fix mempool accessing, rewrite get_mempool_entries_by_addresses

app/rpc/rpchandlers/get_mempool_entries_by_addresses.go

@@ -1,14 +1,9 @@
 package rpchandlers
 
 import (
-	"errors"
-
 	"github.com/kaspanet/kaspad/app/appmessage"
 	"github.com/kaspanet/kaspad/app/rpc/rpccontext"
 
-	"github.com/kaspanet/kaspad/domain/consensus/model/externalapi"
-	"github.com/kaspanet/kaspad/domain/consensus/utils/consensushashing"
-	"github.com/kaspanet/kaspad/domain/consensus/utils/txscript"
 	"github.com/kaspanet/kaspad/infrastructure/network/netadapter/router"
 	"github.com/kaspanet/kaspad/util"
 )
@@ -20,128 +15,77 @@ func HandleGetMempoolEntriesByAddresses(context *rpccontext.Context, _ *router.R
 
 	mempoolEntriesByAddresses := make([]*appmessage.MempoolEntryByAddress, 0)
 
-	if !getMempoolEntriesByAddressesRequest.FilterTransactionPool {
+	for _, addressString := range getMempoolEntriesByAddressesRequest.Addresses {
-		transactionPoolTransactions := context.Domain.MiningManager().AllTransactions()
+
-		transactionPoolEntriesByAddresses, err := extractMempoolEntriesByAddressesFromTransactions(
+		address, err := util.DecodeAddress(addressString, context.Config.NetParams().Prefix)
-			context,
-			getMempoolEntriesByAddressesRequest.Addresses,
-			transactionPoolTransactions,
-			false,
-		)
 		if err != nil {
-			rpcError := &appmessage.RPCError{}
+			errorMessage := &appmessage.GetMempoolEntriesByAddressesResponseMessage{}
-			if !errors.As(err, &rpcError) {
+			errorMessage.Error = appmessage.RPCErrorf("Could not decode address '%s': %s", addressString, err)
-				return nil, err
-			}
-			errorMessage := &appmessage.GetUTXOsByAddressesResponseMessage{}
-			errorMessage.Error = rpcError
 			return errorMessage, nil
 		}
-		mempoolEntriesByAddresses = append(mempoolEntriesByAddresses, transactionPoolEntriesByAddresses...)
-	}
-
-	if getMempoolEntriesByAddressesRequest.IncludeOrphanPool {
-
-		orphanPoolTransactions := context.Domain.MiningManager().AllOrphanTransactions()
-		orphanPoolEntriesByAddresse, err := extractMempoolEntriesByAddressesFromTransactions(
-			context,
-			getMempoolEntriesByAddressesRequest.Addresses,
-			orphanPoolTransactions,
-			true,
-		)
-		if err != nil {
-			rpcError := &appmessage.RPCError{}
-			if !errors.As(err, &rpcError) {
-				return nil, err
-			}
-			errorMessage := &appmessage.GetUTXOsByAddressesResponseMessage{}
-			errorMessage.Error = rpcError
-			return errorMessage, nil
-		}
-
-		mempoolEntriesByAddresses = append(mempoolEntriesByAddresses, orphanPoolEntriesByAddresse...)
-	}
-
-	return appmessage.NewGetMempoolEntriesByAddressesResponseMessage(mempoolEntriesByAddresses), nil
-}
-
-//TO DO: optimize extractMempoolEntriesByAddressesFromTransactions
-func extractMempoolEntriesByAddressesFromTransactions(context *rpccontext.Context, addresses []string, transactions []*externalapi.DomainTransaction, areOrphans bool) ([]*appmessage.MempoolEntryByAddress, error) {
-	mempoolEntriesByAddresses := make([]*appmessage.MempoolEntryByAddress, 0)
-	for _, addressString := range addresses {
-		_, err := util.DecodeAddress(addressString, context.Config.ActiveNetParams.Prefix)
-		if err != nil {
-			return nil, appmessage.RPCErrorf("Could not decode address '%s': %s", addressString, err)
-		}
 
 		sending := make([]*appmessage.MempoolEntry, 0)
 		receiving := make([]*appmessage.MempoolEntry, 0)
 
-		for _, transaction := range transactions {
+		if !getMempoolEntriesByAddressesRequest.FilterTransactionPool {
 
