• Warnet
• SimLN
• Scaling Lightning
• Polar
  • Good for teaching because of the GUI

• What's best for research/writing papers
• Pressing issue: padding

Are there any frameworks for PCN besides LN?

• Sprites (?) - Patrick McCory paper
  • Master smart contract
  • Doesn't have the increasing time lock issue that LN does

• Helm, k8s: Launches a p2p network of core nodes with LN nodes attached
  • Hundreds of nodes
  • Imports “neighborhood” of the mainnet LN graph
  • Potential use case: more than one LN node per BTC node
    • Or Electrum or Neutrino
• Documentation is OK, can also be a service
• Internet connection adjustments at the network level:
  • Netem
  • Most realistic simulation includes traffic patterns, geolocation, latency, etc.
• Can run locally with Minikube or Docker Desktop
• IsRoutable() hack for Bitcoin Core to gossip addresses

• Handles payments between nodes and channels
• Orchestrates nodes to work with Warnet
• Supports defined activity vs random activity
• Not for specific attacks, more for background noise. Attacks carried out by separate processes
• Possible to spin up two clusters and connect nodes such that every link goes across the internet between clusters

PlanetLab

• Universities host machines locally, offering a slice of every machine worldwide
• Used for networking experiments (low CPU availability)

TransitPortal

• Geographic distribution
• Includes an AS to the internet for attack experiments

Shadow

• Tor simulator

• Support for laptop use cases
• Multiple LN nodes per Bitcoin Core backend
  • Regtest Core nodes
• Private channels
• NetworkX graph models
• Customizable interface for many nodes with opinionated defaults
• High-frequency LN payments for stress testing
• SimLN: Mix random and preset payment activity
• More client versatility:
  • Clients that change payloads
  • Use local images with attack mods
• How do we measure "emergent properties" (hard to define)
• Support for: CLN, Eclair, LDK

• Model activity from other payment networks (e.g., LTC from a few years ago) onto LN
  • Roles like payment processors, users, sinks, faucets, etc.
  • Sender/receiver profiles
  • Could be run in multiple Warnet scenarios
• Long-Term Simulations
  • A different simulation class; would not rely on k8s clusters
• Bitcoin Network Topology
  • Simulate with node birth/death over time, fast forward to observe results

• “Vuvuzela”: Send all messages to all neighbors
• Gossip messages look different than payment messages