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    use clap::ArgMatches;
    use sync::{create_sync_blocks_writer, Error};
    use config::Config;
    use util::init_db;

    pub fn import(cfg: Config, matches: &ArgMatches) -> Result<(), String> {
    	try!(init_db(&cfg));

    	let blk_path = matches.value_of("PATH").expect("PATH is required in cli.yml; qed");

    	let mut writer = create_sync_blocks_writer(cfg.db, cfg.consensus, cfg.verification_params);

    	let blk_dir = try!(::import::open_blk_dir(blk_path).map_err(|_| "Import directory does not exist".to_owned()));
    	let mut counter = 0;
    	for blk in blk_dir {
    		// TODO: verify magic!
    		let blk = try!(blk.map_err(|_| "Cannot read block".to_owned()));
    		match writer.append_block(blk.block) {
    			Ok(_) => {
    				counter += 1;
    				if counter % 1000 == 0 {
    					info!(target: "sync", "Imported {} blocks", counter);
    				}
    			}
    			Err(Error::TooManyOrphanBlocks) => return Err("Too many orphan (unordered) blocks".into()),
    			Err(_) => return Err("Cannot append block".into()),
    		}
    	}

    	info!("Finished import of {} blocks", counter);

    	Ok(())
    }

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