V1Hasher::hashSequences() - Code Metrics - Inspection of "Allow custom Checker implementations" - Bit-Wasp/bitcoin-php - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#593)

by thomas

created 2018-01-02 00:17 UTC

V1Hasher::hashSequences() B

↳ Parent: V1Hasher

Complexity

Conditions	5
Paths	3

Size

Total Lines	13
Code Lines	7

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	6
CRAP Score	5.0729

Importance

Changes

Metric	Value
cc	5
eloc	7
nc	3
nop	1
dl	0
loc	13
ccs	6
cts	7
cp	0.8571
crap	5.0729
rs	8.8571
c	0
b	0
f	0

<?php

declare(strict_types=1);

namespace BitWasp\Bitcoin\Transaction\SignatureHash;

use BitWasp\Bitcoin\Crypto\Hash;
use BitWasp\Bitcoin\Script\ScriptInterface;
use BitWasp\Bitcoin\Serializer\Transaction\OutPointSerializer;
use BitWasp\Bitcoin\Serializer\Transaction\OutPointSerializerInterface;
use BitWasp\Bitcoin\Serializer\Transaction\TransactionOutputSerializer;
use BitWasp\Bitcoin\Transaction\TransactionInterface;
use BitWasp\Buffertools\Buffer;
use BitWasp\Buffertools\BufferInterface;
use BitWasp\Buffertools\Buffertools;

class V1Hasher extends SigHash
{
    /**
     * @var TransactionInterface
     */
    protected $transaction;

    /**
     * @var int
     */
    protected $amount;

    /**
     * @var TransactionOutputSerializer
     */
    protected $outputSerializer;

    /**
     * @var TransactionOutputSerializer
     */
    protected $outpointSerializer;

    /**
     * V1Hasher constructor.
     * @param TransactionInterface $transaction
     * @param int $amount
     * @param OutPointSerializerInterface $outpointSerializer
     * @param TransactionOutputSerializer|null $outputSerializer
     */
    public function __construct(
        TransactionInterface $transaction,
        int $amount,
        OutPointSerializerInterface $outpointSerializer = null,
        TransactionOutputSerializer $outputSerializer = null
    ) {
        $this->amount = $amount;
        $this->outputSerializer = $outputSerializer ?: new TransactionOutputSerializer();
        $this->outpointSerializer = $outpointSerializer ?: new OutPointSerializer();

        parent::__construct($transaction);
    }

    /**
     * @param int $sighashType
     * @return BufferInterface
     */
    public function hashPrevOuts(int $sighashType): BufferInterface
    {
        if (!($sighashType & SigHash::ANYONECANPAY)) {
            $binary = '';
            foreach ($this->tx->getInputs() as $input) {
                $binary .= $this->outpointSerializer->serialize($input->getOutPoint())->getBinary();
function acceptsInteger($int) { }

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

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
            }
            return Hash::sha256d(new Buffer($binary));
        }

        return new Buffer('', 32);
    }

    /**
     * @param int $sighashType
     * @return BufferInterface
     */
    public function hashSequences(int $sighashType): BufferInterface
    {
        if (!($sighashType & SigHash::ANYONECANPAY) && ($sighashType & 0x1f) !== SigHash::SINGLE && ($sighashType & 0x1f) !== SigHash::NONE) {
            $binary = '';
            foreach ($this->tx->getInputs() as $input) {
                $binary .= pack('V', $input->getSequence());
            }

            return Hash::sha256d(new Buffer($binary));
        }

        return new Buffer('', 32);
    }

    /**
     * @param int $sighashType
     * @param int $inputToSign
     * @return BufferInterface
     */
    public function hashOutputs(int $sighashType, int $inputToSign): BufferInterface
    {
        if (($sighashType & 0x1f) !== SigHash::SINGLE && ($sighashType & 0x1f) !== SigHash::NONE) {
            $binary = '';
            foreach ($this->tx->getOutputs() as $output) {
                $binary .= $this->outputSerializer->serialize($output)->getBinary();
            }
            return Hash::sha256d(new Buffer($binary));
        } elseif (($sighashType & 0x1f) === SigHash::SINGLE && $inputToSign < count($this->tx->getOutputs())) {
            return Hash::sha256d($this->outputSerializer->serialize($this->tx->getOutput($inputToSign)));
        }

        return new Buffer('', 32);
    }

    /**
     * Calculate the hash of the current transaction, when you are looking to
     * spend $txOut, and are signing $inputToSign. The SigHashType defaults to
     * SIGHASH_ALL
     *
     * @param ScriptInterface $txOutScript
     * @param int $inputToSign
     * @param int $sighashType
     * @return BufferInterface
     * @throws \Exception
     */
    public function calculate(
        ScriptInterface $txOutScript,
        int $inputToSign,
        int $sighashType = SigHash::ALL
    ): BufferInterface {

