Struct PolicyStack 

pub struct PolicyStack { /* private fields */ }

Ordered list of policies applied to every contract call.

Policies run on_request in insertion order and on_response in reverse order (like middleware stacks).

Implementations

impl PolicyStack

pub fn new() -> PolicyStack

Create an empty policy stack.

pub fn push(&mut self, policy: Arc<dyn Policy>)

Append a policy to the end of the stack.

pub async fn execute<F, Fut, T, E>( &self, ctx: &PolicyContext, f: F, map_policy_err: fn(ContractError) -> E, ) -> Result<T, E>

where F: FnOnce() -> Fut, Fut: Future<Output = Result<T, E>>,

Execute a contract call through the policy stack.

1. Runs on_request for each policy in order.
2. Invokes the transport closure f.
3. Runs on_response for each policy in reverse order.

Errors

Returns the first error from any policy hook, or the transport error if the call itself fails.

Trait Implementations

impl Default for PolicyStack

fn default() -> PolicyStack

Returns the “default value” for a type.