diff --git a/core/txpool/legacypool/legacypool.go b/core/txpool/legacypool/legacypool.go
index 78c4ce8b2c..3fcc8fbf05 100644
--- a/core/txpool/legacypool/legacypool.go
+++ b/core/txpool/legacypool/legacypool.go
@@ -1077,7 +1077,7 @@ func (pool *LegacyPool) scheduleReorgLoop() {
 		launchNextRun bool
 		reset         *txpoolResetRequest
 		dirtyAccounts *accountSet
-		queuedEvents  = make(map[common.Address]*sortedMap)
+		queuedEvents  = make(map[common.Address]*SortedMap)
 	)
 	for {
 		// Launch next background reorg if needed
@@ -1090,7 +1090,7 @@ func (pool *LegacyPool) scheduleReorgLoop() {
 			launchNextRun = false
 
 			reset, dirtyAccounts = nil, nil
-			queuedEvents = make(map[common.Address]*sortedMap)
+			queuedEvents = make(map[common.Address]*SortedMap)
 		}
 
 		select {
@@ -1119,7 +1119,7 @@ func (pool *LegacyPool) scheduleReorgLoop() {
 			// request one later if they want the events sent.
 			addr, _ := types.Sender(pool.signer, tx)
 			if _, ok := queuedEvents[addr]; !ok {
-				queuedEvents[addr] = newSortedMap()
+				queuedEvents[addr] = NewSortedMap()
 			}
 			queuedEvents[addr].Put(tx)
 
@@ -1138,7 +1138,7 @@ func (pool *LegacyPool) scheduleReorgLoop() {
 }
 
 // runReorg runs reset and promoteExecutables on behalf of scheduleReorgLoop.
-func (pool *LegacyPool) runReorg(done chan struct{}, reset *txpoolResetRequest, dirtyAccounts *accountSet, events map[common.Address]*sortedMap) {
+func (pool *LegacyPool) runReorg(done chan struct{}, reset *txpoolResetRequest, dirtyAccounts *accountSet, events map[common.Address]*SortedMap) {
 	defer func(t0 time.Time) {
 		reorgDurationTimer.Update(time.Since(t0))
 	}(time.Now())
@@ -1205,7 +1205,7 @@ func (pool *LegacyPool) runReorg(done chan struct{}, reset *txpoolResetRequest,
 	for _, tx := range promoted {
 		addr, _ := types.Sender(pool.signer, tx)
 		if _, ok := events[addr]; !ok {
-			events[addr] = newSortedMap()
+			events[addr] = NewSortedMap()
 		}
 		events[addr].Put(tx)
 	}
diff --git a/core/txpool/legacypool/list.go b/core/txpool/legacypool/list.go
index ddaad0dd9a..d214ed3629 100644
--- a/core/txpool/legacypool/list.go
+++ b/core/txpool/legacypool/list.go
@@ -52,31 +52,31 @@ func (h *nonceHeap) Pop() interface{} {
 	return x
 }
 
-// sortedMap is a nonce->transaction hash map with a heap based index to allow
+// SortedMap is a nonce->transaction hash map with a heap based index to allow
 // iterating over the contents in a nonce-incrementing way.
-type sortedMap struct {
+type SortedMap 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
 	cacheMu sync.Mutex                    // Mutex covering the cache
 }
 
-// newSortedMap creates a new nonce-sorted transaction map.
-func newSortedMap() *sortedMap {
-	return &sortedMap{
+// NewSortedMap creates a new nonce-sorted transaction map.
+func NewSortedMap() *SortedMap {
+	return &SortedMap{
 		items: make(map[uint64]*types.Transaction),
 		index: new(nonceHeap),
 	}
 }
 
 // Get retrieves the current transactions associated with the given nonce.
-func (m *sortedMap) Get(nonce uint64) *types.Transaction {
+func (m *SortedMap) 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 *sortedMap) Put(tx *types.Transaction) {
+func (m *SortedMap) Put(tx *types.Transaction) {
 	nonce := tx.Nonce()
 	if m.items[nonce] == nil {
 		heap.Push(m.index, nonce)
@@ -89,7 +89,7 @@ func (m *sortedMap) Put(tx *types.Transaction) {
 // 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 *sortedMap) Forward(threshold uint64) types.Transactions {
+func (m *SortedMap) Forward(threshold uint64) types.Transactions {
 	var removed types.Transactions
 
