1package main
 2
 3import (
 4	"encoding/json"
 5	"io/ioutil"
 6	"math/big"
 7	"testing"
 8
 9	qt "github.com/frankban/quicktest"
10	"github.com/vocdoni/arbo"
11	"go.vocdoni.io/dvote/db"
12	"go.vocdoni.io/dvote/db/badgerdb"
13)
14
15func TestGenerator(t *testing.T) {
16	c := qt.New(t)
17	database, err := badgerdb.New(db.Options{Path: c.TempDir()})
18	c.Assert(err, qt.IsNil)
19	tree, err := arbo.NewTree(arbo.Config{Database: database, MaxLevels: 4,
20		HashFunction: arbo.HashFunctionPoseidon})
21	c.Assert(err, qt.IsNil)
22
23	testVector := [][]int64{
24		{1, 11},
25		{2, 22},
26		{3, 33},
27		{4, 44},
28	}
29	bLen := 1
30	for i := 0; i < len(testVector); i++ {
31		k := arbo.BigIntToBytes(bLen, big.NewInt(testVector[i][0]))
32		v := arbo.BigIntToBytes(bLen, big.NewInt(testVector[i][1]))
33		if err := tree.Add(k, v); err != nil {
34			t.Fatal(err)
35		}
36	}
37
38	// proof of existence
39	k := arbo.BigIntToBytes(bLen, big.NewInt(int64(2)))
40	cvp, err := tree.GenerateCircomVerifierProof(k)
41	c.Assert(err, qt.IsNil)
42	jCvp, err := json.Marshal(cvp)
43	c.Assert(err, qt.IsNil)
44	// store the data into a file that will be used at the circom test
45	err = ioutil.WriteFile("go-smt-verifier-inputs.json", jCvp, 0600)
46	c.Assert(err, qt.IsNil)
47
48	// proof of non-existence
49	k = arbo.BigIntToBytes(bLen, big.NewInt(int64(5)))
50	cvp, err = tree.GenerateCircomVerifierProof(k)
51	c.Assert(err, qt.IsNil)
52	jCvp, err = json.Marshal(cvp)
53	c.Assert(err, qt.IsNil)
54	// store the data into a file that will be used at the circom test
55	err = ioutil.WriteFile("go-smt-verifier-non-existence-inputs.json", jCvp, 0600)
56	c.Assert(err, qt.IsNil)
57}