|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
declare(strict_types=1); |
|
4
|
|
|
|
|
5
|
|
|
namespace BitWasp\Bitcoin\Networking\Peer; |
|
6
|
|
|
|
|
7
|
|
|
use BitWasp\Bitcoin\Networking\Settings\NetworkSettings; |
|
8
|
|
|
use BitWasp\Bitcoin\Networking\Structure\NetworkAddress; |
|
9
|
|
|
use BitWasp\Bitcoin\Networking\Structure\NetworkAddressInterface; |
|
10
|
|
|
use Evenement\EventEmitter; |
|
11
|
|
|
use React\Promise\Deferred; |
|
12
|
|
|
use React\Promise\RejectedPromise; |
|
13
|
|
|
use React\Promise\Timer\TimeoutException; |
|
14
|
|
|
|
|
15
|
|
|
class Manager extends EventEmitter |
|
16
|
|
|
{ |
|
17
|
|
|
/** |
|
18
|
|
|
* @var Connector |
|
19
|
|
|
*/ |
|
20
|
|
|
private $connector; |
|
21
|
|
|
|
|
22
|
|
|
/** |
|
23
|
|
|
* @var Peer[] |
|
24
|
|
|
*/ |
|
25
|
|
|
private $outPeers = []; |
|
26
|
|
|
|
|
27
|
|
|
/** |
|
28
|
|
|
* @var Peer[] |
|
29
|
|
|
*/ |
|
30
|
|
|
private $inPeers = []; |
|
31
|
|
|
|
|
32
|
|
|
/** |
|
33
|
|
|
* @var int |
|
34
|
|
|
*/ |
|
35
|
|
|
private $nOutPeers = 0; |
|
36
|
|
|
|
|
37
|
|
|
/** |
|
38
|
|
|
* @var int |
|
39
|
|
|
*/ |
|
40
|
6 |
|
private $nInPeers = 0; |
|
41
|
|
|
|
|
42
|
6 |
|
/** |
|
43
|
6 |
|
* @var NetworkSettings |
|
44
|
|
|
*/ |
|
45
|
|
|
private $settings; |
|
46
|
|
|
|
|
47
|
|
|
/** |
|
48
|
|
|
* Manager constructor. |
|
49
|
|
|
* @param Connector $connector |
|
50
|
|
|
* @param NetworkSettings $settings |
|
51
|
3 |
|
*/ |
|
52
|
|
|
public function __construct(Connector $connector, NetworkSettings $settings) |
|
53
|
3 |
|
{ |
|
54
|
|
|
$this->connector = $connector; |
|
55
|
3 |
|
$this->settings = $settings; |
|
56
|
3 |
|
} |
|
57
|
3 |
|
|
|
58
|
|
|
/** |
|
59
|
3 |
|
* Store the newly connected peer, and trigger a new connection if they go away. |
|
60
|
3 |
|
* |
|
61
|
3 |
|
* @param Peer $peer |
|
62
|
|
|
* @return Peer |
|
63
|
|
|
*/ |
|
64
|
|
|
public function registerOutboundPeer(Peer $peer): Peer |
|
65
|
|
|
{ |
|
66
|
|
|
$next = $this->nOutPeers++; |
|
67
|
3 |
|
$peer->on('close', function ($peer) use ($next) { |
|
68
|
|
|
$this->emit('disconnect', [$peer]); |
|
69
|
3 |
|
unset($this->outPeers[$next]); |
|
70
|
3 |
|
}); |
|
71
|
|
|
|
|
72
|
|
|
$this->outPeers[$next] = $peer; |
|
73
|
3 |
|
$this->emit('outbound', [$peer]); |
|
74
|
3 |
|
return $peer; |
|
75
|
3 |
|
} |
|
76
|
|
|
|
|
77
|
|
|
/** |
|
78
|
|
|
* @param Peer $peer |
|
79
|
|
|
*/ |
|
80
|
|
|
public function registerInboundPeer(Peer $peer) |
|
81
|
3 |
|
{ |
|
82
|
|
|
$next = $this->nInPeers++; |
|
83
|
|
|
$this->inPeers[$next] = $peer; |
|
84
|
3 |
|
$peer->on('close', function () use ($next) { |
|
85
|
3 |
|
unset($this->inPeers[$next]); |
|
86
|
|
|
}); |
|
87
|
3 |
|
$this->emit('inbound', [$peer]); |
|
88
|
|
|
} |
|
89
|
|
|
|
|
90
|
|
|
/** |
|
91
|
|
|
* @param Listener $listener |
|
92
|
|
|
* @return $this |
|
93
|
|
|
*/ |
|
94
|
|
|
public function registerListener(Listener $listener) |
|
95
|
3 |
|
{ |
|
96
|
|
|
$listener->on('connection', function (Peer $peer) { |
|
97
|
3 |
|
$this->registerInboundPeer($peer); |
|
98
|
|
|
}); |
|
99
|
|
|
|
|
100
|
|
|
return $this; |
|
101
|
|
|
} |
|
102
|
|
|
|
|
103
|
|
|
/** |
|
104
|
3 |
|
* @param NetworkAddress $address |
|
105
|
|
|
* @return \React\Promise\PromiseInterface |
|
106
|
3 |
|
* @throws \Exception |
|
107
|
|
|
*/ |
|
108
|
|
|
public function connect(NetworkAddressInterface $address) |
|
109
|
|
|
{ |
|
110
|
3 |
|
return $this->connector->connect($address); |
|
111
|
2 |
|
} |
|
112
|
|
|
|
|
113
|
|
|
/** |
|
114
|
|
|
* @param Locator $locator |
|
115
|
|
|
* @return \React\Promise\Promise|\React\Promise\PromiseInterface |
|
116
|
|
|
*/ |
|
117
|
|
|
public function getAnotherPeer(Locator $locator) |
