Sign-In with Ethereum¶

The wallet path on the Get Started page uses Sign-In with Ethereum (EIP-4361) to link your wallet address to your verified email.

What you sign¶

After you sign in with your email and connect your wallet, you're asked to sign a plain-text message like this:

animechain.dev wants you to sign in with your Ethereum account:
0xYourAddress...

Link this wallet to you@example.com for AnimeChain onboarding. This signature is stored only in your browser.

URI: https://animechain.dev/onboarding/
Version: 1
Chain ID: 69000
Nonce: 4f3c2a1b9d8e7f60aabb
Issued At: 2026-06-03T12:00:00.000Z

Signing this message:

Costs no gas — it's an off-chain signature, not a transaction.
Grants no permissions — it cannot move funds or approve tokens.
Proves ownership — only the holder of the wallet's private key can produce a valid signature, so the wallet ↔ email link is cryptographically attested.

What we store, and where¶

The record — your address, email, the message, and the signature — is currently stored only in your browser's localStorage. It is not sent to any server. You can inspect it under the "What was signed & where it lives" panel in the widget, and remove it any time with Unlink wallet (or by clearing site data).

Verifying the signature yourself¶

Anyone can verify the link without trusting us:

import { verifyMessage } from "ethers";

const { address, message, signature } =
  JSON.parse(localStorage.getItem("animechain.onboarding.siwe-link"));

console.log(verifyMessage(message, signature) === address); // true