-			for i, input := range transaction.Inputs {
+			sendingInMempool, receivingInMempool, err := context.Domain.MiningManager().GetTransactionsByAddresses()
-				// TODO: Fix this
+			if err != nil {
-				if input.UTXOEntry == nil {
+				return nil, err
-					log.Errorf("Couldn't find UTXO entry for input %d in mempool transaction %s. This is a bug and should be fixed.", i, consensushashing.TransactionID(transaction))
-					continue
-				}
-
-				_, transactionSendingAddress, err := txscript.ExtractScriptPubKeyAddress(
-					input.UTXOEntry.ScriptPublicKey(),
-					context.Config.ActiveNetParams)
-				if err != nil {
-					return nil, err
-				}
-				if addressString == transactionSendingAddress.String() {
-					rpcTransaction := appmessage.DomainTransactionToRPCTransaction(transaction)
-					sending = append(
-						sending,
-						&appmessage.MempoolEntry{
-							Fee:         transaction.Fee,
-							Transaction: rpcTransaction,
-							IsOrphan:    areOrphans,
-						},
-					)
-					break //one input is enough
-				}
 			}
 
-			for _, output := range transaction.Outputs {
+			if transaction, found := sendingInMempool[address]; found {
-				_, transactionReceivingAddress, err := txscript.ExtractScriptPubKeyAddress(
+				rpcTransaction := appmessage.DomainTransactionToRPCTransaction(transaction)
-					output.ScriptPublicKey,
+				sending = append(sending, &appmessage.MempoolEntry{
-					context.Config.ActiveNetParams,
+					Fee:         transaction.Fee,
-				)
+					Transaction: rpcTransaction,
-				if err != nil {
+					IsOrphan:    false})
-					return nil, err
-				}
-				if addressString == transactionReceivingAddress.String() {
-					rpcTransaction := appmessage.DomainTransactionToRPCTransaction(transaction)
-					receiving = append(
-						receiving,
-						&appmessage.MempoolEntry{
-							Fee:         transaction.Fee,
-							Transaction: rpcTransaction,
-							IsOrphan:    areOrphans,
-						},
-					)
-					break //one output is enough
-				}
 			}
 
-			//Only append mempoolEntriesByAddress, if at least 1 mempoolEntry for the address is found.
+			if transaction, found := receivingInMempool[address]; found {
-			//This mimics the behaviour of GetUtxosByAddresses RPC call.
+				rpcTransaction := appmessage.DomainTransactionToRPCTransaction(transaction)
-			if len(sending) > 0 || len(receiving) > 0 {
+				receiving = append(receiving, &appmessage.MempoolEntry{
-				mempoolEntriesByAddresses = append(
+					Fee:         transaction.Fee,
-					mempoolEntriesByAddresses,
+					Transaction: rpcTransaction,
-					&appmessage.MempoolEntryByAddress{
+					IsOrphan:    false})
-						Address:   addressString,
-						Sending:   sending,
-						Receiving: receiving,
-					},
-				)
 			}
 		}
+		if getMempoolEntriesByAddressesRequest.IncludeOrphanPool {
 
+			sendingInOrphanPool, receivingInOrphanPool, err := context.Domain.MiningManager().GetOrphanTransactionsByAddresses()
+			if err != nil {
+				return nil, err
+			}
+
+			if transaction, found := sendingInOrphanPool[address]; found {
+				rpcTransaction := appmessage.DomainTransactionToRPCTransaction(transaction)
+				sending = append(sending, &appmessage.MempoolEntry{
+					Fee:         transaction.Fee,
+					Transaction: rpcTransaction,
+					IsOrphan:    true})
+			}
+
+			if transaction, found := receivingInOrphanPool[address]; found {
+				rpcTransaction := appmessage.DomainTransactionToRPCTransaction(transaction)
+				receiving = append(receiving, &appmessage.MempoolEntry{
+					Fee:         transaction.Fee,
+					Transaction: rpcTransaction,
+					IsOrphan:    true})
+			}
+
+		}
+
+		if len(sending) > 0 || len(receiving) > 0 {
+			mempoolEntriesByAddresses = append(
+				mempoolEntriesByAddresses,
+				&appmessage.MempoolEntryByAddress{
+					Address:   address.String(),
+					Sending:   sending,
+					Receiving: receiving,
+				},
+			)
+		}
 	}
-	return mempoolEntriesByAddresses, nil
+
+	return appmessage.NewGetMempoolEntriesByAddressesResponseMessage(mempoolEntriesByAddresses), nil
 }

domain/miningmanager/factory.go

@@ -20,7 +20,7 @@ type factory struct{}
 func (f *factory) NewMiningManager(consensusReference consensusreference.ConsensusReference, params *dagconfig.Params,
 	mempoolConfig *mempoolpkg.Config) MiningManager {
 
