Fee rate lets miners compare the revenue efficiency of transactions with different sizes. SegWit weight converts base and witness data into virtual bytes, so the relevant denominator is vsize, not raw bytes or the bitcoin amount transferred. Confirmation estimates reflect current mempool competition and future block production; they are forecasts, never guarantees.
The transaction fee divided by virtual size, normally expressed in satoshis per virtual byte.
Fee rate lets miners compare the revenue efficiency of transactions with different sizes. SegWit weight converts base and witness data into virtual bytes, so the relevant denominator is vsize, not raw bytes or the bitcoin amount transferred. Confirmation estimates reflect current mempool competition and future block production; they are forecasts, never guarantees.
A validating node can check the relevant transaction, block and policy data directly; a wallet, explorer, miner or routing service is useful infrastructure, not the final source of protocol truth.
Confirmation, fee and routing outcomes remain probabilistic and market-dependent. Consensus validity does not guarantee fast inclusion, privacy, low cost, liquidity or protection from a mistaken recipient.
Inspect destinations, amounts, fee rate and status before acting. Use reproducible wallet data, preserve recovery metadata and test the workflow with a small amount before relying on it at scale.
For the clearest picture, read this entry together with Transaction fees, Mempool, Replace-by-Fee (RBF), CPFP (Child Pays for Parent). The reverse links also lead from Change output, Confirmation, Replace-by-Fee (RBF), CPFP (Child Pays for Parent).