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authorPéter Szilágyi <peterke@gmail.com>2016-08-26 00:04:40 +0800
committerPéter Szilágyi <peterke@gmail.com>2016-09-02 19:15:40 +0800
commitb4a52513915d5a39ac055fc38cafed70098eb698 (patch)
tree1217ca54edf4fc72734dc00bf09d4a827106bd82
parenta183ea29f9313cb1d00ed8f73bfbc4ae51e9cb04 (diff)
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core: abstract out a sorted transaction hash map
-rw-r--r--core/tx_list.go395
-rw-r--r--core/tx_list_test.go14
-rw-r--r--core/tx_pool.go16
-rw-r--r--core/tx_pool_test.go26
4 files changed, 229 insertions, 222 deletions
diff --git a/core/tx_list.go b/core/tx_list.go
index 8c69331cc..c3ddf3148 100644
--- a/core/tx_list.go
+++ b/core/tx_list.go
@@ -45,20 +45,182 @@ func (h *nonceHeap) Pop() interface{} {
return x
}
+// txSortedMap is a nonce->transaction hash map with a heap based index to allow
+// iterating over the contents in a nonce-incrementing way.
+type txSortedMap struct {
+ items map[uint64]*types.Transaction // Hash map storing the transaction data
+ index *nonceHeap // Heap of nonces of all the stored transactions (non-strict mode)
+ cache types.Transactions // Cache of the transactions already sorted
+}
+
+// newTxSortedMap creates a new sorted transaction map.
+func newTxSortedMap() *txSortedMap {
+ return &txSortedMap{
+ items: make(map[uint64]*types.Transaction),
+ index: &nonceHeap{},
+ }
+}
+
+// Get retrieves the current transactions associated with the given nonce.
+func (m *txSortedMap) Get(nonce uint64) *types.Transaction {
+ return m.items[nonce]
+}
+
+// Put inserts a new transaction into the map, also updating the map's nonce
+// index. If a transaction already exists with the same nonce, it's overwritten.
+func (m *txSortedMap) Put(tx *types.Transaction) {
+ nonce := tx.Nonce()
+ if m.items[nonce] == nil {
+ heap.Push(m.index, nonce)
+ }
+ m.items[nonce], m.cache = tx, nil
+}
+
+// Forward removes all transactions from the map with a nonce lower than the
+// provided threshold. Every removed transaction is returned for any post-removal
+// maintenance.
+func (m *txSortedMap) Forward(threshold uint64) types.Transactions {
+ var removed types.Transactions
+
+ // Pop off heap items until the threshold is reached
+ for m.index.Len() > 0 && (*m.index)[0] < threshold {
+ nonce := heap.Pop(m.index).(uint64)
+ removed = append(removed, m.items[nonce])
+ delete(m.items, nonce)
+ }
+ // If we had a cached order, shift the front
+ if m.cache != nil {
+ m.cache = m.cache[len(removed):]
+ }
+ return removed
+}
+
+// Filter iterates over the list of transactions and removes all of them for which
+// the specified function evaluates to true.
+func (m *txSortedMap) Filter(filter func(*types.Transaction) bool) types.Transactions {
+ var removed types.Transactions
+
+ // Collect all the transactions to filter out
+ for nonce, tx := range m.items {
+ if filter(tx) {
+ removed = append(removed, tx)
+ delete(m.items, nonce)
+ }
+ }
+ // If transactions were removed, the heap and cache are ruined
+ if len(removed) > 0 {
+ *m.index = make([]uint64, 0, len(m.items))
+ for nonce, _ := range m.items {
+ *m.index = append(*m.index, nonce)
+ }
+ heap.Init(m.index)
+
+ m.cache = nil
+ }
+ return removed
+}
+
+// Cap places a hard limit on the number of items, returning all transactions
+// exceeding that limit.
+func (m *txSortedMap) Cap(threshold int) types.Transactions {
+ // Short circuit if the number of items is under the limit
+ if len(m.items) <= threshold {
+ return nil
+ }
+ // Otherwise gather and drop the highest nonce'd transactions
+ var drops types.Transactions
+
+ sort.Sort(*m.index)
+ for size := len(m.items); size > threshold; size-- {
+ drops = append(drops, m.items[(*m.index)[size-1]])
+ delete(m.items, (*m.index)[size-1])
+ }
+ *m.index = (*m.index)[:threshold]
+ heap.Init(m.index)
+
+ // If we had a cache, shift the back
+ if m.cache != nil {
+ m.cache = m.cache[:len(m.cache)-len(drops)]
+ }
+ return drops
+}
+
+// Remove deletes a transaction from the maintained map, returning whether the
+// transaction was found.