-	mempool := mempoolpkg.New(mempoolConfig, consensusReference)
+	mempool := mempoolpkg.New(mempoolConfig, params, consensusReference)
 	blockTemplateBuilder := blocktemplatebuilder.New(consensusReference, mempool, params.MaxBlockMass, params.CoinbasePayloadScriptPublicKeyMaxLength)
 
 	return &miningManager{

domain/miningmanager/mempool/check_transaction_standard_test.go

@@ -95,7 +95,7 @@ func TestCalcMinRequiredTxRelayFee(t *testing.T) {
 			mempoolConfig.MinimumRelayTransactionFee = test.minimumRelayTransactionFee
 			tcAsConsensus := tc.(externalapi.Consensus)
 			tcAsConsensusPointer := &tcAsConsensus
-			mempool := New(mempoolConfig, consensusreference.NewConsensusReference(&tcAsConsensusPointer)).(*mempool)
+			mempool := New(mempoolConfig, tc.DAGParams(), consensusreference.NewConsensusReference(&tcAsConsensusPointer)).(*mempool)
 
 			got := mempool.minimumRequiredTransactionRelayFee(test.size)
 			if got != test.want {
@@ -184,7 +184,7 @@ func TestIsTransactionOutputDust(t *testing.T) {
 			mempoolConfig.MinimumRelayTransactionFee = test.minimumRelayTransactionFee
 			tcAsConsensus := tc.(externalapi.Consensus)
 			tcAsConsensusPointer := &tcAsConsensus
-			mempool := New(mempoolConfig, consensusreference.NewConsensusReference(&tcAsConsensusPointer)).(*mempool)
+			mempool := New(mempoolConfig, tc.DAGParams(), consensusreference.NewConsensusReference(&tcAsConsensusPointer)).(*mempool)
 
 			res := mempool.IsTransactionOutputDust(&test.txOut)
 			if res != test.isDust {
@@ -306,7 +306,7 @@ func TestCheckTransactionStandardInIsolation(t *testing.T) {
 			tcAsConsensus := tc.(externalapi.Consensus)
 			tcAsConsensusPointer := &tcAsConsensus
 			consensusReference := consensusreference.NewConsensusReference(&tcAsConsensusPointer)
-			mempool := New(mempoolConfig, consensusReference).(*mempool)
+			mempool := New(mempoolConfig, tc.DAGParams(), consensusReference).(*mempool)
 
 			// Ensure standardness is as expected.
 			err := mempool.checkTransactionStandardInIsolation(test.tx)

domain/miningmanager/mempool/handle_new_block_transactions.go

@@ -6,7 +6,7 @@ import (
 	"github.com/kaspanet/kaspad/domain/consensus/utils/transactionhelper"
 )
 
-func (mp *mempool) handleNewBlockTransactions(blockTransactions []*externalapi.DomainTransaction) (
+func (mp *mempool) handleNewBlockTransactions(blockTransactions []*externalapi.DomainTransaction, clone bool) (
 	[]*externalapi.DomainTransaction, error) {
 
 	// Skip the coinbase transaction
@@ -30,7 +30,7 @@ func (mp *mempool) handleNewBlockTransactions(blockTransactions []*externalapi.D
 			return nil, err
 		}
 
-		acceptedOrphansFromThisTransaction, err := mp.orphansPool.processOrphansAfterAcceptedTransaction(transaction)
+		acceptedOrphansFromThisTransaction, err := mp.orphansPool.processOrphansAfterAcceptedTransaction(transaction, clone)
 		if err != nil {
 			return nil, err
 		}

domain/miningmanager/mempool/mempool.go

@@ -1,9 +1,12 @@
 package mempool
 
 import (
-	"github.com/kaspanet/kaspad/domain/consensusreference"
 	"sync"
 
