Struct CostTrackingCallback 

pub struct CostTrackingCallback { /* private fields */ }

Callback handler that tracks token usage and estimated cost across model calls.

Supports per-model pricing tables and optional budget limits. Query the accumulated snapshot via snapshot().

Implementations

impl CostTrackingCallback

pub fn new(pricing: HashMap<String, ModelPricing>) -> Self

Create a new cost tracker with the given pricing table.

pub fn with_budget(self, limit_usd: f64) -> Self

Set a budget limit in USD. Returns error via callback when exceeded.

pub async fn set_model(&self, model_name: &str)

Set the current model name for cost attribution.

pub async fn record_usage(&self, usage: &TokenUsage)

Record token usage from a model response.

pub async fn snapshot(&self) -> UsageSnapshot

Get a snapshot of accumulated usage and costs.

pub async fn is_over_budget(&self) -> bool

Check if the budget has been exceeded.

Trait Implementations

impl CallbackHandler for CostTrackingCallback

fn on_event<'life0, 'async_trait>( &'life0 self, event: RunEvent, ) -> Pin<Box<dyn Future<Output = Result<(), SynapticError>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,