Package org.bitcoinj.params

Class BitcoinNetworkParams

java.lang.Object

org.bitcoinj.core.NetworkParameters

org.bitcoinj.params.BitcoinNetworkParams

Direct Known Subclasses:

MainNetParams, RegTestParams, SigNetParams, TestNet3Params, UnitTestParams

public abstract class BitcoinNetworkParams
extends NetworkParameters

Parameters for Bitcoin-like networks.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	BITCOIN_SCHEME	Deprecated. Use BitcoinNetwork.BITCOIN_SCHEME
protected Block	genesisBlock	lazy-initialized by the first call to NetworkParameters.getGenesisBlock()
static final int	REWARD_HALVING_INTERVAL	Block reward halving interval (number of blocks)

Fields inherited from class org.bitcoinj.core.NetworkParameters

addressHeader, addrSeeds, BIP16_ENFORCE_TIME, bip32HeaderP2PKHpriv, bip32HeaderP2PKHpub, bip32HeaderP2WPKHpriv, bip32HeaderP2WPKHpub, checkpoints, defaultSerializer, dnsSeeds, dumpedPrivateKeyHeader, id, interval, INTERVAL, majorityEnforceBlockUpgrade, majorityRejectBlockOutdated, majorityWindow, MAX_COINS, MAX_MONEY, maxTarget, network, p2shHeader, packetMagic, PAYMENT_PROTOCOL_ID_MAINNET, PAYMENT_PROTOCOL_ID_REGTEST, PAYMENT_PROTOCOL_ID_SIGNET, PAYMENT_PROTOCOL_ID_TESTNET, PAYMENT_PROTOCOL_ID_UNIT_TESTS, port, segwitAddressHrp, spendableCoinbaseDepth, subsidyDecreaseBlockCount, TARGET_SPACING, TARGET_TIMESPAN, targetTimespan

Constructor Summary

Constructors

Constructor	Description
BitcoinNetworkParams(BitcoinNetwork network)	No-args constructor

Method Summary

Modifier and Type	Method	Description
void	checkDifficultyTransitions(StoredBlock storedPrev, Block nextBlock, BlockStore blockStore)	Throws an exception if the block's difficulty is not correct.
static BitcoinNetworkParams	fromID(String id)	Return network parameters for a network id
Coin	getBlockInflation(int height)	A utility method that calculates how much new Bitcoin would be created by the block at the given height.
Coin	getMaxMoney()	Deprecated.
MonetaryFormat	getMonetaryFormat()	Deprecated. Get one another way or construct your own MonetaryFormat as needed.
String	getPaymentProtocolId()	Deprecated. Use PaymentProtocol.protocolIdFromParams(NetworkParameters)
BitcoinSerializer	getSerializer()	Construct and return a custom serializer.
String	getUriScheme()	Deprecated.
boolean	hasMaxMoney()	Deprecated.
final boolean	isDifficultyTransitionPoint(int previousHeight)	Checks if we are at a difficulty transition point.
final boolean	isRewardHalvingPoint(int previousHeight)	Checks if we are at a reward halving point.
static BitcoinNetworkParams	of(BitcoinNetwork network)	Return network parameters for a BitcoinNetwork enum

Methods inherited from class org.bitcoinj.core.NetworkParameters

allowEmptyPeerChain, equals, fromAddress, fromPmtProtocolID, getAddressHeader, getAddrSeeds, getBip32HeaderP2PKHpriv, getBip32HeaderP2PKHpub, getBip32HeaderP2WPKHpriv, getBip32HeaderP2WPKHpub, getBlockVerificationFlags, getDefaultSerializer, getDnsSeeds, getDumpedPrivateKeyHeader, getGenesisBlock, getId, getInterval, getMajorityEnforceBlockUpgrade, getMajorityRejectBlockOutdated, getMajorityWindow, getMaxTarget, getP2SHHeader, getPacketMagic, getPort, getProtocolVersionNum, getSegwitAddressHrp, getSpendableCoinbaseDepth, getSubsidyDecreaseBlockCount, getTargetTimespan, getTransactionVerificationFlags, hashCode, isCheckpoint, network, of, passesCheckpoint

Methods inherited from class java.lang.Object

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

Field Details

BITCOIN_SCHEME

@Deprecated
public static final String BITCOIN_SCHEME

Deprecated.

Use BitcoinNetwork.BITCOIN_SCHEME

Scheme part for Bitcoin URIs.

