Jaco Greeff
e832aebb07
* Add toU8a conversions * Add u8a utilities * @polkadot/rlp with encoding * Decoding test runthrough * Update util locations * Convert util-triehash to use util-rlp * Allow keccak from Uint8Array * Pass Uint8Array to keccak input * Update documentation * Skip some doc generation * Update @polkadot/dev * Update doc typo * Update allocations * Retrieve tests from ethereumjs-testing * Simplify test retrieval * Exclude etereumjs-testing from flow
1.1 KiB
1.1 KiB
bn
Utility methods to convert to and from BN objects
- bnFromHex Creates a BN.js bignumber object from a hex string.
- bnToHex Creates a hex value from a BN.js bignumber object.
- bnToU8a Creates a Uint8Array object from a BN.
bnFromHex
Creates a BN.js bignumber object from a hex string. (alias of hexToBn)
bnFromHex (value?: string): BN
bnToHex
Creates a hex value from a BN.js bignumber object.
bnToHex (value?: BN): string
null inputs returns a 0x result, BN values return the actual value as a 0x prefixed hex value. Anything that is not a BN object throws an error.
import BN from 'bn.js';
import { bnToHex } from '@polkadot/util';
bnToHex(new BN(0x123456)); // => '0x123456'
bnToU8a
Creates a Uint8Array object from a BN.
bnToU8a (value?: BN): Uint8Array
null/undefined/NaN inputs returns an empty Uint8Array result. BN input values return the actual bytes value converted to a Uint8Array.
import { bnToU8a } from '@polkadot/util';
bnToU8a(new BN(0x1234)); // => [0x12, 0x34]