fuel_vm::storage

Struct ContractsState

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pub struct ContractsState;
Expand description

The storage table for contract’s hashed key-value state.

Lifetime is for optimization to avoid clone.

Trait Implementations§

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impl Mappable for ContractsState

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type OwnedKey = ContractsStateKey

The table key is combination of the ContractId and Bytes32 hash of the value’s key.

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type Key = <ContractsState as Mappable>::OwnedKey

The key type is used during interaction with the storage. In most cases, it is the same as Self::OwnedKey.
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type OwnedValue = ContractsStateData

The owned type of the Value retrieving from the storage.
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type Value = [u8]

The value type is used while setting the value to the storage. In most cases, it is the same as Self::OwnedValue, but it is without restriction and can be used for performance optimizations.
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impl<D> StorageRead<ContractsState> for PredicateStorage<D>

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fn read( &self, _key: &<ContractsState as Mappable>::Key, _buf: &mut [u8], ) -> Result<Option<usize>, Self::Error>

Read the value stored at the given key into the provided buffer if the value exists. Read more
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fn read_alloc( &self, _key: &<ContractsState as Mappable>::Key, ) -> Result<Option<Vec<u8>>, Self::Error>

Same as read but allocates a new buffer and returns it. Read more
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impl<D> StorageSize<ContractsState> for PredicateStorage<D>

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fn size_of_value( &self, _key: &<ContractsState as Mappable>::Key, ) -> Result<Option<usize>, Self::Error>

Return the number of bytes stored at this key.
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impl<D> StorageWrite<ContractsState> for PredicateStorage<D>

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fn write_bytes( &mut self, _key: &<ContractsState as Mappable>::Key, _buf: &[u8], ) -> Result<usize, Self::Error>

Write the bytes to the given key from the provided buffer. Read more
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fn replace_bytes( &mut self, _key: &<ContractsState as Mappable>::Key, _buf: &[u8], ) -> Result<(usize, Option<Vec<u8>>), Self::Error>

Write the bytes to the given key from the provided buffer and return the previous bytes if it existed. Read more
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fn take_bytes( &mut self, _key: &<ContractsState as Mappable>::Key, ) -> Result<Option<Vec<u8>>, Self::Error>

Removes a bytes from the storage and returning it without deserializing it.

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where 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 T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
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fn borrow_mut(&mut self) -> &mut T

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fn conv<T>(self) -> T
where Self: Into<T>,

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where Self: Binary,

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where Self: Display,

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where Self: LowerExp,

Causes self to use its LowerExp implementation when Debug-formatted.
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fn fmt_lower_hex(self) -> FmtLowerHex<Self>
where Self: LowerHex,

Causes self to use its LowerHex implementation when Debug-formatted.
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where Self: Octal,

Causes self to use its Octal implementation when Debug-formatted.
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fn fmt_pointer(self) -> FmtPointer<Self>
where Self: Pointer,

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where Self: UpperExp,

Causes self to use its UpperExp implementation when Debug-formatted.
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where Self: UpperHex,

Causes self to use its UpperHex implementation when Debug-formatted.
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where &'a Self: for<'a> IntoIterator,

Formats each item in a sequence. Read more
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fn from(t: T) -> T

Returns the argument unchanged.

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where U: From<T>,

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Calls U::from(self).

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

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Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn pipe<R>(self, func: impl FnOnce(Self) -> R) -> R
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Pipes by value. This is generally the method you want to use. Read more
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fn pipe_ref<'a, R>(&'a self, func: impl FnOnce(&'a Self) -> R) -> R
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Borrows self and passes that borrow into the pipe function. Read more
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where Self: BorrowMut<B>, B: 'a + ?Sized, R: 'a,

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impl<T> Same for T

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type Output = T

Should always be Self
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fn storage<Type>(&mut self) -> StorageMut<'_, Self, Type>
where Type: Mappable,

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fn storage_as_mut<Type>(&mut self) -> StorageMut<'_, Self, Type>
where Type: Mappable,

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impl<T> StorageAsRef for T

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fn storage<Type>(&self) -> StorageRef<'_, Self, Type>
where Type: Mappable,

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where Type: Mappable,

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fn tap(self, func: impl FnOnce(&Self)) -> Self

Immutable access to a value. Read more
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Mutable access to a value. Read more
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where Self: DerefMut<Target = T> + Deref, T: ?Sized,

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Calls .tap() only in debug builds, and is erased in release builds.
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Calls .tap_borrow_mut() only in debug builds, and is erased in release builds.
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fn tap_ref_mut_dbg<R>(self, func: impl FnOnce(&mut R)) -> Self
where Self: AsMut<R>, R: ?Sized,

Calls .tap_ref_mut() only in debug builds, and is erased in release builds.
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fn tap_deref_dbg<T>(self, func: impl FnOnce(&T)) -> Self
where Self: Deref<Target = T>, T: ?Sized,

Calls .tap_deref() only in debug builds, and is erased in release builds.
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fn tap_deref_mut_dbg<T>(self, func: impl FnOnce(&mut T)) -> Self
where Self: DerefMut<Target = T> + Deref, T: ?Sized,

Calls .tap_deref_mut() only in debug builds, and is erased in release builds.
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where Self: TryInto<T>,

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Performs the conversion.
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