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SealContext

cratestack::envelope_layer

Struct SealContext 

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pub struct SealContext(/* private fields */);
Expand description

Opaque per-request state an envelope passes from open_request to the seal_response of the same request (API-review decision, 2026-09-26).

The layer never looks inside: it only carries it. A composite envelope (cratestack#1078) records which framing opened the request, so that a Mac0 request is answered with Mac0 and a Sign1 one with Sign1; a single-framing envelope such as CoseEnvelope needs nothing and leaves it empty.

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impl SealContext

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pub fn empty() -> SealContext

No context: what a single-framing envelope returns, and what the layer passes when sealing the response to an unsigned request.

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pub fn new<T>(value: T) -> SealContext
where T: Any + Send + Sync,

Carry value.

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pub fn get<T>(&self) -> Option<&T>
where T: Any,

The value, if it is a T.

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pub fn is_empty(&self) -> bool

Whether this is empty.

Trait Implementations§

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impl Clone for SealContext

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fn clone(&self) -> SealContext

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for SealContext

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

Formats the value using the given formatter. Read more
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impl Default for SealContext

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fn default() -> SealContext

Returns the “default value” for a type. Read more

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