private void loadExtensions(
     Wallet wallet, WalletExtension[] extensionsList, Protos.Wallet walletProto)
     throws UnreadableWalletException {
   final Map<String, WalletExtension> extensions = new HashMap<String, WalletExtension>();
   for (WalletExtension e : extensionsList) extensions.put(e.getWalletExtensionID(), e);
   // The Wallet object, if subclassed, might have added some extensions to itself already. In that
   // case, don't
   // expect them to be passed in, just fetch them here and don't re-add.
   extensions.putAll(wallet.getExtensions());
   for (Protos.Extension extProto : walletProto.getExtensionList()) {
     String id = extProto.getId();
     WalletExtension extension = extensions.get(id);
     if (extension == null) {
       if (extProto.getMandatory()) {
         if (requireMandatoryExtensions)
           throw new UnreadableWalletException("Unknown mandatory extension in wallet: " + id);
         else log.error("Unknown extension in wallet {}, ignoring", id);
       }
     } else {
       log.info("Loading wallet extension {}", id);
       try {
         extension.deserializeWalletExtension(wallet, extProto.getData().toByteArray());
         wallet.addOrGetExistingExtension(extension);
       } catch (Exception e) {
         if (extProto.getMandatory() && requireMandatoryExtensions)
           throw new UnreadableWalletException(
               "Could not parse mandatory extension in wallet: " + id);
         else log.error("Error whilst reading extension {}, ignoring", id, e);
       }
     }
   }
 }
  private WalletTransaction connectTransactionOutputs(
      com.fuelcoinj.wallet.Protos.Transaction txProto) throws UnreadableWalletException {
    Transaction tx = txMap.get(txProto.getHash());
    final WalletTransaction.Pool pool;
    switch (txProto.getPool()) {
      case DEAD:
        pool = WalletTransaction.Pool.DEAD;
        break;
      case PENDING:
        pool = WalletTransaction.Pool.PENDING;
        break;
      case SPENT:
        pool = WalletTransaction.Pool.SPENT;
        break;
      case UNSPENT:
        pool = WalletTransaction.Pool.UNSPENT;
        break;
        // Upgrade old wallets: inactive pool has been merged with the pending pool.
        // Remove this some time after 0.9 is old and everyone has upgraded.
        // There should not be any spent outputs in this tx as old wallets would not allow them to
        // be spent
        // in this state.
      case INACTIVE:
      case PENDING_INACTIVE:
        pool = WalletTransaction.Pool.PENDING;
        break;
      default:
        throw new UnreadableWalletException("Unknown transaction pool: " + txProto.getPool());
    }
    for (int i = 0; i < tx.getOutputs().size(); i++) {
      TransactionOutput output = tx.getOutputs().get(i);
      final Protos.TransactionOutput transactionOutput = txProto.getTransactionOutput(i);
      if (transactionOutput.hasSpentByTransactionHash()) {
        final ByteString spentByTransactionHash = transactionOutput.getSpentByTransactionHash();
        Transaction spendingTx = txMap.get(spentByTransactionHash);
        if (spendingTx == null) {
          throw new UnreadableWalletException(
              String.format(
                  "Could not connect %s to %s",
                  tx.getHashAsString(), byteStringToHash(spentByTransactionHash)));
        }
        final int spendingIndex = transactionOutput.getSpentByTransactionIndex();
        TransactionInput input = checkNotNull(spendingTx.getInput(spendingIndex));
        input.connect(output);
      }
    }

    if (txProto.hasConfidence()) {
      Protos.TransactionConfidence confidenceProto = txProto.getConfidence();
      TransactionConfidence confidence = tx.getConfidence();
      readConfidence(tx, confidenceProto, confidence);
    }

