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Remove cent rule from fee solving in Wallet and payment channels.

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This commit sadly disables WalletTest.basicCategoryStepTest() because that test is not maintainable and
doesn't work any more. Hopefully we will rewrite fee solving together with a better set of unit tests.
This commit is contained in:
Andreas Schildbach
2016-03-07 17:12:03 +01:00
parent 53d2d5625c
commit e48ced6de3
6 changed files with 48 additions and 83 deletions
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26
core/src/main/java/org/bitcoinj/core/Wallet.java
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@@ -4132,26 +4132,18 @@ public class Wallet extends BaseTaggableObject
value = value.subtract(totalInput);
List<TransactionInput> originalInputs = new ArrayList<TransactionInput>(req.tx.getInputs());
int opReturnCount = 0;
// We need to know if we need to add an additional fee because one of our values are smaller than 0.01 BTC
boolean needAtLeastReferenceFee = false;
// Check for dusty sends and the OP_RETURN limit.
if (req.ensureMinRequiredFee && !req.emptyWallet) { // Min fee checking is handled later for emptyWallet.
int opReturnCount = 0;
for (TransactionOutput output : req.tx.getOutputs()) {
if (output.getValue().compareTo(Coin.CENT) < 0) {
needAtLeastReferenceFee = true;
if (output.isDust())
throw new DustySendRequested();
if (output.getScriptPubKey().isOpReturn())
++opReturnCount;
else
break;
}
if (output.isDust())
throw new DustySendRequested();
if (output.getScriptPubKey().isOpReturn())
++opReturnCount;
}
}
if (opReturnCount > 1) { // Only 1 OP_RETURN per transaction allowed.
throw new MultipleOpReturnRequested();
if (opReturnCount > 1) // Only 1 OP_RETURN per transaction allowed.
throw new MultipleOpReturnRequested();
}
// Calculate a list of ALL potential candidates for spending and then ask a coin selector to provide us
@@ -4164,7 +4156,7 @@ public class Wallet extends BaseTaggableObject
TransactionOutput bestChangeOutput = null;
if (!req.emptyWallet) {
// This can throw InsufficientMoneyException.
FeeCalculation feeCalculation = calculateFee(req, value, originalInputs, needAtLeastReferenceFee, candidates);
FeeCalculation feeCalculation = calculateFee(req, value, originalInputs, req.ensureMinRequiredFee, candidates);
bestCoinSelection = feeCalculation.bestCoinSelection;
bestChangeOutput = feeCalculation.bestChangeOutput;
} else {

1
core/src/main/java/org/bitcoinj/protocols/channels/PaymentChannelClientState.java
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@@ -132,7 +132,6 @@ public abstract class PaymentChannelClientState {
* @param myKey a freshly generated private key for this channel.
* @param serverKey a public key retrieved from the server used for the initial multisig contract
* @param value how many satoshis to put into this contract. If the channel reaches this limit, it must be closed.
* It is suggested you use at least {@link Coin#CENT} to avoid paying fees if you need to spend the refund transaction
* @param expiryTimeInSeconds At what point (UNIX timestamp +/- a few hours) the channel will expire
*
* @throws VerificationException If either myKey's pubkey or serverKey's pubkey are non-canonical (ie invalid)

3
core/src/main/java/org/bitcoinj/protocols/channels/PaymentChannelV1ClientState.java
View File

@@ -77,7 +77,6 @@ public class PaymentChannelV1ClientState extends PaymentChannelClientState {
* @param myKey a freshly generated private key for this channel.
* @param serverMultisigKey a public key retrieved from the server used for the initial multisig contract
* @param value how many satoshis to put into this contract. If the channel reaches this limit, it must be closed.
* It is suggested you use at least {@link Coin#CENT} to avoid paying fees if you need to spend the refund transaction
* @param expiryTimeInSeconds At what point (UNIX timestamp +/- a few hours) the channel will expire
*
* @throws VerificationException If either myKey's pubkey or serverKey's pubkey are non-canonical (ie invalid)
@@ -155,7 +154,7 @@ public class PaymentChannelV1ClientState extends PaymentChannelClientState {
// by using this sequence value, we avoid extra full replace-by-fee and relative lock time processing.
refundTx.addInput(multisigOutput).setSequenceNumber(TransactionInput.NO_SEQUENCE - 1L);
refundTx.setLockTime(expiryTime);
if (totalValue.compareTo(Coin.CENT) < 0 && Context.get().isEnsureMinRequiredFee()) {
if (Context.get().isEnsureMinRequiredFee()) {
// Must pay min fee.
final Coin valueAfterFee = totalValue.subtract(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE);
if (Transaction.MIN_NONDUST_OUTPUT.compareTo(valueAfterFee) > 0)

