io.neow3j.utils

Class Numeric

java.lang.Object

io.neow3j.utils.Numeric

public final class Numeric
extends java.lang.Object

Message codec functions.

Implementation as per https://github.com/ethereum/wiki/wiki/JSON-RPC#hex-value-encoding

Method Summary

Modifier and Type	Method and Description
static byte	asByte(int m, int n)
static java.lang.String	cleanHexPrefix(java.lang.String input)
static boolean	containsHexPrefix(java.lang.String input)
static java.math.BigInteger	decodeQuantity(java.lang.String value)
static java.lang.String	encodeQuantity(java.math.BigInteger value)
static byte[]	fromBigDecimalToFixed8Bytes(java.math.BigDecimal value) Converts the given decimal number to a Fixed8 in the form of 8 bytes in big-endian order.
static byte[]	fromBigDecimalToFixed8Bytes(java.lang.String value) Converts the given decimal number to a Fixed8 in the form of 8 bytes in big-endian order.
static java.math.BigInteger	fromDecimalToFixed8(java.math.BigDecimal value) Converts the given decimal number to a Fixed8 in the form of an integer.
static java.math.BigInteger	fromDecimalToFixed8(java.lang.String value) Converts the given decimal number to a Fixed8 in the form of an integer.
static java.math.BigDecimal	fromFixed8ToDecimal(java.math.BigInteger value) Converts the given Fixed8 number to a BigDecimal.
static java.math.BigDecimal	fromFixed8ToDecimal(byte[] value) Converts the given Fixed8 number to a BigDecimal.
static byte[]	fromIntegerToFixed8Bytes(java.math.BigInteger value)
static byte[]	hexStringToByteArray(java.lang.String input)
static java.math.BigInteger	hexToInteger(java.lang.String input)
static java.lang.String	hexToString(java.lang.String input)
static boolean	isIntegerValue(java.math.BigDecimal value)
static boolean	isValidHexString(java.lang.String string) Checks if the given string is a valid hexadecimal string.
static java.lang.String	prependHexPrefix(java.lang.String input)
static java.lang.String	reverseHexString(java.lang.String input)
static java.math.BigInteger	toBigInt(byte[] value)
static java.math.BigInteger	toBigInt(byte[] value, int offset, int length)
static java.math.BigInteger	toBigInt(java.lang.String hexValue)
static java.math.BigInteger	toBigIntNoPrefix(java.lang.String hexValue)
static byte[]	toBytesPadded(java.math.BigInteger value, int length)
static java.lang.String	toHexString(byte input)
static java.lang.String	toHexString(byte[] input)
static java.lang.String	toHexString(byte[] input, int offset, int length, boolean withPrefix)
static java.lang.String	toHexStringNoPrefix(java.math.BigInteger value)
static java.lang.String	toHexStringNoPrefix(byte input)
static java.lang.String	toHexStringNoPrefix(byte[] input)
static java.lang.String	toHexStringNoPrefixZeroPadded(java.math.BigInteger value, int size)
static java.lang.String	toHexStringWithPrefix(java.math.BigInteger value)
static java.lang.String	toHexStringWithPrefixSafe(java.math.BigInteger value)
static java.lang.String	toHexStringWithPrefixZeroPadded(java.math.BigInteger value, int size)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

encodeQuantity

public static java.lang.String encodeQuantity(java.math.BigInteger value)

decodeQuantity

public static java.math.BigInteger decodeQuantity(java.lang.String value)

cleanHexPrefix

public static java.lang.String cleanHexPrefix(java.lang.String input)

prependHexPrefix

public static java.lang.String prependHexPrefix(java.lang.String input)

containsHexPrefix

public static boolean containsHexPrefix(java.lang.String input)

isValidHexString

public static boolean isValidHexString(java.lang.String string)

Checks if the given string is a valid hexadecimal string. Next to the character constraint (0-f) the string also needs to have a even number of character to pass as valid.

Parameters:

string - The string to check.

