echo " : " . BIP32::key_to_address($pub[0]) . "\n";
/////////////////////////////
// We're gonna spent the first txout from this tx:
// https://www.blocktrail.com/BTC/tx/4a2231e13182cdb64fa2f9aae38fca46549891e9dc15e8aaf484d82fc6e0a1d8
// Set up inputs here
$inputs = array(array('txid' => '4a2231e13182cdb64fa2f9aae38fca46549891e9dc15e8aaf484d82fc6e0a1d8', 'vout' => 0));
// Set up outputs here
$outputs = array('1KuE17Fbcdsn3Ns5T9Wzi1epurRnKC9qVr' => BitcoinLib::toSatoshi(0.0004));
////////////////////////////
// Parameters for signing.
// Create JSON inputs parameter
// - These can come from bitcoind, or just knowledge of the txid/vout/scriptPubKey,
// and redeemScript if needed.
$json_inputs = json_encode(array(array('txid' => '4a2231e13182cdb64fa2f9aae38fca46549891e9dc15e8aaf484d82fc6e0a1d8', 'vout' => 0, 'scriptPubKey' => '76a914' . 'bf012bde5bd12eb7f9a66de5697b241b65a9a3c9' . '88ac')));
// build wallet from private key(s)
$wallet = array();
BIP32::bip32_keys_to_wallet($wallet, array($key), '00');
// Create raw transaction
$raw_transaction = RawTransaction::create($inputs, $outputs);
// Sign the transaction
$signed = RawTransaction::sign($wallet, $raw_transaction, $json_inputs);
print_r($signed);
echo "\n";
// Decode and print the TX
// print_r(RawTransaction::decode($sign['hex']));
// To broadcast the transaction onto the network
// - grab the $signed['hex']
// - `bitcoind sendrawtransaction <singed HEX>`
// or use an API that supports sendraw
// This transaction was broadcasted and confirmed here:
// https://www.blocktrail.com/BTC/tx/e04c14270b2a9fcff548bc0bdd16b22ec6c2903ea6aaf9f7656b81f1c4c6153b
/**
* signs a raw transaction
*
* @param $rawTransaction
* @param $inputs
* @return array
*/
protected function signTransaction($rawTransaction, $inputs)
{
$wallet = [];
$keys = [];
$redeemScripts = [];
foreach ($inputs as $input) {
//create private keys for signing
$path = BIP32Path::path($input['path'])->privatePath();
$keys[] = $this->primaryPrivateKey->buildKey($path);
$keys[] = $this->backupPrivateKey->buildKey($path->unhardenedPath());
$redeemScripts[] = $input['redeemScript'];
}
//add the keys and redeem scripts to a wallet to sign the transaction with
BIP32::bip32_keys_to_wallet($wallet, array_map(function (BIP32Key $key) {
return $key->tuple();
}, $keys));
RawTransaction::redeem_scripts_to_wallet($wallet, $redeemScripts);
return RawTransaction::sign($wallet, $rawTransaction, json_encode($inputs));
}
/**
* sign a raw transaction with the private keys that we have
*
* @param string $raw_transaction
* @param array[] $inputs
* @return array response from RawTransaction::sign
* @throws \Exception
*/
protected function signTransaction($raw_transaction, array $inputs)
{
$wallet = [];
$keys = [];
$redeemScripts = [];
foreach ($inputs as $input) {
$redeemScript = null;
$key = null;
if (isset($input['redeemScript'], $input['path'])) {
$redeemScript = $input['redeemScript'];
$path = BIP32Path::path($input['path'])->privatePath();
$key = $this->primaryPrivateKey->buildKey($path);
$address = $this->getAddressFromKey($key, $path);
if ($address != $input['address']) {
throw new \Exception("Generated address does not match expected address!");
}
} else {
throw new \Exception("No redeemScript/path for input");
}
if ($redeemScript && $key) {
$keys[] = $key;
$redeemScripts[] = $redeemScript;
}
}
BIP32::bip32_keys_to_wallet($wallet, array_map(function (BIP32Key $key) {
return $key->tuple();
}, $keys));
RawTransaction::redeem_scripts_to_wallet($wallet, $redeemScripts);
return RawTransaction::sign($wallet, $raw_transaction, json_encode($inputs));
}
