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Fix fee calculation, add adjustable non-trade mining fee

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This commit is contained in:
Manfred Karrer 2016-04-06 23:26:27 +02:00
parent 2abc2cd5bc
commit 565c44d94c
12 changed files with 230 additions and 144 deletions
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10
core/src/main/java/io/bitsquare/btc/FeePolicy.java
View file

@ -50,14 +50,14 @@ public class FeePolicy {
// The BitcoinJ fee calculation use kb so a tx size < 1kb will still pay the fee for a kb tx.
// Our payout tx has about 370 bytes so we get a fee/kb value of about 90 satoshi/byte making it high priority
// Other payout transactions (E.g. arbitrators many collected transactions) will go with 30 satoshi/byte if > 1kb
private static Coin FEE_PER_KB = Coin.valueOf(20_000); // 0.0002 BTC about 0.08 EUR @ 400 EUR/BTC
private static Coin NON_TRADE_FEE_PER_KB = Coin.valueOf(10_000); // 0.0001 BTC about 0.04 EUR @ 400 EUR/BTC
public static void setFeePerKb(Coin feePerKb) {
FEE_PER_KB = feePerKb;
public static void setNonTradeFeePerKb(Coin nonTradeFeePerKb) {
NON_TRADE_FEE_PER_KB = nonTradeFeePerKb;
}
public static Coin getFeePerKb() {
return FEE_PER_KB;
public static Coin getNonTradeFeePerKb() {
return NON_TRADE_FEE_PER_KB;
}
// Some wallets don't support manual fees. Most use at least 0.0001 BTC (0.04 EUR @ 400 EUR/BTC)