Returns:

true, if the string is hexadecimal or empty. False, otherwise.

fromFixed8ToDecimal

public static java.math.BigDecimal fromFixed8ToDecimal(byte[] value)

Converts the given Fixed8 number to a BigDecimal. This means that the resulting number is represented using a decimal point.

Parameters:

value - The Fixed8 value as a byte array. Must be 8 bytes in big-endian order.

Returns:

converted BigDecimal value.

fromFixed8ToDecimal

public static java.math.BigDecimal fromFixed8ToDecimal(java.math.BigInteger value)

Converts the given Fixed8 number to a BigDecimal. This means that the resulting number is represented using a decimal point.

Parameters:

value - The Fixed8 value as an integer.

Returns:

converted BigDecimal value.

fromDecimalToFixed8

public static java.math.BigInteger fromDecimalToFixed8(java.lang.String value)

Converts the given decimal number to a Fixed8 in the form of an integer.

Parameters:

value - The decimal number to convert.

Returns:

converted BigInteger value.

fromDecimalToFixed8

public static java.math.BigInteger fromDecimalToFixed8(java.math.BigDecimal value)

Converts the given decimal number to a Fixed8 in the form of an integer.

Parameters:

value - The decimal number to convert.

Returns:

converted BigInteger value.

fromBigDecimalToFixed8Bytes

public static byte[] fromBigDecimalToFixed8Bytes(java.lang.String value)

Converts the given decimal number to a Fixed8 in the form of 8 bytes in big-endian order.

Parameters:

value - The decimal number to convert.

Returns:

converted byte array.

fromBigDecimalToFixed8Bytes

public static byte[] fromBigDecimalToFixed8Bytes(java.math.BigDecimal value)

Converts the given decimal number to a Fixed8 in the form of 8 bytes in big-endian order.

Parameters:

value - The decimal number to convert.

Returns:

the Fixed8 as a byte array.

fromIntegerToFixed8Bytes

public static byte[] fromIntegerToFixed8Bytes(java.math.BigInteger value)

toBigInt

public static java.math.BigInteger toBigInt(byte[] value,
                                            int offset,
                                            int length)

toBigInt

public static java.math.BigInteger toBigInt(byte[] value)

toBigInt

public static java.math.BigInteger toBigInt(java.lang.String hexValue)

toBigIntNoPrefix

public static java.math.BigInteger toBigIntNoPrefix(java.lang.String hexValue)

toHexStringWithPrefix

public static java.lang.String toHexStringWithPrefix(java.math.BigInteger value)

toHexStringNoPrefix

public static java.lang.String toHexStringNoPrefix(java.math.BigInteger value)

toHexStringNoPrefix

public static java.lang.String toHexStringNoPrefix(byte input)

toHexStringNoPrefix

public static java.lang.String toHexStringNoPrefix(byte[] input)

toHexStringWithPrefixZeroPadded

public static java.lang.String toHexStringWithPrefixZeroPadded(java.math.BigInteger value,
                                                               int size)

toHexStringWithPrefixSafe

public static java.lang.String toHexStringWithPrefixSafe(java.math.BigInteger value)

toHexStringNoPrefixZeroPadded

public static java.lang.String toHexStringNoPrefixZeroPadded(java.math.BigInteger value,
                                                             int size)

toBytesPadded

public static byte[] toBytesPadded(java.math.BigInteger value,
                                   int length)

hexStringToByteArray

public static byte[] hexStringToByteArray(java.lang.String input)

toHexString

public static java.lang.String toHexString(byte[] input,
                                           int offset,
                                           int length,
                                           boolean withPrefix)

toHexString

public static java.lang.String toHexString(byte input)

toHexString

public static java.lang.String toHexString(byte[] input)

hexToString

public static java.lang.String hexToString(java.lang.String input)

hexToInteger

public static java.math.BigInteger hexToInteger(java.lang.String input)

reverseHexString

public static java.lang.String reverseHexString(java.lang.String input)

asByte

public static byte asByte(int m,
                          int n)

isIntegerValue

public static boolean isIntegerValue(java.math.BigDecimal value)