See Also:

• Constant Field Values

REWARD_HALVING_INTERVAL

public static final int REWARD_HALVING_INTERVAL

Block reward halving interval (number of blocks)

See Also:

• Constant Field Values

genesisBlock

protected Block genesisBlock

lazy-initialized by the first call to NetworkParameters.getGenesisBlock()

Constructor Details

BitcoinNetworkParams

public BitcoinNetworkParams(BitcoinNetwork network)

No-args constructor

Method Details

fromID

@Nullable
public static BitcoinNetworkParams fromID(String id)

Return network parameters for a network id

Parameters:

id - the network id

Returns:

the network parameters for the given string ID or NULL if not recognized

of

public static BitcoinNetworkParams of(BitcoinNetwork network)

Return network parameters for a BitcoinNetwork enum

Parameters:

network - the network

Returns:

the network parameters for the given string ID

Throws:

IllegalArgumentException - if unknown network

getPaymentProtocolId

@Deprecated
public String getPaymentProtocolId()

Deprecated.

Use PaymentProtocol.protocolIdFromParams(NetworkParameters)

Specified by:

getPaymentProtocolId in class NetworkParameters

Returns:

the payment protocol network id string

isRewardHalvingPoint

public final boolean isRewardHalvingPoint(int previousHeight)

Checks if we are at a reward halving point.

Parameters:

previousHeight - The height of the previous stored block

Returns:

If this is a reward halving point

getBlockInflation

public Coin getBlockInflation(int height)

A utility method that calculates how much new Bitcoin would be created by the block at the given height. The inflation of Bitcoin is predictable and drops roughly every 4 years (210,000 blocks). At the dawn of the system it was 50 coins per block, in late 2012 it went to 25 coins per block, and so on. The size of a coinbase transaction is inflation plus fees.

The half-life is controlled by NetworkParameters.getSubsidyDecreaseBlockCount().

Parameters:

height - the height of the block to calculate inflation for

Returns:

block reward (inflation) for specified block

isDifficultyTransitionPoint

public final boolean isDifficultyTransitionPoint(int previousHeight)

Checks if we are at a difficulty transition point.

Parameters:

previousHeight - The height of the previous stored block

Returns:

If this is a difficulty transition point

checkDifficultyTransitions

public void checkDifficultyTransitions(StoredBlock storedPrev,
 Block nextBlock,
 BlockStore blockStore)
                                throws VerificationException,
BlockStoreException

Description copied from class: NetworkParameters

Throws an exception if the block's difficulty is not correct.

Specified by:

checkDifficultyTransitions in class NetworkParameters

Parameters:

storedPrev - previous stored block

nextBlock - proposed block

blockStore - active BlockStore

Throws:

VerificationException - if the block's difficulty is not correct.

BlockStoreException - if an error occurred accessing the BlockStore

getMaxMoney

@Deprecated
public Coin getMaxMoney()

Deprecated.

Description copied from class: NetworkParameters

Returns the number of coins that will be produced in total, on this network. Where not applicable, a very large number of coins is returned instead (e.g. the main coin issue for Dogecoin).

Specified by:

getMaxMoney in class NetworkParameters

Returns:

maximum number of coins for this network

getMonetaryFormat

@Deprecated
public MonetaryFormat getMonetaryFormat()

Deprecated.

Get one another way or construct your own MonetaryFormat as needed.

Description copied from class: NetworkParameters

The monetary object for this currency.

Specified by:

getMonetaryFormat in class NetworkParameters

Returns:

formatting utility object

getSerializer

public BitcoinSerializer getSerializer()

Description copied from class: NetworkParameters

Construct and return a custom serializer.

Specified by:

getSerializer in class NetworkParameters

Returns:

the serializer

getUriScheme

@Deprecated
public String getUriScheme()

Deprecated.

Description copied from class: NetworkParameters

Scheme part for URIs, for example "bitcoin".

Specified by:

getUriScheme in class NetworkParameters

Returns:

a string with the "scheme" part

hasMaxMoney

@Deprecated
public boolean hasMaxMoney()

Deprecated.

Description copied from class: NetworkParameters

Returns whether this network has a maximum number of coins (finite supply) or not. Always returns true for Bitcoin, but exists to be overridden for other networks.

Specified by:

hasMaxMoney in class NetworkParameters

Returns:

true if network has a fixed maximum number of coins