@polkadot/util
Version:
A collection of useful utilities for @polkadot
24 lines (23 loc) • 685 B
JavaScript
Object.defineProperty(exports, "__esModule", { value: true });
exports.compactAddLength = compactAddLength;
const index_js_1 = require("../u8a/index.js");
const toU8a_js_1 = require("./toU8a.js");
/**
* @name compactAddLength
* @description Adds a length prefix to the input value
* @example
* <BR>
*
* ```javascript
* import { compactAddLength } from '@polkadot/util';
*
* console.log(compactAddLength(new Uint8Array([0xde, 0xad, 0xbe, 0xef]))); // Uint8Array([4 << 2, 0xde, 0xad, 0xbe, 0xef])
* ```
*/
function compactAddLength(input) {
return (0, index_js_1.u8aConcatStrict)([
(0, toU8a_js_1.compactToU8a)(input.length),
input
]);
}
;