2
core/src/main/java/org/bitcoinj/protocols/channels/PaymentChannelV2ClientState.java
View File

@@ -126,7 +126,7 @@ public class PaymentChannelV2ClientState extends PaymentChannelClientState {
// by using this sequence value, we avoid extra full replace-by-fee and relative lock time processing.
refundTx.addInput(contract.getOutput(0)).setSequenceNumber(TransactionInput.NO_SEQUENCE - 1L);
refundTx.setLockTime(expiryTime);
if (totalValue.compareTo(Coin.CENT) < 0 && Context.get().isEnsureMinRequiredFee()) {
if (Context.get().isEnsureMinRequiredFee()) {
// Must pay min fee.
final Coin valueAfterFee = totalValue.subtract(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE);
if (Transaction.MIN_NONDUST_OUTPUT.compareTo(valueAfterFee) > 0)

73
core/src/test/java/org/bitcoinj/core/WalletTest.java
View File

@@ -48,6 +48,7 @@ import com.google.protobuf.ByteString;
import org.bitcoinj.wallet.Protos.Wallet.EncryptionType;
import org.junit.After;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
@@ -2219,7 +2220,7 @@ public class WalletTest extends TestWithWallet {
@Test(expected = Wallet.DustySendRequested.class)
public void sendDustAndMessageWithValueTest() throws Exception {
//Tests sending dust and OP_RETURN with value, should throw DustySendRequested
// Tests sending dust and OP_RETURN with value, should throw DustySendRequested
receiveATransaction(wallet, myAddress);
Transaction tx = new Transaction(PARAMS);
tx.addOutput(Coin.CENT, ScriptBuilder.createOpReturnScript("hello world!".getBytes()));
@@ -2275,23 +2276,16 @@ public class WalletTest extends TestWithWallet {
request1.ensureMinRequiredFee = true;
wallet.completeTx(request1);
Transaction spend1 = request1.tx;
assertEquals(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE, request1.tx.getFee());
assertEquals(2, spend1.getOutputs().size());
// But not at exactly 0.01
SendRequest request2 = SendRequest.to(OTHER_ADDRESS, CENT);
request2.ensureMinRequiredFee = true;
wallet.completeTx(request2);
Transaction spend2 = request2.tx;
assertEquals(2, spend2.getOutputs().size());
// ...but not more fee than what we request
SendRequest request3 = SendRequest.to(OTHER_ADDRESS, CENT.subtract(SATOSHI));
request3.feePerKb = Transaction.REFERENCE_DEFAULT_MIN_TX_FEE.add(SATOSHI);
request3.ensureMinRequiredFee = true;
wallet.completeTx(request3);
assertEquals(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE, request3.tx.getFee());
Transaction spend3 = request3.tx;
assertEquals(2, spend3.getOutputs().size());
assertEquals(2, request3.tx.getOutputs().size());
// ...unless we need it
SendRequest request4 = SendRequest.to(OTHER_ADDRESS, CENT.subtract(SATOSHI));
@@ -2299,72 +2293,54 @@ public class WalletTest extends TestWithWallet {
request4.ensureMinRequiredFee = true;
wallet.completeTx(request4);
assertEquals(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE, request4.tx.getFee());
Transaction spend4 = request4.tx;
assertEquals(2, spend4.getOutputs().size());
assertEquals(2, request4.tx.getOutputs().size());
// If we would have a change output < 0.01, it should add the fee
SendRequest request5 = SendRequest.to(OTHER_ADDRESS, Coin.COIN.subtract(CENT.subtract(SATOSHI)));
request5.ensureMinRequiredFee = true;
wallet.completeTx(request5);
assertEquals(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE, request5.tx.getFee());
Transaction spend5 = request5.tx;
// If we would have a change output < 0.01, it should add the fee
assertEquals(2, spend5.getOutputs().size());