 	// Pop off heap items until the threshold is reached
@@ -112,7 +112,7 @@ func (m *sortedMap) Forward(threshold uint64) types.Transactions {
 // Filter, as opposed to 'filter', re-initialises the heap after the operation is done.
 // If you want to do several consecutive filterings, it's therefore better to first
 // do a .filter(func1) followed by .Filter(func2) or reheap()
-func (m *sortedMap) Filter(filter func(*types.Transaction) bool) types.Transactions {
+func (m *SortedMap) Filter(filter func(*types.Transaction) bool) types.Transactions {
 	removed := m.filter(filter)
 	// If transactions were removed, the heap and cache are ruined
 	if len(removed) > 0 {
@@ -121,7 +121,7 @@ func (m *sortedMap) Filter(filter func(*types.Transaction) bool) types.Transacti
 	return removed
 }
 
-func (m *sortedMap) reheap() {
+func (m *SortedMap) reheap() {
 	*m.index = make([]uint64, 0, len(m.items))
 	for nonce := range m.items {
 		*m.index = append(*m.index, nonce)
@@ -134,7 +134,7 @@ func (m *sortedMap) reheap() {
 
 // filter is identical to Filter, but **does not** regenerate the heap. This method
 // should only be used if followed immediately by a call to Filter or reheap()
-func (m *sortedMap) filter(filter func(*types.Transaction) bool) types.Transactions {
+func (m *SortedMap) filter(filter func(*types.Transaction) bool) types.Transactions {
 	var removed types.Transactions
 
 	// Collect all the transactions to filter out
@@ -154,7 +154,7 @@ func (m *sortedMap) filter(filter func(*types.Transaction) bool) types.Transacti
 
 // Cap places a hard limit on the number of items, returning all transactions
 // exceeding that limit.
-func (m *sortedMap) Cap(threshold int) types.Transactions {
+func (m *SortedMap) Cap(threshold int) types.Transactions {
 	// Short circuit if the number of items is under the limit
 	if len(m.items) <= threshold {
 		return nil
@@ -181,7 +181,7 @@ func (m *sortedMap) Cap(threshold int) types.Transactions {
 
 // Remove deletes a transaction from the maintained map, returning whether the
 // transaction was found.
-func (m *sortedMap) Remove(nonce uint64) bool {
+func (m *SortedMap) Remove(nonce uint64) bool {
 	// Short circuit if no transaction is present
 	_, ok := m.items[nonce]
 	if !ok {
@@ -209,7 +209,7 @@ func (m *sortedMap) Remove(nonce uint64) bool {
 // Note, all transactions with nonces lower than start will also be returned to
 // prevent getting into an invalid state. This is not something that should ever
 // happen but better to be self correcting than failing!
-func (m *sortedMap) Ready(start uint64) types.Transactions {
+func (m *SortedMap) Ready(start uint64) types.Transactions {
 	// Short circuit if no transactions are available
 	if m.index.Len() == 0 || (*m.index)[0] > start {
 		return nil
@@ -229,11 +229,11 @@ func (m *sortedMap) Ready(start uint64) types.Transactions {
 }
 
 // Len returns the length of the transaction map.
-func (m *sortedMap) Len() int {
+func (m *SortedMap) Len() int {
 	return len(m.items)
 }
 
-func (m *sortedMap) flatten() types.Transactions {
+func (m *SortedMap) flatten() types.Transactions {
 	m.cacheMu.Lock()
 	defer m.cacheMu.Unlock()
 	// If the sorting was not cached yet, create and cache it
@@ -250,7 +250,7 @@ func (m *sortedMap) flatten() types.Transactions {
 // 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 *sortedMap) Flatten() types.Transactions {
+func (m *SortedMap) Flatten() types.Transactions {
 	cache := m.flatten()
 	// Copy the cache to prevent accidental modification
 	txs := make(types.Transactions, len(cache))
@@ -260,7 +260,7 @@ func (m *sortedMap) Flatten() types.Transactions {
 
 // LastElement returns the last element of a flattened list, thus, the
 // transaction with the highest nonce
-func (m *sortedMap) LastElement() *types.Transaction {
+func (m *SortedMap) LastElement() *types.Transaction {
 	cache := m.flatten()
 	return cache[len(cache)-1]
 }
@@ -271,7 +271,7 @@ func (m *sortedMap) LastElement() *types.Transaction {
 // executable/future queue, with minor behavioral changes.
 type list struct {
 	strict bool       // Whether nonces are strictly continuous or not
-	txs    *sortedMap // Heap indexed sorted hash map of the transactions
+	txs    *SortedMap // Heap indexed sorted hash map of the transactions
 
 	costcap   *uint256.Int // Price of the highest costing transaction (reset only if exceeds balance)
 	gascap    uint64       // Gas limit of the highest spending transaction (reset only if exceeds block limit)
@@ -283,7 +283,7 @@ type list struct {
 func newList(strict bool) *list {
 	return &list{
 		strict:    strict,
-		txs:       newSortedMap(),
+		txs:       NewSortedMap(),
 		costcap:   new(uint256.Int),
 		totalcost: new(uint256.Int),
 	}
diff --git a/core/txpool/legacypool/journal.go b/core/txpool/tracking/journal.go
similarity index 99%
rename from core/txpool/legacypool/journal.go
rename to core/txpool/tracking/journal.go
index 899ed00bcc..ba40b885b9 100644
--- a/core/txpool/legacypool/journal.go
+++ b/core/txpool/tracking/journal.go
@@ -14,7 +14,7 @@
 // You should have received a copy of the GNU Lesser General Public License
 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
 
