Struct MembershipChain 

pub struct MembershipChain { /* private fields */ }

An append-only membership chain.

Entries are sorted by timestamp (HLC string comparison gives causal order).

Implementations

impl MembershipChain

pub fn new() -> Self

Create an empty chain.

pub fn from_entries( entries: Vec<MembershipEntry>, ) -> Result<Self, MembershipError>

Create a chain from existing entries (e.g., downloaded from storage). Entries are sorted by timestamp and validated on construction.

pub fn entries(&self) -> &[MembershipEntry]

Return the entries in the chain.

pub fn validate(&self) -> Result<(), MembershipError>

Validate the entire chain.

Rules:

1. First entry must be Add with role Owner, self-signed.
2. Every entry must have a valid signature.
3. Every entry’s author must be a current Owner at that point.

pub fn is_member_at(&self, pubkey: &str, timestamp: &str) -> bool

Check if a pubkey was an active member at the given timestamp.

Replays entries up to and including the given timestamp.

pub fn current_members(&self) -> Vec<(String, MemberRole)>

Return current active members with their roles.

pub fn add_entry( &mut self, entry: MembershipEntry, ) -> Result<(), MembershipError>

Validate and append an entry to the chain.

Trait Implementations

impl Clone for MembershipChain

fn clone(&self) -> MembershipChain

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for MembershipChain

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

Formats the value using the given formatter.

impl Default for MembershipChain

fn default() -> MembershipChain

Returns the “default value” for a type.