/*

* java-tron is free software: you can redistribute it and/or modify

* it under the terms of the GNU General Public License as published by

* the Free Software Foundation, either version 3 of the License, or

* (at your option) any later version.

*

* java-tron is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

* GNU General Public License for more details.

*

* You should have received a copy of the GNU General Public License

* along with this program. If not, see <http://www.gnu.org/licenses/>.

*/

package org.tron.common.utils;

import com.google.protobuf.ByteString;

import java.util.Collection;

import java.util.List;

import java.util.stream.Collectors;

import org.tron.core.Wallet;

public class StringUtil {

/**

* n-bits hex string.

*

* @param str target string

* @param bits string bits

*/

public static boolean isHexString(String str, int bits) {

String regex = String.format("^[A-Fa-f0-9]{%d}$", bits);

return str.matches(regex);

}

public static byte[] createDbKey(ByteString string) {

return string.toByteArray();

}

public static String createReadableString(byte[] bytes) {

return ByteArray.toHexString(bytes);

}

public static String createReadableString(ByteString string) {

return createReadableString(string.toByteArray());

}

public static List<String> getAddressStringList(Collection<ByteString> collection) {

return collection.stream()

.map(bytes -> Wallet.encode58Check(bytes.toByteArray()))

.collect(Collectors.toList());

}

public static List<String> getAddressStringListFromByteArray(Collection<byte[]> collection) {

return collection.stream()

.map(bytes -> createReadableString(bytes))

.collect(Collectors.toList());

}

public static ByteString hexString2ByteString(String hexString) {

return ByteString.copyFrom(ByteArray.fromHexString(hexString));

}

}