    return new WalletTransaction(pool, tx);
  }
 private void readConfidence(
     Transaction tx,
     Protos.TransactionConfidence confidenceProto,
     TransactionConfidence confidence)
     throws UnreadableWalletException {
   // We are lenient here because tx confidence is not an essential part of the wallet.
   // If the tx has an unknown type of confidence, ignore.
   if (!confidenceProto.hasType()) {
     log.warn("Unknown confidence type for tx {}", tx.getHashAsString());
     return;
   }
   ConfidenceType confidenceType;
   switch (confidenceProto.getType()) {
     case BUILDING:
       confidenceType = ConfidenceType.BUILDING;
       break;
     case DEAD:
       confidenceType = ConfidenceType.DEAD;
       break;
       // These two are equivalent (must be able to read old wallets).
     case NOT_IN_BEST_CHAIN:
       confidenceType = ConfidenceType.PENDING;
       break;
     case PENDING:
       confidenceType = ConfidenceType.PENDING;
       break;
     case UNKNOWN:
       // Fall through.
     default:
       confidenceType = ConfidenceType.UNKNOWN;
       break;
   }
   confidence.setConfidenceType(confidenceType);
   if (confidenceProto.hasAppearedAtHeight()) {
     if (confidence.getConfidenceType() != ConfidenceType.BUILDING) {
       log.warn("Have appearedAtHeight but not BUILDING for tx {}", tx.getHashAsString());
       return;
     }
     confidence.setAppearedAtChainHeight(confidenceProto.getAppearedAtHeight());
   }
   if (confidenceProto.hasDepth()) {
     if (confidence.getConfidenceType() != ConfidenceType.BUILDING) {
       log.warn("Have depth but not BUILDING for tx {}", tx.getHashAsString());
       return;
     }
     confidence.setDepthInBlocks(confidenceProto.getDepth());
   }
   if (confidenceProto.hasOverridingTransaction()) {
     if (confidence.getConfidenceType() != ConfidenceType.DEAD) {
       log.warn("Have overridingTransaction but not OVERRIDDEN for tx {}", tx.getHashAsString());
       return;
     }
     Transaction overridingTransaction = txMap.get(confidenceProto.getOverridingTransaction());
     if (overridingTransaction == null) {
       log.warn(
           "Have overridingTransaction that is not in wallet for tx {}", tx.getHashAsString());
       return;
     }
     confidence.setOverridingTransaction(overridingTransaction);
   }
   for (Protos.PeerAddress proto : confidenceProto.getBroadcastByList()) {
     InetAddress ip;
     try {
       ip = InetAddress.getByAddress(proto.getIpAddress().toByteArray());
     } catch (UnknownHostException e) {
       throw new UnreadableWalletException("Peer IP address does not have the right length", e);
     }
     int port = proto.getPort();
     PeerAddress address = new PeerAddress(ip, port);
     address.setServices(BigInteger.valueOf(proto.getServices()));
     confidence.markBroadcastBy(address);
   }
   switch (confidenceProto.getSource()) {
     case SOURCE_SELF:
       confidence.setSource(TransactionConfidence.Source.SELF);
       break;
     case SOURCE_NETWORK:
       confidence.setSource(TransactionConfidence.Source.NETWORK);
       break;
     case SOURCE_UNKNOWN:
       // Fall through.
     default:
       confidence.setSource(TransactionConfidence.Source.UNKNOWN);
       break;
   }
 }
  private void readTransaction(Protos.Transaction txProto, NetworkParameters params)
      throws UnreadableWalletException {
    Transaction tx = new Transaction(params);
    if (txProto.hasUpdatedAt()) {
      tx.setUpdateTime(new Date(txProto.getUpdatedAt()));
    }

    for (Protos.TransactionOutput outputProto : txProto.getTransactionOutputList()) {
      Coin value = Coin.valueOf(outputProto.getValue());
      byte[] scriptBytes = outputProto.getScriptBytes().toByteArray();
      TransactionOutput output = new TransactionOutput(params, tx, value, scriptBytes);
      tx.addOutput(output);
    }

