Enum ChainReject 

pub enum ChainReject {
    Empty,
    Edge {
        index: usize,
        reason: DerivationReject,
    },
    RootNotTerminal {
        index: usize,
    },
    NonRootTerminus,
    UntrustedRoot {
        found: GrantId,
        expected: GrantId,
    },
    CidUnavailable,
}

Why a derivation chain is not trusted.

Variants

Empty

An empty chain proves nothing (fail-closed).

Edge

Edge index (child chain[index] → parent chain[index + 1]) failed check_derivation for the carried reason.

Fields

index: usize

reason: DerivationReject

RootNotTerminal

chain[index] is a Derivation::Root but is not the terminus — a root may only appear at the end of a chain (it derives from nothing).

Fields

index: usize

NonRootTerminus

The terminus is not a Derivation::Root: the chain does not bottom out at a self-standing root, so there is nothing to anchor trust to.

UntrustedRoot

The chain is structurally valid and terminates at a root, but that root is not the externally-configured trusted anchor. Structural validity is not trust: a CID identifies, it does not authorize. This is the reject that stops an attacker’s self-authored, internally-consistent chain.

Fields

found: GrantId

expected: GrantId

CidUnavailable

A CID needed to anchor the chain could not be computed (fail-closed).

Trait Implementations

impl Clone for ChainReject

fn clone(&self) -> ChainReject

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ChainReject

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

Formats the value using the given formatter.

impl Eq for ChainReject

impl PartialEq for ChainReject

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ChainReject