Finality
The point at which a blockchain transaction can no longer be reversed or replaced.
Finality is the point at which a confirmed blockchain transaction is treated as permanent. Before it, a transaction can in rare cases be dropped if the chain reorganises.
How it differs by network
- Bitcoin has no hard finality. Each new block makes reversal less likely, so receivers wait for several confirmations.
- TRON treats a block as solidified once enough Super Representatives have built on it, typically in about a minute.
- Ethereum finalises blocks at checkpoints between epochs of 32 slots, each slot lasting 12 seconds.
Why it matters for withdrawals
Exchanges and wallets credit a deposit once they consider it final. A casino payout can therefore appear on a block explorer before it shows in your exchange balance.