as a user I can sign a transaction with the Keystone hardware wallet

[true-jared]

ZASHI / KEYSTONE SWITCH

• as a user I can switch between Zashi and Keystone wallet by tapping on the Zashi/Keystone dropdown and selecting the wallet in the bottom sheet
  • if a user has a Zashi wallet selected - the transaction should be sent from the Zashi wallet
  • if a user has a Keystone wallet selected - the transaction should be sent from the Keystone wallet

SEND A TRANSACTION FROM KEYSTONE ACCOUNT

1. if a user has a Keystone wallet connected, once they click on the Address Book icon in the [Send to] field, they should see an updated version of Address Book screen which also displays the addresses of their connected wallets at the top of the screen with the header "Your Wallets"

• implement empty state for the updated version of the Address Book screen

2. update the Confirmation Screen:

• change screen title to "REVIEW"
• center the Total Amount (this change should be propagated to our regular Confirmation screen as well)
• add "Send from" information with the Zashi logo / Keystone logo
• if a user taps on [Confirm with Keystone] button, we should generate the QR code they can scan with their Keystone device and route them to the new Sign Transaction screen (specified below)
• if a user taps on the [Cancel] button, route them back to the pre-filled Send screen

3. build the new Sign Transaction screen

• display the Keystone label with the first 20 characters of the wallet address in the header together with a new [Hardware] label
• display the QR code with the encoded PCZT for the user to scan with their Keystone device
• display instructions for the user under the QR code
• when a user taps on the [Reject] button, route them back to the Account screen and reset the Send form
• when a user taps on the [Get Signature] button, route them to the Scan screen with instructions
  • once a user scans the signature QR code, route them to the transaction progress screen
  • if a user taps on the [Cancel] button on the Scan screen, route them back to the Sign Transaction screen