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package statedb
import (
"io/ioutil"
"math/big"
"testing"
ethCommon "github.com/ethereum/go-ethereum/common"
"github.com/hermeznetwork/hermez-node/common"
"github.com/iden3/go-iden3-crypto/babyjub"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
func TestGetIdx(t *testing.T) {
dir, err := ioutil.TempDir("", "tmpdb")
require.Nil(t, err)
sdb, err := NewStateDB(dir, TypeTxSelector, 0)
assert.Nil(t, err)
var sk babyjub.PrivateKey
copy(sk[:], []byte("1234")) // only for testing
pk := sk.Public()
var sk2 babyjub.PrivateKey
copy(sk2[:], []byte("12345")) // only for testing
pk2 := sk2.Public()
addr := ethCommon.HexToAddress("0x74E803744B7EEFc272E852f89a05D41515d431f2")
addr2 := ethCommon.HexToAddress("0x54A0706531cEa2ee8F09bAd22f604e377bb56948")
idx := common.Idx(1234)
idx2 := common.Idx(12345)
idx3 := common.Idx(1233)
// store the keys for idx by Addr & BJJ
err = sdb.setIdxByEthAddrBJJ(idx, addr, pk)
require.Nil(t, err)
idxR, err := sdb.GetIdxByEthAddrBJJ(addr, pk)
assert.Nil(t, err)
assert.Equal(t, idx, idxR)
// expect error when getting only by EthAddr, as value does not exist
// in the db for only EthAddr
_, err = sdb.GetIdxByEthAddr(addr)
assert.Nil(t, err)
_, err = sdb.GetIdxByEthAddr(addr2)
assert.NotNil(t, err)
// expect to fail
idxR, err = sdb.GetIdxByEthAddrBJJ(addr2, pk)
assert.NotNil(t, err)
assert.Equal(t, common.Idx(0), idxR)
idxR, err = sdb.GetIdxByEthAddrBJJ(addr, pk2)
assert.NotNil(t, err)
assert.Equal(t, common.Idx(0), idxR)
// try to store bigger idx, will not affect as already exist a smaller
// Idx for that Addr & BJJ
err = sdb.setIdxByEthAddrBJJ(idx2, addr, pk)
assert.Nil(t, err)
// store smaller idx
err = sdb.setIdxByEthAddrBJJ(idx3, addr, pk)
assert.Nil(t, err)
idxR, err = sdb.GetIdxByEthAddrBJJ(addr, pk)
assert.Nil(t, err)
assert.Equal(t, idx3, idxR)
// by EthAddr should work
idxR, err = sdb.GetIdxByEthAddr(addr)
assert.Nil(t, err)
assert.Equal(t, idx3, idxR)
// expect error when trying to get Idx by addr2 & pk2
idxR, err = sdb.GetIdxByEthAddrBJJ(addr2, pk2)
assert.NotNil(t, err)
assert.Equal(t, ErrToIdxNotFound, err)
assert.Equal(t, common.Idx(0), idxR)
}
func TestBJJCompressedTo256BigInt(t *testing.T) {
var pkComp babyjub.PublicKeyComp
r := BJJCompressedTo256BigInts(pkComp)
zero := big.NewInt(0)
for i := 0; i < 256; i++ {
assert.Equal(t, zero, r[i])
}
pkComp[0] = 3
r = BJJCompressedTo256BigInts(pkComp)
one := big.NewInt(1)
for i := 0; i < 256; i++ {
if i != 0 && i != 1 {
assert.Equal(t, zero, r[i])
} else {
assert.Equal(t, one, r[i])
}
}
pkComp[31] = 4
r = BJJCompressedTo256BigInts(pkComp)
for i := 0; i < 256; i++ {
if i != 0 && i != 1 && i != 250 {
assert.Equal(t, zero, r[i])
} else {
assert.Equal(t, one, r[i])
}
}
}