    for (Protos.TransactionInput inputProto : txProto.getTransactionInputList()) {
      byte[] scriptBytes = inputProto.getScriptBytes().toByteArray();
      TransactionOutPoint outpoint =
          new TransactionOutPoint(
              params,
              inputProto.getTransactionOutPointIndex() & 0xFFFFFFFFL,
              byteStringToHash(inputProto.getTransactionOutPointHash()));
      Coin value = inputProto.hasValue() ? Coin.valueOf(inputProto.getValue()) : null;
      TransactionInput input = new TransactionInput(params, tx, scriptBytes, outpoint, value);
      if (inputProto.hasSequence()) {
        input.setSequenceNumber(inputProto.getSequence());
      }
      tx.addInput(input);
    }

    for (int i = 0; i < txProto.getBlockHashCount(); i++) {
      ByteString blockHash = txProto.getBlockHash(i);
      int relativityOffset = 0;
      if (txProto.getBlockRelativityOffsetsCount() > 0)
        relativityOffset = txProto.getBlockRelativityOffsets(i);
      tx.addBlockAppearance(byteStringToHash(blockHash), relativityOffset);
    }

    if (txProto.hasLockTime()) {
      tx.setLockTime(0xffffffffL & txProto.getLockTime());
    }

    if (txProto.hasPurpose()) {
      switch (txProto.getPurpose()) {
        case UNKNOWN:
          tx.setPurpose(Transaction.Purpose.UNKNOWN);
          break;
        case USER_PAYMENT:
          tx.setPurpose(Transaction.Purpose.USER_PAYMENT);
          break;
        case KEY_ROTATION:
          tx.setPurpose(Transaction.Purpose.KEY_ROTATION);
          break;
        case ASSURANCE_CONTRACT_CLAIM:
          tx.setPurpose(Transaction.Purpose.ASSURANCE_CONTRACT_CLAIM);
          break;
        case ASSURANCE_CONTRACT_PLEDGE:
          tx.setPurpose(Transaction.Purpose.ASSURANCE_CONTRACT_PLEDGE);
          break;
        case ASSURANCE_CONTRACT_STUB:
          tx.setPurpose(Transaction.Purpose.ASSURANCE_CONTRACT_STUB);
          break;
        default:
          throw new RuntimeException("New purpose serialization not implemented");
      }
    } else {
      // Old wallet: assume a user payment as that's the only reason a new tx would have been
      // created back then.
      tx.setPurpose(Transaction.Purpose.USER_PAYMENT);
    }

    if (txProto.hasExchangeRate()) {
      Protos.ExchangeRate exchangeRateProto = txProto.getExchangeRate();
      tx.setExchangeRate(
          new ExchangeRate(
              Coin.valueOf(exchangeRateProto.getCoinValue()),
              Fiat.valueOf(
                  exchangeRateProto.getFiatCurrencyCode(), exchangeRateProto.getFiatValue())));
    }

    if (txProto.hasMemo()) tx.setMemo(txProto.getMemo());

    // Peercoin: Include time
    tx.setTime(txProto.getTime());

    // Transaction should now be complete.
    Sha256Hash protoHash = byteStringToHash(txProto.getHash());
    if (!tx.getHash().equals(protoHash))
      throw new UnreadableWalletException(
          String.format(
              "Transaction did not deserialize completely: %s vs %s", tx.getHash(), protoHash));
    if (txMap.containsKey(txProto.getHash()))
      throw new UnreadableWalletException(
          "Wallet contained duplicate transaction " + byteStringToHash(txProto.getHash()));
    txMap.put(txProto.getHash(), tx);
  }
  /**
   * 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.
   *
   * <p>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 {
    if (walletProto.getVersion() > 1) throw new UnreadableWalletException.FutureVersion();
    if (!walletProto.getNetworkIdentifier().equals(params.getId()))
      throw new UnreadableWalletException.WrongNetwork();

    int sigsRequiredToSpend = walletProto.getSigsRequiredToSpend();

