com.sap.cloud.sdk.services.blockchainbusinessservices.blockchainvisibility

Class MerkleTreeFactory

java.lang.Object

com.sap.cloud.sdk.services.blockchainbusinessservices.blockchainvisibility.MerkleTreeFactory

@Beta
public class MerkleTreeFactory
extends Object

This is the factory class to instantiate the Merkle tree

Constructor Summary

Constructors

Constructor and Description
MerkleTreeFactory()

Method Summary

Modifier and Type	Method and Description
static MerkleTree	build(ProtocolVersion version, MessageDigest messageDigest, Map<Integer,String> leaves, Map<Integer,String> salts) builds a new instance of Merkle tree
static MerkleTree	buildPartialTree(ProtocolVersion version, MessageDigest messageDigest, int numberOfLeaves, Map<Integer,String> knownLeaves, Map<Integer,String> knownSalts, Map<String,String> knownHashes) Creates a Merkle tree with given parameters.
static MerkleTree	buildPartialTree(String version, MessageDigest messageDigest, int numberOfLeaves, Map<Integer,String> knownLeaves, Map<Integer,String> knownSalts, Map<String,String> knownHashes) Creates a Merkle tree with given parameters.

Methods inherited from class java.lang.Object

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

Constructor Detail

MerkleTreeFactory

public MerkleTreeFactory()

Method Detail

build

@Nonnull
public static MerkleTree build(@Nullable
                                        ProtocolVersion version,
                                        @Nonnull
                                        MessageDigest messageDigest,
                                        @Nonnull
                                        Map<Integer,String> leaves,
                                        @Nonnull
                                        Map<Integer,String> salts)

builds a new instance of Merkle tree

Parameters:

version - the version, which defines how the MerkleTree will be built Enforce version to make sure the compatibility

messageDigest - messageDigest instance used to calculate the hash

leaves - the leaves of the MerkleTree

salts - the salts of the MerkleTree

Returns:

MerkleTree

buildPartialTree

@Nonnull
public static MerkleTree buildPartialTree(String version,
                                                   MessageDigest messageDigest,
                                                   int numberOfLeaves,
                                                   Map<Integer,String> knownLeaves,
                                                   Map<Integer,String> knownSalts,
                                                   Map<String,String> knownHashes)

Creates a Merkle tree with given parameters. This tree can lack some of leaves or inner hashes but there should be enough information to rebuild the unique tree.

Parameters:

version - the version, which defines how the MerkleTree will be built Enforce version to make sure the compatibility

messageDigest - messageDigest instance used to calculate the hash

numberOfLeaves - the total number of leaves in the MerkleTree

knownLeaves - the known leaves of the MerkleTree

knownSalts - the salts of the MerkleTree

knownHashes - the known hashes of the MerkleTree

Returns:

MerkleTree

buildPartialTree

@Nonnull
public static MerkleTree buildPartialTree(@Nullable
                                                   ProtocolVersion version,
                                                   @Nonnull
                                                   MessageDigest messageDigest,
                                                   int numberOfLeaves,
                                                   @Nonnull
                                                   Map<Integer,String> knownLeaves,
                                                   @Nonnull
                                                   Map<Integer,String> knownSalts,
                                                   @Nonnull
                                                   Map<String,String> knownHashes)

Creates a Merkle tree with given parameters. This tree can lack some of leaves or inner hashes but there should be enough information to rebuild the unique tree.

Parameters:

version - the version, which defines how the MerkleTree will be built Enforce version to make sure the compatibility

messageDigest - messageDigest instance used to calculate the hash

numberOfLeaves - the total number of leaves in the MerkleTree

knownLeaves - the known leaves of the MerkleTree

knownSalts - the known salts of the MerkleTree

knownHashes - the known hashes of the MerkleTree

Returns:

MerkleTree