ADD: security alert

BlueApp.js

@@ -24,6 +24,8 @@ async function startAndDecrypt(retry) {
     console.log('loaded from disk');
     EV(EV.enum.WALLETS_COUNT_CHANGED);
     EV(EV.enum.TRANSACTIONS_COUNT_CHANGED);
+    let securityAlert = require('./security-alert');
+    await securityAlert.start();
     // now, lets try to fetch balance and txs for first wallet if it is time for it
     let hadToRefresh = false;
     let noErr = true;

security-alert.js

@@ -0,0 +1,24 @@
+import { AsyncStorage, Alert } from 'react-native';
+
+async function start() {
+  const key = 'security_alert_num_times';
+  let times = await AsyncStorage.getItem(key);
+  times = times || 0;
+
+  console.log({ times });
+
+  if (times < 3) {
+    Alert.alert(
+      'Security alert',
+      'If you used BlueWallet prior to version 3.1.0 you are advised to re-create wallets ' +
+        'and transfer all funds from old wallets to new ones, as older versions might have security issues',
+      [
+        { text: 'Remind me later', onPress: () => AsyncStorage.setItem(key, '0') },
+        { text: 'Ok', onPress: () => AsyncStorage.setItem(key, parseInt(times) + 1 + '') },
+      ],
+      { cancelable: false },
+    );
+  }
+}
+
+module.exports.start = start;