Tag: check

How do I check a signature of any message?

I would like to have a p2sh transaction with the OP_CHECKSIG (or any other op code) in the redemption script checking a signature for any message (no transaction).
I searched, but all I could find is that OP_CHECKSIG only checks signatures in the transaction. I need a signature check to pass the message (hash of the message) to the review process.
Something similar to ecrecover that records a signature, the verification key, and the message. Is that even possible with the existing opcodes?

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How do I check if someone has cheated "likes"?

Hello,

I think someone cheats "likes". There is a paid contest, and the one who has the most "likes" wins (outside of Facebook, but integrated with a Facebook API within an HTML5 page). One user, who currently has about 140 friends and had about 500 likes on one day at 9am, climbed to about 5,000 "likes" at 11am that day. This is unbelievable as it is impossible that in just 2 hours he had so many people he wanted to tell!

This violates the competition rules. how one…

How do I check if someone has cheated "likes"?

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Authentication – How to check if a user can see GUI elements without having to query the microservice each time?

I am trying to find a way to check if the user has permission to view a restricted area without having to request the server each time.

At the moment I have the following idea:

Authentication and Authorization with JWT

For the flowchart I have the following questions:

  1. Should the news service be a additional signed tokenthat contains permissions / roles for the message service?
  2. Reissue the existing JWT and include permissions as well as message service-wide roles?
  3. Issue a server-side request that tells the user if they can see a particular GUI.

Which of the ways to store and retrieve microservices (based on accessLevel) most meaningful?

Since the user may be able to change the JWT or additional token and see the restricted GUI (since they are not checked on the client side), the worst may be that the user issues server requests that are not executed because the user does not have the permission has the ability to perform the action as soon as the server side is active.

To edit: I tried to simplify the question and focus on one topic.

python – How do I check if there are multiple images and how do I place them in a slideshow?

hala, someone could help me, I test python + flask for the web development, but this question has surfaced, I have a slideShow in the bootstrap and I would like to know how I can check if there are several pictures in folder x and this Publish in the slideshow. If you have 10 and margins and then want to add 11, check the amount and it will be added to the slideshow.