Examples with ICurl jota.pow.ICurl used on opensource projects

Example 1 with ICurl

use of jota.pow.ICurl in project run-wallet-android by runplay.

the class IotaMsg method getBundle.

/**
 * Gets the associated bundle transactions of a single transaction.
 * Does validation of signatures, total sum as well as bundle order.
 *
 * @param transaction The transaction encoded in trytes.
 * @return an array of bundle, if there are multiple arrays it means that there are conflicting bundles.
 * @throws ArgumentException is thrown when the specified input is not valid.
 */
public GetBundleResponse getBundle(String transaction) throws ArgumentException {
    if (!InputValidator.isHash(transaction)) {
        throw new ArgumentException(INVALID_HASHES_INPUT_ERROR);
    }
    Bundle bundle = traverseBundle(transaction, null, new Bundle());
    if (bundle == null) {
        throw new ArgumentException(INVALID_BUNDLE_ERROR);
    }
    StopWatch stopWatch = new StopWatch();
    long totalSum = 0;
    String bundleHash = bundle.getTransactions().get(0).getBundle();
    ICurl curl = SpongeFactory.create(SpongeFactory.Mode.KERL);
    curl.reset();
    List<Signature> signaturesToValidate = new ArrayList<>();
    for (int i = 0; i < bundle.getTransactions().size(); i++) {
        Transaction trx = bundle.getTransactions().get(i);
        Long bundleValue = trx.getValue();
        totalSum += bundleValue;
        if (i != bundle.getTransactions().get(i).getCurrentIndex()) {
            throw new ArgumentException(INVALID_BUNDLE_ERROR);
        }
        String trxTrytes = trx.toTrytes().substring(2187, 2187 + 162);
        // Absorb bundle hash + value + timestamp + lastIndex + currentIndex trytes.
        curl.absorb(Converter.trits(trxTrytes));
        // Check if input transaction
        if (bundleValue < 0) {
            String address = trx.getAddress();
            Signature sig = new Signature();
            sig.setAddress(address);
            sig.getSignatureFragments().add(trx.getSignatureFragments());
            // Find the subsequent txs with the remaining signature fragment
            for (int y = i + 1; y < bundle.getTransactions().size(); y++) {
                Transaction newBundleTx = bundle.getTransactions().get(y);
                // Check if new tx is part of the signature fragment
                if (newBundleTx.getAddress().equals(address) && newBundleTx.getValue() == 0) {
                    if (sig.getSignatureFragments().indexOf(newBundleTx.getSignatureFragments()) == -1)
                        sig.getSignatureFragments().add(newBundleTx.getSignatureFragments());
                }
            }
            signaturesToValidate.add(sig);
        }
    }
    // Check for total sum, if not equal 0 return error
    if (totalSum != 0)
        throw new ArgumentException(INVALID_BUNDLE_SUM_ERROR);
    int[] bundleFromTrxs = new int[243];
    curl.squeeze(bundleFromTrxs);
    String bundleFromTxString = Converter.trytes(bundleFromTrxs);
    // Check if bundle hash is the same as returned by tx object
    if (!bundleFromTxString.equals(bundleHash))
        throw new ArgumentException(INVALID_BUNDLE_HASH_ERROR);
    // Last tx in the bundle should have currentIndex === lastIndex
    bundle.setLength(bundle.getTransactions().size());
    if (!(bundle.getTransactions().get(bundle.getLength() - 1).getCurrentIndex() == (bundle.getTransactions().get(bundle.getLength() - 1).getLastIndex())))
        throw new ArgumentException(INVALID_BUNDLE_ERROR);
    // Validate the signatures
    for (Signature aSignaturesToValidate : signaturesToValidate) {
        String[] signatureFragments = aSignaturesToValidate.getSignatureFragments().toArray(new String[aSignaturesToValidate.getSignatureFragments().size()]);
        String address = aSignaturesToValidate.getAddress();
        boolean isValidSignature = new Signing(customCurl.clone()).validateSignatures(address, signatureFragments, bundleHash);
        if (!isValidSignature)
            throw new ArgumentException(INVALID_SIGNATURES_ERROR);
    }
    return GetBundleResponse.create(bundle.getTransactions(), stopWatch.getElapsedTimeMili());
}

Example 2 with ICurl

use of jota.pow.ICurl in project run-wallet-android by runplay.

the class RunIotaAPI method getBundle.

