1package common
  2
  3import (
  4	"encoding/hex"
  5	"math/big"
  6	"testing"
  7
  8	ethCommon "github.com/ethereum/go-ethereum/common"
  9	"github.com/iden3/go-iden3-crypto/babyjub"
 10	"github.com/stretchr/testify/assert"
 11)
 12
 13func TestNewPoolL2Tx(t *testing.T) {
 14	poolL2Tx := &PoolL2Tx{
 15		FromIdx: 87654,
 16		ToIdx:   300,
 17		Amount:  big.NewInt(4),
 18		TokenID: 5,
 19		Nonce:   144,
 20	}
 21	poolL2Tx, err := NewPoolL2Tx(poolL2Tx)
 22	assert.Nil(t, err)
 23	assert.Equal(t, "0x020000000156660000000090", poolL2Tx.TxID.String())
 24}
 25
 26func TestTxCompressedData(t *testing.T) {
 27	var sk babyjub.PrivateKey
 28	_, err := hex.Decode(sk[:], []byte("0001020304050607080900010203040506070809000102030405060708090001"))
 29	assert.Nil(t, err)
 30	tx := PoolL2Tx{
 31		FromIdx: 2,
 32		ToIdx:   3,
 33		Amount:  big.NewInt(4),
 34		TokenID: 5,
 35		Nonce:   6,
 36		ToBJJ:   sk.Public(),
 37	}
 38	txCompressedData, err := tx.TxCompressedData()
 39	assert.Nil(t, err)
 40	// test vector value generated from javascript implementation
 41	expectedStr := "1766847064778421992193717128424891165872736891548909569553540449389241871"
 42	assert.Equal(t, expectedStr, txCompressedData.String())
 43	expected, ok := new(big.Int).SetString(expectedStr, 10)
 44	assert.True(t, ok)
 45	assert.Equal(t, expected.Bytes(), txCompressedData.Bytes())
 46	assert.Equal(t, "10000000000060000000500040000000000030000000000020001c60be60f", hex.EncodeToString(txCompressedData.Bytes())[1:])
 47	tx = PoolL2Tx{
 48		RqFromIdx: 7,
 49		RqToIdx:   8,
 50		RqAmount:  big.NewInt(9),
 51		RqTokenID: 10,
 52		RqNonce:   11,
 53		RqFee:     12,
 54		RqToBJJ:   sk.Public(),
 55	}
 56	txCompressedData, err = tx.RqTxCompressedDataV2()
 57	assert.Nil(t, err)
 58	// test vector value generated from javascript implementation
 59	expectedStr = "6571340879233176732837827812956721483162819083004853354503"
 60	assert.Equal(t, expectedStr, txCompressedData.String())
 61	expected, ok = new(big.Int).SetString(expectedStr, 10)
 62	assert.True(t, ok)
 63	assert.Equal(t, expected.Bytes(), txCompressedData.Bytes())
 64	assert.Equal(t, "10c000000000b0000000a0009000000000008000000000007", hex.EncodeToString(txCompressedData.Bytes())[1:])
 65}
 66
 67func TestHashToSign(t *testing.T) {
 68	var sk babyjub.PrivateKey
 69	_, err := hex.Decode(sk[:], []byte("0001020304050607080900010203040506070809000102030405060708090001"))
 70	assert.Nil(t, err)
 71	tx := PoolL2Tx{
 72		FromIdx:     2,
 73		ToIdx:       3,
 74		Amount:      big.NewInt(4),
 75		TokenID:     5,
 76		Nonce:       6,
 77		ToBJJ:       sk.Public(),
 78		RqToEthAddr: ethCommon.HexToAddress("0xc58d29fA6e86E4FAe04DDcEd660d45BCf3Cb2370"),
 79		RqToBJJ:     sk.Public(),
 80	}
 81	toSign, err := tx.HashToSign()
 82	assert.Nil(t, err)
 83	assert.Equal(t, "13412877307445712067533842795279849753265998687662992184595695642580679868064", toSign.String())
 84}
 85
 86func TestVerifyTxSignature(t *testing.T) {
 87	var sk babyjub.PrivateKey
 88	_, err := hex.Decode(sk[:], []byte("0001020304050607080900010203040506070809000102030405060708090001"))
 89	assert.Nil(t, err)
 90	tx := PoolL2Tx{
 91		FromIdx:     2,
 92		ToIdx:       3,
 93		Amount:      big.NewInt(4),
 94		TokenID:     5,
 95		Nonce:       6,
 96		ToBJJ:       sk.Public(),
 97		RqToEthAddr: ethCommon.HexToAddress("0xc58d29fA6e86E4FAe04DDcEd660d45BCf3Cb2370"),
 98		RqToBJJ:     sk.Public(),
 99	}
100	toSign, err := tx.HashToSign()
101	assert.Nil(t, err)
102	assert.Equal(t, "13412877307445712067533842795279849753265998687662992184595695642580679868064", toSign.String())
103
104	sig := sk.SignPoseidon(toSign)
105	tx.Signature = sig.Compress()
106	assert.True(t, tx.VerifySignature(sk.Public()))
107}