function hexAddPrefiximport { hexAddPrefix } from "https://dotland.deno.dev/x/polkadot@0.2.35/util/hex/index.ts"; hexAddPrefix(value?: string | null): HexStringExamples import { hexAddPrefix } from 'https://deno.land/x/polkadot@0.2.35/util/mod.ts'; console.log('With prefix', hexAddPrefix('0a0b12')); // => 0x0a0b12 Parametersoptionalvalue: string | nullReturnsHexString