Enum DTGCredentialType 

#[non_exhaustive]
pub enum DTGCredentialType {
    Membership,
    Relationship,
    Invitation,
    Persona,
    Statement,
    Authority,
    Delegation,
}

DTG VC Type Identifiers — the concrete DTGCredential subtypes the v1 context defines.

PartialEq is derived so that a consumer can assert by equality (assert_eq!(cred.credential_type(), &DTGCredentialType::Delegation)) rather than by pattern (matches!), which reports the actual variant on failure.

What is no longer here

EndorsementCredential and WitnessCredential are not DTG types: DTG Core Credentials replaced them with the DTGCredentialType::Statement type under the ENDORSES_V1 and WITNESSED_V1 predicate profiles, and a VSC carries its meaning in predicate alone so that a type string and a predicate can never disagree. RCardCredential is not a DTG credential at all — the r-card is a verifiable data structure. A credential naming any of the three is refused at parse with DTGCredentialError::InvalidType.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Membership

Verifiable Membership Credential (VMC) — one half of a membership edge.

Relationship

Verifiable Relationship Credential (VRC) — one half of a relationship edge.

Invitation

Verifiable Invitation Credential (VIC).

Persona

Verifiable Persona Credential (VPC).

Statement

Verifiable Statement Credential (VSC) — a signed statement by one node about another, whose meaning is fixed by its predicate.

The VEC and the VWC are VSCs under the ENDORSES_V1 and WITNESSED_V1 profiles.

Authority

Verifiable Authority Credential (VAC) — confers authority on a party to perform specified actions within a named scope governed by the issuer.

Key control at invocation — a VAC is not a bearer credential — and the maxAttenuation ceiling are implemented in crate::authority::verify_chain. Revocation via credentialStatus is a live lookup the caller performs.

Delegation

Verifiable Delegation Credential (VDC) — establishes that one entity may act in another’s name.

Implementations

impl DTGCredentialType

pub fn as_str(&self) -> &'static str

The type string this subtype is named by on the wire.

Trait Implementations

impl Clone for DTGCredentialType

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DTGCredentialType

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

Formats the value using the given formatter.

impl Display for DTGCredentialType

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

Formats the value using the given formatter.

impl Eq for DTGCredentialType

impl PartialEq for DTGCredentialType

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for DTGCredentialType

impl TryFrom<&[String]> for DTGCredentialType

fn try_from(types: &[String]) -> Result<Self, Self::Error>

The concrete subtype a type array names, under the same rules a parse applies: see DTGCredentialError::InvalidType.

type Error = DTGCredentialError

The type returned in the event of a conversion error.