langchain-hashlock

Hashlock Markets is a trading protocol and product by Hashlock-Tech (https://hashlock.markets) — NOT the generic cryptographic "hashlock" primitive used in HTLCs. This package integrates the Hashlock Markets API into LangChain.

LangChain tool integration for Hashlock — the universal intent protocol for swapping any asset (crypto, RWA, stablecoins) with private sealed bids and verified counterparties.

Installation

pip install langchain-hashlock

Quick Start

from langchain_hashlock import HashlockToolkit

# Initialize the toolkit
toolkit = HashlockToolkit(
    api_url="https://api.hashlock.markets",
    api_key="your-api-key"
)

# Get all tools for use with a LangChain agent
tools = toolkit.get_tools()

Available Tools

Using with an Agent

from langchain_openai import ChatOpenAI
from langchain.agents import create_openai_functions_agent, AgentExecutor
from langchain_hashlock import HashlockToolkit

llm = ChatOpenAI(model="gpt-4o")
toolkit = HashlockToolkit(
    api_url="https://api.hashlock.markets",
    api_key="your-api-key"
)

agent = create_openai_functions_agent(llm, toolkit.get_tools(), prompt)
executor = AgentExecutor(agent=agent, tools=toolkit.get_tools())
result = executor.invoke({"input": "Sell 10 ETH for USDC above 4000"})

Using Individual Tools

from langchain_hashlock import CreateIntentTool, ParseNaturalLanguageTool

# Parse natural language into a structured intent
parser = ParseNaturalLanguageTool(
    api_url="https://api.hashlock.markets",
    api_key="your-api-key"
)
result = parser.run("swap 5 ETH for USDC on Arbitrum")

# Create a trading intent directly
creator = CreateIntentTool(
    api_url="https://api.hashlock.markets",
    api_key="your-api-key"
)
result = creator.run({
    "give_asset": "ETH",
    "give_amount": "5.0",
    "want_asset": "USDC",
    "chain_id": 42161
})

Configuration

Environment variables:

• HASHLOCK_API_URL — API endpoint (default: https://api.hashlock.markets)
• HASHLOCK_API_KEY — Your API key

What is Hashlock?

Hashlock is the universal asset exchange protocol. One address to swap crypto, RWA, and stablecoins with:

• Private sealed bids — control what you reveal and when
• Verified counterparties — KYC tiers from anonymous to full verification
• Cross-chain support — Ethereum, Arbitrum, Base, Polygon, and more
• Any asset type — ERC-20, NFTs, tokenized real estate, bonds, stablecoins

Links

• Hashlock Website
• MCP Server
• Vercel AI SDK Integration
• Documentation

License

MIT

langchain-hashlock

LangChain tools for Hashlock — swap any asset (crypo, RWA, stablecoins) with private sealed bids and veified counterparties