/**
* @param PublicKeyInterface $publicKey
* @param int|string $integer
* @return \BitWasp\Bitcoin\Key\PublicKey
* @throws \Exception
*/
public function publicKeyMul(PublicKeyInterface $publicKey, $integer)
{
$pubKey = $publicKey->getBuffer()->getBinary();
$ret = (bool) \secp256k1_ec_pubkey_tweak_mul($pubKey, $this->getBinaryScalar($integer));
if ($ret === false) {
throw new \Exception('Secp256k1 pubkey tweak mul: failed');
}
return $this->getRelatedPublicKey($publicKey, $pubKey);
}
/**
* @param int $tweak
* @return PublicKey
* @throws \Exception
*/
public function tweakMul($tweak)
{
$context = $this->ecAdapter->getContext();
$math = $this->ecAdapter->getMath();
$bin = pack('H*', str_pad($math->decHex($tweak), 64, '0', STR_PAD_LEFT));
$clone = $this->clonePubkey();
if (1 !== secp256k1_ec_pubkey_tweak_mul($context, $clone, $bin)) {
throw new \RuntimeException('Secp256k1: tweak mul failed.');
}
return new PublicKey($this->ecAdapter, $clone, $this->compressed);
}
/**
* @expectedException \PHPUnit_Framework_Error_Warning
*/
public function testEnforceZvalString()
{
$tweak = $this->pack('0af79b2b747548d59a4a765fb73a72bc4208d00b43d0606c13d332d5c284b0ef');
$publicKey = array();
\secp256k1_ec_pubkey_tweak_mul(TestCase::getContext(), $publicKey, $tweak);
}