HeadersMessage (bitcoinj-core 0.17-alpha1 API)

java.lang.Object
- org.bitcoinj.core.Message
- - org.bitcoinj.core.HeadersMessage

```
public class HeadersMessage
extends Message
```
A protocol message that contains a repeated series of block headers, sent in response to the "getheaders" command. This is useful when you want to traverse the chain but know you don't care about the block contents, for example, because you have a freshly created wallet with no keys.

Instances of this class are not safe for use by multiple threads.

Field Summary

Fields
Modifier and Type Field Description

static int MAX_HEADERS
- Fields inherited from class org.bitcoinj.core.Message
  MAX_SIZE, params, payload, serializer

Constructor Summary

Constructors
Constructor	Description
`HeadersMessage(NetworkParameters params, java.nio.ByteBuffer payload)`
`HeadersMessage(NetworkParameters params, java.util.List<Block> headers)`
`HeadersMessage(NetworkParameters params, Block... headers)`

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`bitcoinSerializeToStream(java.io.OutputStream stream)`	Serializes this message to the provided stream.
`java.util.List<Block>`	`getBlockHeaders()`
`protected void`	`parse()`

Methods inherited from class org.bitcoinj.core.Message
bitcoinSerialize, getHash, getMessageSize, getParams, readByte, readByteArray, readBytes, readHash, readInt32, readInt64, readStr, readUint32, readUint64, readVarInt, skipBytes, unCache, unsafeBitcoinSerialize

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail
- MAX_HEADERS
```
public static final int MAX_HEADERS
```
  See Also:
  
  Constant Field Values

Constructor Detail

HeadersMessage

public HeadersMessage(NetworkParameters params,
                      java.nio.ByteBuffer payload)
               throws ProtocolException

Throws:: ProtocolException

HeadersMessage

public HeadersMessage(NetworkParameters params,
                      Block... headers)
               throws ProtocolException

Throws:: ProtocolException

HeadersMessage

public HeadersMessage(NetworkParameters params,
                      java.util.List<Block> headers)
               throws ProtocolException

Throws:: ProtocolException

Method Detail
- bitcoinSerializeToStream
```
public void bitcoinSerializeToStream(java.io.OutputStream stream)
                              throws java.io.IOException
```
  Description copied from class: Message
  
  Serializes this message to the provided stream. If you just want the raw bytes use bitcoinSerialize().
  
  Overrides:
  
  bitcoinSerializeToStream in class Message
  
  Throws:
  
  java.io.IOException
- parse
```
protected void parse()
              throws java.nio.BufferUnderflowException,
                     ProtocolException
```
  Specified by:
  
  parse in class Message
  
  Throws:
  
  java.nio.BufferUnderflowException
  
  ProtocolException
- getBlockHeaders
```
public java.util.List<Block> getBlockHeaders()
```