func TestOutputSplittingOversizeTx(t *testing.T) {
tearDown, pool, _ := TstCreatePoolAndTxStore(t)
defer tearDown()
requestAmount := dcrutil.Amount(5)
bigInput := int64(3)
smallInput := int64(2)
request := TstNewOutputRequest(
t, 1, "34eVkREKgvvGASZW7hkgE2uNc1yycntMK6", requestAmount, pool.Manager().ChainParams())
seriesID, eligible := TstCreateCreditsOnNewSeries(t, pool, []int64{smallInput, bigInput})
changeStart := TstNewChangeAddress(t, pool, seriesID, 0)
w := newWithdrawal(0, []OutputRequest{request}, eligible, *changeStart)
w.txOptions = func(tx *withdrawalTx) {
tx.calculateFee = TstConstantFee(0)
tx.calculateSize = func() int {
// Trigger an output split right after the second input is added.
if len(tx.inputs) == 2 {
return txMaxSize + 1
}
return txMaxSize - 1
}
}
if err := w.fulfillRequests(); err != nil {
t.Fatal(err)
}
if len(w.transactions) != 2 {
t.Fatalf("Wrong number of finalized transactions; got %d, want 2", len(w.transactions))
}
tx1 := w.transactions[0]
if len(tx1.outputs) != 1 {
t.Fatalf("Wrong number of outputs on tx1; got %d, want 1", len(tx1.outputs))
}
if tx1.outputs[0].amount != dcrutil.Amount(bigInput) {
t.Fatalf("Wrong amount for output in tx1; got %d, want %d", tx1.outputs[0].amount,
bigInput)
}
tx2 := w.transactions[1]
if len(tx2.outputs) != 1 {
t.Fatalf("Wrong number of outputs on tx2; got %d, want 1", len(tx2.outputs))
}
if tx2.outputs[0].amount != dcrutil.Amount(smallInput) {
t.Fatalf("Wrong amount for output in tx2; got %d, want %d", tx2.outputs[0].amount,
smallInput)
}
if len(w.status.outputs) != 1 {
t.Fatalf("Wrong number of output statuses; got %d, want 1", len(w.status.outputs))
}
status := w.status.outputs[request.outBailmentID()].status
if status != statusSplit {
t.Fatalf("Wrong output status; got '%s', want '%s'", status, statusSplit)
}
}
func TestWithdrawalTxInputTotal(t *testing.T) {
tearDown, pool, _ := TstCreatePoolAndTxStore(t)
defer tearDown()
tx := createWithdrawalTx(t, pool, []int64{5}, []int64{})
if tx.inputTotal() != dcrutil.Amount(5) {
t.Fatalf("Wrong total output; got %v, want %v", tx.outputTotal(), dcrutil.Amount(5))
}
}
func TestStoreTransactionsWithChangeOutput(t *testing.T) {
tearDown, pool, store := TstCreatePoolAndTxStore(t)
defer tearDown()
wtx := createWithdrawalTxWithStoreCredits(t, store, pool, []int64{5e6}, []int64{1e6, 1e6})
wtx.changeOutput = wire.NewTxOut(int64(3e6), []byte{})
msgtx := wtx.toMsgTx()
tx := &changeAwareTx{MsgTx: msgtx, changeIdx: int32(len(msgtx.TxOut) - 1)}
if err := storeTransactions(store, []*changeAwareTx{tx}); err != nil {
t.Fatal(err)
}
sha := msgtx.TxSha()
txDetails, err := store.TxDetails(&sha)
if err != nil {
t.Fatal(err)
}
if txDetails == nil {
t.Fatal("The new tx doesn't seem to have been stored")
}
storedTx := txDetails.TxRecord.MsgTx
outputTotal := int64(0)
for i, txOut := range storedTx.TxOut {
if int32(i) != tx.changeIdx {
outputTotal += txOut.Value
}
}
if outputTotal != int64(2e6) {
t.Fatalf("Unexpected output amount; got %v, want %v", outputTotal, int64(2e6))
}
inputTotal := dcrutil.Amount(0)
for _, debit := range txDetails.Debits {
inputTotal += debit.Amount
}
if inputTotal != dcrutil.Amount(5e6) {
t.Fatalf("Unexpected input amount; got %v, want %v", inputTotal, dcrutil.Amount(5e6))
}
credits, err := store.UnspentOutputs()
if err != nil {
t.Fatal(err)
}
if len(credits) != 1 {
t.Fatalf("Unexpected number of credits in txstore; got %d, want 1", len(credits))
}
changeOutpoint := wire.OutPoint{Hash: sha, Index: uint32(tx.changeIdx)}
if credits[0].OutPoint != changeOutpoint {
t.Fatalf("Credit's outpoint (%v) doesn't match the one from change output (%v)",
credits[0].OutPoint, changeOutpoint)
}
}
func TestWithdrawalTxOutputTotal(t *testing.T) {
tearDown, pool, _ := TstCreatePoolAndTxStore(t)
defer tearDown()
tx := createWithdrawalTx(t, pool, []int64{}, []int64{4})
