PrivETHy

Example page for an active address
PrivETHy page for a random address

Inspiration

Inspiration to this work was seeing how little people care about the digital footprint they leave behind for facebook and google, and combining that with the complexity of storing a private key: people will -- either out of negligence, ignorance or laziness -- not use multiple keys for different things. PrivETHy was built to show an unsuspecting user how much data they leave behind in public.

What it does

PrivETHy queries various datasets/APIs that already accumulated different pieces of information:

etherscan for transactions and smart contract code
thegraph for various datasets on tokens, DAOs, games, exchanges
the Ethereum BigQuery dataset for ERC20 ownership
the eth-contract-metadata node package for token symbols and icons

How I built it

PrivETHy was built on top of a boilerplate project for Svelte. The largest amount of work went into implementing the many graphql queries for thegraph and drawing a graph to show address relationships.

Challenges I ran into

There was no functioning graph library for Svelte, so I couldn't make use of the layout algorithms d3.js brings. Many hours were spent placing nodes on a circle and having them display the information.

Accomplishments that I'm proud of

This prototype already displays a lot of sensitive information for the right addresses. I am a bit hesitant to show my own address. Also, adding more data would not be much effort, although I heavily rely on projects having published their subgraph or other providers indexing the relevant data.

What I learned

Svelte is still fairly young, and therefore not ideal for building under time constraints. Building basic things such as a graph layout from scratch is not what hackathons are for.