OutputClassifier::isMultisig() - Code Metrics - Inspection of "Removing the old transaction signer" - Bit-Wasp/bitcoin-php - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#275)

by thomas

created 2016-03-04 18:02 UTC

OutputClassifier::isMultisig() C

↳ Parent: OutputClassifier

Complexity

Conditions	11
Paths	7

Size

Total Lines	33
Code Lines	21

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	19
CRAP Score	11.307

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
dl	0
loc	33
ccs	19
cts	22
cp	0.8636
rs	5.2653
c	1
b	0
f	0
cc	11
eloc	21
nc	7
nop	1
crap	11.307

How to fix Complexity

<?php

namespace BitWasp\Bitcoin\Script\Classifier;

use BitWasp\Bitcoin\Script\Parser\Operation;
use BitWasp\Bitcoin\Crypto\EcAdapter\Impl\PhpEcc\Key\PublicKey;
use BitWasp\Bitcoin\Script\Opcodes;
use BitWasp\Bitcoin\Script\ScriptInterface;
use BitWasp\Buffertools\BufferInterface;

class OutputClassifier
{
    const PAYTOPUBKEY = 'pubkey';
    const PAYTOPUBKEYHASH = 'pubkeyhash';
    const PAYTOSCRIPTHASH = 'scripthash';
    const WITNESS_V0_KEYHASH = 'witness_v0_keyhash';
    const WITNESS_V0_SCRIPTHASH = 'witness_v0_scripthash';
    const MULTISIG = 'multisig';
    const UNKNOWN = 'unknown';
    const NONSTANDARD = 'nonstandard';

    /**
     * @var \BitWasp\Bitcoin\Script\Parser\Operation[]
     */
    private $decoded;

    /**
     * @var ScriptInterface
     */
    private $script;

    /**
     * @param ScriptInterface $script
     */
    public function __construct(ScriptInterface $script)
    {
        $this->script = $script;
        $this->decoded = $script->getScriptParser()->decode();
    }

    /**
     * @param BufferInterface|null $publicKey
     * @return bool
     */
    public function isPayToPublicKey(& $publicKey = null)
    {
        if (count($this->decoded) < 1 || !$this->decoded[0]->isPush()) {
            return false;
        }

        $size = $this->decoded[0]->getDataSize();
        if ($size === 33 || $size === 65) {
            $op = $this->decoded[1];
            if (!$op->isPush() && $op->getOp() === Opcodes::OP_CHECKSIG) {
                $publicKey = $this->decoded[0]->getData();
                return true;
            }
        }

        return false;
    }

    /**
     * @param BufferInterface|null $pubKeyHash
     * @return bool
     */
    public function isPayToPublicKeyHash(& $pubKeyHash = null)
    {
        if (count($this->decoded) !== 5) {
            return false;
        }

        $dup = $this->decoded[0];
        $hash = $this->decoded[1];
        $buf = $this->decoded[2];
        $eq = $this->decoded[3];
        $checksig = $this->decoded[4];

        foreach ([$dup, $hash, $eq, $checksig] as $op) {
            /** @var Operation $op */
            if ($op->isPush()) {
                return false;
            }
        }

        if ($dup->getOp() === Opcodes::OP_DUP
        && $hash->getOp() === Opcodes::OP_HASH160
        && $buf->isPush() && $buf->getDataSize() === 20
        && $eq->getOp() === Opcodes::OP_EQUALVERIFY
        && $checksig->getOp() === Opcodes::OP_CHECKSIG) {
            $pubKeyHash = $this->decoded[2]->getData();
            return true;
        }

        return false;
    }

    /**
     * @param BufferInterface|null $scriptHash
     * @return bool
     */
    public function isPayToScriptHash(& $scriptHash = null)
    {
        if (count($this->decoded) !== 3) {
            return false;
        }

