org.bitcoinj.wallet.WalletProtobufSerializer Maven / Gradle / Ivy
/*
* Copyright 2012 Google Inc.
* Copyright 2014 Andreas Schildbach
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.bitcoinj.wallet;
import org.bitcoinj.core.*;
import org.bitcoinj.core.TransactionConfidence.ConfidenceType;
import org.bitcoinj.crypto.BLSLazySignature;
import org.bitcoinj.crypto.KeyCrypter;
import org.bitcoinj.crypto.KeyCrypterScrypt;
import org.bitcoinj.crypto.factory.BLSKeyFactory;
import org.bitcoinj.crypto.factory.ECKeyFactory;
import org.bitcoinj.crypto.factory.Ed25519KeyFactory;
import org.bitcoinj.crypto.factory.KeyFactory;
import org.bitcoinj.quorums.InstantSendLock;
import org.bitcoinj.script.Script;
import org.bitcoinj.script.ScriptException;
import org.bitcoinj.utils.ExchangeRate;
import org.bitcoinj.utils.Fiat;
import org.bitcoinj.wallet.Protos.Wallet.EncryptionType;
import com.google.common.collect.Lists;
import com.google.protobuf.ByteString;
import com.google.protobuf.CodedInputStream;
import com.google.protobuf.CodedOutputStream;
import com.google.protobuf.WireFormat;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import javax.annotation.Nullable;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.math.BigInteger;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.*;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* Serialize and de-serialize a wallet to a byte stream containing a
* protocol buffer. Protocol buffers are
* a data interchange format developed by Google with an efficient binary representation, a type safe specification
* language and compilers that generate code to work with those data structures for many languages. Protocol buffers
* can have their format evolved over time: conceptually they represent data using (tag, length, value) tuples. The
* format is defined by the {@code wallet.proto} file in the bitcoinj source distribution.
*
* This class is used through its static methods. The most common operations are writeWallet and readWallet, which do
* the obvious operations on Output/InputStreams. You can use a {@link ByteArrayInputStream} and equivalent
* {@link ByteArrayOutputStream} if you'd like byte arrays instead. The protocol buffer can also be manipulated
* in its object form if you'd like to modify the flattened data structure before serialization to binary.
*
* You can extend the wallet format with additional fields specific to your application if you want, but make sure
* to either put the extra data in the provided extension areas, or select tag numbers that are unlikely to be used
* by anyone else.
*
* @author Miron Cuperman
* @author Andreas Schildbach
*/
public class WalletProtobufSerializer {
private static final Logger log = LoggerFactory.getLogger(WalletProtobufSerializer.class);
/** Current version used for serializing wallets. A version higher than this is considered from the future. */
public static final int CURRENT_WALLET_VERSION = Protos.Wallet.getDefaultInstance().getVersion();
// 512 MB
private static final int WALLET_SIZE_LIMIT = 512 * 1024 * 1024;
// Used for de-serialization
protected Map txMap;
private boolean requireMandatoryExtensions = true;
private boolean requireAllExtensionsKnown = false;
private int walletWriteBufferSize = CodedOutputStream.DEFAULT_BUFFER_SIZE;
public interface WalletFactory {
Wallet create(NetworkParameters params, KeyChainGroup keyChainGroup);
}
private final WalletFactory factory;
private KeyChainFactory keyChainFactory;
public WalletProtobufSerializer() {
this(new WalletFactory() {
@Override
public Wallet create(NetworkParameters params, KeyChainGroup keyChainGroup) {
return new WalletEx(params, keyChainGroup);
}
});
}
public WalletProtobufSerializer(WalletFactory factory) {
txMap = new HashMap<>();
this.factory = factory;
this.keyChainFactory = new DefaultKeyChainFactory();
}
public void setKeyChainFactory(KeyChainFactory keyChainFactory) {
this.keyChainFactory = keyChainFactory;
}
/**
* If this property is set to false, then unknown mandatory extensions will be ignored instead of causing load
* errors. You should only use this if you know exactly what you are doing, as the extension data will NOT be
* round-tripped, possibly resulting in a corrupted wallet if you save it back out again.
*/
public void setRequireMandatoryExtensions(boolean value) {
requireMandatoryExtensions = value;
}
/**
* If this property is set to true, the wallet will fail to load if any found extensions are unknown..
