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package bn128
import (
"bytes"
"math/big"
"testing"
"github.com/stretchr/testify/assert"
)
func TestBN128(t *testing.T) {
bn128, err := NewBn128()
assert.Nil(t, err)
big40 := big.NewInt(int64(40))
big75 := big.NewInt(int64(75))
g1a := bn128.G1.MulScalar(bn128.G1.G, bn128.Fq1.Copy(big40))
g2a := bn128.G2.MulScalar(bn128.G2.G, bn128.Fq1.Copy(big75))
g1b := bn128.G1.MulScalar(bn128.G1.G, bn128.Fq1.Copy(big75))
g2b := bn128.G2.MulScalar(bn128.G2.G, bn128.Fq1.Copy(big40))
pre1a := bn128.PreComputeG1(g1a)
pre2a, err := bn128.PreComputeG2(g2a)
assert.Nil(t, err)
pre1b := bn128.PreComputeG1(g1b)
pre2b, err := bn128.PreComputeG2(g2b)
assert.Nil(t, err)
r1 := bn128.MillerLoop(pre1a, pre2a)
r2 := bn128.MillerLoop(pre1b, pre2b)
rbe := bn128.Fq12.Mul(r1, bn128.Fq12.Inverse(r2))
res := bn128.FinalExponentiation(rbe)
a := bn128.Fq12.Affine(res)
b := bn128.Fq12.Affine(bn128.Fq12.One())
assert.True(t, bn128.Fq12.Equal(a, b))
assert.True(t, bn128.Fq12.Equal(res, bn128.Fq12.One()))
}
func TestBN128Pairing(t *testing.T) {
bn128, err := NewBn128()
assert.Nil(t, err)
big25 := big.NewInt(int64(25))
big30 := big.NewInt(int64(30))
g1a := bn128.G1.MulScalar(bn128.G1.G, big25)
g2a := bn128.G2.MulScalar(bn128.G2.G, big30)
g1b := bn128.G1.MulScalar(bn128.G1.G, big30)
g2b := bn128.G2.MulScalar(bn128.G2.G, big25)
pA, err := bn128.Pairing(g1a, g2a)
assert.Nil(t, err)
pB, err := bn128.Pairing(g1b, g2b)
assert.Nil(t, err)
assert.True(t, bn128.Fq12.Equal(pA, pB))
assert.True(t, !bytes.Equal(pA[0][0][0].Bytes(), big.NewInt(int64(0)).Bytes()))
assert.True(t, !bytes.Equal(bn128.Fq12.Affine(pA)[0][0][0].Bytes(), big.NewInt(int64(0)).Bytes()))
// assert.Equal(t, pA[0][0][0].String(), "73680848340331011700282047627232219336104151861349893575958589557226556635706")
// assert.Equal(t, bn128.Fq12.Affine(pA)[0][0][0].String(), "8016119724813186033542830391460394070015218389456422587891475873290878009957")
}