Export NID instead of receipts, remove federation event cache as no longer needed

federationsender/federationsender.go

@@ -46,7 +46,7 @@ func NewInternalAPI(
 ) api.FederationSenderInternalAPI {
 	cfg := &base.Cfg.FederationSender
 
-	federationSenderDB, err := storage.NewDatabase(&cfg.Database, base.Caches)
+	federationSenderDB, err := storage.NewDatabase(&cfg.Database)
 	if err != nil {
 		logrus.WithError(err).Panic("failed to connect to federation sender db")
 	}

federationsender/queue/destinationqueue.go

@@ -23,7 +23,7 @@ import (
 
 	"github.com/matrix-org/dendrite/federationsender/statistics"
 	"github.com/matrix-org/dendrite/federationsender/storage"
-	"github.com/matrix-org/dendrite/federationsender/storage/shared"
+	"github.com/matrix-org/dendrite/federationsender/types"
 	"github.com/matrix-org/dendrite/roomserver/api"
 	"github.com/matrix-org/gomatrix"
 	"github.com/matrix-org/gomatrixserverlib"
@@ -67,7 +67,7 @@ type destinationQueue struct {
 // Send event adds the event to the pending queue for the destination.
 // If the queue is empty then it starts a background goroutine to
 // start sending events to that destination.
-func (oq *destinationQueue) sendEvent(event *gomatrixserverlib.HeaderedEvent, receipt *shared.Receipt) {
+func (oq *destinationQueue) sendEvent(event *gomatrixserverlib.HeaderedEvent, nid types.ContentNID) {
 	if event == nil {
 		log.Errorf("attempt to send nil PDU with destination %q", oq.destination)
 		return
@@ -79,7 +79,7 @@ func (oq *destinationQueue) sendEvent(event *gomatrixserverlib.HeaderedEvent, re
 		context.TODO(),
 		"",             // TODO: remove this, as we don't need to persist the transaction ID
 		oq.destination, // the destination server name
-		receipt,        // NIDs from federationsender_queue_json table
+		nid,            // NIDs from federationsender_queue_json table
 	); err != nil {
 		log.WithError(err).Errorf("failed to associate PDU %q with destination %q", event.EventID(), oq.destination)
 		return
@@ -93,7 +93,7 @@ func (oq *destinationQueue) sendEvent(event *gomatrixserverlib.HeaderedEvent, re
 		if len(oq.pendingPDUs) < maxPDUsInMemory {
 			oq.pendingPDUs = append(oq.pendingPDUs, &queuedPDU{
 				pdu: event,
-				receipt: receipt,
+				nid: nid,
 			})
 		} else {
 			oq.overflowed.Store(true)
@@ -111,7 +111,7 @@ func (oq *destinationQueue) sendEvent(event *gomatrixserverlib.HeaderedEvent, re
 // sendEDU adds the EDU event to the pending queue for the destination.
 // If the queue is empty then it starts a background goroutine to
 // start sending events to that destination.
-func (oq *destinationQueue) sendEDU(event *gomatrixserverlib.EDU, receipt *shared.Receipt) {
+func (oq *destinationQueue) sendEDU(event *gomatrixserverlib.EDU, nid types.ContentNID) {
 	if event == nil {
 		log.Errorf("attempt to send nil EDU with destination %q", oq.destination)
 		return
@@ -122,7 +122,7 @@ func (oq *destinationQueue) sendEDU(event *gomatrixserverlib.EDU, receipt *share
 	if err := oq.db.AssociateEDUWithDestination(
 		context.TODO(),
 		oq.destination, // the destination server name
-		receipt,        // NIDs from federationsender_queue_json table
+		nid,            // NIDs from federationsender_queue_json table
 	); err != nil {
 		log.WithError(err).Errorf("failed to associate EDU with destination %q", oq.destination)
 		return
@@ -136,7 +136,7 @@ func (oq *destinationQueue) sendEDU(event *gomatrixserverlib.EDU, receipt *share
 		if len(oq.pendingEDUs) < maxEDUsInMemory {
 			oq.pendingEDUs = append(oq.pendingEDUs, &queuedEDU{
 				edu: event,
-				receipt: receipt,
+				nid: nid,
 			})
 		} else {
 			oq.overflowed.Store(true)
@@ -183,20 +183,20 @@ func (oq *destinationQueue) getPendingFromDatabase() {
 	// have cached. We will index them based on the receipt,
 	// which ultimately just contains the index of the PDU/EDU
 	// in the database.
-	gotPDUs := map[string]struct{}{}
+	gotPDUs := map[types.ContentNID]struct{}{}
-	gotEDUs := map[string]struct{}{}
+	gotEDUs := map[types.ContentNID]struct{}{}
 	for _, pdu := range oq.pendingPDUs {
-		gotPDUs[pdu.receipt.String()] = struct{}{}
+		gotPDUs[pdu.nid] = struct{}{}
 	}
 	for _, edu := range oq.pendingEDUs {
-		gotEDUs[edu.receipt.String()] = struct{}{}
+		gotEDUs[edu.nid] = struct{}{}
 	}
 
 	if pduCapacity := maxPDUsInMemory - len(oq.pendingPDUs); pduCapacity > 0 {
 		// We have room in memory for some PDUs - let's request no more than that.
 		if pdus, err := oq.db.GetPendingPDUs(ctx, oq.destination, pduCapacity); err == nil {
 			for receipt, pdu := range pdus {
-				if _, ok := gotPDUs[receipt.String()]; ok {
+				if _, ok := gotPDUs[receipt]; ok {
 					continue
 				}
 				oq.pendingPDUs = append(oq.pendingPDUs, &queuedPDU{receipt, pdu})
@@ -210,7 +210,7 @@ func (oq *destinationQueue) getPendingFromDatabase() {
 		// We have room in memory for some EDUs - let's request no more than that.
 		if edus, err := oq.db.GetPendingEDUs(ctx, oq.destination, eduCapacity); err == nil {
 			for receipt, edu := range edus {
-				if _, ok := gotEDUs[receipt.String()]; ok {
+				if _, ok := gotEDUs[receipt]; ok {
 					continue
 				}
 				oq.pendingEDUs = append(oq.pendingEDUs, &queuedEDU{receipt, edu})
@@ -375,8 +375,8 @@ func (oq *destinationQueue) nextTransaction(
 		return false, 0, 0, nil
 	}
 
-	var pduReceipts []*shared.Receipt
+	var pduReceipts []types.ContentNID
-	var eduReceipts []*shared.Receipt
+	var eduReceipts []types.ContentNID
 
 	// Go through PDUs that we retrieved from the database, if any,
 	// and add them into the transaction.
@@ -387,7 +387,7 @@ func (oq *destinationQueue) nextTransaction(
 		// Append the JSON of the event, since this is a json.RawMessage type in the
 		// gomatrixserverlib.Transaction struct
 		t.PDUs = append(t.PDUs, pdu.pdu.JSON())
-		pduReceipts = append(pduReceipts, pdu.receipt)
+		pduReceipts = append(pduReceipts, pdu.nid)
 	}
 
