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: main.rs
    path of file: ./repos/diem/language/diem-tools/transaction-replay/src
    
    the code of the file until where you have to start completion: // Copyright (c) The Diem Core Contributors
// SPDX-License-Identifier: Apache-2.0

use anyhow::{bail, Result};
use diem_transaction_replay::DiemDebugger;
use diem_types::{
    account_address::AccountAddress,
    event::EventKey,
    transaction::{TransactionPayload, Version},
};
use difference::Changeset;
use move_core_types::effects::ChangeSet;
use std::{fs, path::PathBuf};
use structopt::StructOpt;

#[derive(Debug, StructOpt)]
struct Opt {
    /// Path to the local DiemDB file
    #[structopt(long, parse(from_os_str))]
    db: Option<PathBuf>,
    /// Full URL address to connect to - should include port number, if applicable
    #[structopt(short = "u", long)]
    url: Option<String>,
    /// If true, persist the effects of replaying transactions via `cmd` to disk in a format understood by the Move CLI
    #[structopt(short = "s", global = true)]
    save_write_sets: bool,
    #[structopt(subcommand)] // Note that we mark a field as a subcommand
    cmd: Command,
}

#[derive(Debug, StructOpt)]
enum Command {
    /// Replay transactions starting from version `start` to `start + limit`.
    #[structopt(name = "replay-transactions")]
    ReplayTransactions { start: Version, limit: u64 },
    /// Replay the last `txns` committed transactions.
    #[structopt(name = "replay-recent-transactions")]
    ReplayRecentTransactions { txns: u64 },
    /// Replay the `seq`th transaction committed by `account`
    #[structopt(name = "replay-transaction-by-sequence-number")]
    ReplayTransactionBySequence {
        #[structopt(parse(try_from_str))]
        account: AccountAddress,
        seq: u64,
    },
    /// Execute a writeset as if it is signed by the Diem Root and print the result.
    #[structopt(name = "replay-writeset")]
    ReplayWriteSetAtVersion {
        /// Path to a serialized WriteSetPayload. Could be generated by the `diem-writeset-generator` tool.
        #[structopt(parse(from_os_str))]
        write_set_blob_path: PathBuf,
        version: u64,
    },
    /// Annotate the resources stored under `account` at `version`.
    #[structopt(name = "annotate-account")]
    AnnotateAccount {
        #[structopt(parse(try_from_str))]
        account: AccountAddress,
        version: Option<Version>,
    },
    /// Annotate the resources stored under `diem_root`, `treasury_compliance` and all validator addresses.
    #[structopt(name = "annotate-key-accounts")]
    AnnotateKeyAccounts { version: Version },
    /// Annotate the events stored under `key` with range `start` to `start+limit`.
    #[structopt(name = "annotate-events")]
    AnnotateEvents { key: String, start: u64, limit: u64 },
    /// Diff between the resources stored under two versions of the same `account`
    #[structopt(name = "diff-account")]
    DiffAccount {
        #[structopt(parse(try_from_str))]
        account: AccountAddress,
        base_version: Version,
        revision: Version,
    },
    /// Get the bytecode for all Diem Framework modules at `version`
    #[structopt(name = "get-modules")]
    GetModules { version: Version },
    #[structopt(name = "bisect-transaction")]
    BisectTransaction {
        #[structopt(parse(from_os_str))]
        script_path: PathBuf,
        #[structopt(parse(try_from_str))]
        sender: AccountAddress,
        begin: Version,
        end: Version,
        #[structopt(long)]
        rebuild_stdlib: bool,
    },
}

fn main() -> Result<()> {
    let opt = Opt::from_args();
    let debugger = if let Some(p) = opt.db {
        DiemDebugger::db(p)?
    } else if let Some(url) = opt.url {
        DiemDebugger::json_rpc(url.as_str())?
    } else {
        panic!("No debugger attached")
    };

    println!("Connection Succeeded");

    match opt.cmd {
        Command::ReplayTransactions { start, limit } => {
            println!(
                "{:#?}",
                debugger.execute_past_transactions(start, limit, opt.save_write_sets)
            );
        }
        Command::ReplayRecentTransactions { txns } => {
            let latest_version = debugger
                .get_latest_version()
                .expect("Failed to get latest version");
            ass
    
