Peer::version() - Code Metrics - Inspection of "Merge pull request #58 from afk11/peer-tests" - Bit-Wasp/bitcoin-p2p-php - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( d2dd08...01649b )

by thomas

created 2016-03-24 01:56 UTC

Peer::version() A

↳ Parent: Peer

Complexity

Conditions	1
Paths	1

Size

Total Lines	21
Code Lines	18

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	0
CRAP Score	2

Importance

Changes	2
Bugs	0	Features	0

Metric	Value
c	2
b	0
f	0
dl	0
loc	21
ccs	0
cts	11
cp	0
rs	9.3142
cc	1
eloc	18
nc	1
nop	8
crap	2

How to fix Many Parameters

<?php

namespace BitWasp\Bitcoin\Networking\Peer;

use BitWasp\Bitcoin\Block\BlockInterface;
use BitWasp\Bitcoin\Block\FilteredBlock;
use BitWasp\Bitcoin\Bloom\BloomFilter;
use BitWasp\Bitcoin\Chain\BlockLocator;
use BitWasp\Bitcoin\Networking\Message;
use BitWasp\Bitcoin\Networking\Messages\Version;
use BitWasp\Bitcoin\Networking\Messages\Ping;
use BitWasp\Bitcoin\Networking\NetworkMessage;
use BitWasp\Bitcoin\Networking\NetworkSerializable;
use BitWasp\Bitcoin\Networking\Structure\AlertDetail;
use BitWasp\Bitcoin\Networking\Structure\Inventory;
use BitWasp\Bitcoin\Networking\Structure\NetworkAddress;
use BitWasp\Bitcoin\Networking\Structure\NetworkAddressInterface;
use BitWasp\Bitcoin\Networking\Structure\NetworkAddressTimestamp;
use BitWasp\Bitcoin\Crypto\EcAdapter\Signature\SignatureInterface;
use BitWasp\Bitcoin\Transaction\TransactionInterface;
use BitWasp\Buffertools\Buffer;
use BitWasp\Buffertools\BufferInterface;
use BitWasp\Buffertools\Parser;
use Evenement\EventEmitter;
use React\EventLoop\LoopInterface;
use React\Promise\Deferred;
use React\Stream\Stream;

class Peer extends EventEmitter
{
    /**
     * @var string
     */
    private $buffer = '';

    /**
     * @var LoopInterface
     */
    private $loop;

    /**
     * @var \BitWasp\Bitcoin\Networking\Messages\Factory
     */
    private $msgs;

    /**
     * @var Stream
     */
    private $stream;

    /**
     * @var Version
     */
    private $localVersion;

    /**
     * @var Version
     */
    private $remoteVersion;

    /**
     * @var NetworkAddressInterface
     */
    private $peerAddress;

    /**
     * @var ConnectionParams
     */
    private $connectionParams;

    /**
     * @var bool
     */
    private $exchangedVersion = false;

    /**
     * @param \BitWasp\Bitcoin\Networking\Messages\Factory $msgs
     * @param LoopInterface $loop
     */
    public function __construct(\BitWasp\Bitcoin\Networking\Messages\Factory $msgs, LoopInterface $loop)
    {
        $this->msgs = $msgs;
        $this->loop = $loop;
    }

    /**
     * @return Version
     */
    public function getLocalVersion()
    {
        return $this->localVersion;
    }

    /**
     * @return Version
     */
    public function getRemoteVersion()
    {
        return $this->remoteVersion;
    }

    /**
     * Reliably returns the remote peers NetAddr when known through
     * the connection process. Often better than the data contained
     * in a Version message.
     *
     * @return NetworkAddressInterface
     */
    public function getRemoteAddress()
    {
        return $this->peerAddress;
    }

    /**
     * @return ConnectionParams
     */
    public function getConnectionParams()
    {
        return $this->connectionParams;
    }

    /**
     * @param NetworkSerializable $msg
     */
    public function send(NetworkSerializable $msg)
    {
        $net = $msg->getNetworkMessage();
        $this->stream->write($net->getBinary());
        $this->emit('send', [$net]);
    }

