in the device, operations that rely on the device will fail if there is no AuthenTrend AT.Wallet device attached, or a different AuthenTrend AT.Wallet device is attached.

• It does not support the signMessage, signPersonalMessage, signTypedData or exportAccount methods, because AuthenTrend AT.Wallet devices do not support these operations.

• Because extensions have limited access to browser features, there's no easy way to interact wth the AuthenTrend Hardware wallet from the MetaMask extension. This library implements a workaround to those restrictions by injecting (on demand) an iframe to the background page of the extension, (which is hosted here.

Usage

In addition to all the known methods from the Keyring class protocol, there are a few others:

• isUnlocked : Returns true if we have the public key in memory, which allows to generate the list of accounts at any time

• unlock : Connects to the AuthenTrend AT.Wallet device and exports the extended public key, which is later used to read the available ethereum addresses inside the AuthenTrend AT.Wallet account.

• setAccountToUnlock : the index of the account that you want to unlock in order to use with the signTransaction and signPersonalMessage methods

• getFirstPage : returns the first ordered set of accounts from the AuthenTrend AT.Wallet account

• getNextPage : returns the next ordered set of accounts from the AuthenTrend AT.Wallet account based on the current page

• getPreviousPage : returns the previous ordered set of accounts from the AuthenTrend AT.Wallet account based on the current page

• forgetDevice : removes all the device info from memory so the next interaction with the keyring will prompt the user to connect the AuthenTrend AT.Wallet device and export the account information

Testing

Run the following command:

npm test

Attributions

This code was inspired by eth-ledger-keyring and eth-hd-keyring