Function verify_dependencies

atomic-core/src/apply/change.rs:62–75

Verify that all dependencies of a change are present in the repository. Before a change can be applied, all changes it depends on must already be registered in the repository. This function checks for any missing dependencies. # Arguments `txn` - The transaction to check against `change` - The change whose dependencies to verify # Returns A vector of missing dependency hashes. Empty if all de

(
    txn: &T,
    change: &Change,
)

/// }
/// ```
pub fn verify_dependencies<T: GraphTxnT>(
    txn: &T,
    change: &Change,
) -> Result<Vec<Hash>, PristineError> {
    let mut missing = Vec::new();

    for dep_hash in change.dependencies() {
        if txn.get_internal(dep_hash)?.is_none() {
            missing.push(*dep_hash);
        }
    }

    Ok(missing)
}

/// Check if a change has already been applied to a view.
///