SizeEstimation::estimateOutputsSize() - Code Metrics - Inspection of "test refactoring" - blocktrail/blocktrail-sdk-php - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#127)

by thomas

created 2018-11-03 16:12 UTC

SizeEstimation::estimateOutputsSize() A

↳ Parent: SizeEstimation

Complexity

Conditions	5
Paths	5

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	15
CRAP Score	5

Importance

Changes

Metric	Value
cc	5
nc	5
nop	1
dl	0
loc	25
ccs	15
cts	15
cp	1
crap	5
rs	9.2088
c	0
b	0
f	0

<?php

namespace Blocktrail\SDK;

use BitWasp\Bitcoin\Script\ScriptFactory;
use BitWasp\Bitcoin\Script\ScriptType;
use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PublicKeyInterface;
use \BitWasp\Bitcoin\Script\ScriptInfo\Multisig;
use \BitWasp\Bitcoin\Script\ScriptInfo\PayToPubKey;
use \BitWasp\Bitcoin\Script\Classifier\OutputClassifier;
use BitWasp\Bitcoin\Script\ScriptInterface;
use BitWasp\Bitcoin\Transaction\TransactionOutputInterface;

class SizeEstimation
{
    const SIZE_DER_SIGNATURE = 72;
    const SIZE_V0_P2WSH = 36;

    /**
     * @param bool $compressed
     * @return int
     */
    public static function getPublicKeySize($compressed = true) {
        return $compressed ? PublicKeyInterface::LENGTH_COMPRESSED : PublicKeyInterface::LENGTH_UNCOMPRESSED;
    }

    /**
     * @param int $length
     * @return int
     */
    public static function getLengthOfScriptLengthElement($length) {
        if ($length < 75) {
            return 1;
        } else if ($length <= 0xff) {
            return 2;
        } else if ($length <= 0xffff) {
            return 3;
        } else if ($length <= 0xffffffff) {
            return 5;
        } else {
            throw new \RuntimeException('Size of pushdata too large');
        }
    }

    /**
     * @param int $length
     * @return int
     */
    public static function getLengthOfVarInt($length) {
        if ($length < 253) {
            return 1;
        } else if ($length < 65535) {
            $num_bytes = 2;
        } else if ($length < 4294967295) {
            $num_bytes = 4;
        } else if ($length < 18446744073709551615) {
            $num_bytes = 8;
        } else {
            throw new \InvalidArgumentException("Invalid decimal");
        }
        return 1 + $num_bytes;
    }

    /**
     * @param array $vectorSizes
     * @return int|mixed
     */
    public static function getLengthOfVector(array $vectorSizes) {
        $vectorSize = self::getLengthOfVarInt(count($vectorSizes));
        foreach ($vectorSizes as $size) {
            $vectorSize += self::getLengthOfVarInt($size) + $size;
        }
        return $vectorSize;
    }

    /**
     * @param Multisig $multisig
     * @return array - first is array of stack sizes, second is script len
     */
    public static function estimateMultisigStackSize(Multisig $multisig) {
        $stackSizes = [0];
        for ($i = 0; $i < $multisig->getRequiredSigCount(); $i++) {
// count() is called on each iteration
for ($i=0; $i < count($collection); $i++) { }

// count() is only called once
for ($i=0, $c=count($collection); $i<$c; $i++) { }
            $stackSizes[] = self::SIZE_DER_SIGNATURE;
        }

        $scriptSize = 1; // OP_$m
        $keys = $multisig->getKeyBuffers();
        for ($i = 0, $n = $multisig->getKeyCount(); $i < $n; $i++) {
            $scriptSize += 1 + $keys[$i]->getSize();
        }

        $scriptSize += 1 + 1; // OP_$n OP_CHECKMULTISIG
        return [$stackSizes, $scriptSize];
    }

    /**
     * @param PayToPubKey $info
     * @return array - first is array of stack sizes, second is script len
     */
    public static function estimateP2PKStackSize(PayToPubKey $info) {
        $stackSizes = [self::SIZE_DER_SIGNATURE];

        $scriptSize = 1 + $info->getKeyBuffer()->getSize(); // PUSHDATA[<75] PUBLICKEY
        $scriptSize += 1; // OP_CHECKSIG
        return [$stackSizes, $scriptSize];
    }

    /**
     * @param bool $isCompressed
     * @return array - first is array of stack sizes, second is script len
     */
    public static function estimateP2PKHStackSize($isCompressed = true) {
        $pubKeySize = self::getPublicKeySize($isCompressed);
        $stackSizes = [self::SIZE_DER_SIGNATURE, $pubKeySize];

