PHP Bitwasp，签署比特币现金交易

Question

我尝试签署测试比特币现金交易，然后广播。 bitwasp 0.0.35.0版本，代码为：

   $utxoOwnerPrivateKey = 'MyPrIvAtEKey';//public key is "16Dbmp13CqdLVwjXrd6amF48t7L8gYSGBj", note - the real private key is another
   $utxo = '5e44cdab9cb4a4f1871f2137ab568bf9ef2760e52816971fbaf0198f19e28378';
   $utxoAmount = 598558;
   $reciverPublicKey = '1EjCxux1FcohsBNGzY9KdF59Dz7MYHQyPN';
   $fee = 1000;

   $addressCreator = new \Btccom\BitcoinCash\Address\AddressCreator();

   $networkObject = \Btccom\BitcoinCash\Network\NetworkFactory::bitcoinCash();
   $keyPairInput = \BitWasp\Bitcoin\Key\PrivateKeyFactory::fromWif($utxoOwnerPrivateKey, null, $networkObject);


   $outpoint = new \BitWasp\Bitcoin\Transaction\OutPoint(\BitWasp\Buffertools\Buffer::hex($utxo, 32), 0);


   $transaction = \BitWasp\Bitcoin\Transaction\TransactionFactory::build()
       ->spendOutPoint($outpoint)
       ->payToAddress($utxoAmount - $fee, $addressCreator->fromString($reciverPublicKey, $networkObject) )
       ->get();

   echo "Unsigned transaction: " . $transaction->getHex() . '<BR><BR>';

   $signScript = \BitWasp\Bitcoin\Script\ScriptFactory::scriptPubKey()->payToPubKeyHash($keyPairInput->getPublicKey()->getPubKeyHash());
   $txOut = new \BitWasp\Bitcoin\Transaction\TransactionOutput($utxoAmount  - $fee, $signScript);

   $signer = new \BitWasp\Bitcoin\Transaction\Factory\Signer($transaction);

   $signatureChecker = \Btccom\BitcoinCash\Transaction\Factory\Checker\CheckerCreator::fromEcAdapter( \BitWasp\Bitcoin\Bitcoin::getEcAdapter() ); // for version 0.0.35
   $signer->setCheckerCreator( $signatureChecker ); // for version 0.0.35
   $input = $signer->input(0, $txOut);
   $signatureType = \Btccom\BitcoinCash\Transaction\SignatureHash\SigHash::ALL | \Btccom\BitcoinCash\Transaction\SignatureHash\SigHash::BITCOINCASH;
   $input->sign($keyPairInput, $signatureType);
   $signed = $signer->get();


   echo "Witness serialized transaction: " . $signed->getHex() . '<BR><BR>';
   echo "Base serialized transaction: " . $signed->getBaseSerialization()->getHex() . '<BR><BR>';
   echo "Script validation result: " . ($input->verify() ? "yes\n" : "no\n"). '<BR><BR>';

   die();

在这种情况下，我得到了结果：

Script validation result: no

尝试broadcast the BCH transaction 会出错：

An error occured:
16: mandatory-script-verify-flag-failed (Signature must be zero for failed CHECK(MULTI)SIG operation). Code:-26

我认为，这意味着签名是错误的。如果我们删除标志$signatureType（保持这个默认值），那么Script validation result将是yes，但是广播会报错：

16: mandatory-script-verify-flag-failed (Signature must use SIGHASH_FORKID). Code:-26

我认为，这意味着 - 在比特币网络中签署的交易，必须由比特币现金规则签署。也许我错了。但是比特币交易签名很好。 Bitwasp 没有手册，如何签署比特币现金交易，我有相同的 bitwasp v.0.0.34.2 代码（没有插件“btccom/bitwasp-bitcoin-bch-addon”，使用$signer->redeemBitcoinCash(true); 函数）但它给出同样的结果。

