|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace BitWasp\Bitcoin\Transaction\SignatureHash; |
|
4
|
|
|
|
|
5
|
|
|
use BitWasp\Bitcoin\Crypto\Hash; |
|
6
|
|
|
use BitWasp\Bitcoin\Script\ScriptFactory; |
|
7
|
|
|
use BitWasp\Bitcoin\Transaction\TransactionInterface; |
|
8
|
|
|
use BitWasp\Buffertools\Buffer; |
|
9
|
|
|
use BitWasp\Buffertools\BufferInterface; |
|
10
|
|
|
use BitWasp\Bitcoin\Script\ScriptInterface; |
|
11
|
|
|
use BitWasp\Buffertools\Buffertools; |
|
12
|
|
|
|
|
13
|
|
|
class V1Hasher |
|
14
|
|
|
{ |
|
15
|
|
|
/** |
|
16
|
|
|
* @var TransactionInterface |
|
17
|
|
|
*/ |
|
18
|
|
|
private $transaction; |
|
19
|
|
|
|
|
20
|
|
|
/** |
|
21
|
|
|
* @var int|string |
|
22
|
|
|
*/ |
|
23
|
|
|
private $amount; |
|
24
|
|
|
|
|
25
|
|
|
/** |
|
26
|
|
|
* V1Hasher constructor. |
|
27
|
|
|
* @param TransactionInterface $transaction |
|
28
|
|
|
* @param int|string $amount |
|
29
|
54 |
|
*/ |
|
30
|
|
|
public function __construct(TransactionInterface $transaction, $amount) |
|
31
|
54 |
|
{ |
|
32
|
54 |
|
$this->transaction = $transaction; |
|
33
|
54 |
|
$this->amount = $amount; |
|
34
|
|
|
} |
|
35
|
|
|
|
|
36
|
|
|
/** |
|
37
|
|
|
* @param int $sighashType |
|
38
|
|
|
* @return Buffer|BufferInterface |
|
39
|
54 |
|
*/ |
|
40
|
|
|
public function hashPrevOuts($sighashType) |
|
41
|
54 |
|
{ |
|
42
|
54 |
|
if (!($sighashType & SigHashInterface::ANYONECANPAY)) { |
|
43
|
54 |
|
$binary = ''; |
|
44
|
54 |
|
foreach ($this->transaction->getInputs() as $input) { |
|
45
|
10 |
|
$binary .= $input->getOutPoint()->getBinary(); |
|
46
|
54 |
|
} |
|
47
|
|
|
return Hash::sha256d(new Buffer($binary)); |
|
48
|
|
|
} |
|
49
|
|
|
|
|
50
|
|
|
return new Buffer('', 32); |
|
51
|
|
|
} |
|
52
|
|
|
|
|
53
|
|
|
/** |
|
54
|
|
|
* @param int $sighashType |
|
55
|
|
|
* @return Buffer|BufferInterface |
|
56
|
54 |
|
*/ |
|
57
|
|
|
public function hashSequences($sighashType) |
|
58
|
54 |
|
{ |
|
59
|
54 |
|
if (!($sighashType & SigHashInterface::ANYONECANPAY) && ($sighashType & 0x1f) != SigHashInterface::SINGLE && ($sighashType & 0x1f) != SigHashInterface::NONE) { |
|
60
|
54 |
|
$binary = ''; |
|
61
|
54 |
|
foreach ($this->transaction->getInputs() as $input) { |
|
62
|
10 |
|
$binary .= Buffer::int($input->getSequence())->flip()->getBinary(); |
|
63
|
54 |
|
} |
|
64
|
|
|
return Hash::sha256d(new Buffer($binary)); |
|
65
|
|
|
} |
|
66
|
|
|
|
|
67
|
|
|
return new Buffer('', 32); |
|
68
|
|
|
} |
|
69
|
|
|
|
|
70
|
|
|
/** |
|
71
|
|
|
* @param int $sighashType |
|
72
|
|
|
* @param int $inputToSign |
|
73
|
|
|
