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<?php |
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declare(strict_types=1); |
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namespace BitWasp\Bitcoin\Key\Factory; |
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use BitWasp\Bitcoin\Bitcoin; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Adapter\EcAdapterInterface; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Key\KeyInterface; |
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use BitWasp\Bitcoin\Key\Deterministic\ElectrumKey; |
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use BitWasp\Bitcoin\Mnemonic\Electrum\ElectrumWordListInterface; |
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use BitWasp\Bitcoin\Mnemonic\MnemonicFactory; |
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use BitWasp\Buffertools\Buffer; |
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use BitWasp\Buffertools\BufferInterface; |
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class ElectrumKeyFactory |
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{ |
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/** |
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* @var EcAdapterInterface |
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*/ |
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private $adapter; |
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/** |
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* @var PrivateKeyFactory |
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*/ |
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private $privateFactory; |
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/** |
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* ElectrumKeyFactory constructor. |
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* @param EcAdapterInterface|null $ecAdapter |
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*/ |
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public function __construct(EcAdapterInterface $ecAdapter = null) |
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{ |
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$this->adapter = $ecAdapter ?: Bitcoin::getEcAdapter(); |
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$this->privateFactory = PrivateKeyFactory::uncompressed($ecAdapter); |
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} |
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/** |
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* @param string $mnemonic |
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* @param ElectrumWordListInterface $wordList |
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* @return ElectrumKey |
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* @throws \Exception |
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*/ |
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public function fromMnemonic(string $mnemonic, ElectrumWordListInterface $wordList = null): ElectrumKey |
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{ |
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$mnemonicConverter = MnemonicFactory::electrum($wordList, $this->adapter); |
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$entropy = $mnemonicConverter->mnemonicToEntropy($mnemonic); |
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return $this->getKeyFromSeed($entropy); |
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} |
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/** |
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* @param BufferInterface $seed |
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* @return ElectrumKey |
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* @throws \Exception |
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*/ |
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public function getKeyFromSeed(BufferInterface $seed): ElectrumKey |
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{ |
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// Really weird, did electrum actually hash hex string seeds? |
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$binary = $oldseed = $seed->getHex(); |
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// Perform sha256 hash 5 times per iteration |
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for ($i = 0; $i < 5*20000; $i++) { |
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// Hash should return binary data |
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$binary = hash('sha256', $binary . $oldseed, true); |
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} |
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// Convert binary data to hex. |
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$secretExponent = new Buffer($binary, 32); |
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return $this->fromSecretExponent($secretExponent); |
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} |
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/** |
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* @param BufferInterface $secret |
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* @return ElectrumKey |
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*/ |
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public function fromSecretExponent(BufferInterface $secret): ElectrumKey |
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{ |
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$masterKey = $this->privateFactory->fromBuffer($secret); |
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return $this->fromKey($masterKey); |
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} |
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/** |
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* @param KeyInterface $key |
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* @return ElectrumKey |
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*/ |
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public function fromKey(KeyInterface $key): ElectrumKey |
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{ |
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return new ElectrumKey($key); |
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} |
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} |
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Bit-Wasp /
bitcoin-php
