|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace BitWasp\Bitcoin\Networking\Peer; |
|
4
|
|
|
|
|
5
|
|
|
use BitWasp\Bitcoin\Networking\DnsSeeds\DnsSeedList; |
|
6
|
|
|
use BitWasp\Bitcoin\Networking\Ip\Ipv4; |
|
7
|
|
|
use BitWasp\Bitcoin\Networking\Services; |
|
8
|
|
|
use BitWasp\Bitcoin\Networking\Structure\NetworkAddress; |
|
9
|
|
|
use BitWasp\Bitcoin\Networking\Structure\NetworkAddressInterface; |
|
10
|
|
|
use React\Dns\Resolver\Resolver; |
|
11
|
|
|
use React\Promise\Deferred; |
|
12
|
|
|
|
|
13
|
|
|
class Locator |
|
14
|
|
|
{ |
|
15
|
|
|
|
|
16
|
|
|
/** |
|
17
|
|
|
* @var Resolver |
|
18
|
|
|
*/ |
|
19
|
|
|
private $dns; |
|
20
|
|
|
|
|
21
|
|
|
/** |
|
22
|
|
|
* @var DnsSeedList |
|
23
|
|
|
*/ |
|
24
|
|
|
private $seeds; |
|
25
|
|
|
|
|
26
|
|
|
/** |
|
27
|
|
|
* @var NetworkAddressInterface[] |
|
28
|
|
|
*/ |
|
29
|
|
|
private $knownAddresses = []; |
|
30
|
|
|
|
|
31
|
|
|
/** |
|
32
|
|
|
* Locator constructor. |
|
33
|
|
|
* @param DnsSeedList $list |
|
34
|
|
|
* @param Resolver $dns |
|
35
|
|
|
*/ |
|
36
|
9 |
|
public function __construct(DnsSeedList $list, Resolver $dns) |
|
37
|
|
|
{ |
|
38
|
9 |
|
$this->seeds = $list; |
|
39
|
9 |
|
$this->dns = $dns; |
|
40
|
9 |
|
} |
|
41
|
|
|
|
|
42
|
|
|
/** |
|
43
|
|
|
* @param int $numSeeds |
|
44
|
|
|
* @return \React\Promise\Promise|\React\Promise\PromiseInterface |
|
45
|
|
|
*/ |
|
46
|
|
|
private function getPeerList($numSeeds = 1) |
|
47
|
|
|
{ |
|
48
|
|
|
$peerList = new Deferred(); |
|
49
|
|
|
|
|
50
|
|
|
// Take $numSeeds |
|
51
|
|
|
$seedHosts = $this->seeds->getHosts(); |
|
52
|
|
|
shuffle($seedHosts); |
|
53
|
|
|
$seeds = array_slice($seedHosts, 0, min($numSeeds, count($seedHosts))); |
|
54
|
|
|
|
|
55
|
|
|
// Connect to $numSeeds peers |
|
56
|
|
|
/** @var Peer[] $vNetAddr */ |
|
57
|
|
|
$vNetAddr = []; |
|
58
|
|
|
$c = 0; |
|
59
|
|
|
foreach ($seeds as $seed) { |
|
60
|
|
|
$this->dns |
|
61
|
|
|
->resolve($seed) |
|
62
|
|
|
->then(function ($ipList) use (&$vNetAddr, $peerList, &$numSeeds, &$c) { |
|
63
|
|
|
$vNetAddr = array_merge($vNetAddr, $ipList); |
|
64
|
|
|
if ($numSeeds === ++$c) { |
|
65
|
|
|
$peerList->resolve($vNetAddr); |
|
66
|
|
|
} |
|
67
|
|
|
}, function ($error) use ($peerList) { |
|
68
|
|
|
$peerList->reject($error); |
|
69
|
6 |
|
}) |
|
70
|
|
|
; |
|
71
|
6 |
|
} |
|
72
|
|
|
|
|
73
|
|
|
// Compile the list of lists of peers into $this->knownAddresses |
|
74
|
6 |
|
return $peerList->promise(); |
|
75
|
6 |
|
} |
|
76
|
6 |
|
|
|
77
|
|
|
/** |
|
78
|
|
|
* Connect to $numSeeds DNS seeds |
|
79
|
|
|
* |
|
80
|
6 |
|
* @param int $numSeeds |
|
81
|
6 |
|
* @return \React\Promise\Promise|\React\Promise\PromiseInterface |
|
82
|
6 |
|
*/ |
|
83
|
6 |
|
public function queryDnsSeeds($numSeeds = 1) |
|
84
|
6 |
|
{ |
|
85
|
|
|
$deferred = new Deferred(); |
|
86
|
5 |
|
$this |
|
87
|
5 |
|
->getPeerList($numSeeds) |
|
88
|
5 |
|
->then( |
|
89
|
3 |
|
function (array $vPeerVAddrs) use ($deferred) { |
|
90
|
|
|
shuffle($vPeerVAddrs); |
|
91
|
1 |
|
|
|
92
|
6 |
|
/** @var NetworkAddressInterface[] $addresses */ |
|
93
|
|
|
$addresses = []; |
|
94
|
4 |
|
foreach ($vPeerVAddrs as $ip) { |
|
95
|
|
|
$addresses[] = new NetworkAddress( |
|
96
|
|
|
Services::NETWORK, |
|
97
|
6 |
|
new Ipv4($ip), |
|
98
|
|
|
8333 |
|
99
|
|
|
); |
|
100
|
|
|
} |
|
101
|
|
|
|
|
102
|
|
|
$this->knownAddresses = array_merge( |
|
103
|
|
|
$this->knownAddresses, |
|
104
|
|
|
$addresses |
|
105
|
|
|
); |
|
106
|
6 |
|
|
|
107
|
|
|
$deferred->resolve($this); |
|
108
|
6 |
|
}, |
|
109
|
4 |
|
function ($error) use ($deferred) { |
|
110
|
6 |
|
$deferred->reject($error); |
|
111
|
6 |
|
} |
|
112
|
|
|
) |
|
113
|
5 |
|
; |
|
114
|
|
|
|
|
115
|
|
|
return $deferred->promise(); |
|
116
|
5 |
|
} |
|
117
|
5 |
|
|
|
118
|
5 |
|
/** |
|
119
|
5 |
|
* @return NetworkAddressInterface[] |
|
120
|
5 |
|
*/ |
|
121
|
2 |
|
public function getKnownAddresses() |
|
122
|
3 |
|
{ |
|
123
|
3 |
|
return $this->knownAddresses; |
|
124
|
|
|
} |
|
125
|
5 |
|
|
|
126
|
5 |
|
/** |
|
127
|
|
|
* Pop an address from the discovered peers |
|
128
|
3 |
|
* |
|
129
|
|
|
* @return NetworkAddressInterface |
|
130
|
5 |
|
* @throws \Exception |
|
131
|
6 |
|
*/ |
|
132
|
3 |
|
public function popAddress() |
|
133
|
1 |
|
{ |
|
134
|
3 |
|
if (count($this->knownAddresses) < 1) { |
|
135
|
4 |
|
throw new \Exception('No peers'); |
|
136
|
|
|
} |
|
137
|
|
|
|
|
138
|
6 |
|
return array_pop($this->knownAddresses); |
|
139
|
|
|
} |
|
140
|
|
|
} |
|
141
|
|
|
|
Bit-Wasp /
bitcoin-p2p-php
