Struct sp_state_machine::Ext

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

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

pub fn new(
    overlay: &'a mut OverlayedChanges,
    offchain_overlay: &'a mut OffchainOverlayedChanges,
    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

pub fn get_offchain_storage_changes(&self) -> &OffchainOverlayedChanges

Read only accessor for the scheduled overlay changes.

Trait Implementations

impl<'a, H, B, N> 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 speciifed 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, B, N> Externalities for Ext<'a, H, N, B> where
    H: Hasher,
    H::Out: Ord + 'static + Codec,
    B: 'a + 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)

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 chain_id(&self) -> u64

Get the identity of the chain.

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 set_whitelist(&mut self, new: Vec<Vec<u8>>)

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