    /**
     * Handler for incoming data. Buffers possibly fragmented packets since they arrive sequentially.
     * Before finishing the version exchange, this will only emit Version and VerAck messages.
     */
    private function onData()
    {
        $tmp = $this->buffer;
        $parser = new Parser(new Buffer($tmp));

        try {
            while ($message = $this->msgs->parse($parser)) {
                $tmp = $parser->getBuffer()->slice($parser->getPosition())->getBinary();
                $this->emit('msg', [$this, $message]);
            }
        } catch (\Exception $e) {
            $this->buffer = $tmp;
            // Do nothing - it was probably a fragmented message
        }
    }

    /**
     * @param Stream $stream
     * @return $this
     */
    public function setupStream(Stream $stream)
    {
        $this->stream = $stream;
        $this->stream->on('data', function ($data) {
            $this->buffer .= $data;
            $this->emit('data');
        });

        $this->stream->on('close', function () {
            $this->close();
        });

        $this->on('data', function () {
            $this->onData();
        });

        $this->on('msg', function (Peer $peer, NetworkMessage $msg) {
            $this->emit($msg->getCommand(), [$peer, $msg->getPayload()]);
        });

        return $this;
    }

    /**
     * @param Stream $connection
     * @param ConnectionParams $params
     * @return \React\Promise\Promise|\React\Promise\PromiseInterface
     */
    public function inboundHandshake(Stream $connection, ConnectionParams $params)
    {
        $this->setupStream($connection);
        $this->connectionParams = $params;

        $deferred = new Deferred();
        $this->on(Message::VERSION, function (Peer $peer, Version $version) use ($params) {
            $split = explode(":", stream_socket_get_name($this->stream->stream, true));
            if (count($split) === 2) {
                list ($ip, $port) = $split;
                $this->peerAddress = new NetworkAddress($version->getServices(), $ip, $port);
            } else {
                $this->peerAddress = $version->getSenderAddress();
            }

            $this->remoteVersion = $version;
            $this->localVersion = $localVersion = $params->produceVersion($this->msgs, $version->getSenderAddress());
            $this->send($localVersion);
        });

        $this->on(Message::VERACK, function () use ($deferred) {
            if (false === $this->exchangedVersion) {
                $this->exchangedVersion = true;
                $this->verack();
                $this->emit('ready', [$this]);
                $deferred->resolve($this);
            }
        });


        return $deferred->promise();
    }

    /**
     * @param NetworkAddressInterface $remotePeer
     * @param ConnectionParams $params
     * @return \React\Promise\Promise|\React\Promise\PromiseInterface
     */
    public function outboundHandshake(NetworkAddressInterface $remotePeer, ConnectionParams $params)
    {
        $deferred = new Deferred();

        $this->on(Message::VERSION, function (Peer $peer, Version $version) {
            $this->remoteVersion = $version;
            $this->verack();
        });

        $this->on(Message::VERACK, function () use ($deferred) {
            if (false === $this->exchangedVersion) {
                $this->exchangedVersion = true;
                $this->emit('ready', [$this]);
                $deferred->resolve($this);
            }
        });

        $this->peerAddress = $remotePeer;
        $this->localVersion = $version = $params->produceVersion($this->msgs, $remotePeer);
        $this->connectionParams = $params;

        $this->send($version);

        return $deferred->promise();
    }

    /**
     *
     */
    public function intentionalClose()
    {
        $this->emit('intentionaldisconnect', [$this]);
        $this->close();
    }

    /**
     *
     */
    public function close()
    {
        $this->emit('close', [$this]);
        $this->stream->end();
        $this->removeAllListeners();
    }

    /**
     * @param int $protocolVersion
     * @param int $services
     * @param int $timestamp
     * @param NetworkAddressInterface $remoteAddr
     * @param NetworkAddressInterface $localAddr
     * @param string $userAgent
     * @param int $blockHeight
     * @param bool $relayToUs
     */
    public function version(
        $protocolVersion,
        $services,
        $timestamp,
        NetworkAddressInterface $remoteAddr,
        NetworkAddressInterface $localAddr,
        $userAgent,
        $blockHeight,
        $relayToUs
    ) {
        $this->send($this->msgs->version(
            $protocolVersion,
            $services,
            $timestamp,
            $remoteAddr,
            $localAddr,
            new Buffer($userAgent),
            $blockHeight,
            $relayToUs
        ));
    }

    /**
     *
     */
    public function verack()
    {
        $this->send($this->msgs->verack());
    }

