private void GetTransactionPosition(byte[] txHash, bool requireConfirmed, Action <ErrorCode, UInt64, UInt64> handler)
{
var managedHash = new hash_t
{
hash = txHash
};
IntPtr contextPtr = CreateContext(handler, managedHash);
ChainNative.kth_chain_async_transaction_position(nativeInstance_, contextPtr, managedHash, Helper.BoolToC(requireConfirmed), internalGetTransactionPositionHandler_);
}