        $sighashType = (int) $sighashType;
        $hashPrevOuts = $this->hashPrevOuts($sighashType);
        $hashSequence = $this->hashSequences($sighashType);
        $hashOutputs = $this->hashOutputs($sighashType, $inputToSign);
        $input = $this->tx->getInput($inputToSign);

        $scriptBuf = $txOutScript->getBuffer();
        $preimage = new Buffer(
            pack("V", $this->tx->getVersion()) .
            $hashPrevOuts->getBinary() .
            $hashSequence->getBinary() .
            $this->outpointSerializer->serialize($input->getOutPoint())->getBinary() .
function acceptsInteger($int) { }

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

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
            Buffertools::numToVarInt($scriptBuf->getSize())->getBinary() . $scriptBuf->getBinary() .
            pack("P", $this->amount) .
            pack("V", $input->getSequence()) .
            $hashOutputs->getBinary() .
            pack("V", $this->tx->getLockTime()) .
            pack("V", $sighashType)
        );

        return Hash::sha256d($preimage);
    }
}


1		<?php
2
3		declare(strict_types=1);
4
5		namespace BitWasp\Bitcoin\Transaction\SignatureHash;
6
7		use BitWasp\Bitcoin\Crypto\Hash;
8		use BitWasp\Bitcoin\Script\ScriptInterface;
9		use BitWasp\Bitcoin\Serializer\Transaction\OutPointSerializer;
10		use BitWasp\Bitcoin\Serializer\Transaction\OutPointSerializerInterface;
11		use BitWasp\Bitcoin\Serializer\Transaction\TransactionOutputSerializer;
12		use BitWasp\Bitcoin\Transaction\TransactionInterface;
13		use BitWasp\Buffertools\Buffer;
14		use BitWasp\Buffertools\BufferInterface;
15		use BitWasp\Buffertools\Buffertools;
16
17		class V1Hasher extends SigHash
18		{
19		/**
20		* @var TransactionInterface
21		*/
22		protected $transaction;
23
24		/**
25		* @var int
26		*/
27		protected $amount;
28
29		/**
30		* @var TransactionOutputSerializer
31		*/
32		protected $outputSerializer;
33
34		/**
35		* @var TransactionOutputSerializer
36		*/
37		protected $outpointSerializer;
38
39		/**
40		* V1Hasher constructor.
41		* @param TransactionInterface $transaction
42		* @param int $amount
43		* @param OutPointSerializerInterface $outpointSerializer
44		* @param TransactionOutputSerializer\|null $outputSerializer
45		*/
46	48	public function __construct(
47		TransactionInterface $transaction,
48		int $amount,
49		OutPointSerializerInterface $outpointSerializer = null,
50		TransactionOutputSerializer $outputSerializer = null
51		) {
52	48	$this->amount = $amount;
53	48	$this->outputSerializer = $outputSerializer ?: new TransactionOutputSerializer();
54	48	$this->outpointSerializer = $outpointSerializer ?: new OutPointSerializer();
		0 ignored issues – show Documentation Bug introduced 2017-01-18 15:19 UTC by Report Bug Copy Issue Report It seems like `$outpointSerializer ?: n...on\OutPointSerializer()` of type `object<BitWasp\Bitcoin\S...intSerializerInterface>` is incompatible with the declared type `object<BitWasp\Bitcoin\S...actionOutputSerializer>` of property `$outpointSerializer`. Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property. Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property.. Loading history...
55	48	parent::__construct($transaction);
56	48	}
57
58		/**
59		* @param int $sighashType
60		* @return BufferInterface
61		*/
62	48	public function hashPrevOuts(int $sighashType): BufferInterface
63		{
64	48	if (!($sighashType & SigHash::ANYONECANPAY)) {
65	48	$binary = '';
66	48	foreach ($this->tx->getInputs() as $input) {
67	48	$binary .= $this->outpointSerializer->serialize($input->getOutPoint())->getBinary();