fn main() -> Result<()> {
    let opt = Opt::from_args();
    let debugger = if let Some(p) = opt.db {
        DiemDebugger::db(p)?
    } else if let Some(url) = opt.url {
        DiemDebugger::json_rpc(url.as_str())?
    } else {
        panic!("No debugger attached")
    };

    println!("Connection Succeeded");

    match opt.cmd {
        Command::ReplayTransactions { start, limit } => {
            println!(
                "{:#?}",
                debugger.execute_past_transactions(start, limit, opt.save_write_sets)
            );
        }
        Command::ReplayRecentTransactions { txns } => {
            let latest_version = debugger
                .get_latest_version()
                .expect("Failed to get latest version");
            assert!(latest_version >= txns);
            println!(
                "{:#?}",
                debugger.execute_past_transactions(
                    latest_version - txns,
                    txns,
                    opt.save_write_sets
                )
            );
        }
        Command::ReplayTransactionBySequence { account, seq } => {
            let version = debugger
                .get_version_by_account_sequence(account, seq)?
                .expect("Version not found");
            println!(
                "Executing transaction at version: {:?}\n{:#?}",
                version,
                debugger.execute_past_transactions(version, 1, opt.save_write_sets)
            );
        }
        Command::ReplayWriteSetAtVersion {
            write_set_blob_path: path,
            version,
        } => {
            let transaction_payload = bcs::from_bytes(&fs::read(path.as_path())?)?;
            let writeset_payload = if let TransactionPayload::WriteSet(ws) = transaction_payload {
                ws
            } else {
                bail!("Unexpected transaction payload: {:?}", transaction_payload);
            };
            println!(
                "{:?}",
                debugger.execute_writeset_at_version(
                    version,
                    &writeset_payload,
                    opt.save_write_sets
                )?
            );
        }
        Command::AnnotateAccount {
            account,
            version: version_opt,
        } => {
            let version = match version_opt {
                Some(v) => v,
                None => debugger.get_latest_version()?,
            };
            println!(
                "{}",
                debugger
                    .annotate_account_state_at_version(account, version, opt.save_write_sets)?
                    .expect("Account not found")
            )
        }
        Command::AnnotateEvents { key, start, limit } => {
            debugger.pretty_print_events(
                &EventKey::from_bytes(hex::decode(key.as_str())?)?,
                start,
                limit,
            )?;
        }
        Command::AnnotateKeyAccounts { version } => {
            for (addr, state) in
                debugger.annotate_key_accounts_at_version(version, opt.save_write_sets)?
            {
                println!("Account: {}, State: {}", addr, state);
            }
        }
        Command::DiffAccount {
            account,
            base_version,
            revision,
        } => {
            let base_annotation = format!(
                "{}",
                debugger
                    .annotate_account_state_at_version(account, base_version, false)?
                    .expect("Account not found")
            );
            let revision_annotation = format!(
                "{}",
                debugger
                    .annotate_account_state_at_version(account, revision, false)?
                    .expect("Account not found")
            );
            println!(
                "{}",
                Changeset::new(&base_annotation, &revision_annotation, "\n")
            );
        }
        Command::GetModules { version } => {
            let modules =
                debugger.get_diem_framework_modules_at_version(version, opt.save_write_sets)?;
            println!("Fetched {} modules", modules.len())
        }
        Command::BisectTransaction {
            sender,
            script_path,
            begin,
            end,
            rebuild_stdlib: reload_stdlib,
        } => println!(
            "{:?}",
            debugger.bisect_transactions_by_script(
                script_path.to_str().expect("Expect an str"),
                sender,
                begin,
                end,
                if reload_stdlib {
                    let mut change_set = ChangeSet::new();
                    for module in diem_framework::modules() {
                        let mut bytes = vec![];
                        module.serialize(&mut bytes)?;
                        change_set.publish_module(module.self_id(), bytes)?;
                    }
                    Some(change_set)
                } else {
                    None
                },
            )
        ),
    }
    Ok(())
}