Struct clarity_repl::clarity::database::marf::NullBackingStore

pub struct NullBackingStore {}

Implementations

impl NullBackingStore

pub fn new() -> Self

pub fn as_clarity_db<'a>(&'a mut self) -> ClarityDatabase<'a>

pub fn as_analysis_db<'a>(&'a mut self) -> AnalysisDatabase<'a>

Trait Implementations

impl ClarityBackingStore for NullBackingStore

fn set_block_hash(&mut self, _bhh: StacksBlockId) -> Result<StacksBlockId>

change the current MARF context to service reads from a different chain_tip used to implement time-shifted evaluation. returns the previous block header hash on success

fn get(&mut self, _key: &str) -> Option<String>

fetch K-V out of the committed datastore

fn get_block_at_height(&mut self, _height: u32) -> Option<StacksBlockId>

fn get_open_chain_tip(&mut self) -> StacksBlockId

fn get_open_chain_tip_height(&mut self) -> u32

fn get_current_block_height(&mut self) -> u32

this function returns the current block height, as viewed by this marfed-kv structure, i.e., it changes on time-shifted evaluation. the open_chain_tip functions always return data about the chain tip that is currently open for writing.

fn put_all(&mut self, _items: Vec<(String, String)>)

put K-V data into the committed datastore

fn insert_metadata(
    &mut self,
    contract: &QualifiedContractIdentifier,
    key: &str,
    value: &str
)

This function is used to obtain a committed contract hash, and the block header hash of the block in which the contract was initialized. This data is used to store contract metadata in the side store.

fn get_metadata(
    &mut self,
    contract: &QualifiedContractIdentifier,
    key: &str
) -> Result<Option<String>>

fn has_entry(&mut self, key: &str) -> bool

fn make_contract_commitment(
    &mut self,
    contract_hash: Sha512Trunc256Sum
) -> String

The contract commitment is the hash of the contract, plus the block height in which the contract was initialized.