ECFC: Expected Consensus Finality Calculator

Python demonstrator of an algorithm to determine the probability bound for replacement of a Filecoin tipset given chain history.

The algorithm allows users to make decisions on transaction confirmation based on the actual content of the chain rather than on a fixed number of epochs. It can reduce the time to (soft) finality by one order of magnitude under normal operating conditions.

Background

FRC-0089: https://github.com/filecoin-project/FIPs/blob/master/FRCs/frc-0089.md

Requirements

Uses numpy, scipy, pandas, and matplotlib

Content

• finality_calc_validator.py: the EC Finality Calculator given full information available to nodes
• finality_calc_actor.py: experimental calculator in more restrictive actor context
• experiments/: evaluation code, data, and results

Usage

• Run finality_calc_validator.py to try the calculator on generated data
• Run experiments/experiments.py to try the calculator on simulation data and Filecoin chain traces
• Call finality_calc_validator() using your chosen data and parameters

License

Dual-licensed under MIT + Apache 2.0