Trait Provider 

pub trait Provider: Send + Sync {
    // Required methods
    fn manifest(&self) -> &ProviderManifest;
    fn open_session<'life0, 'async_trait>(
        &'life0 self,
        opts: OpenSessionOptions,
    ) -> Pin<Box<dyn Future<Output = Result<Box<dyn ProviderSession>, ProviderError>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;
}

A provider: a static capability declaration plus a session factory (spine §4.2 Provider). Providers declare and faithfully execute; they never fold, translate, improvise, retry, or degrade (04 §1).

Required Methods

fn manifest(&self) -> &ProviderManifest

The package-shipped static capability declaration.

fn open_session<'life0, 'async_trait>( &'life0 self, opts: OpenSessionOptions, ) -> Pin<Box<dyn Future<Output = Result<Box<dyn ProviderSession>, ProviderError>> + Send + 'async_trait>>

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

Opens a session. Atomic (04 §2.1): returning means the connection is up, the protocol is negotiated with all requiredFeatures satisfied, the device is selected and connected, the substrate session is started, and attestation matched lockfileDigest. On any failure the provider cleans up partial resources and fails — never a half-open session. Failure classes: negotiation/capability mismatch → capability_drift; device unavailable → action_failed_retryable; connection failure → transport_lost.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl Provider for FakeProvider