    /**
     *
     */
    public function sendheaders()
    {
        $this->send($this->msgs->sendheaders());
    }

    /**
     * @param Inventory[] $vInv
     */
    public function inv(array $vInv)
    {
        $this->send($this->msgs->inv($vInv));
    }

    /**
     * @param Inventory[] $vInv
     */
    public function getdata(array $vInv)
    {
        $this->send($this->msgs->getdata($vInv));
    }

    /**
     * @param array $vInv
     */
    public function notfound(array $vInv)
    {
        $this->send($this->msgs->notfound($vInv));
    }

    /**
     * @param NetworkAddressTimestamp[] $vNetAddr
     */
    public function addr(array $vNetAddr)
    {
        $this->send($this->msgs->addr($vNetAddr));
    }

    /**
     *
     */
    public function getaddr()
    {
        $this->send($this->msgs->getaddr());
    }

    /**
     *
     */
    public function ping()
    {
        $this->send($this->msgs->ping());
    }

    /**
     * @param Ping $ping
     */
    public function pong(Ping $ping)
    {
        $this->send($this->msgs->pong($ping));
    }

    /**
     * @param TransactionInterface $tx
     */
    public function tx(TransactionInterface $tx)
    {
        $this->send($this->msgs->tx($tx));
    }

    /**
     * @param BlockLocator $locator
     */
    public function getblocks(BlockLocator $locator)
    {
        $this->send($this->msgs->getblocks(
            $this->localVersion->getVersion(),
            $locator
        ));
    }

    /**
     * @param BlockLocator $locator
     */
    public function getheaders(BlockLocator $locator)
    {
        $this->send($this->msgs->getheaders(
            $this->localVersion->getVersion(),
            $locator
        ));
    }

    /**
     * @param BlockInterface $block
     */
    public function block(BlockInterface $block)
    {
        $this->send($this->msgs->block($block));
    }

    /**
     * @param array $vHeaders
     */
    public function headers(array $vHeaders)
    {
        $this->send($this->msgs->headers($vHeaders));
    }

    /**
     * @param AlertDetail $detail
     * @param SignatureInterface $signature
     */
    public function alert(AlertDetail $detail, SignatureInterface $signature)
    {
        $this->send($this->msgs->alert($detail, $signature));
    }

    /**
     * @param int $feeRate
     */
    public function feefilter($feeRate)
    {
        $this->send($this->msgs->feefilter($feeRate));
    }

    /**
     * @param BufferInterface $data
     */
    public function filteradd(BufferInterface $data)
    {
        $this->send($this->msgs->filteradd($data));
    }

    /**
     * @param BloomFilter $filter
     */
    public function filterload(BloomFilter $filter)
    {
        $this->send($this->msgs->filterload($filter));
    }

    /**
     *
     */
    public function filterclear()
    {
        $this->send($this->msgs->filterclear());
    }

    /**
     * @param FilteredBlock $filtered
     */
    public function merkleblock(FilteredBlock $filtered)
    {
        $this->send($this->msgs->merkleblock($filtered));
    }

    /**
     *
     */
    public function mempool()
    {
        $this->send($this->msgs->mempool());
    }

    /**
     * Issue a Reject message, with a required $msg, $code, and $reason
     *
     * @param BufferInterface $msg
     * @param int $code
     * @param BufferInterface $reason
     * @param BufferInterface $data
     */
    public function reject(BufferInterface $msg, $code, BufferInterface $reason, BufferInterface $data = null)
    {
        $this->send($this->msgs->reject($msg, $code, $reason, $data));
    }
}