 	// Do the same for pending EDUS in the queue.
@@ -396,7 +396,7 @@ func (oq *destinationQueue) nextTransaction(
 			continue
 		}
 		t.EDUs = append(t.EDUs, *edu.edu)
-		eduReceipts = append(eduReceipts, edu.receipt)
+		eduReceipts = append(eduReceipts, edu.nid)
 	}
 
 	logrus.WithField("server_name", oq.destination).Debugf("Sending transaction %q containing %d PDUs, %d EDUs", t.TransactionID, len(t.PDUs), len(t.EDUs))

federationsender/queue/queue.go

@@ -24,7 +24,7 @@ import (
 
 	"github.com/matrix-org/dendrite/federationsender/statistics"
 	"github.com/matrix-org/dendrite/federationsender/storage"
-	"github.com/matrix-org/dendrite/federationsender/storage/shared"
+	"github.com/matrix-org/dendrite/federationsender/types"
 	"github.com/matrix-org/dendrite/roomserver/api"
 	"github.com/matrix-org/gomatrixserverlib"
 	log "github.com/sirupsen/logrus"
@@ -102,12 +102,12 @@ type SigningInfo struct {
 }
 
 type queuedPDU struct {
-	receipt *shared.Receipt
+	nid types.ContentNID
 	pdu *gomatrixserverlib.HeaderedEvent
 }
 
 type queuedEDU struct {
-	receipt *shared.Receipt
+	nid types.ContentNID
 	edu *gomatrixserverlib.EDU
 }
 

federationsender/storage/interface.go

@@ -17,7 +17,6 @@ package storage
 import (
 	"context"
 
-	"github.com/matrix-org/dendrite/federationsender/storage/shared"
 	"github.com/matrix-org/dendrite/federationsender/types"
 	"github.com/matrix-org/dendrite/internal"
 	"github.com/matrix-org/gomatrixserverlib"
@@ -34,19 +33,19 @@ type Database interface {
 	GetJoinedHostsForRooms(ctx context.Context, roomIDs []string) ([]gomatrixserverlib.ServerName, error)
 	PurgeRoomState(ctx context.Context, roomID string) error
 
-	StoreJSON(ctx context.Context, js string) (*shared.Receipt, error)
+	StoreJSON(ctx context.Context, js string) (types.ContentNID, error)
 
-	GetPendingPDUs(ctx context.Context, serverName gomatrixserverlib.ServerName, limit int) (pdus map[*shared.Receipt]*gomatrixserverlib.HeaderedEvent, err error)
+	GetPendingPDUs(ctx context.Context, serverName gomatrixserverlib.ServerName, limit int) (pdus map[types.ContentNID]*gomatrixserverlib.HeaderedEvent, err error)
-	GetPendingEDUs(ctx context.Context, serverName gomatrixserverlib.ServerName, limit int) (edus map[*shared.Receipt]*gomatrixserverlib.EDU, err error)
+	GetPendingEDUs(ctx context.Context, serverName gomatrixserverlib.ServerName, limit int) (edus map[types.ContentNID]*gomatrixserverlib.EDU, err error)
 
-	AssociatePDUWithDestination(ctx context.Context, transactionID gomatrixserverlib.TransactionID, serverName gomatrixserverlib.ServerName, receipt *shared.Receipt) error
+	AssociatePDUWithDestination(ctx context.Context, transactionID gomatrixserverlib.TransactionID, serverName gomatrixserverlib.ServerName, nid types.ContentNID) error
-	AssociateEDUWithDestination(ctx context.Context, serverName gomatrixserverlib.ServerName, receipt *shared.Receipt) error
+	AssociateEDUWithDestination(ctx context.Context, serverName gomatrixserverlib.ServerName, nid types.ContentNID) error
 
-	CleanPDUs(ctx context.Context, serverName gomatrixserverlib.ServerName, receipts []*shared.Receipt) error
+	CleanPDUs(ctx context.Context, serverName gomatrixserverlib.ServerName, nids []types.ContentNID) error
-	CleanEDUs(ctx context.Context, serverName gomatrixserverlib.ServerName, receipts []*shared.Receipt) error
+	CleanEDUs(ctx context.Context, serverName gomatrixserverlib.ServerName, nids []types.ContentNID) error
 
-	GetPendingPDUCount(ctx context.Context, serverName gomatrixserverlib.ServerName) (int64, error)
+	GetPendingPDUCount(ctx context.Context, serverName gomatrixserverlib.ServerName) (types.ContentNID, error)
-	GetPendingEDUCount(ctx context.Context, serverName gomatrixserverlib.ServerName) (int64, error)
+	GetPendingEDUCount(ctx context.Context, serverName gomatrixserverlib.ServerName) (types.ContentNID, error)
 
 	GetPendingPDUServerNames(ctx context.Context) ([]gomatrixserverlib.ServerName, error)
 	GetPendingEDUServerNames(ctx context.Context) ([]gomatrixserverlib.ServerName, error)

federationsender/storage/postgres/queue_edus_table.go

@@ -19,6 +19,7 @@ import (
 	"database/sql"
 
 	"github.com/lib/pq"
+	"github.com/matrix-org/dendrite/federationsender/types"
 	"github.com/matrix-org/dendrite/internal"
 	"github.com/matrix-org/dendrite/internal/sqlutil"
 	"github.com/matrix-org/gomatrixserverlib"
@@ -105,7 +106,7 @@ func (s *queueEDUsStatements) InsertQueueEDU(
 	txn *sql.Tx,
 	eduType string,
 	serverName gomatrixserverlib.ServerName,
-	nid int64,
+	nid types.ContentNID,
 ) error {
 	stmt := sqlutil.TxStmt(txn, s.insertQueueEDUStmt)
 	_, err := stmt.ExecContext(
@@ -120,10 +121,14 @@ func (s *queueEDUsStatements) InsertQueueEDU(
 func (s *queueEDUsStatements) DeleteQueueEDUs(
 	ctx context.Context, txn *sql.Tx,
 	serverName gomatrixserverlib.ServerName,
-	jsonNIDs []int64,
+	jsonNIDs []types.ContentNID,
 ) error {
 	stmt := sqlutil.TxStmt(txn, s.deleteQueueEDUStmt)
-	_, err := stmt.ExecContext(ctx, serverName, pq.Int64Array(jsonNIDs))
+	nids := make([]int64, 0, len(jsonNIDs))
+	for _, n := range jsonNIDs {
+		nids = append(nids, int64(n))
+	}
+	_, err := stmt.ExecContext(ctx, serverName, pq.Int64Array(nids))
 	return err
 }
 
