Trait frame::runtime::apis::ApiExt

pub trait ApiExt<Block>where
    Block: Block,{
    // Required methods
    fn execute_in_transaction<F, R>(&self, call: F) -> R
       where F: FnOnce(&Self) -> TransactionOutcome<R>,
             Self: Sized;
    fn has_api<A>(
        &self,
        at_hash: <Block as Block>::Hash
    ) -> Result<bool, ApiError>
       where A: RuntimeApiInfo + ?Sized,
             Self: Sized;
    fn has_api_with<A, P>(
        &self,
        at_hash: <Block as Block>::Hash,
        pred: P
    ) -> Result<bool, ApiError>
       where A: RuntimeApiInfo + ?Sized,
             P: Fn(u32) -> bool,
             Self: Sized;
    fn api_version<A>(
        &self,
        at_hash: <Block as Block>::Hash
    ) -> Result<Option<u32>, ApiError>
       where A: RuntimeApiInfo + ?Sized,
             Self: Sized;
    fn record_proof(&mut self);
    fn extract_proof(&mut self) -> Option<StorageProof>;
    fn proof_recorder(
        &self
    ) -> Option<Recorder<<<Block as Block>::Header as Header>::Hashing>>;
    fn into_storage_changes<B>(
        &self,
        backend: &B,
        parent_hash: <Block as Block>::Hash
    ) -> Result<StorageChanges<<<Block as Block>::Header as Header>::Hashing>, String>
       where B: Backend<<<Block as Block>::Header as Header>::Hashing>,
             Self: Sized;
    fn set_call_context(&mut self, call_context: CallContext);
    fn register_extension<E>(&mut self, extension: E)
       where E: Extension;
}

Extends the runtime api implementation with some common functionality.

Required Methods

fn execute_in_transaction<F, R>(&self, call: F) -> Rwhere F: FnOnce(&Self) -> TransactionOutcome<R>, Self: Sized,

Execute the given closure inside a new transaction.

Depending on the outcome of the closure, the transaction is committed or rolled-back.

The internal result of the closure is returned afterwards.

fn has_api<A>(&self, at_hash: <Block as Block>::Hash) -> Result<bool, ApiError>where A: RuntimeApiInfo + ?Sized, Self: Sized,

Checks if the given api is implemented and versions match.

fn has_api_with<A, P>( &self, at_hash: <Block as Block>::Hash, pred: P ) -> Result<bool, ApiError>where A: RuntimeApiInfo + ?Sized, P: Fn(u32) -> bool, Self: Sized,

Check if the given api is implemented and the version passes a predicate.

fn api_version<A>( &self, at_hash: <Block as Block>::Hash ) -> Result<Option<u32>, ApiError>where A: RuntimeApiInfo + ?Sized, Self: Sized,

Returns the version of the given api.

fn record_proof(&mut self)

Start recording all accessed trie nodes for generating proofs.

fn extract_proof(&mut self) -> Option<StorageProof>

Extract the recorded proof.

This stops the proof recording.

If record_proof was not called before, this will return None.

fn proof_recorder( &self ) -> Option<Recorder<<<Block as Block>::Header as Header>::Hashing>>

Returns the current active proof recorder.

fn into_storage_changes<B>( &self, backend: &B, parent_hash: <Block as Block>::Hash ) -> Result<StorageChanges<<<Block as Block>::Header as Header>::Hashing>, String>where B: Backend<<<Block as Block>::Header as Header>::Hashing>, Self: Sized,

Convert the api object into the storage changes that were done while executing runtime api functions.

After executing this function, all collected changes are reset.

fn set_call_context(&mut self, call_context: CallContext)

Set the CallContext to be used by the runtime api calls done by this instance.

fn register_extension<E>(&mut self, extension: E)where E: Extension,

Register an Extension that will be accessible while executing a runtime api call.

Implementors