Enum Rng 

pub enum Rng {
    Os,
    Seeded(SeededRng),
}

A random number generator that can be either OS-backed or seeded/deterministic.

Variants

Os

Uses OS entropy via getrandom (non-deterministic).

Seeded(SeededRng)

Uses a seeded PRNG for deterministic output (e.g. testing).

Implementations

impl Rng

pub fn seeded(seed: u64) -> Self

Create a deterministic RNG from the given seed.

pub fn bytes_16(&self) -> [u8; 16]

Generate 16 random bytes (suitable for UUID v4).

pub fn bytes_32(&self) -> [u8; 32]

Generate 32 random bytes (suitable for token generation).

pub fn bytes_10(&self) -> [u8; 10]

Generate 10 random bytes (suitable for UUID v7 random portion).

pub fn infra_bytes_10(&self) -> [u8; 10]

Generate 10 random bytes from the infrastructure RNG stream.

Uses a separate RNG stream so that infrastructure operations (like transaction ID generation) do not perturb the primary RNG state. This ensures deterministic test output regardless of how many internal transactions each test runner creates.

pub fn infra_bytes_32(&self) -> [u8; 32]

Generate 32 random bytes from the infrastructure RNG stream.

Uses a separate RNG stream for infrastructure operations (like session token generation) that should not affect deterministic test output.

Trait Implementations

impl Clone for Rng

fn clone(&self) -> Rng

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Default for Rng

fn default() -> Rng

Returns the “default value” for a type.