        $hash = $this->decoded[0];
        if ($hash->isPush() || !$hash->getOp() === Opcodes::OP_HASH160) {
            return false;
        }

        $buffer = $this->decoded[1];
        if (!$buffer->isPush() || $buffer->getDataSize() !== 20) {
            return false;
        }


        $eq = $this->decoded[2];
        if (!$eq->isPush() && $eq->getOp() === Opcodes::OP_EQUAL) {
            $scriptHash = $this->decoded[1]->getData();
            return true;
        }

        return false;
    }

    /**
     * @param BufferInterface[] $keys
     * @return bool
     */
    public function isMultisig(& $keys = [])
    {
        $count = count($this->decoded);
        if ($count <= 3) {
            return false;
        }

        $mOp = $this->decoded[0];
        $nOp = $this->decoded[$count - 2];
        $checksig = $this->decoded[$count - 1];
        if ($mOp->isPush() || $nOp->isPush() || $checksig->isPush()) {
            return false;
        }

        /** @var Operation[] $vKeys */
        $vKeys = array_slice($this->decoded, 1, -2);
        $solutions = [];
        foreach ($vKeys as $key) {
            if (!$key->isPush() || !PublicKey::isCompressedOrUncompressed($key->getData())) {
                return false;
            }
            $solutions[] = $key->getData();
        }

        if ($mOp->getOp() >= Opcodes::OP_0
            && $nOp->getOp() <= Opcodes::OP_16
            && $checksig->getOp() === Opcodes::OP_CHECKMULTISIG) {
            $keys = $solutions;
            return true;
        }

        return false;
    }

    /**
     * @param BufferInterface $programHash
     * @return bool
     */
    public function isWitness(& $programHash = null)
    {
        $buffer = $this->script->getBuffer();
        $size = $buffer->getSize();

        if ($size < 4 || $size > 34) {
            return false;
        }

        $parser = $this->script->getScriptParser();
        $script = $parser->decode();
        if (count($script) !== 2 || !$script[1]->isPush()) {
            return false;
        }

        $version = $script[0]->getOp();
        if ($version != Opcodes::OP_0 && ($version < Opcodes::OP_1 || $version > Opcodes::OP_16)) {
            return false;
        }

        $witness = $script[1];
        if ($size === $witness->getDataSize() + 2) {
            $programHash = $witness->getData();
            return true;
        }

        return false;
    }

    /**
     * @param BufferInterface|BufferInterface[] $solutions
     * @return string
     */
    public function classify(&$solutions = null)
    {
        $type = self::UNKNOWN;
        $solution = null;
        if ($this->isPayToScriptHash($solution)) {
            /** @var BufferInterface $solution */
            $type = self::PAYTOSCRIPTHASH;
        } elseif ($this->isWitness($solution)) {
            /** @var BufferInterface $solution */
            if ($solution->getSize() == 20) {
                $type = self::WITNESS_V0_KEYHASH;
            } else {
                $type = self::WITNESS_V0_SCRIPTHASH;
            }
        } elseif ($this->isPayToPublicKey($solution)) {
            /** @var BufferInterface $solution */
            $type = self::PAYTOPUBKEY;
        } elseif ($this->isPayToPublicKeyHash($solution)) {
            /** @var BufferInterface $solution */
            $type = self::PAYTOPUBKEYHASH;
        } elseif ($this->isMultisig($solution)) {
function acceptsInteger($int) { }

$x = '123'; // string "123"

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
            /** @var BufferInterface[] $solution */
            $type = self::MULTISIG;
        }