224
core/src/main/java/io/bitsquare/btc/WalletService.java
View file

@ -38,7 +38,10 @@ import org.bitcoinj.kits.WalletAppKit;
import org.bitcoinj.params.MainNetParams;
import org.bitcoinj.params.RegTestParams;
import org.bitcoinj.params.TestNet3Params;
import org.bitcoinj.script.Script;
import org.bitcoinj.utils.Threading;
import org.bitcoinj.wallet.CoinSelection;
import org.bitcoinj.wallet.CoinSelector;
import org.bitcoinj.wallet.DeterministicSeed;
import org.jetbrains.annotations.NotNull;
import org.slf4j.Logger;
@ -347,6 +350,10 @@ public class WalletService {
return addressEntryList.addAddressEntry(new AddressEntry(wallet.freshReceiveKey(), wallet.getParams(), context));
}
public AddressEntry createAddressEntry(AddressEntry.Context context) {
return addressEntryList.addAddressEntry(new AddressEntry(wallet.freshReceiveKey(), wallet.getParams(), context));
}
public Optional<AddressEntry> findAddressEntry(String address, AddressEntry.Context context) {
return getAddressEntryListAsImmutableList().stream()
.filter(e -> address.equals(e.getAddressString()))
@ -521,45 +528,156 @@ public class WalletService {
///////////////////////////////////////////////////////////////////////////////////////////
// Withdrawal
// Withdrawal Fee calculation
///////////////////////////////////////////////////////////////////////////////////////////
public Coin getRequiredFee(String fromAddress,
String toAddress,
Coin amount,
@Nullable KeyParameter aesKey,
AddressEntry.Context context) throws AddressFormatException, AddressEntryException {
Coin fee;
try {
wallet.completeTx(getSendRequest(fromAddress, toAddress, amount, aesKey, context));
// We use the min fee for now as the mix of savingswallet/trade wallet has some nasty edge cases...
fee = FeePolicy.getFixedTxFeeForTrades();
} catch (InsufficientMoneyException e) {
log.info("The amount to be transferred is not enough to pay the transaction fees of {}. " +
"We subtract that fee from the receivers amount to make the transaction possible.");
fee = e.missing;
}
return fee;
Optional<AddressEntry> addressEntry = findAddressEntry(fromAddress, context);
if (!addressEntry.isPresent())
throw new AddressEntryException("WithdrawFromAddress is not found in our wallet.");
checkNotNull(addressEntry.get().getAddress(), "addressEntry.get().getAddress() must nto be null");
CoinSelector selector = new TradeWalletCoinSelector(params, addressEntry.get().getAddress());
return getFee(toAddress,
amount,
selector);
}
public Coin getRequiredFeeForMultipleAddresses(Set<String> fromAddresses,
String toAddress,
Coin amount,
@Nullable KeyParameter aesKey) throws AddressFormatException,
Coin amount) throws AddressFormatException,
AddressEntryException {
Coin fee;
try {
wallet.completeTx(getSendRequestForMultipleAddresses(fromAddresses, toAddress, amount, null, aesKey));
// We use the min fee for now as the mix of savingswallet/trade wallet has some nasty edge cases...
fee = FeePolicy.getFixedTxFeeForTrades();
} catch (InsufficientMoneyException e) {
log.info("The amount to be transferred is not enough to pay the transaction fees of {}. " +
"We subtract that fee from the receivers amount to make the transaction possible.");
fee = e.missing;
}
Set<AddressEntry> addressEntries = fromAddresses.stream()
.map(address -> {
Optional<AddressEntry> addressEntryOptional = findAddressEntry(address, AddressEntry.Context.AVAILABLE);
if (!addressEntryOptional.isPresent())
addressEntryOptional = findAddressEntry(address, AddressEntry.Context.OFFER_FUNDING);
if (!addressEntryOptional.isPresent())
addressEntryOptional = findAddressEntry(address, AddressEntry.Context.TRADE_PAYOUT);
if (!addressEntryOptional.isPresent())
addressEntryOptional = findAddressEntry(address, AddressEntry.Context.ARBITRATOR);
return addressEntryOptional;
})
.filter(Optional::isPresent)
.map(Optional::get)
.collect(Collectors.toSet());
if (addressEntries.isEmpty())
throw new AddressEntryException("No Addresses for withdraw found in our wallet");
CoinSelector selector = new MultiAddressesCoinSelector(params, addressEntries);
return getFee(toAddress,
amount,
selector);
}
private Coin getFee(String toAddress,
Coin amount,
CoinSelector selector) throws AddressFormatException, AddressEntryException {
List<TransactionOutput> candidates = wallet.calculateAllSpendCandidates();
CoinSelection bestCoinSelection = selector.select(params.getMaxMoney(), candidates);
Transaction tx = new Transaction(params);
tx.addOutput(amount, new Address(params, toAddress));
if (!adjustOutputDownwardsForFee(tx, bestCoinSelection, Coin.ZERO, FeePolicy.getNonTradeFeePerKb()))
throw new Wallet.CouldNotAdjustDownwards();
Coin fee = amount.subtract(tx.getOutput(0).getValue());
log.info("Required fee " + fee);
return fee;
}
private boolean adjustOutputDownwardsForFee(Transaction tx, CoinSelection coinSelection, Coin baseFee, Coin feePerKb) {
TransactionOutput output = tx.getOutput(0);
// Check if we need additional fee due to the transaction's size
int size = tx.bitcoinSerialize().length;
size += estimateBytesForSigning(coinSelection);
Coin fee = baseFee.add(feePerKb.multiply((size / 1000) + 1));
output.setValue(output.getValue().subtract(fee));
// Check if we need additional fee due to the output's value
if (output.getValue().compareTo(Coin.CENT) < 0 && fee.compareTo(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE) < 0)
output.setValue(output.getValue().subtract(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE.subtract(fee)));
return output.getMinNonDustValue().compareTo(output.getValue()) <= 0;
}
private int estimateBytesForSigning(CoinSelection selection) {
int size = 0;
for (TransactionOutput output : selection.gathered) {
try {
Script script = output.getScriptPubKey();
ECKey key = null;
Script redeemScript = null;
if (script.isSentToAddress()) {
key = wallet.findKeyFromPubHash(script.getPubKeyHash());
checkNotNull(key, "Coin selection includes unspendable outputs");
} else if (script.isPayToScriptHash()) {
