Java Code Examples for org.fisco.bcos.web3j.crypto.Hash#sha3()

/**
 * get hash value
 * type: sha256 or sm3
 */
public static byte[] getHashValue(byte[] byteArray) {
    byte[] hashResult;
    if(EncryptType.encryptType == 1) {
       hashResult = Hash.sha3(byteArray);
       return hashResult;
    } else {
        MessageDigest sha = null;
        try {
            sha = MessageDigest.getInstance("SHA-256");
            hashResult = sha.digest(byteArray);
            return hashResult;
        } catch (Exception e) {
            log.error("shaEncode getHashValue fail:", e);
            return null;
        }
    }
}
 

public SendTransaction signAndSend(RawTransaction rawTransaction) throws IOException {

        byte[] signedMessage;

        if (chainId > ChainId.NONE) {
            signedMessage = TransactionEncoder.signMessage(rawTransaction, chainId, credentials);
        } else {
            signedMessage = TransactionEncoder.signMessage(rawTransaction, credentials);
        }

        String hexValue = Numeric.toHexString(signedMessage);
        SendTransaction sendTransaction = web3j.sendRawTransaction(hexValue).send();
        if (sendTransaction != null && !sendTransaction.hasError()) {
            String txHashLocal = Hash.sha3(hexValue);
            String txHashRemote = sendTransaction.getTransactionHash();
            if (!txHashVerifier.verify(txHashLocal, txHashRemote)) {
                throw new TxHashMismatchException(txHashLocal, txHashRemote);
            }
        }
        return sendTransaction;
    }
 

private static byte[] nameHash(String[] labels) {
    if (labels.length == 0 || labels[0].equals("")) {
        return EMPTY;
    } else {
        String[] tail;
        if (labels.length == 1) {
            tail = new String[] {};
        } else {
            tail = Arrays.copyOfRange(labels, 1, labels.length);
        }

        byte[] remainderHash = nameHash(tail);
        byte[] result = Arrays.copyOf(remainderHash, 64);

        byte[] labelHash = Hash.sha3(labels[0].getBytes(StandardCharsets.UTF_8));
        System.arraycopy(labelHash, 0, result, 32, labelHash.length);

        return Hash.sha3(result);
    }
}
 

/**
 * get methodId after hash
 */
public static String buildMethodId(AbiDefinition abiDefinition) {
    byte[] inputs = getMethodIdBytes(abiDefinition);
    // 2019/11/27 support guomi
    byte[] hash = Hash.sha3(inputs);
    return Numeric.toHexString(hash).substring(0, 10);
}
 

public static String calculateMerkleRoot(List<MerkleProofUnit> merkleProofUnits, String hash) {
    if (merkleProofUnits == null) {
        return hash;
    }
    String result = hash;
    for (MerkleProofUnit merkleProofUnit : merkleProofUnits) {
        String left = splicing(merkleProofUnit.getLeft());
        String right = splicing(merkleProofUnit.getRight());
        String input = splicing("0x", left, result.substring(2), right);
        result = Hash.sha3(input);
    }
    return result;
}
 

/**
 * Verify transaction receipt merkle proof
 *
 * @param receiptRoot
 * @param receiptAndProof
 * @return
 */
public static boolean verifyTransactionReceipt(
        String receiptRoot, TransactionReceiptWithProof.ReceiptAndProof receiptAndProof) {

    TransactionReceipt transactionReceipt = receiptAndProof.getTransactionReceipt();

    // transaction index
    byte[] byteIndex =
            RlpEncoder.encode(RlpString.create(transactionReceipt.getTransactionIndex()));

    if (!transactionReceipt.getGasUsedRaw().startsWith("0x")) {
        transactionReceipt.setGasUsed("0x" + transactionReceipt.getGasUsed().toString(16));
    }

    String receiptRlp = ReceiptEncoder.encode(transactionReceipt);
    String rlpHash = Hash.sha3(receiptRlp);
    String input = Numeric.toHexString(byteIndex) + rlpHash.substring(2);

    String proof = Merkle.calculateMerkleRoot(receiptAndProof.getReceiptProof(), input);

    logger.debug(
            " transaction hash: {}, receipt index: {}, root: {}, proof: {}, receipt: {}",
            transactionReceipt.getTransactionHash(),
            transactionReceipt.getTransactionIndex(),
            receiptRoot,
            proof,
            receiptAndProof.getTransactionReceipt());

    return proof.equals(receiptRoot);
}
 

/**
 * Verify transaction receipt merkle proof
 *
 * @param receiptRoot
 * @param transactionReceipt
 * @param receiptProof
 * @return
 */
public static boolean verifyTransactionReceipt(
        String receiptRoot,
        TransactionReceipt transactionReceipt,
        List<MerkleProofUnit> receiptProof) {

    if (!transactionReceipt.getGasUsedRaw().startsWith("0x")) {
        transactionReceipt.setGasUsed("0x" + transactionReceipt.getGasUsed().toString(16));
    }