SendRequest request6 = SendRequest.to(OTHER_ADDRESS, Coin.COIN.subtract(CENT));
request6.ensureMinRequiredFee = true;
wallet.completeTx(request6);
assertEquals(ZERO, request6.tx.getFee());
Transaction spend6 = request6.tx;
// ...but not if change output == 0.01
assertEquals(2, spend6.getOutputs().size());
assertEquals(2, request5.tx.getOutputs().size());
// If change is 0.1-satoshi and we already have a 0.1-satoshi output, fee should be reference fee
SendRequest request7 = SendRequest.to(OTHER_ADDRESS, Coin.COIN.subtract(CENT.subtract(SATOSHI.multiply(2)).multiply(2)));
request7.ensureMinRequiredFee = true;
request7.tx.addOutput(CENT.subtract(SATOSHI), OTHER_ADDRESS);
wallet.completeTx(request7);
assertEquals(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE, request7.tx.getFee());
Transaction spend7 = request7.tx;
// If change is 0.1-satoshi and we already have a 0.1-satoshi output, fee should be reference fee
assertEquals(3, spend7.getOutputs().size());
assertEquals(3, request7.tx.getOutputs().size());
// If we would have a change output == REFERENCE_DEFAULT_MIN_TX_FEE that would cause a fee, throw it away and make it fee
SendRequest request8 = SendRequest.to(OTHER_ADDRESS, COIN.subtract(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE));
request8.ensureMinRequiredFee = true;
wallet.completeTx(request8);
assertEquals(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE, request8.tx.getFee());
Transaction spend8 = request8.tx;
// If we would have a change output == REFERENCE_DEFAULT_MIN_TX_FEE that would cause a fee, throw it away and make it fee
assertEquals(1, spend8.getOutputs().size());
assertEquals(1, request8.tx.getOutputs().size());
// ...in fact, also add fee if we would get back less than MIN_NONDUST_OUTPUT
SendRequest request9 = SendRequest.to(OTHER_ADDRESS, COIN.subtract(
Transaction.REFERENCE_DEFAULT_MIN_TX_FEE.add(Transaction.MIN_NONDUST_OUTPUT).subtract(SATOSHI)));
request9.ensureMinRequiredFee = true;
wallet.completeTx(request9);
assertEquals(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE.add(Transaction.MIN_NONDUST_OUTPUT).subtract(SATOSHI), request9.tx.getFee());
Transaction spend9 = request9.tx;
// ...in fact, also add fee if we would get back less than MIN_NONDUST_OUTPUT
assertEquals(1, spend9.getOutputs().size());
assertEquals(1, request9.tx.getOutputs().size());
// ...but if we get back any more than that, we should get a refund (but still pay fee)
SendRequest request10 = SendRequest.to(OTHER_ADDRESS, COIN.subtract(
Transaction.REFERENCE_DEFAULT_MIN_TX_FEE.add(Transaction.MIN_NONDUST_OUTPUT)));
request10.ensureMinRequiredFee = true;
wallet.completeTx(request10);
assertEquals(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE, request10.tx.getFee());
Transaction spend10 = request10.tx;
// ...but if we get back any more than that, we should get a refund (but still pay fee)
assertEquals(2, spend10.getOutputs().size());
assertEquals(2, request10.tx.getOutputs().size());
// ...of course fee should be min(request.fee, MIN_TX_FEE) so we should get MIN_TX_FEE.add(SATOSHI) here
SendRequest request11 = SendRequest.to(OTHER_ADDRESS, COIN.subtract(
Transaction.REFERENCE_DEFAULT_MIN_TX_FEE.add(Transaction.MIN_NONDUST_OUTPUT).add(SATOSHI.multiply(2))));
request11.feePerKb = Transaction.REFERENCE_DEFAULT_MIN_TX_FEE.add(SATOSHI);
request11.ensureMinRequiredFee = true;
wallet.completeTx(request11);
assertEquals(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE, request11.tx.getFee());
