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JavaScript Examples

Custom implementation examples using JavaScript and popular libraries.

For production use, see the TypeScript SDK which provides full type safety, WebSocket streaming, and advanced features.

Setup​

npm install axios ethers

Basic Request​

const axios = require('axios');

const client = axios.create({
  baseURL: 'https://api.axol.io/v1',
  headers: {
    'X-API-Key': process.env.AXOL_API_KEY,
    'Content-Type': 'application/json'
  }
});

async function getStatus(chain) {
  const { data } = await client.get(`/blockchain/${chain}/status`);
  return data;
}

WebSocket Connection​

const WebSocket = require('ws');

function connectWebSocket() {
  const ws = new WebSocket(`wss://ws.axol.io?token=${process.env.AXOL_API_KEY}`);

  ws.on('open', () => {
    ws.send(JSON.stringify({
      type: 'subscribe',
      channels: ['gas_prices_ethereum']
    }));
  });

  ws.on('message', (data) => console.log('Update:', JSON.parse(data)));
  ws.on('error', console.error);
  
  return ws;
}

Transaction Monitoring​

async function monitorTransaction(txHash, chain = 'ethereum') {
  while (true) {
    const { data } = await client.get(`/blockchain/${chain}/tx/${txHash}`);
    
    if (data.confirmations >= 12) {
      console.log('Transaction confirmed!');
      break;
    }
    
    console.log(`Confirmations: ${data.confirmations}`);
    await new Promise(r => setTimeout(r, 5000));
  }
}

Gas Price Oracle​

async function getOptimalGasPrice(chain = 'ethereum') {
  const { data } = await client.get(`/gas/${chain}/current`);
  return {
    economy: data.slow,
    normal: data.standard,
    priority: data.fast
  };
}

async function sendTransaction(wallet, to, value) {
  const gas = await getOptimalGasPrice();
  const ethers = require('ethers');
  
  return wallet.sendTransaction({
    to,
    value: ethers.parseEther(value),
    gasPrice: ethers.parseUnits(gas.normal.toString(), 'gwei')
  });
}