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package org.bitcoinj.governance;
import org.bitcoinj.core.*;
import org.bitcoinj.utils.BtcFormat;
import org.json.JSONObject;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.text.ParseException;
import java.util.*;
public class Superblock extends GovernanceObject {
private static final Logger log = LoggerFactory.getLogger(Superblock.class);
private Sha256Hash nGovObjHash;
private int nEpochStart;
private int nStatus;
private ArrayList vecPayments;;
Superblock(NetworkParameters params) {
super(params);
nGovObjHash = Sha256Hash.ZERO_HASH;
nEpochStart = 0;
nStatus = SEEN_OBJECT_UNKNOWN;
vecPayments = new ArrayList();
}
Superblock(NetworkParameters params, Sha256Hash nHash) throws SuperblockException {
super(params);
nGovObjHash = nHash;
nEpochStart = 0;
nStatus = SEEN_OBJECT_UNKNOWN;
vecPayments = new ArrayList();
log.info("CSuperblock Constructor Start");
GovernanceObject pGovObj = getGovernanceObject();
if(pGovObj == null) {
log.info("CSuperblock Constructor pGovObjIn is NULL, returning");
throw new SuperblockException("CSuperblock: Failed to find Governance Object");
}
log.info("CSuperblock Constructor pGovObj : "
+ pGovObj.getDataAsPlainString()
+ ", nObjectType = " + pGovObj.getObjectType());
if (pGovObj.getObjectType() != GOVERNANCE_OBJECT_TRIGGER) {
log.debug("CSuperblock Constructor pHoObj not a trigger, returning");
throw new SuperblockException("CSuperblock: Governance Object not a trigger");
}
JSONObject obj = pGovObj.getJSONObject();
// FIRST WE GET THE START EPOCH, THE DATE WHICH THE PAYMENT SHALL OCCUR
nEpochStart = obj.getInt("event_block_height");
// NEXT WE GET THE PAYMENT INFORMATION AND RECONSTRUCT THE PAYMENT VECTOR
String strAddresses = obj.getString("payment_addresses");
String strAmounts = obj.getString("payment_amounts");
parsePaymentSchedule(strAddresses, strAmounts);
log.info("gobject--CSuperblock -- nEpochStart = {}, strAddresses = {}, strAmounts = {}, vecPayments.size() = {}",
nEpochStart, strAddresses, strAmounts, vecPayments.size());
log.info("CSuperblock Constructor End");
}
public final int getStatus() {
return nStatus;
}
public final void setStatus(int nStatusIn) {
nStatus = nStatusIn;
}
// IS THIS TRIGGER ALREADY EXECUTED?
public final boolean isExecuted() {
return nStatus == SEEN_OBJECT_EXECUTED;
}
// TELL THE ENGINE WE EXECUTED THIS EVENT
public final void setExecuted() {
nStatus = SEEN_OBJECT_EXECUTED;
}
public final GovernanceObject getGovernanceObject() {
context.governanceManager.lock.lock();
try {
return context.governanceManager.findGovernanceObject(nGovObjHash);
} finally {
context.governanceManager.lock.unlock();
}
}
public final int getBlockStart() {
/* // 12.1 TRIGGER EXECUTION */
/* // NOTE : Is this over complicated? */
/* //int nRet = 0; */
/* int nTipEpoch = 0; */
/* int nTipBlock = chainActive.Tip()->nHeight+1; */
/* // GET TIP EPOCK / BLOCK */
/* // typically it should be more than the current time */
/* int nDiff = nEpochStart - nTipEpoch; */
/* int nBlockDiff = nDiff / (2.6*60); */
/* // calculate predicted block height */
/* int nMod = (nTipBlock + nBlockDiff) % Params().GetConsensus().nSuperblockCycle; */
/* return (nTipBlock + nBlockDiff)-nMod; */
return nEpochStart;
}
public final int countPayments() {
return vecPayments.size();
}
public Coin getPaymentsLimit(int nBlockHeight) {
if (!isValidBlockHeight(nBlockHeight)) {
return Coin.ZERO;
}
// min subsidy for high diff networks and vice versa
int nBits = !params.getId().equals(NetworkParameters.ID_MAINNET) ? (int)Utils.encodeCompactBits(params.getMaxTarget()) : 1;
// some part of all blocks issued during the cycle goes to superblock, see GetBlockSubsidy
Coin nSuperblockPartOfSubsidy = Block.getBlockInflation(params, nBlockHeight - 1, nBits, true);
Coin nPaymentsLimit = nSuperblockPartOfSubsidy.multiply(params.getSuperblockCycle());
log.info("gobject--CSuperblock::GetPaymentsLimit -- Valid superblock height {}, payments max {}", nBlockHeight, nPaymentsLimit);
return nPaymentsLimit;