tx.changeOutput = wire.NewTxOut(int64(1), []byte{})
if tx.outputTotal() != dcrutil.Amount(4) {
t.Fatalf("Wrong total output; got %v, want %v", tx.outputTotal(), dcrutil.Amount(4))
}
}
func (s *walletServer) FundTransaction(ctx context.Context, req *pb.FundTransactionRequest) (
*pb.FundTransactionResponse, error) {
policy := wallet.OutputSelectionPolicy{
Account: req.Account,
RequiredConfirmations: req.RequiredConfirmations,
}
unspentOutputs, err := s.wallet.UnspentOutputs(policy)
if err != nil {
return nil, translateError(err)
}
selectedOutputs := make([]*pb.FundTransactionResponse_PreviousOutput, 0, len(unspentOutputs))
var totalAmount dcrutil.Amount
for _, output := range unspentOutputs {
selectedOutputs = append(selectedOutputs, &pb.FundTransactionResponse_PreviousOutput{
TransactionHash: output.OutPoint.Hash[:],
OutputIndex: output.OutPoint.Index,
Amount: output.Output.Value,
PkScript: output.Output.PkScript,
ReceiveTime: output.ReceiveTime.Unix(),
FromCoinbase: output.OutputKind == wallet.OutputKindCoinbase,
Tree: int32(output.OutPoint.Tree),
})
totalAmount += dcrutil.Amount(output.Output.Value)
if req.TargetAmount != 0 && totalAmount > dcrutil.Amount(req.TargetAmount) {
break
}
}
var changeScript []byte
if req.IncludeChangeScript && totalAmount > dcrutil.Amount(req.TargetAmount) {
changeAddr, err := s.wallet.NewAddress(req.Account,
waddrmgr.InternalBranch)
if err != nil {
return nil, translateError(err)
}
changeScript, err = txscript.PayToAddrScript(changeAddr)
if err != nil {
return nil, translateError(err)
}
}
return &pb.FundTransactionResponse{
SelectedOutputs: selectedOutputs,
TotalAmount: int64(totalAmount),
ChangePkScript: changeScript,
}, nil
}
// TestRollbackLastOutputWhenNewOutputAdded checks that we roll back the last
// output if a tx becomes too big right after we add a new output to it.
func TestRollbackLastOutputWhenNewOutputAdded(t *testing.T) {
tearDown, pool, _ := TstCreatePoolAndTxStore(t)
defer tearDown()
net := pool.Manager().ChainParams()
series, eligible := TstCreateCreditsOnNewSeries(t, pool, []int64{5, 5})
requests := []OutputRequest{
// This is ordered by bailment ID
TstNewOutputRequest(t, 1, "34eVkREKgvvGASZW7hkgE2uNc1yycntMK6", 1, net),
TstNewOutputRequest(t, 2, "3PbExiaztsSYgh6zeMswC49hLUwhTQ86XG", 2, net),
}
changeStart := TstNewChangeAddress(t, pool, series, 0)
w := newWithdrawal(0, requests, eligible, *changeStart)
w.txOptions = func(tx *withdrawalTx) {
tx.calculateFee = TstConstantFee(0)
tx.calculateSize = func() int {
// Trigger an output split right after the second output is added.
if len(tx.outputs) > 1 {
return txMaxSize + 1
}
return txMaxSize - 1
}
}
if err := w.fulfillRequests(); err != nil {
t.Fatal("Unexpected error:", err)
}
// At this point we should have two finalized transactions.
if len(w.transactions) != 2 {
t.Fatalf("Wrong number of finalized transactions; got %d, want 2", len(w.transactions))
}
// First tx should have one output with 1 and one change output with 4
// atoms.
firstTx := w.transactions[0]
req1 := requests[0]
checkTxOutputs(t, firstTx,
[]*withdrawalTxOut{&withdrawalTxOut{request: req1, amount: req1.Amount}})
checkTxChangeAmount(t, firstTx, dcrutil.Amount(4))
// Second tx should have one output with 2 and one changeoutput with 3 atomss.
secondTx := w.transactions[1]
req2 := requests[1]
checkTxOutputs(t, secondTx,
[]*withdrawalTxOut{&withdrawalTxOut{request: req2, amount: req2.Amount}})
checkTxChangeAmount(t, secondTx, dcrutil.Amount(3))
}
func ExampleAmount() {
a := dcrutil.Amount(0)
fmt.Println("Zero Atom:", a)
a = dcrutil.Amount(1e8)
fmt.Println("100,000,000 Atoms:", a)
a = dcrutil.Amount(1e5)
fmt.Println("100,000 Atoms:", a)
// Output:
// Zero Atom: 0 Coin
// 100,000,000 Atoms: 1 Coin
// 100,000 Atoms: 0.001 Coin
}
// Check that some requested outputs are not fulfilled when we don't have credits for all
// of them.
