public static boolean isInternal(@Nonnull final Transaction tx) {
if (tx.isCoinBase()) return false;
final List<TransactionOutput> outputs = tx.getOutputs();
if (outputs.size() != 1) return false;
try {
final TransactionOutput output = outputs.get(0);
final Script scriptPubKey = output.getScriptPubKey();
if (!scriptPubKey.isSentToRawPubKey()) return false;
return true;
} catch (final ScriptException x) {
return false;
}
}
