Blockchain Confirmation Explained: Why Transfers Need Confirmations

Have you ever had this experience: you made a transfer, and it keeps showing "confirming", making you anxious?

Today I'll explain clearly why blockchain needs a confirmation mechanism and how this mechanism works.

First, a personal story. When I first got into blockchain, I made a transfer and thought it was completed as soon as I saw the transaction hash.

Result, half an hour later, I was told the transaction was rolled back, and the money came back.

That's when I understood: seeing the hash doesn't mean it's arrived, you have to wait for confirmations.

Why do we need confirmations? Let's use sending a letter through the post office as an analogy.

You drop the letter in the mailbox, that's just the first step. The postman has to collect it, take it to the post office, sort it, then deliver it to the recipient.

Only when the whole process is complete is the letter truly delivered.

Blockchain's confirmation mechanism is similar to this process.

After a transaction is sent, it needs to be packaged into a block by miners, and this block still needs to be "stamped" with confirmations by subsequent blocks.

Each additional confirmation makes the possibility of the transaction being reversed smaller.

Generally speaking, after 6 confirmations, this transaction can be considered safe.

Of course, confirmation speed varies between chains. Some are fast, some are slow.

I know someone who thought confirmations were too slow, shipped goods after just seeing one confirmation, and got hit with a double-spend attack.

Lost quite a bit of money, and regretted it immensely.

So, wait patiently for confirmations, don't rush.

Although the confirmation mechanism might seem slow, it's precisely because it's slow that security is guaranteed.

If a transaction could be easily reversed, who would dare use this system?

To sum up: the confirmation mechanism is an important guarantee of blockchain security.

Next time you make a transfer, don't worry, wait a few more confirmations, and feel at ease.