228 lines
7.5 KiB
Go
228 lines
7.5 KiB
Go
// Copyright 2018 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 ethash
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import (
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"encoding/json"
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"io/ioutil"
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"math/big"
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"net"
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"net/http"
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"testing"
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"time"
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"github.com/ethereum/go-ethereum/common"
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"github.com/ethereum/go-ethereum/core/types"
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)
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// Tests whether remote HTTP servers are correctly notified of new work.
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func TestRemoteNotify(t *testing.T) {
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// Start a simple webserver to capture notifications
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sink := make(chan [3]string)
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server := &http.Server{
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Handler: http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
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blob, err := ioutil.ReadAll(req.Body)
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if err != nil {
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t.Fatalf("failed to read miner notification: %v", err)
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}
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var work [3]string
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if err := json.Unmarshal(blob, &work); err != nil {
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t.Fatalf("failed to unmarshal miner notification: %v", err)
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}
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sink <- work
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}),
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}
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// Open a custom listener to extract its local address
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listener, err := net.Listen("tcp", "localhost:0")
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if err != nil {
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t.Fatalf("failed to open notification server: %v", err)
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}
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defer listener.Close()
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go server.Serve(listener)
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// Wait for server to start listening
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var tries int
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for tries = 0; tries < 10; tries++ {
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conn, _ := net.DialTimeout("tcp", listener.Addr().String(), 1*time.Second)
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if conn != nil {
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break
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}
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}
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if tries == 10 {
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t.Fatal("tcp listener not ready for more than 10 seconds")
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}
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// Create the custom ethash engine
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ethash := NewTester([]string{"http://" + listener.Addr().String()}, false)
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defer ethash.Close()
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// Stream a work task and ensure the notification bubbles out
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header := &types.Header{Number: big.NewInt(1), Difficulty: big.NewInt(100)}
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block := types.NewBlockWithHeader(header)
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ethash.Seal(nil, block, nil, nil)
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select {
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case work := <-sink:
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if want := ethash.SealHash(header).Hex(); work[0] != want {
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t.Errorf("work packet hash mismatch: have %s, want %s", work[0], want)
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}
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if want := common.BytesToHash(SeedHash(header.Number.Uint64())).Hex(); work[1] != want {
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t.Errorf("work packet seed mismatch: have %s, want %s", work[1], want)
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}
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target := new(big.Int).Div(new(big.Int).Lsh(big.NewInt(1), 256), header.Difficulty)
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if want := common.BytesToHash(target.Bytes()).Hex(); work[2] != want {
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t.Errorf("work packet target mismatch: have %s, want %s", work[2], want)
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}
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case <-time.After(3 * time.Second):
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t.Fatalf("notification timed out")
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}
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}
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// Tests that pushing work packages fast to the miner doesn't cause any data race
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// issues in the notifications.
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func TestRemoteMultiNotify(t *testing.T) {
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// Start a simple webserver to capture notifications
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sink := make(chan [3]string, 64)
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server := &http.Server{
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Handler: http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
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blob, err := ioutil.ReadAll(req.Body)
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if err != nil {
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t.Fatalf("failed to read miner notification: %v", err)
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}
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var work [3]string
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if err := json.Unmarshal(blob, &work); err != nil {
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t.Fatalf("failed to unmarshal miner notification: %v", err)
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}
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sink <- work
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}),
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}
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// Open a custom listener to extract its local address
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listener, err := net.Listen("tcp", "localhost:0")
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if err != nil {
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t.Fatalf("failed to open notification server: %v", err)
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}
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defer listener.Close()
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go server.Serve(listener)
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// Create the custom ethash engine
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ethash := NewTester([]string{"http://" + listener.Addr().String()}, false)
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defer ethash.Close()
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// Stream a lot of work task and ensure all the notifications bubble out
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for i := 0; i < cap(sink); i++ {
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header := &types.Header{Number: big.NewInt(int64(i)), Difficulty: big.NewInt(100)}
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block := types.NewBlockWithHeader(header)
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ethash.Seal(nil, block, nil, nil)
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}
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for i := 0; i < cap(sink); i++ {
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select {
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case <-sink:
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case <-time.After(3 * time.Second):
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t.Fatalf("notification %d timed out", i)
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}
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}
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}
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// Tests whether stale solutions are correctly processed.