*/
public void setRequireAllExtensionsKnown(boolean value) {
requireAllExtensionsKnown = value;
}
/**
* Change buffer size for writing wallet to output stream. Default is {@link com.google.protobuf.CodedOutputStream#DEFAULT_BUFFER_SIZE}
* @param walletWriteBufferSize - buffer size in bytes
*/
public void setWalletWriteBufferSize(int walletWriteBufferSize) {
this.walletWriteBufferSize = walletWriteBufferSize;
}
/**
* Formats the given wallet (transactions and keys) to the given output stream in protocol buffer format.
*
* Equivalent to {@code walletToProto(wallet).writeTo(output);}
*/
public void writeWallet(Wallet wallet, OutputStream output) throws IOException {
Protos.Wallet walletProto = walletToProto(wallet);
final CodedOutputStream codedOutput = CodedOutputStream.newInstance(output, this.walletWriteBufferSize);
walletProto.writeTo(codedOutput);
codedOutput.flush();
}
/**
* Returns the given wallet formatted as text. The text format is that used by protocol buffers and
* it is designed more for debugging than storage. It is not well specified and wallets are largely binary data
* structures anyway, consisting as they do of keys (large random numbers) and {@link Transaction}s which also
* mostly contain keys and hashes.
*/
public String walletToText(Wallet wallet) {
Protos.Wallet walletProto = walletToProto(wallet);
return walletProto.toString();
}
/**
* Converts the given wallet to the object representation of the protocol buffers. This can be modified, or
* additional data fields set, before serialization takes place.
*/
public Protos.Wallet walletToProto(Wallet wallet) {
Protos.Wallet.Builder walletBuilder = Protos.Wallet.newBuilder();
walletBuilder.setNetworkIdentifier(wallet.getNetworkParameters().getId());
if (wallet.getDescription() != null) {
walletBuilder.setDescription(wallet.getDescription());
}
for (WalletTransaction wtx : wallet.getWalletTransactions()) {
Protos.Transaction txProto = makeTxProto(wtx);
walletBuilder.addTransaction(txProto);
}
walletBuilder.addAllKey(wallet.serializeKeyChainGroupToProtobuf());
for (Script script : wallet.getWatchedScripts()) {
Protos.Script protoScript =
Protos.Script.newBuilder()
.setProgram(ByteString.copyFrom(script.getProgram()))
.setCreationTimestamp(script.getCreationTimeSeconds() * 1000)
.build();
walletBuilder.addWatchedScript(protoScript);
}
// Populate the lastSeenBlockHash field.
Sha256Hash lastSeenBlockHash = wallet.getLastBlockSeenHash();
if (lastSeenBlockHash != null) {
walletBuilder.setLastSeenBlockHash(hashToByteString(lastSeenBlockHash));
walletBuilder.setLastSeenBlockHeight(wallet.getLastBlockSeenHeight());
}
if (wallet.getLastBlockSeenTimeSecs() > 0)
walletBuilder.setLastSeenBlockTimeSecs(wallet.getLastBlockSeenTimeSecs());
// Populate the scrypt parameters.
KeyCrypter keyCrypter = wallet.getKeyCrypter();
if (keyCrypter == null) {
// The wallet is unencrypted.
walletBuilder.setEncryptionType(EncryptionType.UNENCRYPTED);
} else {
// The wallet is encrypted.
walletBuilder.setEncryptionType(keyCrypter.getUnderstoodEncryptionType());
if (keyCrypter instanceof KeyCrypterScrypt) {
KeyCrypterScrypt keyCrypterScrypt = (KeyCrypterScrypt) keyCrypter;
walletBuilder.setEncryptionParameters(keyCrypterScrypt.getScryptParameters());
} else {
// Some other form of encryption has been specified that we do not know how to persist.
throw new RuntimeException("The wallet has encryption of type '" + keyCrypter.getUnderstoodEncryptionType() + "' but this WalletProtobufSerializer does not know how to persist this.");
}
}
if (wallet.getKeyRotationTime() != null) {
long timeSecs = wallet.getKeyRotationTime().getTime() / 1000;
walletBuilder.setKeyRotationTime(timeSecs);
}
populateExtensions(wallet, walletBuilder);
for (Map.Entry entry : wallet.getTags().entrySet()) {
Protos.Tag.Builder tag = Protos.Tag.newBuilder().setTag(entry.getKey()).setData(entry.getValue());
walletBuilder.addTags(tag);
}
// Populate the wallet version.
