signedby 0.1.0b3

SIGNEDBYME SDK - Human-Controlled Identity for Autonomous Agents

SIGNEDBYME Python SDK

Human-Controlled Identity for Autonomous Agents

What is SIGNEDBYME?

SIGNEDBYME is the identity layer for autonomous agents. Agents prove membership in enterprise-authorized groups using Groth16 zero-knowledge proofs — without revealing which agent they are. The enterprise gets a boolean: authorized. No identity revealed.

This SDK enables agents to generate cryptographic identity, produce zero-knowledge proofs, and authenticate to enterprises via NOSTR and OIDC.

Installation

pip install signedby

Quick Start

from signedby import AgentIdentity, EncryptedFileStorage, MembershipProver, NostrClient

# Initialize secure storage
storage = EncryptedFileStorage("./agent_data")

# Create agent identity (one-time setup)
identity = AgentIdentity(storage)
state = identity.initialize()

print(f"Agent npub: {state.agent_npub}")
print(f"Leaf commitment: {state.leaf_commitment}")

# Generate Groth16 proof for authentication
prover = MembershipProver.from_circuits_dir("./circuits")

leaf_secret = identity.get_leaf_secret()
witness = load_witness(storage, "acme")

proof = prover.generate_proof(leaf_secret, witness)
print(f"Proof generated in {proof.proof_time_ms}ms")

# Publish proof to NOSTR (async)
client = await NostrClient.connect(identity)
await client.publish_proof_event(proof_data)

Features

• DID Generation: secp256k1 keypair in secure storage (OS keyring, Keychain, DPAPI), never extractable
• Groth16 ZK Proofs: BN254 curve, ~101K constraints, <3s on ARM64 via native Rust core (PyO3)
• Bitcoin-Backed: Identity fused with Lightning payment at creation via NWC (NIP-47)
• NOSTR Integration: Publish kinds 28101 (proof), 28102 (delegation ack), 28103 (revocation ack); poll for kinds 28200/28250/28251; NIP-42 relay authentication; decentralized audit trail on public relays
• Witness Caching: Merkle path cached locally, auto-refresh when root rotates out of 30-root window

Modules

Module	Purpose
signedby.AgentIdentity	DID generation, leaf_secret derivation
signedby.EncryptedFileStorage	Encrypted storage with OS keyring (ChaCha20-Poly1305)
signedby.MembershipProver	Groth16 proof generation via native Rust
signedby.NostrClient	NOSTR relay client with NIP-42 auth
signedby.EnrollmentBootstrap	Three-gate genesis flow
signedby.DelegationValidator	Delegation validation (kind 28250/28251)
signedby.NwcWallet	NWC wallet integration (NIP-47)

SDK Lifecycle

One-Time Initialization

1. Generate DID in secure storage
2. Derive leaf_secret (5 BN254 field elements)
3. Compute leaf_commitment = Poseidon2(leaf_secret)
4. Load Groth16 proving key (~88MB)
5. Initialize NWC wallet for Lightning

Enrollment per Enterprise

Three-gate genesis flow — runs once per enterprise:

• Gate 1: Email + token verification via kind 28202
• Gate 2: Human signs kind 28250 delegation
• Gate 3: Leaf appended to Merkle tree

Authentication

1. Generate Groth16 proof from leaf_secret + cached witness
2. Publish kind 28101 to NOSTR
3. Enterprise validates and calls API
4. Agent receives OIDC id_token

Requirements

• Python 3.9+
• Native libraries bundled for supported platforms

Supported Platforms

• Linux x64 (glibc)
• Linux ARM64 (glibc)
• macOS x64 (Intel)
• macOS ARM64 (Apple Silicon)
• Windows x64

Documentation

• SDK Quick Start
• API Reference
• Understanding Delegation

License

SSAL-1.0 (SIGNEDBYME Source-Available License)

Links

• GitHub
• Website