Official Go implementation of the Ethereum protocol
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go-ethereum/les/vflux/server/balance_test.go

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// Copyright 2019 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 server
import (
"math"
"math/rand"
"reflect"
"testing"
"time"
"github.com/ethereum/go-ethereum/common/mclock"
"github.com/ethereum/go-ethereum/ethdb"
"github.com/ethereum/go-ethereum/ethdb/memorydb"
"github.com/ethereum/go-ethereum/les/utils"
"github.com/ethereum/go-ethereum/p2p/enode"
"github.com/ethereum/go-ethereum/p2p/enr"
"github.com/ethereum/go-ethereum/p2p/nodestate"
)
type zeroExpirer struct{}
func (z zeroExpirer) SetRate(now mclock.AbsTime, rate float64) {}
func (z zeroExpirer) SetLogOffset(now mclock.AbsTime, logOffset utils.Fixed64) {}
func (z zeroExpirer) LogOffset(now mclock.AbsTime) utils.Fixed64 { return 0 }
type balanceTestClient struct{}
func (client balanceTestClient) FreeClientId() string { return "" }
type balanceTestSetup struct {
clock *mclock.Simulated
db ethdb.KeyValueStore
ns *nodestate.NodeStateMachine
setup *serverSetup
bt *balanceTracker
}
func newBalanceTestSetup(db ethdb.KeyValueStore, posExp, negExp utils.ValueExpirer) *balanceTestSetup {
// Initialize and customize the setup for the balance testing
clock := &mclock.Simulated{}
setup := newServerSetup()
setup.clientField = setup.setup.NewField("balancTestClient", reflect.TypeOf(balanceTestClient{}))
ns := nodestate.NewNodeStateMachine(nil, nil, clock, setup.setup)
if posExp == nil {
posExp = zeroExpirer{}
}
if negExp == nil {
negExp = zeroExpirer{}
}
if db == nil {
db = memorydb.New()
}
bt := newBalanceTracker(ns, setup, db, clock, posExp, negExp)
ns.Start()
return &balanceTestSetup{
clock: clock,
db: db,
ns: ns,
setup: setup,
bt: bt,
}
}
func (b *balanceTestSetup) newNode(capacity uint64) *nodeBalance {
node := enode.SignNull(&enr.Record{}, enode.ID{})
b.ns.SetField(node, b.setup.clientField, balanceTestClient{})
if capacity != 0 {
b.ns.SetField(node, b.setup.capacityField, capacity)
}
n, _ := b.ns.GetField(node, b.setup.balanceField).(*nodeBalance)
return n
}
func (b *balanceTestSetup) setBalance(node *nodeBalance, pos, neg uint64) (err error) {
b.bt.BalanceOperation(node.node.ID(), node.connAddress, func(balance AtomicBalanceOperator) {
err = balance.SetBalance(pos, neg)
})
return
}
func (b *balanceTestSetup) addBalance(node *nodeBalance, add int64) (old, new uint64, err error) {
b.bt.BalanceOperation(node.node.ID(), node.connAddress, func(balance AtomicBalanceOperator) {
old, new, err = balance.AddBalance(add)
})
return
}
func (b *balanceTestSetup) stop() {
b.bt.stop()
b.ns.Stop()
}
func TestAddBalance(t *testing.T) {
b := newBalanceTestSetup(nil, nil, nil)
defer b.stop()
node := b.newNode(1000)
var inputs = []struct {
delta int64
expect [2]uint64
total uint64
expectErr bool
}{
{100, [2]uint64{0, 100}, 100, false},
{-100, [2]uint64{100, 0}, 0, false},
{-100, [2]uint64{0, 0}, 0, false},
{1, [2]uint64{0, 1}, 1, false},
{maxBalance, [2]uint64{0, 0}, 0, true},
}
for _, i := range inputs {
old, new, err := b.addBalance(node, i.delta)
if i.expectErr {
if err == nil {
t.Fatalf("Expect get error but nil")
}
continue
} else if err != nil {
t.Fatalf("Expect get no error but %v", err)
}
if old != i.expect[0] || new != i.expect[1] {
t.Fatalf("Positive balance mismatch, got %v -> %v", old, new)
}
if b.bt.TotalTokenAmount() != i.total {
t.Fatalf("Total positive balance mismatch, want %v, got %v", i.total, b.bt.TotalTokenAmount())
}
}
}
func TestSetBalance(t *testing.T) {
b := newBalanceTestSetup(nil, nil, nil)
defer b.stop()
node := b.newNode(1000)
var inputs = []struct {
pos, neg uint64
}{
{1000, 0},
{0, 1000},
{1000, 1000},
