Struct Ext 

pub struct Ext<'a, H, N, B>
where
    H: Hasher,
    B: 'a + Backend<H>,
    N: BlockNumber,
{
    pub id: u16,
    /* private fields */
}

Wraps a read-only backend, call executor, and current overlayed changes.

Fields

id: u16

Pseudo-unique id used for tracing.

Implementations

impl<'a, H, N, B> Ext<'a, H, N, B>

where H: Hasher, B: Backend<H>, N: BlockNumber,

pub fn new( overlay: &'a mut OverlayedChanges, storage_transaction_cache: &'a mut StorageTransactionCache<B::Transaction, H, N>, backend: &'a B, changes_trie_state: Option<ChangesTrieState<'a, H, N>>, extensions: Option<&'a mut Extensions>, ) -> Self

Create a new Ext from overlayed changes and read-only backend

Trait Implementations

impl<'a, H, N, B> ExtensionStore for Ext<'a, H, N, B>

where H: Hasher, B: 'a + Backend<H>, N: BlockNumber,

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 speicifed ‘type_id’ and drop it.

impl<'a, H, N, B> Externalities for Ext<'a, H, N, B>

where H: Hasher, H::Out: Ord + 'static + Codec, B: Backend<H>, N: BlockNumber,

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 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 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, 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, limit: Option<u32>, ) -> bool

Clear an entire child storage.

fn clear_prefix(&mut self, prefix: &[u8])

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

fn clear_child_prefix(&mut self, child_info: &ChildInfo, prefix: &[u8])

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) -> Vec<u8>

Get the trie root of the current storage map.

fn child_storage_root(&mut self, child_info: &ChildInfo) -> Vec<u8>

Get the trie root of a child storage map.

fn storage_changes_root( &mut self, parent_hash: &[u8], ) -> Result<Option<Vec<u8>>, ()>

Get the changes trie root of the current storage overlay at a block with given parent.

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, new: Vec<TrackedStorageKey>)

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! 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).