Monitor High-Value ENS Domain Registrations

Learn how to monitor ENS domain registrations that costs higher than 1 ETH using Moralis Streams API.

Programatically

JavaScript

const ensNameRegisteredAbi = [{
  "anonymous": false,
  "inputs": [
    {
      "indexed": false,
      "internalType": "string",
      "name": "name",
      "type": "string",
    },
    {
      "indexed": true,
      "internalType": "bytes32",
      "name": "label",
      "type": "bytes32",
    },
    {
      "indexed": true,
      "internalType": "address",
      "name": "owner",
      "type": "address",
    },
    {
      "indexed": false,
      "internalType": "uint256",
      "name": "cost",
      "type": "uint256",
    },
    {
      "indexed": false,
      "internalType": "uint256",
      "name": "expires",
      "type": "uint256",
    },
  ],
  "name": "NameRegistered",
  "type": "event",
}]; // valid abi of the event

const filter = {
  "and": \[
    { "eq": ["owner", "0x283Af0B28c62C092C9727F1Ee09c02CA627EB7F5"] },
    { "gt": ["cost", "1000000000000000000"] },
  ],
}; // only receive registration events if the owner is the address and the cost is higher than 1 ETH

const options = {
  chains: [EvmChain.ETHEREUM], // Ethereum Name Service so we only monitor Ethereum
  description: "ENS Name Registrations", // your description
  tag: "ensRegistrationByBob", // give it a tag
  abi: ensNameRegisteredAbi,
  topic0: ["NameRegistered(string,bytes32,address,uint256,uint256)"],
  includeContractLogs: true,
  advancedOptions: [
    {
      topic0: "NameRegistered(string,bytes32,address,uint256,uint256)",
      filter,
      includeNativeTxs: true,
    },
  ],
  webhookUrl: "<https://YOUR_WEBHOOK_URL>", // webhook url to receive events,
};

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

const { id } = stream.toJSON(); // { id: 'YOUR_STREAM_ID', ...stream }

// Attach the contract address to the stream
await Moralis.Streams.addAddress({
  id,
  address: "0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e", // ENS Registry address
});

Python

"""
requiremets: moralis python sdk
you can run this command to install it:
pip install moralis
"""

from moralis import streams


webhook_url = 'WEB_HOOK_URL_HERE'
api_key = 'API_KEY_HERE'

abi = [{
  "anonymous": False,
  "inputs": [
    {
      "indexed": False,
      "internalType": "string",
      "name": "name",
      "type": "string",
    },
    {
      "indexed": True,
      "internalType": "bytes32",
      "name": "label",
      "type": "bytes32",
    },
    {
      "indexed": True,
      "internalType": "address",
      "name": "owner",
      "type": "address",
    },
    {
      "indexed": False,
      "internalType": "uint256",
      "name": "cost",
      "type": "uint256",
    },
    {
      "indexed": False,
      "internalType": "uint256",
      "name": "expires",
      "type": "uint256",
    },
  ],
  "name": "NameRegistered",
  "type": "event",
}]

advanced_options = [
  {
    "topic0": "NameRegistered(string,bytes32,address,uint256,uint256)",
    "filter": {
      "and": [
        { "eq": ["owner", "0x283Af0B28c62C092C9727F1Ee09c02CA627EB7F5"] },
        { "gt": ["cost", "1000000000000000000"] }
      ]
    }
  }
]

body = {
    "webhookUrl": webhook_url,
    "description": "ENS Name Registrations",
    "tag": "ensRegistrationByBob",
    "topic0": ["NameRegistered(string,bytes32,address,uint256,uint256)"],
    "allAddresses": False,
    "includeNativeTxs": True,
    "includeContractLogs": True,
    "includeInternalTxs": False,
    "abi": abi,
    "advancedOptions": advanced_options,
    "chainIds": ["0x1"],
}

result = streams.evm.create_stream(
    api_key=api_key,
    body=body,
)

print(result)

# Attach the contract address to the stream
params = {
    "id": result["id"],
}
body = {
    "address": "0x00000000000C2E074eC69A0dFb2997BA6C7d2e1e",
}

result = streams.evm.add_address_to_stream(
    api_key=api_key,
    params=params,
    body=body,
)

print(result)

Via WebUI

1. Create a new Stream
2. Fill out the form
3. Switch on Event Emittance and Add the Abi and select the topic
4. Add below value to advanced options

[
  {
    "topic0": "NameRegistered(string,bytes32,address,uint256,uint256)",
    "filter": {
      "and": [
        { "eq": ["owner", "0x283Af0B28c62C092C9727F1Ee09c02CA627EB7F5"] },
        { "gt": ["cost", "1000000000000000000"] }
      ]
    }
  }
]

5. Click on create stream button.