|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace BitWasp\Bitcoin\Transaction\SignatureHash; |
|
4
|
|
|
|
|
5
|
|
|
use BitWasp\Bitcoin\Bitcoin; |
|
6
|
|
|
use BitWasp\Bitcoin\Crypto\Hash; |
|
7
|
|
|
use BitWasp\Bitcoin\Script\Script; |
|
8
|
|
|
use BitWasp\Bitcoin\Script\ScriptInterface; |
|
9
|
|
|
use BitWasp\Bitcoin\Serializer\Transaction\TransactionSerializer; |
|
10
|
|
|
use BitWasp\Bitcoin\Serializer\Transaction\TransactionSerializerInterface; |
|
11
|
|
|
use BitWasp\Bitcoin\Transaction\Mutator\TxMutator; |
|
12
|
|
|
use BitWasp\Bitcoin\Transaction\TransactionInterface; |
|
13
|
|
|
use BitWasp\Buffertools\Buffer; |
|
14
|
|
|
use BitWasp\Buffertools\BufferInterface; |
|
15
|
|
|
|
|
16
|
|
|
class Hasher extends SigHash |
|
17
|
|
|
{ |
|
18
|
|
|
/** |
|
19
|
|
|
* @var TransactionSerializer |
|
20
|
|
|
*/ |
|
21
|
|
|
private $txSerializer; |
|
22
|
|
|
|
|
23
|
|
|
/** |
|
24
|
|
|
* Hasher constructor. |
|
25
|
|
|
* @param TransactionInterface $transaction |
|
26
|
|
|
* @param TransactionSerializerInterface|null $txSerializer |
|
27
|
|
|
*/ |
|
28
|
86 |
|
public function __construct(TransactionInterface $transaction, TransactionSerializerInterface $txSerializer = null) |
|
29
|
|
|
{ |
|
30
|
86 |
|
$this->txSerializer = $txSerializer ?: new TransactionSerializer(); |
|
|
|
|
|
|
31
|
86 |
|
parent::__construct($transaction); |
|
32
|
86 |
|
} |
|
33
|
|
|
|
|
34
|
|
|
/** |
|
35
|
|
|
* Calculate the hash of the current transaction, when you are looking to |
|
36
|
|
|
* spend $txOut, and are signing $inputToSign. The SigHashType defaults to |
|
37
|
|
|
* SIGHASH_ALL, though SIGHASH_SINGLE, SIGHASH_NONE, SIGHASH_ANYONECANPAY |
|
38
|
|
|
* can be used. |
|
39
|
|
|
* |
|
40
|
|
|
* @param ScriptInterface $txOutScript |
|
41
|
|
|
* @param int $inputToSign |
|
42
|
|
|
* @param int $sighashType |
|
43
|
|
|
* @return BufferInterface |
|
44
|
|
|
* @throws \Exception |
|
45
|
|
|
*/ |
|
46
|
86 |
|
public function calculate(ScriptInterface $txOutScript, $inputToSign, $sighashType = SigHash::ALL) |
|
47
|
|
|
{ |
|
48
|
86 |
|
$math = Bitcoin::getMath(); |
|
49
|
86 |
|
$tx = new TxMutator($this->tx); |
|
50
|
86 |
|
$inputs = $tx->inputsMutator(); |
|
51
|
86 |
|
$outputs = $tx->outputsMutator(); |
|
52
|
|
|
|
|
53
|
|
|
// Default SIGHASH_ALL procedure: null all input scripts |
|
54
|
86 |
|
foreach ($inputs as $input) { |
|
55
|
86 |
|
$input->script(new Script); |
|
56
|
|
|
} |
|
57
|
|
|
|
|
58
|
86 |
|
$inputs[$inputToSign]->script($txOutScript); |
|
59
|
|
|
|
|
60
|
86 |
|
if (($sighashType & 31) === SigHash::NONE) { |
|
61
|
|
|
// Set outputs to empty vector, and set sequence number of inputs to 0. |
|
62
|
4 |
|
$outputs->null(); |
|
63
|
|
|
|
|
64
|
|
|
// Let the others update at will. Set sequence of inputs we're not signing to 0. |
|
65
|
4 |
|
foreach ($inputs as $i => $input) { |
|
66
|
4 |
|
if ($i !== $inputToSign) { |
|
67
|
4 |
|
$input->sequence(0); |
|
68
|
|
|
} |
|
69
|
|
|
} |
|
70
|
82 |
|
} elseif (($sighashType & 31) === SigHash::SINGLE) { |
|
71
|
|
|
// Resize output array to $inputToSign + 1, set remaining scripts to null, |
|
72
|
|
|
// and set sequence's to zero. |
|
73
|
8 |
|
$nOutput = $inputToSign; |
|
74
|
8 |
|
if ($nOutput >= count($this->tx->getOutputs())) { |
|
75
|
2 |
|
return Buffer::hex('0100000000000000000000000000000000000000000000000000000000000000', 32, $math); |
|
76
|
|
|
} |
|
77
|
|
|
|
|
78
|
|
|
// Resize, set to null |
|
79
|
8 |
|
$outputs->slice(0, $nOutput + 1); |
|
80
|
8 |
|
for ($i = 0; $i < $nOutput; $i++) { |
|
81
|
6 |
|
$outputs[$i]->null(); |
|
82
|
|
|
} |
|
83
|
|
|
|
|
84
|
|
|
// Let the others update at will. Set sequence of inputs we're not signing to 0 |
|
85
|
8 |
|
foreach ($inputs as $i => $input) { |
|
86
|
8 |
|
if ($i !== $inputToSign) { |
|
87
|
8 |
|
$input->sequence(0); |
|
88
|
|
|
} |
|
89
|
|
|
} |
|
90
|
|
|
} |
|
91
|
|
|
|
|
92
|
|
|
// This can happen regardless of whether it's ALL, NONE, or SINGLE |
|
93
|
86 |
|
if (($sighashType & SigHash::ANYONECANPAY) > 0) { |
|
94
|
7 |
|
$input = $inputs[$inputToSign]->done(); |
|
95
|
7 |
|
$inputs->null()->add($input); |
|
96
|
|
|
} |
|
97
|
|
|
|
|
98
|
86 |
|
return Hash::sha256d(new Buffer( |
|
99
|
86 |
|
$this->txSerializer->serialize($tx->done(), TransactionSerializer::NO_WITNESS)->getBinary() . |
|
100
|
86 |
|
pack('V', $sighashType) |
|
101
|
|
|
)); |
|
102
|
|
|
} |
|
103
|
|
|
} |
|
104
|
|
|
|
Bit-Wasp /
bitcoin-php
Our type inference engine has found a suspicous assignment of a value to a property. This check raises an issue when a value that can be of a given class or a super-class is assigned to a property that is type hinted more strictly.
Either this assignment is in error or an instanceof check should be added for that assignment.