|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace BitWasp\Bitcoin\Script\Classifier; |
|
4
|
|
|
|
|
5
|
|
|
use BitWasp\Bitcoin\Script\Parser\Operation; |
|
6
|
|
|
use BitWasp\Bitcoin\Crypto\EcAdapter\Impl\PhpEcc\Key\PublicKey; |
|
7
|
|
|
use BitWasp\Bitcoin\Script\Opcodes; |
|
8
|
|
|
use BitWasp\Bitcoin\Script\ScriptInterface; |
|
9
|
|
|
|
|
10
|
|
|
class OutputClassifier implements ScriptClassifierInterface |
|
11
|
|
|
{ |
|
12
|
|
|
/** |
|
13
|
|
|
* @var \BitWasp\Bitcoin\Script\Parser\Operation[] |
|
14
|
|
|
*/ |
|
15
|
|
|
private $decoded; |
|
16
|
|
|
|
|
17
|
|
|
/** |
|
18
|
|
|
* @param ScriptInterface $script |
|
19
|
|
|
*/ |
|
20
|
645 |
|
public function __construct(ScriptInterface $script) |
|
21
|
|
|
{ |
|
22
|
645 |
|
$this->decoded = $script->getScriptParser()->decode(); |
|
23
|
645 |
|
} |
|
24
|
|
|
|
|
25
|
|
|
/** |
|
26
|
|
|
* @return bool |
|
27
|
|
|
*/ |
|
28
|
201 |
|
public function isPayToPublicKey() |
|
29
|
|
|
{ |
|
30
|
201 |
|
if (count($this->decoded) < 1 || !$this->decoded[0]->isPush()) { |
|
31
|
159 |
|
return false; |
|
32
|
|
|
} |
|
33
|
|
|
|
|
34
|
60 |
|
$size = $this->decoded[0]->getDataSize(); |
|
35
|
60 |
|
if ($size === 33 || $size === 65) { |
|
36
|
42 |
|
$op = $this->decoded[1]; |
|
37
|
42 |
|
if (!$op->isPush() && $op->getOp() === Opcodes::OP_CHECKSIG) { |
|
38
|
42 |
|
return true; |
|
39
|
|
|
} |
|
40
|
|
|
} |
|
41
|
|
|
|
|
42
|
18 |
|
return false; |
|
43
|
|
|
} |
|
44
|
|
|
|
|
45
|
|
|
/** |
|
46
|
|
|
* @return bool |
|
47
|
|
|
*/ |
|
48
|
159 |
|
public function isPayToPublicKeyHash() |
|
49
|
|
|
{ |
|
50
|
159 |
|
if (count($this->decoded) !== 5) { |
|
51
|
60 |
|
return false; |
|
52
|
|
|
} |
|
53
|
|
|
|
|
54
|
111 |
|
$dup = $this->decoded[0]; |
|
55
|
111 |
|
$hash = $this->decoded[1]; |
|
56
|
111 |
|
$buf = $this->decoded[2]; |
|
57
|
111 |
|
$eq = $this->decoded[3]; |
|
58
|
111 |
|
$checksig = $this->decoded[4]; |
|
59
|
|
|
|
|
60
|
111 |
|
foreach ([$dup, $hash, $eq, $checksig] as $op) { |
|
61
|
|
|
/** @var Operation $op */ |
|
62
|
111 |
|
if ($op->isPush()) { |
|
63
|
24 |
|
return false; |
|
64
|
|
|
} |
|
65
|
111 |
|
} |
|
66
|
|
|
|
|
67
|
87 |
|
return $dup->getOp() === Opcodes::OP_DUP |
|
68
|
87 |
|
&& $hash->getOp() === Opcodes::OP_HASH160 |
|
69
|
87 |
|
&& $buf->isPush() && $buf->getDataSize() === 20 |
|
70
|
87 |
|
&& $eq->getOp() === Opcodes::OP_EQUALVERIFY |
|
71
|
87 |
|
&& $checksig->getOp() === Opcodes::OP_CHECKSIG; |
|
72
|
|
|
} |
|
73
|
|
|
|
|
74
|
|
|
/** |
|
75
|
|
|
* @return bool |
|
76
|
|
|
*/ |
|
77
|
291 |
|
