@polkadot/util
Version:
A collection of useful utilities for @polkadot
17 lines (16 loc) • 622 B
TypeScript
/**
* @name hexToU8a
* @summary Creates a Uint8Array object from a hex string.
* @description
* `null` inputs returns an empty `Uint8Array` result. Hex input values return the actual bytes value converted to a Uint8Array. Anything that is not a hex string (including the `0x` prefix) throws an error.
* @example
* <BR>
*
* ```javascript
* import { hexToU8a } from '@polkadot/util';
*
* hexToU8a('0x80001f'); // Uint8Array([0x80, 0x00, 0x1f])
* hexToU8a('0x80001f', 32); // Uint8Array([0x00, 0x80, 0x00, 0x1f])
* ```
*/
export declare function hexToU8a(value?: string | null, bitLength?: number): Uint8Array;