+	"github.com/kaspanet/kaspad/domain/consensusreference"
+	"github.com/kaspanet/kaspad/domain/dagconfig"
+	"github.com/kaspanet/kaspad/util"
+
 	"github.com/kaspanet/kaspad/domain/consensus/model/externalapi"
 	miningmanagermodel "github.com/kaspanet/kaspad/domain/miningmanager/model"
 )
@@ -12,6 +15,7 @@ type mempool struct {
 	mtx sync.RWMutex
 
 	config             *Config
+	params             *dagconfig.Params
 	consensusReference consensusreference.ConsensusReference
 
 	mempoolUTXOSet   *mempoolUTXOSet
@@ -20,9 +24,10 @@ type mempool struct {
 }
 
 // New constructs a new mempool
-func New(config *Config, consensusReference consensusreference.ConsensusReference) miningmanagermodel.Mempool {
+func New(config *Config, params *dagconfig.Params, consensusReference consensusreference.ConsensusReference) miningmanagermodel.Mempool {
 	mp := &mempool{
 		config:             config,
+		params:             params,
 		consensusReference: consensusReference,
 	}
 
@@ -39,35 +44,57 @@ func (mp *mempool) ValidateAndInsertTransaction(transaction *externalapi.DomainT
 	mp.mtx.Lock()
 	defer mp.mtx.Unlock()
 
-	return mp.validateAndInsertTransaction(transaction, isHighPriority, allowOrphan)
+	return mp.validateAndInsertTransaction(transaction, isHighPriority, allowOrphan, true)
 }
 
 func (mp *mempool) GetTransaction(transactionID *externalapi.DomainTransactionID) (*externalapi.DomainTransaction, bool) {
 	mp.mtx.RLock()
 	defer mp.mtx.RUnlock()
 
-	return mp.transactionsPool.getTransaction(transactionID)
+	return mp.transactionsPool.getTransaction(transactionID, true)
+}
+
+func (mp *mempool) GetTransactionsByAddresses() (
+	sending map[util.Address]*externalapi.DomainTransaction,
+	receiving map[util.Address]*externalapi.DomainTransaction,
+	err error,
+) {
+	mp.mtx.RLock()
+	defer mp.mtx.RUnlock()
+
+	return mp.transactionsPool.getTransactionsByAddresses(true)
 }
 
 func (mp *mempool) AllTransactions() []*externalapi.DomainTransaction {
 	mp.mtx.RLock()
 	defer mp.mtx.RUnlock()
 
-	return mp.transactionsPool.getAllTransactions()
+	return mp.transactionsPool.getAllTransactions(true)
 }
 
 func (mp *mempool) GetOrphanTransaction(transactionID *externalapi.DomainTransactionID) (*externalapi.DomainTransaction, bool) {
 	mp.mtx.RLock()
 	defer mp.mtx.RUnlock()
 
-	return mp.orphansPool.getOrphanTransaction(transactionID)
+	return mp.orphansPool.getOrphanTransaction(transactionID, true)
+}
+
+func (mp *mempool) GetOrphanTransactionsByAddresses() (
+	sending map[util.Address]*externalapi.DomainTransaction,
+	receiving map[util.Address]*externalapi.DomainTransaction,
+	err error,
+) {
+	mp.mtx.RLock()
+	defer mp.mtx.RUnlock()
+
+	return mp.orphansPool.getOrphanTransactionsByAddresses(true)
 }
 
 func (mp *mempool) AllOrphanTransactions() []*externalapi.DomainTransaction {
 	mp.mtx.RLock()
 	defer mp.mtx.RUnlock()
 
-	return mp.orphansPool.getAllOrphanTransactions()
+	return mp.orphansPool.getAllOrphanTransactions(true)
 }
 
 func (mp *mempool) TransactionCount() int {
@@ -83,21 +110,21 @@ func (mp *mempool) HandleNewBlockTransactions(transactions []*externalapi.Domain
 	mp.mtx.Lock()
 	defer mp.mtx.Unlock()
 
-	return mp.handleNewBlockTransactions(transactions)
+	return mp.handleNewBlockTransactions(transactions, true)
 }
 
 func (mp *mempool) BlockCandidateTransactions() []*externalapi.DomainTransaction {
 	mp.mtx.RLock()
 	defer mp.mtx.RUnlock()
 
-	return mp.transactionsPool.allReadyTransactions()
+	return mp.transactionsPool.allReadyTransactions(true)
 }
 
 func (mp *mempool) RevalidateHighPriorityTransactions() (validTransactions []*externalapi.DomainTransaction, err error) {
 	mp.mtx.Lock()
 	defer mp.mtx.Unlock()
 