+func (m *txSortedMap) Remove(nonce uint64) bool {
+ // Short circuit if no transaction is present
+ _, ok := m.items[nonce]
+ if !ok {
+ return false
+ }
+ // Otherwise delete the transaction and fix the heap index
+ for i := 0; i < m.index.Len(); i++ {
+ if (*m.index)[i] == nonce {
+ heap.Remove(m.index, i)
+ break
+ }
+ }
+ delete(m.items, nonce)
+ m.cache = nil
+
+ return true
+}
+
+// Ready retrieves a sequentially increasing list of transactions starting at the
+// provided nonce that is ready for processing. The returned transactions will be
+// removed from the list.
+//
+// Note, all transactions with nonces lower than start will also be returned to
+// prevent getting into and invalid state. This is not something that should ever
+// happen but better to be self correcting than failing!
+func (m *txSortedMap) Ready(start uint64) types.Transactions {
+ // Short circuit if no transactions are available
+ if m.index.Len() == 0 || (*m.index)[0] > start {
+ return nil
+ }
+ // Otherwise start accumulating incremental transactions
+ var ready types.Transactions
+ for next := (*m.index)[0]; m.index.Len() > 0 && (*m.index)[0] == next; next++ {
+ ready = append(ready, m.items[next])
+ delete(m.items, next)
+ heap.Pop(m.index)
+ }
+ m.cache = nil
+
+ return ready
+}
+
+// Len returns the length of the transaction map.
+func (m *txSortedMap) Len() int {
+ return len(m.items)
+}
+
+// Flatten creates a nonce-sorted slice of transactions based on the loosely
+// sorted internal representation. The result of the sorting is cached in case
+// it's requested again before any modifications are made to the contents.
+func (m *txSortedMap) Flatten() types.Transactions {
+ // If the sorting was not cached yet, create and cache it
+ if m.cache == nil {
+ m.cache = make(types.Transactions, 0, len(m.items))
+ for _, tx := range m.items {
+ m.cache = append(m.cache, tx)
+ }
+ sort.Sort(types.TxByNonce(m.cache))
+ }
+ // Copy the cache to prevent accidental modifications
+ txs := make(types.Transactions, len(m.cache))
+ copy(txs, m.cache)
+ return txs
+}
+
// txList is a "list" of transactions belonging to an account, sorted by account
// nonce. The same type can be used both for storing contiguous transactions for
// the executable/pending queue; and for storing gapped transactions for the non-
// executable/future queue, with minor behavoiral changes.
type txList struct {
- strict bool // Whether nonces are strictly continuous or not
- items map[uint64]*types.Transaction // Hash map storing the transaction data
- cache types.Transactions // Cache of the transactions already sorted
-
- first uint64 // Nonce of the lowest stored transaction (strict mode)
- last uint64 // Nonce of the highest stored transaction (strict mode)
- index *nonceHeap // Heap of nonces of all the stored transactions (non-strict mode)
-
- costcap *big.Int // Price of the highest costing transaction (reset only if exceeds balance)
+ strict bool // Whether nonces are strictly continuous or not
+ txs *txSortedMap // Heap indexed sorted hash map of the transactions
+ costcap *big.Int // Price of the highest costing transaction (reset only if exceeds balance)
}
// newTxList create a new transaction list for maintaining nonce-indexable fast,
@@ -66,9 +228,7 @@ type txList struct {
func newTxList(strict bool) *txList {
return &txList{
strict: strict,
- items: make(map[uint64]*types.Transaction),
- first: math.MaxUint64,
- index: &nonceHeap{},
+ txs: newTxSortedMap(),
costcap: new(big.Int),
}
}
@@ -76,36 +236,19 @@ func newTxList(strict bool) *txList {
// Add tries to insert a new transaction into the list, returning whether the
// transaction was accepted, and if yes, any previous transaction it replaced.
//
-// In case of strict lists (contiguous nonces) the nonce boundaries are updated
-// appropriately with the new transaction. Otherwise (gapped nonces) the heap of
-// nonces is expanded with the new transaction.
