Package ch.bitagent.bitcoin.lib.ecc

Class S256Point

java.lang.Object

ch.bitagent.bitcoin.lib.ecc.Point

ch.bitagent.bitcoin.lib.ecc.S256Point

public class S256Point
extends Point

A point (public key) on a secp256k1 elliptic curve

Field Summary

Fields

Modifier and Type	Field	Description
static Int	N	Constant N
static Int	P

Constructor Summary

Constructors

Constructor	Description
S256Point(S256Field x, S256Field y)	Constructor for S256Point.

Method Summary

Modifier and Type	Method	Description
S256Point	add(Point other)	add.
String	address(Boolean compressed, boolean testnet)	Returns the address string
String	addressBech32P2tr(boolean testnet)
String	addressBech32P2wpkh(boolean testnet)	Returns the bech32 p2wpkh address
static S256Point	getG()	Getter for the field g.
boolean	hasEvenY()
byte[]	hash160(Boolean compressed)	hash160.
static S256Point	liftX(Int x)
S256Point	mul(Int coefficient)	mul.
static S256Point	parse(byte[] secBin)	returns a Point object from a SEC binary (not hex)
byte[]	sec(Boolean compressed)	returns the binary version of the SEC format
String	toString()
boolean	verify(Int z, Signature signature)	verify.

Methods inherited from class ch.bitagent.bitcoin.lib.ecc.Point

eq, getA, getB, getNum, getPrime, getX, getY, ne

Methods inherited from class java.lang.Object

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

Field Detail

N

public static final Int N

Constant N

P

public static final Int P

Constructor Detail

S256Point

public S256Point(S256Field x,
                 S256Field y)

Constructor for S256Point.

Parameters:

x - a S256Field object

y - a S256Field object

Method Detail

getG

public static S256Point getG()

Getter for the field g.

Returns:

a S256Point object

add

public S256Point add(Point other)

add.

Overrides:

add in class Point

Parameters:

other - a Point object

Returns:

a Point object

mul

public S256Point mul(Int coefficient)

mul.

Overrides:

mul in class Point

Parameters:

coefficient - a Int object

Returns:

a Point object

verify

public boolean verify(Int z,
                      Signature signature)

verify.

Parameters:

z - a Int object

signature - a Signature object

Returns:

a boolean

sec

public byte[] sec(Boolean compressed)

returns the binary version of the SEC format

Parameters:

compressed - a Boolean object

Returns:

an array of byte objects

hash160

public byte[] hash160(Boolean compressed)

hash160.

Parameters:

compressed - a Boolean object

Returns:

an array of byte objects

address

public String address(Boolean compressed,
                      boolean testnet)

Returns the address string

Parameters:

compressed - a Boolean object

testnet - a boolean

Returns:

a String object

addressBech32P2wpkh

public String addressBech32P2wpkh(boolean testnet)

Returns the bech32 p2wpkh address

Parameters:

testnet -

Returns:

addressBech32P2tr

public String addressBech32P2tr(boolean testnet)

parse

public static S256Point parse(byte[] secBin)

returns a Point object from a SEC binary (not hex)

Parameters:

secBin - an array of byte objects

Returns:

a S256Point object

liftX

public static S256Point liftX(Int x)

hasEvenY

public boolean hasEvenY()

toString

public String toString()

Overrides:

toString in class Point