mirror of https://github.com/status-im/op-geth.git
144 lines
4.2 KiB
Go
144 lines
4.2 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 simulation_test
|
|
|
|
import (
|
|
"context"
|
|
"fmt"
|
|
"sync"
|
|
"time"
|
|
|
|
"github.com/ethereum/go-ethereum/log"
|
|
"github.com/ethereum/go-ethereum/node"
|
|
"github.com/ethereum/go-ethereum/p2p/simulations/adapters"
|
|
"github.com/ethereum/go-ethereum/swarm/network"
|
|
"github.com/ethereum/go-ethereum/swarm/network/simulation"
|
|
)
|
|
|
|
// Every node can have a Kademlia associated using the node bucket under
|
|
// BucketKeyKademlia key. This allows to use WaitTillHealthy to block until
|
|
// all nodes have the their Kadmlias healthy.
|
|
func ExampleSimulation_WaitTillHealthy() {
|
|
|
|
log.Error("temporarily disabled as simulations.WaitTillHealthy cannot be trusted")
|
|
return
|
|
|
|
sim := simulation.New(map[string]simulation.ServiceFunc{
|
|
"bzz": func(ctx *adapters.ServiceContext, b *sync.Map) (node.Service, func(), error) {
|
|
addr := network.NewAddr(ctx.Config.Node())
|
|
hp := network.NewHiveParams()
|
|
hp.Discovery = false
|
|
config := &network.BzzConfig{
|
|
OverlayAddr: addr.Over(),
|
|
UnderlayAddr: addr.Under(),
|
|
HiveParams: hp,
|
|
}
|
|
kad := network.NewKademlia(addr.Over(), network.NewKadParams())
|
|
// store kademlia in node's bucket under BucketKeyKademlia
|
|
// so that it can be found by WaitTillHealthy method.
|
|
b.Store(simulation.BucketKeyKademlia, kad)
|
|
return network.NewBzz(config, kad, nil, nil, nil), nil, nil
|
|
},
|
|
})
|
|
defer sim.Close()
|
|
|
|
_, err := sim.AddNodesAndConnectRing(10)
|
|
if err != nil {
|
|
// handle error properly...
|
|
panic(err)
|
|
}
|
|
|
|
ctx, cancel := context.WithTimeout(context.Background(), 60*time.Second)
|
|
defer cancel()
|
|
ill, err := sim.WaitTillHealthy(ctx, 2)
|
|
if err != nil {
|
|
// inspect the latest detected not healthy kademlias
|
|
for id, kad := range ill {
|
|
fmt.Println("Node", id)
|
|
fmt.Println(kad.String())
|
|
}
|
|
// handle error...
|
|
}
|
|
|
|
// continue with the test
|
|
}
|
|
|
|
// Watch all peer events in the simulation network, buy receiving from a channel.
|
|
func ExampleSimulation_PeerEvents() {
|
|
sim := simulation.New(nil)
|
|
defer sim.Close()
|
|
|
|
events := sim.PeerEvents(context.Background(), sim.NodeIDs())
|
|
|
|
go func() {
|
|
for e := range events {
|
|
if e.Error != nil {
|
|
log.Error("peer event", "err", e.Error)
|
|
continue
|
|
}
|
|
log.Info("peer event", "node", e.NodeID, "peer", e.PeerID, "type", e.Event.Type)
|
|
}
|
|
}()
|
|
}
|
|
|
|
// Detect when a nodes drop a peer.
|
|
func ExampleSimulation_PeerEvents_disconnections() {
|
|
sim := simulation.New(nil)
|
|
defer sim.Close()
|
|
|
|
disconnections := sim.PeerEvents(
|
|
context.Background(),
|
|
sim.NodeIDs(),
|
|
simulation.NewPeerEventsFilter().Drop(),
|
|
)
|
|
|
|
go func() {
|
|
for d := range disconnections {
|
|
if d.Error != nil {
|
|
log.Error("peer drop", "err", d.Error)
|
|
continue
|
|
}
|
|
log.Warn("peer drop", "node", d.NodeID, "peer", d.PeerID)
|
|
}
|
|
}()
|
|
}
|
|
|
|
// Watch multiple types of events or messages. In this case, they differ only
|
|
// by MsgCode, but filters can be set for different types or protocols, too.
|
|
func ExampleSimulation_PeerEvents_multipleFilters() {
|
|
sim := simulation.New(nil)
|
|
defer sim.Close()
|
|
|
|
msgs := sim.PeerEvents(
|
|
context.Background(),
|
|
sim.NodeIDs(),
|
|
// Watch when bzz messages 1 and 4 are received.
|
|
simulation.NewPeerEventsFilter().ReceivedMessages().Protocol("bzz").MsgCode(1),
|
|
simulation.NewPeerEventsFilter().ReceivedMessages().Protocol("bzz").MsgCode(4),
|
|
)
|
|
|
|
go func() {
|
|
for m := range msgs {
|
|
if m.Error != nil {
|
|
log.Error("bzz message", "err", m.Error)
|
|
continue
|
|
}
|
|
log.Info("bzz message", "node", m.NodeID, "peer", m.PeerID)
|
|
}
|
|
}()
|
|
}
|