siwe

Implement SIWE authentication with nonce generation, message verification, and encrypted cookie sessions.

Updated Mar 19, 2026
One-click install
npx skills add https://github.com/involvex/aetheris --skill siwe-involvex
Or copy as Structured Prompt for Agent
Please help me install this Agent Skill.
Skill: siwe
Source: https://github.com/involvex/aetheris/tree/main/.agents/skills/siwe
Command: npx skills add https://github.com/involvex/aetheris --skill siwe-involvex

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Sign-In with Ethereum (SIWE) authentication for Scaffold-ETH 2 projects replaces passwords with wallet-based login, enabling secure user sessions driven by cryptographic signatures.

Core Features & Use Cases

  • Nonce-based SIWE flow: generate a nonce, create a SIWE message, have the user sign it, and verify on the server to establish a session.
  • ERC-6492-compatible verification using Viem utilities to support smart wallets and on-chain validation.
  • Encrypted cookie-based sessions with iron-session, including domain validation to prevent replay and cross-site issues.
  • Typical SE-2 scenarios include user login, cross-wallet authentication, and persistent user sessions across frontend-backend stacks.

Quick Start

Integrate SIWE by following the steps to generate a nonce, construct a SIWE message, sign with the wallet, and verify to establish a session.

Frequently Asked Questions about siwe

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I implement Sign-In with Ethereum authentication in Scaffold-ETH 2?

Sign-In with Ethereum authentication in Scaffold-ETH 2 is implemented by generating a nonce, creating a SIWE message for the user to sign, and verifying the signature on the server to establish an encrypted cookie session.

Does SIWE authentication support smart contract wallets using Viem?

Yes, SIWE authentication supports smart contract wallets through ERC-6492-compatible verification using Viem utilities, enabling on-chain validation and signature verification for smart wallet users.

What is the best way to handle wallet-based login sessions in a Web3 application?

Wallet-based login sessions in a Web3 application are best handled by replacing passwords with cryptographic signature verification, establishing secure, persistent user sessions driven by nonce-based SIWE flows.

Can I use iron-session for Web3 session management with Ethereum wallets?

Yes, you can use iron-session for Web3 session management with Ethereum wallets to securely persist authenticated user sessions via encrypted cookies after verifying the SIWE message signature.

Why does Sign-In with Ethereum require nonce generation before signing?

Sign-In with Ethereum requires nonce generation before signing to prevent replay attacks, ensuring each authentication request is unique and securely tied to a specific domain and session.