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org.bitcoinj.governance.SuperblockManager Maven / Gradle / Ivy
package org.bitcoinj.governance;
import org.bitcoinj.core.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.ArrayList;
import static org.bitcoinj.governance.GovernanceVote.VoteSignal.VOTE_SIGNAL_FUNDING;
/**
* Created by Hash Engineering on 6/6/2018.
*/
public class SuperblockManager {
private static final Logger log = LoggerFactory.getLogger(SuperblockManager.class);
public static boolean isSuperblockTriggered(int nBlockHeight) {
log.info("gobject--CSuperblockManager::IsSuperblockTriggered -- Start nBlockHeight = {}", nBlockHeight);
if (!Superblock.isValidBlockHeight(Context.get().getParams(), nBlockHeight)) {
return false;
}
Context.get().governanceManager.lock.lock();
try {
// GET ALL ACTIVE TRIGGERS
ArrayList vecTriggers = Context.get().triggerManager.getActiveTriggers();
log.info("gobject--CSuperblockManager::IsSuperblockTriggered -- vecTriggers.size() = {}", vecTriggers.size());
for (Superblock pSuperblock : vecTriggers) {
if (pSuperblock == null) {
log.info("CSuperblockManager::IsSuperblockTriggered -- Non-superblock found, continuing");
log.info( "IsSuperblockTriggered Not a superblock, continuing ");
continue;
}
GovernanceObject pObj = pSuperblock.getGovernanceObject();
if (pObj == null) {
log.info("CSuperblockManager::IsSuperblockTriggered -- pObj == NULL, continuing");
log.info( "IsSuperblockTriggered pObj is NULL, continuing");
continue;
}
log.info("gobject--CSuperblockManager::IsSuperblockTriggered -- data = {}", pObj.getDataAsPlainString());
// note : 12.1 - is epoch calculation correct?
if (nBlockHeight != pSuperblock.getBlockStart()) {
log.info("gobject--CSuperblockManager::IsSuperblockTriggered -- block height doesn't match nBlockHeight = {}, blockStart = {}, continuing", nBlockHeight, pSuperblock.getBlockStart());
continue;
}
// MAKE SURE THIS TRIGGER IS ACTIVE VIA FUNDING CACHE FLAG
pObj.updateSentinelVariables();
if (pObj.isSetCachedFunding()) {
log.info("gobject--CSuperblockManager::IsSuperblockTriggered -- fCacheFunding = true, returning true");
log.info( "IsSuperblockTriggered returning true");
return true;
} else {
log.info("gobject--CSuperblockManager::IsSuperblockTriggered -- fCacheFunding = false, continuing");
log.info( "IsSuperblockTriggered No fCachedFunding, continuing");
}
}
return false;
} finally {
Context.get().governanceManager.lock.unlock();
}
}
public static Superblock getBestSuperblock(int nBlockHeight) {
Context context = Context.get();
if (!Superblock.isValidBlockHeight(context.getParams(), nBlockHeight)) {
return null;
}
context.governanceManager.lock.lock();
try {
Superblock superblockResult = null;
ArrayList vecTriggers = context.triggerManager.getActiveTriggers();
int nYesCount = 0;
for (Superblock pSuperblock : vecTriggers) {
if (pSuperblock == null) {
log.info("GetBestSuperblock Not a superblock, continuing");
continue;
}
GovernanceObject pObj = pSuperblock.getGovernanceObject();
if (pObj == null) {
log.info("GetBestSuperblock pObj is NULL, continuing");
continue;
}
if (nBlockHeight != pSuperblock.getBlockStart()) {
log.info("GetBestSuperblock Not the target block, continuing");
continue;
}
// DO WE HAVE A NEW WINNER?
