Struct VerifyShareRequestMessage 

pub struct VerifyShareRequestMessage {
    pub version: i32,
    pub nonce: u64,
    pub timestamp: Option<Timestamp>,
}

VerifyShareRequestMessage initiates a verification challenge from the Owner to a Helper to confirm that the Helper still retains a specific share.

Context

This message is part of the verification flow, which allows the Owner to:

• periodically check Helper liveness
• detect data loss or corruption of stored shares
• identify Helpers that are no longer reliable for recovery

Semantics

The Owner challenges the Helper by providing:

• a version identifying the share to verify
• a fresh nonce to ensure the response is unique and not replayable

The Helper MUST compute a cryptographic hash over:

committedDeRecShare || nonce

and return the result in a VerifyShareResponseMessage.

Security Properties

• The nonce ensures freshness and prevents replay attacks
• The hash proves possession of the exact share bytes
• The Helper cannot produce a valid response without holding the share

Idempotency

Each request is uniquely identified by the nonce. Reusing a nonce SHOULD be avoided, as it weakens replay protection guarantees.

Fields

version: i32

Share version being challenged.

This identifies which stored share the Helper must use to compute the verification proof.

nonce: u64

Random challenge nonce generated by the Owner.

This value MUST be unpredictable and unique per request to ensure freshness and prevent replay of previous responses.

timestamp: Option<Timestamp>

Timestamp indicating when this message was created.

This value is expressed in UTC and can be used for:

• observability and logging
• replay detection (in combination with sequence numbers)
• timeout handling

Trait Implementations

impl Clone for VerifyShareRequestMessage

fn clone(&self) -> VerifyShareRequestMessage

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for VerifyShareRequestMessage

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

Formats the value using the given formatter.

impl Default for VerifyShareRequestMessage

fn default() -> Self

Returns the “default value” for a type.

impl Hash for VerifyShareRequestMessage

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Message for VerifyShareRequestMessage

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited( &self, buf: &mut impl BufMut, ) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for VerifyShareRequestMessage

fn eq(&self, other: &VerifyShareRequestMessage) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for VerifyShareRequestMessage

impl Eq for VerifyShareRequestMessage

impl StructuralPartialEq for VerifyShareRequestMessage