func TestFulfillRequestsNotEnoughCreditsForAllRequests(t *testing.T) {
tearDown, pool, _ := TstCreatePoolAndTxStore(t)
defer tearDown()
net := pool.Manager().ChainParams()
// Create eligible inputs and the list of outputs we need to fulfil.
seriesID, eligible := TstCreateCreditsOnNewSeries(t, pool, []int64{2e6, 4e6})
out1 := TstNewOutputRequest(
t, 1, "34eVkREKgvvGASZW7hkgE2uNc1yycntMK6", dcrutil.Amount(3e6), net)
out2 := TstNewOutputRequest(
t, 2, "3PbExiaztsSYgh6zeMswC49hLUwhTQ86XG", dcrutil.Amount(2e6), net)
out3 := TstNewOutputRequest(
t, 3, "3Qt1EaKRD9g9FeL2DGkLLswhK1AKmmXFSe", dcrutil.Amount(5e6), net)
outputs := []OutputRequest{out1, out2, out3}
changeStart := TstNewChangeAddress(t, pool, seriesID, 0)
w := newWithdrawal(0, outputs, eligible, *changeStart)
if err := w.fulfillRequests(); err != nil {
t.Fatal(err)
}
tx := w.transactions[0]
// The created tx should spend both eligible credits, so we expect it to have
// an input amount of 2e6+4e6 atoms.
inputAmount := eligible[0].Amount + eligible[1].Amount
// We expect it to include outputs for requests 1 and 2, plus a change output, but
// output request #3 should not be there because we don't have enough credits.
change := inputAmount - (out1.Amount + out2.Amount + tx.calculateFee())
expectedOutputs := []OutputRequest{out1, out2}
sort.Sort(byOutBailmentID(expectedOutputs))
expectedOutputs = append(
expectedOutputs, TstNewOutputRequest(t, 4, changeStart.addr.String(), change, net))
msgtx := tx.toMsgTx()
checkMsgTxOutputs(t, msgtx, expectedOutputs)
// withdrawal.status should state that outputs 1 and 2 were successfully fulfilled,
// and that output 3 was not.
expectedStatuses := map[OutBailmentID]outputStatus{
out1.outBailmentID(): statusSuccess,
out2.outBailmentID(): statusSuccess,
out3.outBailmentID(): statusPartial}
for _, wOutput := range w.status.outputs {
if wOutput.status != expectedStatuses[wOutput.request.outBailmentID()] {
t.Fatalf("Unexpected status for %v; got '%s', want '%s'", wOutput.request,
wOutput.status, expectedStatuses[wOutput.request.outBailmentID()])
}
}
}
// TstCreateCreditsOnStore inserts a new credit in the given store for
// every item in the amounts slice.
func TstCreateCreditsOnStore(t *testing.T, s *wtxmgr.Store, pkScript []byte,
amounts []int64) []wtxmgr.Credit {
msgTx := createMsgTx(pkScript, amounts)
meta := &wtxmgr.BlockMeta{
Block: wtxmgr.Block{Height: TstInputsBlock},
}
rec, err := wtxmgr.NewTxRecordFromMsgTx(msgTx, time.Now())
if err != nil {
t.Fatal(err)
}
if err := s.InsertTx(rec, meta); err != nil {
t.Fatal("Failed to create inputs: ", err)
}
credits := make([]wtxmgr.Credit, len(msgTx.TxOut))
for i := range msgTx.TxOut {
if err := s.AddCredit(rec, meta, uint32(i), false); err != nil {
t.Fatal("Failed to create inputs: ", err)
}
credits[i] = wtxmgr.Credit{
OutPoint: wire.OutPoint{
Hash: rec.Hash,
Index: uint32(i),
},
BlockMeta: *meta,
Amount: dcrutil.Amount(msgTx.TxOut[i].Value),
PkScript: msgTx.TxOut[i].PkScript,
}
}
return credits
}
func makeInputSource(unspents []*wire.TxOut) InputSource {
// Return outputs in order.
currentTotal := dcrutil.Amount(0)
currentInputs := make([]*wire.TxIn, 0, len(unspents))
f := func(target dcrutil.Amount) (dcrutil.Amount, []*wire.TxIn, [][]byte, error) {
for currentTotal < target && len(unspents) != 0 {
u := unspents[0]
unspents = unspents[1:]
nextInput := wire.NewTxIn(&wire.OutPoint{}, nil)
currentTotal += dcrutil.Amount(u.Value)
currentInputs = append(currentInputs, nextInput)
}
return currentTotal, currentInputs, make([][]byte, len(currentInputs)), nil
}
return InputSource(f)
}
// parseAccountBalanceNtfnParams parses out the account name, total balance,
// and whether or not the balance is confirmed or unconfirmed from the
// parameters of an accountbalance notification.
