Struct CredentialBuilder 

pub struct CredentialBuilder {
    issuer: Option<String>,
    subject: Option<String>,
    credential_type: Option<AgentCredentialType>,
    claims: HashMap<String, Value>,
    expiration: Option<DateTime<Utc>>,
}

Builder for creating Verifiable Credentials.

Uses the builder pattern to construct well-formed credentials with required and optional fields.

Example

let credential = CredentialBuilder::new()
    .issuer("did:web:cellstate.batterypack.dev")
    .subject("did:web:cellstate.batterypack.dev:agents:00000000-0000-0000-0000-000000000000")
    .credential_type(AgentCredentialType::Identity)
    .claim("name", serde_json::json!("test-agent"))
    .build()
    .expect("credential should build");

Fields

issuer: Option<String>

subject: Option<String>

credential_type: Option<AgentCredentialType>

claims: HashMap<String, Value>

expiration: Option<DateTime<Utc>>

Implementations

impl CredentialBuilder

pub fn new() -> Self

Create a new empty credential builder.

pub fn issuer(self, issuer: &str) -> Self

Set the issuer DID.

pub fn subject(self, subject_did: &str) -> Self

Set the subject DID.

pub fn credential_type(self, cred_type: AgentCredentialType) -> Self

Set the credential type.

pub fn claim(self, key: &str, value: Value) -> Self

Add a claim to the credential subject.

pub fn expiration(self, expires: DateTime<Utc>) -> Self

Set the expiration date.

pub fn build(self) -> Result<VerifiableCredential, CredentialError>

Build the Verifiable Credential.

Returns Err if required fields (issuer, subject) are missing.

Trait Implementations

impl Default for CredentialBuilder

fn default() -> Self

Returns the “default value” for a type.