package cn.chain33.javasdk.utils;
import com.google.protobuf.ByteString;
import com.google.protobuf.InvalidProtocolBufferException;
import cn.chain33.javasdk.model.enums.StorageEnum;
import cn.chain33.javasdk.model.protobuf.StorageProtobuf;
import cn.chain33.javasdk.model.protobuf.TransactionProtoBuf;
import cn.chain33.javasdk.model.protobuf.StorageProtobuf.ContentOnlyNotaryStorage.Builder;
import cn.chain33.javasdk.model.protobuf.StorageProtobuf.EncryptNotaryStorage;
import cn.chain33.javasdk.model.protobuf.StorageProtobuf.EncryptShareNotaryStorage;
import cn.chain33.javasdk.model.protobuf.StorageProtobuf.HashOnlyNotaryStorage;
import cn.chain33.javasdk.model.protobuf.StorageProtobuf.LinkNotaryStorage;
import cn.chain33.javasdk.model.protobuf.StorageProtobuf.StorageAction;
public class StorageUtil {
/**
*
* @description 内容存证模型
* @param content 内容
* @return payload
*
*/
public static String createOnlyNotaryStorage(byte[] content, String execer, String privateKey) {
Builder contentOnlyNotaryStorageBuilder = StorageProtobuf.ContentOnlyNotaryStorage.newBuilder();
contentOnlyNotaryStorageBuilder.setContent(ByteString.copyFrom(content));//内容小于512k;
cn.chain33.javasdk.model.protobuf.StorageProtobuf.StorageAction.Builder storageActionBuilder = StorageProtobuf.StorageAction.newBuilder();
storageActionBuilder.setContentStorage(contentOnlyNotaryStorageBuilder.build());
storageActionBuilder.setTy(StorageEnum.ContentOnlyNotaryStorage.getTy());
StorageAction storageAction = storageActionBuilder.build();
String createTxWithoutSign = TransactionUtil.createTxWithoutSign(execer.getBytes(), storageAction.toByteArray(),
TransactionUtil.DEFAULT_FEE, 0);
byte[] fromHexString = HexUtil.fromHexString(createTxWithoutSign);
TransactionProtoBuf.Transaction parseFrom = null;
try {
parseFrom = TransactionProtoBuf.Transaction.parseFrom(fromHexString);
} catch (InvalidProtocolBufferException e) {
e.printStackTrace();
}
TransactionProtoBuf.Transaction signProbuf = TransactionUtil.signProbuf(parseFrom, privateKey);
String hexString = HexUtil.toHexString(signProbuf.toByteArray());
return hexString;
}
/**
*
* @description 哈希存证模型，推荐使用sha256哈希，限制256位得摘要值
* @param hash 长度固定为32字节
* @return payload
*
*/
public static String createHashStorage(byte[] hash, String execer, String privateKey) {
cn.chain33.javasdk.model.protobuf.StorageProtobuf.HashOnlyNotaryStorage.Builder hashStorageBuilder = StorageProtobuf.HashOnlyNotaryStorage.newBuilder();
hashStorageBuilder.setHash(ByteString.copyFrom(hash));
HashOnlyNotaryStorage hashOnlyNotaryStorage = hashStorageBuilder.build();
cn.chain33.javasdk.model.protobuf.StorageProtobuf.StorageAction.Builder storageActionBuilder = StorageProtobuf.StorageAction.newBuilder();
storageActionBuilder.setHashStorage(hashOnlyNotaryStorage);
storageActionBuilder.setTy(StorageEnum.HashOnlyNotaryStorage.getTy());
StorageAction storageAction = storageActionBuilder.build();
String createTxWithoutSign = TransactionUtil.createTxWithoutSign(execer.getBytes(), storageAction.toByteArray(),
TransactionUtil.DEFAULT_FEE, 0);
byte[] fromHexString = HexUtil.fromHexString(createTxWithoutSign);
TransactionProtoBuf.Transaction parseFrom = null;
try {
parseFrom = TransactionProtoBuf.Transaction.parseFrom(fromHexString);
} catch (InvalidProtocolBufferException e) {
e.printStackTrace();
}
TransactionProtoBuf.Transaction signProbuf = TransactionUtil.signProbuf(parseFrom, privateKey);
String hexString = HexUtil.toHexString(signProbuf.toByteArray());
return hexString;
}
/**
*
* @description 链接存证模型
* @param link 存证内容的链接，可以写入URL,或者其他可用于定位源文件得线索.
