CrossFi API Quickstart

To use the CrossFi API you'll need to create a free Alchemy account first!

Introduction

CrossFi is a blockchain platform built to enable seamless cross-chain asset transfers and decentralized finance (DeFi) applications. With a focus on interoperability, security, and scalability, CrossFi provides developers and users with a powerful ecosystem for deploying decentralized applications (dApps) that can operate across multiple blockchain networks.

What is the CrossFi API?

The CrossFi API facilitates interaction with the CrossFi network through a collection of JSON-RPC methods. Given its developer-friendly design, those familiar with Ethereum's JSON-RPC APIs will find working with CrossFi intuitive and straightforward.

Getting Started Instructions

1. Choose a Package Manager (npm or yarn)

Your first step involves selecting a package manager, which will be crucial for managing your project's dependencies. The choice between npm and yarn depends on your personal preference or project requirements.

2. Set Up Your Project

To kickstart your project, open your terminal and execute the following commands:

mkdir crossfi-api-quickstart
cd crossfi-api-quickstart
npm init --yes

mkdir flow-api-quickstart
cd flow-api-quickstart
yarn init --yes

This creates a new directory named crossfi-api-quickstart and initializes a Node.js project within it.

3. Make Your First Request

For making API requests, we'll use Axios, a widely-used HTTP client. Install Axios with the following command:

npm install axios
# Or with yarn
# yarn add axios

Next, create an index.js file in your project directory. Paste the following code to send a request to the CrossFi network:

const axios = require('axios');

const url = `https://crossfi-testnet.g.alchemy.com/v2/${yourAPIKey}`;

const payload = {
  jsonrpc: '2.0',
  id: 1,
  method: 'eth_blockNumber',
  params: []
};

axios.post(url, payload)
  .then(response => {
    console.log('Latest Block:', response.data.result);
  })
  .catch(error => {
    console.error(error);
  });

Remember to replace yourAPIKey with your actual Alchemy API key that you can get from your Alchemy dashboard.

4. Run Your Script

To execute your script and make a request to the CrossFi network, run:

node index.js

You should see the latest block information from CrossFi's blockchain outputted to your console:

Latest Block: { ... }

Next Steps

Well done! You've just made your first request to the CrossFi API. With this foundation, you can dive deeper into the array of JSON-RPC methods available on CrossFi and start building your dApps on it!