Struct WebhookNotifier 

pub struct WebhookNotifier { /* private fields */ }

Builds outbound webhook payloads and signatures.

The notifier is stateless with respect to HTTP transport — it only builds the JSON body and HMAC-SHA256 signature. Callers are responsible for actually sending the HTTP POST (e.g. using reqwest or hyper).

Implementations

impl WebhookNotifier

pub fn new(config: WebhookConfig) -> Self

Create a new notifier with the given configuration.

pub fn config(&self) -> &WebhookConfig

Returns a reference to the underlying configuration.

pub fn build_payload( &self, event: &WebhookEvent, context: &WorkflowContext, ) -> String

Build the JSON payload string for the given event and context.

The payload is a JSON object with the following fields:

• event_type: dot-separated event name (see WebhookEvent::event_type)
• workflow_id: from context.workflow_id
• workflow_name: from context.workflow_name
• state: from context.state
• timestamp_ms: Unix epoch in milliseconds
• variables: from context.variables
• step_name (optional): only present for step-level events

pub fn compute_signature(&self, payload: &str) -> Option<String>

Compute HMAC-SHA256 of payload using the configured secret.

Returns None when no secret is configured, or Some(hex_string) (64 lowercase hex characters) when a secret is set.

pub fn should_notify(&self, event: &WebhookEvent) -> bool

Returns true when the notifier is configured to send a notification for the given event.

Matching is done by event type string so that, for example, any StepCompleted { .. } event matches a StepCompleted { step_name: _ } entry.

pub fn build_headers(&self, payload: &str) -> HashMap<String, String>

Build an HTTP headers map for a notification.

Always includes:

• Content-Type: application/json

When a secret is configured, also includes:

• X-Hub-Signature-256: <hex-digest>

Trait Implementations

impl Clone for WebhookNotifier

fn clone(&self) -> WebhookNotifier

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for WebhookNotifier

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

Formats the value using the given formatter.