Struct sp_state_machine::ReadOnlyExternalities

pub struct ReadOnlyExternalities<'a, H: Hasher, B: 'a + Backend<H>> { /* private fields */ }

Simple read-only externalities for any backend.

To be used in test for state inspection. Will panic if something writes to the storage.

Implementations

impl<'a, H: Hasher, B: 'a + Backend<H>> ReadOnlyExternalities<'a, H, B>where H::Out: Encode,

pub fn execute_with<R>(&mut self, f: impl FnOnce() -> R) -> R

Execute the given closure while self is set as externalities.

Returns the result of the given closure.

Trait Implementations

impl<'a, H: Debug + Hasher, B: Debug + 'a + Backend<H>> Debug for ReadOnlyExternalities<'a, H, B>

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

Formats the value using the given formatter.

impl<'a, H: Hasher, B: 'a + Backend<H>> ExtensionStore for ReadOnlyExternalities<'a, H, B>

fn extension_by_type_id(&mut self, _type_id: TypeId) -> Option<&mut dyn Any>

Tries to find a registered extension by the given type_id and returns it as a &mut dyn Any.

fn register_extension_with_type_id( &mut self, _type_id: TypeId, _extension: Box<dyn Extension> ) -> Result<(), Error>

Register extension extension with specified type_id.

fn deregister_extension_by_type_id( &mut self, _type_id: TypeId ) -> Result<(), Error>

Deregister extension with specified ‘type_id’ and drop it.

impl<'a, H: Hasher, B: 'a + Backend<H>> Externalities for ReadOnlyExternalities<'a, H, B>where H::Out: Encode,

fn set_offchain_storage(&mut self, _key: &[u8], _value: Option<&[u8]>)

Write a key value pair to the offchain storage database.

fn storage(&self, key: &[u8]) -> Option<StorageValue>

Read runtime storage.

fn storage_hash(&self, key: &[u8]) -> Option<Vec<u8>>

Get storage value hash.

fn child_storage( &self, child_info: &ChildInfo, key: &[u8] ) -> Option<StorageValue>

Read child runtime storage.

fn child_storage_hash( &self, child_info: &ChildInfo, key: &[u8] ) -> Option<Vec<u8>>

Get child storage value hash.

fn next_storage_key(&self, key: &[u8]) -> Option<StorageKey>

Returns the key immediately following the given key, if it exists.

fn next_child_storage_key( &self, child_info: &ChildInfo, key: &[u8] ) -> Option<StorageKey>

Returns the key immediately following the given key, if it exists, in child storage.

fn place_storage( &mut self, _key: StorageKey, _maybe_value: Option<StorageValue> )

Set or clear a storage entry (key) of current contract being called (effective immediately).

fn place_child_storage( &mut self, _child_info: &ChildInfo, _key: StorageKey, _value: Option<StorageValue> )

Set or clear a child storage entry.

fn kill_child_storage( &mut self, _child_info: &ChildInfo, _maybe_limit: Option<u32>, _maybe_cursor: Option<&[u8]> ) -> MultiRemovalResults

Clear an entire child storage.

fn clear_prefix( &mut self, _prefix: &[u8], _maybe_limit: Option<u32>, _maybe_cursor: Option<&[u8]> ) -> MultiRemovalResults

Clear storage entries which keys are start with the given prefix.

fn clear_child_prefix( &mut self, _child_info: &ChildInfo, _prefix: &[u8], _maybe_limit: Option<u32>, _maybe_cursor: Option<&[u8]> ) -> MultiRemovalResults

Clear child storage entries which keys are start with the given prefix.

fn storage_append(&mut self, _key: Vec<u8>, _value: Vec<u8>)

Append storage item.

fn storage_root(&mut self, _state_version: StateVersion) -> Vec<u8>

Get the trie root of the current storage map.

fn child_storage_root( &mut self, _child_info: &ChildInfo, _state_version: StateVersion ) -> Vec<u8>

Get the trie root of a child storage map.

fn storage_start_transaction(&mut self)

Start a new nested transaction.

fn storage_rollback_transaction(&mut self) -> Result<(), ()>

Rollback the last transaction started by storage_start_transaction.

fn storage_commit_transaction(&mut self) -> Result<(), ()>

Commit the last transaction started by storage_start_transaction.

fn wipe(&mut self)

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Benchmarking related functionality and shouldn’t be used anywhere else! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

fn commit(&mut self)

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Benchmarking related functionality and shouldn’t be used anywhere else! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

fn read_write_count(&self) -> (u32, u32, u32, u32)

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Benchmarking related functionality and shouldn’t be used anywhere else! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

fn reset_read_write_count(&mut self)

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Benchmarking related functionality and shouldn’t be used anywhere else! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

fn get_whitelist(&self) -> Vec<TrackedStorageKey>

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Benchmarking related functionality and shouldn’t be used anywhere else! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

fn set_whitelist(&mut self, _: Vec<TrackedStorageKey>)

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Benchmarking related functionality and shouldn’t be used anywhere else! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

fn get_read_and_written_keys(&self) -> Vec<(Vec<u8>, u32, u32, bool)>

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Benchmarking related functionality and shouldn’t be used anywhere else! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

fn set_storage(&mut self, key: Vec<u8>, value: Vec<u8>)

Set storage entry key of current contract being called (effective immediately).

fn set_child_storage( &mut self, child_info: &ChildInfo, key: Vec<u8>, value: Vec<u8> )

Set child storage entry key of current contract being called (effective immediately).

fn clear_storage(&mut self, key: &[u8])

Clear a storage entry (key) of current contract being called (effective immediately).

fn clear_child_storage(&mut self, child_info: &ChildInfo, key: &[u8])

Clear a child storage entry (key) of current contract being called (effective immediately).

fn exists_storage(&self, key: &[u8]) -> bool

Whether a storage entry exists.

fn exists_child_storage(&self, child_info: &ChildInfo, key: &[u8]) -> bool

Whether a child storage entry exists.

fn storage_index_transaction(&mut self, _index: u32, _hash: &[u8], _size: u32)

Index specified transaction slice and store it.

fn storage_renew_transaction_index(&mut self, _index: u32, _hash: &[u8])

Renew existing piece of transaction storage.

fn proof_size(&self) -> Option<u32>

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Benchmarking related functionality and shouldn’t be used anywhere else! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

impl<'a, H: Hasher, B: 'a + Backend<H>> From<&'a B> for ReadOnlyExternalities<'a, H, B>

fn from(backend: &'a B) -> Self

Converts to this type from the input type.