        $scriptSize = 1 + 1 + 1 + 20 + 1 + 1;
        return [$stackSizes, $scriptSize];
    }

    /**
     * @param array $stackSizes - array of integer size of a value (for scriptSig or witness)
     * @param bool $isWitness
     * @param ScriptInterface $redeemScript
     * @param ScriptInterface $witnessScript
     * @return array
     */
    public static function estimateSizeForStack(array $stackSizes, $isWitness, ScriptInterface $redeemScript = null, ScriptInterface $witnessScript = null) {
        assert(($witnessScript === null) || $isWitness);

        if ($isWitness) {
            $scriptSigSizes = [];
            $witnessSizes = $stackSizes;
            if ($witnessScript instanceof ScriptInterface) {
                $witnessSizes[] = $witnessScript->getBuffer()->getSize();
            }
        } else {
            $scriptSigSizes = $stackSizes;
            $witnessSizes = [];
        }

        if ($redeemScript instanceof ScriptInterface) {
            $scriptSigSizes[] = $redeemScript->getBuffer()->getSize();
        }

        $scriptSigSize = 0;
        foreach ($scriptSigSizes as $size) {
            $len = self::getLengthOfScriptLengthElement($size);
            $scriptSigSize += $len;
            $scriptSigSize += $size;
        }

        // Make sure to count the CScriptBase length prefix..
        $scriptSigSize += self::getLengthOfVarInt($scriptSigSize);

        // make sure this is set to 0 when not used.
        // Summing WitnessSize is used in addition to $withWitness
        // because a tx without witnesses _cannot_ use witness serialization
        // total witnessSize = 0 means don't use that format
        $witnessSize = 0;
        if (count($witnessSizes) > 0) {
            // witness has a prefix indicating `n` elements in vector
            $witnessSize = self::getLengthOfVector($witnessSizes);
        }
        return [$scriptSigSize, $witnessSize];
    }

    /**
     * @param ScriptInterface $script - not the scriptPubKey, might be SPK,RS,WS
     * @param ScriptInterface|null $redeemScript
     * @param ScriptInterface $witnessScript
     * @param bool $isWitness
     * @return array
     */
    public static function estimateInputFromScripts(ScriptInterface $script, ScriptInterface $redeemScript = null, ScriptInterface $witnessScript = null, $isWitness) {
        assert($witnessScript === null || $isWitness);
        $classifier = new OutputClassifier();
        if ($classifier->isMultisig($script)) {
            list ($stackSizes, ) = SizeEstimation::estimateMultisigStackSize(new Multisig($script));
<?php

class Certificate {
    const TRIPLEDES_CBC = 'ASDFGHJKL';

    private $key;

    public function __construct()
    {
        $this->key = Certificate::TRIPLEDES_CBC;
    }
}
        } else if ($classifier->isPayToPublicKey($script)) {
            list ($stackSizes, ) = SizeEstimation::estimateP2PKStackSize(new PayToPubKey($script));
<?php

class Certificate {
    const TRIPLEDES_CBC = 'ASDFGHJKL';

    private $key;

    public function __construct()
    {
        $this->key = Certificate::TRIPLEDES_CBC;
    }
}
        } else if ($classifier->isPayToPublicKeyHash($script)) {
            // defaults to compressed, tough luck
            list ($stackSizes, ) = SizeEstimation::estimateP2PKHStackSize();
<?php

class Certificate {
    const TRIPLEDES_CBC = 'ASDFGHJKL';

    private $key;

    public function __construct()
    {
        $this->key = Certificate::TRIPLEDES_CBC;
    }
}
        } else {
            throw new \InvalidArgumentException("Unsupported script type");
        }

        return self::estimateSizeForStack($stackSizes, $isWitness, $redeemScript, $witnessScript);
    }

    /**
     * @param UTXO $utxo
     * @return array
     */
    public static function estimateUtxo(UTXO $utxo) {
        return self::estimateUtxoFromScripts($utxo->scriptPubKey, $utxo->redeemScript, $utxo->witnessScript);
    }

