Web4-Core Python Bindings

Python bindings for the Web4 trust-native infrastructure core library, implemented in Rust via PyO3.

Installation

From source (requires Rust and maturin)

pip install maturin
cd web4-core/python
maturin develop

Building a wheel

maturin build --release
pip install target/wheels/*.whl

Usage

import web4_core

# 1. Create an LCT (in-memory primitive)
lct, keypair = web4_core.PyLct.new(web4_core.PyEntityType.Human, None)

# 2. Anchor to a ledger — LCTs are blockchain tokens, must be minted
ledger = web4_core.PyInMemoryLedger()
receipt = ledger.mint(lct)
print(f"Minted at index {receipt.entry_index}, hash {receipt.entry_hash[:16]}...")

# 3. Sign and verify
message = b"Hello, Web4!"
signature = keypair.sign(message)
assert lct.verify_signature(message, signature)

# 4. Generate proof of existence
proof = ledger.anchor(lct.id)
assert ledger.verify_proof(proof)

# 5. Trust tensor — 3 root dimensions, fractally extensible
trust = web4_core.PyT3()
trust.observe(web4_core.PyTrustDimension.Talent, 0.9)
trust.observe(web4_core.PyTrustDimension.Training, 0.85)
trust.observe(web4_core.PyTrustDimension.Temperament, 0.88)
print(f"Aggregate trust: {trust.aggregate():.3f}")

# Fractal sub-dimension observation
trust.observe_sub_dimension("rust_proficiency", web4_core.PyTrustDimension.Training, 0.92)

# 6. Value tensor — same pattern
value = web4_core.PyV3()
value.observe(web4_core.PyValueDimension.Valuation, 0.9)
value.observe(web4_core.PyValueDimension.Veracity, 0.85)
value.observe(web4_core.PyValueDimension.Validity, 0.88)

# 7. Identity coherence (C × S × Φ × R)
coherence = web4_core.PyCoherence.with_values(0.8, 0.8, 0.7, 0.9)
print(f"Total coherence: {coherence.total():.3f}")
print(f"Limiting factor: {coherence.limiting_factor()}")

For persistence, swap PyInMemoryLedger for PyLocalLedger:

ledger = web4_core.PyLocalLedger.open("./team-ledger.jsonl")
lct, _ = web4_core.PyLct.new(web4_core.PyEntityType.AiSoftware, None)
receipt = ledger.mint(lct)

# Reopen later — state is replayed from the file with chain-integrity checks
ledger = web4_core.PyLocalLedger.open("./team-ledger.jsonl")
restored = ledger.lookup(lct.id)
assert restored is not None

Worked example: durable host identity

The snippet above shows the primitives. The repo ships a small, self-contained script that turns them into a one-command setup for a host's persistent presence — keypair on disk (chmod 600), local hash-chained ledger, public LCT sidecar, and an idempotent re-run that verifies the chain instead of regenerating:

# Generate identity (or verify, if it already exists)
python examples/identity_bootstrap.py --name laptop-01

# Read-only attestation check
python examples/identity_bootstrap.py --name laptop-01 --verify

Source: python/examples/identity_bootstrap.py. Copy and adapt — change the entity type, point at a different base directory, layer hardware-binding (TPM / secure enclave) on top, etc.

Ledger backends

API Reference

Entity Types

• PyEntityType.Human — Human user
• PyEntityType.AiSoftware — Software-bound AI agent
• PyEntityType.AiEmbodied — Hardware-bound AI agent
• PyEntityType.Organization — Organization
• PyEntityType.Role — Role (first-class entity)
• PyEntityType.Task — Task
• PyEntityType.Resource — Resource
• PyEntityType.Hybrid — Hybrid entity

Trust Tensor (T3) — 3 Root Dimensions

T3 is fractally multidimensional. The three root dimensions below are each themselves open-ended RDF sub-graphs of context-specific sub-dimensions, linked via web4:subDimensionOf.

• PyTrustDimension.Talent — Natural aptitude and capability for a specific role
• PyTrustDimension.Training — Acquired expertise, certifications, and experience
• PyTrustDimension.Temperament — Behavioral consistency, reliability, ethical disposition

Use observe(dimension, score) to record a root-level observation, or observe_sub_dimension(name, parent, score) to record a sub-dimension under one of the roots.

Value Tensor (V3) — 3 Root Dimensions

Same fractal structure as T3.

• PyValueDimension.Valuation — Worth ascribed to the contribution
• PyValueDimension.Veracity — Truthfulness and reliability of the claim
• PyValueDimension.Validity — Soundness and applicability in context

Identity Coherence (C × S × Φ × R)

• C (Continuity) — Temporal consistency
• S (Stability) — Resistance to perturbation
• Φ (Phi) — Information integration
• R (Reachability) — Network connection

Coherence is multiplicative: a low score in any factor limits the whole. Use limiting_factor() to identify the bottleneck.

Crypto

• PyKeyPair.generate() — Generate a fresh Ed25519 keypair
• PyKeyPair.from_secret_bytes(bytes) — Reconstruct from 32-byte secret
• keypair.sign(message) — Sign bytes (returns 64-byte signature)
• lct.verify_signature(message, signature) — Verify against the LCT's public key
• web4_core.sha256(data) / sha256_hex(data) — SHA-256 helpers

Patent Notice

This software implements technology covered by US Patents 11,477,027 and 12,278,913, and pending application 19/178,619. See PATENTS.md for the patent grant terms.

License

AGPL-3.0-or-later. See LICENSE.