Fork

darkfi::validator::consensus

Struct Fork 

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pub struct Fork {
    pub blockchain: Blockchain,
    pub overlay: BlockchainOverlayPtr,
    pub module: PoWModule,
    pub state_monotree: Monotree<MemoryDb>,
    pub proposals: Vec<HeaderHash>,
    pub diffs: Vec<SledDbOverlayStateDiff>,
    pub mempool: Vec<TransactionHash>,
    pub targets_rank: BigUint,
    pub hashes_rank: BigUint,
}
Expand description

Struct representing a forked blockchain state.

An overlay over the original blockchain is used, containing all pending to-write records. Additionally, each fork keeps a vector of valid pending transactions hashes, in order of receival, and the proposals hashes sequence, for validations.

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§blockchain: Blockchain

Canonical (confirmed) blockchain

§overlay: BlockchainOverlayPtr

Overlay cache over canonical Blockchain

§module: PoWModule

Current PoW module state

§state_monotree: Monotree<MemoryDb>

Current contracts states Monotree(SMT)

§proposals: Vec<HeaderHash>

Fork proposal hashes sequence

§diffs: Vec<SledDbOverlayStateDiff>

Fork proposal overlay diffs sequence

§mempool: Vec<TransactionHash>

Valid pending transaction hashes

§targets_rank: BigUint

Current fork mining targets rank, cached for better performance

§hashes_rank: BigUint

Current fork hashes rank, cached for better performance

Implementations§

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impl Fork

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pub async fn new(blockchain: Blockchain, module: PoWModule) -> Result<Self>

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pub async fn append_proposal(&mut self, proposal: &Proposal) -> Result<()>

Auxiliary function to append a proposal and update current fork rank.

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pub fn last_proposal(&self) -> Result<Proposal>

Auxiliary function to retrieve last proposal.

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pub fn get_next_block_height(&self) -> Result<u32>

Auxiliary function to compute forks’ next block height.

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pub async fn unproposed_txs( &self, verifying_block_height: u32, verify_fees: bool, ) -> Result<(Vec<Transaction>, u64, u64)>

Auxiliary function to retrieve unproposed valid transactions, along with their total gas used and total paid fees.

Note: Always remember to purge new trees from the overlay if not needed.

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pub fn full_clone(&self) -> Result<Self>

Auxiliary function to create a full clone using BlockchainOverlay::full_clone. Changes to this copy don’t affect original fork overlay records, since underlying overlay pointer have been updated to the cloned one.

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pub fn compute_monotree(&mut self) -> Result<()>

Build current contract states monotree.

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pub fn healthcheck(&self) -> Result<()>

Auxiliary function to check current contracts states Monotree(SMT) validity.

Note: This should be executed on fresh forks and/or when a fork doesn’t contain changes over the last appended

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pub fn purge_new_trees(&self)

Auxiliary function to purge all new trees from the fork overlay.

Trait Implementations§

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impl Clone for Fork

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fn clone(&self) -> Fork

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more

Auto Trait Implementations§

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impl Freeze for Fork

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impl !RefUnwindSafe for Fork

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impl Send for Fork

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impl Sync for Fork

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impl Unpin for Fork

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impl !UnwindSafe for Fork

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