ReadonlybackGoes back, as the system back does: closes this screen and answers the screen below it, typed as the screens that can open this one.
ReadonlycheckpointTakes a checkpoint of the process with this screen on top: what a fresh
process needs to continue from it (restoreCheckpoint), the stack below
included, without opening any screen again.
ReadonlydataWhat the screen shows: its data, as its data schema types it.
ReadonlyidWhich screen this is: its id in the screen catalog (an item's: its item id).
ReadonlykindWhat kind of thing the screen is: a screen, a tab, an inner tab, a feed or an item.
ReadonlyoriginThe handle this one was opened from: the screen (or the item of its list)
whose call opened it, typed as what can open this screen; undefined for a
launch's or a tab's root.
ReadonlypipePasses the handle through the functions you give, left to right: handle.pipe(f, g) is g(f(handle)).
ReadonlyrawThe answers this visit received from the server, before any decoding; empty on a handle a checkpoint rebuilt.
Types the mobile number (with the country code) and taps Next: submits the number and asks for the SMS code. Answers the confirmation-code screen's handle; a refused number is a typed error and the screen stays on top.
ReadonlytoThe handle as JSON: its data.
The handle of RegistrationPhoneNumberScreen: what you hold while the screen is open — its
dataand its actions (RegistrationPhoneNumberActions).