@@ -131,16 +136,16 @@ func (s *queueEDUsStatements) SelectQueueEDUs(
 	ctx context.Context, txn *sql.Tx,
 	serverName gomatrixserverlib.ServerName,
 	limit int,
-) ([]int64, error) {
+) ([]types.ContentNID, error) {
 	stmt := sqlutil.TxStmt(txn, s.selectQueueEDUStmt)
 	rows, err := stmt.QueryContext(ctx, serverName, limit)
 	if err != nil {
 		return nil, err
 	}
 	defer internal.CloseAndLogIfError(ctx, rows, "queueFromStmt: rows.close() failed")
-	var result []int64
+	var result []types.ContentNID
 	for rows.Next() {
-		var nid int64
+		var nid types.ContentNID
 		if err = rows.Scan(&nid); err != nil {
 			return nil, err
 		}
@@ -150,9 +155,9 @@ func (s *queueEDUsStatements) SelectQueueEDUs(
 }
 
 func (s *queueEDUsStatements) SelectQueueEDUReferenceJSONCount(
-	ctx context.Context, txn *sql.Tx, jsonNID int64,
+	ctx context.Context, txn *sql.Tx, jsonNID types.ContentNID,
-) (int64, error) {
+) (types.ContentNID, error) {
-	var count int64
+	var count types.ContentNID
 	stmt := sqlutil.TxStmt(txn, s.selectQueueEDUReferenceJSONCountStmt)
 	err := stmt.QueryRowContext(ctx, jsonNID).Scan(&count)
 	if err == sql.ErrNoRows {
@@ -163,8 +168,8 @@ func (s *queueEDUsStatements) SelectQueueEDUReferenceJSONCount(
 
 func (s *queueEDUsStatements) SelectQueueEDUCount(
 	ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName,
-) (int64, error) {
+) (types.ContentNID, error) {
-	var count int64
+	var count types.ContentNID
 	stmt := sqlutil.TxStmt(txn, s.selectQueueEDUCountStmt)
 	err := stmt.QueryRowContext(ctx, serverName).Scan(&count)
 	if err == sql.ErrNoRows {

federationsender/storage/postgres/queue_json_table.go

@@ -19,6 +19,7 @@ import (
 	"database/sql"
 
 	"github.com/lib/pq"
+	"github.com/matrix-org/dendrite/federationsender/types"
 	"github.com/matrix-org/dendrite/internal"
 	"github.com/matrix-org/dendrite/internal/sqlutil"
 )
@@ -76,9 +77,9 @@ func NewPostgresQueueJSONTable(db *sql.DB) (s *queueJSONStatements, err error) {
 
 func (s *queueJSONStatements) InsertQueueJSON(
 	ctx context.Context, txn *sql.Tx, json string,
-) (int64, error) {
+) (types.ContentNID, error) {
 	stmt := sqlutil.TxStmt(txn, s.insertJSONStmt)
-	var lastid int64
+	var lastid types.ContentNID
 	if err := stmt.QueryRowContext(ctx, json).Scan(&lastid); err != nil {
 		return 0, err
 	}
@@ -86,25 +87,33 @@ func (s *queueJSONStatements) InsertQueueJSON(
 }
 
 func (s *queueJSONStatements) DeleteQueueJSON(
-	ctx context.Context, txn *sql.Tx, nids []int64,
+	ctx context.Context, txn *sql.Tx, jsonNIDs []types.ContentNID,
 ) error {
 	stmt := sqlutil.TxStmt(txn, s.deleteJSONStmt)
+	nids := make([]int64, 0, len(jsonNIDs))
+	for _, n := range jsonNIDs {
+		nids = append(nids, int64(n))
+	}
 	_, err := stmt.ExecContext(ctx, pq.Int64Array(nids))
 	return err
 }
 
 func (s *queueJSONStatements) SelectQueueJSON(
-	ctx context.Context, txn *sql.Tx, jsonNIDs []int64,
+	ctx context.Context, txn *sql.Tx, jsonNIDs []types.ContentNID,
-) (map[int64][]byte, error) {
+) (map[types.ContentNID][]byte, error) {
-	blobs := map[int64][]byte{}
+	blobs := map[types.ContentNID][]byte{}
 	stmt := sqlutil.TxStmt(txn, s.selectJSONStmt)
-	rows, err := stmt.QueryContext(ctx, pq.Int64Array(jsonNIDs))
+	nids := make([]int64, 0, len(jsonNIDs))
+	for _, n := range jsonNIDs {
+		nids = append(nids, int64(n))
+	}
+	rows, err := stmt.QueryContext(ctx, pq.Int64Array(nids))
 	if err != nil {
 		return nil, err
 	}
 	defer internal.CloseAndLogIfError(ctx, rows, "selectJSON: rows.close() failed")
 	for rows.Next() {
-		var nid int64
+		var nid types.ContentNID
 		var blob []byte
 		if err = rows.Scan(&nid, &blob); err != nil {
 			return nil, err

federationsender/storage/postgres/queue_pdus_table.go

@@ -19,6 +19,7 @@ import (
 	"database/sql"
 
 	"github.com/lib/pq"
+	"github.com/matrix-org/dendrite/federationsender/types"
 	"github.com/matrix-org/dendrite/internal"
 	"github.com/matrix-org/dendrite/internal/sqlutil"
 	"github.com/matrix-org/gomatrixserverlib"
@@ -105,7 +106,7 @@ func (s *queuePDUsStatements) InsertQueuePDU(
 	txn *sql.Tx,
 	transactionID gomatrixserverlib.TransactionID,
 	serverName gomatrixserverlib.ServerName,
-	nid int64,
+	nid types.ContentNID,
 ) error {
 	stmt := sqlutil.TxStmt(txn, s.insertQueuePDUStmt)
 	_, err := stmt.ExecContext(
@@ -120,17 +121,21 @@ func (s *queuePDUsStatements) InsertQueuePDU(
 func (s *queuePDUsStatements) DeleteQueuePDUs(
 	ctx context.Context, txn *sql.Tx,
 	serverName gomatrixserverlib.ServerName,
-	jsonNIDs []int64,
+	jsonNIDs []types.ContentNID,
 ) error {
 	stmt := sqlutil.TxStmt(txn, s.deleteQueuePDUsStmt)
-	_, err := stmt.ExecContext(ctx, serverName, pq.Int64Array(jsonNIDs))
+	nids := make([]int64, 0, len(jsonNIDs))
+	for _, n := range jsonNIDs {
+		nids = append(nids, int64(n))
+	}
+	_, err := stmt.ExecContext(ctx, serverName, pq.Int64Array(nids))
 	return err
 }
 
 func (s *queuePDUsStatements) SelectQueuePDUReferenceJSONCount(
-	ctx context.Context, txn *sql.Tx, jsonNID int64,
+	ctx context.Context, txn *sql.Tx, jsonNID types.ContentNID,
-) (int64, error) {
+) (types.ContentNID, error) {
-	var count int64
+	var count types.ContentNID
 	stmt := sqlutil.TxStmt(txn, s.selectQueuePDUReferenceJSONCountStmt)
 	err := stmt.QueryRowContext(ctx, jsonNID).Scan(&count)
 	if err == sql.ErrNoRows {
@@ -144,8 +149,8 @@ func (s *queuePDUsStatements) SelectQueuePDUReferenceJSONCount(
 
 func (s *queuePDUsStatements) SelectQueuePDUCount(
 	ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName,
-) (int64, error) {
+) (types.ContentNID, error) {
-	var count int64
+	var count types.ContentNID
 	stmt := sqlutil.TxStmt(txn, s.selectQueuePDUsCountStmt)
 	err := stmt.QueryRowContext(ctx, serverName).Scan(&count)
 	if err == sql.ErrNoRows {
@@ -161,16 +166,16 @@ func (s *queuePDUsStatements) SelectQueuePDUs(
 	ctx context.Context, txn *sql.Tx,
 	serverName gomatrixserverlib.ServerName,
 	limit int,
-) ([]int64, error) {
+) ([]types.ContentNID, error) {
 	stmt := sqlutil.TxStmt(txn, s.selectQueuePDUsStmt)
 	rows, err := stmt.QueryContext(ctx, serverName, limit)
 	if err != nil {
 		return nil, err
 	}
 	defer internal.CloseAndLogIfError(ctx, rows, "queueFromStmt: rows.close() failed")
-	var result []int64
+	var result []types.ContentNID
 	for rows.Next() {
-		var nid int64
+		var nid types.ContentNID
 		if err = rows.Scan(&nid); err != nil {
 			return nil, err
 		}

federationsender/storage/postgres/storage.go

@@ -19,7 +19,6 @@ import (
 	"database/sql"
 
 	"github.com/matrix-org/dendrite/federationsender/storage/shared"
-	"github.com/matrix-org/dendrite/internal/caching"
 	"github.com/matrix-org/dendrite/internal/sqlutil"
 	"github.com/matrix-org/dendrite/setup/config"
 )
@@ -33,7 +32,7 @@ type Database struct {
 }
 
 // NewDatabase opens a new database
-func NewDatabase(dbProperties *config.DatabaseOptions, cache caching.FederationSenderCache) (*Database, error) {
+func NewDatabase(dbProperties *config.DatabaseOptions) (*Database, error) {
 	var d Database
 	var err error
 	if d.db, err = sqlutil.Open(dbProperties); err != nil {
@@ -66,7 +65,6 @@ func NewDatabase(dbProperties *config.DatabaseOptions, cache caching.FederationS
 	}
 	d.Database = shared.Database{
 		DB:                          d.db,
-		Cache:                       cache,
 		Writer:                      d.writer,
 		FederationSenderJoinedHosts: joinedHosts,
 		FederationSenderQueuePDUs:   queuePDUs,

federationsender/storage/shared/storage.go

@@ -21,14 +21,12 @@ import (
 
 	"github.com/matrix-org/dendrite/federationsender/storage/tables"
 	"github.com/matrix-org/dendrite/federationsender/types"
-	"github.com/matrix-org/dendrite/internal/caching"
 	"github.com/matrix-org/dendrite/internal/sqlutil"
 	"github.com/matrix-org/gomatrixserverlib"
 )
 
 type Database struct {
 	DB                          *sql.DB
-	Cache                       caching.FederationSenderCache
 	Writer                      sqlutil.Writer
 	FederationSenderQueuePDUs   tables.FederationSenderQueuePDUs
 	FederationSenderQueueEDUs   tables.FederationSenderQueueEDUs
@@ -38,18 +36,6 @@ type Database struct {
 	FederationSenderBlacklist   tables.FederationSenderBlacklist
 }
 
-// An Receipt contains the NIDs of a call to GetNextTransactionPDUs/EDUs.
-// We don't actually export the NIDs but we need the caller to be able
-// to pass them back so that we can clean up if the transaction sends
-// successfully.
-type Receipt struct {
-	nid int64
-}
-
-func (r *Receipt) String() string {
-	return fmt.Sprintf("%d", r.nid)
-}
-
 // UpdateRoom updates the joined hosts for a room and returns what the joined
 // hosts were before the update, or nil if this was a duplicate message.
 // This is called when we receive a message from kafka, so we pass in
@@ -129,19 +115,17 @@ func (d *Database) GetJoinedHostsForRooms(ctx context.Context, roomIDs []string)
 // metadata entries.
 func (d *Database) StoreJSON(
 	ctx context.Context, js string,
-) (*Receipt, error) {
+) (types.ContentNID, error) {
-	var nid int64
+	var nid types.ContentNID
 	var err error
 	_ = d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
 		nid, err = d.FederationSenderQueueJSON.InsertQueueJSON(ctx, txn, js)
 		return err
 	})
 	if err != nil {
-		return nil, fmt.Errorf("d.insertQueueJSON: %w", err)
+		return 0, fmt.Errorf("d.insertQueueJSON: %w", err)
 	}
-	return &Receipt{
+	return nid, nil
-		nid: nid,
-	}, nil
 }
 
 func (d *Database) PurgeRoomState(

federationsender/storage/shared/storage_edus.go

@@ -21,6 +21,7 @@ import (
 	"errors"
 	"fmt"
 
+	"github.com/matrix-org/dendrite/federationsender/types"
 	"github.com/matrix-org/gomatrixserverlib"
 )
 
@@ -30,7 +31,7 @@ import (
 func (d *Database) AssociateEDUWithDestination(
 	ctx context.Context,
 	serverName gomatrixserverlib.ServerName,
-	receipt *Receipt,
+	nid types.ContentNID,
 ) error {
 	return d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
 		if err := d.FederationSenderQueueEDUs.InsertQueueEDU(
@@ -38,7 +39,7 @@ func (d *Database) AssociateEDUWithDestination(
 			txn,        // SQL transaction
 			"",         // TODO: EDU type for coalescing
 			serverName, // destination server name
-			receipt.nid, // NID from the federationsender_queue_json table
+			nid,        // NID from the federationsender_queue_json table
 		); err != nil {
 			return fmt.Errorf("InsertQueueEDU: %w", err)
 		}
@@ -53,26 +54,17 @@ func (d *Database) GetPendingEDUs(
 	serverName gomatrixserverlib.ServerName,
 	limit int,
 ) (
-	edus map[*Receipt]*gomatrixserverlib.EDU,
+	edus map[types.ContentNID]*gomatrixserverlib.EDU,
 	err error,
 ) {
-	edus = make(map[*Receipt]*gomatrixserverlib.EDU)
+	edus = make(map[types.ContentNID]*gomatrixserverlib.EDU)
 	err = d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
 		nids, err := d.FederationSenderQueueEDUs.SelectQueueEDUs(ctx, txn, serverName, limit)
 		if err != nil {
 			return fmt.Errorf("SelectQueueEDUs: %w", err)
 		}
 
-		retrieve := make([]int64, 0, len(nids))
+		blobs, err := d.FederationSenderQueueJSON.SelectQueueJSON(ctx, txn, nids)
-		for _, nid := range nids {
-			if edu, ok := d.Cache.GetFederationSenderQueuedEDU(nid); ok {
-				edus[&Receipt{nid}] = edu
-			} else {
-				retrieve = append(retrieve, nid)
-			}
-		}
-
-		blobs, err := d.FederationSenderQueueJSON.SelectQueueJSON(ctx, txn, retrieve)
 		if err != nil {
 			return fmt.Errorf("SelectQueueJSON: %w", err)
 		}
@@ -82,7 +74,7 @@ func (d *Database) GetPendingEDUs(
 			if err := json.Unmarshal(blob, &event); err != nil {
 				return fmt.Errorf("json.Unmarshal: %w", err)
 			}
-			edus[&Receipt{nid}] = &event
+			edus[nid] = &event
 		}
 
 		return nil
@@ -95,15 +87,10 @@ func (d *Database) GetPendingEDUs(
 func (d *Database) CleanEDUs(
 	ctx context.Context,
 	serverName gomatrixserverlib.ServerName,
-	receipts []*Receipt,
+	nids []types.ContentNID,
 ) error {
-	if len(receipts) == 0 {
+	if len(nids) == 0 {
-		return errors.New("expected receipt")
+		return errors.New("expected one or more NIDs")
-	}
-
-	nids := make([]int64, len(receipts))
-	for i := range receipts {
-		nids[i] = receipts[i].nid
 	}
 
 	return d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
@@ -111,7 +98,7 @@ func (d *Database) CleanEDUs(
 			return err
 		}
 
-		var deleteNIDs []int64
+		var deleteNIDs []types.ContentNID
 		for _, nid := range nids {
 			count, err := d.FederationSenderQueueEDUs.SelectQueueEDUReferenceJSONCount(ctx, txn, nid)
 			if err != nil {
@@ -119,7 +106,6 @@ func (d *Database) CleanEDUs(
 			}
 			if count == 0 {
 				deleteNIDs = append(deleteNIDs, nid)
-				d.Cache.EvictFederationSenderQueuedEDU(nid)
 			}
 		}
 
@@ -138,7 +124,7 @@ func (d *Database) CleanEDUs(
 func (d *Database) GetPendingEDUCount(
 	ctx context.Context,
 	serverName gomatrixserverlib.ServerName,
-) (int64, error) {
+) (types.ContentNID, error) {
 	return d.FederationSenderQueueEDUs.SelectQueueEDUCount(ctx, nil, serverName)
 }
 

federationsender/storage/shared/storage_pdus.go

@@ -21,6 +21,7 @@ import (
 	"errors"
 	"fmt"
 
+	"github.com/matrix-org/dendrite/federationsender/types"
 	"github.com/matrix-org/gomatrixserverlib"
 )
 
@@ -31,7 +32,7 @@ func (d *Database) AssociatePDUWithDestination(
 	ctx context.Context,
 	transactionID gomatrixserverlib.TransactionID,
 	serverName gomatrixserverlib.ServerName,
-	receipt *Receipt,
+	nid types.ContentNID,
 ) error {
 	return d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
 		if err := d.FederationSenderQueuePDUs.InsertQueuePDU(
@@ -39,7 +40,7 @@ func (d *Database) AssociatePDUWithDestination(
 			txn,           // SQL transaction
 			transactionID, // transaction ID
 			serverName,    // destination server name
-			receipt.nid,   // NID from the federationsender_queue_json table
+			nid,           // NID from the federationsender_queue_json table
 		); err != nil {
 			return fmt.Errorf("InsertQueuePDU: %w", err)
 		}
@@ -54,7 +55,7 @@ func (d *Database) GetPendingPDUs(
 	serverName gomatrixserverlib.ServerName,
 	limit int,
 ) (
-	events map[*Receipt]*gomatrixserverlib.HeaderedEvent,
+	events map[types.ContentNID]*gomatrixserverlib.HeaderedEvent,
 	err error,
 ) {
 	// Strictly speaking this doesn't need to be using the writer
@@ -62,23 +63,14 @@ func (d *Database) GetPendingPDUs(
 	// a guarantee of transactional isolation, it's actually useful
 	// to know in SQLite mode that nothing else is trying to modify
 	// the database.
-	events = make(map[*Receipt]*gomatrixserverlib.HeaderedEvent)
+	events = make(map[types.ContentNID]*gomatrixserverlib.HeaderedEvent)
 	err = d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
 		nids, err := d.FederationSenderQueuePDUs.SelectQueuePDUs(ctx, txn, serverName, limit)
 		if err != nil {
 			return fmt.Errorf("SelectQueuePDUs: %w", err)
 		}
 
-		retrieve := make([]int64, 0, len(nids))
+		blobs, err := d.FederationSenderQueueJSON.SelectQueueJSON(ctx, txn, nids)
-		for _, nid := range nids {
-			if event, ok := d.Cache.GetFederationSenderQueuedPDU(nid); ok {
-				events[&Receipt{nid}] = event
-			} else {
-				retrieve = append(retrieve, nid)
-			}
-		}
-
-		blobs, err := d.FederationSenderQueueJSON.SelectQueueJSON(ctx, txn, retrieve)
 		if err != nil {
 			return fmt.Errorf("SelectQueueJSON: %w", err)
 		}
@@ -88,8 +80,7 @@ func (d *Database) GetPendingPDUs(
 			if err := json.Unmarshal(blob, &event); err != nil {
 				return fmt.Errorf("json.Unmarshal: %w", err)
 			}
-			events[&Receipt{nid}] = &event
+			events[nid] = &event
-			d.Cache.StoreFederationSenderQueuedPDU(nid, &event)
 		}
 
 		return nil
@@ -103,15 +94,10 @@ func (d *Database) GetPendingPDUs(
 func (d *Database) CleanPDUs(
 	ctx context.Context,
 	serverName gomatrixserverlib.ServerName,
-	receipts []*Receipt,
+	nids []types.ContentNID,
 ) error {
-	if len(receipts) == 0 {
+	if len(nids) == 0 {
-		return errors.New("expected receipt")
+		return errors.New("expected one or more ContentNIDs")
-	}
-
-	nids := make([]int64, len(receipts))
-	for i := range receipts {
-		nids[i] = receipts[i].nid
 	}
 
 	return d.Writer.Do(d.DB, nil, func(txn *sql.Tx) error {
@@ -119,7 +105,7 @@ func (d *Database) CleanPDUs(
 			return err
 		}
 
-		var deleteNIDs []int64
+		var deleteNIDs []types.ContentNID
 		for _, nid := range nids {
 			count, err := d.FederationSenderQueuePDUs.SelectQueuePDUReferenceJSONCount(ctx, txn, nid)
 			if err != nil {
@@ -127,7 +113,6 @@ func (d *Database) CleanPDUs(
 			}
 			if count == 0 {
 				deleteNIDs = append(deleteNIDs, nid)
-				d.Cache.EvictFederationSenderQueuedPDU(nid)
 			}
 		}
 
