Self-defense against scammers, directly in your wallet.
Blackbelt provides additional security-related information about the contract you are interacting with, in real-time, directly in your wallet. This is vital for improving the security of new and non-technical users.
We provide security assessments for smart contract interactions directly in metamask and on our website. The risk score is calculated in real-time based on on-chain data.
Furthermore, we experimented with a revert feature that transforms the transaction focused execution to 83C9 an intend focused value transfer. The feature uses a smart contract to check if the balance changes are in line with what is expected and reverts the transaction if the criteria is not fulfilled.
This was a prize-winning submission at ETHBogota (Pokt Network, MetaMask, IPFS, Polygon and Coinbase Cloud Prizes) and also at the MetaMask Snaps Sozu Haus in October 2022.
News: Metamask Blog Post, Nov 2022
Stack:
- Metamask snap
- Coinbase cloud Node for web3 data
- Etherscan API for contract information
- IPFS for storing security score computation information
- PocketNetwork node client
- Solidity and Polygon testnet to test our revert feature:
- https://mumbai.polygonscan.com/tx/0x990e5be972a7c79a700b97f72ba77df1ff934669c5bab1097243a01fd73194cc
- https://mumbai.polygonscan.com/tx/0x7d4931f717df02d7f64b6610552ffc56a87098921c3e5e99ac340c989e637cd5
- https://mumbai.polygonscan.com/tx/0xfbf941c560125e34edd2c072dcc1ada50f961d595fc48eab371246fddf6fc8fb
There are 3 scripts to run concurrently for the demo: back-end, front-end, and snap. Each is in its own folder. NOTE: Check that the ports for each server is different and the BACKEND_URL in the front-end demo is calling the correct endpoint based on the url the back-end generates.
Flask server for retrieving blockchain data and computing security score.
Usage:
- Create a python virtual environment (recommended)
- install requirements
pip install -r requirements.txt - add API keys to .env file
- run server
python app.py
Website to set up snaps and trial usage.
Usage:
npm installnpm start
Add the Blackbelt snap to metamask.
Usage:
- Follow instructions from the metamask snap template documentation.
Smart contracts for reverting transactions if intent not met.