    /**
     * @param ScriptInterface $scriptPubKey
     * @param ScriptInterface $redeemScript
     * @param ScriptInterface $witnessScript
     * @return array
     */
    public static function estimateUtxoFromScripts(
        ScriptInterface $scriptPubKey,
        ScriptInterface $redeemScript = null,
        ScriptInterface $witnessScript = null
    ) {
        $classifier = new OutputClassifier();
        $decodePK = $classifier->decode($scriptPubKey);
        $witness = false;
        if ($decodePK->getType() === ScriptType::P2SH) {
            if (null === $redeemScript) {
                throw new \RuntimeException("Can't estimate, missing redeem script");
            }
            $decodePK = $classifier->decode($redeemScript);
        }

        if ($decodePK->getType() === ScriptType::P2WKH) {
            $scriptSitu = ScriptFactory::scriptPubKey()->p2pkh($decodePK->getSolution());
            $decodePK = $classifier->decode($scriptSitu);
            $witness = true;
        } else if ($decodePK->getType() === ScriptType::P2WSH) {
            if (null === $witnessScript) {
                throw new \RuntimeException("Can't estimate, missing witness script");
            }
            $decodePK = $classifier->decode($witnessScript);
            $witness = true;
        }

        if (!in_array($decodePK->getType(), [ScriptType::MULTISIG, ScriptType::P2PKH, ScriptType::P2PK])) {
            throw new \RuntimeException("Unsupported script type");
        }

        $script = $decodePK->getScript();
        list ($scriptSig, $witness) = SizeEstimation::estimateInputFromScripts($script, $redeemScript, $witnessScript, $witness);
<?php

class Certificate {
    const TRIPLEDES_CBC = 'ASDFGHJKL';

    private $key;

    public function __construct()
    {
        $this->key = Certificate::TRIPLEDES_CBC;
    }
}

        return [
            "scriptSig" => $scriptSig,
            "witness" => $witness,
        ];
    }

    /**
     * @param UTXO[] $utxos
     * @param bool $withWitness
     * @return integer
     */
    public static function estimateInputsSize(array $utxos, $withWitness) {
        $inputSize = 0;
        $witnessSize = 0;
        foreach ($utxos as $utxo) {
            $estimate = SizeEstimation::estimateUtxo($utxo);
<?php

class Certificate {
    const TRIPLEDES_CBC = 'ASDFGHJKL';

    private $key;

    public function __construct()
    {
        $this->key = Certificate::TRIPLEDES_CBC;
    }
}
            $inputSize += 32 + 4 + 4;
            $inputSize += $estimate['scriptSig'];
            if ($withWitness) {
                $witnessSize += $estimate['witness'];
            }
        }

        if ($withWitness && $witnessSize != 0) {
            $inputSize += $witnessSize;
            $inputSize += 2; // flag bytes
        }

        return $inputSize;
    }

    /**
     * @param array $outputs
     * @return int
     */
    public static function estimateOutputsSize(array $outputs) {
        $outputSize = 0;
        foreach ($outputs as $output) {
            $size = 8;

            $scriptSize = null;
$myVar = 'Value';
$higher = false;

if (rand(1, 6) > 3) {
    $higher = true;
} else {
    $higher = false;
}
            if ($output instanceof TransactionOutputInterface) {
                $scriptSize = $output->getScript()->getBuffer()->getSize();
            } else {
                if (isset($output['scriptPubKey'])) {
                    if ($output['scriptPubKey'] instanceof ScriptInterface) {
                        $scriptSize = $output['scriptPubKey']->getBuffer()->getSize();
                    } else {
                        $scriptSize = strlen($output['scriptPubKey']) / 2;
                    }
                } else {
                    $scriptSize = 25;
                }
            }

            $size += SizeEstimation::getLengthOfVarInt($scriptSize) + $scriptSize;
<?php

class Certificate {
    const TRIPLEDES_CBC = 'ASDFGHJKL';

    private $key;

    public function __construct()
    {
        $this->key = Certificate::TRIPLEDES_CBC;
    }
}
            $outputSize += $size;
        }
        return $outputSize;
    }

    /**
     * @param UTXO[] $utxos
     * @param array $outputs
     * @return int
     */
    public static function estimateVsize(array $utxos, array $outputs) {
        return (int)ceil(self::estimateWeight($utxos, $outputs) / 4);
    }

    /**
     * @param UTXO[] $utxos
     * @param array $outputs
     * @return int
     */
    public static function estimateWeight(array $utxos, array $outputs) {
        $outputsSize = SizeEstimation::estimateOutputsSize($outputs);
<?php

class Certificate {
    const TRIPLEDES_CBC = 'ASDFGHJKL';

    private $key;

    public function __construct()
    {
        $this->key = Certificate::TRIPLEDES_CBC;
    }
}
        $outputsSize += SizeEstimation::getLengthOfVarInt(count($outputs));
<?php

class Certificate {
    const TRIPLEDES_CBC = 'ASDFGHJKL';

    private $key;

    public function __construct()
    {
        $this->key = Certificate::TRIPLEDES_CBC;
    }
}

