@lendasat/lendaswap-sdk-native

Native Node.js bindings for Lendaswap with SQLite storage.

Overview

This package provides native Node.js bindings via napi-rs for the Lendaswap client with SQLite storage. It's designed for server-side applications, CLI tools, and backend services.

Recommended: Use this package through @lendasat/lendaswap-sdk with .withSqliteStorage() for a unified API across browser and Node.js.

Installation

# Install
pnpm add @lendasat/lendaswap-sdk-native

Platform Support

Pre-built binaries are available for:

• macOS (x64, ARM64)
• Linux (x64, ARM64)
• Windows (x64)

Usage (Recommended)

Use the main SDK with SQLite storage:

import {Client} from "@lendasat/lendaswap-sdk";

const client = await Client.builder()
    .url("https://apilendaswap.lendasat.com")
    .network("bitcoin")
    .arkadeUrl("https://arkade.computer")
    .esploraUrl("https://mempool.space/api")
    .withSqliteStorage("./lendaswap.db")
    .build();

await client.init();

// Get available trading pairs
const pairs = await client.getAssetPairs();

// Get a quote
const quote = await client.getQuote("btc_lightning", "usdc_pol", 100000n);

// Create a swap
const swap = await client.createLightningToEvmSwap({
    target_address: "0xYourPolygonAddress",
    source_amount: 100000,
    target_token: "usdc_pol",
}, "polygon");

Direct Usage (Advanced)

For advanced use cases, you can use the native SDK directly:

import {
    SqliteStorageHandle,
    ClientBuilder,
} from "@lendasat/lendaswap-sdk-native";

const storage = SqliteStorageHandle.open("./lendaswap.db");
const client = new ClientBuilder()
    .storage(storage)
    .url("https://apilendaswap.lendasat.com")
    .network("bitcoin")
    .arkadeUrl("https://arkade.computer")
    .esploraUrl("https://mempool.space/api")
    .build();

await client.init();

CLI Example

A full CLI example is available in examples/nodejs/:

cd client-sdk/examples/nodejs
pnpm install
node index.js help

Commands:

• pairs - List available trading pairs
• tokens - List available tokens
• quote <from> <to> <amount> - Get a quote
• swap <from> <to> <amount> <address> - Create and monitor a swap
• swaps - List stored swaps with transaction links
• info - Show wallet and API info

Supported Tokens

| Token | Chain | ID | | ----- | --------- | --------------- | | BTC | Lightning | btc_lightning | | BTC | Arkade | btc_arkade | | BTC | On-chain | btc_onchain | | USDC | Polygon | usdc_pol | | USDT | Polygon | usdt0_pol | | USDC | Ethereum | usdc_eth | | USDT | Ethereum | usdt_eth |

Related Packages

• @lendasat/lendaswap-sdk - Main SDK with unified API for browser (IndexedDB) and Node.js (SQLite)

License

MIT