mirror of https://github.com/status-im/op-geth.git
112 lines
3.7 KiB
Go
112 lines
3.7 KiB
Go
// Copyright 2018 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 mock defines types that are used by different implementations
|
|
// of mock storages.
|
|
//
|
|
// Implementations of mock storages are located in directories
|
|
// under this package:
|
|
//
|
|
// - db - LevelDB backend
|
|
// - mem - in memory map backend
|
|
// - rpc - RPC client that can connect to other backends
|
|
//
|
|
// Mock storages can implement Importer and Exporter interfaces
|
|
// for importing and exporting all chunk data that they contain.
|
|
// The exported file is a tar archive with all files named by
|
|
// hexadecimal representations of chunk keys and with content
|
|
// with JSON-encoded ExportedChunk structure. Exported format
|
|
// should be preserved across all mock store implementations.
|
|
package mock
|
|
|
|
import (
|
|
"errors"
|
|
"io"
|
|
|
|
"github.com/ethereum/go-ethereum/common"
|
|
)
|
|
|
|
// ErrNotFound indicates that the chunk is not found.
|
|
var ErrNotFound = errors.New("not found")
|
|
|
|
// NodeStore holds the node address and a reference to the GlobalStore
|
|
// in order to access and store chunk data only for one node.
|
|
type NodeStore struct {
|
|
store GlobalStorer
|
|
addr common.Address
|
|
}
|
|
|
|
// NewNodeStore creates a new instance of NodeStore that keeps
|
|
// chunk data using GlobalStorer with a provided address.
|
|
func NewNodeStore(addr common.Address, store GlobalStorer) *NodeStore {
|
|
return &NodeStore{
|
|
store: store,
|
|
addr: addr,
|
|
}
|
|
}
|
|
|
|
// Get returns chunk data for a key for a node that has the address
|
|
// provided on NodeStore initialization.
|
|
func (n *NodeStore) Get(key []byte) (data []byte, err error) {
|
|
return n.store.Get(n.addr, key)
|
|
}
|
|
|
|
// Put saves chunk data for a key for a node that has the address
|
|
// provided on NodeStore initialization.
|
|
func (n *NodeStore) Put(key []byte, data []byte) error {
|
|
return n.store.Put(n.addr, key, data)
|
|
}
|
|
|
|
// Delete removes chunk data for a key for a node that has the address
|
|
// provided on NodeStore initialization.
|
|
func (n *NodeStore) Delete(key []byte) error {
|
|
return n.store.Delete(n.addr, key)
|
|
}
|
|
|
|
// GlobalStorer defines methods for mock db store
|
|
// that stores chunk data for all swarm nodes.
|
|
// It is used in tests to construct mock NodeStores
|
|
// for swarm nodes and to track and validate chunks.
|
|
type GlobalStorer interface {
|
|
Get(addr common.Address, key []byte) (data []byte, err error)
|
|
Put(addr common.Address, key []byte, data []byte) error
|
|
Delete(addr common.Address, key []byte) error
|
|
HasKey(addr common.Address, key []byte) bool
|
|
// NewNodeStore creates an instance of NodeStore
|
|
// to be used by a single swarm node with
|
|
// address addr.
|
|
NewNodeStore(addr common.Address) *NodeStore
|
|
}
|
|
|
|
// Importer defines method for importing mock store data
|
|
// from an exported tar archive.
|
|
type Importer interface {
|
|
Import(r io.Reader) (n int, err error)
|
|
}
|
|
|
|
// Exporter defines method for exporting mock store data
|
|
// to a tar archive.
|
|
type Exporter interface {
|
|
Export(w io.Writer) (n int, err error)
|
|
}
|
|
|
|
// ExportedChunk is the structure that is saved in tar archive for
|
|
// each chunk as JSON-encoded bytes.
|
|
type ExportedChunk struct {
|
|
Data []byte `json:"d"`
|
|
Addrs []common.Address `json:"a"`
|
|
}
|