Method wrap

src/Chain.js:459–470

* Wraps value inside a chain object if it is not already a chain. * @param {?number[]|string|Uint8Array|Chain} value * @param {string} [encoding='utf8'] Byte encoding * @return {Chain}

(value, encoding = 'utf8')

   * @return {Chain}
   */
  static wrap (value, encoding = 'utf8') {
    if (value instanceof Chain) {
      // nothing to do, value already is a chain object
      return value
    }
    if (value === null || value.length === 0) {
      // use empty chain constant when possible
      return Chain.empty()
    }
    // create new chain object
    return new Chain(value, encoding)
  }

  /**
   * Joins all elements of an array (or an array-like object) into a chain.