Revert "simplification of Fetchers (#1344)" (#1491)

This reverts commit 0b724bd4d5.

storage/lnetstore.go

@@ -1,46 +0,0 @@
-// Copyright 2016 The go-ethereum Authors
-// This file is part of the go-ethereum library.
-//
-// The go-ethereum library is free software: you can redistribute it and/or modify
-// it under the terms of the GNU Lesser General Public License as published by
-// the Free Software Foundation, either version 3 of the License, or
-// (at your option) any later version.
-//
-// The go-ethereum library is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU Lesser General Public License for more details.
-//
-// You should have received a copy of the GNU Lesser General Public License
-// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
-
-package storage
-
-import (
-	"context"
-
-	"github.com/ethersphere/swarm/chunk"
-	"github.com/ethersphere/swarm/network/timeouts"
-)
-
-// LNetStore is a wrapper of NetStore, which implements the chunk.Store interface. It is used only by the FileStore,
-// the component used by the Swarm API to store and retrieve content and to split and join chunks.
-type LNetStore struct {
-	*NetStore
-}
-
-// NewLNetStore is a constructor for LNetStore
-func NewLNetStore(store *NetStore) *LNetStore {
-	return &LNetStore{
-		NetStore: store,
-	}
-}
-
-// Get converts a chunk reference to a chunk Request (with empty Origin), handled by the NetStore, and
-// returns the requested chunk, or error.
-func (n *LNetStore) Get(ctx context.Context, mode chunk.ModeGet, ref Address) (ch Chunk, err error) {
-	ctx, cancel := context.WithTimeout(ctx, timeouts.FetcherGlobalTimeout)
-	defer cancel()
-
-	return n.NetStore.Get(ctx, mode, NewRequest(ref))
-}