You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: mod.rs
    path of file: ./repos/enigma-core/enigma-core/app/src/wasm_u
    
    the code of the file until where you have to start completion: pub mod wasm;

use crate::common_u::errors::EnclaveFailError;
use crate::db::{Delta, DeltaKey, Stype};
use std::{fmt, convert::TryFrom};
use enigma_types::{EnclaveReturn, ExecuteResult, ContractAddress};
use failure::Error;
use sgx_types::*;

#[derive(Clone)]
pub struct WasmTaskResult {
    pub bytecode: Box<[u8]>,
    pub output: Box<[u8]>, // On
    
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        let mut debug_builder = f.debug_struct("WasmTaskResult");
        debug_builder.field("bytecode", &self.bytecode);
        debug_builder.field("output", &self.output);
        debug_builder.field("delta", &self.delta);
        debug_builder.field("eth_payload", &self.eth_payload);
        debug_builder.field("eth_contract_addr", &self.eth_contract_addr);
        debug_builder.field("signature", &(&self.signature[..]));
        debug_builder.field("used_gas", &self.used_gas);
        debug_builder.finish()
    }