Recap

An indispensable refresher to Wallet Security Recap: Protecting Your Assets and Protocols - This lesson serves as a critical reminder for developers on securing digital assets and protocols, emphasizing the mandatory adoption of multisig wallets. You'll learn to implement core principles of private key hygiene, mitigate cloud storage risks, and prevent common security flaws like `.env` exposures.

Give us feedback

Web3 Wallet Security Advanced Web3 Wallet Security
1. A Message From Curve
Learn more about Curve Finance @ https://news.curve.finance/ Duration: 1min
2. Web3 Wallet Security Advanced Intro
A foundational overview to Navigating the Path to a Qualified Signer: An Introduction to Advanced Wallet Operations - This curriculum empowers aspiring Qualified Signers with critical skills for secure advanced wallet operations, emphasizing meticulous call data and signature verification. You'll master multi-sig environments, advanced signature schemes like EIP-712, and the importance of Solidity for confident asset management. Duration: 3min
3. Setting Up A Safe
An indispensable introduction to Securing Your Assets: A Practical Guide to Safe Multi-Signature Wallets - This lesson provides a step-by-step guide to creating and using Safe multi-signature wallets, from initial setup and owner configuration. You'll also learn to interact with dApps, execute transactions securely, and implement essential security best practices. Duration: 10min
4. Using Your Own Wallet
A cautionary exploration to Advanced Cryptocurrency Custody: The Risks and Rewards of Self-Rolled Wallet Solutions - This lesson explores self-rolled wallet solutions, a high-risk "Super Advanced" custody method, demanding profound expertise and extreme diligence. It covers custom key management motivations, diverse self-tooling approaches, and the severe consequences of errors. Duration: 1min
5. Wallet Private Key: Important Tips
A vital introduction to Mastering Private Key Hygiene: Your Guide to Secure Web3 Wallet Management - This lesson provides essential guidance on "Good Private Key Hygiene" to secure your Web3 wallet and crypto assets. It covers key practices like discreet wealth disclosure, safe hardware wallet sourcing, secure backups, and emergency responses to key compromise. Duration: 4min
6. Verify Multi Sig Less Technical
A practical walkthrough to Verifying a Multisig Wallet - Discover how to easily check if your multisig is configured correctly, without needing a technical background. This lesson provides peace of mind through a simple verification process. Duration: 10min
7. Verify MultiSig Signatures
An essential deep-dive into Secure Your Assets: Mastering Safe Multisig Transaction Verification - This lesson guides you through critical verification processes for Safe multisig transactions, emphasizing hardware wallet integrity and the `safe-tx-hashes` tool for independent checks. You'll master scrutinizing EIP-712 signatures and `execTransaction` call data, protecting your assets from costly UI/API attacks. Duration: 24min
8. Quiz 1 Quiz
Questions: 12
9. Case Study: ByBit Hack
A critical analysis to Unpacking the $1.4 Billion Bybit Hack: A Deep Dive into Multisig Security - This lesson examines the $1.4B Bybit hack, detailing the `delegatecall` exploit that compromised Safe multisig wallets. It underscores the vital role of rigorous hardware wallet verification and operational security in preventing such costly attacks. Duration: 15min
10. Safe EIP712 Signature Verification
A detailed guide to Verifying Safe Multi-Sig Transactions: Decoding EIP-712 Payloads - This lesson provides a practical walkthrough of scrutinizing Safe (Gnosis Safe) transaction signature requests via EIP-712. You'll master how to dissect domain and message components, decode call data, and verify every detail before signing. Duration: 6min
11. Quiz 2 Quiz
Questions: 10
12. Domain And Message Hash
A focused walkthrough to Streamlining Safe Wallet Security: Verifying Transactions with Domain and Message Hashes - This lesson provides a clear method for verifying Safe EIP-712 transactions using Domain and Message Hashes, helping overcome hardware wallet display challenges. You'll master independent hash calculation with tools like Wise Signer for enhanced transaction security. Duration: 3min
13. Recap
An indispensable refresher to Wallet Security Recap: Protecting Your Assets and Protocols - This lesson serves as a critical reminder for developers on securing digital assets and protocols, emphasizing the mandatory adoption of multisig wallets. You'll learn to implement core principles of private key hygiene, mitigate cloud storage risks, and prevent common security flaws like `.env` exposures. Duration: 2min

Course Overview

About the course

What you'll learn

Advanced transaction verification techniques

Set up and configuration of a Safe wallet multi-sig

EIP-712 structured data signatures

EIP-712 verification tools

To analyze real-world hacks and apply lessons

How to decode and verify complex transactions

Cyfrin Safe Hash

Safe TX Hashes Util

OpenZeppelin Safe Utils

Swiss Knife and Deth Calldata Decoders

Course Description

Who is this course for?

  • DAO treasury managers
  • Multi-sig signers
  • Blockchain and DeFi enthusiasts
  • Web3 Developers
  • Finance Professionals

Meet your instructors

Patrick Collins

Patrick Collins

Founder at Cyfrin

Web3 engineer, educator, and Cyfrin co-founder. Patrick's smart contract development and security courses have helped hundreds of thousands of engineers kickstarting their careers into web3.

Last updated on July 25, 2025