b4a2681120
This PR reimplements the light client server pool. It is also a first step to move certain logic into a new lespay package. This package will contain the implementation of the lespay token sale functions, the token buying and selling logic and other components related to peer selection/prioritization and service quality evaluation. Over the long term this package will be reusable for incentivizing future protocols. Since the LES peer logic is now based on enode.Iterator, it can now use DNS-based fallback discovery to find servers. This document describes the function of the new components: https://gist.github.com/zsfelfoldi/3c7ace895234b7b345ab4f71dab102d4
114 lines
2.7 KiB
Go
114 lines
2.7 KiB
Go
// Copyright 2020 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package client
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import (
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"math/rand"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/common/mclock"
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"github.com/ethereum/go-ethereum/p2p/enode"
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"github.com/ethereum/go-ethereum/p2p/enr"
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"github.com/ethereum/go-ethereum/p2p/nodestate"
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)
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type testIter struct {
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waitCh chan struct{}
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nodeCh chan *enode.Node
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node *enode.Node
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}
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func (i *testIter) Next() bool {
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i.waitCh <- struct{}{}
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i.node = <-i.nodeCh
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return i.node != nil
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}
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func (i *testIter) Node() *enode.Node {
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return i.node
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}
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func (i *testIter) Close() {}
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func (i *testIter) push() {
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var id enode.ID
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rand.Read(id[:])
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i.nodeCh <- enode.SignNull(new(enr.Record), id)
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}
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func (i *testIter) waiting(timeout time.Duration) bool {
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select {
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case <-i.waitCh:
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return true
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case <-time.After(timeout):
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return false
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}
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}
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func TestFillSet(t *testing.T) {
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ns := nodestate.NewNodeStateMachine(nil, nil, &mclock.Simulated{}, testSetup)
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iter := &testIter{
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waitCh: make(chan struct{}),
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nodeCh: make(chan *enode.Node),
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}
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fs := NewFillSet(ns, iter, sfTest1)
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ns.Start()
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expWaiting := func(i int, push bool) {
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for ; i > 0; i-- {
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if !iter.waiting(time.Second * 10) {
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t.Fatalf("FillSet not waiting for new nodes")
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}
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if push {
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iter.push()
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}
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}
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}
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expNotWaiting := func() {
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if iter.waiting(time.Millisecond * 100) {
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t.Fatalf("FillSet unexpectedly waiting for new nodes")
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}
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}
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expNotWaiting()
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fs.SetTarget(3)
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expWaiting(3, true)
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expNotWaiting()
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fs.SetTarget(100)
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expWaiting(2, true)
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expWaiting(1, false)
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// lower the target before the previous one has been filled up
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fs.SetTarget(0)
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iter.push()
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expNotWaiting()
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fs.SetTarget(10)
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expWaiting(4, true)
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expNotWaiting()
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// remove all previosly set flags
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ns.ForEach(sfTest1, nodestate.Flags{}, func(node *enode.Node, state nodestate.Flags) {
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ns.SetState(node, nodestate.Flags{}, sfTest1, 0)
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})
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// now expect FillSet to fill the set up again with 10 new nodes
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expWaiting(10, true)
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expNotWaiting()
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fs.Close()
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ns.Stop()
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}
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