'use strict'
const { Order } = require('bfx-api-node-models')
const _isFinite = require('lodash/isFinite')
const _includes = require('lodash/includes')
/**
* Verifies that a parameters Object is valid, and all parameters are within
* the configured boundaries for a valid Icberg order.
*
* Part of the `meta` handler section.
*
* @memberOf module:Iceberg
* @param {object} args - incoming parameters
* @param {number} args.amount - total order amount
* @param {number} args.sliceAmount - iceberg slice order amount
* @param {number} [args.sliceAmountPerc] - optional, slice amount as % of total amount
* @param {boolean} args.excessAsHidden - whether to submit remainder as a hidden order
* @param {string} args.orderType - LIMIT or MARKET
* @param {number} [args.submitDelay] - in ms, default 1500
* @param {number} [args.cancelDelay] - in ms, default 5000
* @returns {string} error - null if parameters are valid, otherwise a
* description of which parameter is invalid.
*/
const validateParams = (args = {}) => {
const {
price, amount, sliceAmount, orderType, submitDelay, cancelDelay, lev,
_futures
} = args
if (!Order.type[orderType]) return `Invalid order type: ${orderType}`
if (!_isFinite(amount)) return 'Invalid amount'
if (!_isFinite(sliceAmount)) return 'Invalid slice amount'
if (!_isFinite(submitDelay) || submitDelay < 0) return 'Invalid submit delay'
if (!_isFinite(cancelDelay) || cancelDelay < 0) return 'Invalid cancel delay'
if (!_includes(orderType, 'MARKET') && (isNaN(price) || price <= 0)) {
return 'Invalid price'
}
if (
(amount < 0 && sliceAmount >= 0) ||
(amount > 0 && sliceAmount <= 0)
) {
return 'Amount & slice amount must have same sign'
}
if (_futures) {
if (!_isFinite(lev)) return 'Invalid leverage'
if (lev < 1) return 'Leverage less than 1'
if (lev > 100) return 'Leverage greater than 100'
}
return null
}
module.exports = validateParams