Providing transaction ID wouldn't be enough if the same address is given to different people and especially if there are many customers.
I can simply search for the address on a block explorer, pick the hash of an incoming transaction and claim that I have made that transaction.

The simple solution is to give different addresses to different people.


OP isn't talking about people buying people. He/she is talking about people buying things and using bitcoin as payment method.

When you make a bitcoin transaction, you are the one who sets the transaction fee.
Since the block size is limited and miners can't include any number of transactions they want, they have to pick some transactions. To maximize their profit, they pick the transactions with higher fee rate.
Therefore, if you are in a hurry, you should use a high fee rate and if you are not in a hurry, you can set the fee rate as low as possible.

Have you ever deposited bitcoin to an exchange? If so, have you ever asked yourself how they know the deposit has been made by me? Exchanges give a new address to each of users and that's how they can know who has made a deposit.
If you have a store and want to accept payments in bitcoin, you can do the same thing.

As you said yourself, the transaction OP is referring to isn't standard and nodes will reject it. This means that the transaction doesn't enter the mempool of any node at all.
If a mining pool want to include that transaction, they keep it on their candidate block until they find a block.

Yes. I am sure.


To see the pay table, click on "i" button at top right corner of the page before spinning the wheel of fortune.
Below is the pay table.


 

As you said yourself, that address is owned by Binance.
As we all know, Binance is a big exchange and they have many users. It's not surprising that the address in question has received such big amount of bitcoin.
What's the problem now? What do you find mysterious?

With doing this, you lose access to the fund and the children will be able to spend it while you are still alive. It's possible that one day you need the fund yourself.
Your suggestion is good if you want to give bitcoin to your children as a gift.

In the case you want your children to have access to your bitcoin after your death, without them being able to spend the fund before your death, you can use locktime feature.
For more information, visit the following topic and read the guide provided by LoyceV.

Using Locktime for inheritance planning, backups or gifts

As I said in my previous post, nothing has changed.
You won reward points in those three spins, just because you rolled numbers lower than 332,308,319.
Every time you spin the wheel, some mathematical calculations are done and you get a random number.
You get 50 RP, if you hit a number between 0 and 329,308,319, you get 500 RP if you hit number between 329,308,320 and 331,308,319 and you get 5000 RP if you hit a number between 331,308,320 and 332,308,319.

Now it's not like the early days when people could mine bitcoin with a regular computer, but miners are still making profit with their mining hardware and joining mining pools.
Take note that bitcoin total hashrate has increased by around 85% in the past year.

I am not sure I am understanding you correctly. Is your question "Why a bitcoin transaction can include multiple inputs and outputs?"

If I am understating you correctly:
You will send the change to yourself.
Assume that you have two UTXOs. One is worth 0.1 BTC and the other one is worth 0.2 BTC. You want to send 0.25 BTC to someone. Your transaction will include two outputs. One of them will be worth 0.25 BTC and will be sent to recipient. The other one will be worth 0.05 BTC minus transaction fee and will be sent back to yourself as change.

I think it not's possible to implement that at all.
I don't think there is any way for the forum to know whether the user who visited the thread scrolled down to read your reply or not. It's only possible to know how many users visited the thread.

I just tried to broadcast the transaction in question using coinb.in and got the following error.
non-mandatory-script-verify-flag (Using non-compressed keys in segwit) (code 64)

If I am not wrong, the transaction isn't standard due to spending bitcoin from a segwit address derived from an uncompressed private key.
The only thing you can do is to contact a mining pool and ask them to include the transaction in a block. (It's very unlikely that any mining pool will accept such a request.)

It may worth mentioning that a mini private key can be also in 22 character format.
For more information, visit Mini private key format on Bitcoin Wiki.

Are you sure he/she is a friend? Most probably your friend was scammed by a stranger in messaging applications.


I hope your friend isn't going to make another deposit.
Any service asking you to make a deposit to be able to make a withdrawal is a scam and there are no exceptions.

Take note that taproot addresses are also segwit.
Addresses that start with bc1q are segwit version 0 and addresses that start with bc1p are segwit version 1.

Using taproot addresses isn't always beneficial and that's why they are not much common.
The main purpose of taproot upgrade was improving privacy when using multi-signature addresses.
With using taproot addresses, you can also decrease the transaction fee when you spend bitcoin from multi-signature addresses or there are big number of inputs.

Take a look at the topic created by Charles-Tim. Sometimes, with using taproot addresses, not only you don't decrease the transaction fee, but you increase the transaction fee.
Pay-to-taproot (P2TR) transaction fee

It should be noted that electrum can provides the same security as a hardware wallet only if it's used on an air-gapped device. Otherwise, it would be still a hot wallet and prone to hacking.


It's OP's fault.
Even if there was a vulnerability or a backdoor caused OP to lose the fund, it's still OP's fault that he/she used a close-source wallet while there are many good open-source wallets.

No. OP shouldn't use Coinomi anymore and should go for an open-source wallet.
As I already said, coinomi is close-source and even if you use a strong password, there is no guarantee that your wallet is safe.

It may worth mentioning that even if you use a trustworthy open-source wallet an an online device, your fund isn't still completely secure. Any online device is prone to hacking.

Coinomi is a close-source wallet and we don't know how the keys are generated and whether they have access to users keys or not.
Take note that this doesn't mean they have definitely stolen you fund. There can be many other reasons.

1. It's possible that you used a weak password and someone was able to brute-force it.
2. It's possible that someone had access to your seed phrase.
3. It's possible that your device was compromised.

Even if they have stolen your fund, it's still your own fault. Because you used a close-source wallet.

If you can generate your seed phrase by yourself (assuming you do the steps correctly), that's great.
Using electrum on a safe device (recommended to be air-gapped) is also good. Electrum is an open-source wallet and is secure enough.


Electrum allow you to generate a 24 word seed phrase. To do so, go to console and use the following command.