import { u8aFixLength } from "https://deno.land/x/polkadot@0.2.19/util/u8a/index.ts";
Examples
import { u8aFixLength } from 'https://deno.land/x/polkadot@0.2.19/util/mod.ts';
u8aFixLength('0x12') // => 0x12
u8aFixLength('0x12', 16) // => 0x0012
u8aFixLength('0x1234', 8) // => 0x12