@@ -146,7 +131,7 @@ func (d *Database) CleanPDUs(
 func (d *Database) GetPendingPDUCount(
 	ctx context.Context,
 	serverName gomatrixserverlib.ServerName,
-) (int64, error) {
+) (types.ContentNID, error) {
 	return d.FederationSenderQueuePDUs.SelectQueuePDUCount(ctx, nil, serverName)
 }
 

federationsender/storage/sqlite3/queue_edus_table.go

@@ -20,6 +20,7 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/matrix-org/dendrite/federationsender/types"
 	"github.com/matrix-org/dendrite/internal"
 	"github.com/matrix-org/dendrite/internal/sqlutil"
 	"github.com/matrix-org/gomatrixserverlib"
@@ -102,7 +103,7 @@ func (s *queueEDUsStatements) InsertQueueEDU(
 	txn *sql.Tx,
 	eduType string,
 	serverName gomatrixserverlib.ServerName,
-	nid int64,
+	nid types.ContentNID,
 ) error {
 	stmt := sqlutil.TxStmt(txn, s.insertQueueEDUStmt)
 	_, err := stmt.ExecContext(
@@ -117,7 +118,7 @@ func (s *queueEDUsStatements) InsertQueueEDU(
 func (s *queueEDUsStatements) DeleteQueueEDUs(
 	ctx context.Context, txn *sql.Tx,
 	serverName gomatrixserverlib.ServerName,
-	jsonNIDs []int64,
+	jsonNIDs []types.ContentNID,
 ) error {
 	deleteSQL := strings.Replace(deleteQueueEDUsSQL, "($2)", sqlutil.QueryVariadicOffset(len(jsonNIDs), 1), 1)
 	deleteStmt, err := txn.Prepare(deleteSQL)
@@ -140,16 +141,16 @@ func (s *queueEDUsStatements) SelectQueueEDUs(
 	ctx context.Context, txn *sql.Tx,
 	serverName gomatrixserverlib.ServerName,
 	limit int,
-) ([]int64, error) {
+) ([]types.ContentNID, error) {
 	stmt := sqlutil.TxStmt(txn, s.selectQueueEDUStmt)
 	rows, err := stmt.QueryContext(ctx, serverName, limit)
 	if err != nil {
 		return nil, err
 	}
 	defer internal.CloseAndLogIfError(ctx, rows, "queueFromStmt: rows.close() failed")
-	var result []int64
+	var result []types.ContentNID
 	for rows.Next() {
-		var nid int64
+		var nid types.ContentNID
 		if err = rows.Scan(&nid); err != nil {
 			return nil, err
 		}
@@ -159,9 +160,9 @@ func (s *queueEDUsStatements) SelectQueueEDUs(
 }
 
 func (s *queueEDUsStatements) SelectQueueEDUReferenceJSONCount(
-	ctx context.Context, txn *sql.Tx, jsonNID int64,
+	ctx context.Context, txn *sql.Tx, jsonNID types.ContentNID,
-) (int64, error) {
+) (types.ContentNID, error) {
-	var count int64
+	var count types.ContentNID
 	stmt := sqlutil.TxStmt(txn, s.selectQueueEDUReferenceJSONCountStmt)
 	err := stmt.QueryRowContext(ctx, jsonNID).Scan(&count)
 	if err == sql.ErrNoRows {
@@ -172,8 +173,8 @@ func (s *queueEDUsStatements) SelectQueueEDUReferenceJSONCount(
 
 func (s *queueEDUsStatements) SelectQueueEDUCount(
 	ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName,
-) (int64, error) {
+) (types.ContentNID, error) {
-	var count int64
+	var count types.ContentNID
 	stmt := sqlutil.TxStmt(txn, s.selectQueueEDUCountStmt)
 	err := stmt.QueryRowContext(ctx, serverName).Scan(&count)
 	if err == sql.ErrNoRows {

federationsender/storage/sqlite3/queue_json_table.go

@@ -21,6 +21,7 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/matrix-org/dendrite/federationsender/types"
 	"github.com/matrix-org/dendrite/internal"
 	"github.com/matrix-org/dendrite/internal/sqlutil"
 )
@@ -71,21 +72,21 @@ func NewSQLiteQueueJSONTable(db *sql.DB) (s *queueJSONStatements, err error) {
 
 func (s *queueJSONStatements) InsertQueueJSON(
 	ctx context.Context, txn *sql.Tx, json string,
-) (lastid int64, err error) {
+) (types.ContentNID, error) {
 	stmt := sqlutil.TxStmt(txn, s.insertJSONStmt)
 	res, err := stmt.ExecContext(ctx, json)
 	if err != nil {
 		return 0, fmt.Errorf("stmt.QueryContext: %w", err)
 	}
-	lastid, err = res.LastInsertId()
+	lastid, err := res.LastInsertId()
 	if err != nil {
 		return 0, fmt.Errorf("res.LastInsertId: %w", err)
 	}
-	return
+	return types.ContentNID(lastid), nil
 }
 
 func (s *queueJSONStatements) DeleteQueueJSON(
-	ctx context.Context, txn *sql.Tx, nids []int64,
+	ctx context.Context, txn *sql.Tx, nids []types.ContentNID,
 ) error {
 	deleteSQL := strings.Replace(deleteJSONSQL, "($1)", sqlutil.QueryVariadic(len(nids)), 1)
 	deleteStmt, err := txn.Prepare(deleteSQL)
@@ -104,8 +105,8 @@ func (s *queueJSONStatements) DeleteQueueJSON(
 }
 
 func (s *queueJSONStatements) SelectQueueJSON(
-	ctx context.Context, txn *sql.Tx, jsonNIDs []int64,
+	ctx context.Context, txn *sql.Tx, jsonNIDs []types.ContentNID,
-) (map[int64][]byte, error) {
+) (map[types.ContentNID][]byte, error) {
 	selectSQL := strings.Replace(selectJSONSQL, "($1)", sqlutil.QueryVariadic(len(jsonNIDs)), 1)
 	selectStmt, err := txn.Prepare(selectSQL)
 	if err != nil {
@@ -117,7 +118,7 @@ func (s *queueJSONStatements) SelectQueueJSON(
 		iNIDs[k] = v
 	}
 
