<?php
require "../vendor/autoload.php";
use BitWasp\Bitcoin\Bitcoin;
use BitWasp\Bitcoin\Key\PrivateKeyFactory;
use BitWasp\Bitcoin\Script\ScriptFactory;
use BitWasp\Bitcoin\Transaction\Factory\TxSigner;
use BitWasp\Bitcoin\Transaction\Factory\TxBuilder;
$ecAdapter = Bitcoin::getEcAdapter();
// Two users independently create private keys.
$pk1 = PrivateKeyFactory::fromHex('421c76d77563afa1914846b010bd164f395bd34c2102e5e99e0cb9cf173c1d87');
$pk2 = PrivateKeyFactory::fromHex('f7225388c1d69d57e6251c9fda50cbbf9e05131e5adb81e5aa0422402f048162');
// They exchange public keys, and a multisignature address is made.
$redeemScript = ScriptFactory::scriptPubKey()->multisig(2, [$pk1->getPublicKey(), $pk2->getPublicKey()]);
$os = ScriptFactory::scriptPubKey()->payToScriptHash($redeemScript);
// The address is funded with a transaction (fake, for the purposes of this script).
// You would do getrawtransaction normall
$fundTx = (new TxBuilder())->input('4141414141414141414141414141414141414141414141414141414141414141', 0)->output(50, $os)->get();
// One party wants to spend funds. He creates a transaction spending the funding tx to his address.
$spendTx = (new TxBuilder())->spendOutputFrom($fundTx, 0)->payToAddress(50, $pk1->getAddress())->get();
// Two parties sign the transaction (can be done in steps)
$signer = new TxSigner($ecAdapter, $spendTx);
$signer->sign(0, $pk1, $os, $redeemScript)->sign(0, $pk2, $os, $redeemScript);
$rawTx = $signer->get()->getHex();
echo "Fully signed transaction: " . $signer->get()->getHex() . "\n";
<?php
require_once __DIR__ . "/../vendor/autoload.php";
use BitWasp\Bitcoin\Bitcoin;
use BitWasp\Bitcoin\Transaction\TransactionFactory;
use BitWasp\Bitcoin\Address\AddressFactory;
use BitWasp\Bitcoin\Key\PrivateKeyFactory;
use BitWasp\Bitcoin\Transaction\Factory\TxSigner;
use BitWasp\Bitcoin\Transaction\Factory\TxBuilder;
Bitcoin::setNetwork(\BitWasp\Bitcoin\Network\NetworkFactory::bitcoinTestnet());
$network = Bitcoin::getNetwork();
$ecAdapter = Bitcoin::getEcAdapter();
$privateKey = PrivateKeyFactory::fromHex('17a2209250b59f07a25b560aa09cb395a183eb260797c0396b82904f918518d5');
echo "[Key: " . $privateKey->toWif($network) . " Address " . $privateKey->getAddress()->getAddress($network) . "]\n";
$txHex = '010000000114a2856f5a2992a4ca0814be16a0ae79e2f88a6f53a20fcbcad5249165f56ee7010000006a47304402201e733603ac36239010e05ad229b4a18411d5507950f696db0771a5b7fe8e051202203c46da7e970e89cbbdfb4ee62fa775597a32e5029ab1d2a94f786999df2c2fd201210271127f11b833239aefd400b11d576e7cc48c6969c8e5f8e30b0f5ec0a514edf7feffffff02801a0600000000001976a914c4126d1b70f5667e492e3301c3aa8bf1031e21a888ac75a29d1d000000001976a9141ef8d6913c289890a5e9ec249fedde4440877d0288ac88540500';
$myTx = TransactionFactory::fromHex($txHex);
$spendOutput = 0;
$recipient = AddressFactory::fromString('n1b2a9rFvuU9wBgBaoWngNvvMxRV94ke3x');
echo "[Send to: " . $recipient->getAddress($network) . " \n";
echo "Generate a transaction spending the one above \n";
$spendTx = (new TxBuilder())->spendOutputFrom($myTx, $spendOutput)->payToAddress(40000, $recipient)->get();
echo "Sign transaction\n";
$signer = new TxSigner($ecAdapter, $spendTx);
$signer->sign(0, $privateKey, $myTx->getOutput($spendOutput)->getScript());
echo "Generate transaction: \n";
$new = $signer->get();
echo $new->getHex() . "\n";