Struct UID 

pub struct UID {
    pub first: u64,
    pub second: u64,
}

128-bit unique identifier (FDB-compatible).

FDB pattern: well-known UIDs use first = u64::MAX (equivalent to -1 in C++). Random UIDs have both parts randomly generated.

Examples

use moonpool_core::UID;

// Create a well-known UID for system services
let ping_token = UID::well_known(1);
assert!(ping_token.is_well_known());

// Create a regular UID
let uid = UID::new(0x123, 0x456);
assert!(!uid.is_well_known());

Fields

first: u64

First 64 bits. For well-known UIDs, this is u64::MAX.

second: u64

Second 64 bits. For well-known UIDs, this is the token ID.

Implementations

impl UID

pub const fn new(first: u64, second: u64) -> Self

Create a new UID with explicit values.

pub const fn well_known(token_id: u32) -> Self

Create a well-known UID (FDB pattern: first = -1).

Well-known UIDs are used for system services that need deterministic addressing without discovery (e.g., Ping, EndpointNotFound).

pub const fn is_well_known(&self) -> bool

Check if this is a well-known UID.

Well-known UIDs have first == u64::MAX, allowing O(1) lookup in the endpoint map via array indexing.

pub const fn adjusted(&self, index: u32) -> Self

Create adjusted UID for interface serialization (FDB pattern).

Used to derive multiple endpoints from a single base token. This allows serializing only one endpoint for an interface, with others derived using this method.

FDB Implementation

From FlowTransport.h:

UID(token.first() + (uint64_t(index) << 32),
    (token.second() & 0xffffffff00000000LL) | newIndex)

pub const fn is_valid(&self) -> bool

Check if UID is valid (non-zero).

Trait Implementations

impl Clone for UID

fn clone(&self) -> UID

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for UID

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

Formats the value using the given formatter.

impl Default for UID

fn default() -> UID

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for UID

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Display for UID

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

Formats the value using the given formatter.

impl Hash for UID

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

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 UID

fn eq(&self, other: &UID) -> 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 UID

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for UID

impl Eq for UID

impl StructuralPartialEq for UID