Struct fuel_vm::storage::MemoryStorage

pub struct MemoryStorage { /* private fields */ }

In-memory storage implementation for the interpreter.

It tracks 3 states:

• memory: the transactions will be applied to this state.
• transacted: will receive the committed memory state.
• persisted: will receive the persisted transacted state.

Implementations

impl MemoryStorage

pub fn new(block_height: u32, coinbase: Address) -> Self

Create a new memory storage.

pub fn contract_state(
    &self,
    contract: &ContractId,
    key: &Bytes32
) -> Cow<'_, Bytes32>

Fetch a mapping from the contract state.

pub fn commit(&mut self)

Set the transacted state to the memory state.

pub fn revert(&mut self)

Revert the memory state to the transacted state.

pub fn rollback(&mut self)

Revert the memory and transacted changes to the persisted state.

pub fn persist(&mut self)

Persist the changes from transacted to memory+persisted state.

Trait Implementations

impl<'a> AsMut<MemoryStorage> for MemoryClient<'a>

fn as_mut(&mut self) -> &mut MemoryStorage

Converts this type into a mutable reference of the (usually inferred) input type.

impl<'a> AsRef<MemoryStorage> for MemoryClient<'a>

fn as_ref(&self) -> &MemoryStorage

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for MemoryStorage

fn clone(&self) -> MemoryStorage

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MemoryStorage

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

Formats the value using the given formatter.

impl Default for MemoryStorage

fn default() -> Self

Returns the “default value” for a type.

impl<'a> From<MemoryStorage> for MemoryClient<'a>

fn from(s: MemoryStorage) -> Self

Converts to this type from the input type.

impl InterpreterStorage for MemoryStorage

type DataError = Infallible

Error implementation for reasons unspecified in the protocol.

fn block_height(&self) -> Result<u32, Infallible>

Provide the current block height in which the transactions should be executed.

fn timestamp(&self, height: u32) -> Result<Word, Self::DataError>

Return the timestamp of a given block

fn block_hash(&self, block_height: u32) -> Result<Bytes32, Infallible>

Provide the block hash from a given height.

fn coinbase(&self) -> Result<Address, Infallible>

Provide the coinbase address for the VM instructions implementation.

fn storage_contract(
    &self,
    id: &ContractId
) -> Result<Option<Cow<'_, Contract>>, Self::DataError>

Fetch a previously inserted contract code from the chain state for a given contract.

fn storage_contract_insert(
    &mut self,
    id: &ContractId,
    contract: &Contract
) -> Result<Option<Contract>, Self::DataError>

Append a contract to the chain, provided its identifier.

fn storage_contract_exists(
    &self,
    id: &ContractId
) -> Result<bool, Self::DataError>

Check if a provided contract exists in the chain.

fn storage_contract_root(
    &self,
    id: &ContractId
) -> Result<Option<Cow<'_, (Salt, Bytes32)>>, Self::DataError>

Fetch a previously inserted salt+root tuple from the chain state for a given contract.

fn storage_contract_root_insert(
    &mut self,
    id: &ContractId,
    salt: &Salt,
    root: &Bytes32
) -> Result<Option<(Salt, Bytes32)>, Self::DataError>

Append the salt+root of a contract that was appended to the chain.

fn merkle_contract_state(
    &self,
    id: &ContractId,
    key: &Bytes32
) -> Result<Option<Cow<'_, Bytes32>>, Self::DataError>

Fetch the value form a key-value mapping in a contract storage.

fn merkle_contract_state_insert(
    &mut self,
    contract: &ContractId,
    key: &Bytes32,
    value: &Bytes32
) -> Result<Option<Bytes32>, Self::DataError>

Insert a key-value mapping in a contract storage.

fn merkle_contract_asset_id_balance(
    &self,
    id: &ContractId,
    asset_id: &AssetId
) -> Result<Option<Word>, Self::DataError>

Fetch the balance of an asset ID in a contract storage.

fn merkle_contract_asset_id_balance_insert(
    &mut self,
    contract: &ContractId,
    asset_id: &AssetId,
    value: Word
) -> Result<Option<Word>, Self::DataError>

Update the balance of an asset ID in a contract storage.

impl MerkleStorage<ContractId, AssetId, u64> for MemoryStorage

type Error = Infallible

Error implementation of the merkle storage functions

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

Append P->K->V mapping to the storage.

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

Retrieve Cow<V> such as P->K->V.

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

Remove P->K->V mapping from the storage.

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

Return true if there is a P->K mapping to a value in the storage.

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

Return the merkle root of the domain of P.

impl MerkleStorage<ContractId, Bytes32, Bytes32> for MemoryStorage

type Error = Infallible

Error implementation of the merkle storage functions

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

Append P->K->V mapping to the storage.

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

Retrieve Cow<V> such as P->K->V.

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

Remove P->K->V mapping from the storage.

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

Return true if there is a P->K mapping to a value in the storage.

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

Return the merkle root of the domain of P.

impl Storage<ContractId, (Salt, Bytes32)> for MemoryStorage

type Error = Infallible

Error implementation of the storage functions

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

Append K->V mapping to the storage.

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

Remove K->V mapping from the storage.

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

Retrieve Cow<V> such as K->V.

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

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

impl Storage<ContractId, Contract> for MemoryStorage

type Error = Infallible

Error implementation of the storage functions

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

Append K->V mapping to the storage.

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

Remove K->V mapping from the storage.

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

Retrieve Cow<V> such as K->V.

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

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