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Remove DogecoinACCTv2 as it is no longer being used, and is unsafe.

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CalDescent 2022-09-09 17:12:44 +01:00
parent 5807d6e0dc
commit 667530e202
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src/main/java/org/qortal/controller/tradebot/DogecoinACCTv2TradeBot.java
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@ -1,884 +0,0 @@
package org.qortal.controller.tradebot;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.bitcoinj.core.*;
import org.bitcoinj.script.Script.ScriptType;
import org.qortal.account.PrivateKeyAccount;
import org.qortal.account.PublicKeyAccount;
import org.qortal.api.model.crosschain.TradeBotCreateRequest;
import org.qortal.asset.Asset;
import org.qortal.crosschain.*;
import org.qortal.crypto.Crypto;
import org.qortal.data.at.ATData;
import org.qortal.data.crosschain.CrossChainTradeData;
import org.qortal.data.crosschain.TradeBotData;
import org.qortal.data.transaction.BaseTransactionData;
import org.qortal.data.transaction.DeployAtTransactionData;
import org.qortal.data.transaction.MessageTransactionData;
import org.qortal.group.Group;
import org.qortal.repository.DataException;
import org.qortal.repository.Repository;
import org.qortal.transaction.DeployAtTransaction;
import org.qortal.transaction.MessageTransaction;
import org.qortal.transaction.Transaction.ValidationResult;
import org.qortal.transform.TransformationException;
import org.qortal.transform.transaction.DeployAtTransactionTransformer;
import org.qortal.utils.Base58;
import org.qortal.utils.NTP;
import java.util.Arrays;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;
import static java.util.Arrays.stream;
import static java.util.stream.Collectors.toMap;
/**
* Performing cross-chain trading steps on behalf of user.
* <p>
* We deal with three different independent state-spaces here:
* <ul>
* <li>Qortal blockchain</li>
* <li>Foreign blockchain</li>
* <li>Trade-bot entries</li>
* </ul>
*/
public class DogecoinACCTv2TradeBot implements AcctTradeBot {
private static final Logger LOGGER = LogManager.getLogger(DogecoinACCTv2TradeBot.class);
public enum State implements TradeBot.StateNameAndValueSupplier {
BOB_WAITING_FOR_AT_CONFIRM(10, false, false),
BOB_WAITING_FOR_MESSAGE(15, true, true),
BOB_WAITING_FOR_AT_REDEEM(25, true, true),
BOB_DONE(30, false, false),
BOB_REFUNDED(35, false, false),
ALICE_WAITING_FOR_AT_LOCK(85, true, true),
ALICE_DONE(95, false, false),
ALICE_REFUNDING_A(105, true, true),
ALICE_REFUNDED(110, false, false);
private static final Map<Integer, State> map = stream(State.values()).collect(toMap(state -> state.value, state -> state));
public final int value;
public final boolean requiresAtData;
public final boolean requiresTradeData;
State(int value, boolean requiresAtData, boolean requiresTradeData) {
this.value = value;
this.requiresAtData = requiresAtData;
this.requiresTradeData = requiresTradeData;
}
public static State valueOf(int value) {
return map.get(value);
}
@Override
public String getState() {
return this.name();
}
@Override
public int getStateValue() {
return this.value;
}
}
/** Maximum time Bob waits for his AT creation transaction to be confirmed into a block. (milliseconds) */
private static final long MAX_AT_CONFIRMATION_PERIOD = 24 * 60 * 60 * 1000L; // ms
private static DogecoinACCTv2TradeBot instance;
private final List<String> endStates = Arrays.asList(State.BOB_DONE, State.BOB_REFUNDED, State.ALICE_DONE, State.ALICE_REFUNDING_A, State.ALICE_REFUNDED).stream()
.map(State::name)
.collect(Collectors.toUnmodifiableList());
private DogecoinACCTv2TradeBot() {
}
public static synchronized DogecoinACCTv2TradeBot getInstance() {
if (instance == null)
instance = new DogecoinACCTv2TradeBot();
return instance;
}
@Override
public List<String> getEndStates() {
return this.endStates;
}
/**
* Creates a new trade-bot entry from the "Bob" viewpoint, i.e. OFFERing QORT in exchange for DOGE.
* <p>
* Generates:
* <ul>
* <li>new 'trade' private key</li>
* </ul>
* Derives:
* <ul>
* <li>'native' (as in Qortal) public key, public key hash, address (starting with Q)</li>
* <li>'foreign' (as in Dogecoin) public key, public key hash</li>
* </ul>
* A Qortal AT is then constructed including the following as constants in the 'data segment':
* <ul>
* <li>'native'/Qortal 'trade' address - used as a MESSAGE contact</li>
* <li>'foreign'/Dogecoin public key hash - used by Alice's P2SH scripts to allow redeem</li>
* <li>QORT amount on offer by Bob</li>
* <li>DOGE amount expected in return by Bob (from Alice)</li>
* <li>trading timeout, in case things go wrong and everyone needs to refund</li>
* </ul>
* Returns a DEPLOY_AT transaction that needs to be signed and broadcast to the Qortal network.
* <p>
* Trade-bot will wait for Bob's AT to be deployed before taking next step.
* <p>
* @param repository
* @param tradeBotCreateRequest
* @return raw, unsigned DEPLOY_AT transaction
* @throws DataException
*/
public byte[] createTrade(Repository repository, TradeBotCreateRequest tradeBotCreateRequest) throws DataException {
byte[] tradePrivateKey = TradeBot.generateTradePrivateKey();
byte[] tradeNativePublicKey = TradeBot.deriveTradeNativePublicKey(tradePrivateKey);
byte[] tradeNativePublicKeyHash = Crypto.hash160(tradeNativePublicKey);
String tradeNativeAddress = Crypto.toAddress(tradeNativePublicKey);
byte[] tradeForeignPublicKey = TradeBot.deriveTradeForeignPublicKey(tradePrivateKey);
byte[] tradeForeignPublicKeyHash = Crypto.hash160(tradeForeignPublicKey);
// Convert Dogecoin receiving address into public key hash (we only support P2PKH at this time)
Address dogecoinReceivingAddress;
try {
dogecoinReceivingAddress = Address.fromString(Dogecoin.getInstance().getNetworkParameters(), tradeBotCreateRequest.receivingAddress);
} catch (AddressFormatException e) {
throw new DataException("Unsupported Dogecoin receiving address: " + tradeBotCreateRequest.receivingAddress);
}
if (dogecoinReceivingAddress.getOutputScriptType() != ScriptType.P2PKH)
throw new DataException("Unsupported Dogecoin receiving address: " + tradeBotCreateRequest.receivingAddress);
byte[] dogecoinReceivingAccountInfo = dogecoinReceivingAddress.getHash();
PublicKeyAccount creator = new PublicKeyAccount(repository, tradeBotCreateRequest.creatorPublicKey);
// Deploy AT
long timestamp = NTP.getTime();
byte[] reference = creator.getLastReference();
long fee = 0L;
byte[] signature = null;
BaseTransactionData baseTransactionData = new BaseTransactionData(timestamp, Group.NO_GROUP, reference, creator.getPublicKey(), fee, signature);
String name = "QORT/DOGE ACCT";
String description = "QORT/DOGE cross-chain trade";
String aTType = "ACCT";
String tags = "ACCT QORT DOGE";
byte[] creationBytes = DogecoinACCTv2.buildQortalAT(tradeNativeAddress, tradeForeignPublicKeyHash, tradeBotCreateRequest.qortAmount,
tradeBotCreateRequest.foreignAmount, tradeBotCreateRequest.tradeTimeout);
long amount = tradeBotCreateRequest.fundingQortAmount;
DeployAtTransactionData deployAtTransactionData = new DeployAtTransactionData(baseTransactionData, name, description, aTType, tags, creationBytes, amount, Asset.QORT);
DeployAtTransaction deployAtTransaction = new DeployAtTransaction(repository, deployAtTransactionData);
fee = deployAtTransaction.calcRecommendedFee();
deployAtTransactionData.setFee(fee);
DeployAtTransaction.ensureATAddress(deployAtTransactionData);
String atAddress = deployAtTransactionData.getAtAddress();
TradeBotData tradeBotData = new TradeBotData(tradePrivateKey, DogecoinACCTv2.NAME,
State.BOB_WAITING_FOR_AT_CONFIRM.name(), State.BOB_WAITING_FOR_AT_CONFIRM.value,
creator.getAddress(), atAddress, timestamp, tradeBotCreateRequest.qortAmount,
tradeNativePublicKey, tradeNativePublicKeyHash, tradeNativeAddress,
null, null,
SupportedBlockchain.DOGECOIN.name(),
tradeForeignPublicKey, tradeForeignPublicKeyHash,
tradeBotCreateRequest.foreignAmount, null, null, null, dogecoinReceivingAccountInfo);
TradeBot.updateTradeBotState(repository, tradeBotData, () -> String.format("Built AT %s. Waiting for deployment", atAddress));
// Attempt to backup the trade bot data
TradeBot.backupTradeBotData(repository, null);
// Return to user for signing and broadcast as we don't have their Qortal private key
try {
return DeployAtTransactionTransformer.toBytes(deployAtTransactionData);
} catch (TransformationException e) {
throw new DataException("Failed to transform DEPLOY_AT transaction?", e);
}
}
/**
* Creates a trade-bot entry from the 'Alice' viewpoint, i.e. matching DOGE to an existing offer.
* <p>
* Requires a chosen trade offer from Bob, passed by <tt>crossChainTradeData</tt>
* and access to a Dogecoin wallet via <tt>xprv58</tt>.
* <p>
* The <tt>crossChainTradeData</tt> contains the current trade offer state
* as extracted from the AT's data segment.
* <p>
* Access to a funded wallet is via a Dogecoin BIP32 hierarchical deterministic key,
* passed via <tt>xprv58</tt>.
* <b>This key will be stored in your node's database</b>
* to allow trade-bot to create/fund the necessary P2SH transactions!
* However, due to the nature of BIP32 keys, it is possible to give the trade-bot
* only a subset of wallet access (see BIP32 for more details).
* <p>
* As an example, the xprv58 can be extract from a <i>legacy, password-less</i>
* Electrum wallet by going to the console tab and entering:<br>
* <tt>wallet.keystore.xprv</tt><br>
* which should result in a base58 string starting with either 'xprv' (for Dogecoin main-net)
* or 'tprv' for (Dogecoin test-net).
* <p>
* It is envisaged that the value in <tt>xprv58</tt> will actually come from a Qortal-UI-managed wallet.
* <p>
* If sufficient funds are available, <b>this method will actually fund the P2SH-A</b>
* with the Dogecoin amount expected by 'Bob'.
* <p>
* If the Dogecoin transaction is successfully broadcast to the network then
* we also send a MESSAGE to Bob's trade-bot to let them know.
* <p>
* The trade-bot entry is saved to the repository and the cross-chain trading process commences.