-	blobs := map[int64][]byte{}
+	blobs := map[types.ContentNID][]byte{}
 	stmt := sqlutil.TxStmt(txn, selectStmt)
 	rows, err := stmt.QueryContext(ctx, iNIDs...)
 	if err != nil {
@@ -125,7 +126,7 @@ func (s *queueJSONStatements) SelectQueueJSON(
 	}
 	defer internal.CloseAndLogIfError(ctx, rows, "selectJSON: rows.close() failed")
 	for rows.Next() {
-		var nid int64
+		var nid types.ContentNID
 		var blob []byte
 		if err = rows.Scan(&nid, &blob); err != nil {
 			return nil, fmt.Errorf("s.selectQueueJSON rows.Scan: %w", err)

federationsender/storage/sqlite3/queue_pdus_table.go

@@ -21,6 +21,7 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/matrix-org/dendrite/federationsender/types"
 	"github.com/matrix-org/dendrite/internal"
 	"github.com/matrix-org/dendrite/internal/sqlutil"
 	"github.com/matrix-org/gomatrixserverlib"
@@ -117,7 +118,7 @@ func (s *queuePDUsStatements) InsertQueuePDU(
 	txn *sql.Tx,
 	transactionID gomatrixserverlib.TransactionID,
 	serverName gomatrixserverlib.ServerName,
-	nid int64,
+	nid types.ContentNID,
 ) error {
 	stmt := sqlutil.TxStmt(txn, s.insertQueuePDUStmt)
 	_, err := stmt.ExecContext(
@@ -132,7 +133,7 @@ func (s *queuePDUsStatements) InsertQueuePDU(
 func (s *queuePDUsStatements) DeleteQueuePDUs(
 	ctx context.Context, txn *sql.Tx,
 	serverName gomatrixserverlib.ServerName,
-	jsonNIDs []int64,
+	jsonNIDs []types.ContentNID,
 ) error {
 	deleteSQL := strings.Replace(deleteQueuePDUsSQL, "($2)", sqlutil.QueryVariadicOffset(len(jsonNIDs), 1), 1)
 	deleteStmt, err := txn.Prepare(deleteSQL)
@@ -164,9 +165,9 @@ func (s *queuePDUsStatements) SelectQueuePDUNextTransactionID(
 }
 
 func (s *queuePDUsStatements) SelectQueuePDUReferenceJSONCount(
-	ctx context.Context, txn *sql.Tx, jsonNID int64,
+	ctx context.Context, txn *sql.Tx, jsonNID types.ContentNID,
-) (int64, error) {
+) (types.ContentNID, error) {
-	var count int64
+	var count types.ContentNID
 	stmt := sqlutil.TxStmt(txn, s.selectQueueReferenceJSONCountStmt)
 	err := stmt.QueryRowContext(ctx, jsonNID).Scan(&count)
 	if err == sql.ErrNoRows {
@@ -177,8 +178,8 @@ func (s *queuePDUsStatements) SelectQueuePDUReferenceJSONCount(
 
 func (s *queuePDUsStatements) SelectQueuePDUCount(
 	ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName,
-) (int64, error) {
+) (types.ContentNID, error) {
-	var count int64
+	var count types.ContentNID
 	stmt := sqlutil.TxStmt(txn, s.selectQueuePDUsCountStmt)
 	err := stmt.QueryRowContext(ctx, serverName).Scan(&count)
 	if err == sql.ErrNoRows {
@@ -194,16 +195,16 @@ func (s *queuePDUsStatements) SelectQueuePDUs(
 	ctx context.Context, txn *sql.Tx,
 	serverName gomatrixserverlib.ServerName,
 	limit int,
-) ([]int64, error) {
+) ([]types.ContentNID, error) {
 	stmt := sqlutil.TxStmt(txn, s.selectQueuePDUsStmt)
 	rows, err := stmt.QueryContext(ctx, serverName, limit)
 	if err != nil {
 		return nil, err
 	}
 	defer internal.CloseAndLogIfError(ctx, rows, "queueFromStmt: rows.close() failed")
-	var result []int64
+	var result []types.ContentNID
 	for rows.Next() {
-		var nid int64
+		var nid types.ContentNID
 		if err = rows.Scan(&nid); err != nil {
 			return nil, err
 		}

federationsender/storage/sqlite3/storage.go

@@ -21,7 +21,6 @@ import (
 	_ "github.com/mattn/go-sqlite3"
 
 	"github.com/matrix-org/dendrite/federationsender/storage/shared"
-	"github.com/matrix-org/dendrite/internal/caching"
 	"github.com/matrix-org/dendrite/internal/sqlutil"
 	"github.com/matrix-org/dendrite/setup/config"
 )
@@ -35,7 +34,7 @@ type Database struct {
 }
 
 // NewDatabase opens a new database
-func NewDatabase(dbProperties *config.DatabaseOptions, cache caching.FederationSenderCache) (*Database, error) {
+func NewDatabase(dbProperties *config.DatabaseOptions) (*Database, error) {
 	var d Database
 	var err error
 	if d.db, err = sqlutil.Open(dbProperties); err != nil {
@@ -68,7 +67,6 @@ func NewDatabase(dbProperties *config.DatabaseOptions, cache caching.FederationS
 	}
 	d.Database = shared.Database{
 		DB:                          d.db,
-		Cache:                       cache,
 		Writer:                      d.writer,
 		FederationSenderJoinedHosts: joinedHosts,
 		FederationSenderQueuePDUs:   queuePDUs,

federationsender/storage/storage.go

@@ -21,17 +21,16 @@ import (
 
 	"github.com/matrix-org/dendrite/federationsender/storage/postgres"
 	"github.com/matrix-org/dendrite/federationsender/storage/sqlite3"
-	"github.com/matrix-org/dendrite/internal/caching"
 	"github.com/matrix-org/dendrite/setup/config"
 )
 
 // NewDatabase opens a new database
-func NewDatabase(dbProperties *config.DatabaseOptions, cache caching.FederationSenderCache) (Database, error) {
+func NewDatabase(dbProperties *config.DatabaseOptions) (Database, error) {
 	switch {
 	case dbProperties.ConnectionString.IsSQLite():
-		return sqlite3.NewDatabase(dbProperties, cache)
+		return sqlite3.NewDatabase(dbProperties)
 	case dbProperties.ConnectionString.IsPostgres():
-		return postgres.NewDatabase(dbProperties, cache)
+		return postgres.NewDatabase(dbProperties)
 	default:
 		return nil, fmt.Errorf("unexpected database type")
 	}

federationsender/storage/tables/interface.go

@@ -23,27 +23,27 @@ import (
 )
 
 type FederationSenderQueuePDUs interface {
-	InsertQueuePDU(ctx context.Context, txn *sql.Tx, transactionID gomatrixserverlib.TransactionID, serverName gomatrixserverlib.ServerName, nid int64) error
+	InsertQueuePDU(ctx context.Context, txn *sql.Tx, transactionID gomatrixserverlib.TransactionID, serverName gomatrixserverlib.ServerName, nid types.ContentNID) error
-	DeleteQueuePDUs(ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName, jsonNIDs []int64) error
+	DeleteQueuePDUs(ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName, jsonNIDs []types.ContentNID) error
-	SelectQueuePDUReferenceJSONCount(ctx context.Context, txn *sql.Tx, jsonNID int64) (int64, error)
+	SelectQueuePDUReferenceJSONCount(ctx context.Context, txn *sql.Tx, jsonNID types.ContentNID) (types.ContentNID, error)
-	SelectQueuePDUCount(ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName) (int64, error)
+	SelectQueuePDUCount(ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName) (types.ContentNID, error)
-	SelectQueuePDUs(ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName, limit int) ([]int64, error)
+	SelectQueuePDUs(ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName, limit int) ([]types.ContentNID, error)
 	SelectQueuePDUServerNames(ctx context.Context, txn *sql.Tx) ([]gomatrixserverlib.ServerName, error)
 }
 
