How to validate flow account on backend?

⚙️ Flow SDKs
1

Hi, I have a question about binding flow account with game account without any gas fee.

If a user create flow account from frontend web client,
How to validate this flow account user in backend server?

Is there a method signing a message from client side and validate message in backend server?

2

At this point this is only possible in a 10 minute window after the user signs the transaction, because signed transactions expire after 10 minutes. The team is working on a more robust solution for this, but it isn’t ready yet

3

I think a 10 minute is enough to verify.
Can you explain,
How can I verify signed transaction on backend? and
How to create signed transaction to send to backend on client side?

Thanks

4

I would recommend checking out the SDK docs on Flow’s docs website: https://docs.onflow.org/
Those will show you how to do this. :slight_smile:

5

I cannot find any signing method for custom message in js sdk.
I’m finding a method to sign(web client) and verify(server) account without network.

like eth web3 things,

  1. sign custom message with private key
    sign
  2. verify it without private key
    recover
6

@sideninja Are you aware if this is possible with any of the sdks?