+// If the new transaction is accepted into the list, the lists' cost threshold
+// is also potentially updated.
func (l *txList) Add(tx *types.Transaction) (bool, *types.Transaction) {
- // If an existing transaction is better, discard new one
- nonce := tx.Nonce()
-
- old, ok := l.items[nonce]
- if ok && old.GasPrice().Cmp(tx.GasPrice()) >= 0 {
+ // If there's an older better transaction, abort
+ old := l.txs.Get(tx.Nonce())
+ if old != nil && old.GasPrice().Cmp(tx.GasPrice()) >= 0 {
return false, nil
}
- // Otherwise insert the transaction and replace any previous one
- l.items[nonce] = tx
+ // Otherwise overwrite the old transaction with the current one
+ l.txs.Put(tx)
if cost := tx.Cost(); l.costcap.Cmp(cost) < 0 {
l.costcap = cost
}
- if l.strict {
- // In strict mode, maintain the nonce sequence boundaries
- if nonce < l.first {
- l.first = nonce
- }
- if nonce > l.last {
- l.last = nonce
- }
- } else {
- // In gapped mode, maintain the nonce heap
- heap.Push(l.index, nonce)
- }
- l.cache = nil
-
return true, old
}
@@ -113,31 +256,7 @@ func (l *txList) Add(tx *types.Transaction) (bool, *types.Transaction) {
// provided threshold. Every removed transaction is returned for any post-removal
// maintenance.
func (l *txList) Forward(threshold uint64) types.Transactions {
- var removed types.Transactions
-
- if l.strict {
- // In strict mode, push the lowest nonce forward to the threshold
- for l.first < threshold {
- if tx, ok := l.items[l.first]; ok {
- removed = append(removed, tx)
- }
- delete(l.items, l.first)
- l.first++
- }
- if l.first > l.last {
- l.last = l.first
- }
- } else {
- // In gapped mode, pop off heap items until the threshold is reached
- for l.index.Len() > 0 && (*l.index)[0] < threshold {
- nonce := heap.Pop(l.index).(uint64)
- removed = append(removed, l.items[nonce])
- delete(l.items, nonce)
- }
- }
- l.cache = nil
-
- return removed
+ return l.txs.Forward(threshold)
}
// Filter removes all transactions from the list with a cost higher than the
@@ -155,110 +274,43 @@ func (l *txList) Filter(threshold *big.Int) (types.Transactions, types.Transacti
}
l.costcap = new(big.Int).Set(threshold) // Lower the cap to the threshold
- // Gather all the transactions needing deletion
- var removed types.Transactions
- for _, tx := range l.items {
- if cost := tx.Cost(); cost.Cmp(threshold) > 0 {
- removed = append(removed, tx)
- delete(l.items, tx.Nonce())
- }
- }
- // Readjust the nonce boundaries/indexes and gather invalidate tranactions
+ // Filter out all the transactions above the account's funds
+ removed := l.txs.Filter(func(tx *types.Transaction) bool { return tx.Cost().Cmp(threshold) > 0 })
+
+ // If the list was strict, filter anything above the lowest nonce
var invalids types.Transactions
- if l.strict {
- // In strict mode iterate find the first gap and invalidate everything after it
- for i := l.first; i <= l.last; i++ {
- if _, ok := l.items[i]; !ok {
- // Gap found, invalidate all subsequent transactions
- for j := i + 1; j <= l.last; j++ {
- if tx, ok := l.items[j]; ok {
- invalids = append(invalids, tx)
- delete(l.items, j)
- }
- }
- // Reduce the highest transaction nonce and return
- l.last = i - 1
- break
+ if l.strict && len(removed) > 0 {
+ lowest := uint64(math.MaxUint64)
+ for _, tx := range removed {
+ if nonce := tx.Nonce(); lowest > nonce {
+ lowest = nonce
}
}
- } else {
- // In gapped mode no transactions are invalid, but the heap is ruined
- l.index = &nonceHeap{}
- for nonce, _ := range l.items {
- *l.index = append(*l.index, nonce)
- }
- heap.Init(l.index)
+ invalids = l.txs.Filter(func(tx *types.Transaction) bool { return tx.Nonce() > lowest })
}
- l.cache = nil
-
return removed, invalids
}
// Cap places a hard limit on the number of items, returning all transactions
// exceeding that limit.
