bip32.php

<?php
$wallet[0] = BIP32::master_key('b861e093a58718e145b9791af35fb111');
$wallet[1] = BIP32::master_key('b861e093a58718e145b9791af35fb222');
$wallet[2] = BIP32::master_key('b861e093a58718e145b9791af35fb333');
print_r($wallet);

echo "Now we will generate a m/0' extended key. These will yield a private key\n";
$user[0] = BIP32::build_key($wallet[0][0], "3'");
$user[1] = BIP32::build_key($wallet[1][0], "23'");
$user[2] = BIP32::build_key($wallet[2][0], "9'");
print_r($user);

// As the previous is a private key, we should convert to the corresponding
// public key: M/0'
echo "As the previous is a private key, we should convert it to the corresponding\n";
echo "public key: M/0' \n";
$pub[0] = BIP32::extended_private_to_public($user[0]);
$pub[1] = BIP32::extended_private_to_public($user[1]);
$pub[2] = BIP32::extended_private_to_public($user[2]);
print_r($pub);

echo "This is the key you will ask your users for. For repeated transactions\n";
echo "BIP32 allows you to deterministically generate public keys, meaning less\n";
echo "effort for everyone involved\n\n";
echo "Now we can generate many multisignature addresses from what we have here: \n";

$multisig = null;

for($i = 0; $i < 1; $i++) {

    // create derived public keys
    $bip32key[0] = BIP32::build_key($pub[0], "0/{$i}");
    $bip32key[1] = BIP32::build_key($pub[1], "0/{$i}");
    $bip32key[2] = BIP32::build_key($pub[2], "0/{$i}");

    // convert to proper public keys format
    $pubkey[0] = BIP32::extract_public_key($bip32key[0]);
    $pubkey[1] = BIP32::extract_public_key($bip32key[1]);
    $pubkey[2] = BIP32::extract_public_key($bip32key[2]);
    $output->writeln('<info>Public keys:</info>');
    print_r($pubkey);
    $multisig = RawTransaction::create_multisig(2, $pubkey);
    print_r($multisig);
}

$inputs = [
    [
        'txid' => '2013db04623fa4dfd6b9cfec6cfd71dc23d7f94e612563578b7df6cfa4a3a3f7',
        'vout' => 0,
        'scriptPubKey' => 'a91471535703e6553bbe62343a13785eb9573cc41fc387',
        'redeemScript' => '522103b8c960a5342172c109512b7a2f9f6a06736aaf2ca5a7577e708a4a8984e2b2102103ee743226b7e9a9b691fef59ed10b6288093fdd031a78ac44d827846437b9ee892102b45219b966fcf4fee51ca83181535c4b6d7fff28b77e7ffbaf3f7d7a6cb788c353ae'
    ]
];

$outputs = [
    '1Ms3F5X7wGgKHw88fNWjEE32tRDK1q56KU' => '0.0002'
];

$rawTransaction = RawTransaction::create($inputs, $outputs);
$output->writeln(sprintf('Transaction unsigned: <info>%s</info>', $rawTransaction));

$privateWIF = [];
foreach ($user as $index => $u) {

    // get details of private key
    $keyDetails = BIP32::import($u[0]);
    // then convert it to WIF format
    $prvKey = BitcoinLib::private_key_to_WIF($keyDetails['key'], false, $keyDetails['version']);

    if (!BitcoinLib::validate_WIF($prvKey)) { throw new \Exception("Failed to validate WIF", 1); }

    $privateWIF []= $prvKey;
    $output->writeln(sprintf('Private key WIF format #%d: <info>%s</info>', $index, $prvKey));
}

echo json_encode($inputs).PHP_EOL;

?>