Struct Checkpoint 

pub struct Checkpoint {
    pub seq: u64,
    pub chain_tip: String,
    pub created_at: String,
    pub signature: String,
}

A signed commitment to the chain tip at a point in time. Periodically emitted and anchored to an independent, append-only sink (a separate database, a WORM store, or an RFC 3161 timestamp) so that a later attempt to rewrite or truncate the local chain is detectable: the anchored (seq, chain_tip) can no longer be reproduced from the shortened chain.

This is the Certificate-Transparency “signed checkpoint” idiom. The signature is Ed25519 over the canonical (seq, chain_tip, created_at), so an auditor verifies it with only the public key.

A Checkpoint value carries no validity guarantee on its own: validity is established solely by verify_checkpoints under the public key. A checkpoint loaded from a sink is untrusted input until verified.

Fields

seq: u64

seq of the chain tip this checkpoint commits to (the last row at emit time).

chain_tip: String

chain_hash of the row at seq (the committed chain tip).

created_at: String

RFC 3339 timestamp when the checkpoint was signed.

signature: String

Hex Ed25519 signature over canonical(seq, chain_tip, created_at).

Trait Implementations

impl Clone for Checkpoint

fn clone(&self) -> Checkpoint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Checkpoint

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

Formats the value using the given formatter.

impl Eq for Checkpoint

impl PartialEq for Checkpoint

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Checkpoint