* <p>
* @param repository
* @param crossChainTradeData chosen trade OFFER that Alice wants to match
* @param xprv58 funded wallet xprv in base58
* @return true if P2SH-A funding transaction successfully broadcast to Dogecoin network, false otherwise
* @throws DataException
*/
public ResponseResult startResponse(Repository repository, ATData atData, ACCT acct, CrossChainTradeData crossChainTradeData, String xprv58, String receivingAddress) throws DataException {
byte[] tradePrivateKey = TradeBot.generateTradePrivateKey();
byte[] secretA = TradeBot.generateSecret();
byte[] hashOfSecretA = Crypto.hash160(secretA);
byte[] tradeNativePublicKey = TradeBot.deriveTradeNativePublicKey(tradePrivateKey);
byte[] tradeNativePublicKeyHash = Crypto.hash160(tradeNativePublicKey);
String tradeNativeAddress = Crypto.toAddress(tradeNativePublicKey);
byte[] tradeForeignPublicKey = TradeBot.deriveTradeForeignPublicKey(tradePrivateKey);
byte[] tradeForeignPublicKeyHash = Crypto.hash160(tradeForeignPublicKey);
byte[] receivingPublicKeyHash = Base58.decode(receivingAddress); // Actually the whole address, not just PKH
// We need to generate lockTime-A: add tradeTimeout to now
long now = NTP.getTime();
int lockTimeA = crossChainTradeData.tradeTimeout * 60 + (int) (now / 1000L);
TradeBotData tradeBotData = new TradeBotData(tradePrivateKey, DogecoinACCTv2.NAME,
State.ALICE_WAITING_FOR_AT_LOCK.name(), State.ALICE_WAITING_FOR_AT_LOCK.value,
receivingAddress, crossChainTradeData.qortalAtAddress, now, crossChainTradeData.qortAmount,
tradeNativePublicKey, tradeNativePublicKeyHash, tradeNativeAddress,
secretA, hashOfSecretA,
SupportedBlockchain.DOGECOIN.name(),
tradeForeignPublicKey, tradeForeignPublicKeyHash,
crossChainTradeData.expectedForeignAmount, xprv58, null, lockTimeA, receivingPublicKeyHash);
// Attempt to backup the trade bot data
// Include tradeBotData as an additional parameter, since it's not in the repository yet
TradeBot.backupTradeBotData(repository, Arrays.asList(tradeBotData));
// Check we have enough funds via xprv58 to fund P2SH to cover expectedForeignAmount
long p2shFee;
try {
p2shFee = Dogecoin.getInstance().getP2shFee(now);
} catch (ForeignBlockchainException e) {
LOGGER.debug("Couldn't estimate Dogecoin fees?");
return ResponseResult.NETWORK_ISSUE;
}
// Fee for redeem/refund is subtracted from P2SH-A balance.
// Do not include fee for funding transaction as this is covered by buildSpend()
long amountA = crossChainTradeData.expectedForeignAmount + p2shFee /*redeeming/refunding P2SH-A*/;
// P2SH-A to be funded
byte[] redeemScriptBytes = BitcoinyHTLC.buildScript(tradeForeignPublicKeyHash, lockTimeA, crossChainTradeData.creatorForeignPKH, hashOfSecretA);
String p2shAddress = Dogecoin.getInstance().deriveP2shAddress(redeemScriptBytes);
// Build transaction for funding P2SH-A
Transaction p2shFundingTransaction = Dogecoin.getInstance().buildSpend(tradeBotData.getForeignKey(), p2shAddress, amountA);
if (p2shFundingTransaction == null) {
LOGGER.debug("Unable to build P2SH-A funding transaction - lack of funds?");
return ResponseResult.BALANCE_ISSUE;
}
try {
Dogecoin.getInstance().broadcastTransaction(p2shFundingTransaction);
} catch (ForeignBlockchainException e) {
// We couldn't fund P2SH-A at this time
LOGGER.debug("Couldn't broadcast P2SH-A funding transaction?");
return ResponseResult.NETWORK_ISSUE;
}
// Attempt to send MESSAGE to Bob's Qortal trade address
byte[] messageData = DogecoinACCTv2.buildOfferMessage(tradeBotData.getTradeForeignPublicKeyHash(), tradeBotData.getHashOfSecret(), tradeBotData.getLockTimeA());
String messageRecipient = crossChainTradeData.qortalCreatorTradeAddress;
boolean isMessageAlreadySent = repository.getMessageRepository().exists(tradeBotData.getTradeNativePublicKey(), messageRecipient, messageData);
if (!isMessageAlreadySent) {
PrivateKeyAccount sender = new PrivateKeyAccount(repository, tradeBotData.getTradePrivateKey());
MessageTransaction messageTransaction = MessageTransaction.build(repository, sender, Group.NO_GROUP, messageRecipient, messageData, false, false);
messageTransaction.computeNonce();
messageTransaction.sign(sender);
// reset repository state to prevent deadlock
repository.discardChanges();
ValidationResult result = messageTransaction.importAsUnconfirmed();
if (result != ValidationResult.OK) {
LOGGER.warn(() -> String.format("Unable to send MESSAGE to Bob's trade-bot %s: %s", messageRecipient, result.name()));
return ResponseResult.NETWORK_ISSUE;
}
}
TradeBot.updateTradeBotState(repository, tradeBotData, () -> String.format("Funding P2SH-A %s. Messaged Bob. Waiting for AT-lock", p2shAddress));
return ResponseResult.OK;
}
@Override
public boolean canDelete(Repository repository, TradeBotData tradeBotData) throws DataException {
State tradeBotState = State.valueOf(tradeBotData.getStateValue());
if (tradeBotState == null)
return true;
// If the AT doesn't exist then we might as well let the user tidy up
if (!repository.getATRepository().exists(tradeBotData.getAtAddress()))
return true;
switch (tradeBotState) {
case BOB_WAITING_FOR_AT_CONFIRM:
case ALICE_DONE:
case BOB_DONE:
case ALICE_REFUNDED:
case BOB_REFUNDED:
return true;
default:
return false;
}
}
@Override
public void progress(Repository repository, TradeBotData tradeBotData) throws DataException, ForeignBlockchainException {
State tradeBotState = State.valueOf(tradeBotData.getStateValue());
if (tradeBotState == null) {
LOGGER.info(() -> String.format("Trade-bot entry for AT %s has invalid state?", tradeBotData.getAtAddress()));
return;
}
ATData atData = null;
CrossChainTradeData tradeData = null;
if (tradeBotState.requiresAtData) {
// Attempt to fetch AT data
atData = repository.getATRepository().fromATAddress(tradeBotData.getAtAddress());
if (atData == null) {
LOGGER.debug(() -> String.format("Unable to fetch trade AT %s from repository", tradeBotData.getAtAddress()));
return;
}
if (tradeBotState.requiresTradeData) {
tradeData = DogecoinACCTv2.getInstance().populateTradeData(repository, atData);
if (tradeData == null) {
LOGGER.warn(() -> String.format("Unable to fetch ACCT trade data for AT %s from repository", tradeBotData.getAtAddress()));
return;
}
}
}
switch (tradeBotState) {
case BOB_WAITING_FOR_AT_CONFIRM:
handleBobWaitingForAtConfirm(repository, tradeBotData);
break;
case BOB_WAITING_FOR_MESSAGE:
TradeBot.getInstance().updatePresence(repository, tradeBotData, tradeData);
handleBobWaitingForMessage(repository, tradeBotData, atData, tradeData);
break;
case ALICE_WAITING_FOR_AT_LOCK:
TradeBot.getInstance().updatePresence(repository, tradeBotData, tradeData);
handleAliceWaitingForAtLock(repository, tradeBotData, atData, tradeData);
break;
case BOB_WAITING_FOR_AT_REDEEM:
TradeBot.getInstance().updatePresence(repository, tradeBotData, tradeData);
handleBobWaitingForAtRedeem(repository, tradeBotData, atData, tradeData);
break;
case ALICE_DONE:
case BOB_DONE:
break;
case ALICE_REFUNDING_A:
TradeBot.getInstance().updatePresence(repository, tradeBotData, tradeData);
handleAliceRefundingP2shA(repository, tradeBotData, atData, tradeData);
break;
case ALICE_REFUNDED:
case BOB_REFUNDED:
break;
}
}
/**
* Trade-bot is waiting for Bob's AT to deploy.
* <p>
* If AT is deployed, then trade-bot's next step is to wait for MESSAGE from Alice.
*/
private void handleBobWaitingForAtConfirm(Repository repository, TradeBotData tradeBotData) throws DataException {
if (!repository.getATRepository().exists(tradeBotData.getAtAddress())) {
if (NTP.getTime() - tradeBotData.getTimestamp() <= MAX_AT_CONFIRMATION_PERIOD)
return;
// We've waited ages for AT to be confirmed into a block but something has gone awry.
// After this long we assume transaction loss so give up with trade-bot entry too.
tradeBotData.setState(State.BOB_REFUNDED.name());
tradeBotData.setStateValue(State.BOB_REFUNDED.value);
tradeBotData.setTimestamp(NTP.getTime());
// We delete trade-bot entry here instead of saving, hence not using updateTradeBotState()
repository.getCrossChainRepository().delete(tradeBotData.getTradePrivateKey());
repository.saveChanges();
LOGGER.info(() -> String.format("AT %s never confirmed. Giving up on trade", tradeBotData.getAtAddress()));
TradeBot.notifyStateChange(tradeBotData);
return;
}
TradeBot.updateTradeBotState(repository, tradeBotData, State.BOB_WAITING_FOR_MESSAGE,
() -> String.format("AT %s confirmed ready. Waiting for trade message", tradeBotData.getAtAddress()));
}
/**
* Trade-bot is waiting for MESSAGE from Alice's trade-bot, containing Alice's trade info.
* <p>
* It's possible Bob has cancelling his trade offer, receiving an automatic QORT refund,
* in which case trade-bot is done with this specific trade and finalizes on refunded state.
* <p>
* Assuming trade is still on offer, trade-bot checks the contents of MESSAGE from Alice's trade-bot.
* <p>
* Details from Alice are used to derive P2SH-A address and this is checked for funding balance.
* <p>
* Assuming P2SH-A has at least expected Dogecoin balance,
* Bob's trade-bot constructs a zero-fee, PoW MESSAGE to send to Bob's AT with more trade details.
* <p>
* On processing this MESSAGE, Bob's AT should switch into 'TRADE' mode and only trade with Alice.
* <p>
* Trade-bot's next step is to wait for Alice to redeem the AT, which will allow Bob to
* extract secret-A needed to redeem Alice's P2SH.
