How can i change implementation of Wallet.fromEncryptedJson?

[andra961]

Hi everyone!It's a known problem that fromEncryptedJson() method is slow on ReactNative, because its bottle neck is the js implementation of scrypt. Basically i want to replace in keystore.ts line 183 with the native scrypt implementation of react-native-scrypt, which should be faster. I have never edited a node_module by myself and i notice that changing the typescript file doesn't do anything, i guess it needs to be recompiled. I managed to see changes by changing keystore.js in the lib folder, which is pretty ugly file and i guess it is the compiled version or something. Of course trying to change implementation this way would be very hard for a noob like me. Could someone please tell me the steps to make changes in the keystore.ts file actually effective?

[zemse]

You don't need to update node modules, in your project you can just extend the class. And import this file everywhere you are using wallet and use the WalletModified instead.

// create a wallet-modified.ts
class WalletModified extends Wallet {
  static fromEncryptedJson(json: string, password: Bytes | string, progressCallback?: ProgressCallback): Promise<Wallet> {
    // your implementation
  }
}

// in your other files
import { WalletModified as Wallet } from '../utils/wallet-modified.ts';

// code
Wallet.fromEncryptedJson(..)