pairl 1.5.0

PAIRL v1.5 reference implementation — parser, validator, canonicalizer, and renderer

pairl (Python)

Reference implementation of the PAIRL v1.5 protocol: parser, validator (rules V1–V12), canonicalizer + SHA-256 hashing, and a deterministic human-readable renderer. Pure standard library, no runtime dependencies.

Install

pip install -e impl/python      # from the repo root

Library

import pairl

msg = pairl.parse(open("message.pairl").read())

res = pairl.validate(msg)            # rules V1–V12
print(res.valid, res.errors, res.warnings)

print(pairl.compute_hash(msg))       # canonical SHA-256 (columnar-invariant)
print(pairl.render(msg))             # faithful human-readable rendering

Columnar blocks (#evid[claim,src,conf] + positional rows, §3.4) are parsed and expanded to their canonical #type key=value records, so a message hashes identically whether sent in columnar or key=value form (§9.4a).

CLI

python -m pairl validate [--strict] message.pairl
python -m pairl render   message.pairl
python -m pairl hash     message.pairl
python -m pairl canon    message.pairl

Test

cd impl/python && python -m unittest discover -s tests