Struct DelegateCtx 

pub struct DelegateCtx { /* private fields */ }

Opaque handle to the delegate’s execution environment.

Provides access to both:

• Temporary context: State shared within a single message batch (reset between calls)
• Persistent secrets: Encrypted storage that survives across all invocations

Context Methods

• read, write, len, clear

Secret Methods

• get_secret, set_secret, has_secret, remove_secret

Implementations

impl DelegateCtx

pub fn len(&self) -> usize

Returns the current context length in bytes.

pub fn is_empty(&self) -> bool

Returns true if the context is empty.

pub fn read(&self) -> Vec<u8>

Read the current context bytes.

Returns an empty Vec if no context has been written.

pub fn read_into(&self, buf: &mut [u8]) -> usize

Read context into a provided buffer.

Returns the number of bytes actually read.

pub fn write(&mut self, data: &[u8]) -> bool

Write new context bytes, replacing any existing content.

Returns true on success, false on error.

pub fn clear(&mut self)

Clear the context.

pub fn get_secret_len(&self, key: &[u8]) -> Option<usize>

Get the length of a secret without retrieving its value.

Returns None if the secret does not exist.

pub fn get_secret(&self, key: &[u8]) -> Option<Vec<u8>>

Get a secret by key.

Returns None if the secret does not exist.

pub fn set_secret(&mut self, key: &[u8], value: &[u8]) -> bool

Store a secret.

Returns true on success, false on error.

pub fn has_secret(&self, key: &[u8]) -> bool

Check if a secret exists.

pub fn remove_secret(&mut self, key: &[u8]) -> bool

Remove a secret.

Returns true if the secret was removed, false if it didn’t exist.

Trait Implementations

impl Debug for DelegateCtx

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

Formats the value using the given formatter.

impl Default for DelegateCtx

fn default() -> DelegateCtx

Returns the “default value” for a type.