weird-erc20

Tech stack & purpose

Weird ERC20 is a Solidity repository containing minimal example implementations of non-standard ERC20 tokens based on real tokens that have been exploited in the wild. The project addresses the problem domain of smart contract security, demonstrating how the loosely-defined ERC20 specification allows token implementations to violate expected behavior in ways that can compromise systems integrating with them. The repository serves as an educational and defensive resource for developers and auditors building smart contracts that interact with external ERC20 tokens, covering over twenty categories of unusual token behaviors including reentrancy, missing return values, transfer fees, pausability, blocklists, and metadata encoding anomalies.

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Contributors

• 
  dxo 37 commits · 291 followers
• 
  dxo 13 commits · 291 followers
• Shebin John3 commits
• plotchy2 commits
• Gas One Cent2 commits
• Hubert Ritzdorf2 commits
• engn33r1 commits
• leekt1 commits
• Simon Tan1 commits
• 
  t11s1 commits · 3,834 followers
• 
  livnev1 commits · 173 followers
• Rodrigo Herrera Itie1 commits
• 0xGorilla1 commits
• P124731 commits
• Ben Kremer1 commits
• SmilingHeretic1 commits
• stiefn1 commits
• GianfrancoBazzani1 commits
• Krum1 commits