* @throws ForeignBlockchainException
*/
private void handleBobWaitingForMessage(Repository repository, TradeBotData tradeBotData,
ATData atData, CrossChainTradeData crossChainTradeData) throws DataException, ForeignBlockchainException {
// If AT has finished then Bob likely cancelled his trade offer
if (atData.getIsFinished()) {
TradeBot.updateTradeBotState(repository, tradeBotData, State.BOB_REFUNDED,
() -> String.format("AT %s cancelled - trading aborted", tradeBotData.getAtAddress()));
return;
}
Dogecoin dogecoin = Dogecoin.getInstance();
String address = tradeBotData.getTradeNativeAddress();
List<MessageTransactionData> messageTransactionsData = repository.getMessageRepository().getMessagesByParticipants(null, address, null, null, null);
for (MessageTransactionData messageTransactionData : messageTransactionsData) {
if (messageTransactionData.isText())
continue;
// We're expecting: HASH160(secret-A), Alice's Dogecoin pubkeyhash and lockTime-A
byte[] messageData = messageTransactionData.getData();
DogecoinACCTv2.OfferMessageData offerMessageData = DogecoinACCTv2.extractOfferMessageData(messageData);
if (offerMessageData == null)
continue;
byte[] aliceForeignPublicKeyHash = offerMessageData.partnerDogecoinPKH;
byte[] hashOfSecretA = offerMessageData.hashOfSecretA;
int lockTimeA = (int) offerMessageData.lockTimeA;
long messageTimestamp = messageTransactionData.getTimestamp();
int refundTimeout = DogecoinACCTv2.calcRefundTimeout(messageTimestamp, lockTimeA);
// Determine P2SH-A address and confirm funded
byte[] redeemScriptA = BitcoinyHTLC.buildScript(aliceForeignPublicKeyHash, lockTimeA, tradeBotData.getTradeForeignPublicKeyHash(), hashOfSecretA);
String p2shAddressA = dogecoin.deriveP2shAddress(redeemScriptA);
long feeTimestamp = calcFeeTimestamp(lockTimeA, crossChainTradeData.tradeTimeout);
long p2shFee = Dogecoin.getInstance().getP2shFee(feeTimestamp);
final long minimumAmountA = tradeBotData.getForeignAmount() + p2shFee;
BitcoinyHTLC.Status htlcStatusA = BitcoinyHTLC.determineHtlcStatus(dogecoin.getBlockchainProvider(), p2shAddressA, minimumAmountA);
switch (htlcStatusA) {
case UNFUNDED:
case FUNDING_IN_PROGRESS:
// There might be another MESSAGE from someone else with an actually funded P2SH-A...
continue;
case REDEEM_IN_PROGRESS:
case REDEEMED:
// We've already redeemed this?
TradeBot.updateTradeBotState(repository, tradeBotData, State.BOB_DONE,
() -> String.format("P2SH-A %s already spent? Assuming trade complete", p2shAddressA));
return;
case REFUND_IN_PROGRESS:
case REFUNDED:
// This P2SH-A is burnt, but there might be another MESSAGE from someone else with an actually funded P2SH-A...
continue;
case FUNDED:
// Fall-through out of switch...
break;
}
// Good to go - send MESSAGE to AT
String aliceNativeAddress = Crypto.toAddress(messageTransactionData.getCreatorPublicKey());
// Build outgoing message, padding each part to 32 bytes to make it easier for AT to consume
byte[] outgoingMessageData = DogecoinACCTv2.buildTradeMessage(aliceNativeAddress, aliceForeignPublicKeyHash, hashOfSecretA, lockTimeA, refundTimeout);
String messageRecipient = tradeBotData.getAtAddress();
boolean isMessageAlreadySent = repository.getMessageRepository().exists(tradeBotData.getTradeNativePublicKey(), messageRecipient, outgoingMessageData);
if (!isMessageAlreadySent) {
PrivateKeyAccount sender = new PrivateKeyAccount(repository, tradeBotData.getTradePrivateKey());
MessageTransaction outgoingMessageTransaction = MessageTransaction.build(repository, sender, Group.NO_GROUP, messageRecipient, outgoingMessageData, false, false);
outgoingMessageTransaction.computeNonce();
outgoingMessageTransaction.sign(sender);
// reset repository state to prevent deadlock
repository.discardChanges();
ValidationResult result = outgoingMessageTransaction.importAsUnconfirmed();
if (result != ValidationResult.OK) {
LOGGER.warn(() -> String.format("Unable to send MESSAGE to AT %s: %s", messageRecipient, result.name()));
return;
}
}
TradeBot.updateTradeBotState(repository, tradeBotData, State.BOB_WAITING_FOR_AT_REDEEM,
() -> String.format("Locked AT %s to %s. Waiting for AT redeem", tradeBotData.getAtAddress(), aliceNativeAddress));
return;
}
}
/**
* Trade-bot is waiting for Bob's AT to switch to TRADE mode and lock trade to Alice only.
* <p>
* It's possible that Bob has cancelled his trade offer in the mean time, or that somehow
* this process has taken so long that we've reached P2SH-A's locktime, or that someone else
* has managed to trade with Bob. In any of these cases, trade-bot switches to begin the refunding process.
* <p>
* Assuming Bob's AT is locked to Alice, trade-bot checks AT's state data to make sure it is correct.
* <p>
* If all is well, trade-bot then redeems AT using Alice's secret-A, releasing Bob's QORT to Alice.
* <p>
* In revealing a valid secret-A, Bob can then redeem the DOGE funds from P2SH-A.
* <p>
* @throws ForeignBlockchainException
*/
private void handleAliceWaitingForAtLock(Repository repository, TradeBotData tradeBotData,
ATData atData, CrossChainTradeData crossChainTradeData) throws DataException, ForeignBlockchainException {
if (aliceUnexpectedState(repository, tradeBotData, atData, crossChainTradeData))
return;
Dogecoin dogecoin = Dogecoin.getInstance();
int lockTimeA = tradeBotData.getLockTimeA();
// Refund P2SH-A if we've passed lockTime-A
if (NTP.getTime() >= lockTimeA * 1000L) {
byte[] redeemScriptA = BitcoinyHTLC.buildScript(tradeBotData.getTradeForeignPublicKeyHash(), lockTimeA, crossChainTradeData.creatorForeignPKH, tradeBotData.getHashOfSecret());
String p2shAddressA = dogecoin.deriveP2shAddress(redeemScriptA);
long feeTimestamp = calcFeeTimestamp(lockTimeA, crossChainTradeData.tradeTimeout);
long p2shFee = Dogecoin.getInstance().getP2shFee(feeTimestamp);
long minimumAmountA = crossChainTradeData.expectedForeignAmount + p2shFee;
BitcoinyHTLC.Status htlcStatusA = BitcoinyHTLC.determineHtlcStatus(dogecoin.getBlockchainProvider(), p2shAddressA, minimumAmountA);
switch (htlcStatusA) {
case UNFUNDED:
case FUNDING_IN_PROGRESS:
case FUNDED:
break;
case REDEEM_IN_PROGRESS:
case REDEEMED:
// Already redeemed?
TradeBot.updateTradeBotState(repository, tradeBotData, State.ALICE_DONE,
() -> String.format("P2SH-A %s already spent? Assuming trade completed", p2shAddressA));
return;
case REFUND_IN_PROGRESS:
case REFUNDED:
TradeBot.updateTradeBotState(repository, tradeBotData, State.ALICE_REFUNDED,
() -> String.format("P2SH-A %s already refunded. Trade aborted", p2shAddressA));
return;
}
TradeBot.updateTradeBotState(repository, tradeBotData, State.ALICE_REFUNDING_A,
() -> atData.getIsFinished()
? String.format("AT %s cancelled. Refunding P2SH-A %s - aborting trade", tradeBotData.getAtAddress(), p2shAddressA)
: String.format("LockTime-A reached, refunding P2SH-A %s - aborting trade", p2shAddressA));
return;
}
// We're waiting for AT to be in TRADE mode
if (crossChainTradeData.mode != AcctMode.TRADING)
return;
// AT is in TRADE mode and locked to us as checked by aliceUnexpectedState() above
// Find our MESSAGE to AT from previous state
List<MessageTransactionData> messageTransactionsData = repository.getMessageRepository().getMessagesByParticipants(tradeBotData.getTradeNativePublicKey(),
crossChainTradeData.qortalCreatorTradeAddress, null, null, null);
if (messageTransactionsData == null || messageTransactionsData.isEmpty()) {
LOGGER.warn(() -> String.format("Unable to find our message to trade creator %s?", crossChainTradeData.qortalCreatorTradeAddress));
return;
}
long recipientMessageTimestamp = messageTransactionsData.get(0).getTimestamp();
int refundTimeout = DogecoinACCTv2.calcRefundTimeout(recipientMessageTimestamp, lockTimeA);
// Our calculated refundTimeout should match AT's refundTimeout
if (refundTimeout != crossChainTradeData.refundTimeout) {
LOGGER.debug(() -> String.format("Trade AT refundTimeout '%d' doesn't match our refundTimeout '%d'", crossChainTradeData.refundTimeout, refundTimeout));
// We'll eventually refund
return;
}
// We're good to redeem AT
// Send 'redeem' MESSAGE to AT using both secret
byte[] secretA = tradeBotData.getSecret();
String qortalReceivingAddress = Base58.encode(tradeBotData.getReceivingAccountInfo()); // Actually contains whole address, not just PKH
byte[] messageData = DogecoinACCTv2.buildRedeemMessage(secretA, qortalReceivingAddress);
String messageRecipient = tradeBotData.getAtAddress();
boolean isMessageAlreadySent = repository.getMessageRepository().exists(tradeBotData.getTradeNativePublicKey(), messageRecipient, messageData);
if (!isMessageAlreadySent) {
PrivateKeyAccount sender = new PrivateKeyAccount(repository, tradeBotData.getTradePrivateKey());
MessageTransaction messageTransaction = MessageTransaction.build(repository, sender, Group.NO_GROUP, messageRecipient, messageData, false, false);
messageTransaction.computeNonce();
messageTransaction.sign(sender);
// Reset repository state to prevent deadlock
repository.discardChanges();
ValidationResult result = messageTransaction.importAsUnconfirmed();
if (result != ValidationResult.OK) {
LOGGER.warn(() -> String.format("Unable to send MESSAGE to AT %s: %s", messageRecipient, result.name()));
return;
}
}
TradeBot.updateTradeBotState(repository, tradeBotData, State.ALICE_DONE,
() -> String.format("Redeeming AT %s. Funds should arrive at %s",
tradeBotData.getAtAddress(), qortalReceivingAddress));
}
/**
* Trade-bot is waiting for Alice to redeem Bob's AT, thus revealing secret-A which is required to spend the DOGE funds from P2SH-A.
* <p>
* It's possible that Bob's AT has reached its trading timeout and automatically refunded QORT back to Bob. In which case,
* trade-bot is done with this specific trade and finalizes in refunded state.
* <p>
* Assuming trade-bot can extract a valid secret-A from Alice's MESSAGE then trade-bot uses that to redeem the DOGE funds from P2SH-A
* to Bob's 'foreign'/Dogecoin trade legacy-format address, as derived from trade private key.
* <p>
* (This could potentially be 'improved' to send DOGE to any address of Bob's choosing by changing the transaction output).
* <p>
* If trade-bot successfully broadcasts the transaction, then this specific trade is done.
* @throws ForeignBlockchainException
*/
private void handleBobWaitingForAtRedeem(Repository repository, TradeBotData tradeBotData,
ATData atData, CrossChainTradeData crossChainTradeData) throws DataException, ForeignBlockchainException {
// AT should be 'finished' once Alice has redeemed QORT funds
if (!atData.getIsFinished())
// Not finished yet
return;
// If AT is REFUNDED or CANCELLED then something has gone wrong
if (crossChainTradeData.mode == AcctMode.REFUNDED || crossChainTradeData.mode == AcctMode.CANCELLED) {
// Alice hasn't redeemed the QORT, so there is no point in trying to redeem the DOGE
TradeBot.updateTradeBotState(repository, tradeBotData, State.BOB_REFUNDED,
() -> String.format("AT %s has auto-refunded - trade aborted", tradeBotData.getAtAddress()));
return;
}
byte[] secretA = DogecoinACCTv2.getInstance().findSecretA(repository, crossChainTradeData);
if (secretA == null) {
LOGGER.debug(() -> String.format("Unable to find secret-A from redeem message to AT %s?", tradeBotData.getAtAddress()));
return;
}
// Use secret-A to redeem P2SH-A
Dogecoin dogecoin = Dogecoin.getInstance();
byte[] receivingAccountInfo = tradeBotData.getReceivingAccountInfo();
int lockTimeA = crossChainTradeData.lockTimeA;
byte[] redeemScriptA = BitcoinyHTLC.buildScript(crossChainTradeData.partnerForeignPKH, lockTimeA, crossChainTradeData.creatorForeignPKH, crossChainTradeData.hashOfSecretA);
String p2shAddressA = dogecoin.deriveP2shAddress(redeemScriptA);
// Fee for redeem/refund is subtracted from P2SH-A balance.
long feeTimestamp = calcFeeTimestamp(lockTimeA, crossChainTradeData.tradeTimeout);
long p2shFee = Dogecoin.getInstance().getP2shFee(feeTimestamp);
long minimumAmountA = crossChainTradeData.expectedForeignAmount + p2shFee;
BitcoinyHTLC.Status htlcStatusA = BitcoinyHTLC.determineHtlcStatus(dogecoin.getBlockchainProvider(), p2shAddressA, minimumAmountA);
switch (htlcStatusA) {
case UNFUNDED:
case FUNDING_IN_PROGRESS:
// P2SH-A suddenly not funded? Our best bet at this point is to hope for AT auto-refund
return;
case REDEEM_IN_PROGRESS:
case REDEEMED:
// Double-check that we have redeemed P2SH-A...
break;
case REFUND_IN_PROGRESS:
case REFUNDED:
// Wait for AT to auto-refund
return;
case FUNDED: {
Coin redeemAmount = Coin.valueOf(crossChainTradeData.expectedForeignAmount);
ECKey redeemKey = ECKey.fromPrivate(tradeBotData.getTradePrivateKey());
List<TransactionOutput> fundingOutputs = dogecoin.getUnspentOutputs(p2shAddressA);
Transaction p2shRedeemTransaction = BitcoinyHTLC.buildRedeemTransaction(dogecoin.getNetworkParameters(), redeemAmount, redeemKey,
fundingOutputs, redeemScriptA, secretA, receivingAccountInfo);
dogecoin.broadcastTransaction(p2shRedeemTransaction);
break;
}
}
String receivingAddress = dogecoin.pkhToAddress(receivingAccountInfo);
TradeBot.updateTradeBotState(repository, tradeBotData, State.BOB_DONE,
() -> String.format("P2SH-A %s redeemed. Funds should arrive at %s", tradeBotData.getAtAddress(), receivingAddress));
}
/**
* Trade-bot is attempting to refund P2SH-A.
* @throws ForeignBlockchainException
*/
private void handleAliceRefundingP2shA(Repository repository, TradeBotData tradeBotData,
ATData atData, CrossChainTradeData crossChainTradeData) throws DataException, ForeignBlockchainException {
int lockTimeA = tradeBotData.getLockTimeA();
// We can't refund P2SH-A until lockTime-A has passed
if (NTP.getTime() <= lockTimeA * 1000L)
return;
Dogecoin dogecoin = Dogecoin.getInstance();
// We can't refund P2SH-A until median block time has passed lockTime-A (see BIP113)
int medianBlockTime = dogecoin.getMedianBlockTime();
if (medianBlockTime <= lockTimeA)
return;
byte[] redeemScriptA = BitcoinyHTLC.buildScript(tradeBotData.getTradeForeignPublicKeyHash(), lockTimeA, crossChainTradeData.creatorForeignPKH, tradeBotData.getHashOfSecret());
String p2shAddressA = dogecoin.deriveP2shAddress(redeemScriptA);
// Fee for redeem/refund is subtracted from P2SH-A balance.
long feeTimestamp = calcFeeTimestamp(lockTimeA, crossChainTradeData.tradeTimeout);
long p2shFee = Dogecoin.getInstance().getP2shFee(feeTimestamp);
long minimumAmountA = crossChainTradeData.expectedForeignAmount + p2shFee;
BitcoinyHTLC.Status htlcStatusA = BitcoinyHTLC.determineHtlcStatus(dogecoin.getBlockchainProvider(), p2shAddressA, minimumAmountA);
switch (htlcStatusA) {
case UNFUNDED:
case FUNDING_IN_PROGRESS:
// Still waiting for P2SH-A to be funded...
return;
case REDEEM_IN_PROGRESS:
case REDEEMED:
// Too late!
TradeBot.updateTradeBotState(repository, tradeBotData, State.ALICE_DONE,
() -> String.format("P2SH-A %s already spent!", p2shAddressA));
return;
case REFUND_IN_PROGRESS:
case REFUNDED:
break;
case FUNDED:{
Coin refundAmount = Coin.valueOf(crossChainTradeData.expectedForeignAmount);
ECKey refundKey = ECKey.fromPrivate(tradeBotData.getTradePrivateKey());
List<TransactionOutput> fundingOutputs = dogecoin.getUnspentOutputs(p2shAddressA);
// Determine receive address for refund
String receiveAddress = dogecoin.getUnusedReceiveAddress(tradeBotData.getForeignKey());
Address receiving = Address.fromString(dogecoin.getNetworkParameters(), receiveAddress);
Transaction p2shRefundTransaction = BitcoinyHTLC.buildRefundTransaction(dogecoin.getNetworkParameters(), refundAmount, refundKey,
fundingOutputs, redeemScriptA, lockTimeA, receiving.getHash());
dogecoin.broadcastTransaction(p2shRefundTransaction);
break;
}
}
TradeBot.updateTradeBotState(repository, tradeBotData, State.ALICE_REFUNDED,
() -> String.format("LockTime-A reached. Refunded P2SH-A %s. Trade aborted", p2shAddressA));
}
/**
* Returns true if Alice finds AT unexpectedly cancelled, refunded, redeemed or locked to someone else.
* <p>
* Will automatically update trade-bot state to <tt>ALICE_REFUNDING_A</tt> or <tt>ALICE_DONE</tt> as necessary.
*
* @throws DataException
* @throws ForeignBlockchainException
*/
private boolean aliceUnexpectedState(Repository repository, TradeBotData tradeBotData,
ATData atData, CrossChainTradeData crossChainTradeData) throws DataException, ForeignBlockchainException {
// This is OK
if (!atData.getIsFinished() && crossChainTradeData.mode == AcctMode.OFFERING)
return false;
boolean isAtLockedToUs = tradeBotData.getTradeNativeAddress().equals(crossChainTradeData.qortalPartnerAddress);
if (!atData.getIsFinished() && crossChainTradeData.mode == AcctMode.TRADING)
if (isAtLockedToUs) {
// AT is trading with us - OK
return false;
} else {
TradeBot.updateTradeBotState(repository, tradeBotData, State.ALICE_REFUNDING_A,
() -> String.format("AT %s trading with someone else: %s. Refunding & aborting trade", tradeBotData.getAtAddress(), crossChainTradeData.qortalPartnerAddress));
return true;
}
if (atData.getIsFinished() && crossChainTradeData.mode == AcctMode.REDEEMED && isAtLockedToUs) {
// We've redeemed already?
TradeBot.updateTradeBotState(repository, tradeBotData, State.ALICE_DONE,
() -> String.format("AT %s already redeemed by us. Trade completed", tradeBotData.getAtAddress()));
} else {
// Any other state is not good, so start defensive refund
TradeBot.updateTradeBotState(repository, tradeBotData, State.ALICE_REFUNDING_A,
() -> String.format("AT %s cancelled/refunded/redeemed by someone else/invalid state. Refunding & aborting trade", tradeBotData.getAtAddress()));
}
return true;
}
private long calcFeeTimestamp(int lockTimeA, int tradeTimeout) {
return (lockTimeA - tradeTimeout * 60) * 1000L;
}
}

1
src/main/java/org/qortal/controller/tradebot/TradeBot.java
View File

@ -99,7 +99,6 @@ public class TradeBot implements Listener {
acctTradeBotSuppliers.put(LitecoinACCTv2.class, LitecoinACCTv2TradeBot::getInstance); acctTradeBotSuppliers.put(LitecoinACCTv2.class, LitecoinACCTv2TradeBot::getInstance);
acctTradeBotSuppliers.put(LitecoinACCTv3.class, LitecoinACCTv3TradeBot::getInstance); acctTradeBotSuppliers.put(LitecoinACCTv3.class, LitecoinACCTv3TradeBot::getInstance);
acctTradeBotSuppliers.put(DogecoinACCTv1.class, DogecoinACCTv1TradeBot::getInstance); acctTradeBotSuppliers.put(DogecoinACCTv1.class, DogecoinACCTv1TradeBot::getInstance);
acctTradeBotSuppliers.put(DogecoinACCTv2.class, DogecoinACCTv2TradeBot::getInstance);
acctTradeBotSuppliers.put(DogecoinACCTv3.class, DogecoinACCTv3TradeBot::getInstance); acctTradeBotSuppliers.put(DogecoinACCTv3.class, DogecoinACCTv3TradeBot::getInstance);
acctTradeBotSuppliers.put(DigibyteACCTv3.class, DigibyteACCTv3TradeBot::getInstance); acctTradeBotSuppliers.put(DigibyteACCTv3.class, DigibyteACCTv3TradeBot::getInstance);
acctTradeBotSuppliers.put(RavencoinACCTv3.class, RavencoinACCTv3TradeBot::getInstance); acctTradeBotSuppliers.put(RavencoinACCTv3.class, RavencoinACCTv3TradeBot::getInstance);

861
src/main/java/org/qortal/crosschain/DogecoinACCTv2.java
View File

@ -1,861 +0,0 @@
package org.qortal.crosschain;
import com.google.common.hash.HashCode;
import com.google.common.primitives.Bytes;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.ciyam.at.*;
import org.qortal.account.Account;
import org.qortal.asset.Asset;
import org.qortal.at.QortalFunctionCode;
import org.qortal.crypto.Crypto;
import org.qortal.data.at.ATData;
import org.qortal.data.at.ATStateData;
import org.qortal.data.crosschain.CrossChainTradeData;
import org.qortal.data.transaction.MessageTransactionData;
import org.qortal.repository.DataException;
import org.qortal.repository.Repository;
import org.qortal.utils.Base58;
import org.qortal.utils.BitTwiddling;
import java.nio.ByteBuffer;
import java.util.Arrays;
import java.util.List;
import static org.ciyam.at.OpCode.calcOffset;
/**
* Cross-chain trade AT
*
* <p>
* <ul>
* <li>Bob generates Dogecoin & Qortal 'trade' keys
* <ul>
* <li>private key required to sign P2SH redeem tx</li>
* <li>private key could be used to create 'secret' (e.g. double-SHA256)</li>
* <li>encrypted private key could be stored in Qortal AT for access by Bob from any node</li>
* </ul>
* </li>
* <li>Bob deploys Qortal AT
* <ul>
* </ul>
* </li>
* <li>Alice finds Qortal AT and wants to trade
* <ul>
* <li>Alice generates Dogecoin & Qortal 'trade' keys</li>
* <li>Alice funds Dogecoin P2SH-A</li>
* <li>Alice sends 'offer' MESSAGE to Bob from her Qortal trade address, containing:
* <ul>
* <li>hash-of-secret-A</li>
* <li>her 'trade' Dogecoin PKH</li>
* </ul>
* </li>
* </ul>
* </li>
* <li>Bob receives "offer" MESSAGE
* <ul>
