Struct State

pub struct State {
    pub db: Arc<RwLock<Box<dyn Database + Send + Sync>>>,
    pub verified_blocks: Arc<RwLock<HashMap<Id, Block>>>,
}

Manages block and chain states for this Vm, both in-memory and persistent.

Fields

db: Arc<RwLock<Box<dyn Database + Send + Sync>>>

verified_blocks: Arc<RwLock<HashMap<Id, Block>>>

Maps block Id to Block. Each element is verified but not yet accepted/rejected (e.g., preferred).

Implementations

impl State

pub async fn set_last_accepted_block(&self, blk_id: &Id) -> Result<()>

Persists the last accepted block Id to state.

Errors

Fails if the db can’t be updated

pub async fn has_last_accepted_block(&self) -> Result<bool>

Returns “true” if there’s a last accepted block found.

Errors

Fails if the db can’t be read

pub async fn get_last_accepted_block_id(&self) -> Result<Id>

Returns the last accepted block Id from state.

Errors

Can fail if the db can’t be read

pub async fn add_verified(&mut self, block: &Block)

Adds a block to “verified_blocks”.

pub async fn remove_verified(&mut self, blk_id: &Id)

Removes a block from “verified_blocks”.

pub async fn has_verified(&self, blk_id: &Id) -> bool

Returns “true” if the block Id has been already verified.

pub async fn write_block(&mut self, block: &Block) -> Result<()>

Writes a block to the state storage.

Errors

Can fail if the block fails to serialize or if the db can’t be updated

pub async fn get_block(&self, blk_id: &Id) -> Result<Block>

Reads a block from the state storage using the block_with_status_key.

Errors

Can fail if the block is not found in the state storage, or if the block fails to deserialize

Trait Implementations

impl Clone for State

fn clone(&self) -> State

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Default for State

fn default() -> State

Returns the “default value” for a type.