Client and backend. This class is shared: the same code is compiled into your app and into your server, so everything on this page works in both.

public final class Rlp

Recursive Length Prefix encoding as used by Ethereum. Items are either byte arrays or lists of items. Decoding rejects every non-canonical form.

Methods

`public static byte[] encode(Object item)`	Encodes a byte array or a nested `List` of them.
`public static byte[] encodeLong(long value)`	Encodes a non-negative long as a minimal big-endian byte string (zero is the empty string).
`public static byte[] encodeQuantity(UInt256 value)`	Encodes a 256-bit quantity as a minimal big-endian byte string (zero is the empty string).
`public static byte[] longBytes(long value)`	Returns the minimal big-endian bytes of a non-negative long, empty for zero.
`public static` `Object decode(byte[] data)`	Decodes one RLP item that must span the whole input.

public static byte[] encode(Object item)

Encodes a byte array or a nested List of them.

item Object: a byte[] or a java.util.List whose elements are again either

the RLP bytes

IllegalArgumentException: if an element is neither a byte array nor a list

public static byte[] encodeLong(long value)

Encodes a non-negative long as a minimal big-endian byte string (zero is the empty string).

the RLP bytes

public static byte[] encodeQuantity(UInt256 value)

Encodes a 256-bit quantity as a minimal big-endian byte string (zero is the empty string).

the RLP bytes

public static byte[] longBytes(long value)

Returns the minimal big-endian bytes of a non-negative long, empty for zero.

the unpadded bytes, for use as an RLP string item

public static Object decode(byte[] data)

Decodes one RLP item that must span the whole input.

a byte[] for a string or a java.util.List of decoded items for a list

IllegalArgumentException: if the input is truncated, has trailing bytes or is not canonical