How a Blockchain Transaction Moves from Submitted to Final
You click "Send." Your wallet shows "Pending." A few seconds later - on Solana - a block explorer says "Confirmed." On Bitcoin, it might take an hour before you see six confirmations.
These status labels are not all the same. Nor do they all mean the same thing.
The Broadcast Phase
Every transaction starts the same way. Your wallet signs a message with your private key and broadcasts it to the network. At this point the transaction exists nowhere permanent. It sits in a node's memory pool - the mempool - waiting to be picked up.
On Bitcoin, the mempool is public. You can watch unconfirmed transactions pile up on mempool.space. On Solana, there is no public mempool. Validators see pending transactions, but the general public does not.
A transaction in the mempool is not final. It has not begun.
Proof-of-Work: Bitcoin
Bitcoin miners compete to solve a cryptographic puzzle. The winner builds a block containing roughly 2,000 - 3,000 transactions and broadcasts it. That first block entry is called the block height - one confirmation.
One confirmation provides probabilistic finality. Statistically, the chance a block gets orphaned drops as more blocks stack on top. Exchanges typically wait for six confirmations (about one hour) before counting a deposit as settled.
Check a Bitcoin explorer like blockchain.com. A transaction with "1 confirmation" means it appears in one block. "6 confirmations" means five later blocks were built on top of that same block. The network did not change its mind.
What "confirmed" actually guarantees on Bitcoin: The transaction is included in a block that the network accepted as valid. It does not guarantee the block will never be reorged. A reorg is rare but possible - typically caused by two miners finding a block at nearly the same time and the network briefly splitting.
Proof-of-Stake: Solana
Solana uses a different mechanism. Validators are chosen to produce blocks based on the amount of SOL they stake. There is no mining. There is no lottery-solving.
When your transaction enters the Solana mempool, a leader validator bundles it into a block. Because Solana targets 400-millisecond block times, a transaction can appear as "finalized" in under a second. The explorer label "Finalized" on Solscan means the block has been confirmed by a supermajority of the network's stake - over two-thirds of validators.
But "finalized" on a proof-of-stake chain does not mean what "6 confirmations" means on Bitcoin. On Solana, finality is economic, not computational. If a validator controls more than one-third of staked SOL, they could theoretically halt finality. That has never happened on Solana mainnet. It is a known theoretical risk.
On Solana, "confirmed" usually means one validator signed the block. "Finalized" means the block received two more rounds of validator votes. You can check both statuses on Solscan.
When is value actually transferred?
Appearing on an explorer is not the same as irreversible settlement.
A Bitcoin transaction with one confirmation could still be reversed if a miner with more hashrate builds a competing chain. That is expensive and unlikely for small amounts. For a $10,000 transaction, six confirmations is the standard.
On Solana, a transaction showing "Finalized" on the explorer is effectively irreversible under normal network conditions. But if the network stalls - which has happened - a transaction that was "finalized" might later appear in a different order after validators agree on a new fork. The transaction is not lost; its place in history might shift.
The safest rule for any chain: wait until the explorer shows the relevant threshold for your use case. For an exchange deposit, follow the exchange's requirement. For a peer-to-peer payment, wait until you see enough confirmations that a reorg would cost more than the transaction value.
The Persistent Misconception
Many users believe that seeing a transaction on Etherscan or Solscan means the money has moved permanently. It does not. The explorer shows what the network's current best view of history is. That view can change.
On Bitcoin, a 0-confirmation transaction is not settled. On Solana, one confirmation is not settled the way six Bitcoin confirmations are settled. The label "confirmed" is not identical across chains.
Explorers are windows into the network's current consensus. They are not oracles of permanent truth. Treat them as snapshots, not guarantees.
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