Hard scam filter

We've observed that 50% of tokens deployed on the blockchain contain functions within their contracts designed to scam investors (https://vision-scanner.com/app/).

Vision maintains an regularly updated database of scam signatures, enabling the immediate exclusion of such contracts upon display. This automatic filter allows investors to save time by focusing their attention only on contracts with sound foundations.

Our filter uses several techniques (ip blacklisted, regex, scam signature in contract, TokenSniffer API).

You can see hard scam filter in action for free in the Vision Basic Chan : https://t.me/VisionEthBot

The number 345 displayed (example M 345) corresponds to our scam signature number.

We also use server IP filtering. If too many scams appear on an IP, we blacklist it :

And finally we purchased a license of tokenSniffer API which improves our filtering :

There are 2 categories of scam:

• Hard scam: the deployer manipulates the contract to steal money from investors. This mainly concerns honey pot, delayed honey pot, wrong allowances, liquidity swap. These scams can be identified by analyzing the contract and these are the ones that we filter.

• Soft scam: we find scams where investors know the risk in advance: withdrawal of liquidity until they locks, change of tax and blacklisting of an address until they renounce. These cannot be detected in advance. This is why you will see a lot of rug pull after vision filtering.

For information, some contracts have hard scam functions but are never used by the owner! Either because the contract is performing well and the owner prefers to let it continue. Or because the owner simply copied and pasted a contract without knowing that it has a scam function inside! This happens very often.