@layerhop/goat

GOAT SDK plugin for LayerHop: best-price cross-chain and same-chain swap quotes across EVM chains and Solana, unsigned transactions, simulation, tracking, token lookup, prices, deposit addresses and checkout.

LayerHop never sees keys. Swaps are signed by the GOAT wallet client you configure (your own signer); layerhop_execute_swap only hands it the transactions for a quote the user explicitly confirmed.

npm install @layerhop/goat @goat-sdk/core

import { openai } from "@ai-sdk/openai";
import { getOnChainTools } from "@goat-sdk/adapter-vercel-ai";
import { viem } from "@goat-sdk/wallet-viem";
import { generateText } from "ai";
import { layerhop } from "@layerhop/goat";

const tools = await getOnChainTools({
  wallet: viem(walletClient), // your viem WalletClient: it signs, LayerHop never sees the key
  plugins: [layerhop({ integrator: "myapp", integratorFeeBps: 25 })], // partner fee on every swap
});

const { text } = await generateText({
  model: openai("gpt-5"),
  tools,
  maxSteps: 6,
  prompt: "Quote 50 USDC on Base to ETH on Arbitrum for my wallet, and wait for my confirmation.",
});

Tools: layerhop_list_chains, layerhop_list_tokens, layerhop_get_prices, layerhop_get_quote, layerhop_build_transaction, layerhop_simulate_transaction, layerhop_report_submitted, layerhop_get_order_status, layerhop_get_swap_link, layerhop_create_deposit_address, layerhop_get_deposit_address, layerhop_create_checkout_session, plus layerhop_execute_swap on EVM wallet clients.

layerhop_execute_swap { quoteId, userConfirmed: true } refuses unless the quote was made with sender = the wallet's address, has not expired and the wallet is on the quote's chain. It sends the ERC-20 approval only when the allowance is short, then the swap, then reports the hash for tracking. Test-mode placeholder transactions are never sent. Pass enableSwapExecution: false for a quote-only agent; Solana wallets get the unsigned transaction to sign.

Tested with @goat-sdk/core 0.5.0.

Guide: https://docs.layerhop.com/guides/agent-frameworks

MIT licensed.