TxWitnessSigner::sign() - Code Metrics - Inspection of "Segwit h2" - Bit-Wasp/bitcoin-php - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#240)

by thomas

created 2016-02-03 14:17 UTC

TxWitnessSigner::sign() C

↳ Parent: TxWitnessSigner

Complexity

Conditions	9
Paths	96

Size

Total Lines	60
Code Lines	36

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
c	1
b	0
f	0
dl	0
loc	60
rs	6.8358
cc	9
eloc	36
nc	96
nop	6

How to fix Long Method

<?php

namespace BitWasp\Bitcoin\Transaction\Factory;

use BitWasp\Bitcoin\Collection\Transaction\TransactionWitnessCollection;
use BitWasp\Bitcoin\Crypto\EcAdapter\Adapter\EcAdapterInterface;
use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PrivateKeyInterface;
use BitWasp\Bitcoin\Script\Classifier\OutputClassifier;
use BitWasp\Bitcoin\Script\Opcodes;
use BitWasp\Bitcoin\Script\Script;
use BitWasp\Bitcoin\Script\ScriptFactory;
use BitWasp\Bitcoin\Script\ScriptInterface;
use BitWasp\Bitcoin\Script\ScriptWitness;
use BitWasp\Bitcoin\Transaction\SignatureHash\SigHash;
use BitWasp\Bitcoin\Transaction\TransactionFactory;
use BitWasp\Bitcoin\Transaction\TransactionInterface;
use BitWasp\Buffertools\Buffer;

class TxWitnessSigner
{
    /**
     * @var EcAdapterInterface
     */
    private $ecAdapter;

    /**
     * @var TransactionInterface
     */
    private $tx;

    /**
     * @var SignatureData
     */
    private $signatures = [];

    /**
     * @var TxSigCreator
     */
    private $signatureCreator = [];

    /**
     * TxWitnessSigner constructor.
     * @param TransactionInterface $tx
     * @param EcAdapterInterface $ecAdapter
     */
    public function __construct(TransactionInterface $tx, EcAdapterInterface $ecAdapter)
    {
        $this->tx = $tx;
        $this->ecAdapter = $ecAdapter;
        $nInputs = count($tx->getInputs());
        for ($i = 0; $i < $nInputs; $i++) {
            $this->signatures[] = new SignatureData();
        }
    }

    public function sign($nInput, $amount, PrivateKeyInterface $privateKey, ScriptInterface $scriptPubKey, ScriptInterface $redeemScript = null, $sigHashType = SigHash::ALL)
    {

        if (!isset($this->signatureCreator[$nInput])) {
            $this->signatureCreator[$nInput] = new TxSigCreator($this->ecAdapter, $this->tx, $nInput, $amount);
        }

        /** @var TxSigCreator $sigCreator */
        $sigCreator = $this->signatureCreator[$nInput];
        $sigData = $this->signatures[$nInput];
        $sigVersion = 0;
        $scriptSig = $this->tx->getInput($nInput)->getScript();
        $witness = null;

        if ($sigData->scriptType === null) {
            $classifier = new OutputClassifier($scriptPubKey);
            $sigData->innerScriptType = $sigData->scriptType = $classifier->classify($sigData->solution);
        }

        if ($sigData->scriptType === OutputClassifier::PAYTOSCRIPTHASH) {
            $classifier = new OutputClassifier($redeemScript);
function notNullable(stdClass $x) { }

// Unsafe
function withoutCheck(stdClass $x = null) {
    notNullable($x);
}

// Safe - Alternative 1: Adding Additional Type-Check
function withCheck(stdClass $x = null) {
    if ($x instanceof stdClass) {
        notNullable($x);
    }
}

// Safe - Alternative 2: Changing Parameter
function withNonNullableParam(stdClass $x) {
    notNullable($x);
}
            $sigData->innerScriptType = $classifier->classify();
        }

        if ($sigData->scriptType === OutputClassifier::WITNESS_V0_KEYHASH) {
            $sigVersion = 1;
            $scriptPubKey->isWitness($witness);
function acceptsInteger($int) { }