        $baseSize = 4 +
            SizeEstimation::getLengthOfVarInt(count($utxos)) + SizeEstimation::estimateInputsSize($utxos, false) +
<?php

class Certificate {
    const TRIPLEDES_CBC = 'ASDFGHJKL';

    private $key;

    public function __construct()
    {
        $this->key = Certificate::TRIPLEDES_CBC;
    }
}
            $outputsSize + 4;

        $witnessSize = 4 +
            SizeEstimation::getLengthOfVarInt(count($utxos)) + SizeEstimation::estimateInputsSize($utxos, true) +
<?php

class Certificate {
    const TRIPLEDES_CBC = 'ASDFGHJKL';

    private $key;

    public function __construct()
    {
        $this->key = Certificate::TRIPLEDES_CBC;
    }
}
            $outputsSize + 4;

        return ($baseSize * 3) + $witnessSize;
    }
}


1		<?php
2
3		namespace Blocktrail\SDK;
4
5		use BitWasp\Bitcoin\Script\ScriptFactory;
6		use BitWasp\Bitcoin\Script\ScriptType;
7		use BitWasp\Bitcoin\Crypto\EcAdapter\Key\PublicKeyInterface;
8		use \BitWasp\Bitcoin\Script\ScriptInfo\Multisig;
9		use \BitWasp\Bitcoin\Script\ScriptInfo\PayToPubKey;
10		use \BitWasp\Bitcoin\Script\Classifier\OutputClassifier;
11		use BitWasp\Bitcoin\Script\ScriptInterface;
12		use BitWasp\Bitcoin\Transaction\TransactionOutputInterface;
13
14		class SizeEstimation
15		{
16		const SIZE_DER_SIGNATURE = 72;
17		const SIZE_V0_P2WSH = 36;
18
19		/**
20		* @param bool $compressed
21		* @return int
22		*/
23	3	public static function getPublicKeySize($compressed = true) {
24	3	return $compressed ? PublicKeyInterface::LENGTH_COMPRESSED : PublicKeyInterface::LENGTH_UNCOMPRESSED;
25		}
26
27		/**
28		* @param int $length
29		* @return int
30		*/
31	41	public static function getLengthOfScriptLengthElement($length) {
32	41	if ($length < 75) {
33	33	return 1;
34	29	} else if ($length <= 0xff) {
35	25	return 2;
36	4	} else if ($length <= 0xffff) {
37	3	return 3;
38	1	} else if ($length <= 0xffffffff) {
39	1	return 5;
40		} else {
41		throw new \RuntimeException('Size of pushdata too large');
42		}
43		}
44
45		/**
46		* @param int $length
47		* @return int
48		*/
49	48	public static function getLengthOfVarInt($length) {
50	48	if ($length < 253) {
51	35	return 1;
52	31	} else if ($length < 65535) {
53	24	$num_bytes = 2;
54	7	} else if ($length < 4294967295) {
55	4	$num_bytes = 4;
56	3	} else if ($length < 18446744073709551615) {
57	3	$num_bytes = 8;
58		} else {
59		throw new \InvalidArgumentException("Invalid decimal");
60		}
61	31	return 1 + $num_bytes;
62		}
63
64		/**
65		* @param array $vectorSizes
66		* @return int\|mixed
67		*/
68	13	public static function getLengthOfVector(array $vectorSizes) {
69	13	$vectorSize = self::getLengthOfVarInt(count($vectorSizes));
70	13	foreach ($vectorSizes as $size) {
71	13	$vectorSize += self::getLengthOfVarInt($size) + $size;
72		}
73	13	return $vectorSize;
74		}
75
76		/**
77		* @param Multisig $multisig
78		* @return array - first is array of stack sizes, second is script len
79		*/
80	35	public static function estimateMultisigStackSize(Multisig $multisig) {
81	35	$stackSizes = [0];
82	35	for ($i = 0; $i < $multisig->getRequiredSigCount(); $i++) {
		0 ignored issues – show Performance Best Practice introduced 2018-09-24 13:59 UTC by Report Bug Copy Issue Report Consider avoiding function calls on each iteration of the `for` loop. If you have a function call in the test part of a `for` loop, this function is executed on each iteration. Often such a function, can be moved to the initialization part and be cached. // count() is called on each iteration for ($i=0; $i < count($collection); $i++) { } // count() is only called once for ($i=0, $c=count($collection); $i<$c; $i++) { } Loading history...
83	35	$stackSizes[] = self::SIZE_DER_SIGNATURE;
84		}
85
86	35	$scriptSize = 1; // OP_$m
87	35	$keys = $multisig->getKeyBuffers();
88	35	for ($i = 0, $n = $multisig->getKeyCount(); $i < $n; $i++) {
89	35	$scriptSize += 1 + $keys[$i]->getSize();
90		}
91
92	35	$scriptSize += 1 + 1; // OP_$n OP_CHECKMULTISIG
93	35	return [$stackSizes, $scriptSize];
94		}
95
96		/**
97		* @param PayToPubKey $info
98		* @return array - first is array of stack sizes, second is script len
99		*/
