quicknode-webhooks-events

# QuickNode Webhooks Events ## Overview Set up QuickNode Streams for real-time on-chain event processing with custom filters and webhook delivery. ## Prerequisites - QuickNode account with Streams access - HTTPS webhook endpoint ## Instructions ### Step 1: Create a Stream via Dashboard ```text 1. Dashboard > Streams > Create Stream 2. Select chain: Ethereum Mainnet 3. Filter: Contract events for specific address 4. Destination: Webhook URL 5. Set payload format: JSON ``` ### Step 2: Handle Stream Events ```typescript import express from 'express'; const app = express(); app.post('/webhooks/quicknode', express.json(), async (req, res) => { const events = req.body; for (const event of events) { console.log(`Block: ${event.blockNumber}`); console.log(`TX: ${event.transactionHash}`); console.log(`Topics: ${event.topics}`); // Process on-chain event await processBlockchainEvent(event); } res.status(200).json({ received: true }); }); ``` ### Step 3: Filter by Contract Events ```javascript // Stream filter function (runs on QuickNode infrastructure) function main(data) { const targetContract = '0xA0b86991c6218b36c1d19D4a2e9Eb0cE3606eB48'; // USDC const transferTopic = '0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef'; return data.streamData.filter(tx => { return tx.logs?.some(log => log.address.toLowerCase() === targetContract.toLowerCase() && log.topics[0] === transferTopic ); }); } ``` ## Output ...