* <li>Checks Alice's P2SH-A</li>
* <li>Sends 'trade' MESSAGE to Qortal AT from his trade address, containing:
* <ul>
* <li>Alice's trade Qortal address</li>
* <li>Alice's trade Dogecoin PKH</li>
* <li>hash-of-secret-A</li>
* </ul>
* </li>
* </ul>
* </li>
* <li>Alice checks Qortal AT to confirm it's locked to her
* <ul>
* <li>Alice sends 'redeem' MESSAGE to Qortal AT from her trade address, containing:
* <ul>
* <li>secret-A</li>
* <li>Qortal receiving address of her chosing</li>
* </ul>
* </li>
* <li>AT's QORT funds are sent to Qortal receiving address</li>
* </ul>
* </li>
* <li>Bob checks AT, extracts secret-A
* <ul>
* <li>Bob redeems P2SH-A using his Dogecoin trade key and secret-A</li>
* <li>P2SH-A DOGE funds end up at Dogecoin address determined by redeem transaction output(s)</li>
* </ul>
* </li>
* </ul>
*/
public class DogecoinACCTv2 implements ACCT {
private static final Logger LOGGER = LogManager.getLogger(DogecoinACCTv2.class);
public static final String NAME = DogecoinACCTv2.class.getSimpleName();
public static final byte[] CODE_BYTES_HASH = HashCode.fromString("6fff38d6eeb06568a9c879c5628527730319844aa0de53f5f4ffab5506efe885").asBytes(); // SHA256 of AT code bytes
public static final int SECRET_LENGTH = 32;
/** <b>Value</b> offset into AT segment where 'mode' variable (long) is stored. (Multiply by MachineState.VALUE_SIZE for byte offset). */
private static final int MODE_VALUE_OFFSET = 61;
/** <b>Byte</b> offset into AT state data where 'mode' variable (long) is stored. */
public static final int MODE_BYTE_OFFSET = MachineState.HEADER_LENGTH + (MODE_VALUE_OFFSET * MachineState.VALUE_SIZE);
public static class OfferMessageData {
public byte[] partnerDogecoinPKH;
public byte[] hashOfSecretA;
public long lockTimeA;
}
public static final int OFFER_MESSAGE_LENGTH = 20 /*partnerDogecoinPKH*/ + 20 /*hashOfSecretA*/ + 8 /*lockTimeA*/;
public static final int TRADE_MESSAGE_LENGTH = 32 /*partner's Qortal trade address (padded from 25 to 32)*/
+ 24 /*partner's Dogecoin PKH (padded from 20 to 24)*/
+ 8 /*AT trade timeout (minutes)*/
+ 24 /*hash of secret-A (padded from 20 to 24)*/
+ 8 /*lockTimeA*/;
public static final int REDEEM_MESSAGE_LENGTH = 32 /*secret-A*/ + 32 /*partner's Qortal receiving address padded from 25 to 32*/;
public static final int CANCEL_MESSAGE_LENGTH = 32 /*AT creator's Qortal address*/;
private static DogecoinACCTv2 instance;
private DogecoinACCTv2() {
}
public static synchronized DogecoinACCTv2 getInstance() {
if (instance == null)
instance = new DogecoinACCTv2();
return instance;
}
@Override
public byte[] getCodeBytesHash() {
return CODE_BYTES_HASH;
}
@Override
public int getModeByteOffset() {
return MODE_BYTE_OFFSET;
}
@Override
public ForeignBlockchain getBlockchain() {
return Dogecoin.getInstance();
}
/**
* Returns Qortal AT creation bytes for cross-chain trading AT.
* <p>
* <tt>tradeTimeout</tt> (minutes) is the time window for the trade partner to send the
* 32-byte secret to the AT, before the AT automatically refunds the AT's creator.
*
* @param creatorTradeAddress AT creator's trade Qortal address
* @param dogecoinPublicKeyHash 20-byte HASH160 of creator's trade Dogecoin public key
* @param qortAmount how much QORT to pay trade partner if they send correct 32-byte secrets to AT
* @param dogecoinAmount how much DOGE the AT creator is expecting to trade
* @param tradeTimeout suggested timeout for entire trade
*/
public static byte[] buildQortalAT(String creatorTradeAddress, byte[] dogecoinPublicKeyHash, long qortAmount, long dogecoinAmount, int tradeTimeout) {
if (dogecoinPublicKeyHash.length != 20)
throw new IllegalArgumentException("Dogecoin public key hash should be 20 bytes");
// Labels for data segment addresses
int addrCounter = 0;
// Constants (with corresponding dataByteBuffer.put*() calls below)
final int addrCreatorTradeAddress1 = addrCounter++;
final int addrCreatorTradeAddress2 = addrCounter++;
final int addrCreatorTradeAddress3 = addrCounter++;
final int addrCreatorTradeAddress4 = addrCounter++;
final int addrDogecoinPublicKeyHash = addrCounter;
addrCounter += 4;
final int addrQortAmount = addrCounter++;
final int addrDogecoinAmount = addrCounter++;
final int addrTradeTimeout = addrCounter++;
final int addrMessageTxnType = addrCounter++;
final int addrExpectedTradeMessageLength = addrCounter++;
final int addrExpectedRedeemMessageLength = addrCounter++;
final int addrCreatorAddressPointer = addrCounter++;
final int addrQortalPartnerAddressPointer = addrCounter++;
final int addrMessageSenderPointer = addrCounter++;
final int addrTradeMessagePartnerDogecoinPKHOffset = addrCounter++;
final int addrPartnerDogecoinPKHPointer = addrCounter++;
final int addrTradeMessageHashOfSecretAOffset = addrCounter++;
final int addrHashOfSecretAPointer = addrCounter++;
final int addrRedeemMessageReceivingAddressOffset = addrCounter++;
final int addrMessageDataPointer = addrCounter++;
final int addrMessageDataLength = addrCounter++;
final int addrPartnerReceivingAddressPointer = addrCounter++;
final int addrEndOfConstants = addrCounter;
// Variables
final int addrCreatorAddress1 = addrCounter++;
final int addrCreatorAddress2 = addrCounter++;
final int addrCreatorAddress3 = addrCounter++;
final int addrCreatorAddress4 = addrCounter++;
final int addrQortalPartnerAddress1 = addrCounter++;
final int addrQortalPartnerAddress2 = addrCounter++;
final int addrQortalPartnerAddress3 = addrCounter++;
final int addrQortalPartnerAddress4 = addrCounter++;
final int addrLockTimeA = addrCounter++;
final int addrRefundTimeout = addrCounter++;
final int addrRefundTimestamp = addrCounter++;
final int addrLastTxnTimestamp = addrCounter++;
final int addrBlockTimestamp = addrCounter++;
final int addrTxnType = addrCounter++;
final int addrResult = addrCounter++;
final int addrMessageSender1 = addrCounter++;
final int addrMessageSender2 = addrCounter++;
final int addrMessageSender3 = addrCounter++;
final int addrMessageSender4 = addrCounter++;
final int addrMessageLength = addrCounter++;
final int addrMessageData = addrCounter;
addrCounter += 4;
final int addrHashOfSecretA = addrCounter;
addrCounter += 4;
final int addrPartnerDogecoinPKH = addrCounter;
addrCounter += 4;
final int addrPartnerReceivingAddress = addrCounter;
addrCounter += 4;
final int addrMode = addrCounter++;
assert addrMode == MODE_VALUE_OFFSET : String.format("addrMode %d does not match MODE_VALUE_OFFSET %d", addrMode, MODE_VALUE_OFFSET);
// Data segment
ByteBuffer dataByteBuffer = ByteBuffer.allocate(addrCounter * MachineState.VALUE_SIZE);
// AT creator's trade Qortal address, decoded from Base58
assert dataByteBuffer.position() == addrCreatorTradeAddress1 * MachineState.VALUE_SIZE : "addrCreatorTradeAddress1 incorrect";
byte[] creatorTradeAddressBytes = Base58.decode(creatorTradeAddress);
dataByteBuffer.put(Bytes.ensureCapacity(creatorTradeAddressBytes, 32, 0));
// Dogecoin public key hash
assert dataByteBuffer.position() == addrDogecoinPublicKeyHash * MachineState.VALUE_SIZE : "addrDogecoinPublicKeyHash incorrect";
dataByteBuffer.put(Bytes.ensureCapacity(dogecoinPublicKeyHash, 32, 0));
// Redeem Qort amount
assert dataByteBuffer.position() == addrQortAmount * MachineState.VALUE_SIZE : "addrQortAmount incorrect";
dataByteBuffer.putLong(qortAmount);
// Expected Dogecoin amount
assert dataByteBuffer.position() == addrDogecoinAmount * MachineState.VALUE_SIZE : "addrDogecoinAmount incorrect";
dataByteBuffer.putLong(dogecoinAmount);
// Suggested trade timeout (minutes)
assert dataByteBuffer.position() == addrTradeTimeout * MachineState.VALUE_SIZE : "addrTradeTimeout incorrect";
dataByteBuffer.putLong(tradeTimeout);
// We're only interested in MESSAGE transactions
assert dataByteBuffer.position() == addrMessageTxnType * MachineState.VALUE_SIZE : "addrMessageTxnType incorrect";
dataByteBuffer.putLong(API.ATTransactionType.MESSAGE.value);
// Expected length of 'trade' MESSAGE data from AT creator
assert dataByteBuffer.position() == addrExpectedTradeMessageLength * MachineState.VALUE_SIZE : "addrExpectedTradeMessageLength incorrect";
dataByteBuffer.putLong(TRADE_MESSAGE_LENGTH);
// Expected length of 'redeem' MESSAGE data from trade partner
assert dataByteBuffer.position() == addrExpectedRedeemMessageLength * MachineState.VALUE_SIZE : "addrExpectedRedeemMessageLength incorrect";
dataByteBuffer.putLong(REDEEM_MESSAGE_LENGTH);
// Index into data segment of AT creator's address, used by GET_B_IND
assert dataByteBuffer.position() == addrCreatorAddressPointer * MachineState.VALUE_SIZE : "addrCreatorAddressPointer incorrect";
dataByteBuffer.putLong(addrCreatorAddress1);
// Index into data segment of partner's Qortal address, used by SET_B_IND
assert dataByteBuffer.position() == addrQortalPartnerAddressPointer * MachineState.VALUE_SIZE : "addrQortalPartnerAddressPointer incorrect";
dataByteBuffer.putLong(addrQortalPartnerAddress1);
// Index into data segment of (temporary) transaction's sender's address, used by GET_B_IND
assert dataByteBuffer.position() == addrMessageSenderPointer * MachineState.VALUE_SIZE : "addrMessageSenderPointer incorrect";
dataByteBuffer.putLong(addrMessageSender1);
// Offset into 'trade' MESSAGE data payload for extracting partner's Dogecoin PKH
assert dataByteBuffer.position() == addrTradeMessagePartnerDogecoinPKHOffset * MachineState.VALUE_SIZE : "addrTradeMessagePartnerDogecoinPKHOffset incorrect";
dataByteBuffer.putLong(32L);
// Index into data segment of partner's Dogecoin PKH, used by GET_B_IND
assert dataByteBuffer.position() == addrPartnerDogecoinPKHPointer * MachineState.VALUE_SIZE : "addrPartnerDogecoinPKHPointer incorrect";
dataByteBuffer.putLong(addrPartnerDogecoinPKH);
// Offset into 'trade' MESSAGE data payload for extracting hash-of-secret-A
assert dataByteBuffer.position() == addrTradeMessageHashOfSecretAOffset * MachineState.VALUE_SIZE : "addrTradeMessageHashOfSecretAOffset incorrect";
dataByteBuffer.putLong(64L);
// Index into data segment to hash of secret A, used by GET_B_IND
assert dataByteBuffer.position() == addrHashOfSecretAPointer * MachineState.VALUE_SIZE : "addrHashOfSecretAPointer incorrect";
dataByteBuffer.putLong(addrHashOfSecretA);
// Offset into 'redeem' MESSAGE data payload for extracting Qortal receiving address
assert dataByteBuffer.position() == addrRedeemMessageReceivingAddressOffset * MachineState.VALUE_SIZE : "addrRedeemMessageReceivingAddressOffset incorrect";