walletBuilder.setVersion(wallet.getVersion());
//Add FriendKeyChains: Receiving
if(wallet.receivingFromFriendsGroup != null && wallet.receivingFromFriendsGroup.hasKeyChains()) {
List keys = wallet.receivingFromFriendsGroup.serializeToProtobuf();
walletBuilder.addAllKeysForFriends(keys);
}
//Add FriendKeyChains: Sending
if(wallet.sendingToFriendsGroup != null && wallet.sendingToFriendsGroup.hasKeyChains()) {
List keys = wallet.sendingToFriendsGroup.serializeToProtobuf();
walletBuilder.addAllKeysFromFriends(keys);
}
return walletBuilder.build();
}
private static void populateExtensions(Wallet wallet, Protos.Wallet.Builder walletBuilder) {
for (WalletExtension extension : wallet.getExtensions().values()) {
Protos.Extension.Builder proto = Protos.Extension.newBuilder();
proto.setId(extension.getWalletExtensionID());
proto.setMandatory(extension.isWalletExtensionMandatory());
proto.setData(ByteString.copyFrom(extension.serializeWalletExtension()));
walletBuilder.addExtension(proto);
}
for (KeyChainGroupExtension extension : wallet.getKeyChainExtensions().values()) {
Protos.Extension.Builder proto = Protos.Extension.newBuilder();
proto.setId(extension.getWalletExtensionID());
proto.setMandatory(extension.isWalletExtensionMandatory());
proto.setData(ByteString.copyFrom(extension.serializeWalletExtension()));
walletBuilder.addExtension(proto);
}
}
private static Protos.Transaction makeTxProto(WalletTransaction wtx) {
Transaction tx = wtx.getTransaction();
Protos.Transaction.Builder txBuilder = Protos.Transaction.newBuilder();
txBuilder.setPool(getProtoPool(wtx))
.setHash(hashToByteString(tx.getTxId()))
.setVersion((int) tx.getVersion());
if (tx.getUpdateTime() != null) {
txBuilder.setUpdatedAt(tx.getUpdateTime().getTime());
}
if (tx.getLockTime() > 0) {
txBuilder.setLockTime((int)tx.getLockTime());
}
// Handle inputs.
for (TransactionInput input : tx.getInputs()) {
Protos.TransactionInput.Builder inputBuilder = Protos.TransactionInput.newBuilder()
.setScriptBytes(ByteString.copyFrom(input.getScriptBytes()))
.setTransactionOutPointHash(hashToByteString(input.getOutpoint().getHash()))
.setTransactionOutPointIndex((int) input.getOutpoint().getIndex());
if (input.hasSequence())
inputBuilder.setSequence((int) input.getSequenceNumber());
if (input.getValue() != null)
inputBuilder.setValue(input.getValue().value);
txBuilder.addTransactionInput(inputBuilder);
}
// Handle outputs.
for (TransactionOutput output : tx.getOutputs()) {
Protos.TransactionOutput.Builder outputBuilder = Protos.TransactionOutput.newBuilder()
.setScriptBytes(ByteString.copyFrom(output.getScriptBytes()))
.setValue(output.getValue().value);
final TransactionInput spentBy = output.getSpentBy();
if (spentBy != null) {
Sha256Hash spendingHash = spentBy.getParentTransaction().getTxId();
outputBuilder.setSpentByTransactionHash(hashToByteString(spendingHash))
.setSpentByTransactionIndex(spentBy.getIndex());
}
txBuilder.addTransactionOutput(outputBuilder);
}
// Handle which blocks tx was seen in.
