org.web3j.utils.Numeric.toBytesPadded()方法的使用及代码示例

x33g5p2x  于2022-01-24 转载在 其他  
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本文整理了Java中org.web3j.utils.Numeric.toBytesPadded()方法的一些代码示例，展示了Numeric.toBytesPadded()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Numeric.toBytesPadded()方法的具体详情如下：
包路径：org.web3j.utils.Numeric
类名称：Numeric
方法名：toBytesPadded

Numeric.toBytesPadded介绍

暂无

代码示例

代码示例来源：origin: web3j/web3j

  1. public static byte[] serialize(ECKeyPair ecKeyPair) {
  2.   byte[] privateKey = Numeric.toBytesPadded(ecKeyPair.getPrivateKey(), PRIVATE_KEY_SIZE);
  3.   byte[] publicKey = Numeric.toBytesPadded(ecKeyPair.getPublicKey(), PUBLIC_KEY_SIZE);
  4.   byte[] result = Arrays.copyOf(privateKey, PRIVATE_KEY_SIZE + PUBLIC_KEY_SIZE);
  5.   System.arraycopy(publicKey, 0, result, PRIVATE_KEY_SIZE, PUBLIC_KEY_SIZE);
  6.   return result;
  7. }

代码示例来源：origin: web3j/web3j

  1. @Test
  2. public void testToBytesPadded() {
  3.   assertThat(Numeric.toBytesPadded(BigInteger.TEN, 1),
  4.       is(new byte[] { 0xa }));
  5.   assertThat(Numeric.toBytesPadded(BigInteger.TEN, 8),
  6.       is(new byte[] { 0, 0, 0, 0, 0, 0, 0, 0xa }));
  7.   assertThat(Numeric.toBytesPadded(BigInteger.valueOf(Integer.MAX_VALUE), 4),
  8.       is(new byte[] { 0x7f, (byte) 0xff, (byte) 0xff, (byte) 0xff }));
  9. }

代码示例来源：origin: web3j/web3j

  1. @Test(expected = RuntimeException.class)
  2. public void testToBytesPaddedInvalid() {
  3.   Numeric.toBytesPadded(BigInteger.valueOf(Long.MAX_VALUE), 7);
  4. }

代码示例来源：origin: web3j/web3j

  1. public static SignatureData signMessage(byte[] message, ECKeyPair keyPair, boolean needToHash) {
  2.   BigInteger publicKey = keyPair.getPublicKey();
  3.   byte[] messageHash;
  4.   if (needToHash) {
  5.     messageHash = Hash.sha3(message);
  6.   } else {
  7.     messageHash = message;
  8.   }
  9.   ECDSASignature sig = keyPair.sign(messageHash);
  10.   // Now we have to work backwards to figure out the recId needed to recover the signature.
  11.   int recId = -1;
  12.   for (int i = 0; i < 4; i++) {
  13.     BigInteger k = recoverFromSignature(i, sig, messageHash);
  14.     if (k != null && k.equals(publicKey)) {
  15.       recId = i;
  16.       break;
  17.     }
  18.   }
  19.   if (recId == -1) {
  20.     throw new RuntimeException(
  21.         "Could not construct a recoverable key. Are your credentials valid?");
  22.   }
  23.   int headerByte = recId + 27;
  24.   // 1 header + 32 bytes for R + 32 bytes for S
  25.   byte v = (byte) headerByte;
  26.   byte[] r = Numeric.toBytesPadded(sig.r, 32);
  27.   byte[] s = Numeric.toBytesPadded(sig.s, 32);
  28.   return new SignatureData(v, r, s);
  29. }

代码示例来源：origin: web3j/web3j

  1. Numeric.toBytesPadded(
  2.     new BigInteger(Long.toString(offset)), MAX_BYTE_LENGTH

代码示例来源：origin: web3j/web3j

  1. public static WalletFile create(String password, ECKeyPair ecKeyPair, int n, int p)
  2.     throws CipherException {
  3.   byte[] salt = generateRandomBytes(32);
  4.   byte[] derivedKey = generateDerivedScryptKey(
  5.       password.getBytes(UTF_8), salt, n, R, p, DKLEN);
  6.   byte[] encryptKey = Arrays.copyOfRange(derivedKey, 0, 16);
  7.   byte[] iv = generateRandomBytes(16);
  8.   byte[] privateKeyBytes =
  9.       Numeric.toBytesPadded(ecKeyPair.getPrivateKey(), Keys.PRIVATE_KEY_SIZE);
  10.   byte[] cipherText = performCipherOperation(
  11.         Cipher.ENCRYPT_MODE, iv, encryptKey, privateKeyBytes);
  12.   byte[] mac = generateMac(derivedKey, cipherText);
  13.   return createWalletFile(ecKeyPair, cipherText, iv, salt, mac, n, p);
  14. }