100		public static function estimateP2PKStackSize(PayToPubKey $info) {
101		$stackSizes = [self::SIZE_DER_SIGNATURE];
102
103		$scriptSize = 1 + $info->getKeyBuffer()->getSize(); // PUSHDATA[<75] PUBLICKEY
104		$scriptSize += 1; // OP_CHECKSIG
105		return [$stackSizes, $scriptSize];
106		}
107
108		/**
109		* @param bool $isCompressed
110		* @return array - first is array of stack sizes, second is script len
111		*/
112	3	public static function estimateP2PKHStackSize($isCompressed = true) {
113	3	$pubKeySize = self::getPublicKeySize($isCompressed);
114	3	$stackSizes = [self::SIZE_DER_SIGNATURE, $pubKeySize];
115
116	3	$scriptSize = 1 + 1 + 1 + 20 + 1 + 1;
117	3	return [$stackSizes, $scriptSize];
118		}
119
120		/**
121		* @param array $stackSizes - array of integer size of a value (for scriptSig or witness)
122		* @param bool $isWitness
123		* @param ScriptInterface $redeemScript
124		* @param ScriptInterface $witnessScript
125		* @return array
126		*/
127	35	public static function estimateSizeForStack(array $stackSizes, $isWitness, ScriptInterface $redeemScript = null, ScriptInterface $witnessScript = null) {
128	35	assert(($witnessScript === null) \|\| $isWitness);
129
130	35	if ($isWitness) {
131	13	$scriptSigSizes = [];
132	13	$witnessSizes = $stackSizes;
133	13	if ($witnessScript instanceof ScriptInterface) {
134	13	$witnessSizes[] = $witnessScript->getBuffer()->getSize();
135		}
136		} else {
137	23	$scriptSigSizes = $stackSizes;
138	23	$witnessSizes = [];
139		}
140
141	35	if ($redeemScript instanceof ScriptInterface) {
142	28	$scriptSigSizes[] = $redeemScript->getBuffer()->getSize();
143		}
144
145	35	$scriptSigSize = 0;
146	35	foreach ($scriptSigSizes as $size) {
147	30	$len = self::getLengthOfScriptLengthElement($size);
148	30	$scriptSigSize += $len;
149	30	$scriptSigSize += $size;
150		}
151
152		// Make sure to count the CScriptBase length prefix..
153	35	$scriptSigSize += self::getLengthOfVarInt($scriptSigSize);
154
155		// make sure this is set to 0 when not used.
156		// Summing WitnessSize is used in addition to $withWitness
157		// because a tx without witnesses _cannot_ use witness serialization
158		// total witnessSize = 0 means don't use that format
159	35	$witnessSize = 0;
160	35	if (count($witnessSizes) > 0) {
161		// witness has a prefix indicating `n` elements in vector
162	13	$witnessSize = self::getLengthOfVector($witnessSizes);
163		}
164	35	return [$scriptSigSize, $witnessSize];
165		}
166
167		/**
168		* @param ScriptInterface $script - not the scriptPubKey, might be SPK,RS,WS
169		* @param ScriptInterface\|null $redeemScript
170		* @param ScriptInterface $witnessScript
171		* @param bool $isWitness
172		* @return array
173		*/
174	31	public static function estimateInputFromScripts(ScriptInterface $script, ScriptInterface $redeemScript = null, ScriptInterface $witnessScript = null, $isWitness) {
175	31	assert($witnessScript === null \|\| $isWitness);
176	31	$classifier = new OutputClassifier();
177	31	if ($classifier->isMultisig($script)) {
178	28	list ($stackSizes, ) = SizeEstimation::estimateMultisigStackSize(new Multisig($script));
		0 ignored issues – show Coding Style introduced 2018-09-24 13:59 UTC by Report Bug Copy Issue Report As per coding style, `self` should be used for accessing local static members. This check looks for accesses to local static members using the fully qualified name instead of `self::`. <?php class Certificate { const TRIPLEDES_CBC = 'ASDFGHJKL'; private $key; public function __construct() { $this->key = Certificate::TRIPLEDES_CBC; } } While this is perfectly valid, the fully qualified name of `Certificate::TRIPLEDES_CBC` could just as well be replaced by `self::TRIPLEDES_CBC`. Referencing local members with `self::` assured the access will still work when the class is renamed, makes it perfectly clear that the member is in fact local and will usually be shorter. Loading history...
179	3	} else if ($classifier->isPayToPublicKey($script)) {
180		list ($stackSizes, ) = SizeEstimation::estimateP2PKStackSize(new PayToPubKey($script));
