Metadata-Version: 2.4
Name: le-agent-sdk
Version: 0.4.2
Summary: Python SDK for Lightning Enable Agent Service Agreements
Project-URL: Homepage, https://lightningenable.com
Project-URL: Repository, https://github.com/refined-element/le-agent-sdk-python
Project-URL: Issues, https://github.com/refined-element/le-agent-sdk-python/issues
Author-email: Lightning Enable <dev@lightningenable.com>
License-Expression: MIT
License-File: LICENSE
Keywords: agent,ai,l402,lightning,nostr
Classifier: Development Status :: 3 - Alpha
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: MIT License
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.10
Classifier: Programming Language :: Python :: 3.11
Classifier: Programming Language :: Python :: 3.12
Classifier: Topic :: Software Development :: Libraries :: Python Modules
Requires-Python: >=3.10
Requires-Dist: coincurve>=18.0
Requires-Dist: httpx>=0.24.0
Requires-Dist: l402-requests>=0.1.0
Requires-Dist: websockets>=11.0
Provides-Extra: dev
Requires-Dist: pytest-asyncio>=0.21; extra == 'dev'
Requires-Dist: pytest>=7.0; extra == 'dev'
Description-Content-Type: text/markdown

# le-agent-sdk

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Python SDK for Lightning Enable Agent Service Agreements.

Discover, request, and settle agent-to-agent services over Nostr with L402 Lightning payments.

## Installation

```bash
pip install le-agent-sdk
```

> **0.4.0 fixes signature verification silently passing when the crypto backend is
> unavailable, plus two payment-budget bypasses. Upgrading is recommended** — see
> the [changelog](CHANGELOG.md).

> **0.4.0 replaces the `secp256k1` dependency with [`coincurve`](https://pypi.org/project/coincurve/).**
> `secp256k1` required a native build and could not be installed on Windows at all;
> `coincurve` ships prebuilt wheels, so installation no longer needs a C toolchain.
> The signature wire format is unchanged — events signed by 0.3.x still verify,
> which is covered by cross-implementation tests against the .NET SDK and the
> BIP-340 published vectors. If your own code imported `secp256k1` and relied on
> this package to pull it in, declare it directly.

Signing, key derivation, and signature verification all need the crypto backend.
If it is not importable they raise `CryptoBackendUnavailableError` (aliased as
`Secp256k1UnavailableError`) rather than degrading to a weaker check — in
particular, verification never reports an unverifiable event as authentic.

## Quick Start

### Provider: Publish a Service

Register an agent capability on the Nostr network so other agents can discover it.

```python
import asyncio
from le_agent_sdk import AgentManager, AgentCapability, AgentPricing

async def main():
    manager = AgentManager(
        private_key="<your_hex_private_key>",
        relay_urls=["wss://agents.lightningenable.com"],
    )

    cap = AgentCapability(
        service_id="translate-v1",
        categories=["ai", "translation"],
        content="AI translation service. Supports 50+ languages.",
        pricing=[
            AgentPricing(amount=10, unit="sats", model="per-request"),
        ],
        l402_endpoint="https://api.lightningenable.com/l402/proxy/translate",
        hashtags=["translation", "ai"],
    )

    event_id = await manager.publish_capability(cap)
    print(f"Published capability: {event_id}")

    # Listen for incoming service requests
    async for request in manager.listen_requests():
        print(f"Request from {request.pubkey}: {request.content}")

asyncio.run(main())
```

### Requester: Discover and Use Services

Find available services and settle via L402 payments.

```python
import asyncio
from le_agent_sdk import AgentManager

async def main():
    manager = AgentManager(
        private_key="<your_hex_private_key>",
        relay_urls=["wss://agents.lightningenable.com"],
    )

    # Discover translation services
    capabilities = await manager.discover(
        categories=["translation"],
        hashtags=["ai"],
        limit=10,
    )

    for cap in capabilities:
        print(f"[{cap.service_id}] {cap.content[:60]}...")
        if cap.pricing:
            print(f"  Price: {cap.pricing[0].amount} {cap.pricing[0].unit}/{cap.pricing[0].model}")

    # Settle via L402 if endpoint available
    chosen = capabilities[0]
    if chosen.l402_endpoint:
        result = await manager.settle_via_l402(chosen)
        print(f"Result: HTTP {result.status_code}")

asyncio.run(main())
```