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func TestStaleSubmission(t *testing.T) {
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ethash := NewTester(nil, true)
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defer ethash.Close()
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api := &API{ethash}
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fakeNonce, fakeDigest := types.BlockNonce{0x01, 0x02, 0x03}, common.HexToHash("deadbeef")
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testcases := []struct {
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headers []*types.Header
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submitIndex int
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submitRes bool
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}{
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// Case1: submit solution for the latest mining package
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{
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[]*types.Header{
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{ParentHash: common.BytesToHash([]byte{0xa}), Number: big.NewInt(1), Difficulty: big.NewInt(100000000)},
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},
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0,
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true,
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},
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// Case2: submit solution for the previous package but have same parent.
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{
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[]*types.Header{
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{ParentHash: common.BytesToHash([]byte{0xb}), Number: big.NewInt(2), Difficulty: big.NewInt(100000000)},
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{ParentHash: common.BytesToHash([]byte{0xb}), Number: big.NewInt(2), Difficulty: big.NewInt(100000001)},
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},
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0,
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true,
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},
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// Case3: submit stale but acceptable solution
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{
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[]*types.Header{
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{ParentHash: common.BytesToHash([]byte{0xc}), Number: big.NewInt(3), Difficulty: big.NewInt(100000000)},
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{ParentHash: common.BytesToHash([]byte{0xd}), Number: big.NewInt(9), Difficulty: big.NewInt(100000000)},
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},
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0,
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true,
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},
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// Case4: submit very old solution
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{
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[]*types.Header{
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{ParentHash: common.BytesToHash([]byte{0xe}), Number: big.NewInt(10), Difficulty: big.NewInt(100000000)},
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{ParentHash: common.BytesToHash([]byte{0xf}), Number: big.NewInt(17), Difficulty: big.NewInt(100000000)},
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},
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0,
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false,
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},
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}
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results := make(chan *types.Block, 16)
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for id, c := range testcases {
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for _, h := range c.headers {
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ethash.Seal(nil, types.NewBlockWithHeader(h), results, nil)
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}
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if res := api.SubmitWork(fakeNonce, ethash.SealHash(c.headers[c.submitIndex]), fakeDigest); res != c.submitRes {
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t.Errorf("case %d submit result mismatch, want %t, get %t", id+1, c.submitRes, res)
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}
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if !c.submitRes {
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continue
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}
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select {
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case res := <-results:
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if res.Header().Nonce != fakeNonce {
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t.Errorf("case %d block nonce mismatch, want %s, get %s", id+1, fakeNonce, res.Header().Nonce)
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}
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if res.Header().MixDigest != fakeDigest {
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t.Errorf("case %d block digest mismatch, want %s, get %s", id+1, fakeDigest, res.Header().MixDigest)
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}
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if res.Header().Difficulty.Uint64() != c.headers[c.submitIndex].Difficulty.Uint64() {
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t.Errorf("case %d block difficulty mismatch, want %d, get %d", id+1, c.headers[c.submitIndex].Difficulty, res.Header().Difficulty)
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}
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if res.Header().Number.Uint64() != c.headers[c.submitIndex].Number.Uint64() {
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t.Errorf("case %d block number mismatch, want %d, get %d", id+1, c.headers[c.submitIndex].Number.Uint64(), res.Header().Number.Uint64())
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}
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if res.Header().ParentHash != c.headers[c.submitIndex].ParentHash {
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t.Errorf("case %d block parent hash mismatch, want %s, get %s", id+1, c.headers[c.submitIndex].ParentHash.Hex(), res.Header().ParentHash.Hex())
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}
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case <-time.NewTimer(time.Second).C:
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t.Errorf("case %d fetch ethash result timeout", id+1)
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}
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}
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}
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