@hashlock-tech/sdk

TypeScript SDK for the Hashlock Markets developer API — non-custodial cross-chain atomic swaps (BTC ↔ EVM/TRON). Runs on Node 18+, browsers, and edge runtimes (native fetch / WebSocket, zero runtime dependencies).

⚠️ Sandbox / testnet preview (0.x) — defaults to api-dev.hashlock.markets, testnets only, pre-mainnet. The API may change before the stable 1.0. Not for mainnet funds.

npm i @hashlock-tech/sdk

import { HashlockClient, newSecret, verifyWebhook, MakerFeed } from '@hashlock-tech/sdk';

const client = new HashlockClient({ apiKey: process.env.HASHLOCK_API_KEY! });
await client.me();

// cursor pagination — page or auto-iterate
const page = await client.listSwaps({ limit: 20 });
for await (const swap of client.swaps()) { /* … */ }

// webhooks: verify a delivery against the raw body
const ok = await verifyWebhook({ secret, rawBody, signature: req.headers['x-hashlock-signature'], timestamp: req.headers['x-hashlock-timestamp'] });

// maker feed: stream RFQs and quote over a socket
const feed = new MakerFeed({ apiKey, onRfq: (rfq) => feed.quote(rfq.id, '650000') });
await feed.connect();

Settlement is custody-agnostic: buildFund / buildClaim / buildRefund return unsigned transactions — sign with your wallet or HSM (see ../examples/fireblocks) and broadcast(...) (or let your custody provider broadcast). See the root README for the full swap lifecycle.

Build

npm install && npm run build   # tsup → dist (esm + d.ts)
npm run typecheck

MIT