 type FederationSenderQueueEDUs interface {
-	InsertQueueEDU(ctx context.Context, txn *sql.Tx, eduType string, serverName gomatrixserverlib.ServerName, nid int64) error
+	InsertQueueEDU(ctx context.Context, txn *sql.Tx, eduType string, serverName gomatrixserverlib.ServerName, nid types.ContentNID) error
-	DeleteQueueEDUs(ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName, jsonNIDs []int64) error
+	DeleteQueueEDUs(ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName, jsonNIDs []types.ContentNID) error
-	SelectQueueEDUs(ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName, limit int) ([]int64, error)
+	SelectQueueEDUs(ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName, limit int) ([]types.ContentNID, error)
-	SelectQueueEDUReferenceJSONCount(ctx context.Context, txn *sql.Tx, jsonNID int64) (int64, error)
+	SelectQueueEDUReferenceJSONCount(ctx context.Context, txn *sql.Tx, jsonNID types.ContentNID) (types.ContentNID, error)
-	SelectQueueEDUCount(ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName) (int64, error)
+	SelectQueueEDUCount(ctx context.Context, txn *sql.Tx, serverName gomatrixserverlib.ServerName) (types.ContentNID, error)
 	SelectQueueEDUServerNames(ctx context.Context, txn *sql.Tx) ([]gomatrixserverlib.ServerName, error)
 }
 
 type FederationSenderQueueJSON interface {
-	InsertQueueJSON(ctx context.Context, txn *sql.Tx, json string) (int64, error)
+	InsertQueueJSON(ctx context.Context, txn *sql.Tx, json string) (types.ContentNID, error)
-	DeleteQueueJSON(ctx context.Context, txn *sql.Tx, nids []int64) error
+	DeleteQueueJSON(ctx context.Context, txn *sql.Tx, nids []types.ContentNID) error
-	SelectQueueJSON(ctx context.Context, txn *sql.Tx, jsonNIDs []int64) (map[int64][]byte, error)
+	SelectQueueJSON(ctx context.Context, txn *sql.Tx, jsonNIDs []types.ContentNID) (map[types.ContentNID][]byte, error)
 }
 
 type FederationSenderJoinedHosts interface {

federationsender/types/types.go

@@ -20,6 +20,8 @@ import (
 	"github.com/matrix-org/gomatrixserverlib"
 )
 
+type ContentNID int64
+
 // A JoinedHost is a server that is joined to a matrix room.
 type JoinedHost struct {
 	// The MemberEventID of a m.room.member join event.

internal/caching/cache_federationevents.go

@@ -1,67 +0,0 @@
-package caching
-
-import (
-	"fmt"
-
-	"github.com/matrix-org/gomatrixserverlib"
-)
-
-const (
-	FederationEventCacheName       = "federation_event"
-	FederationEventCacheMaxEntries = 256
-	FederationEventCacheMutable    = true // to allow use of Unset only
-)
-
-// FederationSenderCache contains the subset of functions needed for
-// a federation event cache.
-type FederationSenderCache interface {
-	GetFederationSenderQueuedPDU(eventNID int64) (event *gomatrixserverlib.HeaderedEvent, ok bool)
-	StoreFederationSenderQueuedPDU(eventNID int64, event *gomatrixserverlib.HeaderedEvent)
-	EvictFederationSenderQueuedPDU(eventNID int64)
-
-	GetFederationSenderQueuedEDU(eventNID int64) (event *gomatrixserverlib.EDU, ok bool)
-	StoreFederationSenderQueuedEDU(eventNID int64, event *gomatrixserverlib.EDU)
-	EvictFederationSenderQueuedEDU(eventNID int64)
-}
-
-func (c Caches) GetFederationSenderQueuedPDU(eventNID int64) (*gomatrixserverlib.HeaderedEvent, bool) {
-	key := fmt.Sprintf("%d", eventNID)
-	val, found := c.FederationEvents.Get(key)
-	if found && val != nil {
-		if event, ok := val.(*gomatrixserverlib.HeaderedEvent); ok {
-			return event, true
-		}
-	}
-	return nil, false
-}
-
-func (c Caches) StoreFederationSenderQueuedPDU(eventNID int64, event *gomatrixserverlib.HeaderedEvent) {
-	key := fmt.Sprintf("%d", eventNID)
-	c.FederationEvents.Set(key, event)
-}
-
-func (c Caches) EvictFederationSenderQueuedPDU(eventNID int64) {
-	key := fmt.Sprintf("%d", eventNID)
-	c.FederationEvents.Unset(key)
-}
-
-func (c Caches) GetFederationSenderQueuedEDU(eventNID int64) (*gomatrixserverlib.EDU, bool) {
-	key := fmt.Sprintf("%d", eventNID)
-	val, found := c.FederationEvents.Get(key)
-	if found && val != nil {
-		if event, ok := val.(*gomatrixserverlib.EDU); ok {
-			return event, true
-		}
-	}
-	return nil, false
-}
-
-func (c Caches) StoreFederationSenderQueuedEDU(eventNID int64, event *gomatrixserverlib.EDU) {
-	key := fmt.Sprintf("%d", eventNID)
-	c.FederationEvents.Set(key, event)
-}
-
-func (c Caches) EvictFederationSenderQueuedEDU(eventNID int64) {
-	key := fmt.Sprintf("%d", eventNID)
-	c.FederationEvents.Unset(key)
-}

internal/caching/caches.go

@@ -10,7 +10,6 @@ type Caches struct {
 	RoomServerEventTypeNIDs Cache // RoomServerNIDsCache
 	RoomServerRoomNIDs      Cache // RoomServerNIDsCache
 	RoomServerRoomIDs       Cache // RoomServerNIDsCache
-	FederationEvents        Cache // FederationEventsCache
 }
 
 // Cache is the interface that an implementation must satisfy.

internal/caching/impl_inmemorylru.go

@@ -63,15 +63,6 @@ func NewInMemoryLRUCache(enablePrometheus bool) (*Caches, error) {
 	if err != nil {
 		return nil, err
 	}
-	federationEvents, err := NewInMemoryLRUCachePartition(
-		FederationEventCacheName,
-		FederationEventCacheMutable,
-		FederationEventCacheMaxEntries,
-		enablePrometheus,
-	)
-	if err != nil {
-		return nil, err
-	}
 	return &Caches{
 		RoomVersions:            roomVersions,
 		ServerKeys:              serverKeys,
@@ -79,7 +70,6 @@ func NewInMemoryLRUCache(enablePrometheus bool) (*Caches, error) {
 		RoomServerEventTypeNIDs: roomServerEventTypeNIDs,
 		RoomServerRoomNIDs:      roomServerRoomNIDs,
 		RoomServerRoomIDs:       roomServerRoomIDs,
-		FederationEvents:        federationEvents,
 	}, nil
 }