Struct SpanMetadata 

pub struct SpanMetadata {
    pub model: Option<String>,
    pub provider: Option<String>,
    pub tokens_in: Option<u32>,
    pub tokens_out: Option<u32>,
    pub total_tokens: Option<u32>,
    pub tool_name: Option<String>,
    pub extra: HashMap<String, Value>,
}

Type-specific metadata for spans

Fields

model: Option<String>

Model name for LLM generations (e.g., “gpt-4o”)

provider: Option<String>

Provider name (e.g., “openai”)

tokens_in: Option<u32>

Input token count

tokens_out: Option<u32>

Output token count

total_tokens: Option<u32>

Total token count

tool_name: Option<String>

Tool name for tool call spans

extra: HashMap<String, Value>

Custom key-value metadata

Trait Implementations

impl Clone for SpanMetadata

fn clone(&self) -> SpanMetadata

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SpanMetadata

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

Formats the value using the given formatter.

impl Default for SpanMetadata

fn default() -> SpanMetadata

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for SpanMetadata

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for SpanMetadata

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

where __S: Serializer,

Serialize this value into the given Serde serializer.