14cc967d19
This change includes a leftovers from https://github.com/ethereum/go-ethereum/pull/29307 - using the [new `slices` package](https://go.dev/doc/go1.21#slices) and - using the [new `cmp.Ordered`](https://go.dev/doc/go1.21#cmp) instead of exp `constraints.Ordered`
134 lines
3.4 KiB
Go
134 lines
3.4 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"
|
|
"os"
|
|
"slices"
|
|
"time"
|
|
|
|
"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"`
|
|
|
|
// The score tracks how many liveness checks were performed. It is incremented by one
|
|
// every time the node passes a check, and halved every time it doesn't.
|
|
Score int `json:"score,omitempty"`
|
|
// These two track the time of last successful contact.
|
|
FirstResponse time.Time `json:"firstResponse,omitempty"`
|
|
LastResponse time.Time `json:"lastResponse,omitempty"`
|
|
// This one tracks the time of our last attempt to contact the node.
|
|
LastCheck time.Time `json:"lastCheck,omitempty"`
|
|
}
|
|
|
|
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 file == "-" {
|
|
os.Stdout.Write(nodesJSON)
|
|
return
|
|
}
|
|
if err := os.WriteFile(file, nodesJSON, 0644); err != nil {
|
|
exit(err)
|
|
}
|
|
}
|
|
|
|
// nodes returns the node records contained in the set.
|
|
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.
|
|
slices.SortFunc(result, func(a, b *enode.Node) int {
|
|
return bytes.Compare(a.ID().Bytes(), b.ID().Bytes())
|
|
})
|
|
return result
|
|
}
|
|
|
|
// add ensures the given nodes are present in the set.
|
|
func (ns nodeSet) add(nodes ...*enode.Node) {
|
|
for _, n := range nodes {
|
|
v := ns[n.ID()]
|
|
v.N = n
|
|
v.Seq = n.Seq()
|
|
ns[n.ID()] = v
|
|
}
|
|
}
|
|
|
|
// topN returns the top n nodes by score as a new set.
|
|
func (ns nodeSet) topN(n int) nodeSet {
|
|
if n >= len(ns) {
|
|
return ns
|
|
}
|
|
|
|
byscore := make([]nodeJSON, 0, len(ns))
|
|
for _, v := range ns {
|
|
byscore = append(byscore, v)
|
|
}
|
|
slices.SortFunc(byscore, func(a, b nodeJSON) int {
|
|
if a.Score > b.Score {
|
|
return -1
|
|
}
|
|
if a.Score < b.Score {
|
|
return 1
|
|
}
|
|
return 0
|
|
})
|
|
result := make(nodeSet, n)
|
|
for _, v := range byscore[:n] {
|
|
result[v.N.ID()] = v
|
|
}
|
|
return result
|
|
}
|
|
|
|
// verify performs integrity checks on the node set.
|
|
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
|
|
}
|