I don't know if this parameter is implemented in your bitcoin core version, but on
https://chainquery.com/bitcoin-api/sendtoaddress
You can see parameter 5: subtractfeefromamount (boolean), that is exactly what you want.

Just a general remark: it is usually more convenient for all users to know exactly what fees will be substracted.
As soon as you pass on the network fees directly to your customers, they will be encountering "random" fees, just depending on the network load. New users won't understand at all, why they received 0.1 BTC yesterday and 0.05 today.
Setting a fee that is generally a bit higher than the typical mining fees is the way of doing it predictably in the view of the users.

Do you have a transaction id of your transactions? That could possibly reveal why the coins aren't arriving.

Yeah, but I think it's neither the general problem of bitmixer, nor the problem of bitcoin mixers at all.
Folks using bitcoin as a mean for criminal activity could and will eventually use cryptocurrencies that don't have a public blockchain at all.
For me, bitcoin mixing as such is a way of giving legit users a chance for fulfilling their right of privacy.

Typically the receive amount shouldn't make you lose coins. Do you have the possibility to get the private keys of the destination addresses?

If you have access to your priv keys for your bitcoin addresses, there's no reason to have fear. Just make sure you have these keys in time.

I think it is like with any other currency, you need to work hard to be successful.
There are just a lot more scam offers that are bitcoin-related. Just don't believe in get-rich-quickly schemes.
Why should you? Who should pay for you getting rich for free?

As far as I know, there is no global list.

You can check validity by decoding it, as you mentioned, and then compare it to what you have in the mempool. If the inputs were already spent in your mempool, then there's something fishy going on...

Doesn't seem very plausible to me. Bitcoin as a decentralized system is just not very likely to be controlled by anyone in a kind of centralized way.

I would not invest all too much in altcoins.
If your goal is stability and long-term growth, bitcoin itself is a pretty good investment.

Well, sending bitcoins to an address where you don't have the private keys gives you very little hope for recovery.
I don't really understand who the owner of the address is you sent your bitcoins to, but maybe you can contact him, though there's little chance of success.

The case might be just as you described it. The coins will be lost. Forever.
Another reason why bitcoin may become more valuable on the long-run, ss the total amount that can be mined is limited.

So, you should take care that the private keys will be revealed in case of your death, including a description what you can do with it, if you want your family or other people to make use of your bitcoins. On the other hand, if you don't want anyone to know about the bitcoins, it's the perfect way of "destroying" money.

Definitely go for using bitcoin-core or similarly suited applications as your backend.
Just think of what happens if blockchain.info goes down or has temporary outages.
Your service reputation would drop and it would not even be your fault.

Be as standalone as possible!

I think it will be hard to get the initial momentum required to get your game site going.
But once it starts getting more popular, there might be a lot of interested people who cling to your site and will return on a regular basis.

Not only the list you mentioned has grown in an amazing way.
The bitcoin price scaled up in the same way.

I think it should be done by everyone. Because your data are private and belong to you and to you only.
It's a measure of security to your data and a great deal for your privacy, so what's against it? It's fairly simple to mix coins, so go for it!

I try to avoid the term "anonymity", because it often suggests something you have to hide.
For most of the people, the term "privacy" fits better to the topic we are talking about.
It's about the freedom to protect your transactions from being seen by those who don't have a right to see it.

And I think that this is perfectly possible with bitcoin, especially with the many tools around.

Ok. For me, it's hard to understand such a decision.
I personally continue believing in the possibility of privacy within the bitcoin payment system.

Especially today, where everyone becomes increasingly transparent, we should all work together to keep and defend our privacy more then ever.
There's an increasing number of people wanting to transfer bitcoins legally, without everyone being able to trace back their individual and private transactions.

That's why I think we continue to need bitcoin mixers. They are the essential mean that everyone can take easily to defend and keep up his privacy.

We should work together to keep bitcoin a payment system that works non-centralized and gives us the privacy standards we need. And that has enough services providing individual privacy, such that it stays attractive to everyone and gets even more adoption worldwide.

Since I started joining the bitcoin community, there arose many business, also local ones in my neighborhood that accept bitcoins as a mean of payments. They introduced bitcoin payments, because the decision makers rely on and believe in the many advantages that bitcoin offers.

Let's keep the advantages and the legal use up and encourage developers to create even more stunning apps and tools that make the use of bitcoin easy and secure and let's show the world what a great system bitcoin is!



For alternatives, check out my signature below.

As this question is very generic, I'll answer it in the same way.
If you wanted to code a wallet from scratch, you could code any kind of functionality that you desire into a wallet, as long as you can code it yourself or integrate it from existing code.
You can also extend a wallet of which the code is open source. You basically create a fork of the code and add the functionality you need.

However, the easier and more widespread way of creating software that is based on bitcoin is to use a wallet with minimum functionality like bitcoin core and then you can code a standalone application in whatever code language you want to, and then your wallet software communicates with the running bitcoin core via REST API requests.

Without knowing what your goal is, it is hard to be more specific here.

Wow, nice and detailed explanation HI-TEC99, thumbs up for this.

This depends on how much guarantee you want to have that the transaction is real and will not be double spent.
Typical values for the amounts of confirmations are 3 to 6.