diff --git a/mempool/interface.go b/mempool/interface.go
index f6fe1f05..5b3bb8db 100644
--- a/mempool/interface.go
+++ b/mempool/interface.go
@@ -6,6 +6,7 @@ import (
 	"github.com/btcsuite/btcd/btcjson"
 	"github.com/btcsuite/btcd/btcutil"
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
+	"github.com/btcsuite/btcd/mining"
 	"github.com/btcsuite/btcd/wire"
 )
 
@@ -68,4 +69,34 @@ type TxMempool interface {
 	// a transaction in the mempool. If that's the case the spending
 	// transaction will be returned, if not nil will be returned.
 	CheckSpend(op wire.OutPoint) *btcutil.Tx
+
+	// RemoveOrphansByTag removes all orphan transactions tagged with the
+	// provided identifier. Returns the number of orphans removed.
+	RemoveOrphansByTag(tag Tag) uint64
+
+	// MiningDescs returns a slice of mining descriptors for all the
+	// transactions in the source pool.
+	MiningDescs() []*mining.TxDesc
+
+	// RemoveDoubleSpends removes all transactions that spend outputs spent
+	// by the passed transaction from the mempool.
+	RemoveDoubleSpends(tx *btcutil.Tx)
+
+	// RemoveOrphan removes the passed orphan transaction from the orphan
+	// pool.
+	RemoveOrphan(tx *btcutil.Tx)
+
+	// ProcessOrphans processes orphan transactions that now have a valid
+	// ancestor after the provided transaction was accepted. Returns a slice
+	// of transaction descriptors for any orphans that were accepted.
+	ProcessOrphans(acceptedTx *btcutil.Tx) []*TxDesc
+
+	// MaybeAcceptTransaction validates and potentially accepts a
+	// transaction to the memory pool. It returns a slice of hashes for all
+	// transactions that were accepted, the transaction descriptor for the
+	// primary transaction (if accepted), and an error if the transaction
+	// was rejected. The isNew parameter indicates whether this is a new
+	// transaction or one being added from a reorganization. The rateLimit
+	// parameter indicates whether to apply rate limiting for relay.
+	MaybeAcceptTransaction(tx *btcutil.Tx, isNew, rateLimit bool) ([]*chainhash.Hash, *TxDesc, error)
 }
diff --git a/mempool/mocks.go b/mempool/mocks.go
index e81309c5..124dac48 100644
--- a/mempool/mocks.go
+++ b/mempool/mocks.go
@@ -6,6 +6,7 @@ import (
 	"github.com/btcsuite/btcd/btcjson"
 	"github.com/btcsuite/btcd/btcutil"
 	"github.com/btcsuite/btcd/chaincfg/chainhash"
+	"github.com/btcsuite/btcd/mining"
 	"github.com/btcsuite/btcd/wire"
 	"github.com/stretchr/testify/mock"
 )
@@ -123,3 +124,61 @@ func (m *MockTxMempool) CheckSpend(op wire.OutPoint) *btcutil.Tx {
 
 	return args.Get(0).(*btcutil.Tx)
 }
+
+// RemoveOrphansByTag removes all orphan transactions tagged with the provided
+// identifier.
+func (m *MockTxMempool) RemoveOrphansByTag(tag Tag) uint64 {
+	args := m.Called(tag)
+	return args.Get(0).(uint64)
+}
+
+// MiningDescs returns a slice of mining descriptors for all the transactions
+// in the source pool.
+func (m *MockTxMempool) MiningDescs() []*mining.TxDesc {
+	args := m.Called()
+	if args.Get(0) == nil {
+		return nil
+	}
+	return args.Get(0).([]*mining.TxDesc)
+}
+
+// RemoveDoubleSpends removes all transactions that spend outputs spent by the
+// passed transaction from the mempool.
+func (m *MockTxMempool) RemoveDoubleSpends(tx *btcutil.Tx) {
+	m.Called(tx)
+}
+
+// RemoveOrphan removes the passed orphan transaction from the orphan pool.
+func (m *MockTxMempool) RemoveOrphan(tx *btcutil.Tx) {
+	m.Called(tx)
+}
+
+// ProcessOrphans processes orphan transactions that now have a valid ancestor
+// after the provided transaction was accepted.
+func (m *MockTxMempool) ProcessOrphans(acceptedTx *btcutil.Tx) []*TxDesc {
+	args := m.Called(acceptedTx)
+	if args.Get(0) == nil {
+		return nil
+	}
+	return args.Get(0).([]*TxDesc)
+}
+
+// MaybeAcceptTransaction validates and potentially accepts a transaction to
+// the memory pool.
+func (m *MockTxMempool) MaybeAcceptTransaction(tx *btcutil.Tx, isNew,
+	rateLimit bool) ([]*chainhash.Hash, *TxDesc, error) {
+
+	args := m.Called(tx, isNew, rateLimit)
+
+	var hashes []*chainhash.Hash
+	if args.Get(0) != nil {
+		hashes = args.Get(0).([]*chainhash.Hash)
+	}
+
+	var desc *TxDesc
+	if args.Get(1) != nil {
+		desc = args.Get(1).(*TxDesc)
+	}
+
+	return hashes, desc, args.Error(2)
+}
diff --git a/netsync/interface.go b/netsync/interface.go
index 6a873bd8..e8201769 100644
--- a/netsync/interface.go
+++ b/netsync/interface.go
@@ -31,7 +31,7 @@ type PeerNotifier interface {
 type Config struct {
 	PeerNotifier PeerNotifier
 	Chain        *blockchain.BlockChain
-	TxMemPool    *mempool.TxPool
+	TxMemPool    mempool.TxMempool
 	ChainParams  *chaincfg.Params
 
 	DisableCheckpoints bool
diff --git a/netsync/manager.go b/netsync/manager.go
index d10188d5..a2a50300 100644
--- a/netsync/manager.go
+++ b/netsync/manager.go
@@ -183,7 +183,7 @@ type SyncManager struct {
 	started        int32
 	shutdown       int32
 	chain          *blockchain.BlockChain
-	txMemPool      *mempool.TxPool
+	txMemPool      mempool.TxMempool
 	chainParams    *chaincfg.Params
 	progressLogger *blockProgressLogger
 	msgChan        chan interface{}