Customized ERC20 API Implementation

This project implements a customized ERC20 API demo, Which tries to deal with 2 problems of ERC20 standard,

1. Security of approve/transfer_from methods, https://docs.google.com/document/d/1YLPtQxZu1UAvO9cZ1O2RPXBbT0mooh4DYKjA_jp-RLM/edit

2. Token lost problem when wrongly using transfer method, see

   • Critical problems of ERC20 token standard
   • ERC20_token_standard_vulnerability_classification.md
   • Ethereum Tokens: ERC 20 vs. ERC 223 vs. ERC 777
   • ERC777 — Is the new token standard replacing the ERC20?

Status

• problem1
• problem2