Transactions, fees and confirmations

When you send crypto, your transaction goes through a few steps before it becomes part of the permanent record. Knowing these steps helps you understand fees, waiting times and when a payment is truly "done."

Step 1: signing

Your wallet builds a message such as "send 0.2 coins from my address to this address" and signs it with your private key. The signature proves the owner approved it, without revealing the key itself.

Step 2: broadcasting and waiting

The signed transaction is sent to nodes on the network. It waits in a pool of unconfirmed transactions until a miner or validator includes it in a block. On Bitcoin this waiting area is called the mempool, short for memory pool.

Step 3: fees

Blocks have limited space, so you pay a network fee to get your transaction included. When the network is busy, people compete by offering higher fees, and those transactions usually go first. When it is quiet, fees drop. Fees go to the miners or validators, not to your wallet app (though apps and exchanges may add their own charges on top).

On Ethereum the fee is called gas. Complex actions, like using a lending app, use more gas than a simple transfer.

Step 4: confirmations

Once your transaction is in a block, it has 1 confirmation. Each new block added on top gives it one more. More confirmations make it harder to reverse, because an attacker would have to rebuild more blocks.

Finality

Finality means the point at which a transaction can no longer be reversed. On proof-of-work chains, finality is probabilistic: each extra confirmation makes reversal less likely, but there is no single magic moment. Many proof-of-stake chains have a defined step after which blocks are considered final by the protocol.

Why this matters for traders

Moving coins between wallets and exchanges takes time and costs fees. During sudden market moves, networks get busy and fees can jump. Plan transfers ahead instead of rushing them when prices are swinging.