com.scalar.dl.ledger.proof

Class AssetProof

java.lang.Object

com.scalar.dl.ledger.proof.AssetProof

@Immutable
public class AssetProof
extends java.lang.Object

A proof stored in client-side to validate the server ledger states.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	AssetProof.Builder
static class	AssetProof.Key
static class	AssetProof.Range

Constructor Summary

Constructors

Constructor and Description
AssetProof(com.scalar.dl.rpc.AssetProof proof) Constructs an AssetProof with the specified AssetProof

Method Summary

Modifier and Type	Method and Description
boolean	equals(java.lang.Object o) Indicates whether some other object is "equal to" this object.
int	getAge() Returns the asset entry's age assigned by the server.
byte[]	getHash() Returns the hash of the asset entry.
java.lang.String	getId() Returns the asset's id.
java.lang.String	getInput()
AssetProof.Key	getKey() Returns the Key of the AssetProof.
java.lang.String	getNonce() Returns the nonce of the asset entry.
byte[]	getPrevHash() Returns the prev_hash of the asset entry.
byte[]	getSignature() Returns the signature of the proof entry.
int	hashCode() Returns a hash code value for the object.
static AssetProof.Builder	newBuilder()
static byte[]	serialize(java.lang.String id, int age, java.lang.String nonce, java.lang.String input, byte[] hash, byte[] prevHash)
java.lang.String	toString()
void	validateWith(SignatureValidator validator) Validates if the proof is not tampered.
boolean	valueEquals(java.lang.Object o) Indicates whether some other object is "equal to" this object except for signature.

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

AssetProof

public AssetProof(com.scalar.dl.rpc.AssetProof proof)

Constructs an AssetProof with the specified AssetProof

Parameters:

proof - a com.scalar.rpc.AssetProof object

Method Detail

getKey

public AssetProof.Key getKey()

Returns the Key of the AssetProof.

Returns:

the Key of the AssetProof

getId

public java.lang.String getId()

Returns the asset's id.

Returns:

the asset's id

getAge

public int getAge()

Returns the asset entry's age assigned by the server.

Returns:

the asset entry's age assigned by the server

getNonce

public java.lang.String getNonce()

Returns the nonce of the asset entry.

Returns:

a nonce created in the client and given from the server

getInput

public java.lang.String getInput()

getHash

public byte[] getHash()

Returns the hash of the asset entry.

Returns:

a hash value calculated for the asset in the server

getPrevHash

@Nullable
public byte[] getPrevHash()

Returns the prev_hash of the asset entry.

Returns:

a prev_hash value calculated for the asset in the server

getSignature

public byte[] getSignature()

Returns the signature of the proof entry.

Returns:

a signature calculated for the proof in the server

validateWith

public void validateWith(SignatureValidator validator)

Validates if the proof is not tampered.

Parameters:

validator - a SignatureValidator

Throws:

SignatureException - if the proof is invalid.

hashCode

public int hashCode()

Returns a hash code value for the object.

Overrides:

hashCode in class java.lang.Object

Returns:

a hash code value for this object.

equals

public boolean equals(java.lang.Object o)

Indicates whether some other object is "equal to" this object. The other object is considered equal if:

• it is also an AssetProof, and
• both instances have the same age, hash, nonce and signature.

Overrides:

equals in class java.lang.Object

Parameters:

o - an object to be tested for equality

Returns:

true if the other object is "equal to" this object otherwise false

valueEquals

public boolean valueEquals(java.lang.Object o)

Indicates whether some other object is "equal to" this object except for signature. The other object is considered equal if:

• it is also an AssetProof, and
• both instances have the same age, hash and nonce.

Parameters:

o - an object to be tested for equality

Returns:

true if the other object is "equal to" this object otherwise false

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

newBuilder

public static AssetProof.Builder newBuilder()

serialize

public static byte[] serialize(java.lang.String id,
                               int age,
                               java.lang.String nonce,
                               java.lang.String input,
                               byte[] hash,
                               byte[] prevHash)