func parseAccountBalanceNtfnParams(params []json.RawMessage) (account string,
balance dcrutil.Amount, confirmed bool, err error) {
if len(params) != 3 {
return "", 0, false, wrongNumParams(len(params))
}
// Unmarshal first parameter as a string.
err = json.Unmarshal(params[0], &account)
if err != nil {
return "", 0, false, err
}
// Unmarshal second parameter as a floating point number.
var fbal float64
err = json.Unmarshal(params[1], &fbal)
if err != nil {
return "", 0, false, err
}
// Unmarshal third parameter as a boolean.
err = json.Unmarshal(params[2], &confirmed)
if err != nil {
return "", 0, false, err
}
// Bounds check amount.
bal, err := dcrutil.NewAmount(fbal)
if err != nil {
return "", 0, false, err
}
return account, dcrutil.Amount(bal), confirmed, nil
}
// parseTicketPurchasedNtfnParams parses out the ticket hash and amount
// from a recent ticket purchase in the wallet.
func parseTicketPurchasedNtfnParams(params []json.RawMessage) (txHash *chainhash.Hash,
amount dcrutil.Amount, err error) {
if len(params) != 2 {
return nil, 0, wrongNumParams(len(params))
}
// Unmarshal first parameter as a string and convert to hash.
var th string
err = json.Unmarshal(params[0], &th)
if err != nil {
return nil, 0, err
}
thHash, err := chainhash.NewHashFromStr(th)
if err != nil {
return nil, 0, err
}
// Unmarshal second parameter as an int64.
var amt int64
err = json.Unmarshal(params[1], &amt)
if err != nil {
return nil, 0, err
}
return thHash, dcrutil.Amount(amt), nil
}
// mockCredits decodes the given txHex and returns the outputs with
// the given indices as eligible inputs.
func mockCredits(t *testing.T, txHex string, indices []uint32) []wtxmgr.Credit {
serialized, err := hex.DecodeString(txHex)
if err != nil {
t.Fatal(err)
}
utx, err := dcrutil.NewTxFromBytes(serialized)
if err != nil {
t.Fatal(err)
}
tx := utx.MsgTx()
isCB := blockchain.IsCoinBaseTx(tx)
now := time.Now()
eligible := make([]wtxmgr.Credit, len(indices))
c := wtxmgr.Credit{
OutPoint: wire.OutPoint{Hash: *utx.Sha()},
BlockMeta: wtxmgr.BlockMeta{
Block: wtxmgr.Block{Height: -1},
},
}
for i, idx := range indices {
c.OutPoint.Index = idx
c.Amount = dcrutil.Amount(tx.TxOut[idx].Value)
c.PkScript = tx.TxOut[idx].PkScript
c.Received = now
c.FromCoinBase = isCB
eligible[i] = c
}
return eligible
}
func TestFindingSpentCredits(t *testing.T) {
t.Parallel()
s, teardown, err := testStore()
defer teardown()
if err != nil {
t.Fatal(err)
}
// Insert transaction and credit which will be spent.
recvRec, err := NewTxRecord(TstRecvSerializedTx, time.Now())
if err != nil {
t.Fatal(err)
}
err = s.InsertTx(recvRec, TstRecvTxBlockDetails)
if err != nil {
t.Fatal(err)
}
defaultAccount := uint32(0)
err = s.AddCredit(recvRec, TstRecvTxBlockDetails, 1, false, defaultAccount)
if err != nil {
t.Fatal(err)
}
// Insert confirmed transaction which spends the above credit.
