88 lines
2.2 KiB
Go
88 lines
2.2 KiB
Go
|
// Copyright 2019 The go-ethereum Authors
|
||
|
|
// This file is part of go-ethereum.
|
||
|
|
//
|
||
|
|
// go-ethereum is free software: you can redistribute it and/or modify
|
||
|
|
// it under the terms of the GNU General Public License as published by
|
||
|
|
// the Free Software Foundation, either version 3 of the License, or
|
||
|
|
// (at your option) any later version.
|
||
|
|
//
|
||
|
|
// go-ethereum 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 General Public License for more details.
|
||
|
|
//
|
||
|
|
// You should have received a copy of the GNU General Public License
|
||
|
|
// along with go-ethereum. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
|
||
|
|
package main
|
||
|
|
|
||
|
|
import (
|
||
|
|
"bytes"
|
||
|
|
"encoding/json"
|
||
|
|
"fmt"
|
||
|
|
"io/ioutil"
|
||
|
|
"sort"
|
||
|
|
|
||
|
|
"github.com/ethereum/go-ethereum/common"
|
||
|
|
"github.com/ethereum/go-ethereum/p2p/enode"
|
||
|
|
)
|
||
|
|
|
||
|
|
const jsonIndent = " "
|
||
|
|
|
||
|
|
// nodeSet is the nodes.json file format. It holds a set of node records
|
||
|
|
// as a JSON object.
|
||
|
|
type nodeSet map[enode.ID]nodeJSON
|
||
|
|
|
||
|
|
type nodeJSON struct {
|
||
|
|
Seq uint64 `json:"seq"`
|
||
|
|
N *enode.Node `json:"record"`
|
||
|
|
}
|
||
|
|
|
||
|
|
func loadNodesJSON(file string) nodeSet {
|
||
|
|
var nodes nodeSet
|
||
|
|
if err := common.LoadJSON(file, &nodes); err != nil {
|
||
|
|
exit(err)
|
||
|
|
}
|
||
|
|
return nodes
|
||
|
|
}
|
||
|
|
|
||
|
|
func writeNodesJSON(file string, nodes nodeSet) {
|
||
|
|
nodesJSON, err := json.MarshalIndent(nodes, "", jsonIndent)
|
||
|
|
if err != nil {
|
||
|
|
exit(err)
|
||
|
|
}
|
||
|
|
if err := ioutil.WriteFile(file, nodesJSON, 0644); err != nil {
|
||
|
|
exit(err)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (ns nodeSet) nodes() []*enode.Node {
|
||
|
|
result := make([]*enode.Node, 0, len(ns))
|
||
|
|
for _, n := range ns {
|
||
|
|
result = append(result, n.N)
|
||
|
|
}
|
||
|
|
// Sort by ID.
|
||
|
|
sort.Slice(result, func(i, j int) bool {
|
||
|
|
return bytes.Compare(result[i].ID().Bytes(), result[j].ID().Bytes()) < 0
|
||
|
|
})
|
||
|
|
return result
|
||
|
|
}
|
||
|
|
|
||
|
|
func (ns nodeSet) add(nodes ...*enode.Node) {
|
||
|
|
for _, n := range nodes {
|
||
|
|
ns[n.ID()] = nodeJSON{Seq: n.Seq(), N: n}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func (ns nodeSet) verify() error {
|
||
|
|
for id, n := range ns {
|
||
|
|
if n.N.ID() != id {
|
||
|
|
return fmt.Errorf("invalid node %v: ID does not match ID %v in record", id, n.N.ID())
|
||
|
|
}
|
||
|
|
if n.N.Seq() != n.Seq {
|
||
|
|
return fmt.Errorf("invalid node %v: 'seq' does not match seq %d from record", id, n.N.Seq())
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return nil
|
||
|
|
}
|