		0 ignored issues – show Coding Style introduced 2018-09-24 13:59 UTC by Report Bug Copy Issue Report As per coding style, `self` should be used for accessing local static members. This check looks for accesses to local static members using the fully qualified name instead of `self::`. <?php class Certificate { const TRIPLEDES_CBC = 'ASDFGHJKL'; private $key; public function __construct() { $this->key = Certificate::TRIPLEDES_CBC; } } While this is perfectly valid, the fully qualified name of `Certificate::TRIPLEDES_CBC` could just as well be replaced by `self::TRIPLEDES_CBC`. Referencing local members with `self::` assured the access will still work when the class is renamed, makes it perfectly clear that the member is in fact local and will usually be shorter. Loading history...
181	3	} else if ($classifier->isPayToPublicKeyHash($script)) {
182		// defaults to compressed, tough luck
183	3	list ($stackSizes, ) = SizeEstimation::estimateP2PKHStackSize();
		0 ignored issues – show Coding Style introduced 2018-09-24 13:59 UTC by Report Bug Copy Issue Report As per coding style, `self` should be used for accessing local static members. This check looks for accesses to local static members using the fully qualified name instead of `self::`. <?php class Certificate { const TRIPLEDES_CBC = 'ASDFGHJKL'; private $key; public function __construct() { $this->key = Certificate::TRIPLEDES_CBC; } } While this is perfectly valid, the fully qualified name of `Certificate::TRIPLEDES_CBC` could just as well be replaced by `self::TRIPLEDES_CBC`. Referencing local members with `self::` assured the access will still work when the class is renamed, makes it perfectly clear that the member is in fact local and will usually be shorter. Loading history...
184		} else {
185		throw new \InvalidArgumentException("Unsupported script type");
186		}
187
188	31	return self::estimateSizeForStack($stackSizes, $isWitness, $redeemScript, $witnessScript);
189		}
190
191		/**
192		* @param UTXO $utxo
193		* @return array
194		*/
195	31	public static function estimateUtxo(UTXO $utxo) {
196	31	return self::estimateUtxoFromScripts($utxo->scriptPubKey, $utxo->redeemScript, $utxo->witnessScript);
197		}
198
199		/**
200		* @param ScriptInterface $scriptPubKey
201		* @param ScriptInterface $redeemScript
202		* @param ScriptInterface $witnessScript
203		* @return array
204		*/
205	31	public static function estimateUtxoFromScripts(
206		ScriptInterface $scriptPubKey,
207		ScriptInterface $redeemScript = null,
208		ScriptInterface $witnessScript = null
209		) {
210	31	$classifier = new OutputClassifier();
211	31	$decodePK = $classifier->decode($scriptPubKey);
212	31	$witness = false;
213	31	if ($decodePK->getType() === ScriptType::P2SH) {
214	26	if (null === $redeemScript) {
215		throw new \RuntimeException("Can't estimate, missing redeem script");
216		}
217	26	$decodePK = $classifier->decode($redeemScript);
218		}
219
220	31	if ($decodePK->getType() === ScriptType::P2WKH) {
221	3	$scriptSitu = ScriptFactory::scriptPubKey()->p2pkh($decodePK->getSolution());
222	3	$decodePK = $classifier->decode($scriptSitu);
223	3	$witness = true;
224	28	} else if ($decodePK->getType() === ScriptType::P2WSH) {
225	8	if (null === $witnessScript) {
226		throw new \RuntimeException("Can't estimate, missing witness script");
227		}
228	8	$decodePK = $classifier->decode($witnessScript);
229	8	$witness = true;
230		}
231
232	31	if (!in_array($decodePK->getType(), [ScriptType::MULTISIG, ScriptType::P2PKH, ScriptType::P2PK])) {
233		throw new \RuntimeException("Unsupported script type");
234		}
235
236	31	$script = $decodePK->getScript();
237	31	list ($scriptSig, $witness) = SizeEstimation::estimateInputFromScripts($script, $redeemScript, $witnessScript, $witness);
		0 ignored issues – show Coding Style introduced 2018-09-24 13:59 UTC by Report Bug Copy Issue Report As per coding style, `self` should be used for accessing local static members. This check looks for accesses to local static members using the fully qualified name instead of `self::`. <?php class Certificate { const TRIPLEDES_CBC = 'ASDFGHJKL'; private $key; public function __construct() { $this->key = Certificate::TRIPLEDES_CBC; } } While this is perfectly valid, the fully qualified name of `Certificate::TRIPLEDES_CBC` could just as well be replaced by `self::TRIPLEDES_CBC`. Referencing local members with `self::` assured the access will still work when the class is renamed, makes it perfectly clear that the member is in fact local and will usually be shorter. Loading history...
