Jaco Greeff
b5c5734c7c
* Initial split of util & util-crypto * Add initial XXHash version * Blake2s wit tests & documentation * Add sha512 (from NaCl) * Add randomBytes (from NaCl) * Flow fixes * Update documentation * Update latest @polkadot/dev
1.6 KiB
1.6 KiB
u8a
Utility methods to convert to and from Uint8Array objects
- u8aFromBuffer Creates a Uint8Array value from a Buffer object.
- u8aFromUtf8 Creates a Uint8Array object from a utf-8 string.
- u8aToBuffer Creates a Buffer object from a hex string.
- u8aToUtf8 Creates a utf-8 string from a Uint8Array object.
u8aFromBuffer
Creates a Uint8Array value from a Buffer object. (alias of bufferToU8a)
u8aFromBuffer (value?: Buffer): number
u8aFromUtf8
Creates a Uint8Array object from a utf-8 string.
u8aFromUtf8 (value?: string): UInt8Array
String input values return the actual encoded UInt8Array. null or undefined values returns an empty encoded array.
import { u8aFromUtf8 } from '@polkadot/util';
u8aFromUtf8('hello'); // [0x68, 0x65, 0x6c, 0x6c, 0x6f]
u8aToBuffer
Creates a Buffer object from a hex string.
u8aToBuffer (value?: UInt8Array): Buffer
null inputs returns an empty Buffer result. UInt8Array input values return the actual bytes value converted to a Buffer. Anything that is not a UInt8Array throws an error.
import { u8aToBuffer } from '@polkadot/util';
console.log('Buffer', u8aToBuffer('0x123480001f'));
u8aToUtf8
Creates a utf-8 string from a Uint8Array object.
u8aToUtf8 (value?: UInt8Array): string
UInt8Array input values return the actual decoded utf-8 string. null or undefined values returns an empty string.
import { u8aToString } from '@polkadot/util';
u8aToUtf8(new Uint8Array([0x68, 0x65, 0x6c, 0x6c, 0x6f])); // hello