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package verifier
import (
"fmt"
"math/big"
bn256 "github.com/ethereum/go-ethereum/crypto/bn256/cloudflare"
"github.com/iden3/go-circom-prover-verifier/types"
)
// Vk is the Verification Key data structure
type Vk struct {
Alpha *bn256.G1
Beta *bn256.G2
Gamma *bn256.G2
Delta *bn256.G2
IC []*bn256.G1
}
func Verify(vk *types.Vk, proof *types.Proof, inputs []*big.Int) bool {
if len(inputs)+1 != len(vk.IC) {
fmt.Println("len(inputs)+1 != len(vk.IC)")
return false
}
vkX := new(bn256.G1).ScalarBaseMult(big.NewInt(0))
for i := 0; i < len(inputs); i++ {
// check input inside field
if inputs[i].Cmp(types.R) != -1 {
return false
}
vkX = new(bn256.G1).Add(vkX, new(bn256.G1).ScalarMult(vk.IC[i+1], inputs[i]))
}
vkX = new(bn256.G1).Add(vkX, vk.IC[0])
g1 := []*bn256.G1{proof.A, new(bn256.G1).Neg(vk.Alpha), vkX.Neg(vkX), new(bn256.G1).Neg(proof.C)}
g2 := []*bn256.G2{proof.B, vk.Beta, vk.Gamma, vk.Delta}
return bn256.PairingCheck(g1, g2)
}