We need to preserve the seed phrase inside the device somehow.

[juanky201271]

For now I think the best option is to use this library: https://github.com/oblador/react-native-keychain.

And to put an emergency option to reveal the seed phrase in the first screen for both modes: basic & advanced.

In case something really bad happened, mostly corrupted wallet file... the user can extract the LAST seed phrase used in Zingo in this device.

[juanky201271]

This library uses:

• Keychain for IOS
• Keystore for Android.

Use Cases:

• When the App try to open the current wallet file and fail -> A new right side menu option like Recover the keys from the last wallet from the device.
• When install the App again after the App was uninstalled -> In the installation path if the App read from the device the keys of the last wallet used then it give to the user the possibility of open/restore the last wallet.