-	return mp.revalidateHighPriorityTransactions()
+	return mp.revalidateHighPriorityTransactions(true)
 }
 
 func (mp *mempool) RemoveTransactions(transactions []*externalapi.DomainTransaction, removeRedeemers bool) error {

domain/miningmanager/mempool/mempool_utxo_set.go

@@ -51,7 +51,7 @@ func (mpus *mempoolUTXOSet) addTransaction(transaction *model.MempoolTransaction
 func (mpus *mempoolUTXOSet) removeTransaction(transaction *model.MempoolTransaction) {
 	for _, input := range transaction.Transaction().Inputs {
 		// If the transaction creating the output spent by this input is in the mempool - restore it's UTXO
-		if _, ok := mpus.mempool.transactionsPool.getTransaction(&input.PreviousOutpoint.TransactionID); ok {
+		if _, ok := mpus.mempool.transactionsPool.getTransaction(&input.PreviousOutpoint.TransactionID, false); ok {
 			mpus.poolUnspentOutputs[input.PreviousOutpoint] = input.UTXOEntry
 		}
 		delete(mpus.transactionByPreviousOutpoint, input.PreviousOutpoint)

domain/miningmanager/mempool/orphan_pool.go

@@ -4,6 +4,8 @@ import (
 	"fmt"
 
 	"github.com/kaspanet/kaspad/domain/consensus/utils/constants"
+	"github.com/kaspanet/kaspad/domain/consensus/utils/txscript"
+	"github.com/kaspanet/kaspad/util"
 
 	"github.com/kaspanet/kaspad/domain/consensus/ruleerrors"
 
@@ -134,7 +136,7 @@ func (op *orphansPool) addOrphan(transaction *externalapi.DomainTransaction, isH
 	return nil
 }
 
-func (op *orphansPool) processOrphansAfterAcceptedTransaction(acceptedTransaction *externalapi.DomainTransaction) (
+func (op *orphansPool) processOrphansAfterAcceptedTransaction(acceptedTransaction *externalapi.DomainTransaction, clone bool) (
 	acceptedOrphans []*externalapi.DomainTransaction, err error) {
 
 	acceptedOrphans = []*externalapi.DomainTransaction{}
@@ -169,7 +171,11 @@ func (op *orphansPool) processOrphansAfterAcceptedTransaction(acceptedTransactio
 					}
 					return nil, err
 				}
-				acceptedOrphans = append(acceptedOrphans, orphan.Transaction())
+				if clone {
+					acceptedOrphans = append(acceptedOrphans, orphan.Transaction().Clone())
+				} else {
+					acceptedOrphans = append(acceptedOrphans, orphan.Transaction())
+				}
 			}
 		}
 	}
@@ -329,17 +335,67 @@ func (op *orphansPool) randomNonHighPriorityOrphan() *model.OrphanTransaction {
 	return nil
 }
 
-func (op *orphansPool) getOrphanTransaction(transactionID *externalapi.DomainTransactionID) (*externalapi.DomainTransaction, bool) {
+func (op *orphansPool) getOrphanTransaction(transactionID *externalapi.DomainTransactionID, clone bool) (*externalapi.DomainTransaction, bool) {
 	if orphanTransaction, ok := op.allOrphans[*transactionID]; ok {
+		if clone {
+			return orphanTransaction.Transaction().Clone(), true
+		}
 		return orphanTransaction.Transaction(), true
 	}
 	return nil, false
 }
 