		0 ignored issues – show Documentation introduced 2017-01-18 15:19 UTC by Report Bug Copy Issue Report `$input->getOutPoint()` is of type `object<BitWasp\Bitcoin\T...tion\OutPointInterface>`, but the function expects a `object<BitWasp\Bitcoin\T...sactionOutputInterface>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
68		}
69	48	return Hash::sha256d(new Buffer($binary));
70		}
71
72		return new Buffer('', 32);
73		}
74
75		/**
76		* @param int $sighashType
77		* @return BufferInterface
78		*/
79	48	public function hashSequences(int $sighashType): BufferInterface
80		{
81	48	if (!($sighashType & SigHash::ANYONECANPAY) && ($sighashType & 0x1f) !== SigHash::SINGLE && ($sighashType & 0x1f) !== SigHash::NONE) {
82	48	$binary = '';
83	48	foreach ($this->tx->getInputs() as $input) {
84	48	$binary .= pack('V', $input->getSequence());
85		}
86
87	48	return Hash::sha256d(new Buffer($binary));
88		}
89
90		return new Buffer('', 32);
91		}
92
93		/**
94		* @param int $sighashType
95		* @param int $inputToSign
96		* @return BufferInterface
97		*/
98	48	public function hashOutputs(int $sighashType, int $inputToSign): BufferInterface
99		{
100	48	if (($sighashType & 0x1f) !== SigHash::SINGLE && ($sighashType & 0x1f) !== SigHash::NONE) {
101	48	$binary = '';
102	48	foreach ($this->tx->getOutputs() as $output) {
103	48	$binary .= $this->outputSerializer->serialize($output)->getBinary();
104		}
105	48	return Hash::sha256d(new Buffer($binary));
106		} elseif (($sighashType & 0x1f) === SigHash::SINGLE && $inputToSign < count($this->tx->getOutputs())) {
107		return Hash::sha256d($this->outputSerializer->serialize($this->tx->getOutput($inputToSign)));
108		}
109
110		return new Buffer('', 32);
111		}
112
113		/**
114		* Calculate the hash of the current transaction, when you are looking to
115		* spend $txOut, and are signing $inputToSign. The SigHashType defaults to
116		* SIGHASH_ALL
117		*
118		* @param ScriptInterface $txOutScript
119		* @param int $inputToSign
120		* @param int $sighashType
121		* @return BufferInterface
122		* @throws \Exception
123		*/
124	48	public function calculate(
125		ScriptInterface $txOutScript,
126		int $inputToSign,
127		int $sighashType = SigHash::ALL
128		): BufferInterface {
129
130	48	$sighashType = (int) $sighashType;
131	48	$hashPrevOuts = $this->hashPrevOuts($sighashType);
132	48	$hashSequence = $this->hashSequences($sighashType);
133	48	$hashOutputs = $this->hashOutputs($sighashType, $inputToSign);
134	48	$input = $this->tx->getInput($inputToSign);
135
136	48	$scriptBuf = $txOutScript->getBuffer();
137	48	$preimage = new Buffer(
138	48	pack("V", $this->tx->getVersion()) .
139	48	$hashPrevOuts->getBinary() .
140	48	$hashSequence->getBinary() .
141	48	$this->outpointSerializer->serialize($input->getOutPoint())->getBinary() .
		0 ignored issues – show Documentation introduced 2017-01-18 15:19 UTC by Report Bug Copy Issue Report `$input->getOutPoint()` is of type `object<BitWasp\Bitcoin\T...tion\OutPointInterface>`, but the function expects a `object<BitWasp\Bitcoin\T...sactionOutputInterface>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
142	48	Buffertools::numToVarInt($scriptBuf->getSize())->getBinary() . $scriptBuf->getBinary() .
143	48	pack("P", $this->amount) .
144	48	pack("V", $input->getSequence()) .
145	48	$hashOutputs->getBinary() .
146	48	pack("V", $this->tx->getLockTime()) .
147	48	pack("V", $sighashType)
148		);
149
150	48	return Hash::sha256d($preimage);
151		}
152		}
153

Bit-Wasp / bitcoin-php

Pull Request — master (#593)

V1Hasher::hashSequences() B

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