How ​​to Search for OP_RETURN Data on Ethereum

OP_RETURN is a unique identifier used by the Ethereum network to store small amounts of value, allowing for efficient and secure transactions. If you’re looking to search for a specific OP_RETURN address in the blockchain, you can use the following methods.

Method 1: Using the Blockchain.info API

You can use the Blockchain.info API to retrieve information about an OP_RETURN transaction, including its value. Here’s how to do it:

• Register on Blockchain.info: Sign up for a free account and verify your email address.

• Get your Opaque Address: Generate an opaque address by following these steps:

* Go to the Ethereum explorer ([ and select “Transaction Details” or “Block Details”.

* Find the transaction that contains your desired OP_RETURN value.

* Click on the transaction details button next to it.

• Extract the Opaque Address: In the transaction details page, click on the “Details” tab. This will show you the address and other transaction data. Look for the part with the “Opaque” label. That’s your OP_RETURN address!

• Use the API to Search: Once you have your opaque address, you can use it in the Blockchain.info API to search for more information about that specific address.

Here’s an example of how to do this using the API:

GET 

Replace {transactionHash} with the actual hash of your desired OP_RETURN transaction, and {opaqueAddress} with your opaque address.

Method 2: Searching on Ethereum Explorer

You can also search for OP_RETURN data in real-time using the Ethereum explorer. Here’s how:

• Open the Ethereum Explorer

  : Go to the Ethereum explorer ([ and select “Search “at the top.

• Enter your Query: In the search bar, enter a query for the OP_RETURN value you’re looking for (e.g., 554e6963444320).

• Filter Results: Use the filter options to narrow down the results by address type (e.g., “OpReturn”), transaction type (e.g., “Transaction”), and timestamp.

Method 3: Using a Script

You can also use scripts to search for OP_RETURN data on Ethereum. Here’s an example of how you can do this:

const Web3 = require('web3');

const web3 = new Web3(new Web3.providers.HttpProvider('


const ethAddress = '0x554e6963444320'; // Your opaque address


web3.eth.getTransactionCount(ethAddress, (err, account) => {

  if (err) throw err;

  web3.eth.getBalance(account, (err, balance) => {

    if (err) throw err;

    console.log(Account Balance: ${balance});

  });

});


const opReturnData = web3.eth.abi.encodeFunctionName('OpReturn');

web3.eth.getTransaction(ethAddress, opReturnData, { from: account }, (err, txHash) => {

  if (err) throw err;

  console.log(txHash);

});

This script gets the transaction count for your opaque address, then uses it to get its balance. Finally, it encodes a function name for the OpReturn transaction and calls it with your Opaque Address as an argument.

In all cases, you can use these methods to search for OP_RETURN data in the Ethereum blockchain. Make sure to replace {opaqueAddress} with your actual opaque address when using the API or script examples.

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