-package legacypool
+package tracking
 
 import (
 	"errors"
diff --git a/core/txpool/legacypool/tx_tracker.go b/core/txpool/tracking/tx_tracker.go
similarity index 94%
rename from core/txpool/legacypool/tx_tracker.go
rename to core/txpool/tracking/tx_tracker.go
index 660de4ae30..c8d5ef6422 100644
--- a/core/txpool/legacypool/tx_tracker.go
+++ b/core/txpool/tracking/tx_tracker.go
@@ -15,7 +15,7 @@
 // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
 
 // Package legacypool implements the normal EVM execution transaction pool.
-package legacypool
+package tracking
 
 import (
 	"sync"
@@ -23,6 +23,7 @@ import (
 
 	"github.com/ethereum/go-ethereum/common"
 	"github.com/ethereum/go-ethereum/core/txpool"
+	"github.com/ethereum/go-ethereum/core/txpool/legacypool"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/log"
 	"github.com/ethereum/go-ethereum/params"
@@ -38,8 +39,8 @@ var recheckInterval = time.Minute
 // This struct does not care about transaction validity, price-bumps or account limits,
 // but optimistically accepts transactions.
 type TxTracker struct {
-	all    map[common.Hash]*types.Transaction // All tracked transactions
-	byAddr map[common.Address]*sortedMap      // Transactions by address
+	all    map[common.Hash]*types.Transaction       // All tracked transactions
+	byAddr map[common.Address]*legacypool.SortedMap // Transactions by address
 
 	journal   *journal       // Journal of local transaction to back up to disk
 	rejournal time.Duration  // How often to rotate journal
@@ -55,7 +56,7 @@ func NewTxTracker(journalPath string, journalTime time.Duration, chainConfig *pa
 	signer := types.LatestSigner(chainConfig)
 	pool := &TxTracker{
 		all:        make(map[common.Hash]*types.Transaction),
-		byAddr:     make(map[common.Address]*sortedMap),
+		byAddr:     make(map[common.Address]*legacypool.SortedMap),
 		signer:     signer,
 		shutdownCh: make(chan struct{}),
 		pool:       next,
@@ -84,7 +85,7 @@ func (tracker *TxTracker) TrackAll(txs []*types.Transaction) {
 		tracker.all[tx.Hash()] = tx
 		addr, _ := types.Sender(tracker.signer, tx)
 		if tracker.byAddr[addr] == nil {
-			tracker.byAddr[addr] = newSortedMap()
+			tracker.byAddr[addr] = legacypool.NewSortedMap()
 		}
 		tracker.byAddr[addr].Put(tx)
 		_ = tracker.journal.insert(tx)
diff --git a/eth/backend.go b/eth/backend.go
index 7e32921843..6d1e02006a 100644
--- a/eth/backend.go
+++ b/eth/backend.go
@@ -35,6 +35,7 @@ import (
 	"github.com/ethereum/go-ethereum/core/txpool"
 	"github.com/ethereum/go-ethereum/core/txpool/blobpool"
 	"github.com/ethereum/go-ethereum/core/txpool/legacypool"
+	"github.com/ethereum/go-ethereum/core/txpool/tracking"
 	"github.com/ethereum/go-ethereum/core/types"
 	"github.com/ethereum/go-ethereum/core/vm"
 	"github.com/ethereum/go-ethereum/eth/downloader"
@@ -69,7 +70,7 @@ type Ethereum struct {
 	// core protocol objects
 	config         *ethconfig.Config
 	txPool         *txpool.TxPool
-	localTxTracker *legacypool.TxTracker
+	localTxTracker *tracking.TxTracker
 	blockchain     *core.BlockChain
 
 	handler *handler
@@ -240,7 +241,7 @@ func New(stack *node.Node, config *ethconfig.Config) (*Ethereum, error) {
 		// TODO!
 		// We also need to handle config.Locals, the accounts that are
 		// to be treated as locals, regardless of how they arrive to geth.
-		eth.localTxTracker = legacypool.NewTxTracker(config.TxPool.Journal,
+		eth.localTxTracker = tracking.NewTxTracker(config.TxPool.Journal,
 			config.TxPool.Rejournal,
 			eth.blockchain.Config(), eth.txPool)
 		stack.RegisterLifecycle(eth.localTxTracker)