12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152

import type { Registry } from 'https://deno.land/x/polkadot@0.2.33/types-codec/types/index.ts';import type { HexString } from 'https://deno.land/x/polkadot@0.2.33/util/types.ts';
import { isString, isU8a, u8aToU8a } from 'https://deno.land/x/polkadot@0.2.33/util/mod.ts';
import { MetadataVersioned } from './MetadataVersioned.ts';
const EMPTY_METADATA = new Uint8Array([0x6d, 0x65, 0x74, 0x61, 9]);
const VERSION_IDX = EMPTY_METADATA.length - 1;
/** @internal */function decodeU8a (registry: Registry, u8a: Uint8Array): MetadataVersioned | Uint8Array {  if (u8a.length === 0) {    return EMPTY_METADATA;  } else if (u8a[VERSION_IDX] === 9) {    // This is an f-ing hack as a follow-up to another ugly hack    // https://github.com/polkadot-js/api/commit/a9211690be6b68ad6c6dad7852f1665cadcfa5b2    // when we fail on V9, try to re-parse it as v10...    try {      return new MetadataVersioned(registry, u8a);    } catch {      u8a[VERSION_IDX] = 10;
      return u8a;    }  }
  return u8a;}
/** * @name Metadata * @description * The versioned runtime metadata as a decoded structure */export class Metadata extends MetadataVersioned {  constructor (registry: Registry, value?: Uint8Array | HexString | Map<string, unknown> | Record<string, unknown>) {    // const timeStart = performance.now()
    super(      registry,      isU8a(value) || isString(value)        ? decodeU8a(registry, u8aToU8a(value))        : value    );
    // console.log('Metadata', `${(performance.now() - timeStart).toFixed(2)}ms`)  }}