func (l *txList) Cap(threshold int) types.Transactions {
- // Short circuit if the number of items is under the limit
- if len(l.items) < threshold {
- return nil
- }
- // Otherwise gather and drop the highest nonce'd transactions
- var drops types.Transactions
-
- if l.strict {
- // In strict mode, just gather top down from last to first
- for len(l.items) > threshold {
- if tx, ok := l.items[l.last]; ok {
- drops = append(drops, tx)
- delete(l.items, l.last)
- l.last--
- }
- }
- } else {
- // In gapped mode it's expensive: we need to sort and drop like that
- sort.Sort(*l.index)
- for size := len(l.items); size > threshold; size-- {
- drops = append(drops, l.items[(*l.index)[size-1]])
- delete(l.items, (*l.index)[size-1])
- *l.index = (*l.index)[:size-1]
- }
- heap.Init(l.index)
- }
- l.cache = nil
-
- return drops
+ return l.txs.Cap(threshold)
}
// Remove deletes a transaction from the maintained list, returning whether the
// transaction was found, and also returning any transaction invalidated due to
// the deletion (strict mode only).
func (l *txList) Remove(tx *types.Transaction) (bool, types.Transactions) {
+ // Remove the transaction from the set
nonce := tx.Nonce()
- if _, ok := l.items[nonce]; ok {
- // Remove the item and invalidate the sorted cache
- delete(l.items, nonce)
- l.cache = nil
-
- // Remove all invalidated transactions (strict mode only!)
- var invalids types.Transactions
- if l.strict {
- invalids = make(types.Transactions, 0, l.last-nonce)
- for i := nonce + 1; i <= l.last; i++ {
- invalids = append(invalids, l.items[i])
- delete(l.items, i)
- }
- l.last = nonce - 1
- } else {
- // In gapped mode, remove the nonce from the index but honour the heap
- for i := 0; i < l.index.Len(); i++ {
- if (*l.index)[i] == nonce {
- heap.Remove(l.index, i)
- break
- }
- }
- }
- return true, invalids
+ if removed := l.txs.Remove(nonce); !removed {
+ return false, nil
}
- return false, nil
+ // In strict mode, filter out non-executable transactions
+ if l.strict {
+ return true, l.txs.Filter(func(tx *types.Transaction) bool { return tx.Nonce() > nonce })
+ }
+ return true, nil
}
// Ready retrieves a sequentially increasing list of transactions starting at the
@@ -269,63 +321,22 @@ func (l *txList) Remove(tx *types.Transaction) (bool, types.Transactions) {
// prevent getting into and invalid state. This is not something that should ever
// happen but better to be self correcting than failing!
func (l *txList) Ready(start uint64) types.Transactions {
- var txs types.Transactions
- if l.strict {
- // In strict mode make sure we have valid transaction, return all contiguous
- if l.first > start {
- return nil
- }
- for {
- if tx, ok := l.items[l.first]; ok {
- txs = append(txs, tx)
- delete(l.items, l.first)
- l.first++
- continue
- }
- break
- }
- } else {
- // In gapped mode, check the heap start and return all contiguous
- if l.index.Len() == 0 || (*l.index)[0] > start {
- return nil
- }
- next := (*l.index)[0]
- for l.index.Len() > 0 && (*l.index)[0] == next {
- txs = append(txs, l.items[next])
- delete(l.items, next)
- heap.Pop(l.index)
- next++
- }
- }
- l.cache = nil
-
- return txs
+ return l.txs.Ready(start)
}
// Len returns the length of the transaction list.
func (l *txList) Len() int {
- return len(l.items)
+ return l.txs.Len()
}
// Empty returns whether the list of transactions is empty or not.
func (l *txList) Empty() bool {
- return len(l.items) == 0
+ return l.Len() == 0
}
// Flatten creates a nonce-sorted slice of transactions based on the loosely
// sorted internal representation. The result of the sorting is cached in case
// it's requested again before any modifications are made to the contents.