## API Reference

### Core Classes

| Class | Description |
|-------|-------------|
| `AgentManager` | Main entry point. Manages Nostr connections, publishes capabilities, discovers services, and handles L402 settlement. |
| `AgentCapability` | Defines a service offering with pricing, categories, endpoints, and metadata. Published as Nostr kind 38400 events. |
| `AgentServiceRequest` | Represents a request for service from one agent to another (kind 38401). |
| `AgentServiceAgreement` | Bilateral contract between provider and requester (kind 38402). |
| `AgentAttestation` | Post-completion review of an agent (kind 38403): rating 1-5, review text, optional payment proof. The building block for on-protocol reputation. |

### Nostr Layer

| Class | Description |
|-------|-------------|
| `RelayClient` | WebSocket client for Nostr relay communication. Handles subscriptions and event publishing. |
| `NostrEvent` | Nostr event construction, serialization, and signing. |
| `TagParser` | Utilities for parsing and building Nostr event tags. |

### Payment Layer

| Class | Description |
|-------|-------------|
| `L402Client` | HTTP client with automatic L402 challenge-response handling. Wraps [l402-requests](https://github.com/refined-element/l402-requests). |
| `AgentPricing` | Pricing model (amount, unit, per-request/per-token). |

### Reputation (`AgentManager` methods)

| Method | Description |
|--------|-------------|
| `publish_attestation(subject_pubkey, agreement_id, rating, content="", proof=None)` | Publish a review of an agent after a completed agreement (kind 38403). `rating` must be 1-5; `proof` is an optional hash of the L402 payment preimage. Returns the published `AgentAttestation`. |
| `get_attestations(pubkey, limit=20, timeout=5.0)` | Query relays for attestations about an agent. Returns `list[AgentAttestation]`. |
| `get_reputation_score(pubkey, limit=50, timeout=5.0)` | Average rating (1.0-5.0) computed from attestations, or `None` if the agent has no attestations yet. |

#### Example: Attest and Check Reputation

```python
import asyncio
from le_agent_sdk import AgentManager

async def main():
    manager = AgentManager(
        private_key="<your_hex_private_key>",
        relay_urls=["wss://agents.lightningenable.com"],
    )

    # After a completed service agreement, publish a review
    attestation = await manager.publish_attestation(
        subject_pubkey="<provider_pubkey>",
        agreement_id="<agreement_event_id>",
        rating=5,
        content="Fast, accurate translation. Would hire again.",
    )
    print(f"Published attestation: {attestation.event_id}")

    # Before hiring an agent, check its track record
    score = await manager.get_reputation_score("<provider_pubkey>")
    if score is None:
        print("No attestations yet")
    else:
        print(f"Reputation: {score:.1f}/5.0")

asyncio.run(main())
```

## Protocol

Agent Service Agreements use four Nostr event kinds:

- **38400** -- Agent Capability: provider advertises available services
- **38401** -- Agent Service Request: requester asks for a service
- **38402** -- Agent Service Agreement: bilateral contract with terms and pricing
- **38403** -- Agent Attestation: post-completion review (rating 1-5) that builds on-protocol reputation

Settlement happens via L402 (Lightning HTTP 402) through Lightning Enable endpoints.

## Related Projects

- [le-agent-sdk (TypeScript)](https://github.com/refined-element/le-agent-sdk-ts) -- `npm install le-agent-sdk`
- [le-agent-sdk (.NET)](https://github.com/refined-element/le-agent-sdk-dotnet) -- `dotnet add package LightningEnable.AgentSdk`
- [Lightning Enable MCP Server](https://github.com/refined-element/lightning-enable-mcp) -- MCP server with ASA tools for AI agents
- [l402-requests](https://github.com/refined-element/l402-requests) -- Python L402 HTTP client
- [Lightning Enable](https://lightningenable.com) -- L402 infrastructure and agent payment rails

## License

MIT
