ch.epfl.dedis.lib

Class SkipBlock

java.lang.Object

ch.epfl.dedis.lib.SkipBlock

public class SkipBlock
extends Object

SkipBlock is a wrapper around the protobuf SkipBlock class. It is mainly used to serialize the genesis block for storage.

Constructor Summary

Constructors

Constructor and Description
SkipBlock(byte[] sb)
SkipBlock(SkipchainProto.SkipBlock skipBlock)

Method Summary

Modifier and Type	Method and Description
boolean	equals(Object obj)
byte[]	getData()
List<ForwardLink>	getForwardLinks()
byte[]	getHash()
SkipblockId	getId()
int	getIndex()
byte[]	getPayload()
SkipchainProto.SkipBlock	getProto()
Roster	getRoster() Gets the roster from the skipblock.
SkipblockId	getSkipchainId()
byte[]	toByteArray()

Methods inherited from class java.lang.Object

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

Constructor Detail

SkipBlock

public SkipBlock(SkipchainProto.SkipBlock skipBlock)

Parameters:

skipBlock - the protobuf definition of the skipblock.

SkipBlock

public SkipBlock(byte[] sb)
          throws CothorityException

Parameters:

sb - the binary representation of the protobuf of the skipblock.

Throws:

CothorityException - if something goes wrong

Method Detail

getHash

public byte[] getHash()

Returns:

the hash of the block, which includes the backward-links and the data.

getId

public SkipblockId getId()

Returns:

the id of the block, which is its hash.

getSkipchainId

public SkipblockId getSkipchainId()
                           throws CothorityCryptoException

Returns:

the id of the skipchain this block is part of. This is equal to the hash for the genesis block.

Throws:

CothorityCryptoException - if there's a problem with the cryptography

getData

public byte[] getData()

Returns:

the data of the block, which is protected by the block hash.

getPayload

public byte[] getPayload()

Returns:

the payload of the block, which is not directly protected by the block hash.

getIndex

public int getIndex()

Returns:

the index of the skipblock - the genesis block has index 0.

getForwardLinks

public List<ForwardLink> getForwardLinks()

Returns:

the list of all forwardlinks contained in this block. There might be no forward link at all, if this is the tip of the chain.

getRoster

public Roster getRoster()
                 throws CothorityException

Gets the roster from the skipblock.

Returns:

the roster responsible for that skipblock

Throws:

CothorityException - if something went wrong

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toByteArray

public byte[] toByteArray()

Returns:

the serialized skipblock.

getProto

public SkipchainProto.SkipBlock getProto()

Returns:

the protobuf representation of the block.