func (l *txList) Flatten() types.Transactions {
- // If the sorting was not cached yet, create and cache it
- if l.cache == nil {
- l.cache = make(types.Transactions, 0, len(l.items))
- for _, tx := range l.items {
- l.cache = append(l.cache, tx)
- }
- sort.Sort(types.TxByNonce(l.cache))
- }
- // Copy the cache to prevent accidental modifications
- txs := make(types.Transactions, len(l.cache))
- copy(txs, l.cache)
- return txs
+ return l.txs.Flatten()
}
diff --git a/core/tx_list_test.go b/core/tx_list_test.go
index ea83ca479..92b211937 100644
--- a/core/tx_list_test.go
+++ b/core/tx_list_test.go
@@ -41,18 +41,12 @@ func TestStrictTxListAdd(t *testing.T) {
list.Add(txs[v])
}
// Verify internal state
- if list.first != 0 {
- t.Errorf("lowest nonce mismatch: have %d, want %d", list.first, 0)
- }
- if int(list.last) != len(txs)-1 {
- t.Errorf("highest nonce mismatch: have %d, want %d", list.last, len(txs)-1)
- }
- if len(list.items) != len(txs) {
- t.Errorf("transaction count mismatch: have %d, want %d", len(list.items), len(txs))
+ if len(list.txs.items) != len(txs) {
+ t.Errorf("transaction count mismatch: have %d, want %d", len(list.txs.items), len(txs))
}
for i, tx := range txs {
- if list.items[tx.Nonce()] != tx {
- t.Errorf("item %d: transaction mismatch: have %v, want %v", i, list.items[tx.Nonce()], tx)
+ if list.txs.items[tx.Nonce()] != tx {
+ t.Errorf("item %d: transaction mismatch: have %v, want %v", i, list.txs.items[tx.Nonce()], tx)
}
}
}
diff --git a/core/tx_pool.go b/core/tx_pool.go
index 58d304f00..f8b11a7ce 100644
--- a/core/tx_pool.go
+++ b/core/tx_pool.go
@@ -154,7 +154,8 @@ func (pool *TxPool) resetState() {
// Update all accounts to the latest known pending nonce
for addr, list := range pool.pending {
- pool.pendingState.SetNonce(addr, list.last+1)
+ txs := list.Flatten() // Heavy but will be cached and is needed by the miner anyway
+ pool.pendingState.SetNonce(addr, txs[len(txs)-1].Nonce()+1)
}
// Check the queue and move transactions over to the pending if possible
// or remove those that have become invalid
@@ -366,7 +367,7 @@ func (pool *TxPool) promoteTx(addr common.Address, hash common.Hash, tx *types.T
// Set the potentially new pending nonce and notify any subsystems of the new tx
pool.beats[addr] = time.Now()
- pool.pendingState.SetNonce(addr, list.last+1)
+ pool.pendingState.SetNonce(addr, tx.Nonce()+1)
go pool.eventMux.Post(TxPreEvent{tx})
}
@@ -439,19 +440,20 @@ func (pool *TxPool) removeTx(hash common.Hash) {
// Remove the transaction from the pending lists and reset the account nonce
if pending := pool.pending[addr]; pending != nil {
if removed, invalids := pending.Remove(tx); removed {
- // If no more transactions are left, remove the list and reset the nonce
+ // If no more transactions are left, remove the list
if pending.Empty() {
delete(pool.pending, addr)
delete(pool.beats, addr)
-
- pool.pendingState.SetNonce(addr, tx.Nonce())
} else {
- // Otherwise update the nonce and postpone any invalidated transactions
- pool.pendingState.SetNonce(addr, pending.last)
+ // Otherwise postpone any invalidated transactions
for _, tx := range invalids {
pool.enqueueTx(tx.Hash(), tx)
}
}
+ // Update the account nonce if needed
+ if nonce := tx.Nonce(); pool.pendingState.GetNonce(addr) > nonce {
+ pool.pendingState.SetNonce(addr, tx.Nonce())
+ }
}
}
// Transaction is in the future queue
diff --git a/core/tx_pool_test.go b/core/tx_pool_test.go
index f08334fa1..4bc5aed38 100644
--- a/core/tx_pool_test.go
+++ b/core/tx_pool_test.go
@@ -105,7 +105,7 @@ func TestTransactionQueue(t *testing.T) {