    // transaction index
    byte[] byteIndex =
            RlpEncoder.encode(RlpString.create(transactionReceipt.getTransactionIndex()));

    String receiptRlp = ReceiptEncoder.encode(transactionReceipt);
    String rlpHash = Hash.sha3(receiptRlp);
    String input = Numeric.toHexString(byteIndex) + rlpHash.substring(2);

    String proof = Merkle.calculateMerkleRoot(receiptProof, input);

    logger.debug(
            " transaction hash: {}, transactionReceipt: {}, receiptProof: {}, receiptRoot: {}, proof: {}",
            transactionReceipt.getTransactionHash(),
            transactionReceipt,
            receiptProof,
            receiptRoot,
            proof);

    return proof.equals(receiptRoot);
}
 

@Test
public void testDecodeIndexedStringValue() {
    Utf8String string = new Utf8String("some text");
    String encoded = TypeEncoder.encodeString(string);
    String hash = Hash.sha3(encoded);

    assertThat(
            FunctionReturnDecoder.decodeIndexedValue(hash, new TypeReference<Utf8String>() {}),
            equalTo(new Bytes32(Numeric.hexStringToByteArray(hash))));
}
 

@Test
public void testDecodeIndexedDynamicBytesValue() {
    DynamicBytes bytes = new DynamicBytes(new byte[] {1, 2, 3, 4, 5});
    String encoded = TypeEncoder.encodeDynamicBytes(bytes);
    String hash = Hash.sha3(encoded);

    assertThat(
            FunctionReturnDecoder.decodeIndexedValue(
                    hash, new TypeReference<DynamicBytes>() {}),
            equalTo(new Bytes32(Numeric.hexStringToByteArray(hash))));
}
 

@Test
public void testDecodeIndexedDynamicArrayValue() {
    DynamicArray<Uint256> array = new DynamicArray<>(new Uint256(BigInteger.TEN));
    String encoded = TypeEncoder.encodeDynamicArray(array);
    String hash = Hash.sha3(encoded);

    assertThat(
            FunctionReturnDecoder.decodeIndexedValue(
                    hash, new TypeReference<DynamicArray>() {}),
            equalTo(new Bytes32(Numeric.hexStringToByteArray(hash))));
}
 

public TransactionReceiptWithProof getTransactionReceiptWithProof(
        String transactionHash, String rootHash) throws IOException {
    TransactionReceiptWithProof transactionReceiptWithProof =
            web3j.getTransactionReceiptByHashWithProof(transactionHash).send();

    if (transactionReceiptWithProof.getTransactionReceiptWithProof() == null) {
        return null;
    }
    TransactionReceipt transactionReceipt =
            transactionReceiptWithProof
                    .getTransactionReceiptWithProof()
                    .getTransactionReceipt();
    logger.debug("Receipt {}", transactionReceipt.toString());

    // transaction index
    String index = transactionReceipt.getTransactionIndexRaw();
    BigInteger indexValue = Numeric.toBigInt(index);
    byte[] byteIndex = RlpEncoder.encode(RlpString.create(indexValue));

    String receiptRlp = ReceiptEncoder.encode(transactionReceipt);
    logger.debug("ReceiptRlp:{}", receiptRlp);

    String rlpHash = Hash.sha3(receiptRlp);
    logger.debug("ReceiptRlpHash:{}", rlpHash);

    String input = Numeric.toHexString(byteIndex) + rlpHash.substring(2);
    logger.info("ReceiptWithIndex:{}", input);

    String proof =
            Merkle.calculateMerkleRoot(
                    transactionReceiptWithProof
                            .getTransactionReceiptWithProof()
                            .getReceiptProof(),
                    input);

    //        System.out.println("MerkleRoot: " + proof);
    if (!proof.equals(rootHash)) {
        logger.debug("MerkleRoot:{}", proof);
        logger.debug("TransRoot :{}", rootHash);
        return null;
    }
    return transactionReceiptWithProof;
}
 

public static String stringToTopic(String s) {
    byte[] hash = Hash.sha3(s.getBytes());
    return Numeric.toHexString(hash);
}
 

public static String bytesToTopic(byte[] b) {
    byte[] hash = Hash.sha3(b);
    return Numeric.toHexString(hash);
}
 

public static String buildEventSignature(String methodSignature) {
    byte[] input = methodSignature.getBytes();
    byte[] hash = Hash.sha3(input);
    return Numeric.toHexString(hash);
}
 

public static String buildMethodId(String methodSignature) {
    byte[] input = methodSignature.getBytes();
    byte[] hash = Hash.sha3(input);
    return Numeric.toHexString(hash).substring(0, 10);
}