spendingRec, err := NewTxRecord(TstSpendingSerializedTx, time.Now())
if err != nil {
t.Fatal(err)
}
err = s.InsertTx(spendingRec, TstSignedTxBlockDetails)
if err != nil {
t.Fatal(err)
}
err = s.AddCredit(spendingRec, TstSignedTxBlockDetails, 0, false, defaultAccount)
if err != nil {
t.Fatal(err)
}
bal, err := s.Balance(1, TstSignedTxBlockDetails.Height, wtxmgr.BFBalanceLockedStake, true, defaultAccount)
if err != nil {
t.Fatal(err)
}
expectedBal := dcrutil.Amount(TstSpendingTx.MsgTx().TxOut[0].Value)
if bal != expectedBal {
t.Fatalf("bad balance: %v != %v", bal, expectedBal)
}
unspents, err := s.UnspentOutputs()
if err != nil {
t.Fatal(err)
}
op := wire.NewOutPoint(TstSpendingTx.Sha(), 0, dcrutil.TxTreeStake)
if unspents[0].OutPoint != *op {
t.Fatal("unspent outpoint doesn't match expected")
}
if len(unspents) > 1 {
t.Fatal("has more than one unspent credit")
}
}
func createAndFulfillWithdrawalRequests(t *testing.T, pool *Pool, roundID uint32) withdrawalInfo {
params := pool.Manager().ChainParams()
seriesID, eligible := TstCreateCreditsOnNewSeries(t, pool, []int64{2e6, 4e6})
requests := []OutputRequest{
TstNewOutputRequest(t, 1, "TsaEqDBJf63vJnqULb892wwwwPBTURUuuvn", 3e6, params),
TstNewOutputRequest(t, 2, "Tsk7JZPtyeQHuNsSZ2K5Q8apJBusEzNtWPk", 2e6, params),
}
changeStart := TstNewChangeAddress(t, pool, seriesID, 0)
dustThreshold := dcrutil.Amount(1e4)
startAddr := TstNewWithdrawalAddress(t, pool, seriesID, 1, 0)
lastSeriesID := seriesID
w := newWithdrawal(roundID, requests, eligible, *changeStart)
if err := w.fulfillRequests(); err != nil {
t.Fatal(err)
}
return withdrawalInfo{
requests: requests,
startAddress: *startAddr,
changeStart: *changeStart,
lastSeriesID: lastSeriesID,
dustThreshold: dustThreshold,
status: *w.status,
}
}
// Check that withdrawal.status correctly states that no outputs were fulfilled when we
// don't have enough eligible credits for any of them.
func TestFulfillRequestsNoSatisfiableOutputs(t *testing.T) {
tearDown, pool, _ := TstCreatePoolAndTxStore(t)
defer tearDown()
seriesID, eligible := TstCreateCreditsOnNewSeries(t, pool, []int64{1e6})
request := TstNewOutputRequest(
t, 1, "3Qt1EaKRD9g9FeL2DGkLLswhK1AKmmXFSe", dcrutil.Amount(3e6), pool.Manager().ChainParams())
changeStart := TstNewChangeAddress(t, pool, seriesID, 0)
w := newWithdrawal(0, []OutputRequest{request}, eligible, *changeStart)
if err := w.fulfillRequests(); err != nil {
t.Fatal(err)
}
if len(w.transactions) != 0 {
t.Fatalf("Unexpected number of transactions; got %d, want 0", len(w.transactions))
}
if len(w.status.outputs) != 1 {
t.Fatalf("Unexpected number of outputs in WithdrawalStatus; got %d, want 1",
len(w.status.outputs))
}
status := w.status.outputs[request.outBailmentID()].status
if status != statusPartial {
t.Fatalf("Unexpected status for requested outputs; got '%s', want '%s'",
status, statusPartial)
}
}
// parseTxAcceptedNtfnParams parses out the transaction hash and total amount
// from the parameters of a txaccepted notification.
func parseTxAcceptedNtfnParams(params []json.RawMessage) (*chainhash.Hash,
dcrutil.Amount, error) {
if len(params) != 2 {
return nil, 0, wrongNumParams(len(params))
}
// Unmarshal first parameter as a string.
var txHashStr string
err := json.Unmarshal(params[0], &txHashStr)
if err != nil {
return nil, 0, err
}
// Unmarshal second parameter as a floating point number.
var famt float64
err = json.Unmarshal(params[1], &famt)
if err != nil {
return nil, 0, err
}
// Bounds check amount.
amt, err := dcrutil.NewAmount(famt)
if err != nil {
return nil, 0, err
}
// Decode string encoding of transaction sha.
txHash, err := chainhash.NewHashFromStr(txHashStr)
if err != nil {
return nil, 0, err
}
return txHash, dcrutil.Amount(amt), nil
}
func compareMsgTxAndWithdrawalTxOutputs(t *testing.T, msgtx *wire.MsgTx, tx *withdrawalTx) {
nOutputs := len(tx.outputs)
if tx.changeOutput != nil {
nOutputs++
}
if len(msgtx.TxOut) != nOutputs {
t.Fatalf("Unexpected number of TxOuts; got %d, want %d", len(msgtx.TxOut), nOutputs)
}
for i, output := range tx.outputs {
outputRequest := output.request
txOut := msgtx.TxOut[i]
if !bytes.Equal(txOut.PkScript, outputRequest.PkScript) {
t.Fatalf(
"Unexpected pkScript for outputRequest %d; got %x, want %x",
i, txOut.PkScript, outputRequest.PkScript)
}
gotAmount := dcrutil.Amount(txOut.Value)
if gotAmount != outputRequest.Amount {
t.Fatalf(
"Unexpected amount for outputRequest %d; got %v, want %v",
i, gotAmount, outputRequest.Amount)
}
}
// Finally check the change output if it exists
if tx.changeOutput != nil {
msgTxChange := msgtx.TxOut[len(msgtx.TxOut)-1]
if msgTxChange != tx.changeOutput {
t.Fatalf("wrong TxOut in msgtx; got %v, want %v", msgTxChange, tx.changeOutput)
}
}
}
// TstCreateSeriesCredits creates a new credit for every item in the amounts
// slice, locked to the given series' address with branch==1 and index==0.
