On Cardano the minimum fee for a transaction is a × size + b, where size is the transaction's serialized size in bytes. On mainnet, a (the per-byte component, minFeeA / txFeePerByte) is 44 lovelace per byte and b (the fixed component, minFeeB / txFeeFixed) is 155,381 lovelace. Both are protocol parameters and can be changed through governance and parameter updates. Because the size is known before submission, the exact fee is knowable in advance.
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- UTXOUnspent Transaction Output, the accounting model Cardano shares with Bitcoin where transactions consume whole earlier outputs and create new ones, similar to spending banknotes and getting change back.View term
- eUTXOCardano's extension of the UTXO accounting model; each output can carry datum and script logic, so smart contracts express rules without the shared mutable state used by account-based chains.View term
- UTxO Cost per ByteThe protocol parameter that prices each byte of on-chain storage a UTxO occupies, used to derive the minimum ada that must accompany any new output.View term