/
txs_fetcher.go
249 lines (216 loc) · 6.46 KB
/
txs_fetcher.go
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// Copyright 2022 The AmazeChain Authors
// This file is part of the AmazeChain library.
//
// The AmazeChain 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 AmazeChain 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 AmazeChain library. If not, see <http://www.gnu.org/licenses/>.
package txspool
import (
"context"
"fmt"
"google.golang.org/protobuf/proto"
"math/rand"
"time"
"github.com/amazechain/amc/api/protocol/sync_proto"
"github.com/amazechain/amc/api/protocol/types_pb"
"github.com/amazechain/amc/common"
"github.com/amazechain/amc/common/message"
"github.com/amazechain/amc/common/transaction"
"github.com/amazechain/amc/common/types"
"github.com/amazechain/amc/log"
"github.com/libp2p/go-libp2p/core/peer"
"go.uber.org/zap"
)
const (
BloomFetcherMaxTime = 10 * time.Minute
BloomSendTransactionTime = 10 * time.Second
BloomSendMaxTransactions = 100
)
var (
ErrBadPeer = fmt.Errorf("bad peer error")
)
// txsRequest
type txsRequest struct {
hashes hashes //
bloom *types.Bloom //
peer peer.ID //
}
type hashes []types.Hash
func (h hashes) pop() types.Hash {
old := h
n := len(old)
x := old[n-1]
h = old[0 : n-1]
return x
}
type TxsFetcher struct {
quit chan struct{}
finished bool
peers common.PeerMap
p2pServer common.INetwork
peerRequests map[peer.ID]*txsRequest // other peer requests
bloom *types.Bloom
fetched map[types.Hash]bool //
getTx func(hash types.Hash) *transaction.Transaction
addTxs func([]*transaction.Transaction) []error
pendingTxs func(enforceTips bool) map[types.Address][]*transaction.Transaction
// fetchTxs
//fetchTxs func(string, []types.Hash)
// ch
peerJoinCh chan *common.PeerJoinEvent
peerDropCh chan *common.PeerDropEvent
//
ctx context.Context
cancel context.CancelFunc
}
func NewTxsFetcher(ctx context.Context, getTx func(hash types.Hash) *transaction.Transaction, addTxs func([]*transaction.Transaction) []error, pendingTxs func(enforceTips bool) map[types.Address][]*transaction.Transaction, p2pServer common.INetwork, peers common.PeerMap, bloom *types.Bloom) *TxsFetcher {
c, cancel := context.WithCancel(ctx)
f := &TxsFetcher{
quit: make(chan struct{}),
peers: peers,
peerRequests: make(map[peer.ID]*txsRequest),
fetched: make(map[types.Hash]bool),
p2pServer: p2pServer,
addTxs: addTxs,
getTx: getTx,
pendingTxs: pendingTxs,
bloom: bloom,
peerJoinCh: make(chan *common.PeerJoinEvent, 10),
peerDropCh: make(chan *common.PeerDropEvent, 10),
finished: false,
ctx: c,
cancel: cancel,
}
return f
}
func (f TxsFetcher) Start() error {
go f.sendBloomTransactionLoop()
go f.bloomBroadcastLoop()
return nil
}
// sendBloomTransactionLoop
func (f TxsFetcher) sendBloomTransactionLoop() {
tick := time.NewTicker(BloomSendTransactionTime)
select {
case <-tick.C:
for ID, req := range f.peerRequests {
if p, ok := f.peers[ID]; ok == true {
var txs []*types_pb.Transaction
for i := 0; i < BloomSendMaxTransactions; i++ {
hash := req.hashes.pop()
tx := f.getTx(hash)
txs = append(txs, tx.ToProtoMessage().(*types_pb.Transaction))
}
msg := &sync_proto.SyncTask{
Id: rand.Uint64(),
Ok: true,
SyncType: sync_proto.SyncType_TransactionRes,
Payload: &sync_proto.SyncTask_SyncTransactionResponse{
SyncTransactionResponse: &sync_proto.SyncTransactionResponse{
Transactions: txs,
},
},
}
data, _ := proto.Marshal(msg)
p.WriteMsg(message.MsgTransaction, data)
}
}
case <-f.ctx.Done():
return
}
}
func (f TxsFetcher) bloomBroadcastLoop() {
if f.bloom == nil {
return
}
tick := time.NewTicker(BloomFetcherMaxTime)
bloom, err := f.bloom.Marshal()
if err != nil {
log.Warn("txs fetcher bloom Marshal err", zap.Error(err))
return
}
msg := &sync_proto.SyncTask{
Id: rand.Uint64(),
Ok: true,
SyncType: sync_proto.SyncType_TransactionReq,
Payload: &sync_proto.SyncTask_SyncTransactionRequest{
SyncTransactionRequest: &sync_proto.SyncTransactionRequest{
Bloom: bloom,
},
},
}
request, _ := proto.Marshal(msg)
select {
case peerId := <-f.peerJoinCh:
f.peers[peerId.Peer].WriteMsg(message.MsgTransaction, request)
case <-tick.C:
case <-f.ctx.Done():
return
}
}
// ConnHandler handler peer message
func (f TxsFetcher) ConnHandler(data []byte, ID peer.ID) error {
_, ok := f.peers[ID]
if !ok {
return ErrBadPeer
}
syncTask := sync_proto.SyncTask{}
if err := proto.Unmarshal(data, &syncTask); err != nil {
log.Errorf("receive sync task(headersResponse) msg err: %v", err)
return err
}
//taskID := syncTask.Id
log.Debugf("receive synctask msg from :%v, task type: %v, ok:%v", ID, syncTask.SyncType, syncTask.Ok)
switch syncTask.SyncType {
case sync_proto.SyncType_TransactionReq:
request := syncTask.Payload.(*sync_proto.SyncTask_SyncTransactionRequest).SyncTransactionRequest
if _, ok := f.peerRequests[ID]; ok == false {
bloom := new(types.Bloom)
err := bloom.UnMarshalBloom(request.Bloom)
if err == nil {
var txs []*transaction.Transaction
var hashes []types.Hash
pending := f.pendingTxs(false)
for _, batch := range pending {
txs = append(txs, batch...)
}
for _, tx := range txs {
hash := tx.Hash()
if !bloom.Contain(hash.Bytes()) {
hashes = append(hashes, hash)
}
}
f.peerRequests[ID] = &txsRequest{
bloom: bloom,
hashes: hashes,
peer: ID,
}
}
}
case sync_proto.SyncType_TransactionRes:
//response := syncTask.Payload.(*sync_proto.SyncTask_SyncTransactionResponse).SyncTransactionResponse
//var txs []*transaction.Transaction
//for _, tranPb := range response.Transactions {
//if _, ok := f.fetched[utils.ConvertH256ToHash(tranPb.Hash)]; ok == false {
// f.fetched[utils.ConvertH256ToHash(tranPb.Hash)] = true
// tx, err := transaction.FromProtoMessage(tranPb)
// if err == nil {
// txs = append(txs, tx)
// }
//}
//}
//if len(txs) > 0 {
// f.addTxs(txs)
//}
}
return nil
}