redeemScript = wallet.findRedeemDataFromScriptHash(script.getPubKeyHash()).redeemScript;
checkNotNull(redeemScript, "Coin selection includes unspendable outputs");
}
size += script.getNumberOfBytesRequiredToSpend(key, redeemScript);
} catch (ScriptException e) {
// If this happens it means an output script in a wallet tx could not be understood. That should never
// happen, if it does it means the wallet has got into an inconsistent state.
throw new IllegalStateException(e);
}
}
return size;
}
///////////////////////////////////////////////////////////////////////////////////////////
// Withdrawal Send
///////////////////////////////////////////////////////////////////////////////////////////
public String sendFunds(String fromAddress,
String toAddress,
Coin receiverAmount,
@Nullable KeyParameter aesKey,
AddressEntry.Context context,
FutureCallback<Transaction> callback) throws AddressFormatException,
AddressEntryException, InsufficientMoneyException {
Wallet.SendResult sendResult = wallet.sendCoins(getSendRequest(fromAddress, toAddress, receiverAmount, aesKey, context));
Futures.addCallback(sendResult.broadcastComplete, callback);
printTxWithInputs("sendFunds", sendResult.tx);
return sendResult.tx.getHashAsString();
}
public String sendFundsForMultipleAddresses(Set<String> fromAddresses,
String toAddress,
Coin receiverAmount,
@Nullable String changeAddress,
@Nullable KeyParameter aesKey,
FutureCallback<Transaction> callback) throws AddressFormatException,
AddressEntryException, InsufficientMoneyException {
Wallet.SendResult sendResult = wallet.sendCoins(getSendRequestForMultipleAddresses(fromAddresses, toAddress,
receiverAmount, changeAddress, aesKey));
Futures.addCallback(sendResult.broadcastComplete, callback);
printTxWithInputs("sendFunds", sendResult.tx);
return sendResult.tx.getHashAsString();
}
public void emptyWallet(String toAddress, KeyParameter aesKey, ResultHandler resultHandler, ErrorMessageHandler errorMessageHandler)
throws InsufficientMoneyException, AddressFormatException {
Wallet.SendRequest sendRequest = Wallet.SendRequest.emptyWallet(new Address(params, toAddress));
sendRequest.aesKey = aesKey;
Wallet.SendResult sendResult = wallet.sendCoins(sendRequest);
sendRequest.feePerKb = FeePolicy.getNonTradeFeePerKb();
Futures.addCallback(sendResult.broadcastComplete, new FutureCallback<Transaction>() {
@Override
public void onSuccess(Transaction result) {
resultHandler.handleResult();
}
@Override
public void onFailure(@NotNull Throwable t) {
errorMessageHandler.handleErrorMessage(t.getMessage());
}
});
}
private Wallet.SendRequest getSendRequest(String fromAddress,
String toAddress,
Coin amount,
@ -581,7 +699,7 @@ public class WalletService {
checkNotNull(addressEntry.get().getAddress(), "addressEntry.get().getAddress() must nto be null");
sendRequest.coinSelector = new TradeWalletCoinSelector(params, addressEntry.get().getAddress());
sendRequest.changeAddress = addressEntry.get().getAddress();
sendRequest.feePerKb = FeePolicy.getFeePerKb();
sendRequest.feePerKb = FeePolicy.getNonTradeFeePerKb();
return sendRequest;
}
@ -606,6 +724,8 @@ public class WalletService {
addressEntryOptional = findAddressEntry(address, AddressEntry.Context.OFFER_FUNDING);
if (!addressEntryOptional.isPresent())
addressEntryOptional = findAddressEntry(address, AddressEntry.Context.TRADE_PAYOUT);
if (!addressEntryOptional.isPresent())
addressEntryOptional = findAddressEntry(address, AddressEntry.Context.ARBITRATOR);
return addressEntryOptional;
})
.filter(Optional::isPresent)
@ -629,60 +749,10 @@ public class WalletService {
}
checkNotNull(changeAddressAddressEntry, "change address must not be null");
sendRequest.changeAddress = changeAddressAddressEntry.getAddress();
sendRequest.feePerKb = FeePolicy.getFeePerKb();
sendRequest.feePerKb = FeePolicy.getNonTradeFeePerKb();
return sendRequest;
}
public String sendFunds(String fromAddress,
String toAddress,
Coin amount,
@Nullable KeyParameter aesKey,
AddressEntry.Context context,
FutureCallback<Transaction> callback) throws AddressFormatException,
AddressEntryException, InsufficientMoneyException {
Coin fee = getRequiredFee(fromAddress, toAddress, amount, aesKey, context);
Wallet.SendResult sendResult = wallet.sendCoins(getSendRequest(fromAddress, toAddress, amount.subtract(fee), aesKey, context));
Futures.addCallback(sendResult.broadcastComplete, callback);
printTxWithInputs("sendFunds", sendResult.tx);
return sendResult.tx.getHashAsString();
}
public String sendFundsForMultipleAddresses(Set<String> fromAddresses,
String toAddress,
Coin amount,
@Nullable String changeAddress,
@Nullable KeyParameter aesKey,
FutureCallback<Transaction> callback) throws AddressFormatException,
AddressEntryException, InsufficientMoneyException {
Coin fee = getRequiredFeeForMultipleAddresses(fromAddresses, toAddress, amount, aesKey);
Wallet.SendResult sendResult = wallet.sendCoins(getSendRequestForMultipleAddresses(fromAddresses, toAddress,
amount.subtract(fee), changeAddress, aesKey));
Futures.addCallback(sendResult.broadcastComplete, callback);
printTxWithInputs("sendFunds", sendResult.tx);
return sendResult.tx.getHashAsString();
}
public void emptyWallet(String toAddress, KeyParameter aesKey, ResultHandler resultHandler, ErrorMessageHandler errorMessageHandler)
throws InsufficientMoneyException, AddressFormatException {
Wallet.SendRequest sendRequest = Wallet.SendRequest.emptyWallet(new Address(params, toAddress));
sendRequest.aesKey = aesKey;
Wallet.SendResult sendResult = wallet.sendCoins(sendRequest);
sendRequest.feePerKb = FeePolicy.getFeePerKb();
Futures.addCallback(sendResult.broadcastComplete, new FutureCallback<Transaction>() {
@Override
public void onSuccess(Transaction result) {
resultHandler.handleResult();
}
@Override
public void onFailure(@NotNull Throwable t) {
errorMessageHandler.handleErrorMessage(t.getMessage());
}
});
}
///////////////////////////////////////////////////////////////////////////////////////////
// Getters