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

// Instead of
acceptsInteger($x);

// we recommend to use
acceptsInteger((integer) $x);
            $witnessScript = ScriptFactory::sequence([Opcodes::OP_DUP, Opcodes::OP_HASH160, $witness->getProgram(), Opcodes::OP_EQUALVERIFY, Opcodes::OP_CHECKSIG]);
            $classifier = new OutputClassifier($witnessScript);
            $classifier->classify($sigData->solution);

            $sigData->witnessScript = $witnessScript;
            $scriptSig = new Script();
        }

        if ($sigData->scriptType === OutputClassifier::WITNESS_V0_SCRIPTHASH) {
            $sigVersion = 1;
            $scriptPubKey->isWitness($witness);
/** @return stdClass|null */
function mayReturnNull() { }

function doesNotAcceptNull(stdClass $x) { }

// With potential error.
function withoutCheck() {
    $x = mayReturnNull();
    doesNotAcceptNull($x); // Potential error here.
}

// Safe - Alternative 1
function withCheck1() {
    $x = mayReturnNull();
    if ( ! $x instanceof stdClass) {
        throw new \LogicException('$x must be defined.');
    }
    doesNotAcceptNull($x);
}

// Safe - Alternative 2
function withCheck2() {
    $x = mayReturnNull();
    if ($x instanceof stdClass) {
        doesNotAcceptNull($x);
    }
}

            $witnessScript = new Script(end($sigData->witnesses));
            $sigData->witnesses = $sigData->solution;

            $classifier = new OutputClassifier($witnessScript);
            $sigData->scriptType = $classifier->classify();
            $scriptSig = ScriptFactory::sequence($this->tx->getWitness($nInput)->all());
        }

        if ($sigData->scriptType === OutputClassifier::UNKNOWN) {
            throw new \RuntimeException('Unsupported scriptPubKey');
        }

        if ($sigData->signatures === null) {
            $sigCreator->extractSignatures($sigData, $scriptSig, $redeemScript);

        }

        $sigCreator->signInput($sigData, $privateKey, $redeemScript ?: $scriptPubKey, $sigHashType, $sigVersion);

        //print_r($sigData);
        return $this;
    }

    public function get()
    {
        $mutable = TransactionFactory::mutate($this->tx);
        $witnesses = [];
        foreach ($mutable->inputsMutator() as $idx => $input) {
            $sigData = $this->signatures[$idx];
            $sigCreator = $this->signatureCreator[$idx];
            $witness = null;
            $sig = $sigCreator->serializeSig($sigData, $witness);
            echo $sig->getHex() . "\n";
            $input->script($sig);
            $witnesses[$idx] = $witness ?: new ScriptWitness([]);
        }

        if (count($witnesses) > 0) {
            $mutable->witness(new TransactionWitnessCollection($witnesses));
        }