代码示例来源：origin: web3j/web3j

  1. public static RawTransaction decode(String hexTransaction) {
  2.   byte[] transaction = Numeric.hexStringToByteArray(hexTransaction);
  3.   RlpList rlpList = RlpDecoder.decode(transaction);
  4.   RlpList values = (RlpList) rlpList.getValues().get(0);
  5.   BigInteger nonce = ((RlpString) values.getValues().get(0)).asPositiveBigInteger();
  6.   BigInteger gasPrice = ((RlpString) values.getValues().get(1)).asPositiveBigInteger();
  7.   BigInteger gasLimit = ((RlpString) values.getValues().get(2)).asPositiveBigInteger();
  8.   String to = ((RlpString) values.getValues().get(3)).asString();
  9.   BigInteger value = ((RlpString) values.getValues().get(4)).asPositiveBigInteger();
  10.   String data = ((RlpString) values.getValues().get(5)).asString();
  11.   if (values.getValues().size() > 6) {
  12.     byte v = ((RlpString) values.getValues().get(6)).getBytes()[0];
  13.     byte[] r = Numeric.toBytesPadded(
  14.       Numeric.toBigInt(((RlpString) values.getValues().get(7)).getBytes()), 32);
  15.     byte[] s = Numeric.toBytesPadded(
  16.       Numeric.toBigInt(((RlpString) values.getValues().get(8)).getBytes()), 32);
  17.     Sign.SignatureData signatureData = new Sign.SignatureData(v, r, s);
  18.     return new SignedRawTransaction(nonce, gasPrice, gasLimit,
  19.       to, value, data, signatureData);
  20.   } else {
  21.     return RawTransaction.createTransaction(nonce,
  22.       gasPrice, gasLimit, to, value, data);
  23.   }
  24. }

代码示例来源：origin: web3j/web3j

  1. @Test
  2. public void testGetAddressZeroPadded() {
  3.   byte[] address = Keys.getAddress(
  4.       Numeric.toBytesPadded(BigInteger.valueOf(0x1234), Keys.PUBLIC_KEY_SIZE));
  5.   String expected = Numeric.toHexStringNoPrefix(address);
  6.   String value = "1234";
  7.   assertThat(Keys.getAddress("0x"
  8.           + Strings.zeros(Keys.PUBLIC_KEY_LENGTH_IN_HEX - value.length()) + value),
  9.       equalTo(expected));
  10. }

代码示例来源：origin: web3j/web3j

  1. @Test
  2. public void testGetAddressSmallPublicKey() {
  3.   byte[] address = Keys.getAddress(
  4.       Numeric.toBytesPadded(BigInteger.valueOf(0x1234), Keys.PUBLIC_KEY_SIZE));
  5.   String expected = Numeric.toHexStringNoPrefix(address);
  6.   assertThat(Keys.getAddress("0x1234"), equalTo(expected));
  7. }

代码示例来源：origin: org.web3j/crypto

  1. public static byte[] serialize(ECKeyPair ecKeyPair) {
  2.   byte[] privateKey = Numeric.toBytesPadded(ecKeyPair.getPrivateKey(), PRIVATE_KEY_SIZE);
  3.   byte[] publicKey = Numeric.toBytesPadded(ecKeyPair.getPublicKey(), PUBLIC_KEY_SIZE);
  4.   byte[] result = Arrays.copyOf(privateKey, PRIVATE_KEY_SIZE + PUBLIC_KEY_SIZE);
  5.   System.arraycopy(publicKey, 0, result, PRIVATE_KEY_SIZE, PUBLIC_KEY_SIZE);
  6.   return result;
  7. }

代码示例来源：origin: io.daonomic.scalether/util

  1. public static SignatureData signMessage(byte[] message, BigInteger publicKey, BigInteger privateKey) {
  2.   byte[] messageHash = Hash.sha3(message);
  3.   ECDSASignature sig = sign(messageHash, privateKey);
  4.   // Now we have to work backwards to figure out the recId needed to recover the signature.
  5.   int recId = -1;
  6.   for (int i = 0; i < 4; i++) {
  7.     BigInteger k = recoverFromSignature(i, sig, messageHash);
  8.     if (k != null && k.equals(publicKey)) {
  9.       recId = i;
  10.       break;
  11.     }
  12.   }
  13.   if (recId == -1) {
  14.     throw new RuntimeException(
  15.         "Could not construct a recoverable key. This should never happen.");
  16.   }
  17.   int headerByte = recId + 27;
  18.   // 1 header + 32 bytes for R + 32 bytes for S
  19.   byte v = (byte) headerByte;
  20.   byte[] r = Numeric.toBytesPadded(sig.r, 32);
  21.   byte[] s = Numeric.toBytesPadded(sig.s, 32);
  22.   return new SignatureData(v, r, s);
  23. }

