org.web3j.utils.Numeric类的使用及代码示例

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类的一些代码示例，展示了Numeric类的具体用法。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类的具体详情如下：
包路径：org.web3j.utils.Numeric
类名称：Numeric

Numeric介绍

[英]Message codec functions.

Implementation as per https://github.com/ethereum/wiki/wiki/JSON-RPC#hex-value-encoding
[中]消息编解码器功能。
按照https://github.com/ethereum/wiki/wiki/JSON-RPC#hex-值编码

代码示例

代码示例来源：origin: web3j/web3j

  1. public static String toHexStringNoPrefix(byte[] input) {
  2.   return toHexString(input, 0, input.length, false);
  3. }

代码示例来源：origin: web3j/web3j

  1. /**
  2.  * Keccak-256 hash function.
  3.  *
  4.  * @param hexInput hex encoded input data with optional 0x prefix
  5.  * @return hash value as hex encoded string
  6.  */
  7. public static String sha3(String hexInput) {
  8.   byte[] bytes = Numeric.hexStringToByteArray(hexInput);
  9.   byte[] result = sha3(bytes);
  10.   return Numeric.toHexString(result);
  11. }

代码示例来源：origin: web3j/web3j

  1. public static ECKeyPair deserialize(byte[] input) {
  2.     if (input.length != PRIVATE_KEY_SIZE + PUBLIC_KEY_SIZE) {
  3.       throw new RuntimeException("Invalid input key size");
  4.     }
  6.     BigInteger privateKey = Numeric.toBigInt(input, 0, PRIVATE_KEY_SIZE);
  7.     BigInteger publicKey = Numeric.toBigInt(input, PRIVATE_KEY_SIZE, PUBLIC_KEY_SIZE);
  9.     return new ECKeyPair(privateKey, publicKey);
  10.   }
  11. }

代码示例来源：origin: web3j/web3j

  1. public static BigInteger toBigInt(String hexValue) {
  2.   String cleanValue = cleanHexPrefix(hexValue);
  3.   return toBigIntNoPrefix(cleanValue);
  4. }

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: 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. public static byte[] nameHashAsBytes(String ensName) {
  2.   return Numeric.hexStringToByteArray(nameHash(ensName));
  3. }

代码示例来源：origin: web3j/web3j

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

代码示例来源：origin: web3j/web3j

  1. static String encodeBool(Bool value) {
  2.   byte[] rawValue = new byte[MAX_BYTE_LENGTH];
  3.   if (value.getValue()) {
  4.     rawValue[rawValue.length - 1] = 1;
  5.   }
  6.   return Numeric.toHexStringNoPrefix(rawValue);
  7. }

代码示例来源：origin: web3j/web3j

  1. protected RawTransaction(BigInteger nonce, BigInteger gasPrice, BigInteger gasLimit, String to,
  2.             BigInteger value, String data) {
  3.   this.nonce = nonce;
  4.   this.gasPrice = gasPrice;
  5.   this.gasLimit = gasLimit;
  6.   this.to = to;
  7.   this.value = value;
  8.   if (data != null) {
  9.     this.data = Numeric.cleanHexPrefix(data);
  10.   }
  11. }

代码示例来源：origin: web3j/web3j

  1. private BigInteger convert(String value) {
  2.   if (value != null) {
  3.     return Numeric.decodeQuantity(value);
  4.   } else {
  5.     return null;
  6.   }
  7. }

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: TrustWallet/trust-wallet-android-source

  1. public static byte[] createTokenTransferData(String to, BigInteger tokenAmount) {
  2.     List<Type> params = Arrays.<Type>asList(new Address(to), new Uint256(tokenAmount));
  4.     List<TypeReference<?>> returnTypes = Arrays.<TypeReference<?>>asList(new TypeReference<Bool>() {
  5.     });
  7.     Function function = new Function("transfer", params, returnTypes);
  8.     String encodedFunction = FunctionEncoder.encode(function);
  9.     return Numeric.hexStringToByteArray(Numeric.cleanHexPrefix(encodedFunction));
  10.   }
  11. }

代码示例来源：origin: web3j/web3j

  1. private void assertCorrectEntropy(String expected, String mnemonic, int size) {
  2.     Assert.assertEquals(expected, Numeric.toHexStringNoPrefixZeroPadded(
  3.         Numeric.toBigInt(MnemonicUtils.generateEntropy(mnemonic)), size));
  4.   }
  5. }

代码示例来源：origin: web3j/web3j

  1. public Transaction(String from, BigInteger nonce, BigInteger gasPrice, BigInteger gasLimit,
  2.           String to, BigInteger value, String data) {
  3.   this.from = from;
  4.   this.to = to;
  5.   this.gas = gasLimit;
  6.   this.gasPrice = gasPrice;
  7.   this.value = value;
  8.   if (data != null) {
  9.     this.data = Numeric.prependHexPrefix(data);
  10.   }
  11.   this.nonce = nonce;
  12. }

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. }

代码示例来源：origin: web3j/web3j

  1. static DynamicBytes decodeDynamicBytes(String input, int offset) {
  2.   int encodedLength = decodeUintAsInt(input, offset);
  3.   int hexStringEncodedLength = encodedLength << 1;
  4.   int valueOffset = offset + MAX_BYTE_LENGTH_FOR_HEX_STRING;
  5.   String data = input.substring(valueOffset,
  6.       valueOffset + hexStringEncodedLength);
  7.   byte[] bytes = Numeric.hexStringToByteArray(data);
  8.   return new DynamicBytes(bytes);
  9. }

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: web3j/web3j

  1. public static String toHexStringWithPrefixSafe(BigInteger value) {
  2.   String result = toHexStringNoPrefix(value);
  3.   if (result.length() < 2) {
  4.     result = Strings.zeros(1) + result;
  5.   }
  6.   return HEX_PREFIX + result;
  7. }

代码示例来源：origin: web3j/web3j

  1. public static boolean isValidPrivateKey(String privateKey) {
  2.   String cleanPrivateKey = Numeric.cleanHexPrefix(privateKey);
  3.   return cleanPrivateKey.length() == PRIVATE_KEY_LENGTH_IN_HEX;
  4. }

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