Track Smart Contract Events in Real-Time with Web3

Let's create a stream that monitors all the events specific to a contract factory.

tip

This stream uses listen to all addresses feature that is available only on Business and Enterprise plans.

e

You will need an ABI that is used only on your contracts in order to not receive the events from other contracts that use the same ABI.

Programmatically: How to Listen to event from a contract factory

const Contract_Factory_ABI = [{
  "anonymous": false,
  "inputs": [
    { "indexed": true, "name": "from", "type": "address" },
    { "indexed": true, "name": "to", "type": "address" },
    { "indexed": true, "name": "contract", "type": "address" },
  ],
  "name": "factoryEvent",
  "type": "event",
}]; // valid abi of the event

const options = {
  chains: [EvmChain.ETHEREUM], // list of blockchains to monitor
  description: "monitor a contract factory", // your description
  tag: "contract_Factory", // give it a tag
  abi: Contract_Factory_ABI,
  includeContractLogs: true,
  allAddresses: true,
  topic0: ["factoryEvent(address,address,address)"], // topic of the event
  webhookUrl: "https://YOUR_WEBHOOK_URL", // webhook url to receive events,
};

const stream = await Moralis.Streams.add(options);

WebUI: How to Listen to event from a contract factory

1. Create a new Stream
2. Fill out the form
3. Switch on Event Emittance and Add the Abi and select the topic
4. Select Listen to all addresses and Contract interactions (logs)
5. Click on create stream button.