-func (op *orphansPool) getAllOrphanTransactions() []*externalapi.DomainTransaction {
+func (op *orphansPool) getOrphanTransactionsByAddresses(clone bool) (
-	allOrphanTransactions := make([]*externalapi.DomainTransaction, 0, len(op.allOrphans))
+	sending map[util.Address]*externalapi.DomainTransaction,
+	receiving map[util.Address]*externalapi.DomainTransaction,
+	err error) {
+	sending = make(map[util.Address]*externalapi.DomainTransaction)
+	receiving = make(map[util.Address]*externalapi.DomainTransaction)
+	var transaction *externalapi.DomainTransaction
 	for _, mempoolTransaction := range op.allOrphans {
-		allOrphanTransactions = append(allOrphanTransactions, mempoolTransaction.Transaction())
+		if clone {
+			transaction = mempoolTransaction.Transaction().Clone()
+		} else {
+			transaction = mempoolTransaction.Transaction()
+		}
+		for _, input := range transaction.Inputs {
+			if input.UTXOEntry == nil { //this is not a bug, but a valid state of orphan transactions with missing outpoints.
+				continue
+			}
+			_, address, err := txscript.ExtractScriptPubKeyAddress(input.UTXOEntry.ScriptPublicKey(), op.mempool.params)
+			if err != nil {
+				return nil, nil, err
+			}
+			if address == nil { //none standard tx
+				continue
+			}
+			sending[address] = transaction
+			for _, output := range transaction.Outputs {
+				_, address, err := txscript.ExtractScriptPubKeyAddress(output.ScriptPublicKey, op.mempool.params)
+				if err != nil {
+					return nil, nil, err
+				}
+				if address == nil { //none standard tx
+					continue
+				}
+				receiving[address] = transaction
+
+			}
+		}
+	}
+
+	return sending, receiving, nil
+}
+
+func (op *orphansPool) getAllOrphanTransactions(clone bool) []*externalapi.DomainTransaction {
+	allOrphanTransactions := make([]*externalapi.DomainTransaction, len(op.allOrphans))
+	i := 0
+	for _, mempoolTransaction := range op.allOrphans {
+		if clone {
+			allOrphanTransactions[i] = mempoolTransaction.Transaction().Clone()
+		} else {
+			allOrphanTransactions[i] = mempoolTransaction.Transaction()
+		}
 	}
 	return allOrphanTransactions
 }

domain/miningmanager/mempool/revalidate_high_priority_transactions.go

@@ -6,22 +6,35 @@ import (
 	"github.com/kaspanet/kaspad/infrastructure/logger"
 )
 
-func (mp *mempool) revalidateHighPriorityTransactions() ([]*externalapi.DomainTransaction, error) {
+func (mp *mempool) revalidateHighPriorityTransactions(clone bool) ([]*externalapi.DomainTransaction, error) {
 	onEnd := logger.LogAndMeasureExecutionTime(log, "revalidateHighPriorityTransactions")
 	defer onEnd()
 
 	validTransactions := []*externalapi.DomainTransaction{}
+	if !clone {
+		for _, transaction := range mp.transactionsPool.highPriorityTransactions {
+			isValid, err := mp.revalidateTransaction(transaction)
+			if err != nil {
+				return nil, err
+			}
+			if !isValid {
+				continue
+			}
 
-	for _, transaction := range mp.transactionsPool.highPriorityTransactions {
+			validTransactions = append(validTransactions, transaction.Transaction())
-		isValid, err := mp.revalidateTransaction(transaction)
-		if err != nil {
-			return nil, err
-		}
-		if !isValid {
-			continue
 		}
+	} else {
+		for _, transaction := range mp.transactionsPool.highPriorityTransactions {
+			isValid, err := mp.revalidateTransaction(transaction)
+			if err != nil {
+				return nil, err
+			}
+			if !isValid {
+				continue
+			}
 
-		validTransactions = append(validTransactions, transaction.Transaction())
+			validTransactions = append(validTransactions, transaction.Transaction().Clone())
+		}
 	}
 
 	return validTransactions, nil

domain/miningmanager/mempool/transactions_pool.go

@@ -6,7 +6,9 @@ import (
 	"github.com/pkg/errors"
 
 	"github.com/kaspanet/kaspad/domain/consensus/model/externalapi"
+	"github.com/kaspanet/kaspad/domain/consensus/utils/txscript"
 	"github.com/kaspanet/kaspad/domain/miningmanager/mempool/model"
+	"github.com/kaspanet/kaspad/util"
 )
 
 type transactionsPool struct {
@@ -130,12 +132,16 @@ func (tp *transactionsPool) expireOldTransactions() error {
 	return nil
 }
 
-func (tp *transactionsPool) allReadyTransactions() []*externalapi.DomainTransaction {
+func (tp *transactionsPool) allReadyTransactions(clone bool) []*externalapi.DomainTransaction {
 	result := []*externalapi.DomainTransaction{}
 
 	for _, mempoolTransaction := range tp.allTransactions {
 		if len(mempoolTransaction.ParentTransactionsInPool()) == 0 {
-			result = append(result, mempoolTransaction.Transaction())
+			if clone {
+				result = append(result, mempoolTransaction.Transaction().Clone())
+			} else {
+				result = append(result, mempoolTransaction.Transaction())
+			}
 		}
 	}
 