/**
 * Gets the associated bundle transactions of a single transaction.
 * Does validation of signatures, total sum as well as bundle order.
 *
 * @param transaction The transaction encoded in trytes.
 * @return an array of bundle, if there are multiple arrays it means that there are conflicting bundles.
 * @throws ArgumentException is thrown when the specified input is not valid.
 */
public GetBundleResponse getBundle(String transaction) throws ArgumentException {
    if (!InputValidator.isHash(transaction)) {
        throw new ArgumentException(INVALID_HASHES_INPUT_ERROR);
    }
    Bundle bundle = traverseBundle(transaction, null, new Bundle());
    if (bundle == null) {
        throw new ArgumentException(INVALID_BUNDLE_ERROR);
    }
    StopWatch stopWatch = new StopWatch();
    long totalSum = 0;
    String bundleHash = bundle.getTransactions().get(0).getBundle();
    ICurl curl = SpongeFactory.create(SpongeFactory.Mode.KERL);
    curl.reset();
    List<Signature> signaturesToValidate = new ArrayList<>();
    for (int i = 0; i < bundle.getTransactions().size(); i++) {
        Transaction trx = bundle.getTransactions().get(i);
        Long bundleValue = trx.getValue();
        totalSum += bundleValue;
        if (i != bundle.getTransactions().get(i).getCurrentIndex()) {
            throw new ArgumentException(INVALID_BUNDLE_ERROR);
        }
        String trxTrytes = trx.toTrytes().substring(2187, 2187 + 162);
        // Absorb bundle hash + value + timestamp + lastIndex + currentIndex trytes.
        curl.absorb(Converter.trits(trxTrytes));
        // Check if input transaction
        if (bundleValue < 0) {
            String address = trx.getAddress();
            Signature sig = new Signature();
            sig.setAddress(address);
            sig.getSignatureFragments().add(trx.getSignatureFragments());
            // Find the subsequent txs with the remaining signature fragment
            for (int y = i + 1; y < bundle.getTransactions().size(); y++) {
                Transaction newBundleTx = bundle.getTransactions().get(y);
                // Check if new tx is part of the signature fragment
                if (newBundleTx.getAddress().equals(address) && newBundleTx.getValue() == 0) {
                    if (sig.getSignatureFragments().indexOf(newBundleTx.getSignatureFragments()) == -1)
                        sig.getSignatureFragments().add(newBundleTx.getSignatureFragments());
                }
            }
            signaturesToValidate.add(sig);
        }
    }
    // Check for total sum, if not equal 0 return error
    if (totalSum != 0)
        throw new ArgumentException(INVALID_BUNDLE_SUM_ERROR);
    int[] bundleFromTrxs = new int[243];
    curl.squeeze(bundleFromTrxs);
    String bundleFromTxString = Converter.trytes(bundleFromTrxs);
    // Check if bundle hash is the same as returned by tx object
    if (!bundleFromTxString.equals(bundleHash))
        throw new ArgumentException(INVALID_BUNDLE_HASH_ERROR);
    // Last tx in the bundle should have currentIndex === lastIndex
    bundle.setLength(bundle.getTransactions().size());
    if (!(bundle.getTransactions().get(bundle.getLength() - 1).getCurrentIndex() == (bundle.getTransactions().get(bundle.getLength() - 1).getLastIndex())))
        throw new ArgumentException(INVALID_BUNDLE_ERROR);
    // Validate the signatures
    for (Signature aSignaturesToValidate : signaturesToValidate) {
        String[] signatureFragments = aSignaturesToValidate.getSignatureFragments().toArray(new String[aSignaturesToValidate.getSignatureFragments().size()]);
        String address = aSignaturesToValidate.getAddress();
        boolean isValidSignature = new Signing(customCurl.clone()).validateSignatures(address, signatureFragments, bundleHash);
        if (!isValidSignature)
            throw new ArgumentException(INVALID_SIGNATURES_ERROR);
    }
    return GetBundleResponse.create(bundle.getTransactions(), stopWatch.getElapsedTimeMili());
}