snap-langchain-tools

snap-langchain-tools

LangChain tools for SNAP — private agent-to-agent payments on Solana using zero-knowledge proofs.

Install

npm install snap-langchain-tools @langchain/core @solana/web3.js snap-solana-sdk

Quick Start

import { Connection, Keypair } from "@solana/web3.js";
import { createSNAPTools } from "snap-langchain-tools";

const connection = new Connection("https://api.mainnet-beta.solana.com");
const wallet = Keypair.generate();

const tools = createSNAPTools(connection, wallet);
// Returns: [SNAPListPoolsTool, SNAPDepositTool, SNAPWithdrawTool, SNAPEstimateFeeTool]

Tools

Tool	Description
snap_list_pools	List SNAP mainnet shielded pools
snap_deposit	Deposit SOL/USDC into a shielded pool
snap_withdraw	Withdraw with a Groth16 ZK proof
snap_estimate_fee	Estimate the 0.25% protocol fee

Usage with LangGraph Agent

import { ChatAnthropic } from "@langchain/anthropic";
import { createReactAgent } from "@langchain/langgraph/prebuilt";
import { createSNAPTools } from "snap-langchain-tools";

const tools = createSNAPTools(connection, wallet);
const agent = createReactAgent({
  llm: new ChatAnthropic({ model: "claude-sonnet-4-20250514" }),
  tools,
});

const result = await agent.invoke({
  messages: [{ role: "user", content: "List the available SNAP pools" }],
});

Mainnet Pools

Pool	Address
0.1 SOL	B8SyffZKt8LABKogWjH9rZcjY5PV2hyYRCbTxxbcrpFf
1 USDC	5LeuHrPBgHNhgbCy996MEjcsBk5gNHhVj6AiuuCHZ8od
10 USDC	ECuHf8kgiWfmL3Q6id4WGBQWvuukhzqvF5vsxuPAKZBv

Links

• SNAP Protocol
• Website
• SDK

License

MIT