Revery isWasmOnly helper (#1229)

* Revery isWasmOnly helper

* Adjust

packages/util-crypto/src/scrypt/encode.ts

@@ -7,9 +7,8 @@ import type { Params } from './types';
 import scryptsy from 'scryptsy';
 
 import { bufferToU8a, u8aToBuffer, u8aToU8a } from '@polkadot/util';
-import { scrypt } from '@polkadot/wasm-crypto';
+import { isReady, scrypt } from '@polkadot/wasm-crypto';
 
-import { isWasmOnly } from '../helpers';
 import { randomAsU8a } from '../random/asU8a';
 import { DEFAULT_PARAMS } from './defaults';
 
@@ -22,7 +21,7 @@ interface Result {
 export function scryptEncode (passphrase?: HexString | Uint8Array | string, salt = randomAsU8a(), params = DEFAULT_PARAMS, onlyJs?: boolean): Result {
   const u8a = u8aToU8a(passphrase);
 
-  const password = isWasmOnly(onlyJs)
+  const password = !onlyJs && isReady()
     ? scrypt(u8a, salt, Math.log2(params.N), params.r, params.p)
     : bufferToU8a(
       scryptsy(u8aToBuffer(u8a), u8aToBuffer(salt), params.N, params.r, params.p, 64)