* @param hash 源文件得hash值，推荐使用sha256哈希，限制256位得摘要值
* @return
*
*/
public static String createLinkNotaryStorage(byte[] link,byte[] hash, String execer, String privateKey) {
cn.chain33.javasdk.model.protobuf.StorageProtobuf.LinkNotaryStorage.Builder storageBuilder = StorageProtobuf.LinkNotaryStorage.newBuilder();
storageBuilder.setLink(ByteString.copyFrom(link));
storageBuilder.setHash(ByteString.copyFrom(hash));
LinkNotaryStorage linkNotaryStorage = storageBuilder.build();
cn.chain33.javasdk.model.protobuf.StorageProtobuf.StorageAction.Builder storageActionBuilder = StorageProtobuf.StorageAction.newBuilder();
storageActionBuilder.setLinkStorage(linkNotaryStorage);
storageActionBuilder.setTy(StorageEnum.LinkNotaryStorage.getTy());
StorageAction storageAction = storageActionBuilder.build();
String createTxWithoutSign = TransactionUtil.createTxWithoutSign(execer.getBytes(), storageAction.toByteArray(),
TransactionUtil.DEFAULT_FEE, 0);
byte[] fromHexString = HexUtil.fromHexString(createTxWithoutSign);
TransactionProtoBuf.Transaction parseFrom = null;
try {
parseFrom = TransactionProtoBuf.Transaction.parseFrom(fromHexString);
} catch (InvalidProtocolBufferException e) {
e.printStackTrace();
}
TransactionProtoBuf.Transaction signProbuf = TransactionUtil.signProbuf(parseFrom, privateKey);
String hexString = HexUtil.toHexString(signProbuf.toByteArray());
return hexString;
}
/**
*
* @description 隐私存证模型，如果一个文件需要存证，且不公开内容，可以选择将源文件通过对称加密算法加密后上链
* @param encryptContent 存证明文内容的hash值，推荐使用sha256哈希，限制256位得摘要值
* @param contentHash 源文件的密文，由加密key及nonce对明文加密得到该值。
* @param nonce 加密iv，通过AES进行加密时制定随机生成的iv,解密时需要使用该值
* @return payload
*
*/
public static String createEncryptNotaryStorage(byte[] encryptContent,byte[] contentHash,byte[] nonce, String key,
String value, String execer, String privateKey) {
cn.chain33.javasdk.model.protobuf.StorageProtobuf.EncryptNotaryStorage.Builder storageBuilder = StorageProtobuf.EncryptNotaryStorage.newBuilder();
storageBuilder.setEncryptContent(ByteString.copyFrom(encryptContent));
storageBuilder.setContentHash(ByteString.copyFrom(contentHash));
storageBuilder.setNonce(ByteString.copyFrom(nonce));
storageBuilder.setKey(key);
storageBuilder.setValue(value);
EncryptNotaryStorage encryptNotaryStorage = storageBuilder.build();
cn.chain33.javasdk.model.protobuf.StorageProtobuf.StorageAction.Builder storageActionBuilder = StorageProtobuf.StorageAction.newBuilder();
storageActionBuilder.setEncryptStorage(encryptNotaryStorage);
storageActionBuilder.setTy(StorageEnum.EncryptNotaryStorage.getTy());
StorageAction storageAction = storageActionBuilder.build();
String createTxWithoutSign = TransactionUtil.createTxWithoutSign(execer.getBytes(), storageAction.toByteArray(),
TransactionUtil.DEFAULT_FEE, 0);
byte[] fromHexString = HexUtil.fromHexString(createTxWithoutSign);
TransactionProtoBuf.Transaction parseFrom = null;
try {
parseFrom = TransactionProtoBuf.Transaction.parseFrom(fromHexString);
} catch (InvalidProtocolBufferException e) {
e.printStackTrace();
}
TransactionProtoBuf.Transaction signProbuf = TransactionUtil.signProbuf(parseFrom, privateKey);
String hexString = HexUtil.toHexString(signProbuf.toByteArray());
return hexString;
}
/**
*
* @description 分享隐私存证模型
* @param contentHash 存证明文内容的hash值，推荐使用sha256哈希，限制256位的摘要值
* @param content 源文件的密文。
* @param nonce 加密iv，通过AES进行加密时制定随机生成的iv,解密时需要使用该值
* @param keyName 密钥的kdf推导路径。密钥tree父节点根据该路径可以推导出私钥key
* @param keyWrap 加密key的wrap key。加密key随机生成，对明文进行加密，该key有私密key进行key wrap后公开。使用时，通过私密key对wrap key解密得到加密key对密文进行解密。
* @return payload
*
*/
public static String createEncryptShareNotaryStorage(byte[] contentHash,byte[] content,byte[] nonce,byte[] keyName,byte[] keyWrap, String execer, String privateKey) {
cn.chain33.javasdk.model.protobuf.StorageProtobuf.EncryptShareNotaryStorage.Builder storageBuilder = StorageProtobuf.EncryptShareNotaryStorage.newBuilder();
storageBuilder.setContentHash(ByteString.copyFrom(contentHash));
storageBuilder.setEncryptContent(ByteString.copyFrom(content));
// storageBuilder.setKeyName(ByteString.copyFrom(keyName));
// storageBuilder.setNonce(ByteString.copyFrom(nonce));
// storageBuilder.setKeyWrap(ByteString.copyFrom(keyWrap));
EncryptShareNotaryStorage encryptShareNotaryStorage = storageBuilder.build();
cn.chain33.javasdk.model.protobuf.StorageProtobuf.StorageAction.Builder storageActionBuilder = StorageProtobuf.StorageAction.newBuilder();
storageActionBuilder.setEncryptShareStorage(encryptShareNotaryStorage);
storageActionBuilder.setTy(StorageEnum.EncryptShareNotaryStorage.getTy());
StorageAction storageAction = storageActionBuilder.build();
String createTxWithoutSign = TransactionUtil.createTxWithoutSign(execer.getBytes(), storageAction.toByteArray(),
TransactionUtil.DEFAULT_FEE, 0);
byte[] fromHexString = HexUtil.fromHexString(createTxWithoutSign);
TransactionProtoBuf.Transaction parseFrom = null;
try {
parseFrom = TransactionProtoBuf.Transaction.parseFrom(fromHexString);
} catch (InvalidProtocolBufferException e) {
e.printStackTrace();
}
TransactionProtoBuf.Transaction signProbuf = TransactionUtil.signProbuf(parseFrom, privateKey);
String hexString = HexUtil.toHexString(signProbuf.toByteArray());
return hexString;
}
}
