Struct A2AServer 

pub struct A2AServer { /* private fields */ }

handle_a2a_request() and get_agent_card() that you can call from any HTTP framework’s route handler.

Tasks are stored in-memory so that tasks/get can retrieve them and tasks/cancel can transition their status. When the task store exceeds max_tasks, the oldest completed/failed/cancelled tasks are evicted first.

Implementations

impl A2AServer

pub fn new(chain: Arc<dyn BaseChain>) -> Self

Create a new A2A server backed by a BaseChain.

pub fn with_max_tasks(self, max: usize) -> Self

Set the maximum number of tasks before LRU eviction.

pub fn with_card(self, card: AgentCard) -> Self

Set a custom agent card.

pub fn get_agent_card(&self) -> &AgentCard

Get the agent card (for GET /.well-known/agent.json).

pub async fn handle_a2a_request(&self, req: A2ARequest) -> A2AResponse

Handle an incoming A2A request (for POST /).

Dispatches based on the request method:

• tasks/send -> invoke the chain and return a task result
• tasks/get -> return a stored task
• tasks/cancel -> cancel a stored task
• unknown method -> method_not_found error