Struct TokenUrDecoder 

pub struct TokenUrDecoder { /* private fields */ }

Reassembles a Token from scanned UR fragments

QR frames are fed with receive as they are scanned, in any order; complete reports when enough frames have been seen and token returns the reassembled token.

Implementations

impl TokenUrDecoder

pub fn receive(&mut self, part: &str) -> Result<(), Error>

Feeds one scanned QR frame into the decoder

Accepts both multi-part fragments (ur:bytes/<seq>-<len>/<payload>) and the single-part form (ur:bytes/<payload>).

Errors

Returns an error if the frame is not a well-formed ur:bytes UR, is inconsistent with previously received frames, exceeds the decoder resource limits, or fails checksum validation.

pub fn complete(&self) -> bool

Returns whether the token has been fully reassembled

pub fn token(&self) -> Result<Option<Token>, Error>

Returns the reassembled Token once complete

Returns None while decoding is incomplete.

Errors

Returns an error if the reassembled payload is not a valid token.

pub fn fragment_count(&self) -> usize

Returns the total number of fragments the token was split into

This is 0 until the first multi-part fragment is received.

pub fn resolved_fragment_count(&self) -> Option<usize>

Returns the number of fragments resolved so far, either received directly or recovered via the fountain code

Useful for progress indication. Returns None before any fragment has been received.

Trait Implementations

impl Debug for TokenUrDecoder

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for TokenUrDecoder

fn default() -> TokenUrDecoder

Returns the “default value” for a type.