Struct UcanPayload 

pub struct UcanPayload {
    pub iss: String,
    pub aud: String,
    pub sub: String,
    pub cmd: String,
    pub args: UcanCapability,
    pub nonce: String,
    pub exp: i64,
    pub prf: Vec<String>,
}

UCAN payload — the middle segment of the JWT compact form.

Spec §5.1: full canonical “A→B delegates read-only Patient/X access” example. prf carries parent UCAN(s) inline so verification stays self-contained (no out-of-band fetches).

Fields

iss: String

Issuer DID (the principal granting authority).

aud: String

Audience DID (the principal authorised to act).

sub: String

Subject DID — the resource owner / root authority.

cmd: String

Reserved namespace sentinel; must be "atd-cap" for ATD-bound tokens. Cross-system replay (e.g. a Bluesky UCAN) is structurally prevented by this discriminator (spec §4.5).

args: UcanCapability

Capabilities + optional resource bindings.

nonce: String

16-byte random nonce (base64url-encoded).

exp: i64

Unix-seconds expiry. Verified against SystemTime::now() at chain-walk time (Phase B.2).

prf: Vec<String>

Parent UCANs (each itself a JWT compact form). Forms the delegation chain. Empty for root UCANs signed by the resource owner.

Trait Implementations

impl Clone for UcanPayload

fn clone(&self) -> UcanPayload

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UcanPayload

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for UcanPayload

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for UcanPayload

fn eq(&self, other: &UcanPayload) -> 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 Serialize for UcanPayload

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for UcanPayload

impl StructuralPartialEq for UcanPayload