fc-nmap 0.0.7

Farcaster network mapping

fc-nmap

THis software is still in alpha and under heavy development. Things will change and break.

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Quickstart

pip install fc-nmap

fc-nmap --help

Usage: fc-nmap [OPTIONS] COMMAND [ARGS]...

  Farcaster Network Mapper

Options:
  --version   Show the version and exit.
  -h, --help  Show this message and exit.

Commands:
  exportdb  Create a tab separated dump of the database
  initdb    Initialize the database
  scan      Scan will scan the network
  updatedb  Collect addtional information about each hub

scan will start from one hub, get its contact list and ask other hubs for their lists. Based on my tests so far, hops > 10 will make litte difference. Data collected is stored in a local sqlite3 db.

updatedb will collect additiona info.

dumpdb generates a text export.

Behind the scenes

fc-nmap initdb creates a local sqlite database where data is stored.

fc-nmap scan will start by asking a hub to provide its contact list (gRPC call GetCurrentPeers). Using this list, it will pick --hops hubs at random, and request their contact list too. The lists are combined and stored in the database.

fc-nmap updatedb --hub-info looks into the database and picks hubs that were recently active. (Recency is defined by comparing ContactInfoContentBody.timestamp collected when requesting the contacts lists and the current timestamp.) The command will try to connect to each one of the hubs, and collect additional info using GetInfo, and store the results in the local database.

fc-nmap updatedb --hub-location works similar to --hub-info, but uses ip2location.io to get location information about each hub IP. Again, information collected is stored in the local database. The script will not query ip2location for IPs that were looked up in the last 100 days. This helps staying within ip2location free plan limits.

fc-nmap export --report=all will export all "active" hubs. Use fc-nmap export --help` to get all the available exports/reports. Or connect directly to the local database (currently named hubs.db and stored in the directory where you called the previous commands) and run your own queries.

License

fc-nmap is distributed under the terms of the MIT license.