With all crypto wallets, you must safeguard your seed phrases and private keys.
Before you start cloning any wallet into MetaMask, please make sure you do a backup of your wallets: the wallet you want to clone (let’s say Trust or any other wallet that you currently use) and your current MetaMask wallet.
Backup means that you need to take the Seed Phrases from your current wallet that you want to clone, and then also take the Seed Phrases from your current MetaMask wallet and write it down somewhere safe. They are the keys to these wallets, so don’t lose them and don’t share with anyone.
Please see the article Web3 Domains Security Guide and Best Practices, published when .zil domains were launched.
The same best practices apply to all wallets.
MetaMask is often regarded as using a “12-word Seed Phrase,” whereas some wallets like MEW use 24 words.
1. The first step is to take your Seed Phrase from the wallet you want to clone (It can be Trust wallet or any other kind of wallet you use). Go to your wallet settings and take the Seed Phrase.
2. The second step - you need to Log Out from the current MetaMask wallet. This you can do by simply pressing on the big colorful bubble in the top right corner of your MetaMask wallet and the “LOCK” button:
3. Import your wallet Seed Phrase into MetaMask: You will see the “Import using Secret Recovery Phrase” sign once you Log Out from your current MetaMask wallet:
4. Once you press this link, you will see the option to enter your Seed Phrase together with the new Password for your MetaMask wallet. This will be your new MetaMask wallet, but the clone from, let’s say, Trust or any other wallet that you want to clone.
You can type in 12 or 24-word Seed Phrases - MetaMask supports both ways.
Specifically, it supports the 24-word seed phrases you may have from MEW wallets.
If you have Web3 Domains in a MEW wallet and you find a 3rd party site like OpenSea that works better with Metamask, you can clone the wallet as follows:
Switch to a browser you don’t currently have Metamask installed on (or remove Metamask in your regular browser if you are 100% sure it has no assets and you did the backup!!!).
Install Metamask and, when prompted, restore the MEW account to Metamask with the 24-word Seed Phrase (even though Metamask indicates it requires a 12-word seed).
You can import Seed Phrases in Metamask without a fresh installation of the extension, but for many domain owners, it’s less confusing to use the procedure above.
Metamask is not a system-wide application, and installations in different browsers will have different seeds, keys, and addresses. Ensure you know which browser and wallet you used to store your Web3 Domains and always safeguard and BACKUP the Seed Phrase.
Finally, crypto wallets don’t contain any assets (domains or cryptocurrencies). The assets are on the blockchain and the wallets, including hardware wallets like Ledger, simply grant control of the assets to the private key holder within the wallet.