func TstCreateSeriesCredits(t *testing.T, pool *Pool, seriesID uint32, amounts []int64) []credit {
addr := TstNewWithdrawalAddress(t, pool, seriesID, Branch(1), Index(0))
pkScript, err := txscript.PayToAddrScript(addr.addr)
if err != nil {
t.Fatal(err)
}
msgTx := createMsgTx(pkScript, amounts)
txSha := msgTx.TxSha()
credits := make([]credit, len(amounts))
for i := range msgTx.TxOut {
c := wtxmgr.Credit{
OutPoint: wire.OutPoint{
Hash: txSha,
Index: uint32(i),
},
BlockMeta: wtxmgr.BlockMeta{
Block: wtxmgr.Block{Height: TstInputsBlock},
},
Amount: dcrutil.Amount(msgTx.TxOut[i].Value),
PkScript: msgTx.TxOut[i].PkScript,
}
credits[i] = newCredit(c, *addr)
}
return credits
}
// TestOutputSplittingNotEnoughInputs checks that an output will get split if we
// don't have enough inputs to fulfil it.
func TestOutputSplittingNotEnoughInputs(t *testing.T) {
tearDown, pool, _ := TstCreatePoolAndTxStore(t)
defer tearDown()
net := pool.Manager().ChainParams()
output1Amount := dcrutil.Amount(2)
output2Amount := dcrutil.Amount(3)
requests := []OutputRequest{
// These output requests will have the same server ID, so we know
// they'll be fulfilled in the order they're defined here, which is
// important for this test.
TstNewOutputRequest(t, 1, "34eVkREKgvvGASZW7hkgE2uNc1yycntMK6", output1Amount, net),
TstNewOutputRequest(t, 2, "34eVkREKgvvGASZW7hkgE2uNc1yycntMK6", output2Amount, net),
}
seriesID, eligible := TstCreateCreditsOnNewSeries(t, pool, []int64{7})
w := newWithdrawal(0, requests, eligible, *TstNewChangeAddress(t, pool, seriesID, 0))
w.txOptions = func(tx *withdrawalTx) {
// Trigger an output split because of lack of inputs by forcing a high fee.
// If we just started with not enough inputs for the requested outputs,
// fulfillRequests() would drop outputs until we had enough.
tx.calculateFee = TstConstantFee(3)
}
if err := w.fulfillRequests(); err != nil {
t.Fatal(err)
}
if len(w.transactions) != 1 {
t.Fatalf("Wrong number of finalized transactions; got %d, want 1", len(w.transactions))
}
tx := w.transactions[0]
if len(tx.outputs) != 2 {
t.Fatalf("Wrong number of outputs; got %d, want 2", len(tx.outputs))
}
// The first output should've been left untouched.
if tx.outputs[0].amount != output1Amount {
t.Fatalf("Wrong amount for first tx output; got %v, want %v",
tx.outputs[0].amount, output1Amount)
}
// The last output should have had its amount updated to whatever we had
// left after satisfying all previous outputs.
newAmount := tx.inputTotal() - output1Amount - tx.calculateFee()
checkLastOutputWasSplit(t, w, tx, output2Amount, newAmount)
}
// newWithdrawalTx creates a new withdrawalTx and calls setOptions()
// passing the newly created tx.
func newWithdrawalTx(setOptions func(tx *withdrawalTx)) *withdrawalTx {
tx := &withdrawalTx{}
tx.calculateSize = func() int { return calculateTxSize(tx) }
tx.calculateFee = func() dcrutil.Amount {
return dcrutil.Amount(1+tx.calculateSize()/1000) * feeIncrement
}
setOptions(tx)
return tx
}
// maybeDropRequests will check the total amount we have in eligible inputs and drop
// requested outputs (in descending amount order) if we don't have enough to
// fulfill them all. For every dropped output request we update its entry in
// w.status.outputs with the status string set to statusPartial.
