| 1 |  |  | <?php | 
            
                                                                                                            
                            
            
                                    
            
            
                | 2 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 3 |  |  | namespace BitWasp\Bitcoin\Serializer\Block; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 4 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 5 |  |  | use BitWasp\Bitcoin\Block\BlockHeader; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 6 |  |  | use BitWasp\Bitcoin\Block\BlockHeaderInterface; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 7 |  |  | use BitWasp\Bitcoin\Serializer\Types; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 8 |  |  | use BitWasp\Buffertools\Buffer; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 9 |  |  | use BitWasp\Buffertools\Exceptions\ParserOutOfRange; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 10 |  |  | use BitWasp\Buffertools\Parser; | 
            
                                                                                                            
                            
            
                                    
            
            
                | 11 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 12 |  |  | class BlockHeaderSerializer | 
            
                                                                                                            
                            
            
                                    
            
            
                | 13 |  |  | { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 14 |  |  |     public function __construct() | 
            
                                                                                                            
                            
            
                                    
            
            
                | 15 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 16 |  |  |         $this->hash = Types::bytestringle(32); | 
                            
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                | 17 |  |  |         $this->uint32le = Types::uint32le(); | 
                            
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                | 18 | 1242 |  |         $this->int32le = Types::int32le(); | 
                            
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                | 19 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 20 | 1242 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 21 | 1242 |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 22 |  |  |      * @param \BitWasp\Buffertools\BufferInterface|string $string | 
            
                                                                                                            
                            
            
                                    
            
            
                | 23 |  |  |      * @return BlockHeader | 
            
                                                                                                            
                            
            
                                    
            
            
                | 24 |  |  |      * @throws ParserOutOfRange | 
            
                                                                                                            
                            
            
                                    
            
            
                | 25 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 26 |  |  |     public function parse($string) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 27 |  |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 28 | 30 |  |         return $this->fromParser(new Parser($string)); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 29 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 30 | 30 |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 31 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 32 |  |  |      * @param Parser $parser | 
            
                                                                                                            
                            
            
                                    
            
            
                | 33 |  |  |      * @return BlockHeader | 
            
                                                                                                            
                            
            
                                    
            
            
                | 34 |  |  |      * @throws ParserOutOfRange | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 35 |  |  |      */ | 
            
                                                                        
                            
            
                                    
            
            
                | 36 | 1242 |  |     public function fromParser(Parser $parser) | 
            
                                                                        
                            
            
                                    
            
            
                | 37 |  |  |     { | 
            
                                                                        
                            
            
                                    
            
            
                | 38 | 1242 |  |         try { | 
            
                                                                        
                            
            
                                    
            
            
                | 39 | 1242 |  |             return new BlockHeader( | 
            
                                                                        
                            
            
                                    
            
            
                | 40 | 1242 |  |                 $this->int32le->read($parser), | 
                            
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                | 41 | 1242 |  |                 $this->hash->read($parser), | 
            
                                                                        
                            
            
                                    
            
            
                | 42 | 1242 |  |                 $this->hash->read($parser), | 
            
                                                                        
                            
            
                                    
            
            
                | 43 | 1242 |  |                 (int) $this->uint32le->read($parser), | 
            
                                                                        
                            
            
                                    
            
            
                | 44 | 1242 |  |                 (int) $this->uint32le->read($parser), | 
            
                                                                        
                            
            
                                    
            
            
                | 45 | 1242 |  |                 (int) $this->uint32le->read($parser) | 
            
                                                                        
                            
            
                                    
            
            
                | 46 |  |  |             ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 47 |  |  |         } catch (ParserOutOfRange $e) { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 48 |  |  |             throw new ParserOutOfRange('Failed to extract full block header from parser'); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 49 |  |  |         } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 50 |  |  |     } | 
            
                                                                                                            
                            
            
                                    
            
            
                | 51 |  |  |  | 
            
                                                                                                            
                            
            
                                    
            
            
                | 52 |  |  |     /** | 
            
                                                                                                            
                            
            
                                    
            
            
                | 53 | 108 |  |      * @param BlockHeaderInterface $header | 
            
                                                                                                            
                            
            
                                    
            
            
                | 54 |  |  |      * @return \BitWasp\Buffertools\BufferInterface | 
            
                                                                                                            
                            
            
                                    
            
            
                | 55 |  |  |      */ | 
            
                                                                                                            
                            
            
                                    
            
            
                | 56 |  |  |     public function serialize(BlockHeaderInterface $header) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 57 | 108 |  |     { | 
            
                                                                                                            
                            
            
                                    
            
            
                | 58 |  |  |         return new Buffer( | 
            
                                                                                                            
                            
            
                                    
            
            
                | 59 | 90 |  |             $this->int32le->write($header->getVersion()) . | 
                            
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                | 60 | 45 |  |             $this->hash->write($header->getPrevBlock()) . | 
            
                                                                                                            
                            
            
                                    
            
            
                | 61 | 45 |  |             $this->hash->write($header->getMerkleRoot()) . | 
            
                                                                                                            
                            
            
                                    
            
            
                | 62 | 45 |  |             $this->uint32le->write($header->getTimestamp()) . | 
            
                                                                                                            
                            
            
                                    
            
            
                | 63 | 45 |  |             $this->uint32le->write($header->getBits()) . | 
            
                                                                                                            
                            
            
                                    
            
            
                | 64 | 90 |  |             $this->uint32le->write($header->getNonce()) | 
            
                                                                                                            
                            
            
                                    
            
            
                | 65 |  |  |         ); | 
            
                                                                                                            
                            
            
                                    
            
            
                | 66 | 45 |  |     } | 
            
                                                                                                            
                                                                
            
                                    
            
            
                | 67 |  |  | } | 
            
                                                        
            
                                    
            
            
                | 68 |  |  |  | 
            
                        
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: