private function uniqueInput(Transaction $transaction, $acc)
{
$inputs = isset($acc['inputs']) ? $acc['inputs'] : [];
$transactions = isset($acc['transactions']) ? $acc['transactions'] : [];
$squashedTransaction = Signer::squash($transaction);
$acc['transactions'][] = $squashedTransaction;
if (in_array($squashedTransaction, $transactions)) {
return $acc;
}
foreach ($transaction->getInputs() as $input) {
$squashed = Signer::squash($input);
if (in_array($squashed, $inputs)) {
$this->errors[] = "Output already used";
}
$inputs[] = $squashed;
}
$acc['inputs'] = $inputs;
return $acc;
}
/**
* @return Binary
*/
public function hash()
{
return new Binary(hash('sha256', Signer::squash($this), true));
}
/**
* @param Base[] $bases
* @param Output $output
* @param Transaction $confirmed
* @param Signer $signer
* @return Confirmation
*/
public static function signedConfirmation($bases, Output $output, Transaction $confirmed, Signer $signer)
{
$hash = self::hash(Signer::squash($confirmed));
return new Confirmation($bases, $output, $hash, $signer->sign([$bases, $output, $hash]));
}
