Optional ReadonlybackGoes back, as the system back does: closes this screen and answers the screen below it. Absent on a screen with nothing below it (a launch's or a tab's root).
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.
ReadonlychoosePicks the channel Instagram sends the security code over (method, SMS or email). Answers
what the challenge does next: the next challenge screen, or the challenge's end.
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.
ReadonlytoThe handle as JSON: its data.
The handle of ChallengeSelectVerifyMethodScreen: what you hold while the screen is open — its
dataand its actions (ChallengeSelectVerifyMethodActions).