int nTempYesCount = pObj.getAbsoluteYesCount(VOTE_SIGNAL_FUNDING);
log.info("GetBestSuperblock nTempYesCount = " + nTempYesCount);
if (nTempYesCount > nYesCount) {
nYesCount = nTempYesCount;
superblockResult = pSuperblock;
log.info("GetBestSuperblock Valid superblock found, pSuperblock set");
}
}
return nYesCount > 0 ? superblockResult : null;
} finally {
context.governanceManager.lock.unlock();
}
}
public static Transaction createSuperblock(int nBlockHeight, ArrayList voutSuperblockRet) {
log.info( "CSuperblockManager::CreateSuperblock Start");
Context context = Context.get();
context.governanceManager.lock.lock();
try {
Transaction tx = new Transaction(context.getParams());
// GET THE BEST SUPERBLOCK FOR THIS BLOCK HEIGHT
Superblock pSuperblock = SuperblockManager.getBestSuperblock(nBlockHeight);
if (pSuperblock == null) {
log.info("gobject--CSuperblockManager::CreateSuperblock -- Can't find superblock for height {}", nBlockHeight);
log.info("CSuperblockManager::CreateSuperblock Failed to get superblock for height, returning");
return null;
}
// make sure it's empty, just in case
voutSuperblockRet.clear();
// CONFIGURE SUPERBLOCK OUTPUTS
// Superblock payments are appended to the end of the coinbase vout vector
log.info("CSuperblockManager::CreateSuperblock Number payments: " + pSuperblock.countPayments());
// TODO: How many payments can we add before things blow up?
// Consider at least following limits:
// - max coinbase tx size
// - max "budget" available
for (int i = 0; i < pSuperblock.countPayments(); i++) {
GovernancePayment payment = pSuperblock.getPayment(i);
log.info("CSuperblockManager::CreateSuperblock i = " + i);
if (payment != null) {
log.info("CSuperblockManager::CreateSuperblock Payment found");
// SET COINBASE OUTPUT TO SUPERBLOCK SETTING
TransactionOutput txout = new TransactionOutput(context.getParams(), null, payment.nAmount, payment.script.getProgram());
tx.addOutput(txout);
voutSuperblockRet.add(txout);
// PRINT NICE LOG OUTPUT FOR SUPERBLOCK PAYMENT
Address address = payment.script.getToAddress(context.getParams());
// TODO: PRINT NICE N.N DASH OUTPUT
log.info("CSuperblockManager::CreateSuperblock Before log.info call, nAmount = " + payment.nAmount);
log.info("NEW Superblock : output {} (addr {}, amount {})", i, address.toString(), payment.nAmount);
log.info("CSuperblockManager::CreateSuperblock After log.info call");
} else {
log.info("CSuperblockManager::CreateSuperblock Payment not found");
}
}
log.info( "CSuperblockManager::CreateSuperblock End");
return tx;
} finally {
context.governanceManager.lock.unlock();
}
}
//C++ TO JAVA CONVERTER TODO TASK: The implementation of the following method could not be found:
// static String getRequiredPaymentsString(int nBlockHeight);
public static boolean isValid(Transaction txNew, int nBlockHeight, Coin blockReward) {
// GET BEST SUPERBLOCK, SHOULD MATCH
Context context = Context.get();
context.governanceManager.lock.lock();
try {
Superblock pSuperblock = SuperblockManager.getBestSuperblock(nBlockHeight);
if (pSuperblock != null) {
return pSuperblock.isValid(txNew, nBlockHeight, blockReward);
}
return false;
} finally {
context.governanceManager.lock.unlock();
}
}
static String getRequiredPaymentsString(int nBlockHeight)
{
Context context = Context.get();
context.governanceManager.lock.lock();
try {
String ret = "Unknown";
// GET BEST SUPERBLOCK
Superblock pSuperblock = getBestSuperblock(nBlockHeight);
if (pSuperblock == null) {
log.info("gobject--CSuperblockManager::GetRequiredPaymentsString -- Can't find superblock for height {}", nBlockHeight);
return "error";
}
// LOOP THROUGH SUPERBLOCK PAYMENTS, CONFIGURE OUTPUT STRING
for (int i = 0; i < pSuperblock.countPayments(); i++) {
GovernancePayment payment = pSuperblock.getPayment(i);
if (payment != null) {
// PRINT NICE LOG OUTPUT FOR SUPERBLOCK PAYMENT
Address address = payment.script.getToAddress(context.getParams());
// RETURN NICE OUTPUT FOR CONSOLE
if (ret != "Unknown") {
ret += ", " + address;
} else {
ret = address.toString();
}
}
}
return ret;
} finally {
context.governanceManager.lock.unlock();
}
}
}
