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siwe-frontend-debug

Debugs Sw/WE-style frontend sign-in flows by verifying message consistency across steps.

Updated Jan 14, 2026
Search Tags:#debugging#authentication#frontend#signature#siwe#SIWE parsing
One-click install
npx skills add https://github.com/proofoftom/waap-drupal --skill siwe-frontend-debug
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: siwe-frontend-debug
Source: https://github.com/proofoftom/waap-drupal/tree/main/.claude/skills/siwe-frontend-debug
Command: npx skills add https://github.com/proofoftom/waap-drupal --skill siwe-frontend-debug

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

This Skill helps developers diagnose and fix frontend SIWE (Sign-In with Ethereum) authentication issues, including signature problems, address mismatches, and unstable UI states during sign-in flows.

Core Features & Use Cases

  • Guided debugging patterns for common SIWE issues (message regeneration, UI reset on cancel, SIWE parsing edge cases, EIP-155 handling).
  • Practical fixes and code examples for ensuring the same signed message is used, distinguishing cancellation from errors, and normalizing signatures for wallet SDKs.
  • Tooling and detection tips to reproduce and verify fixes across frontend and backend verification steps.

Quick Start

Read this guide and apply the recommended debugging steps to an existing SIWE login flow; start by verifying that the exact same message is signed and forwarded to backend verification, then check cancellation handling and parser correctness.

Frequently Asked Questions about siwe-frontend-debug

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

FAQPage Schema
Why does SIWE frontend authentication fail with signature verification mismatches?▼

SIWE authentication fails when the exact signed message is not used throughout the login flow. You must log and compare the message, nonces, and responses across frontend and backend to ensure the identical message is forwarded for verification.

How do I fix UI state bugs when a user cancels an Ethereum wallet signature request?▼

To fix UI state bugs during wallet-based authentication, you must distinguish signature cancellation from actual errors. Properly handling cancellation events resets the UI state instead of triggering error logging.

What is the best way to resolve address mismatches in a Sign-In with Ethereum flow?▼

Resolving address mismatches requires normalizing the EIP-155 recovery ID and verifying the exact signed message. Logging the signed payload and comparing it against backend verification responses pinpoints where the address divergence occurs.

How do I handle SIWE parsing errors during frontend wallet login?▼

Handle SIWE parsing errors by applying guided debugging patterns to identify edge cases in message generation. Verify that the parser correctly reads the structured SIWE message before forwarding it to backend verification.

Does my wallet SDK need EIP-155 recovery ID normalization for SIWE authentication?▼

Yes, normalizing the EIP-155 recovery ID is required for wallet SDKs to ensure signatures match across different chains. This normalization prevents verification failures when the frontend and backend interpret the signature differently.

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