final Map appearsInHashes = tx.getAppearsInHashes();
if (appearsInHashes != null) {
for (Map.Entry entry : appearsInHashes.entrySet()) {
txBuilder.addBlockHash(hashToByteString(entry.getKey()));
txBuilder.addBlockRelativityOffsets(entry.getValue());
}
}
if (tx.hasConfidence()) {
TransactionConfidence confidence = tx.getConfidence();
Protos.TransactionConfidence.Builder confidenceBuilder = Protos.TransactionConfidence.newBuilder();
writeConfidence(txBuilder, confidence, confidenceBuilder);
}
Protos.Transaction.Purpose purpose;
switch (tx.getPurpose()) {
case UNKNOWN: purpose = Protos.Transaction.Purpose.UNKNOWN; break;
case USER_PAYMENT: purpose = Protos.Transaction.Purpose.USER_PAYMENT; break;
case KEY_ROTATION: purpose = Protos.Transaction.Purpose.KEY_ROTATION; break;
case ASSURANCE_CONTRACT_CLAIM: purpose = Protos.Transaction.Purpose.ASSURANCE_CONTRACT_CLAIM; break;
case ASSURANCE_CONTRACT_PLEDGE: purpose = Protos.Transaction.Purpose.ASSURANCE_CONTRACT_PLEDGE; break;
case ASSURANCE_CONTRACT_STUB: purpose = Protos.Transaction.Purpose.ASSURANCE_CONTRACT_STUB; break;
case RAISE_FEE: purpose = Protos.Transaction.Purpose.RAISE_FEE; break;
default:
throw new RuntimeException("New tx purpose serialization not implemented.");
}
txBuilder.setPurpose(purpose);
ExchangeRate exchangeRate = tx.getExchangeRate();
if (exchangeRate != null) {
Protos.ExchangeRate.Builder exchangeRateBuilder = Protos.ExchangeRate.newBuilder()
.setCoinValue(exchangeRate.coin.value).setFiatValue(exchangeRate.fiat.value)
.setFiatCurrencyCode(exchangeRate.fiat.currencyCode);
txBuilder.setExchangeRate(exchangeRateBuilder);
}
if (tx.getMemo() != null)
txBuilder.setMemo(tx.getMemo());
byte [] extraPayload = tx.getExtraPayload();
if(extraPayload != null && extraPayload.length > 0)
txBuilder.setExtraPayload(ByteString.copyFrom(extraPayload));
return txBuilder.build();
}
private static Protos.Transaction.Pool getProtoPool(WalletTransaction wtx) {
switch (wtx.getPool()) {
case UNSPENT: return Protos.Transaction.Pool.UNSPENT;
case SPENT: return Protos.Transaction.Pool.SPENT;
case DEAD: return Protos.Transaction.Pool.DEAD;
case PENDING: return Protos.Transaction.Pool.PENDING;
default:
throw new RuntimeException("Unreachable");
}
}
private static void writeConfidence(Protos.Transaction.Builder txBuilder,
TransactionConfidence confidence,
Protos.TransactionConfidence.Builder confidenceBuilder) {
synchronized (confidence) {
confidenceBuilder.setType(Protos.TransactionConfidence.Type.forNumber(confidence.getConfidenceType().getValue()));
if (confidence.getConfidenceType() == ConfidenceType.BUILDING) {
confidenceBuilder.setAppearedAtHeight(confidence.getAppearedAtChainHeight());
confidenceBuilder.setDepth(confidence.getDepthInBlocks());
}
if (confidence.getConfidenceType() == ConfidenceType.DEAD) {
// Copy in the overriding transaction, if available.
// (A dead coinbase transaction has no overriding transaction).
if (confidence.getOverridingTransaction() != null) {
Sha256Hash overridingHash = confidence.getOverridingTransaction().getTxId();
confidenceBuilder.setOverridingTransaction(hashToByteString(overridingHash));
}
}
TransactionConfidence.Source source = confidence.getSource();
switch (source) {
case SELF: confidenceBuilder.setSource(Protos.TransactionConfidence.Source.SOURCE_SELF); break;
case NETWORK: confidenceBuilder.setSource(Protos.TransactionConfidence.Source.SOURCE_NETWORK); break;
case UNKNOWN:
// Fall through.
