Function holochain::core::validate_chain

source · 
pub fn validate_chain<'iter, A: 'iter + ChainItem>(
    actions: impl Iterator<Item = &'iter A>,
    persisted_chain_head: &Option<(A::Hash, u32)>
) -> SysValidationResult<()>
Expand description

Validate a chain of actions with an optional starting point.

Examples found in repository?
src/conductor/conductor/graft_records_onto_source_chain.rs (line 148)
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async fn validate_records(
    handle: ConductorHandle,
    cell_id: &CellId,
    chain_top: &Option<(ActionHash, u32)>,
    records: &[Record],
) -> ConductorApiResult<()> {
    let space = handle.get_or_create_space(cell_id.dna_hash())?;
    let ribosome = handle.get_ribosome(cell_id.dna_hash())?;
    let chc = None;
    let network = handle
        .holochain_p2p()
        .to_dna(cell_id.dna_hash().clone(), chc);

    // Create a raw source chain to validate against because
    // genesis may not have been run yet.
    let workspace = SourceChainWorkspace::raw_empty(
        space.authored_db.clone(),
        space.dht_db.clone(),
        space.dht_query_cache.clone(),
        space.cache_db.clone(),
        handle.keystore().clone(),
        cell_id.agent_pubkey().clone(),
        Arc::new(ribosome.dna_def().as_content().clone()),
    )
    .await?;

    let sc = workspace.source_chain();

    // Validate the chain.
    crate::core::validate_chain(records.iter().map(|e| e.signed_action()), chain_top)
        .map_err(|e| SourceChainError::InvalidCommit(e.to_string()))?;

    // Add the records to the source chain so we can validate them.
    sc.scratch()
        .apply(|scratch| {
            for r in records {
                holochain_state::prelude::insert_record_scratch(
                    scratch,
                    r.clone(),
                    Default::default(),
                );
            }
        })
        .map_err(SourceChainError::from)?;

    // Run the individual record validations.
    crate::core::workflow::inline_validation(
        workspace.clone(),
        network.clone(),
        handle.clone(),
        ribosome,
    )
    .await?;

    Ok(())
}