dataByteBuffer.putLong(32L);
// Source location and length for hashing any passed secret
assert dataByteBuffer.position() == addrMessageDataPointer * MachineState.VALUE_SIZE : "addrMessageDataPointer incorrect";
dataByteBuffer.putLong(addrMessageData);
assert dataByteBuffer.position() == addrMessageDataLength * MachineState.VALUE_SIZE : "addrMessageDataLength incorrect";
dataByteBuffer.putLong(32L);
// Pointer into data segment of where to save partner's receiving Qortal address, used by GET_B_IND
assert dataByteBuffer.position() == addrPartnerReceivingAddressPointer * MachineState.VALUE_SIZE : "addrPartnerReceivingAddressPointer incorrect";
dataByteBuffer.putLong(addrPartnerReceivingAddress);
assert dataByteBuffer.position() == addrEndOfConstants * MachineState.VALUE_SIZE : "dataByteBuffer position not at end of constants";
// Code labels
Integer labelRefund = null;
Integer labelTradeTxnLoop = null;
Integer labelCheckTradeTxn = null;
Integer labelCheckCancelTxn = null;
Integer labelNotTradeNorCancelTxn = null;
Integer labelCheckNonRefundTradeTxn = null;
Integer labelTradeTxnExtract = null;
Integer labelRedeemTxnLoop = null;
Integer labelCheckRedeemTxn = null;
Integer labelCheckRedeemTxnSender = null;
Integer labelPayout = null;
ByteBuffer codeByteBuffer = ByteBuffer.allocate(768);
// Two-pass version
for (int pass = 0; pass < 2; ++pass) {
codeByteBuffer.clear();
try {
/* Initialization */
/* NOP - to ensure DOGECOIN ACCT is unique */
codeByteBuffer.put(OpCode.NOP.compile());
// Use AT creation 'timestamp' as starting point for finding transactions sent to AT
codeByteBuffer.put(OpCode.EXT_FUN_RET.compile(FunctionCode.GET_CREATION_TIMESTAMP, addrLastTxnTimestamp));
// Load B register with AT creator's address so we can save it into addrCreatorAddress1-4
codeByteBuffer.put(OpCode.EXT_FUN.compile(FunctionCode.PUT_CREATOR_INTO_B));
codeByteBuffer.put(OpCode.EXT_FUN_DAT.compile(FunctionCode.GET_B_IND, addrCreatorAddressPointer));
// Set restart position to after this opcode
codeByteBuffer.put(OpCode.SET_PCS.compile());
/* Loop, waiting for message from AT creator's trade address containing trade partner details, or AT owner's address to cancel offer */
/* Transaction processing loop */
labelTradeTxnLoop = codeByteBuffer.position();
/* Sleep until message arrives */
codeByteBuffer.put(OpCode.EXT_FUN_DAT.compile(QortalFunctionCode.SLEEP_UNTIL_MESSAGE.value, addrLastTxnTimestamp));
// Find next transaction (if any) to this AT since the last one (referenced by addrLastTxnTimestamp)
codeByteBuffer.put(OpCode.EXT_FUN_DAT.compile(FunctionCode.PUT_TX_AFTER_TIMESTAMP_INTO_A, addrLastTxnTimestamp));
// If no transaction found, A will be zero. If A is zero, set addrResult to 1, otherwise 0.
codeByteBuffer.put(OpCode.EXT_FUN_RET.compile(FunctionCode.CHECK_A_IS_ZERO, addrResult));
// If addrResult is zero (i.e. A is non-zero, transaction was found) then go check transaction
codeByteBuffer.put(OpCode.BZR_DAT.compile(addrResult, calcOffset(codeByteBuffer, labelCheckTradeTxn)));
// Stop and wait for next block
codeByteBuffer.put(OpCode.STP_IMD.compile());
/* Check transaction */
labelCheckTradeTxn = codeByteBuffer.position();
// Update our 'last found transaction's timestamp' using 'timestamp' from transaction
codeByteBuffer.put(OpCode.EXT_FUN_RET.compile(FunctionCode.GET_TIMESTAMP_FROM_TX_IN_A, addrLastTxnTimestamp));
// Extract transaction type (message/payment) from transaction and save type in addrTxnType
codeByteBuffer.put(OpCode.EXT_FUN_RET.compile(FunctionCode.GET_TYPE_FROM_TX_IN_A, addrTxnType));
// If transaction type is not MESSAGE type then go look for another transaction
codeByteBuffer.put(OpCode.BNE_DAT.compile(addrTxnType, addrMessageTxnType, calcOffset(codeByteBuffer, labelTradeTxnLoop)));
/* Check transaction's sender. We're expecting AT creator's trade address for 'trade' message, or AT creator's own address for 'cancel' message. */
// Extract sender address from transaction into B register
codeByteBuffer.put(OpCode.EXT_FUN.compile(FunctionCode.PUT_ADDRESS_FROM_TX_IN_A_INTO_B));
// Save B register into data segment starting at addrMessageSender1 (as pointed to by addrMessageSenderPointer)
codeByteBuffer.put(OpCode.EXT_FUN_DAT.compile(FunctionCode.GET_B_IND, addrMessageSenderPointer));
// Compare each part of message sender's address with AT creator's trade address. If they don't match, check for cancel situation.
codeByteBuffer.put(OpCode.BNE_DAT.compile(addrMessageSender1, addrCreatorTradeAddress1, calcOffset(codeByteBuffer, labelCheckCancelTxn)));
codeByteBuffer.put(OpCode.BNE_DAT.compile(addrMessageSender2, addrCreatorTradeAddress2, calcOffset(codeByteBuffer, labelCheckCancelTxn)));
codeByteBuffer.put(OpCode.BNE_DAT.compile(addrMessageSender3, addrCreatorTradeAddress3, calcOffset(codeByteBuffer, labelCheckCancelTxn)));
codeByteBuffer.put(OpCode.BNE_DAT.compile(addrMessageSender4, addrCreatorTradeAddress4, calcOffset(codeByteBuffer, labelCheckCancelTxn)));
// Message sender's address matches AT creator's trade address so go process 'trade' message
codeByteBuffer.put(OpCode.JMP_ADR.compile(labelCheckNonRefundTradeTxn == null ? 0 : labelCheckNonRefundTradeTxn));
/* Checking message sender for possible cancel message */
labelCheckCancelTxn = codeByteBuffer.position();
// Compare each part of message sender's address with AT creator's address. If they don't match, look for another transaction.
codeByteBuffer.put(OpCode.BNE_DAT.compile(addrMessageSender1, addrCreatorAddress1, calcOffset(codeByteBuffer, labelNotTradeNorCancelTxn)));
codeByteBuffer.put(OpCode.BNE_DAT.compile(addrMessageSender2, addrCreatorAddress2, calcOffset(codeByteBuffer, labelNotTradeNorCancelTxn)));
codeByteBuffer.put(OpCode.BNE_DAT.compile(addrMessageSender3, addrCreatorAddress3, calcOffset(codeByteBuffer, labelNotTradeNorCancelTxn)));
codeByteBuffer.put(OpCode.BNE_DAT.compile(addrMessageSender4, addrCreatorAddress4, calcOffset(codeByteBuffer, labelNotTradeNorCancelTxn)));
// Partner address is AT creator's address, so cancel offer and finish.
codeByteBuffer.put(OpCode.SET_VAL.compile(addrMode, AcctMode.CANCELLED.value));
// We're finished forever (finishing auto-refunds remaining balance to AT creator)
codeByteBuffer.put(OpCode.FIN_IMD.compile());
/* Not trade nor cancel message */
labelNotTradeNorCancelTxn = codeByteBuffer.position();
// Loop to find another transaction
codeByteBuffer.put(OpCode.JMP_ADR.compile(labelTradeTxnLoop == null ? 0 : labelTradeTxnLoop));
/* Possible switch-to-trade-mode message */
labelCheckNonRefundTradeTxn = codeByteBuffer.position();
// Check 'trade' message we received has expected number of message bytes
codeByteBuffer.put(OpCode.EXT_FUN_RET.compile(QortalFunctionCode.GET_MESSAGE_LENGTH_FROM_TX_IN_A.value, addrMessageLength));
// If message length matches, branch to info extraction code
codeByteBuffer.put(OpCode.BEQ_DAT.compile(addrMessageLength, addrExpectedTradeMessageLength, calcOffset(codeByteBuffer, labelTradeTxnExtract)));
// Message length didn't match - go back to finding another 'trade' MESSAGE transaction
codeByteBuffer.put(OpCode.JMP_ADR.compile(labelTradeTxnLoop == null ? 0 : labelTradeTxnLoop));
/* Extracting info from 'trade' MESSAGE transaction */
labelTradeTxnExtract = codeByteBuffer.position();
// Extract message from transaction into B register
codeByteBuffer.put(OpCode.EXT_FUN.compile(FunctionCode.PUT_MESSAGE_FROM_TX_IN_A_INTO_B));
// Save B register into data segment starting at addrQortalPartnerAddress1 (as pointed to by addrQortalPartnerAddressPointer)
codeByteBuffer.put(OpCode.EXT_FUN_DAT.compile(FunctionCode.GET_B_IND, addrQortalPartnerAddressPointer));
// Extract trade partner's Dogecoin public key hash (PKH) from message into B
codeByteBuffer.put(OpCode.EXT_FUN_DAT.compile(QortalFunctionCode.PUT_PARTIAL_MESSAGE_FROM_TX_IN_A_INTO_B.value, addrTradeMessagePartnerDogecoinPKHOffset));
// Store partner's Dogecoin PKH (we only really use values from B1-B3)
codeByteBuffer.put(OpCode.EXT_FUN_DAT.compile(FunctionCode.GET_B_IND, addrPartnerDogecoinPKHPointer));
// Extract AT trade timeout (minutes) (from B4)
codeByteBuffer.put(OpCode.EXT_FUN_RET.compile(FunctionCode.GET_B4, addrRefundTimeout));
// Grab next 32 bytes
codeByteBuffer.put(OpCode.EXT_FUN_DAT.compile(QortalFunctionCode.PUT_PARTIAL_MESSAGE_FROM_TX_IN_A_INTO_B.value, addrTradeMessageHashOfSecretAOffset));
// Extract hash-of-secret-A (we only really use values from B1-B3)
codeByteBuffer.put(OpCode.EXT_FUN_DAT.compile(FunctionCode.GET_B_IND, addrHashOfSecretAPointer));
// Extract lockTime-A (from B4)
codeByteBuffer.put(OpCode.EXT_FUN_RET.compile(FunctionCode.GET_B4, addrLockTimeA));
// Calculate trade timeout refund 'timestamp' by adding addrRefundTimeout minutes to this transaction's 'timestamp', then save into addrRefundTimestamp
codeByteBuffer.put(OpCode.EXT_FUN_RET_DAT_2.compile(FunctionCode.ADD_MINUTES_TO_TIMESTAMP, addrRefundTimestamp, addrLastTxnTimestamp, addrRefundTimeout));
/* We are in 'trade mode' */
codeByteBuffer.put(OpCode.SET_VAL.compile(addrMode, AcctMode.TRADING.value));
// Set restart position to after this opcode
codeByteBuffer.put(OpCode.SET_PCS.compile());
/* Loop, waiting for trade timeout or 'redeem' MESSAGE from Qortal trade partner */
// Fetch current block 'timestamp'
codeByteBuffer.put(OpCode.EXT_FUN_RET.compile(FunctionCode.GET_BLOCK_TIMESTAMP, addrBlockTimestamp));
// If we're not past refund 'timestamp' then look for next transaction
codeByteBuffer.put(OpCode.BLT_DAT.compile(addrBlockTimestamp, addrRefundTimestamp, calcOffset(codeByteBuffer, labelRedeemTxnLoop)));
// We're past refund 'timestamp' so go refund everything back to AT creator
codeByteBuffer.put(OpCode.JMP_ADR.compile(labelRefund == null ? 0 : labelRefund));
/* Transaction processing loop */
labelRedeemTxnLoop = codeByteBuffer.position();
/* Sleep until message arrives */
codeByteBuffer.put(OpCode.EXT_FUN_DAT.compile(QortalFunctionCode.SLEEP_UNTIL_MESSAGE.value, addrLastTxnTimestamp));
// Find next transaction to this AT since the last one (if any)
codeByteBuffer.put(OpCode.EXT_FUN_DAT.compile(FunctionCode.PUT_TX_AFTER_TIMESTAMP_INTO_A, addrLastTxnTimestamp));
// If no transaction found, A will be zero. If A is zero, set addrComparator to 1, otherwise 0.