Transaction spend11 = request11.tx;
// ...of course fee should be min(request.fee, MIN_TX_FEE) so we should get MIN_TX_FEE.add(SATOSHI) here
assertEquals(2, spend11.getOutputs().size());
// Remove the coin from our wallet
wallet.commitTx(spend11);
assertEquals(2, request11.tx.getOutputs().size());
}
@Test
@@ -2441,6 +2417,7 @@ public class WalletTest extends TestWithWallet {
assertEquals(1, spend15.getInputs().size());
assertEquals(COIN, spend15.getInput(0).getValue());
// Test ensureMinRequiredFee
SendRequest request16 = SendRequest.to(OTHER_ADDRESS, CENT);
request16.feePerKb = ZERO;
request16.ensureMinRequiredFee = true;
@@ -2448,8 +2425,8 @@ public class WalletTest extends TestWithWallet {
request16.tx.addOutput(CENT, OTHER_ADDRESS);
assertTrue(request16.tx.unsafeBitcoinSerialize().length > 1000);
wallet.completeTx(request16);
// Of course the fee shouldn't be added if feePerKb == 0
assertEquals(ZERO, request16.tx.getFee());
// Just the reference fee should be added if feePerKb == 0
assertEquals(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE, request16.tx.getFee());
Transaction spend16 = request16.tx;
assertEquals(31, spend16.getOutputs().size());
// We optimize for priority, so the output selected should be the largest one
@@ -2512,18 +2489,16 @@ public class WalletTest extends TestWithWallet {
assertEquals(wallet.getBalance(), CENT.add(COIN));
SendRequest request19 = SendRequest.to(OTHER_ADDRESS, CENT);
request19.feePerKb = ZERO;
request19.ensureMinRequiredFee = true;
for (int i = 0; i < 99; i++)
request19.tx.addOutput(CENT, OTHER_ADDRESS);
// If we send now, we shouldn't need a fee and should only have to spend our COIN
// If we send now, we should only have to spend our COIN
wallet.completeTx(request19);
assertEquals(ZERO, request19.tx.getFee());
assertEquals(Coin.ZERO, request19.tx.getFee());
assertEquals(1, request19.tx.getInputs().size());
assertEquals(100, request19.tx.getOutputs().size());
// Now reset request19 and give it a fee per kb
request19.tx.clearInputs();
request19 = SendRequest.forTx(request19.tx);
request19.ensureMinRequiredFee = true;
request19.feePerKb = Transaction.DEFAULT_TX_FEE;
request19.shuffleOutputs = false;
wallet.completeTx(request19);
@@ -2535,7 +2510,6 @@ public class WalletTest extends TestWithWallet {
// Create another transaction that will spend COIN + fee, which makes it require both inputs
SendRequest request20 = SendRequest.to(OTHER_ADDRESS, CENT);
request20.feePerKb = ZERO;
request20.ensureMinRequiredFee = true;
for (int i = 0; i < 99; i++)
request20.tx.addOutput(CENT, OTHER_ADDRESS);
// If we send now, we shouldn't have a fee and should only have to spend our COIN
@@ -2570,10 +2544,8 @@ public class WalletTest extends TestWithWallet {
assertEquals(CENT, request21.tx.getInput(1).getValue());
// Test feePerKb when we aren't using ensureMinRequiredFee
// Same as request 19
SendRequest request25 = SendRequest.to(OTHER_ADDRESS, CENT);
request25.feePerKb = ZERO;
request25.ensureMinRequiredFee = true;
for (int i = 0; i < 70; i++)
request25.tx.addOutput(CENT, OTHER_ADDRESS);
// If we send now, we shouldn't need a fee and should only have to spend our COIN
@@ -2623,6 +2595,7 @@ public class WalletTest extends TestWithWallet {
}
@Test
@Ignore("disabled for now as this test is not maintainable")
public void basicCategoryStepTest() throws Exception {
// Creates spends that step through the possible fee solver categories

