diff --git a/syncapi/storage/shared/syncserver.go b/syncapi/storage/shared/syncserver.go
new file mode 100644
index 000000000..e89976df6
--- /dev/null
+++ b/syncapi/storage/shared/syncserver.go
@@ -0,0 +1,37 @@
+package shared
+
+import (
+	"context"
+	"database/sql"
+
+	"github.com/matrix-org/dendrite/common"
+	"github.com/matrix-org/dendrite/syncapi/storage/tables"
+	"github.com/matrix-org/dendrite/syncapi/types"
+	"github.com/matrix-org/gomatrixserverlib"
+)
+
+// Database is a temporary struct until we have made syncserver.go the same for both pq/sqlite
+// For now this contains the shared functions
+type Database struct {
+	DB      *sql.DB
+	Invites tables.Invites
+}
+
+func (d *Database) AddInviteEvent(
+	ctx context.Context, inviteEvent gomatrixserverlib.HeaderedEvent,
+) (sp types.StreamPosition, err error) {
+	err = common.WithTransaction(d.DB, func(txn *sql.Tx) error {
+		sp, err = d.Invites.InsertInviteEvent(ctx, txn, inviteEvent)
+		return err
+	})
+	return
+}
+
+func (d *Database) RetireInviteEvent(
+	ctx context.Context, inviteEventID string,
+) error {
+	// TODO: Record that invite has been retired in a stream so that we can
+	// notify the user in an incremental sync.
+	err := d.Invites.DeleteInviteEvent(ctx, inviteEventID)
+	return err
+}
diff --git a/syncapi/storage/tables/interface.go b/syncapi/storage/tables/interface.go
new file mode 100644
index 000000000..1a9940524
--- /dev/null
+++ b/syncapi/storage/tables/interface.go
@@ -0,0 +1,16 @@
+package tables
+
+import (
+	"context"
+	"database/sql"
+
+	"github.com/matrix-org/dendrite/syncapi/types"
+	"github.com/matrix-org/gomatrixserverlib"
+)
+
+type Invites interface {
+	InsertInviteEvent(ctx context.Context, txn *sql.Tx, inviteEvent gomatrixserverlib.HeaderedEvent) (streamPos types.StreamPosition, err error)
+	DeleteInviteEvent(ctx context.Context, inviteEventID string) error
+	SelectInviteEventsInRange(ctx context.Context, txn *sql.Tx, targetUserID string, startPos, endPos types.StreamPosition) (map[string]gomatrixserverlib.HeaderedEvent, error)
+	SelectMaxInviteID(ctx context.Context, txn *sql.Tx) (id int64, err error)
+}