func (w *withdrawal) maybeDropRequests() {
inputAmount := dcrutil.Amount(0)
for _, input := range w.eligibleInputs {
inputAmount += input.Amount
}
outputAmount := dcrutil.Amount(0)
for _, request := range w.pendingRequests {
outputAmount += request.Amount
}
sort.Sort(sort.Reverse(byAmount(w.pendingRequests)))
for inputAmount < outputAmount {
request := w.popRequest()
log.Infof("Not fulfilling request to send %v to %v; not enough credits.",
request.Amount, request.Address)
outputAmount -= request.Amount
w.status.outputs[request.outBailmentID()].status = statusPartial
}
}
// submitBlock submits the passed block to network after ensuring it passes all
// of the consensus validation rules.
func (m *CPUMiner) submitBlock(block *dcrutil.Block) bool {
m.submitBlockLock.Lock()
defer m.submitBlockLock.Unlock()
_, latestHeight := m.server.blockManager.chainState.Best()
// Be sure to set this so ProcessBlock doesn't fail! - Decred
block.SetHeight(latestHeight + 1)
// Process this block using the same rules as blocks coming from other
// nodes. This will in turn relay it to the network like normal.
isOrphan, err := m.server.blockManager.ProcessBlock(block, blockchain.BFNone)
if err != nil {
// Anything other than a rule violation is an unexpected error,
// so log that error as an internal error.
if rErr, ok := err.(blockchain.RuleError); !ok {
minrLog.Errorf("Unexpected error while processing "+
"block submitted via CPU miner: %v", err)
return false
} else {
// Occasionally errors are given out for timing errors with
// ResetMinDifficulty and high block works that is above
// the target. Feed these to debug.
if m.server.chainParams.ResetMinDifficulty &&
rErr.ErrorCode == blockchain.ErrHighHash {
minrLog.Debugf("Block submitted via CPU miner rejected "+
"because of ResetMinDifficulty time sync failure: %v",
err)
return false
} else {
// Other rule errors should be reported.
minrLog.Errorf("Block submitted via CPU miner rejected: %v", err)
return false
}
}
}
if isOrphan {
minrLog.Errorf("Block submitted via CPU miner is an orphan building "+
"on parent %v", block.MsgBlock().Header.PrevBlock)
return false
}
// The block was accepted.
coinbaseTxOuts := block.MsgBlock().Transactions[0].TxOut
coinbaseTxGenerated := int64(0)
for _, out := range coinbaseTxOuts {
coinbaseTxGenerated += out.Value
}
minrLog.Infof("Block submitted via CPU miner accepted (hash %s, "+
"height %v, amount %v)",
block.Sha(),
block.Height(),
dcrutil.Amount(coinbaseTxGenerated))
return true
}
func makeTxSummary(dbtx walletdb.ReadTx, w *Wallet, details *wtxmgr.TxDetails) TransactionSummary {
serializedTx := details.SerializedTx
if serializedTx == nil {
var buf bytes.Buffer
err := details.MsgTx.Serialize(&buf)
if err != nil {
log.Errorf("Transaction serialization: %v", err)
}
serializedTx = buf.Bytes()
}
var fee dcrutil.Amount
if len(details.Debits) == len(details.MsgTx.TxIn) {
for _, deb := range details.Debits {
fee += deb.Amount
}
for _, txOut := range details.MsgTx.TxOut {
fee -= dcrutil.Amount(txOut.Value)
}
}
var inputs []TransactionSummaryInput
if len(details.Debits) != 0 {
inputs = make([]TransactionSummaryInput, len(details.Debits))
for i, d := range details.Debits {
inputs[i] = TransactionSummaryInput{
Index: d.Index,
PreviousAccount: lookupInputAccount(dbtx, w, details, d),
PreviousAmount: d.Amount,
}
}
}
outputs := make([]TransactionSummaryOutput, 0, len(details.MsgTx.TxOut))
for i := range details.MsgTx.TxOut {
credIndex := len(outputs)
mine := len(details.Credits) > credIndex && details.Credits[credIndex].Index == uint32(i)
if !mine {
continue
}
acct, internal := lookupOutputChain(dbtx, w, details, details.Credits[credIndex])
output := TransactionSummaryOutput{
Index: uint32(i),
Account: acct,
Internal: internal,
}
outputs = append(outputs, output)
}
return TransactionSummary{
Hash: &details.Hash,
Transaction: serializedTx,
MyInputs: inputs,
MyOutputs: outputs,
Fee: fee,
Timestamp: details.Received.Unix(),
}
}
// TestRollBackLastOutputInsufficientOutputs checks that
// rollBackLastOutput returns an error if there are less than two
// outputs in the transaction.
func TestRollBackLastOutputInsufficientOutputs(t *testing.T) {
tx := newWithdrawalTx(defaultTxOptions)
_, _, err := tx.rollBackLastOutput()
TstCheckError(t, "", err, ErrPreconditionNotMet)
output := &WithdrawalOutput{request: TstNewOutputRequest(
t, 1, "34eVkREKgvvGASZW7hkgE2uNc1yycntMK6", dcrutil.Amount(3), &chaincfg.MainNetParams)}
tx.addOutput(output.request)
_, _, err = tx.rollBackLastOutput()
TstCheckError(t, "", err, ErrPreconditionNotMet)
}
// StakePoolTicketFee determines the stake pool ticket fee for a given ticket
// from the passed percentage. Pool fee as a percentage is truncated from 0.01%
// to 100.00%. This all must be done with integers, so bear with the big.Int
// usage below.