default:
confidenceBuilder.setSource(Protos.TransactionConfidence.Source.SOURCE_UNKNOWN); break;
}
TransactionConfidence.IXType ixType = confidence.getIXType();
switch(ixType)
{
case IX_LOCKED: confidenceBuilder.setIxType(Protos.TransactionConfidence.IXType.IX_LOCKED); break;
case IX_REQUEST: confidenceBuilder.setIxType(Protos.TransactionConfidence.IXType.IX_REQUEST); break;
case IX_LOCK_FAILED: confidenceBuilder.setIxType(Protos.TransactionConfidence.IXType.IX_LOCK_FAILED); break;
case IX_NONE:
default: confidenceBuilder.setIxType(Protos.TransactionConfidence.IXType.IX_NONE); break;
}
InstantSendLock isLock = confidence.getInstantSendlock();
if (isLock != null) {
Protos.InstantSendLock.Builder isLockProto = Protos.InstantSendLock.newBuilder();
for (TransactionOutPoint input: isLock.getInputs()) {
isLockProto.addInputs(Protos.TransactionOutput.newBuilder()
.setSpentByTransactionIndex((int)input.getIndex())
.setValue(0)
.setSpentByTransactionHash(ByteString.copyFrom(input.getHash().getBytes()))
.setScriptBytes(ByteString.EMPTY)
.build());
}
isLockProto.setSignature(ByteString.copyFrom(isLock.getSignature().bitcoinSerialize()));
isLockProto.setTxid(ByteString.copyFrom(isLock.getHash().getBytes()));
}
}
for (PeerAddress address : confidence.getBroadcastBy()) {
Protos.PeerAddress proto = Protos.PeerAddress.newBuilder()
.setIpAddress(ByteString.copyFrom(address.getAddr().getAddress()))
.setPort(address.getPort())
.setServices(address.getServices().longValue())
.build();
confidenceBuilder.addBroadcastBy(proto);
}
Date lastBroadcastedAt = confidence.getLastBroadcastedAt();
if (lastBroadcastedAt != null)
confidenceBuilder.setLastBroadcastedAt(lastBroadcastedAt.getTime());
confidenceBuilder.setMinConnections(confidence.getMinConnections());
confidenceBuilder.setPeerCount(confidence.getPeerCount());
Date sentAt = confidence.getSentAt();
if(sentAt != null)
confidenceBuilder.setSentTime(sentAt.getTime());
if(confidence.hasRejections()) {
Protos.RejectMessage.Builder builder = Protos.RejectMessage.newBuilder();
for(Map.Entry entry : confidence.getRejections().entrySet()) {
Protos.RejectMessage.RejectCode code;
RejectMessage reject = entry.getValue();
switch(entry.getValue().getReasonCode()) {
case MALFORMED:
code = Protos.RejectMessage.RejectCode.MALFORMED;
break;
case INVALID:
code = Protos.RejectMessage.RejectCode.INVALID;
break;
case INSUFFICIENTFEE:
code = Protos.RejectMessage.RejectCode.INSUFFICIENTFEE;
break;
case DUPLICATE:
code = Protos.RejectMessage.RejectCode.DUPLICATE;
break;
case DUST:
code = Protos.RejectMessage.RejectCode.DUST;
break;
case OBSOLETE:
code = Protos.RejectMessage.RejectCode.OBSOLETE;
break;
case NONSTANDARD:
code = Protos.RejectMessage.RejectCode.NONSTANDARD;
break;
case OTHER:
default:
code = Protos.RejectMessage.RejectCode.OTHER;
break;
}
builder.setCode(code);
builder.setMessage(reject.getRejectedMessage());
builder.setReason(reject.getReasonString());
PeerAddress address = entry.getKey();
Protos.PeerAddress peerProto = Protos.PeerAddress.newBuilder()
.setIpAddress(ByteString.copyFrom(address.getAddr().getAddress()))
.setPort(address.getPort())
.setServices(address.getServices().longValue())
.build();
builder.setPeer(peerProto);
confidenceBuilder.addRejects(builder.build());
}
}
txBuilder.setConfidence(confidenceBuilder);
}
public static ByteString hashToByteString(Sha256Hash hash) {
return ByteString.copyFrom(hash.getBytes());
}
public static Sha256Hash byteStringToHash(ByteString bs) {
return Sha256Hash.wrap(bs.toByteArray());
}
/**
* Loads wallet data from the given protocol buffer and inserts it into the given Wallet object. This is primarily
* useful when you wish to pre-register extension objects. Note that if loading fails the provided Wallet object
* may be in an indeterminate state and should be thrown away.
*
* A wallet can be unreadable for various reasons, such as inability to open the file, corrupt data, internally
* inconsistent data, a wallet extension marked as mandatory that cannot be handled and so on. You should always
* handle {@link UnreadableWalletException} and communicate failure to the user in an appropriate manner.
*
* @throws UnreadableWalletException thrown in various error conditions (see description).
*/
public Wallet readWallet(InputStream input, @Nullable WalletExtension... walletExtensions) throws UnreadableWalletException {
return readWallet(input, false, walletExtensions);
}
/**
* Loads wallet data from the given protocol buffer and inserts it into the given Wallet object. This is primarily
* useful when you wish to pre-register extension objects. Note that if loading fails the provided Wallet object
* may be in an indeterminate state and should be thrown away. Do not simply call this method again on the same
* Wallet object with {@code forceReset} set {@code true}. It won't work.
