1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
// Copyright 2016 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 les
import (
"sync"
"github.com/ethereum/go-ethereum/common"
"github.com/ethereum/go-ethereum/core/types"
)
type ltrInfo struct {
tx *types.Transaction
sentTo map[*peer]struct{}
}
type LesTxRelay struct {
txSent map[common.Hash]*ltrInfo
txPending map[common.Hash]struct{}
ps *peerSet
peerList []*peer
peerStartPos int
lock sync.RWMutex
}
func NewLesTxRelay() *LesTxRelay {
return &LesTxRelay{
txSent: make(map[common.Hash]*ltrInfo),
txPending: make(map[common.Hash]struct{}),
ps: newPeerSet(),
}
}
func (self *LesTxRelay) addPeer(p *peer) {
self.lock.Lock()
defer self.lock.Unlock()
self.ps.Register(p)
self.peerList = self.ps.AllPeers()
}
func (self *LesTxRelay) removePeer(id string) {
self.lock.Lock()
defer self.lock.Unlock()
self.ps.Unregister(id)
self.peerList = self.ps.AllPeers()
}
// send sends a list of transactions to at most a given number of peers at
// once, never resending any particular transaction to the same peer twice
func (self *LesTxRelay) send(txs types.Transactions, count int) {
sendTo := make(map[*peer]types.Transactions)
self.peerStartPos++ // rotate the starting position of the peer list
if self.peerStartPos >= len(self.peerList) {
self.peerStartPos = 0
}
for _, tx := range txs {
hash := tx.Hash()
ltr, ok := self.txSent[hash]
if !ok {
ltr = <rInfo{
tx: tx,
sentTo: make(map[*peer]struct{}),
}
self.txSent[hash] = ltr
self.txPending[hash] = struct{}{}
}
if len(self.peerList) > 0 {
cnt := count
pos := self.peerStartPos
for {
peer := self.peerList[pos]
if _, ok := ltr.sentTo[peer]; !ok {
sendTo[peer] = append(sendTo[peer], tx)
ltr.sentTo[peer] = struct{}{}
cnt--
}
if cnt == 0 {
break // sent it to the desired number of peers
}
pos++
if pos == len(self.peerList) {
pos = 0
}
if pos == self.peerStartPos {
break // tried all available peers
}
}
}
}
for p, list := range sendTo {
cost := p.GetRequestCost(SendTxMsg, len(list))
go func(p *peer, list types.Transactions, cost uint64) {
p.fcServer.SendRequest(0, cost)
p.SendTxs(cost, list)
}(p, list, cost)
}
}
func (self *LesTxRelay) Send(txs types.Transactions) {
self.lock.Lock()
defer self.lock.Unlock()
self.send(txs, 3)
}
func (self *LesTxRelay) NewHead(head common.Hash, mined []common.Hash, rollback []common.Hash) {
self.lock.Lock()
defer self.lock.Unlock()
for _, hash := range mined {
delete(self.txPending, hash)
}
for _, hash := range rollback {
self.txPending[hash] = struct{}{}
}
if len(self.txPending) > 0 {
txs := make(types.Transactions, len(self.txPending))
i := 0
for hash, _ := range self.txPending {
txs[i] = self.txSent[hash].tx
i++
}
self.send(txs, 1)
}
}
func (self *LesTxRelay) Discard(hashes []common.Hash) {
self.lock.Lock()
defer self.lock.Unlock()
for _, hash := range hashes {
delete(self.txSent, hash)
delete(self.txPending, hash)
}
}
|