        $new = $mutable->done();
        return $new;
    }
}


1			<?php
2
3			namespace BitWasp\Bitcoin\Transaction\Factory;
4
5			use BitWasp\Bitcoin\Collection\Transaction\TransactionWitnessCollection;
6			use BitWasp\Bitcoin\Crypto\EcAdapter\Adapter\EcAdapterInterface;
7			use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PrivateKeyInterface;
8			use BitWasp\Bitcoin\Script\Classifier\OutputClassifier;
9			use BitWasp\Bitcoin\Script\Opcodes;
10			use BitWasp\Bitcoin\Script\Script;
11			use BitWasp\Bitcoin\Script\ScriptFactory;
12			use BitWasp\Bitcoin\Script\ScriptInterface;
13			use BitWasp\Bitcoin\Script\ScriptWitness;
14			use BitWasp\Bitcoin\Transaction\SignatureHash\SigHash;
15			use BitWasp\Bitcoin\Transaction\TransactionFactory;
16			use BitWasp\Bitcoin\Transaction\TransactionInterface;
17			use BitWasp\Buffertools\Buffer;
18
19			class TxWitnessSigner
20			{
21			/**
22			* @var EcAdapterInterface
23			*/
24			private $ecAdapter;
25
26			/**
27			* @var TransactionInterface
28			*/
29			private $tx;
30
31			/**
32			* @var SignatureData
33			*/
34			private $signatures = [];
35
36			/**
37			* @var TxSigCreator
38			*/
39			private $signatureCreator = [];
40
41			/**
42			* TxWitnessSigner constructor.
43			* @param TransactionInterface $tx
44			* @param EcAdapterInterface $ecAdapter
45			*/
46			public function __construct(TransactionInterface $tx, EcAdapterInterface $ecAdapter)
47			{
48			$this->tx = $tx;
49			$this->ecAdapter = $ecAdapter;
50			$nInputs = count($tx->getInputs());
51			for ($i = 0; $i < $nInputs; $i++) {
52			$this->signatures[] = new SignatureData();
53			}
54			}
55
56			public function sign($nInput, $amount, PrivateKeyInterface $privateKey, ScriptInterface $scriptPubKey, ScriptInterface $redeemScript = null, $sigHashType = SigHash::ALL)
57			{
58
59			if (!isset($this->signatureCreator[$nInput])) {
60			$this->signatureCreator[$nInput] = new TxSigCreator($this->ecAdapter, $this->tx, $nInput, $amount);
61			}
62
63			/** @var TxSigCreator $sigCreator */
64			$sigCreator = $this->signatureCreator[$nInput];
65			$sigData = $this->signatures[$nInput];
66			$sigVersion = 0;
67			$scriptSig = $this->tx->getInput($nInput)->getScript();
68			$witness = null;
69
70			if ($sigData->scriptType === null) {
71			$classifier = new OutputClassifier($scriptPubKey);
72			$sigData->innerScriptType = $sigData->scriptType = $classifier->classify($sigData->solution);
73			}
74
75			if ($sigData->scriptType === OutputClassifier::PAYTOSCRIPTHASH) {
76			$classifier = new OutputClassifier($redeemScript);
			0 ignored issues – show Bug introduced 2016-02-03 15:30 UTC by Report Bug Copy Issue Report It seems like `$redeemScript` defined by parameter `$redeemScript` on line `56` can be `null`; however, `BitWasp\Bitcoin\Script\C...assifier::__construct()` does not accept `null`, maybe add an additional type check? It seems like you allow that null is being passed for a parameter, however the function which is called does not seem to accept null. We recommend to add an additional type check (or disallow null for the parameter): function notNullable(stdClass $x) { } // Unsafe function withoutCheck(stdClass $x = null) { notNullable($x); } // Safe - Alternative 1: Adding Additional Type-Check function withCheck(stdClass $x = null) { if ($x instanceof stdClass) { notNullable($x); } } // Safe - Alternative 2: Changing Parameter function withNonNullableParam(stdClass $x) { notNullable($x); } Loading history...
77			$sigData->innerScriptType = $classifier->classify();
78			}
79
80			if ($sigData->scriptType === OutputClassifier::WITNESS_V0_KEYHASH) {
81			$sigVersion = 1;
82			$scriptPubKey->isWitness($witness);
			0 ignored issues – show Documentation introduced 2016-02-03 15:30 UTC by Report Bug Copy Issue Report `$witness` is of type `null`, but the function expects a `object<BitWasp\Bitcoin\Script\WitnessProgram>`. It seems like the type of the argument is not accepted by the function/method which you are calling. In some cases, in particular if PHP’s automatic type-juggling kicks in this might be fine. In other cases, however this might be a bug. We suggest to add an explicit type cast like in the following example: function acceptsInteger($int) { } $x = '123'; // string "123" // Instead of acceptsInteger($x); // we recommend to use acceptsInteger((integer) $x); Loading history...