1		<?php
2
3		namespace BitWasp\Bitcoin\Networking\Peer;
4
5		use BitWasp\Bitcoin\Block\BlockInterface;
6		use BitWasp\Bitcoin\Block\FilteredBlock;
7		use BitWasp\Bitcoin\Bloom\BloomFilter;
8		use BitWasp\Bitcoin\Chain\BlockLocator;
9		use BitWasp\Bitcoin\Networking\Message;
10		use BitWasp\Bitcoin\Networking\Messages\Version;
11		use BitWasp\Bitcoin\Networking\Messages\Ping;
12		use BitWasp\Bitcoin\Networking\NetworkMessage;
13		use BitWasp\Bitcoin\Networking\NetworkSerializable;
14		use BitWasp\Bitcoin\Networking\Structure\AlertDetail;
15		use BitWasp\Bitcoin\Networking\Structure\Inventory;
16		use BitWasp\Bitcoin\Networking\Structure\NetworkAddress;
17		use BitWasp\Bitcoin\Networking\Structure\NetworkAddressInterface;
18		use BitWasp\Bitcoin\Networking\Structure\NetworkAddressTimestamp;
19		use BitWasp\Bitcoin\Crypto\EcAdapter\Signature\SignatureInterface;
20		use BitWasp\Bitcoin\Transaction\TransactionInterface;
21		use BitWasp\Buffertools\Buffer;
22		use BitWasp\Buffertools\BufferInterface;
23		use BitWasp\Buffertools\Parser;
24		use Evenement\EventEmitter;
25		use React\EventLoop\LoopInterface;
26		use React\Promise\Deferred;
27		use React\Stream\Stream;
28
29		class Peer extends EventEmitter
30		{
31		/**
32		* @var string
33		*/
34		private $buffer = '';
35
36		/**
37		* @var LoopInterface
38		*/
39		private $loop;
40
41		/**
42		* @var \BitWasp\Bitcoin\Networking\Messages\Factory
43		*/
44		private $msgs;
45
46		/**
47		* @var Stream
48		*/
49		private $stream;
50
51		/**
52		* @var Version
53		*/
54		private $localVersion;
55
56		/**
57		* @var Version
58		*/
59		private $remoteVersion;
60
61		/**
62		* @var NetworkAddressInterface
63		*/
64		private $peerAddress;
65
66		/**
67		* @var ConnectionParams
68		*/
69		private $connectionParams;
70
71		/**
72		* @var bool
73		*/
74		private $exchangedVersion = false;
75
76		/**
77		* @param \BitWasp\Bitcoin\Networking\Messages\Factory $msgs
78		* @param LoopInterface $loop
79		*/
80	12	public function __construct(\BitWasp\Bitcoin\Networking\Messages\Factory $msgs, LoopInterface $loop)
81		{
82	12	$this->msgs = $msgs;
83	12	$this->loop = $loop;
84	12	}
85
86		/**
87		* @return Version
88		*/
89	3	public function getLocalVersion()
90		{
91	3	return $this->localVersion;
92		}
93
94		/**
95		* @return Version
96		*/
97	3	public function getRemoteVersion()
98		{
99	3	return $this->remoteVersion;
100		}
101
102		/**
103		* Reliably returns the remote peers NetAddr when known through
104		* the connection process. Often better than the data contained
105		* in a Version message.
106		*
107		* @return NetworkAddressInterface
108		*/
109	3	public function getRemoteAddress()
110		{
111	3	return $this->peerAddress;
112		}
113
114		/**
115		* @return ConnectionParams
116		*/
117	3	public function getConnectionParams()
118		{
119	3	return $this->connectionParams;
120		}
121
122		/**
123		* @param NetworkSerializable $msg
124		*/
125	12	public function send(NetworkSerializable $msg)
126		{
127	12	$net = $msg->getNetworkMessage();
128	12	$this->stream->write($net->getBinary());
129	12	$this->emit('send', [$net]);
130	12	}
131
132		/**
133		* Handler for incoming data. Buffers possibly fragmented packets since they arrive sequentially.
134		* Before finishing the version exchange, this will only emit Version and VerAck messages.
135		*/
136	12	private function onData()
137		{
138	12	$tmp = $this->buffer;
139	12	$parser = new Parser(new Buffer($tmp));
140
141		try {
142	12	while ($message = $this->msgs->parse($parser)) {
143	12	$tmp = $parser->getBuffer()->slice($parser->getPosition())->getBinary();
144	12	$this->emit('msg', [$this, $message]);
145	12	}
146	12	} catch (\Exception $e) {
147	12	$this->buffer = $tmp;
148		// Do nothing - it was probably a fragmented message
149		}
150	12	}
151
152		/**
153		* @param Stream $stream
154		* @return $this
155		*/
156	12	public function setupStream(Stream $stream)
157		{