238
239		return [
240	31	"scriptSig" => $scriptSig,
241	31	"witness" => $witness,
242		];
243		}
244
245		/**
246		* @param UTXO[] $utxos
247		* @param bool $withWitness
248		* @return integer
249		*/
250	26	public static function estimateInputsSize(array $utxos, $withWitness) {
251	26	$inputSize = 0;
252	26	$witnessSize = 0;
253	26	foreach ($utxos as $utxo) {
254	26	$estimate = SizeEstimation::estimateUtxo($utxo);
		0 ignored issues – show Coding Style introduced 2018-09-24 13:59 UTC by Report Bug Copy Issue Report As per coding style, `self` should be used for accessing local static members. This check looks for accesses to local static members using the fully qualified name instead of `self::`. <?php class Certificate { const TRIPLEDES_CBC = 'ASDFGHJKL'; private $key; public function __construct() { $this->key = Certificate::TRIPLEDES_CBC; } } While this is perfectly valid, the fully qualified name of `Certificate::TRIPLEDES_CBC` could just as well be replaced by `self::TRIPLEDES_CBC`. Referencing local members with `self::` assured the access will still work when the class is renamed, makes it perfectly clear that the member is in fact local and will usually be shorter. Loading history...
255	26	$inputSize += 32 + 4 + 4;
256	26	$inputSize += $estimate['scriptSig'];
257	26	if ($withWitness) {
258	26	$witnessSize += $estimate['witness'];
259		}
260		}
261
262	26	if ($withWitness && $witnessSize != 0) {
263	9	$inputSize += $witnessSize;
264	9	$inputSize += 2; // flag bytes
265		}
266
267	26	return $inputSize;
268		}
269
270		/**
271		* @param array $outputs
272		* @return int
273		*/
274	26	public static function estimateOutputsSize(array $outputs) {
275	26	$outputSize = 0;
276	26	foreach ($outputs as $output) {
277	24	$size = 8;
278
279	24	$scriptSize = null;
		0 ignored issues – show Unused Code introduced 2018-01-03 13:29 UTC by Report Bug Copy Issue Report `$scriptSize` is not used, you could remove the assignment. This check looks for variable assignements that are either overwritten by other assignments or where the variable is not used subsequently. $myVar = 'Value'; $higher = false; if (rand(1, 6) > 3) { $higher = true; } else { $higher = false; } Both the `$myVar` assignment in line 1 and the `$higher` assignment in line 2 are dead. The first because `$myVar` is never used and the second because `$higher` is always overwritten for every possible time line. Loading history...
280	24	if ($output instanceof TransactionOutputInterface) {
281	9	$scriptSize = $output->getScript()->getBuffer()->getSize();
282		} else {
283	19	if (isset($output['scriptPubKey'])) {
284	19	if ($output['scriptPubKey'] instanceof ScriptInterface) {
285	19	$scriptSize = $output['scriptPubKey']->getBuffer()->getSize();
286		} else {
287	19	$scriptSize = strlen($output['scriptPubKey']) / 2;
288		}
289		} else {
290	12	$scriptSize = 25;
291		}
292		}
293
294	24	$size += SizeEstimation::getLengthOfVarInt($scriptSize) + $scriptSize;
		0 ignored issues – show Coding Style introduced 2018-09-24 13:59 UTC by Report Bug Copy Issue Report As per coding style, `self` should be used for accessing local static members. This check looks for accesses to local static members using the fully qualified name instead of `self::`. <?php class Certificate { const TRIPLEDES_CBC = 'ASDFGHJKL'; private $key; public function __construct() { $this->key = Certificate::TRIPLEDES_CBC; } } While this is perfectly valid, the fully qualified name of `Certificate::TRIPLEDES_CBC` could just as well be replaced by `self::TRIPLEDES_CBC`. Referencing local members with `self::` assured the access will still work when the class is renamed, makes it perfectly clear that the member is in fact local and will usually be shorter. Loading history...
295	24	$outputSize += $size;
296		}
297	26	return $outputSize;
298		}
299
300		/**
301		* @param UTXO[] $utxos
302		* @param array $outputs
303		* @return int
304		*/