26
core/src/test/java/org/bitcoinj/protocols/channels/PaymentChannelStateTest.java
View File

@@ -17,6 +17,7 @@
package org.bitcoinj.protocols.channels;
import org.bitcoinj.core.*;
import org.bitcoinj.core.Wallet.SendRequest;
import org.bitcoinj.script.Script;
import org.bitcoinj.script.ScriptBuilder;
import org.bitcoinj.testing.TestWithWallet;
@@ -88,7 +89,7 @@ public class PaymentChannelStateTest extends TestWithWallet {
public void setUp() throws Exception {
Utils.setMockClock(); // Use mock clock
super.setUp();
Context.propagate(new Context(PARAMS, 100, Coin.ZERO, true));
Context.propagate(new Context(PARAMS, 100, Coin.ZERO, false));
wallet.addExtension(new StoredPaymentChannelClientStates(wallet, new TransactionBroadcaster() {
@Override
public TransactionBroadcast broadcastTransaction(Transaction tx) {
@@ -357,8 +358,6 @@ public class PaymentChannelStateTest extends TestWithWallet {
assertEquals(PaymentChannelClientState.State.NEW, clientState.getState());
assertEquals(CENT.divide(2), clientState.getTotalValue());
clientState.initiate();
// We will have to pay min_tx_fee twice - both the multisig contract and the refund tx
assertEquals(clientState.getRefundTxFees(), Transaction.REFERENCE_DEFAULT_MIN_TX_FEE.multiply(2));
assertEquals(getInitialClientState(), clientState.getState());
if (useRefunds()) {
@@ -442,7 +441,7 @@ public class PaymentChannelStateTest extends TestWithWallet {
chain.add(makeSolvedTestBlock(blockStore.getChainHead().getHeader(), multisigContract,clientBroadcastedRefund));
// Make sure we actually had to pay what initialize() told us we would
assertEquals(wallet.getBalance(), CENT.subtract(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE.multiply(2)));
assertEquals(CENT, wallet.getBalance());
try {
// After its expired, we cant still increment payment
@@ -687,13 +686,17 @@ public class PaymentChannelStateTest extends TestWithWallet {
@Test
public void feesTest() throws Exception {
// Test that transactions are getting the necessary fees
Context.propagate(new Context(PARAMS, 100, Coin.ZERO, true));
// Spend the client wallet's one coin
wallet.sendCoinsOffline(Wallet.SendRequest.to(new ECKey().toAddress(PARAMS), COIN));
final SendRequest request = Wallet.SendRequest.to(new ECKey().toAddress(PARAMS), COIN);
request.ensureMinRequiredFee = false;
wallet.sendCoinsOffline(request);
assertEquals(Coin.ZERO, wallet.getBalance());
chain.add(makeSolvedTestBlock(blockStore.getChainHead().getHeader(), createFakeTx(PARAMS, CENT, myAddress)));
assertEquals(CENT, wallet.getBalance());
chain.add(makeSolvedTestBlock(blockStore.getChainHead().getHeader(),
createFakeTx(PARAMS, CENT.add(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE), myAddress)));
assertEquals(CENT.add(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE), wallet.getBalance());
Utils.setMockClock(); // Use mock clock
final long EXPIRE_TIME = Utils.currentTimeMillis()/1000 + 60*60*24;
@@ -724,14 +727,14 @@ public class PaymentChannelStateTest extends TestWithWallet {
assertEquals(PaymentChannelClientState.State.NEW, clientState.getState());
// We'll have to pay REFERENCE_DEFAULT_MIN_TX_FEE twice (multisig+refund), and we'll end up getting back nearly nothing...
clientState.initiate();
assertEquals(clientState.getRefundTxFees(), Transaction.REFERENCE_DEFAULT_MIN_TX_FEE.multiply(2));
assertEquals(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE.multiply(2), clientState.getRefundTxFees());
assertEquals(getInitialClientState(), clientState.getState());
// Now actually use a more useful CENT
clientState = makeClientState(wallet, myKey, ECKey.fromPublicOnly(serverKey.getPubKey()), CENT, EXPIRE_TIME);
assertEquals(PaymentChannelClientState.State.NEW, clientState.getState());
clientState.initiate();
assertEquals(clientState.getRefundTxFees(), Coin.ZERO);
assertEquals(Transaction.REFERENCE_DEFAULT_MIN_TX_FEE.multiply(2), clientState.getRefundTxFees());
assertEquals(getInitialClientState(), clientState.getState());
if (useRefunds()) {
@@ -802,6 +805,7 @@ public class PaymentChannelStateTest extends TestWithWallet {
@Test
public void serverAddsFeeTest() throws Exception {
// Test that the server properly adds the necessary fee at the end (or just drops the payment if its not worth it)
Context.propagate(new Context(PARAMS, 100, Coin.ZERO, true));
Utils.setMockClock(); // Use mock clock
final long EXPIRE_TIME = Utils.currentTimeMillis()/1000 + 60*60*24;
@@ -882,9 +886,7 @@ public class PaymentChannelStateTest extends TestWithWallet {
}
// Now give the server enough coins to pay the fee
StoredBlock block = new StoredBlock(makeSolvedTestBlock(blockStore, new ECKey().toAddress(PARAMS)), BigInteger.ONE, 1);
Transaction tx1 = createFakeTx(PARAMS, COIN, serverKey.toAddress(PARAMS));
serverWallet.receiveFromBlock(tx1, block, AbstractBlockChain.NewBlockType.BEST_CHAIN, 0);
sendMoneyToWallet(serverWallet, AbstractBlockChain.NewBlockType.BEST_CHAIN, COIN, serverKey.toAddress(PARAMS));
// The contract is still not worth redeeming - its worth less than we pay in fee
try {