Package org.bitcoinj.core

Class SegwitAddress

java.lang.Object

org.bitcoinj.core.PrefixedChecksummedBytes

org.bitcoinj.core.Address

org.bitcoinj.core.SegwitAddress

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, java.lang.Comparable<Address>

public class SegwitAddress
extends Address

Implementation of native segwit addresses. They are composed of two parts:

• A human-readable part (HRP) which is a string the specifies the network. See NetworkParameters.getSegwitAddressHrp().
• A data part, containing the witness version (encoded as an OP_N operator) and program (encoded by re-arranging bits into groups of 5).

See BIP350 and BIP173 for details.

However, you don't need to care about the internals. Use fromBech32(NetworkParameters, String), fromHash(NetworkParameters, byte[]) or fromKey(NetworkParameters, ECKey) to construct a native segwit address.

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Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static int	WITNESS_PROGRAM_LENGTH_PKH
static int	WITNESS_PROGRAM_LENGTH_SH
static int	WITNESS_PROGRAM_LENGTH_TR
static int	WITNESS_PROGRAM_MAX_LENGTH
static int	WITNESS_PROGRAM_MIN_LENGTH

Fields inherited from class org.bitcoinj.core.PrefixedChecksummedBytes

bytes, params

Method Summary

Modifier and Type	Method	Description
int	compareTo(Address o)	Comparison field order for addresses is: NetworkParameters.getId() Legacy vs.
static SegwitAddress	fromBech32(NetworkParameters params, java.lang.String bech32)	Construct a SegwitAddress from its textual form.
static SegwitAddress	fromHash(NetworkParameters params, byte[] hash)	Construct a SegwitAddress that represents the given hash, which is either a pubkey hash or a script hash.
static SegwitAddress	fromKey(NetworkParameters params, ECKey key)	Construct a SegwitAddress that represents the public part of the given ECKey.
static SegwitAddress	fromProgram(NetworkParameters params, int witnessVersion, byte[] witnessProgram)	Construct a SegwitAddress that represents the given program, which is either a pubkey, a pubkey hash or a script hash – depending on the script version.
byte[]	getHash()	Get either the public key hash or script hash that is encoded in the address.
Script.ScriptType	getOutputScriptType()	Get the type of output script that will be used for sending to the address.
byte[]	getWitnessProgram()	Returns the witness program in decoded form.
int	getWitnessVersion()	Returns the witness version in decoded form.
java.lang.String	toBech32()	Returns the textual form of the address.
java.lang.String	toString()

Methods inherited from class org.bitcoinj.core.Address

compareAddressPartial, fromKey, fromString

Methods inherited from class org.bitcoinj.core.PrefixedChecksummedBytes

clone, equals, getParameters, hashCode

Methods inherited from class java.lang.Object

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

Field Detail

WITNESS_PROGRAM_LENGTH_PKH

public static final int WITNESS_PROGRAM_LENGTH_PKH

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Constant Field Values

WITNESS_PROGRAM_LENGTH_SH

public static final int WITNESS_PROGRAM_LENGTH_SH

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Constant Field Values

WITNESS_PROGRAM_LENGTH_TR

public static final int WITNESS_PROGRAM_LENGTH_TR

See Also:

Constant Field Values

WITNESS_PROGRAM_MIN_LENGTH

public static final int WITNESS_PROGRAM_MIN_LENGTH

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Constant Field Values

WITNESS_PROGRAM_MAX_LENGTH

public static final int WITNESS_PROGRAM_MAX_LENGTH

See Also:

Constant Field Values

Method Detail

getWitnessVersion

public int getWitnessVersion()

Returns the witness version in decoded form. Only versions 0 and 1 are in use right now.

Returns:

witness version, between 0 and 16

getWitnessProgram

public byte[] getWitnessProgram()

Returns the witness program in decoded form.

Returns:

witness program

getHash

public byte[] getHash()

Description copied from class: Address

Get either the public key hash or script hash that is encoded in the address.

Specified by:

getHash in class Address

Returns:

hash that is encoded in the address

getOutputScriptType

public Script.ScriptType getOutputScriptType()

Get the type of output script that will be used for sending to the address. This is either Script.ScriptType.P2WPKH or Script.ScriptType.P2WSH.

Specified by:

getOutputScriptType in class Address

Returns:

type of output script

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object

fromBech32

public static SegwitAddress fromBech32(@Nullable
                                       NetworkParameters params,
                                       java.lang.String bech32)
                                throws AddressFormatException

Construct a SegwitAddress from its textual form.

Parameters:

params - expected network this address is valid for, or null if the network should be derived from the bech32

bech32 - bech32-encoded textual form of the address

Returns:

constructed address

Throws:

AddressFormatException - if something about the given bech32 address isn't right

fromHash

public static SegwitAddress fromHash(NetworkParameters params,
                                     byte[] hash)

Construct a SegwitAddress that represents the given hash, which is either a pubkey hash or a script hash. The resulting address will be either a P2WPKH or a P2WSH type of address.

Parameters:

params - network this address is valid for

hash - 20-byte pubkey hash or 32-byte script hash

Returns:

constructed address

fromProgram

public static SegwitAddress fromProgram(NetworkParameters params,
                                        int witnessVersion,
                                        byte[] witnessProgram)

Construct a SegwitAddress that represents the given program, which is either a pubkey, a pubkey hash or a script hash – depending on the script version. The resulting address will be either a P2WPKH, a P2WSH or a P2TR type of address.

Parameters:

params - network this address is valid for

witnessVersion - version number between 0 and 16

witnessProgram - version dependent witness program

Returns:

constructed address

fromKey

public static SegwitAddress fromKey(NetworkParameters params,
                                    ECKey key)

Construct a SegwitAddress that represents the public part of the given ECKey. Note that an address is derived from a hash of the public key and is not the public key itself.

Parameters:

params - network this address is valid for

key - only the public part is used

Returns:

constructed address

toBech32

public java.lang.String toBech32()

Returns the textual form of the address.

Returns:

textual form encoded in bech32

compareTo

public int compareTo(Address o)

Comparison field order for addresses is:

1. NetworkParameters.getId()
2. Legacy vs. Segwit
3. (Legacy only) Version byte
4. remaining bytes

Implementations may use compareAddressPartial for tests 1 and 2.

Specified by:

compareTo in interface java.lang.Comparable<Address>

Specified by:

compareTo in class Address

Parameters:

o - other Address object

Returns:

comparison result