OneTimeCode

The code a person types from an authenticator app, a text message or an email (RFC 4226 and RFC 6238): six to eight digits, a leading zero kept. A secret value, checked when it arrives and never kept.

Security; not ordered; since Jadpo 0.1.0.

Make one

It comes from outside your code, a secret value that never appears in it.

text.parse(raw, as: OneTimeCode) reads one from its text; text that isn't one at all fails malformed, such as 28708, 942870820 or 287 082.

Text, JSON and storage

text.parse reads one from its text, as it is typed. Nothing writes it: text.from and text.format don't take it, JSON writes it as "<redacted OneTimeCode>", and it is never stored.

Shown to people

text.format doesn't take it: a OneTimeCode is never shown.

Operations

It has the contract's own operations: text.parse, json.read, json.write and ==. It isn't ordered, so < and sorting don't take it. Every standard type meets one contract says how they work.