//
// See the included doc.go of this package for more information about the
// calculation of this fee.
func StakePoolTicketFee(stakeDiff dcrutil.Amount, relayFee dcrutil.Amount,
height int32, poolFee float64, params *chaincfg.Params) dcrutil.Amount {
// Shift the decimal two places, e.g. 1.00%
// to 100. This assumes that the proportion
// is already multiplied by 100 to give a
// percentage, thus making the entirety
// be a multiplication by 10000.
poolFeeAbs := math.Floor(poolFee * 100.0)
poolFeeInt := int64(poolFeeAbs)
// Subsidy is fetched from the blockchain package, then
// pushed forward a number of adjustment periods for
// compensation in gradual subsidy decay. Recall that
// the average time to claiming 50% of the tickets as
// votes is the approximately the same as the ticket
// pool size (params.TicketPoolSize), so take the
// ceiling of the ticket pool size divided by the
// reduction interval.
adjs := int(math.Ceil(float64(params.TicketPoolSize) /
float64(params.ReductionInterval)))
initSubsidyCacheOnce.Do(func() {
subsidyCache = blockchain.NewSubsidyCache(int64(height), params)
})
subsidy := blockchain.CalcStakeVoteSubsidy(subsidyCache, int64(height),
params)
for i := 0; i < adjs; i++ {
subsidy *= 100
subsidy /= 101
}
// The numerator is (p*10000*s*(v+z)) << 64.
shift := uint(64)
s := new(big.Int).SetInt64(subsidy)
v := new(big.Int).SetInt64(int64(stakeDiff))
z := new(big.Int).SetInt64(int64(relayFee))
num := new(big.Int).SetInt64(poolFeeInt)
num.Mul(num, s)
vPlusZ := new(big.Int).Add(v, z)
num.Mul(num, vPlusZ)
num.Lsh(num, shift)
// The denominator is 10000*(s+v).
// The extra 10000 above cancels out.
den := new(big.Int).Set(s)
den.Add(den, v)
den.Mul(den, new(big.Int).SetInt64(10000))
// Divide and shift back.
num.Div(num, den)
num.Rsh(num, shift)
return dcrutil.Amount(num.Int64())
}
// FeeForSerializeSize calculates the required fee for a transaction of some
// arbitrary size given a mempool's relay fee policy.
func FeeForSerializeSize(relayFeePerKb dcrutil.Amount, txSerializeSize int) dcrutil.Amount {
fee := relayFeePerKb * dcrutil.Amount(txSerializeSize) / 1000
if fee == 0 && relayFeePerKb > 0 {
fee = relayFeePerKb
}
if fee < 0 || fee > dcrutil.MaxAmount {
fee = dcrutil.MaxAmount
}
return fee
}
func TestTxFeeEstimationForSmallTx(t *testing.T) {
tx := newWithdrawalTx(defaultTxOptions)
// A tx that is smaller than 1000 bytes in size should have a fee of 10000
// atomss.
tx.calculateSize = func() int { return 999 }
fee := tx.calculateFee()
wantFee := dcrutil.Amount(1e3)
if fee != wantFee {
t.Fatalf("Unexpected tx fee; got %v, want %v", fee, wantFee)
}
}
func TestTxFeeEstimationForLargeTx(t *testing.T) {
tx := newWithdrawalTx(defaultTxOptions)
// A tx that is larger than 1000 bytes in size should have a fee of 1e3
// atoms plus 1e3 for every 1000 bytes.
tx.calculateSize = func() int { return 3000 }
fee := tx.calculateFee()
wantFee := dcrutil.Amount(4e3)
if fee != wantFee {
t.Fatalf("Unexpected tx fee; got %v, want %v", fee, wantFee)
}
}
// IsDustOutput determines whether a transaction output is considered dust.
// Transactions with dust outputs are not standard and are rejected by mempools
// with default policies.
func IsDustOutput(output *wire.TxOut, relayFeePerKb dcrutil.Amount) bool {
// Unspendable outputs which solely carry data are not checked for dust.
if txscript.GetScriptClass(output.Version, output.PkScript) == txscript.NullDataTy {
return false
}
// All other unspendable outputs are considered dust.
if txscript.IsUnspendable(output.Value, output.PkScript) {
return true
}
return IsDustAmount(dcrutil.Amount(output.Value), len(output.PkScript),
relayFeePerKb)
}