common/packages/util/docs/bn.md

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.

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'