bb::Poseidon2InternalRelationImpl< FF_ > Class Template Reference

#include <poseidon2_internal_relation.hpp>

Public Types
using	FF = FF_

Static Public Member Functions
template<typename AllEntities >
static bool	skip (const AllEntities &in)
	Returns true if the contribution from all subrelations for the provided inputs is identically zero.
template<typename ContainerOverSubrelations , typename AllEntities , typename Parameters >
static void	accumulate (ContainerOverSubrelations &evals, const AllEntities &in, const Parameters &, const FF &scaling_factor)
	Expression for the poseidon2 internal round relation, based on I_i in Section 6 of https://eprint.iacr.org/2023/323.pdf.

Static Public Attributes
static constexpr std::array< size_t, 4 >	SUBRELATION_PARTIAL_LENGTHS

Detailed Description

template<typename FF_>
class bb::Poseidon2InternalRelationImpl< FF_ >

Definition at line 13 of file poseidon2_internal_relation.hpp.

Member Typedef Documentation

FF

template<typename FF_ >

using bb::Poseidon2InternalRelationImpl< FF_ >::FF = FF_

Definition at line 15 of file poseidon2_internal_relation.hpp.

Member Function Documentation

accumulate()

template<typename FF_ >

template<typename ContainerOverSubrelations , typename AllEntities , typename Parameters >

static void bb::Poseidon2InternalRelationImpl< FF_ >::accumulate ( ContainerOverSubrelations &  evals, const AllEntities &  in, const Parameters &  , const FF &  scaling_factor  )

inlinestatic

Expression for the poseidon2 internal round relation, based on I_i in Section 6 of https://eprint.iacr.org/2023/323.pdf.

This relation is defined as C(in(X)...) := q_poseidon2_internal * ( (v1 - w_1_shift) + \alpha * (v2 - w_2_shift) + \alpha^2 * (v3 - w_3_shift) + \alpha^3 * (v4 - w_4_shift) ) = 0 where: u1 := (w_1 + q_1)^5 sum := u1 + w_2 + w_3 + w_4 v1 := u1 * D1 + sum v2 := w_2 * D2 + sum v3 := w_3 * D3 + sum v4 := w_4 * D4 + sum Di is the ith internal diagonal value - 1 of the internal matrix M_I

Parameters

evals	transformed to evals + C(in(X)...)*scaling_factor
in	an std::array containing the fully extended Univariate edges.
parameters	contains beta, gamma, and public_input_delta, ....
scaling_factor	optional term to scale the evaluation before adding to evals.

Definition at line 53 of file poseidon2_internal_relation.hpp.

skip()

template<typename FF_ >

template<typename AllEntities >

static bool bb::Poseidon2InternalRelationImpl< FF_ >::skip ( const AllEntities &  in )

inlinestatic

Returns true if the contribution from all subrelations for the provided inputs is identically zero.

Definition at line 28 of file poseidon2_internal_relation.hpp.

Member Data Documentation

SUBRELATION_PARTIAL_LENGTHS

template<typename FF_ >

constexpr std::array<size_t, 4> bb::Poseidon2InternalRelationImpl< FF_ >::SUBRELATION_PARTIAL_LENGTHS

staticconstexpr

Initial value:

{
        7, 
        7, 
        7, 
        7, 
    }

Definition at line 17 of file poseidon2_internal_relation.hpp.

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The documentation for this class was generated from the following file:

• src/barretenberg/relations/poseidon2_internal_relation.hpp