    // Read the scrypt parameters that specify how encryption and decryption is performed.
    KeyChainGroup chain;
    if (walletProto.hasEncryptionParameters()) {
      Protos.ScryptParameters encryptionParameters = walletProto.getEncryptionParameters();
      final KeyCrypterScrypt keyCrypter = new KeyCrypterScrypt(encryptionParameters);
      chain =
          KeyChainGroup.fromProtobufEncrypted(
              params, walletProto.getKeyList(), sigsRequiredToSpend, keyCrypter);
    } else {
      chain =
          KeyChainGroup.fromProtobufUnencrypted(
              params, walletProto.getKeyList(), sigsRequiredToSpend);
    }
    Wallet wallet = factory.create(params, chain);

    List<Script> scripts = Lists.newArrayList();
    for (Protos.Script protoScript : walletProto.getWatchedScriptList()) {
      try {
        Script script =
            new Script(
                protoScript.getProgram().toByteArray(), protoScript.getCreationTimestamp() / 1000);
        scripts.add(script);
      } catch (ScriptException e) {
        throw new UnreadableWalletException("Unparseable script in wallet");
      }
    }

    wallet.addWatchedScripts(scripts);

    if (walletProto.hasDescription()) {
      wallet.setDescription(walletProto.getDescription());
    }

    // Read all transactions and insert into the txMap.
    for (Protos.Transaction txProto : walletProto.getTransactionList()) {
      readTransaction(txProto, wallet.getParams());
    }

    // Update transaction outputs to point to inputs that spend them
    for (Protos.Transaction txProto : walletProto.getTransactionList()) {
      WalletTransaction wtx = connectTransactionOutputs(txProto);
      wallet.addWalletTransaction(wtx);
    }

    // Update the lastBlockSeenHash.
    if (!walletProto.hasLastSeenBlockHash()) {
      wallet.setLastBlockSeenHash(null);
    } else {
      wallet.setLastBlockSeenHash(byteStringToHash(walletProto.getLastSeenBlockHash()));
    }
    if (!walletProto.hasLastSeenBlockHeight()) {
      wallet.setLastBlockSeenHeight(-1);
    } else {
      wallet.setLastBlockSeenHeight(walletProto.getLastSeenBlockHeight());
    }
    // Will default to zero if not present.
    wallet.setLastBlockSeenTimeSecs(walletProto.getLastSeenBlockTimeSecs());

    if (walletProto.hasKeyRotationTime()) {
      wallet.setKeyRotationTime(new Date(walletProto.getKeyRotationTime() * 1000));
    }

    loadExtensions(wallet, extensions != null ? extensions : new WalletExtension[0], walletProto);

    for (Protos.Tag tag : walletProto.getTagsList()) {
      wallet.setTag(tag.getTag(), tag.getData());
    }

    for (Protos.TransactionSigner signerProto : walletProto.getTransactionSignersList()) {
      try {
        Class signerClass = Class.forName(signerProto.getClassName());
        TransactionSigner signer = (TransactionSigner) signerClass.newInstance();
        signer.deserialize(signerProto.getData().toByteArray());
        wallet.addTransactionSigner(signer);
      } catch (Exception e) {
        throw new UnreadableWalletException(
            "Unable to deserialize TransactionSigner instance: " + signerProto.getClassName(), e);
      }
    }

    if (walletProto.hasVersion()) {
      wallet.setVersion(walletProto.getVersion());
    }

    // Make sure the object can be re-used to read another wallet without corruption.
    txMap.clear();

    return wallet;
  }
  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.getHash()))
        .setVersion((int) tx.getVersion())
        .setTime(tx.getTime());

    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().getHash();
        int spentByTransactionIndex = spentBy.getParentTransaction().getInputs().indexOf(spentBy);
        outputBuilder
            .setSpentByTransactionHash(hashToByteString(spendingHash))
            .setSpentByTransactionIndex(spentByTransactionIndex);
      }
      txBuilder.addTransactionOutput(outputBuilder);
    }

    // Handle which blocks tx was seen in.
    final Map<Sha256Hash, Integer> appearsInHashes = tx.getAppearsInHashes();
    if (appearsInHashes != null) {
      for (Map.Entry<Sha256Hash, Integer> 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;
      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());

    return txBuilder.build();
  }