Struct CompressedForm 

pub struct CompressedForm {
    pub a: BigInt,
    pub t: BigInt,
    pub g: BigInt,
    pub b0: BigInt,
    pub b_sign: bool,
}

Compressed representation of a binary quadratic form $(a, b)$ in Chia’s BQFC format.

BQFC (Binary Quadratic Form Compression) reduces the storage of a 1024-bit form from 128+ bytes to exactly 100 bytes by encoding the partial XGCD decomposition of $(a, b)$ rather than storing the coefficients directly.

Fields

a: BigInt

Compressed form of the a coefficient (divided by g if g > 1).

t: BigInt

Partial XGCD quotient $t$ such that $t \cdot b \equiv \pm\sqrt{D} \pmod{a}$.

g: BigInt

Common divisor $g = \gcd(a, t)$; equal to 1 when no further factoring is needed.

b0: BigInt

High-order correction term $b_0 = b / a’$ (non-zero only when g > 1).

b_sign: bool

Sign of the original b coefficient (true = negative).

Trait Implementations

impl Clone for CompressedForm

fn clone(&self) -> CompressedForm

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CompressedForm

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

Formats the value using the given formatter.