Tangem ETH card as 2FA device

[tschubotz]

Please see epic for details.

Lots of details still have to be worked out with the engineering team, hence I would start with a technical prototype first.

[posthnikova]

iOS new screens:

Pairing flow

Setup2FADevicesList

Tangem_Intro
@DmitryBespalov I added "Tap 'Start'..." to the description because the card should not be held before tapping Start.

Tangem_Intro (NFC Off)

Tangem_Intro (waiting for card)

Tangem_Intro (card not detected)
@DmitryBespalov I propose to change text here, I find "tag connection lost" not clear enough.

Tangem_Intro (scan complete)

Tangem_Card (success)

Signing flow

Send_Review2FARequired (Tangem Card)

Send_Review2FARequired (waiting for Tangem)

Send_Review2FARequired (Tangem error)

Send_Review2FARequired (Tangem rejected)

Send_Review2FARequired (Tangem scan complete)

Send_Review2FARequired (Tangem - confirmed)

Replace 2FA

Replace2FA (Tangem intro)

Replace2FA (Tangem success)

Replace2FA_Review (Tangem card)

TransactionDetail (replace 2FA - Tangem card)

TransactionDetail (replace 2FA failed - Tangem card)

TransactionDetail (replace 2FA pending - Tangem card)

Enable 2FA

Enable2FA_Review (Tangem card)

TransactionDetail (Enable2FA success - Tangem card)

TransactionDetail (Enable2FA failed - Tangem card)

TransactionDetail (Enable2FA pending - Tangem card)

Disable 2FA

Disable2FA_Review (Tangem card)

Recover Safe

Recover (2FA devices list)

Recover Safe (Tangem intro)

Recover Safe (Tangem card - success)

[posthnikova]

Android:

Setup 2FA

Send 2FA

Replace 2FA

Enable 2FA

Disable 2FA

Recover Safe

https://www.dropbox.com/s/0we6crronp97dr6/RecoverSafe_Android.png?dl=0

[DmitryBespalov]

looks good 👍