83			$witnessScript = ScriptFactory::sequence([Opcodes::OP_DUP, Opcodes::OP_HASH160, $witness->getProgram(), Opcodes::OP_EQUALVERIFY, Opcodes::OP_CHECKSIG]);
84			$classifier = new OutputClassifier($witnessScript);
85			$classifier->classify($sigData->solution);
86
87			$sigData->witnessScript = $witnessScript;
88			$scriptSig = new Script();
89			}
90
91			if ($sigData->scriptType === OutputClassifier::WITNESS_V0_SCRIPTHASH) {
92			$sigVersion = 1;
93			$scriptPubKey->isWitness($witness);
			0 ignored issues – show Bug introduced 2016-02-03 15:30 UTC by Report Bug Copy Issue Report It seems like `$witness` defined by `null` on line `68` can be `null`; however, `BitWasp\Bitcoin\Script\S...tInterface::isWitness()` does not accept `null`, maybe add an additional type check? Unless you are absolutely sure that the expression can never be null because of other conditions, we strongly recommend to add an additional type check to your code: /** @return stdClass\|null */ function mayReturnNull() { } function doesNotAcceptNull(stdClass $x) { } // With potential error. function withoutCheck() { $x = mayReturnNull(); doesNotAcceptNull($x); // Potential error here. } // Safe - Alternative 1 function withCheck1() { $x = mayReturnNull(); if ( ! $x instanceof stdClass) { throw new \LogicException('$x must be defined.'); } doesNotAcceptNull($x); } // Safe - Alternative 2 function withCheck2() { $x = mayReturnNull(); if ($x instanceof stdClass) { doesNotAcceptNull($x); } } Loading history...
94
95			$witnessScript = new Script(end($sigData->witnesses));
96			$sigData->witnesses = $sigData->solution;
97
98			$classifier = new OutputClassifier($witnessScript);
99			$sigData->scriptType = $classifier->classify();
100			$scriptSig = ScriptFactory::sequence($this->tx->getWitness($nInput)->all());
101			}
102
103			if ($sigData->scriptType === OutputClassifier::UNKNOWN) {
104			throw new \RuntimeException('Unsupported scriptPubKey');
105			}
106
107			if ($sigData->signatures === null) {
108			$sigCreator->extractSignatures($sigData, $scriptSig, $redeemScript);
109
110			}
111
112			$sigCreator->signInput($sigData, $privateKey, $redeemScript ?: $scriptPubKey, $sigHashType, $sigVersion);
			0 ignored issues – show Unused Code introduced 2016-02-03 15:30 UTC by Report Bug Copy Issue Report The call to `TxSigCreator::signInput()` has too many arguments starting with `$sigVersion`. This check compares calls to functions or methods with their respective definitions. If the call has more arguments than are defined, it raises an issue. If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. In this case you can add the `@ignore` PhpDoc annotation to the duplicate definition and it will be ignored. Loading history...
113			//print_r($sigData);
114			return $this;
115			}
116
117			public function get()
118			{
119			$mutable = TransactionFactory::mutate($this->tx);
120			$witnesses = [];
121			foreach ($mutable->inputsMutator() as $idx => $input) {
122			$sigData = $this->signatures[$idx];
123			$sigCreator = $this->signatureCreator[$idx];
124			$witness = null;
125			$sig = $sigCreator->serializeSig($sigData, $witness);
126			echo $sig->getHex() . "\n";
127			$input->script($sig);
128			$witnesses[$idx] = $witness ?: new ScriptWitness([]);
129			}
130
131			if (count($witnesses) > 0) {
132			$mutable->witness(new TransactionWitnessCollection($witnesses));
133			}
134
135			$new = $mutable->done();
136			return $new;
137			}
138			}
139

Bit-Wasp / bitcoin-php

Pull Request — master (#240)

TxWitnessSigner::sign() C

Complexity

Size

Duplication

Importance

How to fix Long Method

Long Method

Duplication Side-by-Side

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