currentState.SetNonce(from, 2)
pool.enqueueTx(tx.Hash(), tx)
pool.promoteExecutables()
- if _, ok := pool.pending[from].items[tx.Nonce()]; ok {
+ if _, ok := pool.pending[from].txs.items[tx.Nonce()]; ok {
t.Error("expected transaction to be in tx pool")
}
@@ -224,7 +224,7 @@ func TestTransactionDoubleNonce(t *testing.T) {
if pool.pending[addr].Len() != 1 {
t.Error("expected 1 pending transactions, got", pool.pending[addr].Len())
}
- if tx := pool.pending[addr].items[0]; tx.Hash() != tx2.Hash() {
+ if tx := pool.pending[addr].txs.items[0]; tx.Hash() != tx2.Hash() {
t.Errorf("transaction mismatch: have %x, want %x", tx.Hash(), tx2.Hash())
}
// Add the thid transaction and ensure it's not saved (smaller price)
@@ -235,7 +235,7 @@ func TestTransactionDoubleNonce(t *testing.T) {
if pool.pending[addr].Len() != 1 {
t.Error("expected 1 pending transactions, got", pool.pending[addr].Len())
}
- if tx := pool.pending[addr].items[0]; tx.Hash() != tx2.Hash() {
+ if tx := pool.pending[addr].txs.items[0]; tx.Hash() != tx2.Hash() {
t.Errorf("transaction mismatch: have %x, want %x", tx.Hash(), tx2.Hash())
}
// Ensure the total transaction count is correct
@@ -346,16 +346,16 @@ func TestTransactionDropping(t *testing.T) {
state.AddBalance(account, big.NewInt(-750))
pool.resetState()
- if _, ok := pool.pending[account].items[tx0.Nonce()]; !ok {
+ if _, ok := pool.pending[account].txs.items[tx0.Nonce()]; !ok {
t.Errorf("funded pending transaction missing: %v", tx0)
}
- if _, ok := pool.pending[account].items[tx1.Nonce()]; ok {
+ if _, ok := pool.pending[account].txs.items[tx1.Nonce()]; ok {
t.Errorf("out-of-fund pending transaction present: %v", tx1)
}
- if _, ok := pool.queue[account].items[tx10.Nonce()]; !ok {
+ if _, ok := pool.queue[account].txs.items[tx10.Nonce()]; !ok {
t.Errorf("funded queued transaction missing: %v", tx10)
}
- if _, ok := pool.queue[account].items[tx11.Nonce()]; ok {
+ if _, ok := pool.queue[account].txs.items[tx11.Nonce()]; ok {
t.Errorf("out-of-fund queued transaction present: %v", tx11)
}
if len(pool.all) != 2 {
@@ -410,25 +410,25 @@ func TestTransactionPostponing(t *testing.T) {
state.AddBalance(account, big.NewInt(-750))
pool.resetState()
- if _, ok := pool.pending[account].items[txns[0].Nonce()]; !ok {
+ if _, ok := pool.pending[account].txs.items[txns[0].Nonce()]; !ok {
t.Errorf("tx %d: valid and funded transaction missing from pending pool: %v", 0, txns[0])
}
- if _, ok := pool.queue[account].items[txns[0].Nonce()]; ok {
+ if _, ok := pool.queue[account].txs.items[txns[0].Nonce()]; ok {
t.Errorf("tx %d: valid and funded transaction present in future queue: %v", 0, txns[0])
}
for i, tx := range txns[1:] {
if i%2 == 1 {
- if _, ok := pool.pending[account].items[tx.Nonce()]; ok {
+ if _, ok := pool.pending[account].txs.items[tx.Nonce()]; ok {
t.Errorf("tx %d: valid but future transaction present in pending pool: %v", i+1, tx)
}
- if _, ok := pool.queue[account].items[tx.Nonce()]; !ok {
+ if _, ok := pool.queue[account].txs.items[tx.Nonce()]; !ok {
t.Errorf("tx %d: valid but future transaction missing from future queue: %v", i+1, tx)
}
} else {
- if _, ok := pool.pending[account].items[tx.Nonce()]; ok {
+ if _, ok := pool.pending[account].txs.items[tx.Nonce()]; ok {
t.Errorf("tx %d: out-of-fund transaction present in pending pool: %v", i+1, tx)
}
- if _, ok := pool.queue[account].items[tx.Nonce()]; ok {
+ if _, ok := pool.queue[account].txs.items[tx.Nonce()]; ok {
t.Errorf("tx %d: out-of-fund transaction present in future queue: %v", i+1, tx)
}
}