1package statedb
  2
  3import (
  4	"io/ioutil"
  5	"math/big"
  6	"os"
  7	"testing"
  8
  9	ethCommon "github.com/ethereum/go-ethereum/common"
 10	"github.com/hermeznetwork/hermez-node/common"
 11	"github.com/iden3/go-iden3-crypto/babyjub"
 12	"github.com/stretchr/testify/assert"
 13	"github.com/stretchr/testify/require"
 14)
 15
 16func TestGetIdx(t *testing.T) {
 17	dir, err := ioutil.TempDir("", "tmpdb")
 18	require.Nil(t, err)
 19	defer assert.Nil(t, os.RemoveAll(dir))
 20
 21	sdb, err := NewStateDB(dir, TypeTxSelector, 0)
 22	assert.Nil(t, err)
 23
 24	var sk babyjub.PrivateKey
 25	copy(sk[:], []byte("1234")) // only for testing
 26	pk := sk.Public()
 27	var sk2 babyjub.PrivateKey
 28	copy(sk2[:], []byte("12345")) // only for testing
 29	pk2 := sk2.Public()
 30	addr := ethCommon.HexToAddress("0x74E803744B7EEFc272E852f89a05D41515d431f2")
 31	addr2 := ethCommon.HexToAddress("0x54A0706531cEa2ee8F09bAd22f604e377bb56948")
 32	idx := common.Idx(1234)
 33	idx2 := common.Idx(12345)
 34	idx3 := common.Idx(1233)
 35
 36	// store the keys for idx by Addr & BJJ
 37	err = sdb.setIdxByEthAddrBJJ(idx, addr, pk)
 38	require.Nil(t, err)
 39
 40	idxR, err := sdb.GetIdxByEthAddrBJJ(addr, pk)
 41	assert.Nil(t, err)
 42	assert.Equal(t, idx, idxR)
 43
 44	// expect error when getting only by EthAddr, as value does not exist
 45	// in the db for only EthAddr
 46	_, err = sdb.GetIdxByEthAddr(addr)
 47	assert.Nil(t, err)
 48	_, err = sdb.GetIdxByEthAddr(addr2)
 49	assert.NotNil(t, err)
 50
 51	// expect to fail
 52	idxR, err = sdb.GetIdxByEthAddrBJJ(addr2, pk)
 53	assert.NotNil(t, err)
 54	assert.Equal(t, common.Idx(0), idxR)
 55	idxR, err = sdb.GetIdxByEthAddrBJJ(addr, pk2)
 56	assert.NotNil(t, err)
 57	assert.Equal(t, common.Idx(0), idxR)
 58
 59	// try to store bigger idx, will not affect as already exist a smaller
 60	// Idx for that Addr & BJJ
 61	err = sdb.setIdxByEthAddrBJJ(idx2, addr, pk)
 62	assert.Nil(t, err)
 63
 64	// store smaller idx
 65	err = sdb.setIdxByEthAddrBJJ(idx3, addr, pk)
 66	assert.Nil(t, err)
 67
 68	idxR, err = sdb.GetIdxByEthAddrBJJ(addr, pk)
 69	assert.Nil(t, err)
 70	assert.Equal(t, idx3, idxR)
 71
 72	// by EthAddr should work
 73	idxR, err = sdb.GetIdxByEthAddr(addr)
 74	assert.Nil(t, err)
 75	assert.Equal(t, idx3, idxR)
 76	// expect error when trying to get Idx by addr2 & pk2
 77	idxR, err = sdb.GetIdxByEthAddrBJJ(addr2, pk2)
 78	assert.NotNil(t, err)
 79	assert.Equal(t, ErrToIdxNotFound, err)
 80	assert.Equal(t, common.Idx(0), idxR)
 81}
 82
 83func TestBJJCompressedTo256BigInt(t *testing.T) {
 84	var pkComp babyjub.PublicKeyComp
 85	r := BJJCompressedTo256BigInts(pkComp)
 86	zero := big.NewInt(0)
 87	for i := 0; i < 256; i++ {
 88		assert.Equal(t, zero, r[i])
 89	}
 90
 91	pkComp[0] = 3
 92	r = BJJCompressedTo256BigInts(pkComp)
 93	one := big.NewInt(1)
 94	for i := 0; i < 256; i++ {
 95		if i != 0 && i != 1 {
 96			assert.Equal(t, zero, r[i])
 97		} else {
 98			assert.Equal(t, one, r[i])
 99		}
100	}
101
102	pkComp[31] = 4
103	r = BJJCompressedTo256BigInts(pkComp)
104	for i := 0; i < 256; i++ {
105		if i != 0 && i != 1 && i != 250 {
106			assert.Equal(t, zero, r[i])
107		} else {
108			assert.Equal(t, one, r[i])
109		}
110	}
111}