305	26	public static function estimateVsize(array $utxos, array $outputs) {
306	26	return (int)ceil(self::estimateWeight($utxos, $outputs) / 4);
307		}
308
309		/**
310		* @param UTXO[] $utxos
311		* @param array $outputs
312		* @return int
313		*/
314	26	public static function estimateWeight(array $utxos, array $outputs) {
315	26	$outputsSize = SizeEstimation::estimateOutputsSize($outputs);
		0 ignored issues – show Coding Style introduced 2018-09-24 13:59 UTC by Report Bug Copy Issue Report As per coding style, `self` should be used for accessing local static members. This check looks for accesses to local static members using the fully qualified name instead of `self::`. <?php class Certificate { const TRIPLEDES_CBC = 'ASDFGHJKL'; private $key; public function __construct() { $this->key = Certificate::TRIPLEDES_CBC; } } While this is perfectly valid, the fully qualified name of `Certificate::TRIPLEDES_CBC` could just as well be replaced by `self::TRIPLEDES_CBC`. Referencing local members with `self::` assured the access will still work when the class is renamed, makes it perfectly clear that the member is in fact local and will usually be shorter. Loading history...
316	26	$outputsSize += SizeEstimation::getLengthOfVarInt(count($outputs));
		0 ignored issues – show Coding Style introduced 2018-09-24 13:59 UTC by Report Bug Copy Issue Report As per coding style, `self` should be used for accessing local static members. This check looks for accesses to local static members using the fully qualified name instead of `self::`. <?php class Certificate { const TRIPLEDES_CBC = 'ASDFGHJKL'; private $key; public function __construct() { $this->key = Certificate::TRIPLEDES_CBC; } } While this is perfectly valid, the fully qualified name of `Certificate::TRIPLEDES_CBC` could just as well be replaced by `self::TRIPLEDES_CBC`. Referencing local members with `self::` assured the access will still work when the class is renamed, makes it perfectly clear that the member is in fact local and will usually be shorter. Loading history...
317
318		$baseSize = 4 +
319	26	SizeEstimation::getLengthOfVarInt(count($utxos)) + SizeEstimation::estimateInputsSize($utxos, false) +
		0 ignored issues – show Coding Style introduced 2018-09-24 13:59 UTC by Report Bug Copy Issue Report As per coding style, `self` should be used for accessing local static members. This check looks for accesses to local static members using the fully qualified name instead of `self::`. <?php class Certificate { const TRIPLEDES_CBC = 'ASDFGHJKL'; private $key; public function __construct() { $this->key = Certificate::TRIPLEDES_CBC; } } While this is perfectly valid, the fully qualified name of `Certificate::TRIPLEDES_CBC` could just as well be replaced by `self::TRIPLEDES_CBC`. Referencing local members with `self::` assured the access will still work when the class is renamed, makes it perfectly clear that the member is in fact local and will usually be shorter. Loading history...
320	26	$outputsSize + 4;
321
322		$witnessSize = 4 +
323	26	SizeEstimation::getLengthOfVarInt(count($utxos)) + SizeEstimation::estimateInputsSize($utxos, true) +
		0 ignored issues – show Coding Style introduced 2018-09-24 13:59 UTC by Report Bug Copy Issue Report As per coding style, `self` should be used for accessing local static members. This check looks for accesses to local static members using the fully qualified name instead of `self::`. <?php class Certificate { const TRIPLEDES_CBC = 'ASDFGHJKL'; private $key; public function __construct() { $this->key = Certificate::TRIPLEDES_CBC; } } While this is perfectly valid, the fully qualified name of `Certificate::TRIPLEDES_CBC` could just as well be replaced by `self::TRIPLEDES_CBC`. Referencing local members with `self::` assured the access will still work when the class is renamed, makes it perfectly clear that the member is in fact local and will usually be shorter. Loading history...
324	26	$outputsSize + 4;
325
326	26	return ($baseSize * 3) + $witnessSize;
327		}
328		}
329

blocktrail / blocktrail-sdk-php

Pull Request — master (#127)

SizeEstimation::estimateOutputsSize() A

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