        $solutions = $solution;

        return $type;
    }
}


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		use BitWasp\Buffertools\BufferInterface;
10
11		class OutputClassifier
12		{
13		const PAYTOPUBKEY = 'pubkey';
14		const PAYTOPUBKEYHASH = 'pubkeyhash';
15		const PAYTOSCRIPTHASH = 'scripthash';
16		const WITNESS_V0_KEYHASH = 'witness_v0_keyhash';
17		const WITNESS_V0_SCRIPTHASH = 'witness_v0_scripthash';
18		const MULTISIG = 'multisig';
19		const UNKNOWN = 'unknown';
20		const NONSTANDARD = 'nonstandard';
21
22		/**
23		* @var \BitWasp\Bitcoin\Script\Parser\Operation[]
24		*/
25		private $decoded;
26
27		/**
28		* @var ScriptInterface
29		*/
30		private $script;
31
32		/**
33		* @param ScriptInterface $script
34		*/
35	198	public function __construct(ScriptInterface $script)
36		{
37	198	$this->script = $script;
38	198	$this->decoded = $script->getScriptParser()->decode();
39	198	}
40
41		/**
42		* @param BufferInterface\|null $publicKey
43		* @return bool
44		*/
45	144	public function isPayToPublicKey(& $publicKey = null)
46		{
47	144	if (count($this->decoded) < 1 \|\| !$this->decoded[0]->isPush()) {
48	120	return false;
49		}
50
51	42	$size = $this->decoded[0]->getDataSize();
52	42	if ($size === 33 \|\| $size === 65) {
53	30	$op = $this->decoded[1];
54	30	if (!$op->isPush() && $op->getOp() === Opcodes::OP_CHECKSIG) {
55	30	$publicKey = $this->decoded[0]->getData();
56	30	return true;
57		}
58		}
59
60	12	return false;
61		}
62
63		/**
64		* @param BufferInterface\|null $pubKeyHash
65		* @return bool
66		*/
67	114	public function isPayToPublicKeyHash(& $pubKeyHash = null)
68		{
69	114	if (count($this->decoded) !== 5) {
70	54	return false;
71		}
72
73	66	$dup = $this->decoded[0];
74	66	$hash = $this->decoded[1];
75	66	$buf = $this->decoded[2];
76	66	$eq = $this->decoded[3];
77	66	$checksig = $this->decoded[4];
78
79	66	foreach ([$dup, $hash, $eq, $checksig] as $op) {
80		/** @var Operation $op */
81	66	if ($op->isPush()) {
82		return false;
83		}
84	66	}
85
86	66	if ($dup->getOp() === Opcodes::OP_DUP
87	66	&& $hash->getOp() === Opcodes::OP_HASH160
88	66	&& $buf->isPush() && $buf->getDataSize() === 20
89	66	&& $eq->getOp() === Opcodes::OP_EQUALVERIFY
90	66	&& $checksig->getOp() === Opcodes::OP_CHECKSIG) {
91	66	$pubKeyHash = $this->decoded[2]->getData();
92	66	return true;
93		}
94
95		return false;
96		}
97
98		/**
99		* @param BufferInterface\|null $scriptHash
100		* @return bool
101		*/
102	168	public function isPayToScriptHash(& $scriptHash = null)
103		{
104	168	if (count($this->decoded) !== 3) {
105	138	return false;
106		}
107
108	72	$hash = $this->decoded[0];
109	72	if ($hash->isPush() \|\| !$hash->getOp() === Opcodes::OP_HASH160) {
110		return false;
111		}
112
113	72	$buffer = $this->decoded[1];
114	72	if (!$buffer->isPush() \|\| $buffer->getDataSize() !== 20) {
115		return false;
116		}
117
118
119	72	$eq = $this->decoded[2];
120	72	if (!$eq->isPush() && $eq->getOp() === Opcodes::OP_EQUAL) {
121	72	$scriptHash = $this->decoded[1]->getData();
122	72	return true;
123		}
124
125		return false;
126		}
127
128		/**
129		* @param BufferInterface[] $keys
130		* @return bool
131		*/
132	78	public function isMultisig(& $keys = [])
133		{
134	78	$count = count($this->decoded);
135	78	if ($count <= 3) {