有趣的是，在比特币现金签名者的代码中，它采用内部变量amount 并将其包含在哈希中：

$hasher = new V1Hasher($this->transaction, $this->amount);

但是对于比特币来说，bitwasp 不取金额，大概是从交易中取了一笔金额。

请帮我签署交易，bitwasp 只有比特币示例，没有比特币现金。在没有第三方软件的情况下很难找到任何关于 php altcoins 签名的信息。问候。

Answer 1

使用 PHP bitwasp v.0.0.35 库签署比特币现金交易的代码有效！

    $unspendedTx = '49343e0a4ef29b819f87df1371c6f8eafa1f235074a27fb6aa5f4ab4c48e5c16';
    $utxOutputIndex = 0;
    $utxoPrivateKey = 'MyPrIvAtEKey';
    $utxoAmount = 300000;
    $reciverPublicKey = '1E8XaWNsCWyVaZaWTLh8uBdAZjLQqwWmzM';
    $fee = 1000;

    $networkObject = \Btccom\BitcoinCash\Network\NetworkFactory::bitcoinCash();

    $outpoint = new \BitWasp\Bitcoin\Transaction\OutPoint(\BitWasp\Buffertools\Buffer::hex($unspendedTx, 32), $utxOutputIndex /* index of utxo in transaction, generated it */);
    $destination = \BitWasp\Bitcoin\Script\ScriptFactory::scriptPubKey()->payToPubKeyHash( (new \Btccom\BitcoinCash\Address\AddressCreator())->fromString($reciverPublicKey)->getHash() );

    $transaction = \BitWasp\Bitcoin\Transaction\TransactionFactory::build()
        ->spendOutPoint($outpoint)
        ->output($utxoAmount - $fee, $destination)
        ->get();
    echo "Unsigned transaction: " . $transaction->getHex() . '<BR><BR>';


    $keyPairInput = \BitWasp\Bitcoin\Key\PrivateKeyFactory::fromWif($utxoPrivateKey, null, $networkObject);
    $txOut = new \BitWasp\Bitcoin\Transaction\TransactionOutput($utxoAmount, \BitWasp\Bitcoin\Script\ScriptFactory::scriptPubKey()->payToPubKeyHash(  $keyPairInput->getPubKeyHash() ) );
    $signer = new \BitWasp\Bitcoin\Transaction\Factory\Signer($transaction);

    $signatureChecker = \Btccom\BitcoinCash\Transaction\Factory\Checker\CheckerCreator::fromEcAdapter( \BitWasp\Bitcoin\Bitcoin::getEcAdapter() ); // for version 0.0.35
    $signer->setCheckerCreator( $signatureChecker ); // for version 0.0.35

    $input = $signer->input(0, $txOut);
    $signatureType = \Btccom\BitcoinCash\Transaction\SignatureHash\SigHash::ALL | \Btccom\BitcoinCash\Transaction\SignatureHash\SigHash::BITCOINCASH;
    $input->sign($keyPairInput, $signatureType);
    $signed = $signer->get();


    echo "Transaction: " . $signed->getHex() . '<BR><BR>';
    die();

我已经广播了这个 PHP 生成的测试事务，请参阅 link to tx。可能问题出在

->payToAddress($utxoAmount - $fee, $addressCreator->fromString($reciverPublicKey, $networkObject) )

也许payToAddress 有一个错误，因为“手”脚本创建提供了另一个事务。第二：

$txOut = new \BitWasp\Bitcoin\Transaction\TransactionOutput($utxoAmount  - $fee, $signScript);

我们必须免费创建 tx 输入（之前的输出）。

使用的库（composer.json）：

{
    "require" : {
        "php" : ">=7.0",
        "bitwasp/bitcoin": "0.0.35.0",
        "btccom/bitwasp-bitcoin-bch-addon" : "0.0.2"
    }
}

希望，这将有助于 PHP 上的所有山寨币 api 创建者。