}
for _, i := range inputs {
b.setBalance(node, i.pos, i.neg)
pos, neg := node.GetBalance()
if pos != i.pos {
t.Fatalf("Positive balance mismatch, want %v, got %v", i.pos, pos)
}
if neg != i.neg {
t.Fatalf("Negative balance mismatch, want %v, got %v", i.neg, neg)
}
}
}
func TestBalanceTimeCost(t *testing.T) {
b := newBalanceTestSetup(nil, nil, nil)
defer b.stop()
node := b.newNode(1000)
node.SetPriceFactors(PriceFactors{1, 0, 1}, PriceFactors{1, 0, 1})
b.setBalance(node, uint64(time.Minute), 0) // 1 minute time allowance
var inputs = []struct {
runTime time.Duration
expPos uint64
expNeg uint64
}{
{time.Second, uint64(time.Second * 59), 0},
{0, uint64(time.Second * 59), 0},
{time.Second * 59, 0, 0},
{time.Second, 0, uint64(time.Second)},
}
for _, i := range inputs {
b.clock.Run(i.runTime)
if pos, _ := node.GetBalance(); pos != i.expPos {
t.Fatalf("Positive balance mismatch, want %v, got %v", i.expPos, pos)
}
if _, neg := node.GetBalance(); neg != i.expNeg {
t.Fatalf("Negative balance mismatch, want %v, got %v", i.expNeg, neg)
}
}
b.setBalance(node, uint64(time.Minute), 0) // Refill 1 minute time allowance
for _, i := range inputs {
b.clock.Run(i.runTime)
if pos, _ := node.GetBalance(); pos != i.expPos {
t.Fatalf("Positive balance mismatch, want %v, got %v", i.expPos, pos)
}
if _, neg := node.GetBalance(); neg != i.expNeg {
t.Fatalf("Negative balance mismatch, want %v, got %v", i.expNeg, neg)
}
}
}
func TestBalanceReqCost(t *testing.T) {
b := newBalanceTestSetup(nil, nil, nil)
defer b.stop()
node := b.newNode(1000)
node.SetPriceFactors(PriceFactors{1, 0, 1}, PriceFactors{1, 0, 1})
b.setBalance(node, uint64(time.Minute), 0) // 1 minute time serving time allowance
var inputs = []struct {
reqCost uint64
expPos uint64
expNeg uint64
}{
{uint64(time.Second), uint64(time.Second * 59), 0},
{0, uint64(time.Second * 59), 0},
{uint64(time.Second * 59), 0, 0},
{uint64(time.Second), 0, uint64(time.Second)},
}
for _, i := range inputs {
node.RequestServed(i.reqCost)
if pos, _ := node.GetBalance(); pos != i.expPos {
t.Fatalf("Positive balance mismatch, want %v, got %v", i.expPos, pos)
}
if _, neg := node.GetBalance(); neg != i.expNeg {
t.Fatalf("Negative balance mismatch, want %v, got %v", i.expNeg, neg)
}
}
}
func TestBalanceToPriority(t *testing.T) {
b := newBalanceTestSetup(nil, nil, nil)
defer b.stop()
node := b.newNode(1000)
node.SetPriceFactors(PriceFactors{1, 0, 1}, PriceFactors{1, 0, 1})
var inputs = []struct {
pos uint64
neg uint64
priority int64
}{
{1000, 0, 1},
{2000, 0, 2}, // Higher balance, higher priority value
{0, 0, 0},
{0, 1000, -1000},
}
for _, i := range inputs {
b.setBalance(node, i.pos, i.neg)
priority := node.priority(1000)
if priority != i.priority {
t.Fatalf("priority mismatch, want %v, got %v", i.priority, priority)
}
}
}
func TestEstimatedPriority(t *testing.T) {
b := newBalanceTestSetup(nil, nil, nil)
defer b.stop()
node := b.newNode(1000000000)
node.SetPriceFactors(PriceFactors{1, 0, 1}, PriceFactors{1, 0, 1})
b.setBalance(node, uint64(time.Minute), 0)
var inputs = []struct {
runTime time.Duration // time cost
futureTime time.Duration // diff of future time
reqCost uint64 // single request cost
priority int64 // expected estimated priority
}{
{time.Second, time.Second, 0, 58},
{0, time.Second, 0, 58},
// 2 seconds time cost, 1 second estimated time cost, 10^9 request cost,
// 10^9 estimated request cost per second.
{time.Second, time.Second, 1000000000, 55},
// 3 seconds time cost, 3 second estimated time cost, 10^9*2 request cost,
// 4*10^9 estimated request cost.
{time.Second, 3 * time.Second, 1000000000, 48},
// All positive balance is used up
{time.Second * 55, 0, 0, -1},
// 1 minute estimated time cost, 4/58 * 10^9 estimated request cost per sec.
