alchemy-webhooks-events

# Alchemy Webhooks & Events (Notify API) ## Overview Alchemy Notify provides real-time push notifications for on-chain events. Instead of polling, receive webhook callbacks for wallet activity, mined transactions, dropped transactions, and smart contract events. ## Webhook Types | Type | Trigger | Use Case | |------|---------|----------| | Address Activity | ETH/token transfer to/from address | Wallet notifications | | Mined Transaction | Transaction confirmed on-chain | Payment confirmation | | Dropped Transaction | Transaction removed from mempool | Failed tx alerting | | NFT Activity | NFT transfer events | Marketplace notifications | | Custom Webhook | GraphQL-defined filter | Complex event tracking | ## Instructions ### Step 1: Create Webhook via Dashboard or API ```bash # Create Address Activity webhook via Alchemy API curl -X POST "https://dashboard.alchemy.com/api/create-webhook" \ -H "X-Alchemy-Token: ${ALCHEMY_AUTH_TOKEN}" \ -H "Content-Type: application/json" \ -d '{ "network": "ETH_MAINNET", "webhook_type": "ADDRESS_ACTIVITY", "webhook_url": "https://your-app.com/webhooks/alchemy", "addresses": [ "0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045" ] }' ``` ### Step 2: Webhook Handler with Signature Verification ```typescript // src/webhooks/alchemy-handler.ts import express from 'express'; import crypto from 'crypto'; const router = express.Router(); router.post('/webhooks/alchemy', express.raw({ type: 'application/json' }),...