1package arbo
 2
 3import (
 4	"encoding/json"
 5	"math/big"
 6	"testing"
 7
 8	qt "github.com/frankban/quicktest"
 9	"go.vocdoni.io/dvote/db"
10)
11
12func TestCircomVerifierProof(t *testing.T) {
13	c := qt.New(t)
14	database, err := db.NewBadgerDB(c.TempDir())
15	c.Assert(err, qt.IsNil)
16	tree, err := NewTree(database, 4, HashFunctionPoseidon)
17	c.Assert(err, qt.IsNil)
18	defer tree.db.Close() //nolint:errcheck
19
20	bLen := tree.HashFunction().Len()
21
22	testVector := [][]int64{
23		{1, 11},
24		{2, 22},
25		{3, 33},
26		{4, 44},
27	}
28	for i := 0; i < len(testVector); i++ {
29		k := BigIntToBytes(bLen, big.NewInt(testVector[i][0]))
30		v := BigIntToBytes(bLen, big.NewInt(testVector[i][1]))
31		if err := tree.Add(k, v); err != nil {
32			t.Fatal(err)
33		}
34	}
35
36	// proof of existence
37	k := BigIntToBytes(bLen, big.NewInt(int64(2)))
38	cvp, err := tree.GenerateCircomVerifierProof(k)
39	c.Assert(err, qt.IsNil)
40	jCvp, err := json.Marshal(cvp)
41	c.Assert(err, qt.IsNil)
42	// test vector checked with a circom circuit (arbo/testvectors/circom)
43	c.Assert(string(jCvp), qt.Equals, `{"fnc":0,"isOld0":"0","key":"2","oldK`+
44		`ey":"0","oldValue":"0","root":"1355816845522055904274785395894906304622`+
45		`6645447188878859760119761585093422436","siblings":["1162013050763544193`+
46		`2056895853942898236773847390796721536119314875877874016518","5158240518`+
47		`874928563648144881543092238925265313977134167935552944620041388700","0"`+
48		`,"0"],"value":"22"}`)
49
50	// proof of non-existence
51	k = BigIntToBytes(bLen, big.NewInt(int64(5)))
52	cvp, err = tree.GenerateCircomVerifierProof(k)
53	c.Assert(err, qt.IsNil)
54	jCvp, err = json.Marshal(cvp)
55	c.Assert(err, qt.IsNil)
56	// test vector checked with a circom circuit (arbo/testvectors/circom)
57	c.Assert(string(jCvp), qt.Equals, `{"fnc":1,"isOld0":"0","key":"5","oldK`+
58		`ey":"1","oldValue":"11","root":"135581684552205590427478539589490630462`+
59		`26645447188878859760119761585093422436","siblings":["756056982086999933`+
60		`1905412009838015295115276841209205575174464206730109811365","1276103081`+
61		`3800436751877086580591648324911598798716611088294049841213649313596","0`+
62		`","0"],"value":"11"}`)
63}