com.google.bitcoin.core

Class FilteredBlock

java.lang.Object

com.google.bitcoin.core.Message

com.google.bitcoin.core.FilteredBlock

All Implemented Interfaces:

Serializable

public class FilteredBlock
extends Message

A FilteredBlock is used to relay a block with its transactions filtered using a BloomFilter. It consists of the block header and a PartialMerkleTree which contains the transactions which matched the filter.

See Also:

Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class com.google.bitcoin.core.Message

Message.LazyParseException

Field Summary

Fields

Modifier and Type	Field and Description
static int	MIN_PROTOCOL_VERSION The protocol version at which Bloom filtering started to be supported.

Fields inherited from class com.google.bitcoin.core.Message

bytes, checksum, cursor, length, MAX_SIZE, offset, params, parsed, parseLazy, parseRetain, protocolVersion, recached, UNKNOWN_LENGTH

Constructor Summary

Constructors

Constructor and Description
FilteredBlock(NetworkParameters params, byte[] payloadBytes)

Method Summary

Methods

Modifier and Type	Method and Description
void	bitcoinSerializeToStream(OutputStream stream) Serializes this message to the provided stream.
Map<Sha256Hash,Transaction>	getAssociatedTransactions() Gets the set of transactions which were provided using provideTransaction() which match in getTransactionHashes()
Block	getBlockHeader() Gets a copy of the block header
Sha256Hash	getHash() Gets the hash of the block represented in this Filtered Block
int	getTransactionCount() Number of transactions in this block, before it was filtered
List<Sha256Hash>	getTransactionHashes() Gets a list of leaf hashes which are contained in the partial merkle tree in this filtered block
protected void	parseLite() Perform the most minimal parse possible to calculate the length of the message.
boolean	provideTransaction(Transaction tx) Provide this FilteredBlock with a transaction which is in its merkle tree

Methods inherited from class com.google.bitcoin.core.Message

adjustLength, bitcoinSerialize, bitcoinSerialize, ensureParsed, getMessageSize, getParams, isCached, isParsed, isRecached, maybeParse, unCache, unsafeBitcoinSerialize

Methods inherited from class java.lang.Object

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

Field Detail

MIN_PROTOCOL_VERSION

public static final int MIN_PROTOCOL_VERSION

The protocol version at which Bloom filtering started to be supported.

See Also:

Constant Field Values

Constructor Detail

FilteredBlock

public FilteredBlock(NetworkParameters params,
             byte[] payloadBytes)
              throws ProtocolException

Throws:

ProtocolException

Method Detail

bitcoinSerializeToStream

public void bitcoinSerializeToStream(OutputStream stream)
                              throws IOException

Description copied from class: Message

Serializes this message to the provided stream. If you just want the raw bytes use bitcoinSerialize().

Throws:

IOException

parseLite

protected void parseLite()
                  throws ProtocolException

Description copied from class: Message

Perform the most minimal parse possible to calculate the length of the message. This is only required for subclasses of ChildClass as root level messages will have their length passed into the constructor.

Implementations should adhere to the following contract: If parseLazy = true the 'length' field must be set before returning. If parseLazy = false the length field must be set either within the parseLite() method OR the parse() method. The overriding requirement is that length must be set to non UNKNOWN_MESSAGE value by the time the constructor exits.

Specified by:

parseLite in class Message

Throws:

ProtocolException

getTransactionHashes

public List<Sha256Hash> getTransactionHashes()
                                      throws VerificationException

Gets a list of leaf hashes which are contained in the partial merkle tree in this filtered block

Throws:

ProtocolException - If the partial merkle block is invalid or the merkle root of the partial merkle block doesnt match the block header

VerificationException

getBlockHeader

public Block getBlockHeader()

Gets a copy of the block header

getHash

public Sha256Hash getHash()

Gets the hash of the block represented in this Filtered Block

Overrides:

getHash in class Message

provideTransaction

public boolean provideTransaction(Transaction tx)
                           throws VerificationException

Provide this FilteredBlock with a transaction which is in its merkle tree

Throws:

VerificationException

getAssociatedTransactions

public Map<Sha256Hash,Transaction> getAssociatedTransactions()

Gets the set of transactions which were provided using provideTransaction() which match in getTransactionHashes()

getTransactionCount

public int getTransactionCount()

Number of transactions in this block, before it was filtered