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<?php |
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namespace BitWasp\Bitcoin\Serializer\Chain; |
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use BitWasp\Bitcoin\Chain\BlockLocator; |
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use BitWasp\Bitcoin\Serializer\Types; |
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use BitWasp\Buffertools\Buffer; |
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use BitWasp\Buffertools\BufferInterface; |
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use BitWasp\Buffertools\Buffertools; |
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use BitWasp\Buffertools\Parser; |
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use BitWasp\Buffertools\Template; |
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class BlockLocatorSerializer |
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{ |
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/** |
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* @var Template |
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*/ |
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private $template; |
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public function __construct() |
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{ |
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$this->varint = Types::varint(); |
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$this->bytestring32 = $bytestring32 = Types::bytestringle(32); |
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$this->template = new Template([ |
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Types::vector(function (Parser $parser) use ($bytestring32) { |
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return $bytestring32->read($parser); |
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}), |
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$bytestring32 |
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]); |
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} |
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/** |
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* @param Parser $parser |
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* @return BlockLocator |
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*/ |
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public function fromParser(Parser $parser) |
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{ |
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$numHashes = $this->varint->read($parser); |
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$hashes = []; |
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for ($i = 0; $i < $numHashes; $i++) { |
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$hashes[] = $this->bytestring32->read($parser); |
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} |
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$hashStop = $this->bytestring32->read($parser); |
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return new BlockLocator($hashes, $hashStop); |
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} |
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/** |
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* @param BufferInterface|string $data |
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* @return BlockLocator |
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*/ |
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public function parse($data) |
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{ |
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return $this->fromParser(new Parser($data)); |
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} |
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/** |
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* @param BlockLocator $blockLocator |
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* @return \BitWasp\Buffertools\BufferInterface |
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*/ |
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public function serialize(BlockLocator $blockLocator) |
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{ |
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$binary = Buffertools::numToVarInt(count($blockLocator->getHashes()))->getBinary(); |
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foreach ($blockLocator->getHashes() as $hash) { |
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$binary .= Buffertools::flipBytes($hash->getBinary()); |
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} |
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$binary .= $blockLocator->getHashStop()->getBinary(); |
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return new Buffer($binary); |
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} |
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} |
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Bit-Wasp /
bitcoin-php
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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: