Yashotantra Academy logo
← React Native theorytheory 0/50 · 0%
level 1
Curious · 0 XP
streak
0d
perfect
0
badges
0

100 XP to Apprentice

Storage · easy

14. AsyncStorage and persistence

Key-value storage across app launches.

1 min read3 questionsup to 50 XPtopic 14/50

Read in another language

AI translates the explanation and quiz text while preserving code and answer scoring.

`@react-native-async-storage/async-storage` provides a simple, asynchronous key-value store persisted on disk — good for caching non-sensitive data like a selected chain or theme preference.

import AsyncStorage from "@react-native-async-storage/async-storage";

async function saveChain(chainId: number) {
  await AsyncStorage.setItem("chainId", String(chainId));
}

async function loadChain(): Promise<number | null> {
  const v = await AsyncStorage.getItem("chainId");
  return v ? Number(v) : null;
}

Never store a private key or seed phrase in AsyncStorage — it is unencrypted. Use `react-native-keychain` or a secure enclave-backed library for secrets.

How to study this topic

  1. 1. Read the explanation once end to end, skipping the code.
  2. 2. Re-read the code snippets and say out loud what each line does.
  3. 3. Answer the quiz without scrolling back — that is the real check.
  4. 4. Read every explanation, even for the answers you got right.

Scoring

  • · Up to 30 XP from quiz accuracy.
  • · +15 XP for a perfect first attempt.
  • · +5 XP while a 3-day streak is running.
  • · 75% or higher marks the topic complete.

Check your understanding

  1. 1. Is AsyncStorage encrypted?

  2. 2. What should you use to store a wallet private key?

  3. 3. What kind of API does AsyncStorage expose?

Badges

First light
Pass your first topic
Sharp shooter
3 perfect first-try quizzes
On a roll
Study 3 days in a row
Week warrior
Study 7 days in a row
Grinder
Earn 500 XP
Deep diver
Earn 1500 XP