158	12	$this->stream = $stream;
159		$this->stream->on('data', function ($data) {
160	12	$this->buffer .= $data;
161	12	$this->emit('data');
162	12	});
163
164		$this->stream->on('close', function () {
165	9	$this->close();
166	12	});
167
168		$this->on('data', function () {
169	12	$this->onData();
170	12	});
171
172		$this->on('msg', function (Peer $peer, NetworkMessage $msg) {
173	12	$this->emit($msg->getCommand(), [$peer, $msg->getPayload()]);
174	12	});
175
176	12	return $this;
177		}
178
179		/**
180		* @param Stream $connection
181		* @param ConnectionParams $params
182		* @return \React\Promise\Promise\|\React\Promise\PromiseInterface
183		*/
184	9	public function inboundHandshake(Stream $connection, ConnectionParams $params)
185		{
186	9	$this->setupStream($connection);
187	9	$this->connectionParams = $params;
188
189	9	$deferred = new Deferred();
190		$this->on(Message::VERSION, function (Peer $peer, Version $version) use ($params) {
191	9	$split = explode(":", stream_socket_get_name($this->stream->stream, true));
192	9	if (count($split) === 2) {
193	9	list ($ip, $port) = $split;
194	9	$this->peerAddress = new NetworkAddress($version->getServices(), $ip, $port);
195	9	} else {
196		$this->peerAddress = $version->getSenderAddress();
197		}
198
199	9	$this->remoteVersion = $version;
200	9	$this->localVersion = $localVersion = $params->produceVersion($this->msgs, $version->getSenderAddress());
201	9	$this->send($localVersion);
202	9	});
203
204		$this->on(Message::VERACK, function () use ($deferred) {
205	9	if (false === $this->exchangedVersion) {
206	9	$this->exchangedVersion = true;
207	9	$this->verack();
208	9	$this->emit('ready', [$this]);
209	9	$deferred->resolve($this);
210	9	}
211	9	});
212
213
214	9	return $deferred->promise();
215		}
216
217		/**
218		* @param NetworkAddressInterface $remotePeer
219		* @param ConnectionParams $params
220		* @return \React\Promise\Promise\|\React\Promise\PromiseInterface
221		*/
222	12	public function outboundHandshake(NetworkAddressInterface $remotePeer, ConnectionParams $params)
223		{
224	12	$deferred = new Deferred();
225
226		$this->on(Message::VERSION, function (Peer $peer, Version $version) {
227	12	$this->remoteVersion = $version;
228	12	$this->verack();
229	12	});
230
231	12	$this->on(Message::VERACK, function () use ($deferred) {
232	9	if (false === $this->exchangedVersion) {
233	9	$this->exchangedVersion = true;
234	9	$this->emit('ready', [$this]);
235	9	$deferred->resolve($this);
236	9	}
237	12	});
238
239	12	$this->peerAddress = $remotePeer;
240	12	$this->localVersion = $version = $params->produceVersion($this->msgs, $remotePeer);
241	12	$this->connectionParams = $params;
242
243	12	$this->send($version);
244
245	12	return $deferred->promise();
246		}
247
248		/**
249		*
250		*/
251		public function intentionalClose()
252		{
253		$this->emit('intentionaldisconnect', [$this]);
254		$this->close();
255		}
256
257		/**
258		*
259		*/
260	9	public function close()
261		{
262	9	$this->emit('close', [$this]);
263	9	$this->stream->end();
264	9	$this->removeAllListeners();
265	9	}
266
267		/**
268		* @param int $protocolVersion
269		* @param int $services
270		* @param int $timestamp
271		* @param NetworkAddressInterface $remoteAddr
272		* @param NetworkAddressInterface $localAddr
273		* @param string $userAgent
274		* @param int $blockHeight
275		* @param bool $relayToUs
276		*/
277		public function version(
278		$protocolVersion,
279		$services,
280		$timestamp,
281		NetworkAddressInterface $remoteAddr,
282		NetworkAddressInterface $localAddr,
283		$userAgent,
284		$blockHeight,
285		$relayToUs
286		) {
287		$this->send($this->msgs->version(
288		$protocolVersion,
289		$services,
290		$timestamp,
291		$remoteAddr,
292		$localAddr,
293		new Buffer($userAgent),
294		$blockHeight,
295		$relayToUs
296		));
297		}
298
299		/**
300		*
301		*/
302	12	public function verack()
303		{
304	12	$this->send($this->msgs->verack());
