Crypto Foundations · Using Your Own Crypto
Confirmations, Network Fees and Blockchain Explorers
What You'll Learn
- What a "confirmation" actually represents
- Why network fees exist and what causes them to rise or fall
- How to use a blockchain explorer to check a transaction yourself
The Big Idea
Once you send a transaction, three very practical questions usually follow: Has it actually gone through? Why did it cost what it cost? And how can I check any of this myself? Let me answer all three, one at a time — confirmations, fees, and blockchain explorers.
A transaction leaves the sender, gets picked up by the network, gains confirmations as blocks are added on top, and finally settles with the recipient.
Let's Break It Down
A confirmation is simply one more block added on top of the block that contains your transaction. Each additional confirmation makes that transaction progressively harder to reverse, for the same reason you learned about in the blocks-and-mining lessons: undoing it would mean redoing the Proof of Work for every single block since. This is exactly why many services wait for a handful of confirmations before treating a transaction as final, instead of trusting it the instant it first appears in a block.
A network fee is a small payment attached to your transaction that goes to whichever miner includes it in a block. Here is something useful to know: because block space is limited, and many people may be transacting at the same time, miners generally prioritize transactions that offer higher fees. So fees tend to rise when the network is busy, and fall when it is quiet — similar to how a toll road might charge more during rush hour.
A blockchain explorer is a public website that lets anyone look up transactions, addresses and blocks directly from the network's own data. You do not need a login or an account. Because the ledger is public by design — remember the "shared spreadsheet" idea from earlier in this course — you can independently verify a transaction's status yourself, instead of relying on anyone else's word for it.
Real Example
Let me walk you through a real scenario. Say you send a transaction and look it up on a blockchain explorer. You might see "2 confirmations" next to it. What does that tell you? It means two additional blocks have been mined on top of the block containing your transaction since it was first included. The transaction is real, it is recorded, and it becomes more firmly settled into the chain's history with every confirmation that follows.
Why It Matters
These three ideas together are what let you independently verify what is happening with your transaction, instead of simply trusting an app's status message. Understanding why fees rise and fall also helps you make sense of why the exact same transfer might cost noticeably more during a busy moment than during a quiet one, even though nothing about the transaction itself has changed.
Common Mistake
I see this mistake often: people panic the moment a transaction shows "0 confirmations" or "pending." Please do not worry — that is the completely normal, expected state right after sending. It simply means the transaction has not been included in a block yet. It does not mean anything has gone wrong.
Quick Check
What does it mean when a transaction has more confirmations?
Key Takeaways
- A confirmation is one more block mined on top of your transaction's block — more confirmations mean more certainty.
- Network fees reward miners for including your transaction and tend to rise when the network is busy.
- A blockchain explorer lets anyone independently verify a transaction, address or block directly from public network data.
Finished reading?
Mark this lesson as complete to track your progress.