Function place_edge_test_order 

pub(crate) async fn place_edge_test_order(
    grpc: &mut DydxGrpcClient,
    account: &Account,
    http: &DydxHttpClient,
    client_id: u32,
    instrument: &str,
    price: f64,
    is_mainnet: bool,
) -> Result<String, Box<dyn Error>>