Struct fuel_vm::storage::ContractsState

pub struct ContractsState<'a>(_);

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

Lifetime is for optimization to avoid clone.

Trait Implementations

impl<'a> Mappable for ContractsState<'a>

type Key = (&'a ContractId, &'a Bytes32)

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

type SetValue = Bytes32

The table value is hash of the value.

type GetValue = <ContractsState<'a> as Mappable>::SetValue

The value type is used while getting the value from the storage.

impl MerkleRootStorage<ContractId, ContractsState<'_>> for MemoryStorage

fn root(&mut self, parent: &ContractId) -> Result<MerkleRoot, Infallible>

Return the merkle root of the stored Type in the storage.

impl StorageInspect<ContractsState<'_>> for MemoryStorage

type Error = Infallible

fn get(
    &self,
    key: &(&ContractId, &Bytes32)
) -> Result<Option<Cow<'_, Bytes32>>, Infallible>

Retrieve Cow<Value> such as Key->Value.

fn contains_key(&self, key: &(&ContractId, &Bytes32)) -> Result<bool, Infallible>

Return true if there is a Key mapping to a value in the storage.

impl StorageMutate<ContractsState<'_>> for MemoryStorage

fn insert(
    &mut self,
    key: &(&ContractId, &Bytes32),
    value: &Bytes32
) -> Result<Option<Bytes32>, Infallible>

Append Key->Value mapping to the storage.

fn remove(
    &mut self,
    key: &(&ContractId, &Bytes32)
) -> Result<Option<Bytes32>, Infallible>

Remove Key->Value mapping from the storage.