NewLedgerHub creates a new hardware wallet manager for Ledger devices.

NewTrezorHub creates a new hardware wallet manager for Trezor devices.

LedgerScheme is the protocol scheme prefixing account and wallet URLs.

TrezorScheme is the protocol scheme prefixing account and wallet URLs.

ErrTrezorPINNeeded is returned if opening the trezor requires a PIN code.

Hub is a accounts.Backend that can find and handle generic USB hardware wallets.