device: enable to use multiple independent device wallets

- adds a new option `--hw-device-deriv-path` to the simple wallet. Enables to specify wallet derivation path / wallet code (path avoided so it can be misinterpreted as a file path).
- devices can use different derivation mechanisms. Trezor uses standard SLIP-10 mechanism with fixed SLIP-44 prefix for Monero
- Trezor: when empty, the default derivation mechanism is used with 44'/128'/0'. When entered the derivation path is 44'/128'/PATH.
- Trezor: the path is always taken as elements are hardened (1<<31 bit turned on)

1 files changed, 2 insertions, 0 deletions

diff --git a/src/simplewallet/simplewallet.cpp b/src/simplewallet/simplewallet.cpp
index 6d19235c5..07084d15b 100644
--- a/src/simplewallet/simplewallet.cpp
+++ b/src/simplewallet/simplewallet.cpp
@@ -3804,9 +3804,11 @@ boost::optional<epee::wipeable_string> simple_wallet::new_wallet(const boost::pr
     m_wallet->set_refresh_from_block_height(m_restore_height);
 
   auto device_desc = tools::wallet2::device_name_option(vm);
+  auto device_derivation_path = tools::wallet2::device_derivation_path_option(vm);
   try
   {
     bool create_address_file = command_line::get_arg(vm, arg_create_address_file);
+    m_wallet->device_derivation_path(device_derivation_path);
     m_wallet->restore(m_wallet_file, std::move(rc.second).password(), device_desc.empty() ? "Ledger" : device_desc, create_address_file);
     message_writer(console_color_white, true) << tr("Generated new wallet on hw device: ")
       << m_wallet->get_account().get_public_address_str(m_wallet->nettype());