|
118
|
|
|
{ |
|
119
|
|
|
$deferred = new Deferred(); |
|
120
|
3 |
|
|
|
121
|
3 |
|
// Otherwise, rely on the Locator. |
|
122
|
|
|
try { |
|
123
|
3 |
|
$deferred->resolve($locator->popAddress()); |
|
124
|
|
|
} catch (\Exception $e) { |
|
125
|
3 |
|
$locator->queryDnsSeeds()->then( |
|
126
|
3 |
|
function () use ($deferred, $locator) { |
|
127
|
1 |
|
$deferred->resolve($locator->popAddress()); |
|
128
|
2 |
|
}, |
|
129
|
1 |
|
function ($error): RejectedPromise { |
|
130
|
2 |
|
return new RejectedPromise($error); |
|
131
|
3 |
|
} |
|
132
|
1 |
|
); |
|
133
|
3 |
|
} |
|
134
|
|
|
|
|
135
|
|
|
return $deferred->promise(); |
|
136
|
|
|
} |
|
137
|
|
|
|
|
138
|
|
|
/** |
|
139
|
|
|
* @param Locator $locator |
|
140
|
|
|
* @return \React\Promise\Promise|\React\Promise\PromiseInterface |
|
141
|
3 |
|
*/ |
|
142
|
|
|
public function attemptNextPeer(Locator $locator) |
|
143
|
3 |
|
{ |
|
144
|
3 |
|
$attempt = new Deferred(); |
|
145
|
3 |
|
|
|
146
|
2 |
|
$this |
|
147
|
|
|
->getAnotherPeer($locator) |
|
148
|
3 |
|
->then(function (NetworkAddress $address) use ($attempt) { |
|
149
|
|
|
return $this->connect($address)->then( |
|
150
|
|
|
function (Peer $peer) use ($attempt) { |
|
151
|
|
|
$this->registerOutboundPeer($peer); |
|
152
|
|
|
$attempt->resolve($peer); |
|
153
|
|
|
return $peer; |
|
154
|
|
|
}, |
|
155
|
|
|
function (\Exception $error) use ($attempt) { |
|
156
|
|
|
$attempt->reject($error); |
|
157
|
|
|
} |
|
158
|
|
|
); |
|
159
|
|
|
}, function ($error) use ($attempt) { |
|
160
|
|
|
$attempt->reject($error); |
|
161
|
|
|
}); |
|
162
|
|
|
|
|
163
|
|
|
return $attempt->promise(); |
|
164
|
|
|
} |
|
165
|
|
|
|
|
166
|
|
|
/** |
|
167
|
|
|
* @param Locator $locator |
|
168
|
|
|
* @param int $retries |
|
169
|
|
|
* @return \React\Promise\PromiseInterface |
|
170
|
|
|
*/ |
|
171
|
|
|
public function connectNextPeer(Locator $locator, int $retries = null) |
|
172
|
|
|
{ |
|
173
|
|
|
if ($retries === null) { |
|
174
|
|
|
$retries = $this->settings->getMaxConnectRetries(); |
|
175
|
|
|
} |
|
176
|
|
|
|
|
177
|
|
|
if (!(is_integer($retries) && $retries >= 0)) { |
|
178
|
|
|
throw new \InvalidArgumentException("Invalid retry count, must be an integer greater than zero"); |
|
179
|
|
|
} |
|
180
|
|
|
|
|
181
|
|
|
$errorBack = function ($error) use ($locator, $retries) { |
|
182
|
|
|
$allowContinue = false; |
|
183
|
|
|
if ($error instanceof \RuntimeException) { |
|
184
|
|
|
if ($error->getMessage() === "Connection refused") { |
|
185
|
|
|
$allowContinue = true; |
|
186
|
|
|
} |
|
187
|
|
|
} |
|
188
|
|
|
|
|
189
|
|
|
if ($error instanceof TimeoutException) { |
|
190
|
|
|
$allowContinue = true; |
|
191
|
|
|
} |
|
192
|
|
|
|
|
193
|
|
|
if (!$allowContinue) { |
|
194
|
|
|
throw $error; |
|
195
|
|
|
} |
|
196
|
|
|
|
|
197
|
|
|
if (0 >= $retries) { |
|
198
|
|
|
throw new \RuntimeException("Connection to peers failed: too many attempts"); |
|
199
|
|
|
} |
|
200
|
|
|
|
|
201
|
|
|
return $this->connectNextPeer($locator, $retries - 1); |
|
202
|
|
|
}; |
|
203
|
|
|
|
|
204
|
|
|
return $this |
|
205
|
|
|
->attemptNextPeer($locator) |
|
206
|
|
|
->then(null, $errorBack); |
|
207
|
|
|
} |
|
208
|
|
|
|
|
209
|
|
|
/** |
|
210
|
|
|
* @param Locator $locator |
|
211
|
|
|
* @param int $n |
|
212
|
|
|
* @return \React\Promise\Promise |
|
213
|
|
|
*/ |
|
214
|
|
|
public function connectToPeers(Locator $locator, int $n) |
|
215
|
|
|
{ |
|
216
|
|
|
$peers = []; |
|
217
|
|
|
for ($i = 0; $i < $n; $i++) { |
|
218
|
|
|
$peers[$i] = $this->connectNextPeer($locator); |
|
219
|
|
|
} |
|
220
|
|
|
|
|
221
|
|
|
return \React\Promise\all($peers); |
|
222
|
|
|
} |
|
223
|
|
|
} |
|
224
|
|
|
|
Bit-Wasp /
bitcoin-p2p-php