public function isPayToScriptHash() |
|
78
|
|
|
{ |
|
79
|
291 |
|
if (count($this->decoded) !== 3) { |
|
80
|
237 |
|
return false; |
|
81
|
|
|
} |
|
82
|
|
|
|
|
83
|
108 |
|
$hash = $this->decoded[0]; |
|
84
|
108 |
|
if ($hash->isPush() || !$hash->getOp() === Opcodes::OP_HASH160) { |
|
85
|
18 |
|
return false; |
|
86
|
|
|
} |
|
87
|
|
|
|
|
88
|
90 |
|
$buffer = $this->decoded[1]; |
|
89
|
90 |
|
if (!$buffer->isPush() || $buffer->getDataSize() !== 20) { |
|
90
|
6 |
|
return false; |
|
91
|
|
|
} |
|
92
|
|
|
|
|
93
|
84 |
|
$eq = $this->decoded[2]; |
|
94
|
84 |
|
return !$eq->isPush() && $eq->getOp() === Opcodes::OP_EQUAL; |
|
95
|
|
|
} |
|
96
|
|
|
|
|
97
|
|
|
/** |
|
98
|
|
|
* @return bool |
|
99
|
|
|
*/ |
|
100
|
171 |
|
public function isMultisig() |
|
101
|
|
|
{ |
|
102
|
171 |
|
$count = count($this->decoded); |
|
103
|
171 |
|
if ($count <= 3) { |
|
104
|
60 |
|
return false; |
|
105
|
|
|
} |
|
106
|
|
|
|
|
107
|
111 |
|
$mOp = $this->decoded[0]; |
|
108
|
111 |
|
$nOp = $this->decoded[$count - 2]; |
|
109
|
111 |
|
$checksig = $this->decoded[$count - 1]; |
|
110
|
111 |
|
if ($mOp->isPush() || $nOp->isPush() || $checksig->isPush()) { |
|
111
|
|
|
return false; |
|
112
|
|
|
} |
|
113
|
|
|
|
|
114
|
|
|
/** @var Operation[] $vKeys */ |
|
115
|
111 |
|
$vKeys = array_slice($this->decoded, 1, -2); |
|
116
|
111 |
|
foreach ($vKeys as $key) { |
|
117
|
111 |
|
if (!$key->isPush() || !PublicKey::isCompressedOrUncompressed($key->getData())) { |
|
|
|
|
|
|
118
|
57 |
|
return false; |
|
119
|
|
|
} |
|
120
|
54 |
|
} |
|
121
|
|
|
|
|
122
|
54 |
|
return $mOp->getOp() >= Opcodes::OP_0 |
|
123
|
54 |
|
&& $nOp->getOp() <= Opcodes::OP_16 |
|
124
|
54 |
|
&& $checksig->getOp() === Opcodes::OP_CHECKMULTISIG; |
|
125
|
|
|
} |
|
126
|
|
|
|
|
127
|
|
|
/** |
|
128
|
|
|
* @return string |
|
129
|
|
|
*/ |
|
130
|
102 |
|
public function classify() |
|
131
|
|
|
{ |
|
132
|
102 |
|
if ($this->isPayToPublicKey()) { |
|
133
|
6 |
|
return self::PAYTOPUBKEY; |
|
134
|
96 |
|
} elseif ($this->isPayToPublicKeyHash()) { |
|
135
|
30 |
|
return self::PAYTOPUBKEYHASH; |
|
136
|
78 |
|
} elseif ($this->isPayToScriptHash()) { |
|
137
|
18 |
|
return self::PAYTOSCRIPTHASH; |
|
138
|
66 |
|
} elseif ($this->isMultisig()) { |
|
139
|
48 |
|
return self::MULTISIG; |
|
140
|
|
|
} |
|
141
|
|
|
|
|
142
|
18 |
|
return self::UNKNOWN; |
|
143
|
|
|
} |
|
144
|
|
|
} |
|
145
|
|
|
|
Bit-Wasp /
bitcoin-php
Unless you are absolutely sure that the expression can never be null because of other conditions, we strongly recommend to add an additional type check to your code: