1package statedb
  2
  3import (
  4	"fmt"
  5	"io/ioutil"
  6	"math/big"
  7	"os"
  8	"testing"
  9
 10	ethCommon "github.com/ethereum/go-ethereum/common"
 11	"github.com/hermeznetwork/hermez-node/common"
 12	"github.com/hermeznetwork/tracerr"
 13	"github.com/iden3/go-iden3-crypto/babyjub"
 14	"github.com/stretchr/testify/assert"
 15	"github.com/stretchr/testify/require"
 16)
 17
 18func TestGetIdx(t *testing.T) {
 19	dir, err := ioutil.TempDir("", "tmpdb")
 20	require.Nil(t, err)
 21	defer assert.Nil(t, os.RemoveAll(dir))
 22
 23	sdb, err := NewStateDB(dir, TypeTxSelector, 0)
 24	assert.Nil(t, err)
 25
 26	var sk babyjub.PrivateKey
 27	copy(sk[:], []byte("1234")) // only for testing
 28	pk := sk.Public()
 29	var sk2 babyjub.PrivateKey
 30	copy(sk2[:], []byte("12345")) // only for testing
 31	pk2 := sk2.Public()
 32	addr := ethCommon.HexToAddress("0x74E803744B7EEFc272E852f89a05D41515d431f2")
 33	addr2 := ethCommon.HexToAddress("0x54A0706531cEa2ee8F09bAd22f604e377bb56948")
 34	idx := common.Idx(1234)
 35	idx2 := common.Idx(12345)
 36	idx3 := common.Idx(1233)
 37
 38	tokenID0 := common.TokenID(0)
 39	tokenID1 := common.TokenID(1)
 40
 41	// store the keys for idx by Addr & BJJ
 42	err = sdb.setIdxByEthAddrBJJ(idx, addr, pk, tokenID0)
 43	require.Nil(t, err)
 44
 45	idxR, err := sdb.GetIdxByEthAddrBJJ(addr, pk, tokenID0)
 46	assert.Nil(t, err)
 47	assert.Equal(t, idx, idxR)
 48
 49	// expect error when getting only by EthAddr, as value does not exist
 50	// in the db for only EthAddr
 51	_, err = sdb.GetIdxByEthAddr(addr, tokenID0)
 52	assert.Nil(t, err)
 53	_, err = sdb.GetIdxByEthAddr(addr2, tokenID0)
 54	assert.NotNil(t, err)
 55	// expect error when getting by EthAddr and BJJ, but for another TokenID
 56	_, err = sdb.GetIdxByEthAddrBJJ(addr, pk, tokenID1)
 57	assert.NotNil(t, err)
 58
 59	// expect to fail
 60	idxR, err = sdb.GetIdxByEthAddrBJJ(addr2, pk, tokenID0)
 61	assert.NotNil(t, err)
 62	assert.Equal(t, common.Idx(0), idxR)
 63	idxR, err = sdb.GetIdxByEthAddrBJJ(addr, pk2, tokenID0)
 64	assert.NotNil(t, err)
 65	assert.Equal(t, common.Idx(0), idxR)
 66
 67	// try to store bigger idx, will not affect as already exist a smaller
 68	// Idx for that Addr & BJJ
 69	err = sdb.setIdxByEthAddrBJJ(idx2, addr, pk, tokenID0)
 70	assert.Nil(t, err)
 71
 72	// store smaller idx
 73	err = sdb.setIdxByEthAddrBJJ(idx3, addr, pk, tokenID0)
 74	assert.Nil(t, err)
 75
 76	idxR, err = sdb.GetIdxByEthAddrBJJ(addr, pk, tokenID0)
 77	assert.Nil(t, err)
 78	assert.Equal(t, idx3, idxR)
 79
 80	// by EthAddr should work
 81	idxR, err = sdb.GetIdxByEthAddr(addr, tokenID0)
 82	assert.Nil(t, err)
 83	assert.Equal(t, idx3, idxR)
 84	// expect error when trying to get Idx by addr2 & pk2
 85	idxR, err = sdb.GetIdxByEthAddrBJJ(addr2, pk2, tokenID0)
 86	assert.NotNil(t, err)
 87	expectedErr := fmt.Errorf("GetIdxByEthAddrBJJ: %s: ToEthAddr: %s, ToBJJ: %s, TokenID: %d", ErrToIdxNotFound, addr2.Hex(), pk2, tokenID0)
 88	assert.Equal(t, expectedErr, tracerr.Unwrap(err))
 89	assert.Equal(t, common.Idx(0), idxR)
 90	// expect error when trying to get Idx by addr with not used TokenID
 91	_, err = sdb.GetIdxByEthAddr(addr, tokenID1)
 92	assert.NotNil(t, err)
 93}
 94
 95func TestBJJCompressedTo256BigInt(t *testing.T) {
 96	var pkComp babyjub.PublicKeyComp
 97	r := BJJCompressedTo256BigInts(pkComp)
 98	zero := big.NewInt(0)
 99	for i := 0; i < 256; i++ {
100		assert.Equal(t, zero, r[i])
101	}
102
103	pkComp[0] = 3
104	r = BJJCompressedTo256BigInts(pkComp)
105	one := big.NewInt(1)
106	for i := 0; i < 256; i++ {
107		if i != 0 && i != 1 {
108			assert.Equal(t, zero, r[i])
109		} else {
110			assert.Equal(t, one, r[i])
111		}
112	}
113
114	pkComp[31] = 4
115	r = BJJCompressedTo256BigInts(pkComp)
116	for i := 0; i < 256; i++ {
117		if i != 0 && i != 1 && i != 250 {
118			assert.Equal(t, zero, r[i])
119		} else {
120			assert.Equal(t, one, r[i])
121		}
122	}
123}