fix endianness

Author: ARR552

cmd/ulxly/balanceandnullifiertreehelper.go

@@ -2,6 +2,7 @@ package ulxly
 
 import (
 	"bytes"
+	"encoding/binary"
 	"fmt"
 	"math/big"
 	"strings"
@@ -289,3 +290,9 @@ func checkClaimCalldata(client *ethclient.Client, bridge common.Address, claimHa
 	}
 	return false, fmt.Errorf("claim not found")
 }
+
+func Uint32ToBytesLittleEndian(num uint32) []byte {
+	bytes := make([]byte, 4) // uint32 is 4 bytes
+	binary.LittleEndian.PutUint32(bytes, num)
+	return bytes
+}

cmd/ulxly/balanceandnullifiertreehelper_test.go

@@ -10,6 +10,7 @@ import (
 	"github.com/0xPolygon/polygon-cli/cmd/ulxly"
 	"github.com/0xPolygon/polygon-cli/cmd/ulxly/testvectors"
 	"github.com/ethereum/go-ethereum/common"
+	"github.com/ethereum/go-ethereum/crypto"
 	"github.com/stretchr/testify/assert"
 	"github.com/stretchr/testify/require"
 )
@@ -137,3 +138,12 @@ func TestTokenString(t *testing.T) {
 	assert.Equal(t, token2, newToken2)
 	assert.Equal(t, token2.String(), newToken2.String())
 }
+
+func TestCheckHash(t *testing.T) {
+	balanceTreeRoot := common.HexToHash("0xb89931f7384aeddb5c136a679d54464007e2d828d4741bec626ff92aeb4b12d4")
+	nullifierTreeRoot := common.HexToHash("0xe2c3ed4052eeb1d60514b4c38ece8d73a27f37fa5b36dcbf338e70de95798caa")
+	ler_counter := uint32(0)
+
+	initPessimisticRoot := crypto.Keccak256Hash(balanceTreeRoot.Bytes(), nullifierTreeRoot.Bytes(), ulxly.Uint32ToBytesLittleEndian(ler_counter))
+	assert.Equal(t, "0xc89c9c0f2ebd19afa9e5910097c43e56fb4aff3a06ddee8d7c9bae09bc769184", initPessimisticRoot.String())
+}

cmd/ulxly/ulxly.go

@@ -32,7 +32,6 @@ import (
 
 	"github.com/0xPolygon/polygon-cli/bindings/ulxly"
 	"github.com/0xPolygon/polygon-cli/bindings/ulxly/polygonrollupmanager"
-	"github.com/0xPolygon/polygon-cli/bindings/ulxly/polygonzkevmglobalexitrootl2"
 	"github.com/0xPolygon/polygon-cli/cmd/flag_loader"
 	"github.com/rs/zerolog/log"
 	"github.com/spf13/cobra"
@@ -373,20 +372,11 @@ func nullifierAndBalanceTree(args []string) error {
 	if err != nil {
 		return err
 	}
-	gerManagerAddress, err := bridgeV2.GlobalExitRootManager(&bind.CallOpts{Pending: false})
+	ler_count, err := bridgeV2.LastUpdatedDepositCount(&bind.CallOpts{Pending: false})
 	if err != nil {
 		return err
 	}
-	gerManager, err := polygonzkevmglobalexitrootl2.NewPolygonzkevmglobalexitrootl2(gerManagerAddress, client)
-	if err != nil {
-		return err
-	}
-	var ler common.Hash
-	ler, err = gerManager.LastRollupExitRoot(&bind.CallOpts{Pending: false})
-	if err != nil {
-		return err
-	}
-	log.Info().Msgf("Last Local Exit Root: %s", ler.String())
+	log.Info().Msgf("Last LER count: %d", ler_count)
 	balanceTreeRoot, err := computeBalanceTree(client, bridgeAddress, l2RawClaimsData, l2NetworkID, l2RawDepositsData)
 	if err != nil {
 		return err
@@ -395,7 +385,7 @@ func nullifierAndBalanceTree(args []string) error {
 	if err != nil {
 		return err
 	}
-	initPessimisticRoot := crypto.Keccak256Hash(balanceTreeRoot.Bytes(), nullifierTreeRoot.Bytes(), ler.Bytes())
+	initPessimisticRoot := crypto.Keccak256Hash(balanceTreeRoot.Bytes(), nullifierTreeRoot.Bytes(), Uint32ToBytesLittleEndian(ler_count))
 	fmt.Printf(`
 	{
 		"balanceTreeRoot": "%s",