{0, time.Minute, 0, -int64(time.Minute) - int64(time.Second)*120/29},
}
for _, i := range inputs {
b.clock.Run(i.runTime)
node.RequestServed(i.reqCost)
priority := node.estimatePriority(1000000000, 0, i.futureTime, 0, false)
if priority != i.priority {
t.Fatalf("Estimated priority mismatch, want %v, got %v", i.priority, priority)
}
}
}
func TestPostiveBalanceCounting(t *testing.T) {
b := newBalanceTestSetup(nil, nil, nil)
defer b.stop()
var nodes []*nodeBalance
for i := 0; i < 100; i += 1 {
node := b.newNode(1000000)
node.SetPriceFactors(PriceFactors{1, 0, 1}, PriceFactors{1, 0, 1})
nodes = append(nodes, node)
}
// Allocate service token
var sum uint64
for i := 0; i < 100; i += 1 {
amount := int64(rand.Intn(100) + 100)
b.addBalance(nodes[i], amount)
sum += uint64(amount)
}
if b.bt.TotalTokenAmount() != sum {
t.Fatalf("Invalid token amount")
}
// Change client status
for i := 0; i < 100; i += 1 {
if rand.Intn(2) == 0 {
b.ns.SetField(nodes[i].node, b.setup.capacityField, uint64(1))
}
}
if b.bt.TotalTokenAmount() != sum {
t.Fatalf("Invalid token amount")
}
for i := 0; i < 100; i += 1 {
if rand.Intn(2) == 0 {
b.ns.SetField(nodes[i].node, b.setup.capacityField, uint64(1))
}
}
if b.bt.TotalTokenAmount() != sum {
t.Fatalf("Invalid token amount")
}
}
func TestCallbackChecking(t *testing.T) {
b := newBalanceTestSetup(nil, nil, nil)
defer b.stop()
node := b.newNode(1000000)
node.SetPriceFactors(PriceFactors{1, 0, 1}, PriceFactors{1, 0, 1})
var inputs = []struct {
priority int64
expDiff time.Duration
}{
{500, time.Millisecond * 500},
{0, time.Second},
{-int64(time.Second), 2 * time.Second},
}
b.setBalance(node, uint64(time.Second), 0)
for _, i := range inputs {
diff, _ := node.timeUntil(i.priority)
if diff != i.expDiff {
t.Fatalf("Time difference mismatch, want %v, got %v", i.expDiff, diff)
}
}
}
func TestCallback(t *testing.T) {
b := newBalanceTestSetup(nil, nil, nil)
defer b.stop()
node := b.newNode(1000)
node.SetPriceFactors(PriceFactors{1, 0, 1}, PriceFactors{1, 0, 1})
callCh := make(chan struct{}, 1)
b.setBalance(node, uint64(time.Minute), 0)
node.addCallback(balanceCallbackZero, 0, func() { callCh <- struct{}{} })
b.clock.Run(time.Minute)
select {
case <-callCh:
case <-time.NewTimer(time.Second).C:
t.Fatalf("Callback hasn't been called yet")
}
b.setBalance(node, uint64(time.Minute), 0)
node.addCallback(balanceCallbackZero, 0, func() { callCh <- struct{}{} })
node.removeCallback(balanceCallbackZero)
b.clock.Run(time.Minute)
select {
case <-callCh:
t.Fatalf("Callback shouldn't be called")
case <-time.NewTimer(time.Millisecond * 100).C:
}
}
func TestBalancePersistence(t *testing.T) {
posExp := &utils.Expirer{}
negExp := &utils.Expirer{}
posExp.SetRate(0, math.Log(2)/float64(time.Hour*2)) // halves every two hours
negExp.SetRate(0, math.Log(2)/float64(time.Hour)) // halves every hour
setup := newBalanceTestSetup(nil, posExp, negExp)
exp := func(balance *nodeBalance, expPos, expNeg uint64) {
pos, neg := balance.GetBalance()
if pos != expPos {
t.Fatalf("Positive balance incorrect, want %v, got %v", expPos, pos)
}
if neg != expNeg {
t.Fatalf("Positive balance incorrect, want %v, got %v", expPos, pos)
}
}
expTotal := func(expTotal uint64) {
total := setup.bt.TotalTokenAmount()
if total != expTotal {
t.Fatalf("Total token amount incorrect, want %v, got %v", expTotal, total)
}
}
expTotal(0)
balance := setup.newNode(0)
expTotal(0)
setup.setBalance(balance, 16000000000, 16000000000)
exp(balance, 16000000000, 16000000000)
expTotal(16000000000)
setup.clock.Run(time.Hour * 2)
exp(balance, 8000000000, 4000000000)
expTotal(8000000000)
setup.stop()
// Test the functionalities after restart
setup = newBalanceTestSetup(setup.db, posExp, negExp)
expTotal(8000000000)
balance = setup.newNode(0)
exp(balance, 8000000000, 4000000000)
expTotal(8000000000)
setup.clock.Run(time.Hour * 2)
exp(balance, 4000000000, 1000000000)
expTotal(4000000000)
setup.stop()
}