channeldb: export pagination method

diff --git a/channeldb/invoices.go b/channeldb/invoices.go
index 161fa4a..ab8d142 100644
--- a/channeldb/invoices.go
+++ b/channeldb/invoices.go
@@ -553,7 +553,7 @@ func (d *DB) QueryInvoices(_ context.Context, q invpkg.InvoiceQuery) (
 
 		// Create a paginator which reads from our add index bucket with
 		// the parameters provided by the invoice query.
-		paginator := newPaginator(
+		paginator := NewPaginator(
 			invoiceAddIndex.ReadCursor(), q.Reversed, q.IndexOffset,
 			q.NumMaxInvoices,
 		)
@@ -603,7 +603,7 @@ func (d *DB) QueryInvoices(_ context.Context, q invpkg.InvoiceQuery) (
 
 		// Query our paginator using accumulateInvoices to build up a
 		// set of invoices.
-		if err := paginator.query(accumulateInvoices); err != nil {
+		if err := paginator.Query(accumulateInvoices); err != nil {
 			return err
 		}
 
diff --git a/channeldb/paginate.go b/channeldb/paginate.go
index 496c236..dbb3548 100644
--- a/channeldb/paginate.go
+++ b/channeldb/paginate.go
@@ -16,9 +16,9 @@ type paginator struct {
 	totalItems uint64
 }
 
-// newPaginator returns a struct which can be used to query an indexed bucket
+// NewPaginator returns a struct which can be used to query an indexed bucket
 // in pages.
-func newPaginator(c kvdb.RCursor, reversed bool,
+func NewPaginator(c kvdb.RCursor, reversed bool,
 	indexOffset, totalItems uint64) paginator {
 
 	return paginator{
@@ -105,14 +105,14 @@ func (p paginator) cursorStart() ([]byte, []byte) {
 	return indexKey, indexValue
 }
 
-// query gets the start point for our index offset and iterates through keys
+// Query gets the start point for our index offset and iterates through keys
 // in our index until we reach the total number of items required for the query
 // or we run out of cursor values. This function takes a fetchAndAppend function
 // which is responsible for looking up the entry at that index, adding the entry
 // to its set of return items (if desired) and return a boolean which indicates
 // whether the item was added. This is required to allow the paginator to
 // determine when the response has the maximum number of required items.
-func (p paginator) query(fetchAndAppend func(k, v []byte) (bool, error)) error {
+func (p paginator) Query(fetchAndAppend func(k, v []byte) (bool, error)) error {
 	indexKey, indexValue := p.cursorStart()
 
 	var totalItems int
diff --git a/channeldb/payments_kv_store.go b/channeldb/payments_kv_store.go
index cf2ca91..d18616c 100644
--- a/channeldb/payments_kv_store.go
+++ b/channeldb/payments_kv_store.go
@@ -1205,13 +1205,13 @@ func (p *KVPaymentsDB) QueryPayments(_ context.Context,
 
 		// Create a paginator which reads from our sequence index bucket
 		// with the parameters provided by the payments query.
-		paginator := newPaginator(
+		paginator := NewPaginator(
 			indexes.ReadCursor(), query.Reversed, query.IndexOffset,
 			query.MaxPayments,
 		)
 
 		// Run a paginated query, adding payments to our response.
-		if err := paginator.query(accumulatePayments); err != nil {
+		if err := paginator.Query(accumulatePayments); err != nil {
 			return err
 		}