How to sign a message with your wallet – Help | Blockpass Support

Why do I need to sign a message?

By signing a message with your wallet, you prove that you are the owner of the funds that the wallet holds. Also it's the proof that you control the private key of this address

How do I sign?

Blockpass currently supports Metamask and Wallet Connect.

How to prove ownership of my wallet using Blockpass Web ID?

The following describes usage where a desktop environment is only used for the Blockpass ID and the wallet.

Click on the Verify With button provided by the Business
Add your email

Receive a magic link via email and click on 'Continue registration'

You will need to have added your identity document to be able to add your crypto address.
Click on add crypto address (in the example below “Ethereum Address”)

1. Web browser on desktop connects wallet installed on a desktop

Continue your connection by selecting MetaMask (example here is based on MetaMask https://metamask.io/)

Accept the connection in MetaMask to Blockpass

The wallet address will be imported into your Blockpass ID

Click on Sign a Message to prove you own your wallet

The signature will be imported into your Blockpass ID

Click 'SAVE' to complete your wallet connect

2. Web browser on a desktop connects a wallet installed on mobile

When you submit your crypto wallet, select WalletConnect to open the QR code

Wallet Connect supports hundreds of wallets.

You can verify that your wallet is supported at this URL: https://explorer.walletconnect.com/?type=wallet

Log in to the wallet installed in your phone that you intend to connect
Click on the ‘Scan’ symbol to scan the QR code
Click on the ‘Connect’ button displayed on your phone to connect that wallet to your Identity profile

Your wallet is auto-connect to your identity profile in desktop
Click on ‘Sign a message’ in desktop

A phone screen is shown for you to ‘Sign’

Once the Signature is auto-filled, click ‘SAVE’ to finish your wallet submission.

3. Web browser on mobile connects a wallet installed on mobile

Complete your wallet submission by following the steps in case 2 above. However, now you are required to re-open between the web browser and crypto wallet tabs on your mobile phone.

4. Web browser on mobile connects a wallet installed on desktop

Unfortunately, we currently DO NOT support connecting in this way.

How to prove ownership of my wallet using the Blockpass Mobile App?

If you are using the Blockpass Mobile App please follow these steps:

Click on the Verify With button provided by the Business
Select the link “Blockpass Mobile App”

Click on Continue with Mobile App

1. If I am using web browser on your desktop

Open your Blockpass Mobile App

Click on the Scan button in Mobile App

Scan QR code presented

Then follow normal KYC requirements

2. If I am using a web browser on your mobile phone

After clicking on ‘Continue with mobile app’, continue by selecting ‘Launch the app and register’. In case you do not have Blockpass app installed yet, select ‘Download on the app store’

When you get to the wallet section then click on add new crypto address (for example Add New Ethereum Address)

Click on Wallet Connect

Ensure that you have a compatible wallet installed on your mobile phone and that it is active (check for compatible wallets here: https://explorer.walletconnect.com/?type=wallet)
For the purpose of this example we will use MetaMask

Click on MetaMask
MetaMask will open and invite you to connect to Blockpass. Accept the connection.

Your wallet address will be imported into Blockpass.
Then click on “Sign a message” to prove that you own the wallet

Then MetaMask will re-open for you to sign the message. Once signed the signature will be imported back into your Blockpass profile
Click 'SAVE' to finish your wallet connection

Notes

If you have several wallets installed as web extension in your browser, pick the Metamask option. Depending on your local settings, another wallet might be prioritized and opens instead of Metamask.

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