Struct FastCacheDB 

pub struct FastCacheDB<ExtDB> {
    pub accounts: HashMap<Address, FastDbAccount>,
    pub contracts: HashMap<B256, Bytecode, SimpleBuildHasher>,
    pub logs: Vec<Log>,
    pub block_hashes: HashMap<BlockNumber, B256>,
    pub db: ExtDB,
}

A [Database] implementation that stores all state changes in memory.

This implementation wraps a [DatabaseRef] that is used to load data ([AccountInfo]).

Accounts and code are stored in two separate maps, the accounts map maps addresses to FastDbAccount, whereas contracts are identified by their code hash, and are stored in the contracts map. The FastDbAccount holds the code hash of the contract, which is used to look up the contract in the contracts map.

Fields

accounts: HashMap<Address, FastDbAccount>

Account info where None means it is not existing. Not existing state is needed for Pre TANGERINE forks. code is always None, and bytecode can be found in contracts.

contracts: HashMap<B256, Bytecode, SimpleBuildHasher>

Tracks all contracts by their code hash.

logs: Vec<Log>

All logs that were committed via [DatabaseCommit::commit].

block_hashes: HashMap<BlockNumber, B256>

All cached block hashes from the [DatabaseRef].

db: ExtDB

The underlying database ([DatabaseRef]) that is used to load data.

Note: this is read-only, data is never written to this database.

Implementations

impl<ExtDB> FastCacheDB<ExtDB>

pub fn new(db: ExtDB) -> Self

where ExtDB: DatabaseRef,

pub fn insert_contract(&mut self, account: &mut AccountInfo)

Inserts the account’s code into the cache.

Accounts objects and code are stored separately in the cache, this will take the code from the account and instead map it to the code hash.

Note: This will not insert into the underlying external database.

pub fn insert_account_info(&mut self, address: Address, info: AccountInfo)

Insert account info but not override storage

impl<ExtDB: DatabaseRef> FastCacheDB<ExtDB>

pub fn load_account( &mut self, address: Address, ) -> Result<&mut FastDbAccount, ExtDB::Error>

Returns the account for the given address.

If the account was not found in the cache, it will be loaded from the underlying database.

pub fn insert_account_storage( &mut self, address: Address, slot: U256, value: U256, ) -> Result<(), ExtDB::Error>

insert account storage without overriding account info

pub fn replace_account_storage( &mut self, address: Address, storage: HashMap<U256, U256>, ) -> Result<(), ExtDB::Error>

replace account storage without overriding account info

impl FastCacheDB<Arc<FastCacheDB<EmptyDB>>>

pub fn with_db(self, db: Arc<FastCacheDB<EmptyDB>>) -> Self

pub fn merge(&self) -> FastCacheDB<EmptyDB>

pub fn update_accounts(&self) -> FastCacheDB<EmptyDB>

pub fn update_cells(&self) -> FastCacheDB<EmptyDB>

pub fn apply_geth_update(&mut self, update: BTreeMap<Address, GethAccountState>)

pub fn apply_geth_update_vec( &mut self, update: Vec<BTreeMap<Address, GethAccountState>>, )

Trait Implementations

impl<ExtDB: Clone> Clone for FastCacheDB<ExtDB>

fn clone(&self) -> FastCacheDB<ExtDB>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl<ExtDB: DatabaseRef> Database for FastCacheDB<ExtDB>

fn storage( &mut self, address: Address, index: U256, ) -> Result<U256, Self::Error>

Get the value in an account’s storage slot.

It is assumed that account is already loaded.

type Error = <ExtDB as DatabaseRef>::Error

The database error type.

fn basic( &mut self, address: Address, ) -> Result<Option<AccountInfo>, Self::Error>

Gets basic account information.

fn code_by_hash(&mut self, code_hash: B256) -> Result<Bytecode, Self::Error>

Gets account code by its hash.

fn block_hash(&mut self, number: BlockNumber) -> Result<B256, Self::Error>

Gets block hash by block number.

impl<ExtDB> DatabaseCommit for FastCacheDB<ExtDB>

fn commit(&mut self, changes: HashMap<Address, Account>)

Commit changes to the database.

impl<ExtDB: DatabaseRef> DatabaseRef for FastCacheDB<ExtDB>

type Error = <ExtDB as DatabaseRef>::Error

The database error type.

fn basic_ref( &self, address: Address, ) -> Result<Option<AccountInfo>, Self::Error>

Gets basic account information.

fn code_by_hash_ref(&self, code_hash: B256) -> Result<Bytecode, Self::Error>

Gets account code by its hash.

fn storage_ref( &self, address: Address, index: U256, ) -> Result<U256, Self::Error>

Gets storage value of address at index.

fn block_hash_ref(&self, number: BlockNumber) -> Result<B256, Self::Error>

Gets block hash by block number.

impl<ExtDB: Debug> Debug for FastCacheDB<ExtDB>

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

Formats the value using the given formatter.

impl<ExtDB: Default + DatabaseRef> Default for FastCacheDB<ExtDB>

fn default() -> Self

Returns the “default value” for a type.

Layout

Note: Unable to compute type layout, possibly due to this type having generic parameters. Layout can only be computed for concrete, fully-instantiated types.