305	12	}
306
307		/**
308		*
309		*/
310		public function sendheaders()
311		{
312		$this->send($this->msgs->sendheaders());
313		}
314
315		/**
316		* @param Inventory[] $vInv
317		*/
318		public function inv(array $vInv)
319		{
320		$this->send($this->msgs->inv($vInv));
321		}
322
323		/**
324		* @param Inventory[] $vInv
325		*/
326		public function getdata(array $vInv)
327		{
328		$this->send($this->msgs->getdata($vInv));
329		}
330
331		/**
332		* @param array $vInv
333		*/
334		public function notfound(array $vInv)
335		{
336		$this->send($this->msgs->notfound($vInv));
337		}
338
339		/**
340		* @param NetworkAddressTimestamp[] $vNetAddr
341		*/
342		public function addr(array $vNetAddr)
343		{
344		$this->send($this->msgs->addr($vNetAddr));
345		}
346
347		/**
348		*
349		*/
350		public function getaddr()
351		{
352		$this->send($this->msgs->getaddr());
353		}
354
355		/**
356		*
357		*/
358		public function ping()
359		{
360		$this->send($this->msgs->ping());
361		}
362
363		/**
364		* @param Ping $ping
365		*/
366		public function pong(Ping $ping)
367		{
368		$this->send($this->msgs->pong($ping));
369		}
370
371		/**
372		* @param TransactionInterface $tx
373		*/
374		public function tx(TransactionInterface $tx)
375		{
376		$this->send($this->msgs->tx($tx));
377		}
378
379		/**
380		* @param BlockLocator $locator
381		*/
382		public function getblocks(BlockLocator $locator)
383		{
384		$this->send($this->msgs->getblocks(
385		$this->localVersion->getVersion(),
386		$locator
387		));
388		}
389
390		/**
391		* @param BlockLocator $locator
392		*/
393		public function getheaders(BlockLocator $locator)
394		{
395		$this->send($this->msgs->getheaders(
396		$this->localVersion->getVersion(),
397		$locator
398		));
399		}
400
401		/**
402		* @param BlockInterface $block
403		*/
404		public function block(BlockInterface $block)
405		{
406		$this->send($this->msgs->block($block));
407		}
408
409		/**
410		* @param array $vHeaders
411		*/
412		public function headers(array $vHeaders)
413		{
414		$this->send($this->msgs->headers($vHeaders));
415		}
416
417		/**
418		* @param AlertDetail $detail
419		* @param SignatureInterface $signature
420		*/
421		public function alert(AlertDetail $detail, SignatureInterface $signature)
422		{
423		$this->send($this->msgs->alert($detail, $signature));
424		}
425
426		/**
427		* @param int $feeRate
428		*/
429		public function feefilter($feeRate)
430		{
431		$this->send($this->msgs->feefilter($feeRate));
432		}
433
434		/**
435		* @param BufferInterface $data
436		*/
437		public function filteradd(BufferInterface $data)
438		{
439		$this->send($this->msgs->filteradd($data));
440		}
441
442		/**
443		* @param BloomFilter $filter
444		*/
445		public function filterload(BloomFilter $filter)
446		{
447		$this->send($this->msgs->filterload($filter));
448		}
449
450		/**
451		*
452		*/
453		public function filterclear()
454		{
455		$this->send($this->msgs->filterclear());
456		}
457
458		/**
459		* @param FilteredBlock $filtered
460		*/
461		public function merkleblock(FilteredBlock $filtered)
462		{
463		$this->send($this->msgs->merkleblock($filtered));
464		}
465
466		/**
467		*
468		*/
469		public function mempool()
470		{
471		$this->send($this->msgs->mempool());
472		}
473
474		/**
475		* Issue a Reject message, with a required $msg, $code, and $reason
476		*
477		* @param BufferInterface $msg
478		* @param int $code
479		* @param BufferInterface $reason
480		* @param BufferInterface $data
481		*/
482		public function reject(BufferInterface $msg, $code, BufferInterface $reason, BufferInterface $data = null)
483		{
484		$this->send($this->msgs->reject($msg, $code, $reason, $data));
485		}
486		}
487

Bit-Wasp / bitcoin-p2p-php

Push — master ( d2dd08...01649b )

Peer::version() A

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Many Parameters

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