4
core/src/main/java/io/bitsquare/trade/TradeManager.java
View file

@ -306,7 +306,7 @@ public class TradeManager {
// Trade
///////////////////////////////////////////////////////////////////////////////////////////
public void onWithdrawRequest(String toAddress, KeyParameter aesKey, Trade trade, ResultHandler resultHandler, FaultHandler faultHandler) {
public void onWithdrawRequest(String toAddress, Coin receiverAmount, KeyParameter aesKey, Trade trade, ResultHandler resultHandler, FaultHandler faultHandler) {
String fromAddress = walletService.getOrCreateAddressEntry(trade.getId(), AddressEntry.Context.TRADE_PAYOUT).getAddressString();
FutureCallback<Transaction> callback = new FutureCallback<Transaction>() {
@ -328,7 +328,7 @@ public class TradeManager {
}
};
try {
walletService.sendFunds(fromAddress, toAddress, trade.getPayoutAmount(), aesKey, AddressEntry.Context.TRADE_PAYOUT, callback);
walletService.sendFunds(fromAddress, toAddress, receiverAmount, aesKey, AddressEntry.Context.TRADE_PAYOUT, callback);
} catch (AddressFormatException | InsufficientMoneyException | AddressEntryException e) {
e.printStackTrace();
log.error(e.getMessage());

20
core/src/main/java/io/bitsquare/user/Preferences.java
View file

@ -105,7 +105,7 @@ public final class Preferences implements Persistable {
private boolean showOwnOffersInOfferBook;
private Locale preferredLocale;
private TradeCurrency preferredTradeCurrency;
private long txFeePerKB = FeePolicy.getFeePerKb().value;
private long nonTradeTxFeePerKB = FeePolicy.getNonTradeFeePerKb().value;
private double maxPriceDistanceInPercent;
// Observable wrappers
@ -162,7 +162,7 @@ public final class Preferences implements Persistable {
maxPriceDistanceInPercent = 0.2;
try {
setTxFeePerKB(persisted.getTxFeePerKB());
setNonTradeTxFeePerKB(persisted.getNonTradeTxFeePerKB());
} catch (Exception e) {
// leave default value
}
@ -306,15 +306,15 @@ public final class Preferences implements Persistable {
}
}
public void setTxFeePerKB(long txFeePerKB) throws Exception {
if (txFeePerKB < Transaction.REFERENCE_DEFAULT_MIN_TX_FEE.value)
public void setNonTradeTxFeePerKB(long nonTradeTxFeePerKB) throws Exception {
if (nonTradeTxFeePerKB < Transaction.REFERENCE_DEFAULT_MIN_TX_FEE.value)
throw new Exception("Transaction fee must be at least 5 satoshi/byte");
if (txFeePerKB < Transaction.REFERENCE_DEFAULT_MIN_TX_FEE.value)
throw new Exception("Transaction fee must be at least 5 satoshi/byte");
if (nonTradeTxFeePerKB > 500_000)
throw new Exception("Transaction fee is in the range of 10-100 satoshi/byte. Your input is above any reasonable value (>500 satoshi/byte).");
this.txFeePerKB = txFeePerKB;
FeePolicy.setFeePerKb(Coin.valueOf(txFeePerKB));
this.nonTradeTxFeePerKB = nonTradeTxFeePerKB;
FeePolicy.setNonTradeFeePerKb(Coin.valueOf(nonTradeTxFeePerKB));
storage.queueUpForSave();
}
@ -435,8 +435,8 @@ public final class Preferences implements Persistable {
return preferredTradeCurrency;
}
public long getTxFeePerKB() {
return Math.max(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE.value, txFeePerKB);
public long getNonTradeTxFeePerKB() {
return Math.max(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE.value, nonTradeTxFeePerKB);
}
public boolean getUseTorForBitcoinJ() {