bfx-api-node-models/lib/validators/string.js

Object models for usage with the Bitfinex node API

'use strict'

const _includes = require('lodash/includes')
const _isString = require('lodash/isString')

/**
 * Validates a string
 *
 * @param {*} v - value
 * @param {string[]} validOptions - optional
 * @returns {string} error - null if valid
 */
module.exports = (v, validOptions) => (
  !_isString(v) || (validOptions && !_includes(validOptions, v))
    ? 'must be a string'
    : null
)