laconic-wallet/utils.ts

import '@ethersproject/shims';

import { Wallet, utils } from 'ethers';
import { HDNode } from 'ethers/lib/utils';
import { Alert } from 'react-native';
import { getGenericPassword, setGenericPassword } from 'react-native-keychain';

const generateWallet = async () => {
  try {
    const mnemonic = utils.entropyToMnemonic(utils.randomBytes(32));
    const hdNode = HDNode.fromMnemonic(mnemonic);
    await setGenericPassword(mnemonic, hdNode.privateKey);
    Alert.alert('Wallet stored successfully with address:', hdNode.address);
  } catch (error) {
    console.error('Error creating wallet ', error);
  }
};

const signMessage = async (message: string) => {
  try {
    const creds = await getGenericPassword();
    const wallet = creds && new Wallet(creds.password);
    const signature = wallet && (await wallet.signMessage(message));
    if (typeof signature === 'string') {
      Alert.alert('Message signed successfully with signature', signature);
    } else {
      Alert.alert('Message signing failed. Please try again.');
    }
  } catch (error) {
    console.error('Error signing transaction ', error);
  }
};

export { generateWallet, signMessage };