@@ -204,17 +210,63 @@ func (tp *transactionsPool) limitTransactionCount() error {
 	return nil
 }
 
-func (tp *transactionsPool) getTransaction(transactionID *externalapi.DomainTransactionID) (*externalapi.DomainTransaction, bool) {
+func (tp *transactionsPool) getTransaction(transactionID *externalapi.DomainTransactionID, clone bool) (*externalapi.DomainTransaction, bool) {
 	if mempoolTransaction, ok := tp.allTransactions[*transactionID]; ok {
+		if clone {
+			return mempoolTransaction.Transaction().Clone(), true
+		}
 		return mempoolTransaction.Transaction(), true
 	}
 	return nil, false
 }
 
-func (tp *transactionsPool) getAllTransactions() []*externalapi.DomainTransaction {
+func (tp *transactionsPool) getTransactionsByAddresses(clone bool) (
-	allTransactions := make([]*externalapi.DomainTransaction, 0, len(tp.allTransactions))
+	sending map[util.Address]*externalapi.DomainTransaction,
+	receiving map[util.Address]*externalapi.DomainTransaction,
+	err error) {
+	sending = make(map[util.Address]*externalapi.DomainTransaction)
+	receiving = make(map[util.Address]*externalapi.DomainTransaction)
+	var transaction *externalapi.DomainTransaction
 	for _, mempoolTransaction := range tp.allTransactions {
-		allTransactions = append(allTransactions, mempoolTransaction.Transaction())
+		if clone {
+			transaction = mempoolTransaction.Transaction().Clone()
+		} else {
+			transaction = mempoolTransaction.Transaction()
+		}
+		for _, input := range transaction.Inputs {
+			_, address, err := txscript.ExtractScriptPubKeyAddress(input.UTXOEntry.ScriptPublicKey(), tp.mempool.params)
+			if err != nil {
+				return nil, nil, err
+			}
+			if address == nil { //ignore none-standard script
+				continue
+			}
+			sending[address] = transaction
+			for _, output := range transaction.Outputs {
+				_, address, err := txscript.ExtractScriptPubKeyAddress(output.ScriptPublicKey, tp.mempool.params)
+				if err != nil {
+					return nil, nil, err
+				}
+				if address == nil { //ignore none-standard script
+					continue
+				}
+				receiving[address] = transaction
+			}
+		}
+	}
+	return sending, receiving, nil
+}
+
+func (tp *transactionsPool) getAllTransactions(clone bool) []*externalapi.DomainTransaction {
+	allTransactions := make([]*externalapi.DomainTransaction, len(tp.allTransactions))
+	i := 0
+	for _, mempoolTransaction := range tp.allTransactions {
+		if clone {
+			allTransactions[i] = mempoolTransaction.Transaction().Clone()
+		} else {
+			allTransactions[i] = mempoolTransaction.Transaction()
+		}
+		i++
 	}
 	return allTransactions
 }

domain/miningmanager/mempool/validate_and_insert_transaction.go

@@ -10,7 +10,7 @@ import (
 )
 
 func (mp *mempool) validateAndInsertTransaction(transaction *externalapi.DomainTransaction, isHighPriority bool,
-	allowOrphan bool) (acceptedTransactions []*externalapi.DomainTransaction, err error) {
+	allowOrphan bool, clone bool) (acceptedTransactions []*externalapi.DomainTransaction, err error) {
 
 	onEnd := logger.LogAndMeasureExecutionTime(log,
 		fmt.Sprintf("validateAndInsertTransaction %s", consensushashing.TransactionID(transaction)))
@@ -49,12 +49,16 @@ func (mp *mempool) validateAndInsertTransaction(transaction *externalapi.DomainT
 		return nil, err
 	}
 
-	acceptedOrphans, err := mp.orphansPool.processOrphansAfterAcceptedTransaction(mempoolTransaction.Transaction())
+	acceptedOrphans, err := mp.orphansPool.processOrphansAfterAcceptedTransaction(mempoolTransaction.Transaction(), clone)
 	if err != nil {
 		return nil, err
 	}
 
