|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace BitWasp\Bitcoin\Serializer\Bloom; |
|
4
|
|
|
|
|
5
|
|
|
use BitWasp\Bitcoin\Bitcoin; |
|
6
|
|
|
use BitWasp\Bitcoin\Bloom\BloomFilter; |
|
7
|
|
|
use BitWasp\Bitcoin\Serializer\Types; |
|
8
|
|
|
use BitWasp\Buffertools\BufferInterface; |
|
9
|
|
|
use BitWasp\Buffertools\Buffertools; |
|
10
|
|
|
use BitWasp\Buffertools\Parser; |
|
11
|
|
|
use BitWasp\Buffertools\Template; |
|
12
|
|
|
|
|
13
|
|
|
class BloomFilterSerializer |
|
14
|
|
|
{ |
|
15
|
|
|
/** |
|
16
|
|
|
* @var Template |
|
17
|
|
|
*/ |
|
18
|
48 |
|
private $template; |
|
19
|
|
|
|
|
20
|
48 |
|
public function __construct() |
|
21
|
48 |
|
{ |
|
22
|
36 |
|
$this->uint32le = Types::uint32le(); |
|
|
|
|
|
|
23
|
48 |
|
$this->uint8le = Types::uint8le(); |
|
|
|
|
|
|
24
|
48 |
|
$this->template = new Template([ |
|
25
|
48 |
|
Types::vector(function (Parser $parser) { |
|
26
|
48 |
|
return $parser->readBytes(1)->getInt(); |
|
27
|
48 |
|
}), |
|
28
|
|
|
$this->uint32le, |
|
29
|
|
|
$this->uint32le, |
|
30
|
|
|
$this->uint8le |
|
31
|
|
|
]); |
|
32
|
|
|
} |
|
33
|
|
|
|
|
34
|
24 |
|
/** |
|
35
|
|
|
* @param BloomFilter $filter |
|
36
|
24 |
|
* @return BufferInterface |
|
37
|
|
|
*/ |
|
38
|
24 |
|
public function serialize(BloomFilter $filter) |
|
39
|
24 |
|
{ |
|
40
|
24 |
|
$parser = new Parser(); |
|
41
|
12 |
|
$parser->appendBuffer(Buffertools::numToVarInt(count($filter->getData()))); |
|
|
|
|
|
|
42
|
|
|
foreach ($filter->getData() as $i) { |
|
43
|
24 |
|
$parser->writeRawBinary(1, pack('c', $i)); |
|
|
|
|
|
|
44
|
24 |
|
} |
|
45
|
24 |
|
|
|
46
|
24 |
|
$parser->writeRawBinary(4, $this->uint32le->write($filter->getNumHashFuncs())); |
|
|
|
|
|
|
47
|
24 |
|
$parser->writeRawBinary(4, $this->uint32le->write($filter->getTweak())); |
|
|
|
|
|
|
48
|
12 |
|
$parser->writeRawBinary(1, $this->uint8le->write($filter->getFlags())); |
|
|
|
|
|
|
49
|
|
|
|
|
50
|
|
|
return $parser->getBuffer(); |
|
51
|
|
|
} |
|
52
|
|
|
|
|
53
|
|
|
/** |
|
54
|
|
|
* @param Parser $parser |
|
55
|
36 |
|
* @return BloomFilter |
|
56
|
|
|
*/ |
|
57
|
36 |
|
public function fromParser(Parser $parser) |
|
58
|
|
|
{ |
|
59
|
36 |
|
list ($vData, $numHashFuncs, $nTweak, $flags) = $this->template->parse($parser); |
|
60
|
36 |
|
|
|
61
|
18 |
|
return new BloomFilter( |
|
62
|
18 |
|
Bitcoin::getMath(), |
|
63
|
18 |
|
$vData, |
|
64
|
|
|
$numHashFuncs, |
|
65
|
18 |
|
$nTweak, |
|
66
|
|
|
$flags |
|
67
|
|
|
); |
|
68
|
|
|
} |
|
69
|
|
|
|
|
70
|
|
|
/** |
|
71
|
|
|
* @param string|BufferInterface $data |
|
72
|
36 |
|
* @return BloomFilter |
|
73
|
|
|
*/ |
|
74
|
36 |
|
public function parse($data) |
|
75
|
|
|
{ |
|
76
|
|
|
return $this->fromParser(new Parser($data)); |
|
77
|
|
|
} |
|
78
|
|
|
} |
|
79
|
|
|
|
In PHP it is possible to write to properties without declaring them. For example, the following is perfectly valid PHP code:
Generally, it is a good practice to explictly declare properties to avoid accidental typos and provide IDE auto-completion: