How do transactions in the blockchain work

What I don’t understand is the need for the hashing of B’s public key

Hashing the public key is done for two reasons. It is a cost saving measure as it reduces the size of A’s transaction. It also protects the actual public key so that, if Elliptic Curve Cryptography is broken, the private key cannot be reversed from the public key because the public key is not known until it is used in an input to a transaction.

and the previous transaction,

Including the hashing of the previous transactions lets a transaction refer to the transactions it is spending from so that you can verify whether the money is legitimate.

and what exactly is being verified/signed.

The message that is signed is the transaction (the one that is being created) itself. Of course it does not contain the signatures, but it contains everything else – the transactions being spent from and the outputs being created. This protects the other parts of the transaction from being modified by people not authorized to spend the money.

If transaction i – 1 is being hashed in transaction i, that means only transaction i – 1 is known. It says nothing about transaction i – 2, where the same money that is being spent in transaction i could have already been spent. It doesn’t seem like transaction i – 1 or i keeps a list of all previous transactions, so there’s no way of verifying where the buyer in i actually has the money.

Transaction i - 1 contains the hash of transaction i - 2, which contains the hash of i - 3, and so on and so forth until you reach transaction i - i (the “first” transaction) which is a special transaction known as a coinbase. This is a coin generation transaction. Thus by following the entire chain of transactions backwards, you can verify if the money actually exists.

c# – Is it possible to work out rotate in degrees per second based on this rotate logic?

I have this code to rotate an object towards another at a given speed.

    /// <summary>
    /// Rotate towards the target.
    /// </summary>
    /// <param name="lookPosition"></param>
    private void RotateTowardsTarget(Vector3 lookPosition)
        // Determine which direction to rotate towards
        Vector3 targetDirection = lookPosition - transform.position;

        // The step size is equal to speed times frame time.
        float singleStep = weaponRotationSpeed * Time.deltaTime;

        // Rotate the forward vector towards the target direction by one step
        Vector3 newDirection =
            Vector3.RotateTowards(turretYRotation.transform.forward, targetDirection, singleStep, 0.0f);

        // Draw a ray pointing at our target in
        //Debug.DrawRay(turretYRotation.transform.position, newDirection,, 3);

        newDirection.y = 0;
        // Calculate a rotation a step closer to the target and applies rotation to this object
        turretYRotation.transform.rotation = Quaternion.LookRotation(newDirection);

And I’d like to convert this to a “Degrees per second” to give the user useful feedback on how quickly it rotates. Is there a formulae I can apply to work it out?

dnd 5e – How does the phoenix’s Fire Form work?

You’ll have to ask your DM

To start with, a phoenix could definitely light something on fire while flying. As you state, all that is required is a “touch” and there is no reason the phoenix would need to stop to touch something. Touching is not in itself defined in the rules (since we are not casting a spell), so we are forced to use the plain definition, which your example satisfies.

However, the issue with your specific example is whether a rooftop is a “flammable object”.


Most rooftops, even historic ones from ages past, were designed to be as fire resistant as possible/affordable. Now, if the phoenix is flying past an un-oiled thatch roof, that is one thing, but a DM may say that other types of roofs are not readily flammable.


There is considerable debate on what the rules consider an “object” (see this Q&A for more details). I’m forced to conclude that objects aren’t clearly defined in the rules, but they are at least considered distinct from a “structure” (as many features call out both objects and structures as separate things). That being said, the Dungeon Master’s Guide and this Q&A discuss that structure are composed of objects. Whether or not a rooftop (likely a portion of a structure: a building) is considered an object, though, is ultimately up to the DM.

As a side note: Keep in mind that moving 5 feet and using a non-action would only be a necessary explanation if grid rules are being used which are considered a variant rule.

For Blender+Unity users— Would Blender’s “UV Project Modifier” work in Unity?

So, say in Blender you have a Cube that you put a “UV Project Modifier” on, with a Bone as the Projector. In Blender when you move the Bone, the UV moves on the cube. Great!​

But now let’s say you wanted to bring that to Unity. Would that still actually work (being able to move the UV around with bone movement) or would it be busted?

I’m trying to test it myself and it seems a dud but I already struggle with Blender’s export process so wanted to check here.

What is reseller club, i mean how does their program work?


It seems i am the only person unable to understand resellerclubs reseller program as i can’t find much information on it over the internet.

I completely understand their part as domain reseller but getting so much confused when it comes to their hosting reselling.

As i understand the conventional reseller setup via WHM, one have to purchase a reseller hosting package from which they can create cPanel accounts and sell those to clients at their desired prices. But as i registered with resellerclub as a reseller and topped up my account, they were already giving me options to sell their hosting but at the same time, they are offering Reseller Hosting Package.

So my confusion is, can i sell their hosting same as their domain names. Like i just have to keep enough balance in my RC account so if any of customer places order, the product will be purchased with my account balance. If it is so, it would be perfect for me to get started with my reselling website.

And if reselling their hosting is same as reselling their domain names (without purchasing any reseller hosting package w/ cpanel), can i integrate their reselling setup with my wordpress site, so customer will be purchasing all the hosting and domain stuff directly on my wordpress site instead of their supersite.

I have also seen “Resellerclub Mods” modules for WHMCS from which i am assuming that it is possible to integrate whole setup of RC (hosting & other products) into whmcs. Please let me know if it is true.

Sorry if you find these questions very basic or stupid but i am really new to hosting and seen whmcs interface first time yesterday.

Also, i stumbled upon their new Web-Pro Panel video, that was looking very promising but i think it is not yet available for everyone as i saw on youtube comment, they were asking someone to provide the reseller id so they will activate webpro panel on the account. So i am assuming it is in beta version yet but any kind of information on Web-Pro Panel would be greatly appreciated as well.

Thank you!

Somebody signed up for Facebook using my email. Disabling does not work

I do not have a Facebook account and I do not wish to sign up for one.

At the end of January, I started getting Arabic Facebook mails.
Apparently somebody had signed up to Facebook using my Gmail address (with an additional ‘.’; think rather than, which still ends up being directed to me.)

At first I just ignored it because I assumed it was a phishing attempt, but it soon became clear that the mails were actually from Facebook.

I soon found the links at the bottom of the mails that would allow me to ‘disavow contact‘, prompting me to an English Facebook page asking me if I wanted to disable the account.

Didn’t sign up for Facebook with this account?

Someone recently tried to sign up for Facebook using ( If that wasn’t you, you can disable the account.

But whenever I try to do this, it says

Sorry, something went wrong.

We’re working on getting this fixed as soon as we can.

It has been a couple of weeks and it still does not work.

What can I do? I do not merely want to block mails from Facebook, I want this account not to be tied to my email address.

I will do very good work in design, data entry and copy paste in a very short time. for $10

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I designed this gig for clients like you who need long term committed services. I provide high-quality virtual assistant services beyond data entry, data mining, web research and copy-paste.

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Spreadsheet Creation/Document Updating

PowerPoint Presentation

Linkedin & Instagram Management

Graphics Design/Photoshop Work

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Property Listing/Management of Listings

CRM Handling/Project Management

Website Management/WordPress/WooCommerce/Plugin Setup

I am offering a special discounted price of $5 per hour for the first few clients.


webforms – Item Textarea doesn’t work correctly with the spacebar under Chrome Browser

I use Drupal v8.8.5 and Webform v8.x-5.11.

Issue only with Chrome Browser, because all it’s correct with others browsers.
In a Webform with the object , users wish enter normaly text on zone “Message”. The spacebar has a big issue:
No space beetween words and do an automatic scroll down the page of the web site.

What is the name of the JavaScript file to fix and what to do with Chrome ?
By example I think about it, but I don’t know how to do it :

// Detect enter key and space bar and allow the standard response for them,
// except for form elements of type 'textarea', where the 
// spacebar activation causes inappropriate activation if #ajax('keypress') is 
// TRUE. On a text-type widget a space should always be a space.
if (event.which == 13 || (event.which == 32 && element.type != 'text' && element.type != 'textarea')) {
     return false;

Could you help me?