arnaucube/go-circom-prover-verifier
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Add polynomials arithmetic in goff

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Polynomials and ifft moved to goff (iden3/go-iden3-crypto/ff) instead of *big.Int.

Benchmarks:

- Before:
BenchmarkArithmetic/polynomialSub-4         	    2774	    441063 ns/op
BenchmarkArithmetic/polynomialMul-4         	       1	1135732757 ns/op
BenchmarkArithmetic/polynomialDiv-4         	     768	   1425192 ns/op
BenchmarkGenerateProof-4                    	       1	2844488975 ns/op

- With this commit:
BenchmarkArithmetic/polynomialSubE-4        	   23097	     54152 ns/op
BenchmarkArithmetic/polynomialMulE-4        	      25	  44914327 ns/op
BenchmarkArithmetic/polynomialDivE-4        	    8703	    132573 ns/op
BenchmarkGenerateProof-4                    	       1	1530398526 ns/op
This commit is contained in:
arnaucube
2020-04-20 12:37:49 +02:00
parent 3f5f8e2318
commit 324c817d42
7 changed files with 178 additions and 33 deletions
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20
prover/prover.go
View File

@@ -6,6 +6,7 @@ import (
bn256 "github.com/ethereum/go-ethereum/crypto/bn256/cloudflare"
"github.com/iden3/go-circom-prover-verifier/types"
"github.com/iden3/go-iden3-crypto/utils"
)
// Proof is the data structure of the Groth16 zkSNARK proof
@@ -123,13 +124,18 @@ func calculateH(pk *types.Pk, w types.Witness) []*big.Int {
polCT[j] = fAdd(polCT[j], fMul(w[i], pk.PolsC[i][j]))
}
}
polAS := ifft(polAT)
polBS := ifft(polBT)
polATe := utils.BigIntArrayToElementArray(polAT)
polBTe := utils.BigIntArrayToElementArray(polBT)
polCTe := utils.BigIntArrayToElementArray(polCT)
polABS := polynomialMul(polAS, polBS)
polCS := ifft(polCT)
polABCS := polynomialSub(polABS, polCS)
polASe := ifft(polATe)
polBSe := ifft(polBTe)
polABSe := polynomialMulE(polASe, polBSe)
hS := polABCS[m:]
return hS
polCSe := ifft(polCTe)
polABCSe := polynomialSubE(polABSe, polCSe)
hSe := polABCSe[m:]
return ElementArrayToBigIntArray(hSe)
}