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polkadot{.js} extension

note

polkadot.js extension is a Substrate/EVM wallet created by the creators of Substrate & Polkadot/Kusama the Parity Team.

This is the barebones wallet. This is because it is the barebones Substrate wallet that supports all Substrate based networks. This is an extension that works similarly to MetaMask, or most other browser based wallets you’ve likely used in the past.

Create A New Wallet​

  1. Visit the Polkadot.js Website and Download your respective version.
tip

The Chrome option will work on all Chromium based browsers such as Brave, Vivaldi, & Edge

  1. Once extension is installed, Open it. Read the notes.

    step-2

  2. Click on + to add a new account.

    step-3

  3. The extension will then show you your 12-word mnemonic seed.

danger

MAKE SURE YOU STORE THIS SECURELY, AND NEVER SHARE IT

step-4

  1. Once you seed is securely stored and saved, click the “I have saved my mnemonic seed safely” check box and click “Next Step”

  2. The next step will ask for a Name & Password for the wallet. then click “Add the account with the generated seed”

    step-6

  3. Congratulations you have created a polkadot.js wallet!

    step-7

Importing an Existing Seed​

Some users may be provided an existing mnemonic seed phrase that may have been provided by Subspace-Desktop, if this is the case you will want to follow this portion of the guide.

  1. Install the Extension (See step 1 of the previous section)

  2. Once extension is installed, Open it and click +, & Import account from pre-existing seed

    step-2a

  3. Type or Paste in your 12-Word mnemonic seed phrase & click Next

    step-3a

  4. The next step will ask for a Name & Password for the wallet. then click Add the account with the supplied seed

    step-4a

Troubleshooting​

If you face any trouble or would like to learn about other features for Polkadot.js, please see the Official Polkadot.js Documentation. We have included some basic FAQ's below.

How can I find my Public Address?​

  • You can see your default substrate public address right below your Wallet name inside the extension

    trouble-1

  • You can see your Subspace Testnet public address via the ... menu and setting the Allow Use on Any Chain dropdown to Subspace Testnet, once you exit you will see the public address now starts with st

    trouble-2

    trouble-10

I Dont see Subspace Testnet or any Subspace Networks as an option in chain settings​

  • As seen below, sometimes when you first install or update the Substrate wallet you will need to update the wallet metadata.

    trouble-3

  1. Go to the Subspace/Polkadot Explorer here: Polkadot/Substrate Portal

  2. You will be prompted to allow the extension to connect, click Yes, allow this application access

    trouble-4

  3. On the Webpage, click settings

    trouble-5

  4. Click Metadata

    trouble-6

  5. Click Update Metadata

    trouble-7

  6. You will get a popup from the extension asking you to confirm click Yes, do this metadata update

    trouble-8

  7. You will now see Subspace Testnet as an option on the Allow use on any chain dropdown.

    trouble-9

How do I backup my wallet?​

  1. You can backup/export your wallet via the ... menu, then click Export Account

    trouble-11

  2. You will then enter your wallet password and click I want to export this account

    trouble-12