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: off_chain.rs
    path of file: ./repos/fuel-core/crates/fuel-core/src/service/genesis
    
    the code of the file until where you have to start completion: use crate::{
    database::{
        database_description::off_chain::OffChain,
        Database,
    },
    graphql_api::worker_service,
    service::Config
    
fn process_coins(db: &Database<OffChain>, coins: Vec<CoinConfig>) -> anyhow::Result<()> {
    let mut database_transaction = Transactional::transaction(db);

    let coin_events = coins.iter().map(|config| {
        let coin = Coin {
            utxo_id: config.utxo_id(),
            owner: config.owner,
            amount: config.amount,
            asset_id: config.asset_id,
            tx_pointer: config.tx_pointer(),
        };
        Cow::Owned(Event::CoinCreated(coin))
    });

    worker_service::process_executor_events(coin_events, database_transaction.as_mut())?;

    database_transaction.commit()?;
    Ok(())
}