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import type { HexString } from 'https://deno.land/x/polkadot@0.2.40/util/types.ts';
import { u8aToU8a } from 'https://deno.land/x/polkadot@0.2.40/util/mod.ts';import { vrfVerify } from 'https://deno.land/x/polkadot@0.2.40/wasm-crypto/mod.ts';
const EMPTY_U8A = new Uint8Array();
/** * @name sr25519VrfVerify * @description Verify with sr25519 vrf verification */export function sr25519VrfVerify (message: HexString | Uint8Array | string, signOutput: HexString | string | Uint8Array, publicKey: HexString | Uint8Array | string, context: HexString | string | Uint8Array = EMPTY_U8A, extra: HexString | string | Uint8Array = EMPTY_U8A): boolean {  const publicKeyU8a = u8aToU8a(publicKey);  const proofU8a = u8aToU8a(signOutput);
  if (publicKeyU8a.length !== 32) {    throw new Error('Invalid publicKey, expected 32-bytes');  } else if (proofU8a.length !== 96) {    throw new Error('Invalid vrfSign output, expected 96 bytes');  }
  return vrfVerify(publicKeyU8a, u8aToU8a(context), u8aToU8a(message), u8aToU8a(extra), proofU8a);}