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<?php |
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namespace BitWasp\Bitcoin\Serializer\Key\HierarchicalKey; |
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use BitWasp\Buffertools\Buffer; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Adapter\EcAdapterInterface; |
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use BitWasp\Buffertools\BufferInterface; |
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use BitWasp\Buffertools\Exceptions\ParserOutOfRange; |
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use BitWasp\Bitcoin\Key\PrivateKeyFactory; |
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use BitWasp\Bitcoin\Key\PublicKeyFactory; |
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use BitWasp\Bitcoin\Network\NetworkInterface; |
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use BitWasp\Buffertools\Parser; |
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use BitWasp\Bitcoin\Key\Deterministic\HierarchicalKey; |
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use BitWasp\Buffertools\TemplateFactory; |
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class ExtendedKeySerializer |
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{ |
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/** |
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* @var NetworkInterface |
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*/ |
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private $network; |
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/** |
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* @var EcAdapterInterface |
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*/ |
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private $ecAdapter; |
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/** |
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* @param EcAdapterInterface $ecAdapter |
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* @param NetworkInterface $network |
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* @throws \Exception |
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*/ |
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public function __construct(EcAdapterInterface $ecAdapter, NetworkInterface $network) |
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{ |
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try { |
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$network->getHDPrivByte(); |
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$network->getHDPubByte(); |
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} catch (\Exception $e) { |
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throw new \Exception('Network not configured for HD wallets'); |
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} |
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$this->network = $network; |
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$this->ecAdapter = $ecAdapter; |
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} |
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/** |
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* @return \BitWasp\Buffertools\Template |
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*/ |
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public function getTemplate() |
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{ |
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return (new TemplateFactory()) |
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->bytestring(4) |
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->uint8() |
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->uint32() |
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->uint32() |
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->uint256() |
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->bytestring(33) |
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->getTemplate(); |
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} |
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/** |
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* @param HierarchicalKey $key |
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* @return BufferInterface |
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*/ |
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public function serialize(HierarchicalKey $key) |
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{ |
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list ($prefix, $data) = ($key->isPrivate()) |
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? [$this->network->getHDPrivByte(), '00' . $key->getPrivateKey()->getHex()] |
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: [$this->network->getHDPubByte(), $key->getPublicKey()->getHex()]; |
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return $this->getTemplate()->write([ |
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Buffer::hex($prefix, 4), |
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$key->getDepth(), |
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$key->getFingerprint(), |
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$key->getSequence(), |
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$key->getChainCode(), |
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Buffer::hex($data, 33) |
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]); |
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} |
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/** |
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* @param Parser $parser |
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* @return HierarchicalKey |
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* @throws ParserOutOfRange |
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*/ |
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public function fromParser(Parser $parser) |
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{ |
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try { |
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list ($bytes, $depth, $parentFingerprint, $sequence, $chainCode, $keyData) = $this->getTemplate()->parse($parser); |
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/** @var BufferInterface $keyData */ |
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/** @var BufferInterface $bytes */ |
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$bytes = $bytes->getHex(); |
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} catch (ParserOutOfRange $e) { |
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throw new ParserOutOfRange('Failed to extract HierarchicalKey from parser'); |
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} |
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if ($bytes !== $this->network->getHDPubByte() && $bytes !== $this->network->getHDPrivByte()) { |
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throw new \InvalidArgumentException('HD key magic bytes do not match network magic bytes'); |
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} |
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$key = ($this->network->getHDPrivByte() === $bytes) |
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? PrivateKeyFactory::fromHex($keyData->slice(1)->getHex(), true, $this->ecAdapter) |
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: PublicKeyFactory::fromHex($keyData->getHex(), $this->ecAdapter); |
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return new HierarchicalKey($this->ecAdapter, $depth, $parentFingerprint, $sequence, $chainCode, $key); |
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} |
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/** |
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* @param BufferInterface $buffer |
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* @return \BitWasp\Bitcoin\Key\Deterministic\HierarchicalKey |
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* @throws ParserOutOfRange |
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* @throws \Exception |
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*/ |
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public function parse(BufferInterface $buffer) |
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{ |
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$parser = new Parser($buffer); |
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return $this->fromParser($parser); |
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} |
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} |
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Bit-Wasp /
bitcoin-php
