add binary

Signed-off-by: Stéphane Depierrepont <toorop@toorop.fr>
check host

Signed-off-by: Stéphane Depierrepont <toorop@toorop.fr>
Add helper handleError

Signed-off-by: Stéphane Depierrepont <toorop@toorop.fr>
add BackupWallet

Signed-off-by: Stéphane Depierrepont <toorop@toorop.fr>