-	acceptedTransactions = append([]*externalapi.DomainTransaction{transaction}, acceptedOrphans...)
+	if clone {
+		acceptedTransactions = append([]*externalapi.DomainTransaction{transaction.Clone()}, acceptedOrphans...)
+	} else {
+		acceptedTransactions = append([]*externalapi.DomainTransaction{transaction}, acceptedOrphans...)
+	}
 
 	err = mp.transactionsPool.limitTransactionCount()
 	if err != nil {

domain/miningmanager/miningmanager.go

@@ -7,6 +7,7 @@ import (
 	"github.com/kaspanet/kaspad/domain/consensus/model/externalapi"
 	"github.com/kaspanet/kaspad/domain/consensusreference"
 	miningmanagermodel "github.com/kaspanet/kaspad/domain/miningmanager/model"
+	"github.com/kaspanet/kaspad/util"
 )
 
 // MiningManager creates block templates for mining as well as maintaining
@@ -16,8 +17,16 @@ type MiningManager interface {
 	ClearBlockTemplate()
 	GetBlockTemplateBuilder() miningmanagermodel.BlockTemplateBuilder
 	GetTransaction(transactionID *externalapi.DomainTransactionID) (*externalapi.DomainTransaction, bool)
+	GetTransactionsByAddresses() (
+		sending map[util.Address]*externalapi.DomainTransaction,
+		receiving map[util.Address]*externalapi.DomainTransaction,
+		err error)
 	AllTransactions() []*externalapi.DomainTransaction
 	GetOrphanTransaction(transactionID *externalapi.DomainTransactionID) (*externalapi.DomainTransaction, bool)
+	GetOrphanTransactionsByAddresses() (
+		sending map[util.Address]*externalapi.DomainTransaction,
+		receiving map[util.Address]*externalapi.DomainTransaction,
+		err error)
 	AllOrphanTransactions() []*externalapi.DomainTransaction
 	TransactionCount() int
 	HandleNewBlockTransactions(txs []*externalapi.DomainTransaction) ([]*externalapi.DomainTransaction, error)
@@ -118,12 +127,26 @@ func (mm *miningManager) AllTransactions() []*externalapi.DomainTransaction {
 	return mm.mempool.AllTransactions()
 }
 
+func (mm *miningManager) GetTransactionsByAddresses() (
+	sending map[util.Address]*externalapi.DomainTransaction,
+	receiving map[util.Address]*externalapi.DomainTransaction,
+	err error) {
+	return mm.mempool.GetTransactionsByAddresses()
+}
+
 func (mm *miningManager) GetOrphanTransaction(
 	transactionID *externalapi.DomainTransactionID) (*externalapi.DomainTransaction, bool) {
 
 	return mm.mempool.GetOrphanTransaction(transactionID)
 }
 
+func (mm *miningManager) GetOrphanTransactionsByAddresses() (
+	sending map[util.Address]*externalapi.DomainTransaction,
+	receiving map[util.Address]*externalapi.DomainTransaction,
+	err error) {
+	return mm.mempool.GetTransactionsByAddresses()
+}
+
 func (mm *miningManager) AllOrphanTransactions() []*externalapi.DomainTransaction {
 
 	return mm.mempool.AllOrphanTransactions()

domain/miningmanager/model/interface_mempool.go

@@ -2,6 +2,7 @@ package model
 
 import (
 	"github.com/kaspanet/kaspad/domain/consensus/model/externalapi"
+	"github.com/kaspanet/kaspad/util"
 )
 
 // Mempool maintains a set of known transactions that
@@ -13,8 +14,16 @@ type Mempool interface {
 		acceptedTransactions []*externalapi.DomainTransaction, err error)
 	RemoveTransactions(txs []*externalapi.DomainTransaction, removeRedeemers bool) error
 	GetTransaction(transactionID *externalapi.DomainTransactionID) (*externalapi.DomainTransaction, bool)
+	GetTransactionsByAddresses() (
+		sending map[util.Address]*externalapi.DomainTransaction,
+		receiving map[util.Address]*externalapi.DomainTransaction,
+		err error)
 	AllTransactions() []*externalapi.DomainTransaction
 	GetOrphanTransaction(transactionID *externalapi.DomainTransactionID) (*externalapi.DomainTransaction, bool)
+	GetOrphanTransactionsByAddresses() (
+		sending map[util.Address]*externalapi.DomainTransaction,
+		receiving map[util.Address]*externalapi.DomainTransaction,
+		err error)
 	AllOrphanTransactions() []*externalapi.DomainTransaction
 	TransactionCount() int
 	RevalidateHighPriorityTransactions() (validTransactions []*externalapi.DomainTransaction, err error)