impl<T: Database + DatabaseCommit> DatabaseCommitExt for T {
    // default implementation
}

/// EVM database commit interface.
pub trait DatabaseCommitExt: Database + DatabaseCommit {
    /// Iterates over received balances and increment all account balances.
    ///
    /// Update will create transitions for all accounts that are updated.
    fn increment_balances(
        &mut self,
        balances: impl IntoIterator<Item = (Address, u128)>,
    ) -> Result<(), Self::Error> {
        // Make transition and update cache state
        let balances = balances.into_iter();
        let mut transitions = HashMap::with_capacity(balances.size_hint().0);
        for (address, balance) in balances {
            if balance == 0 {
                continue;
            }
            let mut original_account = match self.basic(address)? {
                Some(acc_info) => Account::from(acc_info),
                None => Account::new_not_existing(0),
            };
            original_account.info.balance = original_account
                .info
                .balance
                .saturating_add(U256::from(balance));
            original_account.mark_touch();
            transitions.insert(address, original_account);
        }
        self.commit(transitions);
        Ok(())
    }
}