Enum ChainAlgorithmCompatibility 

pub enum ChainAlgorithmCompatibility {
    Uniform(SignatureAlgorithm),
    MixedClassicalToHybrid {
        classical_depth: usize,
        hybrid_algorithm: SignatureAlgorithm,
    },
}

Describes the signature algorithm consistency of a DyoloChain.

A chain is algorithm-compatible when:

• All certs report the same SignatureAlgorithm (Uniform), OR
• The chain is undergoing a classical → hybrid migration, where earlier certs (closer to the root) use Ed25519 and later certs use a hybrid scheme. The transition must be monotonic — no hybrid cert may appear before a classical one in the chain.

Variants

Uniform(SignatureAlgorithm)

All certs use the same algorithm.

MixedClassicalToHybrid

The chain is transitioning from classical Ed25519 to a hybrid scheme.

classical_depth is the number of leading Ed25519 certs. All certs at positions ≥ classical_depth use hybrid_algorithm.

Fields

classical_depth: usize

hybrid_algorithm: SignatureAlgorithm

Implementations

impl ChainAlgorithmCompatibility

pub fn from_algorithms(algs: &[SignatureAlgorithm]) -> Result<Self, A1Error>

Derive the compatibility descriptor from an ordered list of algorithm tags.

Returns Err if:

• A hybrid cert appears before a classical cert (non-monotonic).
• Multiple distinct hybrid algorithms are present in a single chain.

Trait Implementations

impl Clone for ChainAlgorithmCompatibility

fn clone(&self) -> ChainAlgorithmCompatibility

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ChainAlgorithmCompatibility

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

Formats the value using the given formatter.

impl PartialEq for ChainAlgorithmCompatibility

fn eq(&self, other: &ChainAlgorithmCompatibility) -> 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 Eq for ChainAlgorithmCompatibility

impl StructuralPartialEq for ChainAlgorithmCompatibility