Does not work with permit().

[ytrezq]

Some tokens allow to record approval amount using permit which in return is used by some exchanges which use relayers where the user send a signature in a web portal without getting even appearing in the transaction trace.

The tool currently works through scanning transaction history of the address to check but we should (possibly using Google s BigQuery public dataset) switch to full log approval scanning of the whole Ethereum blockchain.

[TripleSpeeder]

Need to investigate what is the best approach to handle this.