Safely integrating with ERC20 tokens

title	Safely integrating with ERC20 tokens
date	2021
authors	Josselin Feist
conference	Hello Security 2021
resources	label path Slides safely_integrating_erc20.pdf label url Recording https://www.crowdcast.io/e/hello-security-audit/3 label url Building Secure Contracts https://github.com/crytic/building-secure-contracts label url Token Integration Checklist https://github.com/crytic/building-secure-contracts/blob/master/development-guidelines/token_integration.md

DeFi smart contracts are financial applications that interact with arbitrary ERC20 tokens. Many risks associated with these interactions are not well-known and can lead to severe security issues. The goal of this presentation is to increase awareness of these risks and present guidelines to follow.

Takeaways

• Interacting with external ERC20 tokens come with risks
• The token integration checklist will help you to evaluate these risks
• Slither's printers, slither-check-erc, and slither-prop will help you to review external contracts