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optimized goldilocks (#22)

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* cleaned up qe api

* modified goldilocks poseidon to use optimized goldilocks operations

* better comment

* added goldilocks test cases

* some cleanup and comments

* changed poseidon constaints to frontend.Variable

* fixed double cast

* fixed bug in challenger
This commit is contained in:
Kevin Jue
2023-06-08 14:22:42 -07:00
committed by GitHub
parent ecfc4a7b2b
commit 15b7dcbcdb
11 changed files with 1462 additions and 1228 deletions
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2
verifier/internal/gates/poseidon_gate.go
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@@ -147,7 +147,7 @@ func (g *PoseidonGate) EvalUnfiltered(api frontend.API, qeAPI *field.QuadraticEx
sBoxIn := vars.localWires[g.WirePartialSBox(r)]
constraints = append(constraints, qeAPI.SubExtension(state[0], sBoxIn))
state[0] = poseidonChip.SBoxMonomialExtension(sBoxIn)
state[0] = qeAPI.AddExtension(state[0], qeAPI.FieldToQE(poseidon.FAST_PARTIAL_ROUND_CONSTANTS[r]))
state[0] = qeAPI.AddExtension(state[0], qeAPI.VarToQE(poseidon.FAST_PARTIAL_ROUND_CONSTANTS[r]))
state = poseidonChip.MdsPartialLayerFastExtension(state, int(r))
}
sBoxIn := vars.localWires[g.WirePartialSBox(poseidon.N_PARTIAL_ROUNDS-1)]

4
verifier/internal/gates/poseidon_mds_gate.go
View File

@@ -47,11 +47,11 @@ func (g *PoseidonMdsGate) mdsRowShfAlgebra(r uint64, v [poseidon.SPONGE_WIDTH]fi
res := qeAPI.ZERO_QE_ALGEBRA
for i := uint64(0); i < poseidon.SPONGE_WIDTH; i++ {
coeff := qeAPI.FieldToQE(poseidon.MDS_MATRIX_CIRC[i])
coeff := qeAPI.VarToQE(poseidon.MDS_MATRIX_CIRC[i])
res = qeAPI.AddExtensionAlgebra(res, qeAPI.ScalarMulExtensionAlgebra(coeff, v[(i+r)%poseidon.SPONGE_WIDTH]))
}
coeff := qeAPI.FieldToQE(poseidon.MDS_MATRIX_DIAG[r])
coeff := qeAPI.VarToQE(poseidon.MDS_MATRIX_DIAG[r])
res = qeAPI.AddExtensionAlgebra(res, qeAPI.ScalarMulExtensionAlgebra(coeff, v[r]))
return res