}
private Coin parsePaymentAmount(String strAmount) throws ParseException {
log.info("ParsePaymentAmount Start: strAmount = " + strAmount);
Coin nAmount = Coin.ZERO;
if (strAmount.length() == 0) {
throw new ParseException("ParsePaymentAmount: Amount is empty", 0);
}
if (strAmount.length() > 20) {
// String is much too long, the functions below impose stricter
// requirements
throw new ParseException("ParsePaymentAmount: Amount string too long", 21);
}
// Make sure the string makes sense as an amount
// Note: No spaces allowed
// Also note: No scientific notation
int pos = Utils.findFirstNotOf(strAmount, "0123456789.", 0);
if (pos != -1) {
throw new ParseException("ParsePaymentAmount: Amount string contains invalid character", pos);
}
pos = strAmount.indexOf(".");
if (pos == 0) {
// JSON doesn't allow values to start with a decimal point
throw new ParseException("ParsePaymentAmount: Invalid amount string, leading decimal point not allowed", pos);
}
// Make sure there's no more than 1 decimal point
if ((pos != -1) && (strAmount.indexOf(".", pos + 1) != -1)) {
throw new ParseException("ParsePaymentAmount: Invalid amount string, too many decimal points", strAmount.lastIndexOf("."));
}
// Note this code is taken from AmountFromValue in rpcserver.cpp
// which is used for parsing the amounts in createrawtransaction.
try {
BtcFormat usFormat = BtcFormat.getSymbolInstance(Locale.US);
nAmount = usFormat.parse(strAmount);
} catch (ParseException x) {
throw new ParseException("ParsePaymentAmount: ParseFixedPoint failed for string: " + strAmount, x.getErrorOffset());
}
if (nAmount.isGreaterThan(params.getMaxMoney())) {
throw new ParseException("ParsePaymentAmount: Invalid amount string, value outside of valid money range", 0);
}
log.info("ParsePaymentAmount Returning true nAmount = " + nAmount);
return nAmount;
}
public void parsePaymentSchedule(String strPaymentAddresses, String strPaymentAmounts) throws SuperblockException {
// SPLIT UP ADDR/AMOUNT STRINGS AND PUT IN VECTORS
ArrayList vecParsed1 = Utils.split(strPaymentAddresses, "\\|");
ArrayList vecParsed2 = Utils.split(strPaymentAmounts, "\\|");
// IF THESE DONT MATCH, SOMETHING IS WRONG
if (vecParsed1.size() != vecParsed2.size()) {
String message = "CSuperblock::ParsePaymentSchedule -- Mismatched payments and amounts";
log.info(message);
throw new SuperblockException(message);
}
if (vecParsed1.size() == 0) {
String message = "CSuperblock::ParsePaymentSchedule -- Error no payments";
log.info(message);
throw new SuperblockException(message);
}
// LOOP THROUGH THE ADDRESSES/AMOUNTS AND CREATE PAYMENTS
/*
ADDRESSES = [ADDR1|2|3|4|5|6]
AMOUNTS = [AMOUNT1|2|3|4|5|6]
*/
log.info("CSuperblock::ParsePaymentSchedule vecParsed1.size() = " + vecParsed1.size());
for (int i = 0; i < (int)vecParsed1.size(); i++) {
Address address = null;
Coin nAmount = Coin.ZERO;
try {
address = Address.fromBase58(params, vecParsed1.get(i));
} catch (AddressFormatException x) {
String message = "CSuperblock::ParsePaymentSchedule -- Invalid Dash Address : " + vecParsed1.get(i);
log.info(message);
throw new SuperblockException(message);
}
try {
log.info("CSuperblock::ParsePaymentSchedule i = " + i + ", vecParsed2[i] = " + vecParsed2.get(i));
nAmount = parsePaymentAmount(vecParsed2.get(i));
log.info("CSuperblock::ParsePaymentSchedule: amount string = " + vecParsed2.get(i) + ", nAmount = " + nAmount);
} catch (ParseException x) {
throw new SuperblockException(x.getMessage());
}
GovernancePayment payment = new GovernancePayment(address, nAmount);
if (payment.isValid()) {
vecPayments.add(payment);
} else {
vecPayments.clear();
String message = "CSuperblock::ParsePaymentSchedule -- Invalid payment found: address = " + address + ", amount = " + nAmount;
log.info(message);
throw new SuperblockException(message);
}
}
}
GovernancePayment getPayment(int nPaymentIndex)
{
if((nPaymentIndex<0) || (nPaymentIndex >= (int)vecPayments.size())) {
return null;
}
return vecPayments.get(nPaymentIndex);
}
Coin getPaymentsTotalAmount()
{