136	30	return false;
137		}
138
139	48	$mOp = $this->decoded[0];
140	48	$nOp = $this->decoded[$count - 2];
141	48	$checksig = $this->decoded[$count - 1];
142	48	if ($mOp->isPush() \|\| $nOp->isPush() \|\| $checksig->isPush()) {
143		return false;
144		}
145
146		/** @var Operation[] $vKeys */
147	48	$vKeys = array_slice($this->decoded, 1, -2);
148	48	$solutions = [];
149	48	foreach ($vKeys as $key) {
150	48	if (!$key->isPush() \|\| !PublicKey::isCompressedOrUncompressed($key->getData())) {
151		return false;
152		}
153	48	$solutions[] = $key->getData();
154	48	}
155
156	48	if ($mOp->getOp() >= Opcodes::OP_0
157	48	&& $nOp->getOp() <= Opcodes::OP_16
158	48	&& $checksig->getOp() === Opcodes::OP_CHECKMULTISIG) {
159	48	$keys = $solutions;
160	48	return true;
161		}
162
163		return false;
164		}
165
166		/**
167		* @param BufferInterface $programHash
168		* @return bool
169		*/
170	198	public function isWitness(& $programHash = null)
171		{
172	132	$buffer = $this->script->getBuffer();
173	132	$size = $buffer->getSize();
174
175	132	if ($size < 4 \|\| $size > 34) {
176	72	return false;
177		}
178
179	78	$parser = $this->script->getScriptParser();
180	78	$script = $parser->decode();
181	78	if (count($script) !== 2 \|\| !$script[1]->isPush()) {
182	66	return false;
183		}
184
185	30	$version = $script[0]->getOp();
186	30	if ($version != Opcodes::OP_0 && ($version < Opcodes::OP_1 \|\| $version > Opcodes::OP_16)) {
187		return false;
188		}
189
190	30	$witness = $script[1];
191	30	if ($size === $witness->getDataSize() + 2) {
192	30	$programHash = $witness->getData();
193	30	return true;
194	198	}
195
196		return false;
197		}
198
199		/**
200		* @param BufferInterface\|BufferInterface[] $solutions
201		* @return string
202		*/
203	138	public function classify(&$solutions = null)
204		{
205	138	$type = self::UNKNOWN;
206	138	$solution = null;
207	138	if ($this->isPayToScriptHash($solution)) {
208		/** @var BufferInterface $solution */
209	42	$type = self::PAYTOSCRIPTHASH;
210	138	} elseif ($this->isWitness($solution)) {
211		/** @var BufferInterface $solution */
212	30	if ($solution->getSize() == 20) {
213	12	$type = self::WITNESS_V0_KEYHASH;
214	12	} else {
215	18	$type = self::WITNESS_V0_SCRIPTHASH;
216		}
217	132	} elseif ($this->isPayToPublicKey($solution)) {
218		/** @var BufferInterface $solution */
219	18	$type = self::PAYTOPUBKEY;
220	132	} elseif ($this->isPayToPublicKeyHash($solution)) {
221		/** @var BufferInterface $solution */
222	66	$type = self::PAYTOPUBKEYHASH;
223	114	} elseif ($this->isMultisig($solution)) {
		0 ignored issues – show Documentation introduced 2016-02-03 03:56 UTC by Report Bug Copy Issue Report `$solution` is of type `object<BitWasp\Buffertools\BufferInterface>\|null`, but the function expects a `array<integer,object<Bit...tools\BufferInterface>>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
224		/** @var BufferInterface[] $solution */
225	36	$type = self::MULTISIG;
226	36	}
227
228	138	$solutions = $solution;
229
230	138	return $type;
231		}
232		}
233

Bit-Wasp / bitcoin-php

Pull Request — master (#275)

OutputClassifier::isMultisig() C

Complexity

Size

Duplication

Code Coverage

Importance

How to fix Complexity

Long Method

Duplication Side-by-Side

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