*
* If {@code forceReset} is {@code true}, then no transactions are loaded from the wallet, and it is configured
* to replay transactions from the blockchain (as if the wallet had been loaded and {@link Wallet#reset()}
* had been called immediately thereafter).
*
*
A wallet can be unreadable for various reasons, such as inability to open the file, corrupt data, internally
* inconsistent data, a wallet extension marked as mandatory that cannot be handled and so on. You should always
* handle {@link UnreadableWalletException} and communicate failure to the user in an appropriate manner.
*
* @throws UnreadableWalletException thrown in various error conditions (see description).
*/
public Wallet readWallet(InputStream input, boolean forceReset, @Nullable WalletExtension[] extensions) throws UnreadableWalletException {
try {
Protos.Wallet walletProto = parseToProto(input);
final String paramsID = walletProto.getNetworkIdentifier();
NetworkParameters params = NetworkParameters.fromID(paramsID);
if (params == null)
throw new UnreadableWalletException("Unknown network parameters ID " + paramsID);
return readWallet(params, extensions, walletProto, forceReset);
} catch (IOException e) {
throw new UnreadableWalletException("Could not parse input stream to protobuf", e);
} catch (IllegalStateException e) {
throw new UnreadableWalletException("Could not parse input stream to protobuf", e);
} catch (IllegalArgumentException e) {
throw new UnreadableWalletException("Could not parse input stream to protobuf", e);
}
}
/**
* Loads wallet data from the given protocol buffer and inserts it into the given Wallet object. This is primarily
* useful when you wish to pre-register extension objects. Note that if loading fails the provided Wallet object
* may be in an indeterminate state and should be thrown away.
*
* A wallet can be unreadable for various reasons, such as inability to open the file, corrupt data, internally
* inconsistent data, a wallet extension marked as mandatory that cannot be handled and so on. You should always
* handle {@link UnreadableWalletException} and communicate failure to the user in an appropriate manner.
*
* @throws UnreadableWalletException thrown in various error conditions (see description).
*/
public Wallet readWallet(NetworkParameters params, @Nullable WalletExtension[] extensions,
Protos.Wallet walletProto) throws UnreadableWalletException {
return readWallet(params, extensions, walletProto, false);
}
/**
* Loads wallet data from the given protocol buffer and inserts it into the given Wallet object. This is primarily
* useful when you wish to pre-register extension objects. Note that if loading fails the provided Wallet object
* may be in an indeterminate state and should be thrown away. Do not simply call this method again on the same
* Wallet object with {@code forceReset} set {@code true}. It won't work.
*
* If {@code forceReset} is {@code true}, then no transactions are loaded from the wallet, and it is configured
* to replay transactions from the blockchain (as if the wallet had been loaded and {@link Wallet#reset()}
* had been called immediately thereafter).
*
*
A wallet can be unreadable for various reasons, such as inability to open the file, corrupt data, internally
* inconsistent data, a wallet extension marked as mandatory that cannot be handled and so on. You should always
* handle {@link UnreadableWalletException} and communicate failure to the user in an appropriate manner.
*
* @throws UnreadableWalletException thrown in various error conditions (see description).
*/
public Wallet readWallet(NetworkParameters params, @Nullable WalletExtension[] extensions,
Protos.Wallet walletProto, boolean forceReset) throws UnreadableWalletException {
if (walletProto.getVersion() > CURRENT_WALLET_VERSION)
throw new UnreadableWalletException.FutureVersion();
if (!walletProto.getNetworkIdentifier().equals(params.getId()))
throw new UnreadableWalletException.WrongNetwork();
// Read the scrypt parameters that specify how encryption and decryption is performed.
KeyChainGroup keyChainGroup;
if (walletProto.hasEncryptionParameters()) {
Protos.ScryptParameters encryptionParameters = walletProto.getEncryptionParameters();
final KeyCrypterScrypt keyCrypter = new KeyCrypterScrypt(encryptionParameters);
keyChainGroup = KeyChainGroup.fromProtobufEncrypted(params, walletProto.getKeyList(), keyCrypter, keyChainFactory);
} else {
keyChainGroup = KeyChainGroup.fromProtobufUnencrypted(params, walletProto.getKeyList(), keyChainFactory);
}
Wallet wallet = factory.create(params, keyChainGroup);
List