A Beginners Guide to Forensic Research on FOAM


Hi All, as per request by @jazzhands here is an initial guide to getting started with Forensic Research on FOAM so you can draw your own conclusions.

To start, click a point that has been challenged on the map and click the address:

This will show you which address added the point. You can look up that address on the leaderboard to learn more about the Cartographer.

Right now, the challenge transaction does not appear to be on card, but you can find it in the daily digest:

This Etherscan link will bring you to the challenge transaction:

So now we know the challenger: 0x869daaa8257abbba3471a909cfa9c728be4d82f4

On etherscan, go to the challenger address and hit the ERC-20 tab. Go back to see when the first time they received FOAM.

Here we can see that this account received FOAM tokens from the token sale contract, so it is an original Cartographer.

You can also dig deeper and see that this account has spilt their tokens into different wallets that are participating in the map as well as transferred tokens to exchanges, likely to sell or more so to hide their address when sending to a new account that will be challenging and voting/

I hope to see all this info streamlined in the new curator tool page, which it sounds like it will.


Thanks very much for this, @GeoPeter. The tools are going to be great. I knew most of this, but at some point real life always intervenes and I get lazy.

Because sybil attacks are very difficult to track if the challenger is at all sophisticated, I think that we will continue to see POI stakes decrease in response to the threat these attacks represent.

I’m still worried about an automated attack, but barring that, I think we are about to see the number of challenges diminish as the supply of large-stake POIs dries up.


Supply of high stake POIs can only go down for 2 reasons:

  1. Challenges successful; or
  2. Challenges failed and the POI owners reduce the stakes.

I would urge owners to reduce their stake quickly. Like the DIA owner, for example.


Additionally you can use services like

or a Telegram bot @tracktxbot to track Address/Contract Transactions that happen real time :wink:

That’s what I personally do to keep track of my own Address and a few addresses of interest.

I imagine someone could follow a few addresses and vote when they do etc but you wouldn’t know which option they voted on however until the voting period ends and its the reveal phrase.



Hope this was helpful until our Curator tools are upgraded. :crossed_swords: d


I’d also suggest checking out http://bloxy.info Pretty cool stats that can be found, probably the best Ethereum Explorer for Analytics I’ve played around with.


FOAM Token

FOAM Registry

Small example of what analytics is shown :