Struct StateChange 

#[non_exhaustive]
pub struct StateChange {
    pub changed: HashMap<Id, HashMap<String, State>>,
    pub extra: Map<String, Value>,
}

A state change push notification (RFC 8620 §7.1).

Sent over both SSE (as a push event) and WebSocket (as a frame type).

extra equality is feature-flag-dependent (bd:JMAP-6r7c.43)

The derived PartialEq / Eq impl’s behaviour on the extra field depends on the global serde_json/preserve_order feature flag — see the crate-level note for the canonical statement.

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

changed: HashMap<Id, HashMap<String, State>>

For each account that changed: maps data-type name to the new State token.

Outer key: account Id. Inner key: JMAP data-type name (e.g. "Email"). Inner value: new opaque state string; pass to Email/changes etc. as sinceState.

extra: Map<String, Value>

Catch-all for vendor / site / private extension fields not covered by the typed fields above. Preserves unknown fields across deserialize/serialize round-trip per workspace extras-preservation policy (see workspace AGENTS.md).

Trait Implementations

impl Clone for StateChange

fn clone(&self) -> StateChange

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for StateChange

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for StateChange

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for StateChange

impl PartialEq for StateChange

fn eq(&self, other: &StateChange) -> 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 StateChange

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for StateChange