@owstack/wallet-service/base-service/lib/lock.js

A service for multisignature HD wallets

const Errors = require('./errors/errordefinitions');
const LocalLock = require('./locallock');
const log = require('npmlog');
const RemoteLock = require('locker');
const $ = require('preconditions').singleton();

log.debug = log.verbose;
log.disableColor();

class Lock {
    constructor(opts) {
        opts = opts || {};
        if (opts.lockerServer) {
            this.lock = new RemoteLock(opts.lockerServer.port, opts.lockerServer.host);

            log.info(`Using locker server:${  opts.lockerServer.host  }:${  opts.lockerServer.port}`);

            this.lock.on('reset', function () {
                log.debug('Locker server reset');
            });
            this.lock.on('error', function (error) {
                log.error('Locker server threw error', error);
            });
        } else {
            this.lock = new LocalLock();
        }
    }
}

Lock.prototype.runLocked = function (token, cb, task) {
    $.shouldBeDefined(token);

    this.lock.locked(token, 5 * 1000, 5 * 60 * 1000, function (err, release) {
        if (err) {
            log.error(`Locker error: ${err}`);
            return cb(Errors.WALLET_LOCKED);
        }
        const _cb = function () {
            cb.apply(null, arguments);
            release();
        };
        task(_cb);
    });
};

module.exports = Lock;