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There is a newer version: 1.20.40-r1

package cn.nukkit.network;

import cn.nukkit.api.PowerNukkitXOnly;
import cn.nukkit.api.Since;
import cn.nukkit.network.protocol.types.PacketCompressionAlgorithm;
import cn.nukkit.utils.BinaryStream;

@Since("1.19.30-r1")
@PowerNukkitXOnly
public interface CompressionProvider {

    CompressionProvider NONE = new CompressionProvider() {
        @Override
        public byte[] compress(BinaryStream packet, int level) throws Exception {
            return packet.getBuffer();
        }

        @Override
        public byte[] decompress(byte[] compressed) throws Exception {
            return compressed;
        }
    };

    CompressionProvider ZLIB = new CompressionProvider() {
        @Override
        public byte[] compress(BinaryStream packet, int level) throws Exception {
            return Network.deflateRaw(packet.getBuffer(), level);
        }

        @Override
        public byte[] decompress(byte[] compressed) throws Exception {
            return Network.inflateRaw(compressed);
        }
    };


    byte[] compress(BinaryStream packet, int level) throws Exception;

    byte[] decompress(byte[] compressed) throws Exception;

    static CompressionProvider from(PacketCompressionAlgorithm algorithm) {
        if (algorithm == null) {
            return NONE;
        } else if (algorithm == PacketCompressionAlgorithm.ZLIB) {
            return ZLIB;
        }
        throw new UnsupportedOperationException();
    }
}