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<?php |
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namespace BitWasp\Bitcoin\Crypto\EcAdapter; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Adapter\EcAdapterInterface; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Impl\PhpEcc\Adapter\EcAdapter as PhpEcc; |
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use BitWasp\Bitcoin\Crypto\EcAdapter\Impl\Secp256k1\Adapter\EcAdapter as Secp256k1; |
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use BitWasp\Bitcoin\Math\Math; |
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use Composer\Semver\Semver; |
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use Mdanter\Ecc\Primitives\GeneratorPoint; |
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class EcAdapterFactory |
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{ |
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/** |
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* @var EcAdapterInterface |
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*/ |
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private static $adapter; |
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/** |
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* @var |
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*/ |
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private static $context; |
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/** |
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* @param null $flags |
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* @return resource |
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*/ |
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public static function getSecp256k1Context($flags = null) |
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{ |
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if (!extension_loaded('secp256k1')) { |
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throw new \RuntimeException('Secp256k1 not installed'); |
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} |
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if (self::$context === null) { |
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self::$context = secp256k1_context_create($flags ?: SECP256K1_CONTEXT_SIGN | SECP256K1_CONTEXT_VERIFY); |
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} |
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return self::$context; |
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} |
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/** |
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* @param Math $math |
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* @param GeneratorPoint $generator |
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* @return EcAdapterInterface |
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*/ |
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public static function getAdapter(Math $math, GeneratorPoint $generator) |
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{ |
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if (self::$adapter !== null) { |
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return self::$adapter; |
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} |
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if (extension_loaded('secp256k1') && Semver::satisfies(phpversion('secp256k1'), "~0.1.0")) { |
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self::$adapter = self::getSecp256k1($math, $generator); |
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} else { |
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self::$adapter = self::getPhpEcc($math, $generator); |
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} |
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return self::$adapter; |
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} |
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/** |
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* @param EcAdapterInterface $ecAdapter |
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*/ |
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public static function setAdapter(EcAdapterInterface $ecAdapter) |
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{ |
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self::$adapter = $ecAdapter; |
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} |
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/** |
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* @param Math $math |
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* @param GeneratorPoint $generator |
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* @return PhpEcc |
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*/ |
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public static function getPhpEcc(Math $math, GeneratorPoint $generator) |
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{ |
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return new PhpEcc($math, $generator); |
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} |
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/** |
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* @param Math $math |
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* @param GeneratorPoint $generator |
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* @return Secp256k1 |
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*/ |
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public static function getSecp256k1(Math $math, GeneratorPoint $generator) |
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{ |
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return new Secp256k1($math, $generator, self::getSecp256k1Context()); |
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} |
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} |
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Bit-Wasp /
bitcoin-php
