Struct SourcePool 

pub struct SourcePool {
    pub accounts: Vec<String>,
    /* private fields */
}

One source’s account pool with a fitted Dirichlet PMF, ready to sample from.

Fields

accounts: Vec<String>

Accounts in this source’s pool (size = n()).

Implementations

impl SourcePool

pub fn new( pool_size: usize, all_accounts: &[String], account_weights: &[f64], alpha: f64, rng: &mut ChaCha8Rng, ) -> Self

Build a pool of pool_size accounts drawn from all_accounts weighted by account_weights (deduplicated), with a symmetric Dirichlet(α) PMF over them.

pub fn n(&self) -> usize

Number of accounts in the pool.

pub fn sample_one(&self, rng: &mut ChaCha8Rng) -> &str

Draw a single account from the PMF.

pub fn sample_pair(&self, rng: &mut ChaCha8Rng) -> Option<(String, String)>

Draw a (debit_account, credit_account) pair from the per-source PMF, with the distinct-accounts constraint. Returns None if the pool has fewer than 2 accounts (the caller should fall back to the global picker).

pub fn normalised_entropy(&self) -> f64

Normalised Shannon entropy of the PMF in [0, 1]. Useful for tests + observability (e.g. comparing to the corpus’s source-conditional entropy band).

Trait Implementations

impl Clone for SourcePool

fn clone(&self) -> SourcePool

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SourcePool

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

Formats the value using the given formatter.