Coin nPaymentsTotalAmount = Coin.ZERO;
int nPayments = countPayments();
for(int i = 0; i < nPayments; i++) {
nPaymentsTotalAmount = nPaymentsTotalAmount.add(vecPayments.get(i).nAmount);
}
return nPaymentsTotalAmount;
}
public boolean isValidBlockHeight(int nBlockHeight)
{
// SUPERBLOCKS CAN HAPPEN ONLY after hardfork and only ONCE PER CYCLE
return nBlockHeight >= params.getSuperblockStartBlock() &&
((nBlockHeight % params.getSuperblockCycle()) == 0);
}
public static boolean isValidBlockHeight(NetworkParameters params, int nBlockHeight)
{
// SUPERBLOCKS CAN HAPPEN ONLY after hardfork and only ONCE PER CYCLE
return nBlockHeight >= params.getSuperblockStartBlock() &&
((nBlockHeight % params.getSuperblockCycle()) == 0);
}
public static boolean isValidBudgetBlockHeight(NetworkParameters params, int blockHeight) {
if(blockHeight < params.getBudgetPaymentsStartBlock())
return false;
if(blockHeight < params.getSuperblockStartBlock()) {
//use 12.0 budge system rules
int offset = blockHeight % params.getBudgetPaymentsCycleBlocks();
if(blockHeight >= params.getBudgetPaymentsStartBlock() &&
offset < params.getBudgetPaymentsWindowBlocks())
return true;
else return false;
} else {
//use Superblock rules
return isValidBlockHeight(params, blockHeight);
}
}
public boolean isValid(Transaction txNew, int nBlockHeight, Coin blockReward) {
// TODO : LOCK(cs);
// No reason for a lock here now since this method only accesses data
// internal to *this and since CSuperblock's are accessed only through
// shared pointers there's no way our object can get deleted while this
// code is running.
if (!isValidBlockHeight(nBlockHeight)) {
log.info("CSuperblock::IsValid -- ERROR: Block invalid, incorrect block height");
return false;
}
String strPayeesPossible = "";
// CONFIGURE SUPERBLOCK OUTPUTS
int nOutputs = txNew.getOutputs().size();
int nPayments = countPayments();
int nMinerPayments = nOutputs - nPayments;
log.info("gobject--CSuperblock::IsValid nOutputs = {}, nPayments = {}, strData = {}", nOutputs, nPayments, getGovernanceObject().getDataAsHexString());
// We require an exact match (including order) between the expected
// superblock payments and the payments actually in the block.
if (nMinerPayments < 0) {
// This means the block cannot have all the superblock payments
// so it is not valid.
// TODO: could that be that we just hit coinbase size limit?
log.info("CSuperblock::IsValid -- ERROR: Block invalid, too few superblock payments");
return false;
}
// payments should not exceed limit
Coin nPaymentsTotalAmount = getPaymentsTotalAmount();
Coin nPaymentsLimit = getPaymentsLimit(nBlockHeight);
if (nPaymentsTotalAmount.compareTo(nPaymentsLimit) > 0) {
log.info("CSuperblock::IsValid -- ERROR: Block invalid, payments limit exceeded: payments {}, limit {}", nPaymentsTotalAmount, nPaymentsLimit);
return false;
}
// miner should not get more than he would usually get
Coin nBlockValue = txNew.getOutputSum();
if (nBlockValue.compareTo(blockReward.add(nPaymentsTotalAmount)) > 0) {
log.info("CSuperblock::IsValid -- ERROR: Block invalid, block value limit exceeded: block {}, limit {}", nBlockValue, blockReward.add(nPaymentsTotalAmount));
return false;
}
int nVoutIndex = 0;
for (int i = 0; i < nPayments; i++) {
GovernancePayment payment = getPayment(i);
if (payment == null) {
// This shouldn't happen so log a warning
log.info("CSuperblock::IsValid -- WARNING: Failed to find payment: {} of {} total payments", i, nPayments);
continue;
}
boolean fPaymentMatch = false;
for (int j = nVoutIndex; j < nOutputs; j++) {
// Find superblock payment
fPaymentMatch = ((payment.script == txNew.getOutput(j).getScriptPubKey()) && (payment.nAmount.equals(txNew.getOutput(j).getValue())));
if (fPaymentMatch) {
nVoutIndex = j;
break;
}
}
if (!fPaymentMatch) {
// Superblock payment not found!
Address address = payment.script.getToAddress(params);
log.info("CSuperblock::IsValid -- ERROR: Block invalid: {} payment {} to {} not found", i, payment.nAmount, address.toString());
return false;
}
}
return true;
}
}
