@polkadot/util
Version:
A collection of useful utilities for @polkadot
17 lines (16 loc) • 460 B
TypeScript
import type { HexString } from '../types.js';
/**
* @name hexHasPrefix
* @summary Tests for the existence of a `0x` prefix.
* @description
* Checks for a valid hex input value and if the start matched `0x`
* @example
* <BR>
*
* ```javascript
* import { hexHasPrefix } from '@polkadot/util';
*
* console.log('has prefix', hexHasPrefix('0x1234')); // => true
* ```
*/
export declare function hexHasPrefix(value?: string | null): value is HexString;