@polkadot/util
Version:
A collection of useful utilities for @polkadot
24 lines (23 loc) • 868 B
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.numberToHex = numberToHex;
const fixLength_js_1 = require("../hex/fixLength.js");
/**
* @name numberToHex
* @summary Creates a hex value from a number.
* @description
* `null`/`undefined`/`NaN` inputs returns an empty `0x` result. `number` input values return the actual bytes value converted to a `hex`. With `bitLength` set, it converts the number to the equivalent size.
* @example
* <BR>
*
* ```javascript
* import { numberToHex } from '@polkadot/util';
*
* numberToHex(0x1234); // => '0x1234'
* numberToHex(0x1234, 32); // => 0x00001234
* ```
*/
function numberToHex(value, bitLength = -1) {
const hex = (!value || Number.isNaN(value) ? 0 : value).toString(16);
return (0, fixLength_js_1.hexFixLength)(hex.length % 2 ? `0${hex}` : hex, bitLength, true);
}