oracle_script_prepare_execute.rs

// Preparation Phase
#[no_mangle]
fn prepare_impl(input: Input) {
    // Coingecko volume data source
    oei::ask_external_data(1, 9, &input.symbol.as_bytes());
}

// Execution Phase
#[no_mangle]
fn execute_impl(input: Input) -> Output {
    let avg: f64 = ext::load_average(1);
    Output { volume: (avg * input.multiplier as f64) as u64 }
}