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

Simple read-only externalities for any backend.

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

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

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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§

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

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

Formats the value using the given formatter. Read more
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impl<'a, H: Hasher, B: 'a + Backend<H>> ExtensionStore for ReadOnlyExternalities<'a, H, B>

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

Register extension extension with specified type_id. Read more
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fn deregister_extension_by_type_id( &mut self, _type_id: TypeId ) -> Result<(), Error>

Deregister extension with specified ‘type_id’ and drop it. Read more
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impl<'a, H: Hasher, B: 'a + Backend<H>> Externalities for ReadOnlyExternalities<'a, H, B>where H::Out: Encode,

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

Write a key value pair to the offchain storage database.
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fn storage(&self, key: &[u8]) -> Option<StorageValue>

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

Get storage value hash. Read more
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fn child_storage( &self, child_info: &ChildInfo, key: &[u8] ) -> Option<StorageValue>

Read child runtime storage. Read more
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fn child_storage_hash( &self, child_info: &ChildInfo, key: &[u8] ) -> Option<Vec<u8>>

Get child storage value hash. Read more
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fn next_storage_key(&self, key: &[u8]) -> Option<StorageKey>

Returns the key immediately following the given key, if it exists.
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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.
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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).
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fn place_child_storage( &mut self, _child_info: &ChildInfo, _key: StorageKey, _value: Option<StorageValue> )

Set or clear a child storage entry.
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fn kill_child_storage( &mut self, _child_info: &ChildInfo, _maybe_limit: Option<u32>, _maybe_cursor: Option<&[u8]> ) -> MultiRemovalResults

Clear an entire child storage. Read more
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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. Read more
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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. Read more
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fn storage_append(&mut self, _key: Vec<u8>, _value: Vec<u8>)

Append storage item. Read more
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fn storage_root(&mut self, _state_version: StateVersion) -> Vec<u8>

Get the trie root of the current storage map. Read more
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fn child_storage_root( &mut self, _child_info: &ChildInfo, _state_version: StateVersion ) -> Vec<u8>

Get the trie root of a child storage map. Read more
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fn storage_start_transaction(&mut self)

Start a new nested transaction. Read more
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fn storage_rollback_transaction(&mut self) -> Result<(), ()>

Rollback the last transaction started by storage_start_transaction. Read more
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fn storage_commit_transaction(&mut self) -> Result<(), ()>

Commit the last transaction started by storage_start_transaction. Read more
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fn wipe(&mut self)

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Benchmarking related functionality and shouldn’t be used anywhere else! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Read more
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fn commit(&mut self)

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Benchmarking related functionality and shouldn’t be used anywhere else! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Read more
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fn read_write_count(&self) -> (u32, u32, u32, u32)

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Benchmarking related functionality and shouldn’t be used anywhere else! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Read more
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fn reset_read_write_count(&mut self)

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Benchmarking related functionality and shouldn’t be used anywhere else! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Read more
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fn get_whitelist(&self) -> Vec<TrackedStorageKey>

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Benchmarking related functionality and shouldn’t be used anywhere else! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Read more
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fn set_whitelist(&mut self, _: Vec<TrackedStorageKey>)

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Benchmarking related functionality and shouldn’t be used anywhere else! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Read more
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fn get_read_and_written_keys(&self) -> Vec<(Vec<u8>, u32, u32, bool)>

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Benchmarking related functionality and shouldn’t be used anywhere else! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Read more
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fn set_storage(&mut self, key: Vec<u8, Global>, value: Vec<u8, Global>)

Set storage entry key of current contract being called (effective immediately).
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fn set_child_storage( &mut self, child_info: &ChildInfo, key: Vec<u8, Global>, value: Vec<u8, Global> )

Set child storage entry key of current contract being called (effective immediately).
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fn clear_storage(&mut self, key: &[u8])

Clear a storage entry (key) of current contract being called (effective immediately).
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fn clear_child_storage(&mut self, child_info: &ChildInfo, key: &[u8])

Clear a child storage entry (key) of current contract being called (effective immediately).
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fn exists_storage(&self, key: &[u8]) -> bool

Whether a storage entry exists.
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fn exists_child_storage(&self, child_info: &ChildInfo, key: &[u8]) -> bool

Whether a child storage entry exists.
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fn storage_index_transaction(&mut self, _index: u32, _hash: &[u8], _size: u32)

Index specified transaction slice and store it.
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fn storage_renew_transaction_index(&mut self, _index: u32, _hash: &[u8])

Renew existing piece of transaction storage.
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fn proof_size(&self) -> Option<u32>

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Benchmarking related functionality and shouldn’t be used anywhere else! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Read more
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impl<'a, H: Hasher, B: 'a + Backend<H>> From<&'a B> for ReadOnlyExternalities<'a, H, B>

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

Converts to this type from the input type.

Auto Trait Implementations§

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impl<'a, H, B> RefUnwindSafe for ReadOnlyExternalities<'a, H, B>where B: RefUnwindSafe, H: RefUnwindSafe,

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impl<'a, H, B> Send for ReadOnlyExternalities<'a, H, B>where B: Sync,

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impl<'a, H, B> Sync for ReadOnlyExternalities<'a, H, B>where B: Sync,

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impl<'a, H, B> Unpin for ReadOnlyExternalities<'a, H, B>where H: Unpin,

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impl<'a, H, B> UnwindSafe for ReadOnlyExternalities<'a, H, B>where B: RefUnwindSafe, H: UnwindSafe,

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for Twhere U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, Outer> IsWrappedBy<Outer> for Twhere Outer: AsRef<T> + AsMut<T> + From<T>, T: From<Outer>,

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fn from_ref(outer: &Outer) -> &T

Get a reference to the inner from the outer.

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fn from_mut(outer: &mut Outer) -> &mut T

Get a mutable reference to the inner from the outer.

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impl<T> Pointable for T

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const ALIGN: usize = mem::align_of::<T>()

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> Same<T> for T

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type Output = T

Should always be Self
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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<S, T> UncheckedInto<T> for Swhere T: UncheckedFrom<S>,

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fn unchecked_into(self) -> T

The counterpart to unchecked_from.
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impl<V, T> VZip<V> for Twhere V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<T> JsonSchemaMaybe for T

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impl<T> MaybeDebug for Twhere T: Debug,

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impl<T> MaybeRefUnwindSafe for Twhere T: RefUnwindSafe,