代码示例来源：origin: org.web3j/crypto

  1. public static SignatureData signMessage(byte[] message, ECKeyPair keyPair, boolean needToHash) {
  2.   BigInteger publicKey = keyPair.getPublicKey();
  3.   byte[] messageHash;
  4.   if (needToHash) {
  5.     messageHash = Hash.sha3(message);
  6.   } else {
  7.     messageHash = message;
  8.   }
  9.   ECDSASignature sig = keyPair.sign(messageHash);
  10.   // Now we have to work backwards to figure out the recId needed to recover the signature.
  11.   int recId = -1;
  12.   for (int i = 0; i < 4; i++) {
  13.     BigInteger k = recoverFromSignature(i, sig, messageHash);
  14.     if (k != null && k.equals(publicKey)) {
  15.       recId = i;
  16.       break;
  17.     }
  18.   }
  19.   if (recId == -1) {
  20.     throw new RuntimeException(
  21.         "Could not construct a recoverable key. Are your credentials valid?");
  22.   }
  23.   int headerByte = recId + 27;
  24.   // 1 header + 32 bytes for R + 32 bytes for S
  25.   byte v = (byte) headerByte;
  26.   byte[] r = Numeric.toBytesPadded(sig.r, 32);
  27.   byte[] s = Numeric.toBytesPadded(sig.s, 32);
  28.   return new SignatureData(v, r, s);
  29. }

代码示例来源：origin: org.web3j/abi

  1. Numeric.toBytesPadded(
  2.     new BigInteger(Long.toString(offset)), MAX_BYTE_LENGTH

代码示例来源：origin: ethjava/web3j-sample

  1. private static void decodeMessage(String signedData) {
  2.   //样例 https://ropsten.etherscan.io/tx/0xfd8acd10d72127f29f0a01d8bcaf0165665b5598781fe01ca4bceaa6ab9f2cb0
  3.   try {
  4.     System.out.println(signedData);
  5.     System.out.println("解密 start " + System.currentTimeMillis());
  6.     RlpList rlpList = RlpDecoder.decode(Numeric.hexStringToByteArray(signedData));
  7.     List<RlpType> values = ((RlpList) rlpList.getValues().get(0)).getValues();
  8.     BigInteger nonce = Numeric.toBigInt(((RlpString) values.get(0)).getBytes());
  9.     BigInteger gasPrice = Numeric.toBigInt(((RlpString) values.get(1)).getBytes());
  10.     BigInteger gasLimit = Numeric.toBigInt(((RlpString) values.get(2)).getBytes());
  11.     String to = Numeric.toHexString(((RlpString) values.get(3)).getBytes());
  12.     BigInteger value = Numeric.toBigInt(((RlpString) values.get(4)).getBytes());
  13.     String data = Numeric.toHexString(((RlpString) values.get(5)).getBytes());
  14.     RawTransaction rawTransaction = RawTransaction.createTransaction(nonce, gasPrice, gasLimit, to, value, data);
  15.     RlpString v = (RlpString) values.get(6);
  16.     RlpString r = (RlpString) values.get(7);
  17.     RlpString s = (RlpString) values.get(8);
  18.     Sign.SignatureData signatureData = new Sign.SignatureData(
  19.         v.getBytes()[0],
  20.         Numeric.toBytesPadded(Numeric.toBigInt(r.getBytes()), 32),
  21.         Numeric.toBytesPadded(Numeric.toBigInt(s.getBytes()), 32));
  22.     BigInteger pubKey = Sign.signedMessageToKey(TransactionEncoder.encode(rawTransaction), signatureData);
  23.     System.out.println("publicKey " + pubKey.toString(16));
  24.     String address = Numeric.prependHexPrefix(Keys.getAddress(pubKey));
  25.     System.out.println("address " + address);
  26.     System.out.println("解密 end " + System.currentTimeMillis());
  27.   } catch (Exception e) {
  28.     e.printStackTrace();
  29.   }
  30. }

代码示例来源：origin: org.web3j/crypto

  1. public static RawTransaction decode(String hexTransaction) {
  2.   byte[] transaction = Numeric.hexStringToByteArray(hexTransaction);
  3.   RlpList rlpList = RlpDecoder.decode(transaction);
  4.   RlpList values = (RlpList) rlpList.getValues().get(0);
  5.   BigInteger nonce = ((RlpString) values.getValues().get(0)).asPositiveBigInteger();
  6.   BigInteger gasPrice = ((RlpString) values.getValues().get(1)).asPositiveBigInteger();
  7.   BigInteger gasLimit = ((RlpString) values.getValues().get(2)).asPositiveBigInteger();
  8.   String to = ((RlpString) values.getValues().get(3)).asString();
  9.   BigInteger value = ((RlpString) values.getValues().get(4)).asPositiveBigInteger();
  10.   String data = ((RlpString) values.getValues().get(5)).asString();
  11.   if (values.getValues().size() > 6) {
  12.     byte v = ((RlpString) values.getValues().get(6)).getBytes()[0];
  13.     byte[] r = Numeric.toBytesPadded(
  14.       Numeric.toBigInt(((RlpString) values.getValues().get(7)).getBytes()), 32);
  15.     byte[] s = Numeric.toBytesPadded(
  16.       Numeric.toBigInt(((RlpString) values.getValues().get(8)).getBytes()), 32);
  17.     Sign.SignatureData signatureData = new Sign.SignatureData(v, r, s);
  18.     return new SignedRawTransaction(nonce, gasPrice, gasLimit,
  19.       to, value, data, signatureData);
  20.   } else {
  21.     return RawTransaction.createTransaction(nonce,
  22.       gasPrice, gasLimit, to, value, data);
  23.   }
  24. }

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