|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace BitWasp\Bitcoin\Script\Path; |
|
4
|
|
|
|
|
5
|
|
|
use BitWasp\Bitcoin\Script\Parser\Operation; |
|
6
|
|
|
use BitWasp\Bitcoin\Script\ScriptFactory; |
|
7
|
|
|
use BitWasp\Bitcoin\Script\ScriptInterface; |
|
8
|
|
|
|
|
9
|
|
|
class ParsedScript |
|
10
|
|
|
{ |
|
11
|
|
|
/** |
|
12
|
|
|
* @var ScriptInterface |
|
13
|
|
|
*/ |
|
14
|
|
|
private $script; |
|
15
|
|
|
|
|
16
|
|
|
/** |
|
17
|
|
|
* @var LogicOpNode |
|
18
|
|
|
*/ |
|
19
|
|
|
private $ast; |
|
20
|
|
|
|
|
21
|
|
|
/** |
|
22
|
|
|
* @var array |
|
23
|
|
|
*/ |
|
24
|
|
|
private $branchMap; |
|
25
|
|
|
|
|
26
|
|
|
/** |
|
27
|
|
|
* @var array |
|
28
|
|
|
*/ |
|
29
|
|
|
private $descriptorMap; |
|
30
|
|
|
|
|
31
|
|
|
/** |
|
32
|
|
|
* ParsedScript constructor. |
|
33
|
|
|
* @param ScriptInterface $script |
|
34
|
|
|
* @param LogicOpNode $ast |
|
35
|
|
|
* @param ScriptBranch[] $branches |
|
36
|
|
|
*/ |
|
37
|
154 |
|
public function __construct(ScriptInterface $script, LogicOpNode $ast, array $branches) |
|
38
|
|
|
{ |
|
39
|
154 |
|
if (!$ast->isRoot()) { |
|
40
|
|
|
throw new \RuntimeException("AST is for invalid node, wasn't root"); |
|
41
|
|
|
} |
|
42
|
|
|
|
|
43
|
154 |
|
$descriptorIdx = 0; |
|
44
|
154 |
|
$keyedBranchMap = []; // idx => ScriptBranch |
|
45
|
154 |
|
$keyedIdxMap = []; // descriptor => ScriptBranch |
|
46
|
154 |
|
foreach ($branches as $branch) { |
|
47
|
154 |
|
$descriptor = $branch->getPath(); |
|
48
|
154 |
|
$descriptorKey = json_encode($descriptor); |
|
49
|
154 |
|
if (array_key_exists($descriptorKey, $keyedBranchMap)) { |
|
50
|
|
|
throw new \RuntimeException("Duplicate branch descriptor, invalid ScriptBranch found"); |
|
51
|
|
|
} |
|
52
|
|
|
|
|
53
|
154 |
|
$keyedBranchMap[] = $branch; |
|
54
|
154 |
|
$keyedIdxMap[$descriptorKey] = $descriptorIdx; |
|
55
|
154 |
|
$descriptorIdx++; |
|
56
|
|
|
} |
|
57
|
|
|
|
|
58
|
154 |
|
$this->branchMap = $keyedBranchMap; |
|
59
|
154 |
|
$this->descriptorMap = $keyedIdxMap; |
|
60
|
154 |
|
$this->script = $script; |
|
61
|
154 |
|
$this->ast = $ast; |
|
62
|
154 |
|
} |
|
63
|
|
|
|
|
64
|
|
|
/** |
|
65
|
|
|
* @return bool |
|
66
|
|
|
*/ |
|
67
|
136 |
|
public function hasMultipleBranches() |
|
68
|
|
|
{ |
|
69
|
136 |
|
return $this->ast->hasChildren(); |
|
70
|
|
|
} |
|
71
|
|
|
|
|
72
|
|
|
/** |
|
73
|
|
|
* Returns a list of paths for this script. This is not |
|
74
|
|
|
* always guaranteed to be in order, so take care that |
|
75
|
|
|
* you actually work out the paths in advance of signing, |
|
76
|
|
|
* and hard code them somehow. |
|
77
|
|
|
* |
|
78
|
|
|
* @return array[] - array of paths |
|
79
|
|
|
*/ |
|
80
|
|
|
public function getPaths() |
|
81
|
|
|
{ |
|
82
|
18 |
|
return array_map(function (ScriptBranch $branch) { |
|
83
|
18 |
|
return $branch->getPath(); |
|
84
|
18 |
|
}, $this->branchMap); |
|
85
|
|
|
} |
|
86
|
|
|
|
|
87
|
|
|
/** |
|
88
|
|
|
* Look up the branch idx by it's path |
|
89
|
|
|
* |
|
90
|
|
|
* @param array $branchDesc |
|
91
|
|
|
* @return int |
|
92
|
|
|
*/ |
|
93
|
154 |
|
private function getBranchIdx(array $branchDesc) |
|
94
|
|
|
{ |
|
95
|
154 |
|
$descriptorKey = json_encode($branchDesc); |
|
96
|
|
|
|
|
97
|
154 |
|
if (array_key_exists($descriptorKey, $this->descriptorMap)) { |
|
98
|
154 |
|
return $this->descriptorMap[$descriptorKey]; |
|
99
|
|
|
} |
|
100
|
|
|
|
|
101
|
|
|
throw new \RuntimeException("Unknown branch"); |
|
102
|
|
|
} |
|
103
|
|
|
|
|
104
|
|
|
/** |
|
105
|
|
|
* Look up the branch by it's path |
|
106
|
|
|
* |
|
107
|
|
|
* @param array $branchDesc |
|
108
|
|
|
* @return bool|ScriptBranch |
|
109
|
|
|
*/ |
|
110
|
154 |
|
public function getBranchByPath(array $branchDesc) |
|
111
|
|
|
{ |
|
112
|
154 |
|
$idx = $this->getBranchIdx($branchDesc); |
|
113
|
154 |
|
if (!array_key_exists($idx, $this->branchMap)) { |
|
114
|
|
|
throw new \RuntimeException("Coding error, missing entry in branch map for desc"); |
|
115
|
|
|
} |
|
116
|
|
|
|
|
117
|
154 |
|
return $this->branchMap[$idx]; |
|
118
|
|
|
} |
|
119
|
|
|
|
|
120
|
|
|
/** |
|
121
|
|
|
* @param $branch |
|
122
|
|
|
* @return ScriptInterface|bool |
|
123
|
|
|
*/ |
|
124
|
|
|
public function getMutuallyExclusiveOps($branch) |
|
125
|
|
|
{ |
|
126
|
|
|
if (!($branch = $this->getBranchByPath($branch))) { |
|
127
|
|
|
return false; |
|
128
|
|
|
} |
|
129
|
|
|
|
|
130
|
|
|
$ops = []; |
|
131
|
|
|
foreach ($branch->getScriptSections() as $step) { |
|
132
|
|
|
/** @var Operation[] $step */ |
|
133
|
|
|
if (count($step) === 1 && $step[0]->isLogical()) { |
|
134
|
|
|
continue; |
|
135
|
|
|
} |
|
136
|
|
|
|
|
137
|
|
|
$ops = array_merge($ops, $step); |
|
138
|
|
|
} |
|
139
|
|
|
|
|
140
|
|
|
return ScriptFactory::fromOperations($ops); |
|
141
|
|
|
} |
|
142
|
|
|
} |
|
143
|
|
|
|
Bit-Wasp /
bitcoin-php