codeByteBuffer.put(OpCode.EXT_FUN_RET.compile(FunctionCode.CHECK_A_IS_ZERO, addrResult));
// If addrResult is zero (i.e. A is non-zero, transaction was found) then go check transaction
codeByteBuffer.put(OpCode.BZR_DAT.compile(addrResult, calcOffset(codeByteBuffer, labelCheckRedeemTxn)));
// Stop and wait for next block
codeByteBuffer.put(OpCode.STP_IMD.compile());
/* Check transaction */
labelCheckRedeemTxn = codeByteBuffer.position();
// Update our 'last found transaction's timestamp' using 'timestamp' from transaction
codeByteBuffer.put(OpCode.EXT_FUN_RET.compile(FunctionCode.GET_TIMESTAMP_FROM_TX_IN_A, addrLastTxnTimestamp));
// Extract transaction type (message/payment) from transaction and save type in addrTxnType
codeByteBuffer.put(OpCode.EXT_FUN_RET.compile(FunctionCode.GET_TYPE_FROM_TX_IN_A, addrTxnType));
// If transaction type is not MESSAGE type then go look for another transaction
codeByteBuffer.put(OpCode.BNE_DAT.compile(addrTxnType, addrMessageTxnType, calcOffset(codeByteBuffer, labelRedeemTxnLoop)));
/* Check message payload length */
codeByteBuffer.put(OpCode.EXT_FUN_RET.compile(QortalFunctionCode.GET_MESSAGE_LENGTH_FROM_TX_IN_A.value, addrMessageLength));
// If message length matches, branch to sender checking code
codeByteBuffer.put(OpCode.BEQ_DAT.compile(addrMessageLength, addrExpectedRedeemMessageLength, calcOffset(codeByteBuffer, labelCheckRedeemTxnSender)));
// Message length didn't match - go back to finding another 'redeem' MESSAGE transaction
codeByteBuffer.put(OpCode.JMP_ADR.compile(labelRedeemTxnLoop == null ? 0 : labelRedeemTxnLoop));
/* Check transaction's sender */
labelCheckRedeemTxnSender = codeByteBuffer.position();
// Extract sender address from transaction into B register
codeByteBuffer.put(OpCode.EXT_FUN.compile(FunctionCode.PUT_ADDRESS_FROM_TX_IN_A_INTO_B));
// Save B register into data segment starting at addrMessageSender1 (as pointed to by addrMessageSenderPointer)
codeByteBuffer.put(OpCode.EXT_FUN_DAT.compile(FunctionCode.GET_B_IND, addrMessageSenderPointer));
// Compare each part of transaction's sender's address with expected address. If they don't match, look for another transaction.
codeByteBuffer.put(OpCode.BNE_DAT.compile(addrMessageSender1, addrQortalPartnerAddress1, calcOffset(codeByteBuffer, labelRedeemTxnLoop)));
codeByteBuffer.put(OpCode.BNE_DAT.compile(addrMessageSender2, addrQortalPartnerAddress2, calcOffset(codeByteBuffer, labelRedeemTxnLoop)));
codeByteBuffer.put(OpCode.BNE_DAT.compile(addrMessageSender3, addrQortalPartnerAddress3, calcOffset(codeByteBuffer, labelRedeemTxnLoop)));
codeByteBuffer.put(OpCode.BNE_DAT.compile(addrMessageSender4, addrQortalPartnerAddress4, calcOffset(codeByteBuffer, labelRedeemTxnLoop)));
/* Check 'secret-A' in transaction's message */
// Extract secret-A from first 32 bytes of message from transaction into B register
codeByteBuffer.put(OpCode.EXT_FUN.compile(FunctionCode.PUT_MESSAGE_FROM_TX_IN_A_INTO_B));
// Save B register into data segment starting at addrMessageData (as pointed to by addrMessageDataPointer)
codeByteBuffer.put(OpCode.EXT_FUN_DAT.compile(FunctionCode.GET_B_IND, addrMessageDataPointer));
// Load B register with expected hash result (as pointed to by addrHashOfSecretAPointer)
codeByteBuffer.put(OpCode.EXT_FUN_DAT.compile(FunctionCode.SET_B_IND, addrHashOfSecretAPointer));
// Perform HASH160 using source data at addrMessageData. (Location and length specified via addrMessageDataPointer and addrMessageDataLength).
// Save the equality result (1 if they match, 0 otherwise) into addrResult.
codeByteBuffer.put(OpCode.EXT_FUN_RET_DAT_2.compile(FunctionCode.CHECK_HASH160_WITH_B, addrResult, addrMessageDataPointer, addrMessageDataLength));
// If hashes don't match, addrResult will be zero so go find another transaction
codeByteBuffer.put(OpCode.BNZ_DAT.compile(addrResult, calcOffset(codeByteBuffer, labelPayout)));
codeByteBuffer.put(OpCode.JMP_ADR.compile(labelRedeemTxnLoop == null ? 0 : labelRedeemTxnLoop));
/* Success! Pay arranged amount to receiving address */
labelPayout = codeByteBuffer.position();
// Extract Qortal receiving address from next 32 bytes of message from transaction into B register
codeByteBuffer.put(OpCode.EXT_FUN_DAT.compile(QortalFunctionCode.PUT_PARTIAL_MESSAGE_FROM_TX_IN_A_INTO_B.value, addrRedeemMessageReceivingAddressOffset));
// Save B register into data segment starting at addrPartnerReceivingAddress (as pointed to by addrPartnerReceivingAddressPointer)
codeByteBuffer.put(OpCode.EXT_FUN_DAT.compile(FunctionCode.GET_B_IND, addrPartnerReceivingAddressPointer));
// Pay AT's balance to receiving address
codeByteBuffer.put(OpCode.EXT_FUN_DAT.compile(FunctionCode.PAY_TO_ADDRESS_IN_B, addrQortAmount));
// Set redeemed mode
codeByteBuffer.put(OpCode.SET_VAL.compile(addrMode, AcctMode.REDEEMED.value));
// We're finished forever (finishing auto-refunds remaining balance to AT creator)
codeByteBuffer.put(OpCode.FIN_IMD.compile());
// Fall-through to refunding any remaining balance back to AT creator
/* Refund balance back to AT creator */
labelRefund = codeByteBuffer.position();
// Set refunded mode
codeByteBuffer.put(OpCode.SET_VAL.compile(addrMode, AcctMode.REFUNDED.value));
// We're finished forever (finishing auto-refunds remaining balance to AT creator)
codeByteBuffer.put(OpCode.FIN_IMD.compile());
} catch (CompilationException e) {
throw new IllegalStateException("Unable to compile DOGE-QORT ACCT?", e);
}
}
codeByteBuffer.flip();
byte[] codeBytes = new byte[codeByteBuffer.limit()];
codeByteBuffer.get(codeBytes);
assert Arrays.equals(Crypto.digest(codeBytes), DogecoinACCTv2.CODE_BYTES_HASH)
: String.format("BTCACCT.CODE_BYTES_HASH mismatch: expected %s, actual %s", HashCode.fromBytes(CODE_BYTES_HASH), HashCode.fromBytes(Crypto.digest(codeBytes)));
final short ciyamAtVersion = 2;
final short numCallStackPages = 0;
final short numUserStackPages = 0;
final long minActivationAmount = 0L;
return MachineState.toCreationBytes(ciyamAtVersion, codeBytes, dataByteBuffer.array(), numCallStackPages, numUserStackPages, minActivationAmount);
}
/**
* Returns CrossChainTradeData with useful info extracted from AT.
*/
@Override
public CrossChainTradeData populateTradeData(Repository repository, ATData atData) throws DataException {
ATStateData atStateData = repository.getATRepository().getLatestATState(atData.getATAddress());
return populateTradeData(repository, atData.getCreatorPublicKey(), atData.getCreation(), atStateData);
}
/**
* Returns CrossChainTradeData with useful info extracted from AT.
*/
@Override
public CrossChainTradeData populateTradeData(Repository repository, ATStateData atStateData) throws DataException {
ATData atData = repository.getATRepository().fromATAddress(atStateData.getATAddress());
return populateTradeData(repository, atData.getCreatorPublicKey(), atData.getCreation(), atStateData);
}
/**
* Returns CrossChainTradeData with useful info extracted from AT.
*/
public CrossChainTradeData populateTradeData(Repository repository, byte[] creatorPublicKey, long creationTimestamp, ATStateData atStateData) throws DataException {
byte[] addressBytes = new byte[25]; // for general use
String atAddress = atStateData.getATAddress();
CrossChainTradeData tradeData = new CrossChainTradeData();
tradeData.foreignBlockchain = SupportedBlockchain.DOGECOIN.name();
tradeData.acctName = NAME;
tradeData.qortalAtAddress = atAddress;
tradeData.qortalCreator = Crypto.toAddress(creatorPublicKey);
tradeData.creationTimestamp = creationTimestamp;
Account atAccount = new Account(repository, atAddress);
tradeData.qortBalance = atAccount.getConfirmedBalance(Asset.QORT);
byte[] stateData = atStateData.getStateData();
ByteBuffer dataByteBuffer = ByteBuffer.wrap(stateData);
dataByteBuffer.position(MachineState.HEADER_LENGTH);
/* Constants */
// Skip creator's trade address
dataByteBuffer.get(addressBytes);
tradeData.qortalCreatorTradeAddress = Base58.encode(addressBytes);
dataByteBuffer.position(dataByteBuffer.position() + 32 - addressBytes.length);
// Creator's Dogecoin/foreign public key hash
tradeData.creatorForeignPKH = new byte[20];
dataByteBuffer.get(tradeData.creatorForeignPKH);
dataByteBuffer.position(dataByteBuffer.position() + 32 - tradeData.creatorForeignPKH.length); // skip to 32 bytes
// We don't use secret-B
tradeData.hashOfSecretB = null;
// Redeem payout
tradeData.qortAmount = dataByteBuffer.getLong();
// Expected DOGE amount
tradeData.expectedForeignAmount = dataByteBuffer.getLong();
// Trade timeout
tradeData.tradeTimeout = (int) dataByteBuffer.getLong();
// Skip MESSAGE transaction type
dataByteBuffer.position(dataByteBuffer.position() + 8);
// Skip expected 'trade' message length
dataByteBuffer.position(dataByteBuffer.position() + 8);
// Skip expected 'redeem' message length
dataByteBuffer.position(dataByteBuffer.position() + 8);
// Skip pointer to creator's address
dataByteBuffer.position(dataByteBuffer.position() + 8);
// Skip pointer to partner's Qortal trade address
dataByteBuffer.position(dataByteBuffer.position() + 8);
// Skip pointer to message sender
dataByteBuffer.position(dataByteBuffer.position() + 8);
// Skip 'trade' message data offset for partner's Dogecoin PKH
dataByteBuffer.position(dataByteBuffer.position() + 8);
// Skip pointer to partner's Dogecoin PKH
dataByteBuffer.position(dataByteBuffer.position() + 8);
// Skip 'trade' message data offset for hash-of-secret-A
dataByteBuffer.position(dataByteBuffer.position() + 8);
// Skip pointer to hash-of-secret-A
dataByteBuffer.position(dataByteBuffer.position() + 8);
// Skip 'redeem' message data offset for partner's Qortal receiving address
dataByteBuffer.position(dataByteBuffer.position() + 8);
// Skip pointer to message data
dataByteBuffer.position(dataByteBuffer.position() + 8);
// Skip message data length
dataByteBuffer.position(dataByteBuffer.position() + 8);
// Skip pointer to partner's receiving address
dataByteBuffer.position(dataByteBuffer.position() + 8);
/* End of constants / begin variables */
// Skip AT creator's address
dataByteBuffer.position(dataByteBuffer.position() + 8 * 4);
// Partner's trade address (if present)
dataByteBuffer.get(addressBytes);
String qortalRecipient = Base58.encode(addressBytes);
dataByteBuffer.position(dataByteBuffer.position() + 32 - addressBytes.length);
// Potential lockTimeA (if in trade mode)
int lockTimeA = (int) dataByteBuffer.getLong();
// AT refund timeout (probably only useful for debugging)
int refundTimeout = (int) dataByteBuffer.getLong();
// Trade-mode refund timestamp (AT 'timestamp' converted to Qortal block height)
long tradeRefundTimestamp = dataByteBuffer.getLong();
// Skip last transaction timestamp
dataByteBuffer.position(dataByteBuffer.position() + 8);
// Skip block timestamp
dataByteBuffer.position(dataByteBuffer.position() + 8);
// Skip transaction type
dataByteBuffer.position(dataByteBuffer.position() + 8);
// Skip temporary result
dataByteBuffer.position(dataByteBuffer.position() + 8);
// Skip temporary message sender
dataByteBuffer.position(dataByteBuffer.position() + 8 * 4);
// Skip message length
dataByteBuffer.position(dataByteBuffer.position() + 8);
// Skip temporary message data
dataByteBuffer.position(dataByteBuffer.position() + 8 * 4);
// Potential hash160 of secret A
byte[] hashOfSecretA = new byte[20];
dataByteBuffer.get(hashOfSecretA);
dataByteBuffer.position(dataByteBuffer.position() + 32 - hashOfSecretA.length); // skip to 32 bytes
// Potential partner's Dogecoin PKH
byte[] partnerDogecoinPKH = new byte[20];
dataByteBuffer.get(partnerDogecoinPKH);
dataByteBuffer.position(dataByteBuffer.position() + 32 - partnerDogecoinPKH.length); // skip to 32 bytes
// Partner's receiving address (if present)
byte[] partnerReceivingAddress = new byte[25];
dataByteBuffer.get(partnerReceivingAddress);
dataByteBuffer.position(dataByteBuffer.position() + 32 - partnerReceivingAddress.length); // skip to 32 bytes
// Trade AT's 'mode'
long modeValue = dataByteBuffer.getLong();
AcctMode mode = AcctMode.valueOf((int) (modeValue & 0xffL));
/* End of variables */
if (mode != null && mode != AcctMode.OFFERING) {
tradeData.mode = mode;
tradeData.refundTimeout = refundTimeout;
tradeData.tradeRefundHeight = new Timestamp(tradeRefundTimestamp).blockHeight;
tradeData.qortalPartnerAddress = qortalRecipient;
tradeData.hashOfSecretA = hashOfSecretA;
tradeData.partnerForeignPKH = partnerDogecoinPKH;
tradeData.lockTimeA = lockTimeA;
if (mode == AcctMode.REDEEMED)
tradeData.qortalPartnerReceivingAddress = Base58.encode(partnerReceivingAddress);
} else {
tradeData.mode = AcctMode.OFFERING;
}
tradeData.duplicateDeprecated();
return tradeData;
}
/** Returns 'offer' MESSAGE payload for trade partner to send to AT creator's trade address. */
public static byte[] buildOfferMessage(byte[] partnerBitcoinPKH, byte[] hashOfSecretA, int lockTimeA) {
byte[] lockTimeABytes = BitTwiddling.toBEByteArray((long) lockTimeA);
return Bytes.concat(partnerBitcoinPKH, hashOfSecretA, lockTimeABytes);
}
/** Returns info extracted from 'offer' MESSAGE payload sent by trade partner to AT creator's trade address, or null if not valid. */
public static OfferMessageData extractOfferMessageData(byte[] messageData) {
if (messageData == null || messageData.length != OFFER_MESSAGE_LENGTH)
return null;
OfferMessageData offerMessageData = new OfferMessageData();
offerMessageData.partnerDogecoinPKH = Arrays.copyOfRange(messageData, 0, 20);
offerMessageData.hashOfSecretA = Arrays.copyOfRange(messageData, 20, 40);
offerMessageData.lockTimeA = BitTwiddling.longFromBEBytes(messageData, 40);
return offerMessageData;
}
/** Returns 'trade' MESSAGE payload for AT creator to send to AT. */
public static byte[] buildTradeMessage(String partnerQortalTradeAddress, byte[] partnerBitcoinPKH, byte[] hashOfSecretA, int lockTimeA, int refundTimeout) {
byte[] data = new byte[TRADE_MESSAGE_LENGTH];
byte[] partnerQortalAddressBytes = Base58.decode(partnerQortalTradeAddress);
byte[] lockTimeABytes = BitTwiddling.toBEByteArray((long) lockTimeA);
byte[] refundTimeoutBytes = BitTwiddling.toBEByteArray((long) refundTimeout);
System.arraycopy(partnerQortalAddressBytes, 0, data, 0, partnerQortalAddressBytes.length);
System.arraycopy(partnerBitcoinPKH, 0, data, 32, partnerBitcoinPKH.length);
System.arraycopy(refundTimeoutBytes, 0, data, 56, refundTimeoutBytes.length);
System.arraycopy(hashOfSecretA, 0, data, 64, hashOfSecretA.length);
System.arraycopy(lockTimeABytes, 0, data, 88, lockTimeABytes.length);
return data;
}
/** Returns 'cancel' MESSAGE payload for AT creator to cancel trade AT. */
@Override
public byte[] buildCancelMessage(String creatorQortalAddress) {
byte[] data = new byte[CANCEL_MESSAGE_LENGTH];
byte[] creatorQortalAddressBytes = Base58.decode(creatorQortalAddress);
System.arraycopy(creatorQortalAddressBytes, 0, data, 0, creatorQortalAddressBytes.length);
return data;
}
/** Returns 'redeem' MESSAGE payload for trade partner to send to AT. */
public static byte[] buildRedeemMessage(byte[] secretA, String qortalReceivingAddress) {
byte[] data = new byte[REDEEM_MESSAGE_LENGTH];
byte[] qortalReceivingAddressBytes = Base58.decode(qortalReceivingAddress);
System.arraycopy(secretA, 0, data, 0, secretA.length);
System.arraycopy(qortalReceivingAddressBytes, 0, data, 32, qortalReceivingAddressBytes.length);
return data;
}
/** Returns refund timeout (minutes) based on trade partner's 'offer' MESSAGE timestamp and P2SH-A locktime. */
public static int calcRefundTimeout(long offerMessageTimestamp, int lockTimeA) {
// refund should be triggered halfway between offerMessageTimestamp and lockTimeA
return (int) ((lockTimeA - (offerMessageTimestamp / 1000L)) / 2L / 60L);
}
@Override
public byte[] findSecretA(Repository repository, CrossChainTradeData crossChainTradeData) throws DataException {
String atAddress = crossChainTradeData.qortalAtAddress;
String redeemerAddress = crossChainTradeData.qortalPartnerAddress;
// We don't have partner's public key so we check every message to AT
List<MessageTransactionData> messageTransactionsData = repository.getMessageRepository().getMessagesByParticipants(null, atAddress, null, null, null);
if (messageTransactionsData == null)
return null;
// Find 'redeem' message
for (MessageTransactionData messageTransactionData : messageTransactionsData) {
// Check message payload type/encryption
if (messageTransactionData.isText() || messageTransactionData.isEncrypted())
continue;
// Check message payload size
byte[] messageData = messageTransactionData.getData();
if (messageData.length != REDEEM_MESSAGE_LENGTH)
// Wrong payload length
continue;
// Check sender
if (!Crypto.toAddress(messageTransactionData.getSenderPublicKey()).equals(redeemerAddress))
// Wrong sender;
continue;
// Extract secretA
byte[] secretA = new byte[32];
System.arraycopy(messageData, 0, secretA, 0, secretA.length);
byte[] hashOfSecretA = Crypto.hash160(secretA);
if (!Arrays.equals(hashOfSecretA, crossChainTradeData.hashOfSecretA))
continue;
return secretA;
}
return null;
}
}

1
src/main/java/org/qortal/crosschain/SupportedBlockchain.java
View File

@ -45,7 +45,6 @@ public enum SupportedBlockchain {
DOGECOIN(Arrays.asList( DOGECOIN(Arrays.asList(
Triple.valueOf(DogecoinACCTv1.NAME, DogecoinACCTv1.CODE_BYTES_HASH, DogecoinACCTv1::getInstance), Triple.valueOf(DogecoinACCTv1.NAME, DogecoinACCTv1.CODE_BYTES_HASH, DogecoinACCTv1::getInstance),
Triple.valueOf(DogecoinACCTv2.NAME, DogecoinACCTv2.CODE_BYTES_HASH, DogecoinACCTv2::getInstance),
Triple.valueOf(DogecoinACCTv3.NAME, DogecoinACCTv3.CODE_BYTES_HASH, DogecoinACCTv3::getInstance) Triple.valueOf(DogecoinACCTv3.NAME, DogecoinACCTv3.CODE_BYTES_HASH, DogecoinACCTv3::getInstance)
)) { )) {
@Override @Override