Skip to content

fix(docs): warn that client-side SIWE nonce provides no replay protection #1722

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
Kewe63 wants to merge 1 commit into
base: master
Choose a base branch
from
Open

fix(docs): warn that client-side SIWE nonce provides no replay protection #1722

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 4 additions & 0 deletions docs/apps/guides/migrate-to-standard-web-app.mdx
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -99,6 +99,10 @@ Your app uses the Farcaster SDK. The migration replaces Farcaster-specific auth,
<Step title="Replace auth and identity">
Farcaster sign-in and FID-based identity are not available in the Base App. Replace them with [SIWE](https://viem.sh/docs/siwe/utilities/createSiweMessage) for authentication and the connected wallet address for user identity.

<Warning>
The example below generates the SIWE nonce in the browser with `generateSiweNonce()`. A client-issued nonce provides **no replay protection**: any attacker who captures a valid SIWE message + signature pair can replay it against your server, because the server has no record of which nonces it issued. Only use this pattern if your app does not require server-side sessions or replay protection. For verified, server-issued nonces, follow the [Authenticate users](/base-account/guides/authenticate-users) guide and confirm nonces server-side before accepting the SIWE message.
</Warning>

Build, sign, and verify the SIWE message:

```tsx SignIn.tsx lines expandable wrap highlight={1,9,14-18,33-34}
Expand Down