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

​
Programmatically

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: 
"""
Requirements: moralis python sdk
Install with: 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, then select the topic
  4. Add the following value to advanced options:
[
  {
    "topic0": "NameRegistered(string,bytes32,address,uint256,uint256)",
    "filter": {
      "and": [
        { "eq": ["owner", "0x283Af0B28c62C092C9727F1Ee09c02CA627EB7F5"] },
        { "gt": ["cost", "1000000000000000000"] }
      ]
    }
  }
]
  1. Click on the create stream button.