How to transfer BTC from a P2SH address? #895

        $privKeyFactory = new PrivateKeyFactory();
        $privateKey = $privKeyFactory->fromWif($from_addr_wif);
        $prog = WitnessProgram::V0($privateKey->getPublicKey()->getPubKeyHash());
        $redeemScript = new P2shScript($prog->getScript());

        $spendFromAddress = $redeemScript->getAddress();
        $addressCreator = new AddressCreator();
        $sendToAddress = $addressCreator->fromString($to_addr);

        $transaction = TransactionFactory::build();
        foreach($utxo_hash_list as $v){
            $transaction->input($v['txid'], (int)$v['n']);
        }
        $real_number_sato = $real_number * pow(10,8);
        $transaction->payToAddress($real_number_sato, $sendToAddress);

        $number_satoshi = $number * pow(10,8); 
        $txOut = new TransactionOutput($number_satoshi, $redeemScript->getOutputScript());

        $signData = (new SignData())->p2sh($redeemScript);
        $signer = new Signer($transaction->get());

        $input = $signer->input(0, $txOut, $signData);
        $input->sign($privateKey);

        $signed = $signer->get();
        $raw_data = $signed->getHex();

        //then broadcast   https://api.blockcypher.com/