tokenlon-sdk/lib/utils/math.js

imToken Tokenlon API for node

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var utils_1 = require("@0xproject/utils");
var _ = require("lodash");
exports.isBigNumber = function (v) {
    return v instanceof utils_1.BigNumber ||
        (v && v.isBigNumber === true) ||
        (v && v._isBigNumber === true) ||
        false;
};
exports.isNumberLike = function (n) {
    // if use Number(n), 'toBN(-0xaa) will not pass this condition, will received only 0'
    // if you set params with empty string like ' ', it will return false, just like new BigNumber(' ') will throw error
    var num = parseFloat(n);
    return _.isNumber(num) && _.isFinite(num) && !_.isNaN(num);
};
exports.toBN = function (value) {
    value = value || 0;
    if (exports.isBigNumber(value)) {
        return value;
    }
    if (!exports.isNumberLike(value)) {
        return new utils_1.BigNumber(0);
    }
    if (_.isString(value) && ((value).indexOf('0x') === 0 || (value).indexOf('-0x') === 0)) {
        return new utils_1.BigNumber((value).replace('0x', ''), 16);
    }
    return new utils_1.BigNumber((value).toString(10), 10);
};
/**
 * Returns a string representing the value of this BigNumber in normal (fixed-point) notation rounded to dp decimal places using rounding mode rm.
 * @param  {Number} n
 * @param  {Number} dp [decimal places, 0 to 1e+9]
 * @param  {Number} rm [rounding modes 0 to 6, Default value: 1 ROUND_DOWN ] http://mikemcl.github.io/bignumber.js/#round
 * @return {String}
 */
exports.toFixed = function (n, dp, rm) {
    if (dp === void 0) { dp = 4; }
    if (rm === void 0) { rm = 1; }
    return exports.toBN(n).toFixed(dp, rm);
};
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