Enum PropagationDirection 

pub enum PropagationDirection {
    Bidirectional,
    UpOnly,
    DownOnly,
    SystemWide,
}

Propagation direction for tombstones (ADR-034)

Controls which direction tombstones flow in the hierarchy:

• Bidirectional: Both up to parents and down to children
• UpOnly: Only to parent cells (e.g., contact_reports)
• DownOnly: Only to child cells (e.g., commands)
• SystemWide: Propagate to ALL peers (eventually consistent)

Variants

Bidirectional

Sync bidirectionally (both up and down hierarchy)

UpOnly

Sync only upward to parent cells

DownOnly

Sync only downward to child cells

SystemWide

Sync to all peers regardless of hierarchy (eventually consistent)

Use for security-critical deletions that must reach all nodes:

• PII removal (GDPR/privacy compliance)
• Malicious content removal
• Security-revoked credentials

Implementations

impl PropagationDirection

pub fn default_for_collection(collection: &str) -> PropagationDirection

Default propagation direction for a collection

Per ADR-034 strategy matrix:

• nodes/tracks/alerts: Bidirectional
• cells/contact_reports: Up only
• commands: Down only

pub fn allows_up(&self) -> bool

Check if this direction allows syncing to parent

pub fn allows_down(&self) -> bool

Check if this direction allows syncing to children

pub fn is_system_wide(&self) -> bool

Check if this is a system-wide propagation

Trait Implementations

impl Clone for PropagationDirection

fn clone(&self) -> PropagationDirection

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PropagationDirection

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for PropagationDirection

fn default() -> PropagationDirection

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for PropagationDirection

fn deserialize<__D>( __deserializer: __D, ) -> Result<PropagationDirection, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for PropagationDirection

fn hash<__H>(&self, state: &mut __H)

where __H: Hasher,

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for PropagationDirection

fn eq(&self, other: &PropagationDirection) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for PropagationDirection

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for PropagationDirection

impl Eq for PropagationDirection

impl StructuralPartialEq for PropagationDirection