* @return Buffer|BufferInterface |
|
74
|
54 |
|
*/ |
|
75
|
|
|
public function hashOutputs($sighashType, $inputToSign) |
|
76
|
54 |
|
{ |
|
77
|
54 |
|
if (($sighashType & 0x1f) !== SigHashInterface::SINGLE && ($sighashType & 0x1f) != SigHashInterface::NONE) { |
|
78
|
54 |
|
$binary = ''; |
|
79
|
54 |
|
foreach ($this->transaction->getOutputs() as $output) { |
|
80
|
10 |
|
$binary .= $output->getBinary(); |
|
81
|
54 |
|
} |
|
82
|
|
|
return Hash::sha256d(new Buffer($binary)); |
|
83
|
|
|
} elseif (($sighashType & 0x1f) == SigHashInterface::SINGLE && $inputToSign < count($this->transaction->getOutputs())) { |
|
84
|
|
|
return Hash::sha256d($this->transaction->getOutput($inputToSign)->getBuffer()); |
|
85
|
|
|
} |
|
86
|
|
|
|
|
87
|
|
|
return new Buffer('', 32); |
|
88
|
|
|
} |
|
89
|
|
|
|
|
90
|
|
|
/** |
|
91
|
|
|
* Calculate the hash of the current transaction, when you are looking to |
|
92
|
|
|
* spend $txOut, and are signing $inputToSign. The SigHashType defaults to |
|
93
|
|
|
* SIGHASH_ALL |
|
94
|
|
|
* |
|
95
|
|
|
* @param ScriptInterface $txOutScript |
|
96
|
|
|
* @param int $inputToSign |
|
97
|
|
|
* @param int $sighashType |
|
98
|
|
|
* @return BufferInterface |
|
99
|
|
|
* @throws \Exception |
|
100
|
|
|
*/ |
|
101
|
54 |
|
public function calculate(ScriptInterface $txOutScript, $inputToSign, $sighashType = SigHashInterface::ALL) |
|
102
|
|
|
{ |
|
103
|
54 |
|
$sighashType = (int) $sighashType; |
|
104
|
|
|
|
|
105
|
54 |
|
$hashPrevOuts = $this->hashPrevOuts($sighashType); |
|
106
|
54 |
|
$hashSequence = $this->hashSequences($sighashType); |
|
107
|
54 |
|
$hashOutputs = $this->hashOutputs($sighashType, $inputToSign); |
|
108
|
|
|
$input = $this->transaction->getInput($inputToSign); |
|
109
|
54 |
|
|
|
110
|
|
|
$scriptBuf = $txOutScript->getBuffer(); |
|
111
|
54 |
|
$preimage = new Buffer( |
|
112
|
54 |
|
pack("V", $this->transaction->getVersion()) . |
|
113
|
54 |
|
$hashPrevOuts->getBinary() . |
|
114
|
54 |
|
$hashSequence->getBinary() . |
|
115
|
54 |
|
$input->getOutPoint()->getBinary() . |
|
116
|
54 |
|
Buffertools::numToVarInt($scriptBuf->getSize())->getBinary() . $scriptBuf->getBinary() . |
|
117
|
54 |
|
Buffer::int($this->amount, 8)->flip()->getBinary() . |
|
118
|
54 |
|
pack("V", $input->getSequence()) . |
|
119
|
54 |
|
$hashOutputs->getBinary() . |
|
120
|
54 |
|
pack("V", $this->transaction->getLockTime()) . |
|
121
|
54 |
|
pack("V", $sighashType) |
|
122
|
10 |
|
); |
|
123
|
|
|
|
|
124
|
|
|
return Hash::sha256d($preimage); |
|
125
|
|
|
} |
|
126
|
|
|
} |
|
127
|
|
|
|
Bit-Wasp /
bitcoin-php
