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Ethereum: Wallets that support 40 byte message attachment via OP_RETURN? Desktop / Mobile?

13 February، 2025 CRYPTOCURRENCY

Ethereum Wallets That Support OP_RETURN: A Guide to Desktop and Mobile Attachment

As Bitcoin 2.0 applications continue to proliferate, developers are exploring new ways to improve the user experience while keeping costs low. One popular technique is the use of the
OP_RETURN

parameter in Ethereum wallets to attach data to transactions without exceeding the traditional 40-byte limit.

In this article, we will dive deeper into the world of OP_RETURN and explore the various options for desktop and mobile wallet support.

What is OP_RETURN?

OP_RETURN (Open Transaction Reference) is a protocol introduced by the Ethereum Foundation that allows developers to create custom transaction data using the tx and vout parameters. This allows users to attach additional information, such as metadata or custom scripts, to their transactions without modifying the underlying blockchain code.

The 40-byte limit

As you mentioned, OP_RETURN transactions have a limited attachment size of 40 bytes. This is one of the reasons why wallets need to prioritize desktop vs. mobile support when deciding which option to use.

Desktop Wallets: The Verdict

Ethereum: Wallets that support 40 byte message attachment via OP_RETURN? Desktop / Mobile?

For users who prefer a more traditional wallet experience or require more customization options, desktop wallets are often the best choice. Desktop wallets like MetaMask, MyEtherWallet (MEW), and Electrum offer robust features, including:

  • Customizable transaction metadata
  • Ability to attach custom scripts using the script parameter
  • Support for multiple account management

Desktop wallet providers typically support both Windows and macOS versions.

Mobile Wallets: The Pitfall

While mobile wallets like Trust Wallet, Exodus, and Binance DEX offer a convenient experience, they often compromise on attachment sizes. If you prioritize attaching OP_RETURN data to your transactions, you may encounter limitations or restrictions on certain types of data.

However, some mobile wallet providers have started to address this concern by:

  • Enabling smaller attachments (e.g., 10-20 bytes) via a third-party plugin
  • Allowing users to create custom scripts using the script parameter

Please note that these options may be limited or require additional configuration on your mobile device.

Conclusion

In summary, while OP_RETURN offers a unique way to attach custom data to Ethereum transactions without exceeding the 40-byte limit, desktop wallets offer a more traditional experience with more customization options. However, mobile wallet support is improving, and some providers now offer smaller attachment sizes or additional scripting capabilities.

Before deciding which option best suits your needs, consider the following factors:

  • The type of wallet you prefer (desktop or mobile)
  • The type of data you want to attach (custom scripts or metadata)
  • Any limitations or restrictions on attachment size

By considering these factors and exploring various options, you can choose the solution that best suits your Ethereum wallet experience.

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