GetDataMessage (bitcoinj-core 0.16.2 API)

java.lang.Object
- org.bitcoinj.core.Message
- - org.bitcoinj.core.ListMessage
  - - org.bitcoinj.core.GetDataMessage

```
public class GetDataMessage
extends ListMessage
```
Represents the "getdata" P2P network message, which requests the contents of blocks or transactions given their hashes.

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

Field Summary
- Fields inherited from class org.bitcoinj.core.ListMessage
  items, MAX_INVENTORY_ITEMS
- Fields inherited from class org.bitcoinj.core.Message
  cursor, length, MAX_SIZE, offset, params, payload, recached, serializer, UNKNOWN_LENGTH

Constructor Summary

Constructors
Constructor	Description
`GetDataMessage(NetworkParameters params)`
`GetDataMessage(NetworkParameters params, byte[] payloadBytes)`
`GetDataMessage(NetworkParameters params, byte[] payload, MessageSerializer serializer, int length)`	Deserializes a 'getdata' message.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`addBlock(Sha256Hash hash, boolean includeWitness)`
`void`	`addFilteredBlock(Sha256Hash hash)`
`void`	`addTransaction(Sha256Hash hash, boolean includeWitness)`
`Sha256Hash`	`getHashOf(int i)`

Methods inherited from class org.bitcoinj.core.ListMessage
addItem, bitcoinSerializeToStream, equals, getItems, hashCode, parse, removeItem, toString

Methods inherited from class org.bitcoinj.core.Message
adjustLength, bitcoinSerialize, bitcoinSerialize, getHash, getMessageSize, getParams, hasMoreBytes, isCached, isRecached, readByte, readByteArray, readBytes, readHash, readInt64, readStr, readUint32, readUint64, readVarInt, readVarInt, setSerializer, unCache, unsafeBitcoinSerialize

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

Constructor Detail
- GetDataMessage
```
public GetDataMessage(NetworkParameters params,
                      byte[] payloadBytes)
               throws ProtocolException
```
  Throws:
  
  ProtocolException
- GetDataMessage
```
public GetDataMessage(NetworkParameters params,
                      byte[] payload,
                      MessageSerializer serializer,
                      int length)
               throws ProtocolException
```
  Deserializes a 'getdata' message.
  
  Parameters:
  
  params - NetworkParameters object.
  
  payload - Bitcoin protocol formatted byte array containing message content.
  
  serializer - the serializer to use for this message.
  
  length - The length of message if known. Usually this is provided when deserializing of the wire as the length will be provided as part of the header. If unknown then set to Message.UNKNOWN_LENGTH
  
  Throws:
  
  ProtocolException
- GetDataMessage
```
public GetDataMessage(NetworkParameters params)
```

Method Detail

addTransaction

public void addTransaction(Sha256Hash hash,
                           boolean includeWitness)

addBlock

public void addBlock(Sha256Hash hash,
                     boolean includeWitness)

addFilteredBlock

public void addFilteredBlock(Sha256Hash hash)

getHashOf

public Sha256Hash getHashOf(int i)